drivers/pci/hotplug/pci_hotplug_core.c

   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 <kristen.c.accardi@intel.com>
  25  *
  26  */
  27
  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>
  33 #include <linux/kobject.h>
  34 #include <linux/sysfs.h>
  35 #include <linux/pagemap.h>
  36 #include <linux/slab.h>
  37 #include <linux/init.h>
  38 #include <linux/mount.h>
  39 #include <linux/namei.h>
  40 #include <linux/mutex.h>
  41 #include <linux/pci.h>
  42 #include <linux/pci_hotplug.h>
  43 #include <asm/uaccess.h>
  44 #include "../pci.h"
  45
  46 #define MY_NAME "pci_hotplug"
  47
  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)
  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);
  65 static DEFINE_MUTEX(pci_hp_mutex);
  66
  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;                                                 \
 106         if (!try_module_get(ops->owner))                                \
 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);                                         \
 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)
 120 GET_STATUS(max_bus_speed, enum pci_bus_speed)
 121 GET_STATUS(cur_bus_speed, enum pci_bus_speed)
 122
 123 static ssize_t power_read_file(struct pci_slot *slot, char *buf)
 124 {
 125         int retval;
 126         u8 value;
 127
 128         retval = get_power_status(slot->hotplug, &value);
 129         if (retval)
 130                 goto exit;
 131         retval = sprintf (buf, "%d\n", value);
 132 exit:
 133         return retval;
 134 }
 135
 136 static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf,
 137                 size_t count)
 138 {
 139         struct hotplug_slot *slot = pci_slot->hotplug;
 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
 175 static struct pci_slot_attribute hotplug_slot_attr_power = {
 176         .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR},
 177         .show = power_read_file,
 178         .store = power_write_file
 179 };
 180
 181 static ssize_t attention_read_file(struct pci_slot *slot, char *buf)
 182 {
 183         int retval;
 184         u8 value;
 185
 186         retval = get_attention_status(slot->hotplug, &value);
 187         if (retval)
 188                 goto exit;
 189         retval = sprintf(buf, "%d\n", value);
 190
 191 exit:
 192         return retval;
 193 }
 194
 195 static ssize_t attention_write_file(struct pci_slot *slot, const char *buf,
 196                 size_t count)
 197 {
 198         struct hotplug_slot_ops *ops = slot->hotplug->ops;
 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
 207         if (!try_module_get(ops->owner)) {
 208                 retval = -ENODEV;
 209                 goto exit;
 210         }
 211         if (ops->set_attention_status)
 212                 retval = ops->set_attention_status(slot->hotplug, attention);
 213         module_put(ops->owner);
 214
 215 exit:
 216         if (retval)
 217                 return retval;
 218         return count;
 219 }
 220
 221 static struct pci_slot_attribute hotplug_slot_attr_attention = {
 222         .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR},
 223         .show = attention_read_file,
 224         .store = attention_write_file
 225 };
 226
 227 static ssize_t latch_read_file(struct pci_slot *slot, char *buf)
 228 {
 229         int retval;
 230         u8 value;
 231
 232         retval = get_latch_status(slot->hotplug, &value);
 233         if (retval)
 234                 goto exit;
 235         retval = sprintf (buf, "%d\n", value);
 236
 237 exit:
 238         return retval;
 239 }
 240
 241 static struct pci_slot_attribute hotplug_slot_attr_latch = {
 242         .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO},
 243         .show = latch_read_file,
 244 };
 245
 246 static ssize_t presence_read_file(struct pci_slot *slot, char *buf)
 247 {
 248         int retval;
 249         u8 value;
 250
 251         retval = get_adapter_status(slot->hotplug, &value);
 252         if (retval)
 253                 goto exit;
 254         retval = sprintf (buf, "%d\n", value);
 255
 256 exit:
 257         return retval;
 258 }
 259
 260 static struct pci_slot_attribute hotplug_slot_attr_presence = {
 261         .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO},
 262         .show = presence_read_file,
 263 };
 264
 265 static char *unknown_speed = "Unknown bus speed";
 266
 267 static ssize_t max_bus_speed_read_file(struct pci_slot *slot, char *buf)
 268 {
 269         char *speed_string;
 270         int retval;
 271         enum pci_bus_speed value;
 272
