drivers/pci/hotplug/pciehp_core.c

   1 /*
   2  * PCI Express Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   6  * Copyright (C) 2001 IBM Corp.
   7  * Copyright (C) 2003-2004 Intel Corporation
   8  *
   9  * All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  19  * NON INFRINGEMENT.  See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
  27  *
  28  */
  29
  30 #include <linux/config.h>
  31 #include <linux/module.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/kernel.h>
  34 #include <linux/types.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/miscdevice.h>
  37 #include <linux/slab.h>
  38 #include <linux/workqueue.h>
  39 #include <linux/pci.h>
  40 #include <linux/init.h>
  41 #include <asm/uaccess.h>
  42 #include "pciehp.h"
  43 #include "pciehprm.h"
  44
  45 /* Global variables */
  46 int pciehp_debug;
  47 int pciehp_poll_mode;
  48 int pciehp_poll_time;
  49 struct controller *pciehp_ctrl_list;
  50 struct pci_func *pciehp_slot_list[256];
  51
  52 #define DRIVER_VERSION  "0.4"
  53 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
  54 #define DRIVER_DESC     "PCI Express Hot Plug Controller Driver"
  55
  56 MODULE_AUTHOR(DRIVER_AUTHOR);
  57 MODULE_DESCRIPTION(DRIVER_DESC);
  58 MODULE_LICENSE("GPL");
  59
  60 module_param(pciehp_debug, bool, 0644);
  61 module_param(pciehp_poll_mode, bool, 0644);
  62 module_param(pciehp_poll_time, int, 0644);
  63 MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not");
  64 MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not");
  65 MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds");
  66
  67 #define PCIE_MODULE_NAME "pciehp"
  68
  69 static int pcie_start_thread (void);
  70 static int set_attention_status (struct hotplug_slot *slot, u8 value);
  71 static int enable_slot          (struct hotplug_slot *slot);
  72 static int disable_slot         (struct hotplug_slot *slot);
  73 static int get_power_status     (struct hotplug_slot *slot, u8 *value);
  74 static int get_attention_status (struct hotplug_slot *slot, u8 *value);
  75 static int get_latch_status     (struct hotplug_slot *slot, u8 *value);
  76 static int get_adapter_status   (struct hotplug_slot *slot, u8 *value);
  77 static int get_max_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  78 static int get_cur_bus_speed    (struct hotplug_slot *slot, enum pci_bus_speed *value);
  79
  80 static struct hotplug_slot_ops pciehp_hotplug_slot_ops = {
  81         .owner =                THIS_MODULE,
  82         .set_attention_status = set_attention_status,
  83         .enable_slot =          enable_slot,
  84         .disable_slot =         disable_slot,
  85         .get_power_status =     get_power_status,
  86         .get_attention_status = get_attention_status,
  87         .get_latch_status =     get_latch_status,
  88         .get_adapter_status =   get_adapter_status,
  89         .get_max_bus_speed =    get_max_bus_speed,
  90         .get_cur_bus_speed =    get_cur_bus_speed,
  91 };
  92
  93 static int init_slots(struct controller *ctrl)
  94 {
  95         struct slot *new_slot;
  96         u8 number_of_slots;
  97         u8 slot_device;
  98         u32 slot_number;
  99         int result = -ENOMEM;
 100
 101         dbg("%s\n",__FUNCTION__);
 102
 103         number_of_slots = ctrl->num_slots;
 104         slot_device = ctrl->slot_device_offset;
 105         slot_number = ctrl->first_slot;
 106
 107         while (number_of_slots) {
 108                 new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL);
 109                 if (!new_slot)
 110                         goto error;
 111
 112                 memset(new_slot, 0, sizeof(struct slot));
 113                 new_slot->hotplug_slot =
 114                                 kmalloc(sizeof(*(new_slot->hotplug_slot)),
 115                                                 GFP_KERNEL);
 116                 if (!new_slot->hotplug_slot)
 117                         goto error_slot;
 118                 memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot));
 119
 120                 new_slot->hotplug_slot->info =
 121                         kmalloc(sizeof(*(new_slot->hotplug_slot->info)),
 122                                                 GFP_KERNEL);
 123                 if (!new_slot->hotplug_slot->info)
 124                         goto error_hpslot;
 125                 memset(new_slot->hotplug_slot->info, 0,