 273         retval = get_max_bus_speed(slot->hotplug, &value);
 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
 288 static struct pci_slot_attribute hotplug_slot_attr_max_bus_speed = {
 289         .attr = {.name = "max_bus_speed", .mode = S_IFREG | S_IRUGO},
 290         .show = max_bus_speed_read_file,
 291 };
 292
 293 static ssize_t cur_bus_speed_read_file(struct pci_slot *slot, char *buf)
 294 {
 295         char *speed_string;
 296         int retval;
 297         enum pci_bus_speed value;
 298
 299         retval = get_cur_bus_speed(slot->hotplug, &value);
 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
 314 static struct pci_slot_attribute hotplug_slot_attr_cur_bus_speed = {
 315         .attr = {.name = "cur_bus_speed", .mode = S_IFREG | S_IRUGO},
 316         .show = cur_bus_speed_read_file,
 317 };
 318
 319 static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf,
 320                 size_t count)
 321 {
 322         struct hotplug_slot *slot = pci_slot->hotplug;
 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
 345 static struct pci_slot_attribute hotplug_slot_attr_test = {
 346         .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR},
 347         .store = test_write_file
 348 };
 349
 350 static bool has_power_file(struct pci_slot *pci_slot)
 351 {
 352         struct hotplug_slot *slot = pci_slot->hotplug;
 353         if ((!slot) || (!slot->ops))
 354                 return false;
 355         if ((slot->ops->enable_slot) ||
 356             (slot->ops->disable_slot) ||
 357             (slot->ops->get_power_status))
 358                 return true;
 359         return false;
 360 }
 361
 362 static bool has_attention_file(struct pci_slot *pci_slot)
 363 {
 364         struct hotplug_slot *slot = pci_slot->hotplug;
 365         if ((!slot) || (!slot->ops))
 366                 return false;
 367         if ((slot->ops->set_attention_status) ||
 368             (slot->ops->get_attention_status))
 369                 return true;
 370         return false;
 371 }
 372
 373 static bool has_latch_file(struct pci_slot *pci_slot)
 374 {
 375         struct hotplug_slot *slot = pci_slot->hotplug;
 376         if ((!slot) || (!slot->ops))
 377                 return false;
 378         if (slot->ops->get_latch_status)
 379                 return true;
 380         return false;
 381 }
 382
 383 static bool has_adapter_file(struct pci_slot *pci_slot)
 384 {
 385         struct hotplug_slot *slot = pci_slot->hotplug;
 386         if ((!slot) || (!slot->ops))
 387                 return false;
 388         if (slot->ops->get_adapter_status)
 389                 return true;
 390         return false;
 391 }
 392
 393 static bool has_max_bus_speed_file(struct pci_slot *pci_slot)
 394 {
 395         struct hotplug_slot *slot = pci_slot->hotplug;
 396         if ((!slot) || (!slot->ops))
 397                 return false;
 398         if (slot->ops->get_max_bus_speed)
 399                 return true;
 400         return false;
 401 }
 402
 403 static bool has_cur_bus_speed_file(struct pci_slot *pci_slot)
 404 {
 405         struct hotplug_slot *slot = pci_slot->hotplug;
 406         if ((!slot) || (!slot->ops))
 407                 return false;
 408         if (slot->ops->get_cur_bus_speed)
 409                 return true;
 410         return false;
 411 }
 412
 413 static bool has_test_file(struct pci_slot *pci_slot)
 414 {
 415         struct hotplug_slot *slot = pci_slot->hotplug;
 416         if ((!slot) || (!slot->ops))
 417                 return false;
 418         if (slot->ops->hardware_test)
 419                 return true;
 420         return false;
 421 }
 422
 423 static int fs_add_slot(struct pci_slot *slot)
 424 {
 425         int retval = 0;
 426
 427         /* Create symbolic link to the hotplug driver module */
 428         pci_hp_create_module_link(slot);
 429
 430         if (has_power_file(slot)) {
 431                 retval = sysfs_create_file(&slot->kobj,
 432                                            &hotplug_slot_attr_power.attr);
 433                 if (retval)
 434                         goto exit_power;
 435         }
 436
 437         if (has_attention_file(slot)) {
 438                 retval = sysfs_create_file(&slot->kobj,
 439                                            &hotplug_slot_attr_attention.attr);
 440                 if (retval)
 441                         goto exit_attention;
 442         }
 443
 444         if (has_latch_file(slot)) {
 445                 retval = sysfs_create_file(&slot->kobj,
 446                                            &hotplug_slot_attr_latch.attr);