 126                                         sizeof(struct hotplug_slot_info));
 127                 new_slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE,
 128                                                 GFP_KERNEL);
 129                 if (!new_slot->hotplug_slot->name)
 130                         goto error_info;
 131
 132                 new_slot->ctrl = ctrl;
 133                 new_slot->bus = ctrl->slot_bus;
 134                 new_slot->device = slot_device;
 135                 new_slot->hpc_ops = ctrl->hpc_ops;
 136
 137                 new_slot->number = ctrl->first_slot;
 138                 new_slot->hp_slot = slot_device - ctrl->slot_device_offset;
 139
 140                 /* register this slot with the hotplug pci core */
 141                 new_slot->hotplug_slot->private = new_slot;
 142                 make_slot_name (new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot);
 143                 new_slot->hotplug_slot->ops = &pciehp_hotplug_slot_ops;
 144
 145                 new_slot->hpc_ops->get_power_status(new_slot, &(new_slot->hotplug_slot->info->power_status));
 146                 new_slot->hpc_ops->get_attention_status(new_slot, &(new_slot->hotplug_slot->info->attention_status));
 147                 new_slot->hpc_ops->get_latch_status(new_slot, &(new_slot->hotplug_slot->info->latch_status));
 148                 new_slot->hpc_ops->get_adapter_status(new_slot, &(new_slot->hotplug_slot->info->adapter_status));
 149
 150                 dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x slot_device_offset=%x\n",
 151                         new_slot->bus, new_slot->device, new_slot->hp_slot, new_slot->number, ctrl->slot_device_offset);
 152                 result = pci_hp_register (new_slot->hotplug_slot);
 153                 if (result) {
 154                         err ("pci_hp_register failed with error %d\n", result);
 155                         goto error_name;
 156                 }
 157
 158                 new_slot->next = ctrl->slot;
 159                 ctrl->slot = new_slot;
 160
 161                 number_of_slots--;
 162                 slot_device++;
 163                 slot_number += ctrl->slot_num_inc;
 164         }
 165
 166         return 0;
 167
 168 error_name:
 169         kfree(new_slot->hotplug_slot->name);
 170 error_info:
 171         kfree(new_slot->hotplug_slot->info);
 172 error_hpslot:
 173         kfree(new_slot->hotplug_slot);
 174 error_slot:
 175         kfree(new_slot);
 176 error:
 177         return result;
 178 }
 179
 180
 181 static int cleanup_slots (struct controller * ctrl)
 182 {
 183         struct slot *old_slot, *next_slot;
 184
 185         old_slot = ctrl->slot;
 186         ctrl->slot = NULL;
 187
 188         while (old_slot) {
 189                 next_slot = old_slot->next;
 190                 pci_hp_deregister (old_slot->hotplug_slot);
 191                 kfree(old_slot->hotplug_slot->info);
 192                 kfree(old_slot->hotplug_slot->name);
 193                 kfree(old_slot->hotplug_slot);
 194                 kfree(old_slot);
 195                 old_slot = next_slot;
 196         }
 197
 198
 199         return(0);
 200 }
 201
 202 static int get_ctlr_slot_config(struct controller *ctrl)
 203 {
 204         int num_ctlr_slots;             /* Not needed; PCI Express has 1 slot per port*/
 205         int first_device_num;           /* Not needed */
 206         int physical_slot_num;
 207         int updown;                     /* Not needed */
 208         int rc;
 209         int flags;                      /* Not needed */
 210
 211         rc = pcie_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, &updown, &flags);
 212         if (rc) {
 213                 err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__, ctrl->bus, ctrl->device);
 214                 return (-1);
 215         }
 216
 217         ctrl->num_slots = num_ctlr_slots;       /* PCI Express has 1 slot per port */
 218         ctrl->slot_device_offset = first_device_num;
 219         ctrl->first_slot = physical_slot_num;
 220         ctrl->slot_num_inc = updown;    /* Not needed */                /* either -1 or 1 */
 221
 222         dbg("%s: bus(0x%x) num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d (%x:%x)\n",
 223                 __FUNCTION__, ctrl->slot_bus, num_ctlr_slots, first_device_num, physical_slot_num, updown,
 224                 ctrl->bus, ctrl->device);
 225
 226         return (0);
 227 }
 228
 229
 230 /*
 231  * set_attention_status - Turns the Amber LED for a slot on, off or blink
 232  */
 233 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
 234 {
 235         struct slot *slot = hotplug_slot->private;
 236
 237         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 238
 239         hotplug_slot->info->attention_status = status;
 240         slot->hpc_ops->set_attention_status(slot, status);
 241
 242         return 0;
 243 }
 244
 245
 246 static int enable_slot(struct hotplug_slot *hotplug_slot)
 247 {
 248         struct slot *slot = hotplug_slot->private;
 249
 250         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 251
 252         return pciehp_enable_slot(slot);
 253 }
 254
 255
 256 static int disable_slot(struct hotplug_slot *hotplug_slot)
 257 {
 258         struct slot *slot = hotplug_slot->private;
 259
 260         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 261
 262         return pciehp_disable_slot(slot);
 263 }
 264
 265 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
 266 {
 267         struct slot *slot = hotplug_slot->private;
 268         int retval;
 269
 270         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 271
 272         retval = slot->hpc_ops->get_power_status(slot, value);
 273         if (retval < 0)
 274                 *value = hotplug_slot->info->power_status;
 275
 276         return 0;
 277 }
 278
 279 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
 280 {
 281         struct slot *slot = hotplug_slot->private;
 282         int retval;
 283
 284         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 285
 286         retval = slot->hpc_ops->get_attention_status(slot, value);
 287         if (retval < 0)
 288                 *value = hotplug_slot->info->attention_status;
 289
 290         return 0;
 291 }
 292
 293 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
 294 {
 295         struct slot *slot = hotplug_slot->private;
 296         int retval;
 297
 298         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 299
 300         retval = slot->hpc_ops->get_latch_status(slot, value);
 301         if (retval < 0)
 302                 *value = hotplug_slot->info->latch_status;
 303
 304         return 0;
 305 }
 306
 307 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
 308 {
 309         struct slot *slot = hotplug_slot->private;
 310         int retval;
 311
 312         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 313
 314         retval = slot->hpc_ops->get_adapter_status(slot, value);
 315         if (retval < 0)
 316                 *value = hotplug_slot->info->adapter_status;
 317
 318         return 0;
 319 }
 320
 321 static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 322 {
 323         struct slot *slot = hotplug_slot->private;
 324         int retval;
 325
 326         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 327
 328         retval = slot->hpc_ops->get_max_bus_speed(slot, value);
 329         if (retval < 0)
 330                 *value = PCI_SPEED_UNKNOWN;
 331
 332         return 0;
 333 }
 334
 335 static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
 336 {
 337         struct slot *slot = hotplug_slot->private;
 338         int retval;
 339
 340         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 341
 342         retval = slot->hpc_ops->get_cur_bus_speed(slot, value);
 343         if (retval < 0)
 344                 *value = PCI_SPEED_UNKNOWN;
 345
 346         return 0;
 347 }
 348
 349 static int pcie_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 350 {
 351         int rc;
 352         struct controller *ctrl;
 353         struct slot *t_slot;
 354         int first_device_num = 0 ;      /* first PCI device number supported by this PCIE */
 355         int num_ctlr_slots;             /* number of slots supported by this HPC */
 356         u8 value;
 357
 358         ctrl = kmalloc(sizeof(*ctrl), GFP_KERNEL);
 359         if (!ctrl) {
 360                 err("%s : out of memory\n", __FUNCTION__);
 361                 goto err_out_none;
 362         }
 363         memset(ctrl, 0, sizeof(struct controller));
 364
 365         dbg("%s: DRV_thread pid = %d\n", __FUNCTION__, current->pid);
 366
 367         rc = pcie_init(ctrl, pdev,
 368                 (php_intr_callback_t) pciehp_handle_attention_button,