 447                 if (retval)
 448                         goto exit_latch;
 449         }
 450
 451         if (has_adapter_file(slot)) {
 452                 retval = sysfs_create_file(&slot->kobj,
 453                                            &hotplug_slot_attr_presence.attr);
 454                 if (retval)
 455                         goto exit_adapter;
 456         }
 457
 458         if (has_max_bus_speed_file(slot)) {
 459                 retval = sysfs_create_file(&slot->kobj,
 460                                         &hotplug_slot_attr_max_bus_speed.attr);
 461                 if (retval)
 462                         goto exit_max_speed;
 463         }
 464
 465         if (has_cur_bus_speed_file(slot)) {
 466                 retval = sysfs_create_file(&slot->kobj,
 467                                         &hotplug_slot_attr_cur_bus_speed.attr);
 468                 if (retval)
 469                         goto exit_cur_speed;
 470         }
 471
 472         if (has_test_file(slot)) {
 473                 retval = sysfs_create_file(&slot->kobj,
 474                                            &hotplug_slot_attr_test.attr);
 475                 if (retval)
 476                         goto exit_test;
 477         }
 478
 479         goto exit;
 480
 481 exit_test:
 482         if (has_cur_bus_speed_file(slot))
 483                 sysfs_remove_file(&slot->kobj,
 484                                   &hotplug_slot_attr_cur_bus_speed.attr);
 485 exit_cur_speed:
 486         if (has_max_bus_speed_file(slot))
 487                 sysfs_remove_file(&slot->kobj,
 488                                   &hotplug_slot_attr_max_bus_speed.attr);
 489 exit_max_speed:
 490         if (has_adapter_file(slot))
 491                 sysfs_remove_file(&slot->kobj,
 492                                   &hotplug_slot_attr_presence.attr);
 493 exit_adapter:
 494         if (has_latch_file(slot))
 495                 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
 496 exit_latch:
 497         if (has_attention_file(slot))
 498                 sysfs_remove_file(&slot->kobj,
 499                                   &hotplug_slot_attr_attention.attr);
 500 exit_attention:
 501         if (has_power_file(slot))
 502                 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
 503 exit_power:
 504         pci_hp_remove_module_link(slot);
 505 exit:
 506         return retval;
 507 }
 508
 509 static void fs_remove_slot(struct pci_slot *slot)
 510 {
 511         if (has_power_file(slot))
 512                 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_power.attr);
 513
 514         if (has_attention_file(slot))
 515                 sysfs_remove_file(&slot->kobj,
 516                                   &hotplug_slot_attr_attention.attr);
 517
 518         if (has_latch_file(slot))
 519                 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_latch.attr);
 520
 521         if (has_adapter_file(slot))
 522                 sysfs_remove_file(&slot->kobj,
 523                                   &hotplug_slot_attr_presence.attr);
 524
 525         if (has_max_bus_speed_file(slot))
 526                 sysfs_remove_file(&slot->kobj,
 527                                   &hotplug_slot_attr_max_bus_speed.attr);
 528
 529         if (has_cur_bus_speed_file(slot))
 530                 sysfs_remove_file(&slot->kobj,
 531                                   &hotplug_slot_attr_cur_bus_speed.attr);
 532
 533         if (has_test_file(slot))
 534                 sysfs_remove_file(&slot->kobj, &hotplug_slot_attr_test.attr);
 535
 536         pci_hp_remove_module_link(slot);
 537 }
 538
 539 static struct hotplug_slot *get_slot_from_name (const char *name)
 540 {
 541         struct hotplug_slot *slot;
 542         struct list_head *tmp;
 543
 544         list_for_each (tmp, &pci_hotplug_slot_list) {
 545                 slot = list_entry (tmp, struct hotplug_slot, slot_list);
 546                 if (strcmp(hotplug_slot_name(slot), name) == 0)
 547                         return slot;
 548         }
 549         return NULL;
 550 }
 551
 552 /**
 553  * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem
 554  * @bus: bus this slot is on
 555  * @slot: pointer to the &struct hotplug_slot to register
 556  * @devnr: device number
 557  * @name: name registered with kobject core
 558  * @owner: caller module owner
 559  * @mod_name: caller module name
 560  *
 561  * Registers a hotplug slot with the pci hotplug subsystem, which will allow
 562  * userspace interaction to the slot.
 563  *
 564  * Returns 0 if successful, anything else for an error.