 369                 (php_intr_callback_t) pciehp_handle_switch_change,
 370                 (php_intr_callback_t) pciehp_handle_presence_change,
 371                 (php_intr_callback_t) pciehp_handle_power_fault);
 372         if (rc) {
 373                 dbg("%s: controller initialization failed\n", PCIE_MODULE_NAME);
 374                 goto err_out_free_ctrl;
 375         }
 376
 377         ctrl->pci_dev = pdev;
 378
 379         pci_set_drvdata(pdev, ctrl);
 380
 381         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
 382         if (!ctrl->pci_bus) {
 383                 err("%s: out of memory\n", __FUNCTION__);
 384                 rc = -ENOMEM;
 385                 goto err_out_unmap_mmio_region;
 386         }
 387         dbg("%s: ctrl->pci_bus %p\n", __FUNCTION__, ctrl->pci_bus);
 388         memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus));
 389         ctrl->bus = pdev->bus->number;  /* ctrl bus */
 390         ctrl->slot_bus = pdev->subordinate->number;  /* bus controlled by this HPC */
 391
 392         ctrl->device = PCI_SLOT(pdev->devfn);
 393         ctrl->function = PCI_FUNC(pdev->devfn);
 394         dbg("%s: ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", __FUNCTION__,
 395                 ctrl->bus, ctrl->device, ctrl->function, pdev->irq);
 396
 397         /*
 398          *      Save configuration headers for this and subordinate PCI buses
 399          */
 400
 401         rc = get_ctlr_slot_config(ctrl);
 402         if (rc) {
 403                 err(msg_initialization_err, rc);
 404                 goto err_out_free_ctrl_bus;
 405         }
 406         first_device_num = ctrl->slot_device_offset;
 407         num_ctlr_slots = ctrl->num_slots;
 408
 409         /* Store PCI Config Space for all devices on this bus */
 410         dbg("%s: Before calling pciehp_save_config, ctrl->bus %x,ctrl->slot_bus %x\n",
 411                 __FUNCTION__,ctrl->bus, ctrl->slot_bus);
 412         rc = pciehp_save_config(ctrl, ctrl->slot_bus, num_ctlr_slots, first_device_num);
 413         if (rc) {
 414                 err("%s: unable to save PCI configuration data, error %d\n", __FUNCTION__, rc);
 415                 goto err_out_free_ctrl_bus;
 416         }
 417
 418         /* Get IO, memory, and IRQ resources for new devices */
 419         rc = pciehprm_find_available_resources(ctrl);
 420         ctrl->add_support = !rc;
 421
 422         if (rc) {
 423                 dbg("pciehprm_find_available_resources = %#x\n", rc);
 424                 err("unable to locate PCI configuration resources for hot plug add.\n");
 425                 goto err_out_free_ctrl_bus;
 426         }
 427
 428         /* Setup the slot information structures */
 429         rc = init_slots(ctrl);
 430         if (rc) {
 431                 err(msg_initialization_err, 6);
 432                 goto err_out_free_ctrl_slot;
 433         }
 434
 435         t_slot = pciehp_find_slot(ctrl, first_device_num);
 436         dbg("%s: t_slot %p\n", __FUNCTION__, t_slot);
 437
 438         /*      Finish setting up the hot plug ctrl device */
 439         ctrl->next_event = 0;
 440
 441         if (!pciehp_ctrl_list) {
 442                 pciehp_ctrl_list = ctrl;
 443                 ctrl->next = NULL;
 444         } else {
 445                 ctrl->next = pciehp_ctrl_list;
 446                 pciehp_ctrl_list = ctrl;
 447         }
 448
 449         /* Wait for exclusive access to hardware */
 450         down(&ctrl->crit_sect);
 451
 452         t_slot->hpc_ops->get_adapter_status(t_slot, &value); /* Check if slot is occupied */
 453         dbg("%s: adpater value %x\n", __FUNCTION__, value);
 454         if (!value) {
 455                 rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/
 456                 if (rc) {
 457                         /* Done with exclusive hardware access */
 458                         up(&ctrl->crit_sect);
 459                         goto err_out_free_ctrl_slot;
 460                 } else
 461                         /* Wait for the command to complete */
 462                         wait_for_ctrl_irq (ctrl);
 463         }
 464
 465         /* Done with exclusive hardware access */
 466         up(&ctrl->crit_sect);
 467
 468         return 0;
 469
 470 err_out_free_ctrl_slot:
 471         cleanup_slots(ctrl);
 472 err_out_free_ctrl_bus:
 473         kfree(ctrl->pci_bus);