 565  */
 566 int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus,
 567                       int devnr, const char *name,
 568                       struct module *owner, const char *mod_name)
 569 {
 570         int result;
 571         struct pci_slot *pci_slot;
 572
 573         if (slot == NULL)
 574                 return -ENODEV;
 575         if ((slot->info == NULL) || (slot->ops == NULL))
 576                 return -EINVAL;
 577         if (slot->release == NULL) {
 578                 dbg("Why are you trying to register a hotplug slot "
 579                     "without a proper release function?\n");
 580                 return -EINVAL;
 581         }
 582
 583         slot->ops->owner = owner;
 584         slot->ops->mod_name = mod_name;
 585
 586         mutex_lock(&pci_hp_mutex);
 587         /*
 588          * No problems if we call this interface from both ACPI_PCI_SLOT
 589          * driver and call it here again. If we've already created the
 590          * pci_slot, the interface will simply bump the refcount.
 591          */
 592         pci_slot = pci_create_slot(bus, devnr, name, slot);
 593         if (IS_ERR(pci_slot)) {
 594                 result = PTR_ERR(pci_slot);
 595                 goto out;
 596         }
 597
 598         slot->pci_slot = pci_slot;
 599         pci_slot->hotplug = slot;
 600
 601         list_add(&slot->slot_list, &pci_hotplug_slot_list);
 602
 603         result = fs_add_slot(pci_slot);
 604         kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
 605         dbg("Added slot %s to the list\n", name);
 606 out:
 607         mutex_unlock(&pci_hp_mutex);
 608         return result;
 609 }
 610
 611 /**
 612  * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem
 613  * @hotplug: pointer to the &struct hotplug_slot to deregister
 614  *
 615  * The @slot must have been registered with the pci hotplug subsystem
 616  * previously with a call to pci_hp_register().
 617  *
 618  * Returns 0 if successful, anything else for an error.
 619  */
 620 int pci_hp_deregister(struct hotplug_slot *hotplug)
 621 {
 622         struct hotplug_slot *temp;
 623         struct pci_slot *slot;
 624
 625         if (!hotplug)
 626                 return -ENODEV;
 627
 628         mutex_lock(&pci_hp_mutex);
 629         temp = get_slot_from_name(hotplug_slot_name(hotplug));
 630         if (temp != hotplug) {
 631                 mutex_unlock(&pci_hp_mutex);
 632                 return -ENODEV;
 633         }
 634
 635         list_del(&hotplug->slot_list);
 636
 637         slot = hotplug->pci_slot;
 638         fs_remove_slot(slot);
 639         dbg("Removed slot %s from the list\n", hotplug_slot_name(hotplug));
 640
 641         hotplug->release(hotplug);
 642         slot->hotplug = NULL;
 643         pci_destroy_slot(slot);
 644         mutex_unlock(&pci_hp_mutex);
 645
 646         return 0;
 647 }
 648
 649 /**
 650  * pci_hp_change_slot_info - changes the slot's information structure in the core
 651  * @hotplug: pointer to the slot whose info has changed
 652  * @info: pointer to the info copy into the slot's info structure
 653  *
 654  * @slot must have been registered with the pci
 655  * hotplug subsystem previously with a call to pci_hp_register().
 656  *
 657  * Returns 0 if successful, anything else for an error.
 658  */
 659 int __must_check pci_hp_change_slot_info(struct hotplug_slot *hotplug,
 660                                          struct hotplug_slot_info *info)
 661 {
 662         struct pci_slot *slot;
 663         if (!hotplug || !info)
 664                 return -ENODEV;
 665         slot = hotplug->pci_slot;
 666
 667         memcpy(hotplug->info, info, sizeof(struct hotplug_slot_info));
 668
 669         return 0;
 670 }
 671
 672 static int __init pci_hotplug_init (void)
 673 {
 674         int result;
 675
 676         result = cpci_hotplug_init(debug);
 677         if (result) {
 678                 err ("cpci_hotplug_init with error %d\n", result);
 679                 goto err_cpci;
 680         }
 681
 682         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
 683
 684 err_cpci:
 685         return result;
 686 }
 687
 688 static void __exit pci_hotplug_exit (void)
 689 {
 690         cpci_hotplug_exit();
 691 }
 692
 693 module_init(pci_hotplug_init);
 694 module_exit(pci_hotplug_exit);
 695
 696 MODULE_AUTHOR(DRIVER_AUTHOR);
 697 MODULE_DESCRIPTION(DRIVER_DESC);
 698 MODULE_LICENSE("GPL");
 699 module_param(debug, bool, 0644);
 700 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
 701
 702 EXPORT_SYMBOL_GPL(__pci_hp_register);
 703 EXPORT_SYMBOL_GPL(pci_hp_deregister);
 704 EXPORT_SYMBOL_GPL(pci_hp_change_slot_info);