 474 err_out_unmap_mmio_region:
 475         ctrl->hpc_ops->release_ctlr(ctrl);
 476 err_out_free_ctrl:
 477         kfree(ctrl);
 478 err_out_none:
 479         return -ENODEV;
 480 }
 481
 482
 483 static int pcie_start_thread(void)
 484 {
 485         int loop;
 486         int retval = 0;
 487
 488         dbg("Initialize + Start the notification/polling mechanism \n");
 489
 490         retval = pciehp_event_start_thread();
 491         if (retval) {
 492                 dbg("pciehp_event_start_thread() failed\n");
 493                 return retval;
 494         }
 495
 496         dbg("Initialize slot lists\n");
 497         /* One slot list for each bus in the system */
 498         for (loop = 0; loop < 256; loop++) {
 499                 pciehp_slot_list[loop] = NULL;
 500         }
 501
 502         return retval;
 503 }
 504
 505 static inline void __exit
 506 free_pciehp_res(struct pci_resource *res)
 507 {
 508         struct pci_resource *tres;
 509
 510         while (res) {
 511                 tres = res;
 512                 res = res->next;
 513                 kfree(tres);
 514         }
 515 }
 516
 517 static void __exit unload_pciehpd(void)
 518 {
 519         struct pci_func *next;
 520         struct pci_func *TempSlot;
 521         int loop;
 522         struct controller *ctrl;
 523         struct controller *tctrl;
 524
 525         ctrl = pciehp_ctrl_list;
 526
 527         while (ctrl) {
 528                 cleanup_slots(ctrl);
 529
 530                 free_pciehp_res(ctrl->io_head);
 531                 free_pciehp_res(ctrl->mem_head);
 532                 free_pciehp_res(ctrl->p_mem_head);
 533                 free_pciehp_res(ctrl->bus_head);
 534
 535                 kfree (ctrl->pci_bus);
 536
 537                 ctrl->hpc_ops->release_ctlr(ctrl);
 538
 539                 tctrl = ctrl;
 540                 ctrl = ctrl->next;
 541
 542                 kfree(tctrl);
 543         }
 544
 545         for (loop = 0; loop < 256; loop++) {
 546                 next = pciehp_slot_list[loop];
 547                 while (next != NULL) {
 548                         free_pciehp_res(next->io_head);
 549                         free_pciehp_res(next->mem_head);
 550                         free_pciehp_res(next->p_mem_head);
 551                         free_pciehp_res(next->bus_head);
 552
 553                         TempSlot = next;
 554                         next = next->next;
 555                         kfree(TempSlot);
 556                 }
 557         }
 558
 559         /* Stop the notification mechanism */
 560         pciehp_event_stop_thread();
 561
 562 }
 563
 564
 565 static struct pci_device_id pcied_pci_tbl[] = {
 566         {
 567         .class =        ((PCI_CLASS_BRIDGE_PCI << 8) | 0x00),
 568         .class_mask =   ~0,
 569         .vendor =       PCI_ANY_ID,
 570         .device =       PCI_ANY_ID,
 571         .subvendor =    PCI_ANY_ID,
 572         .subdevice =    PCI_ANY_ID,
 573         },
 574
 575         { /* end: all zeroes */ }
 576 };
 577
 578 MODULE_DEVICE_TABLE(pci, pcied_pci_tbl);
 579
 580
 581
 582 static struct pci_driver pcie_driver = {
 583         .name           =       PCIE_MODULE_NAME,
 584         .id_table       =       pcied_pci_tbl,
 585         .probe          =       pcie_probe,
 586         /* remove:      pcie_remove_one, */
 587 };
 588
 589
 590
 591 static int __init pcied_init(void)
 592 {
 593         int retval = 0;
 594
 595 #ifdef CONFIG_HOTPLUG_PCI_PCIE_POLL_EVENT_MODE
 596         pciehp_poll_mode = 1;
 597 #endif
 598
 599         retval = pcie_start_thread();
 600         if (retval)
 601                 goto error_hpc_init;
 602
 603         retval = pciehprm_init(PCI);
 604         if (!retval) {
 605                 retval = pci_module_init(&pcie_driver);
 606                 dbg("pci_module_init = %d\n", retval);
 607                 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
 608         }
 609
 610 error_hpc_init:
 611         if (retval) {
 612                 pciehprm_cleanup();
 613                 pciehp_event_stop_thread();
 614         } else
 615                 pciehprm_print_pirt();
 616
 617         return retval;
 618 }
 619
 620 static void __exit pcied_cleanup(void)
 621 {
 622         dbg("unload_pciehpd()\n");
 623         unload_pciehpd();
 624
 625         pciehprm_cleanup();
 626
 627         dbg("pci_unregister_driver\n");
 628         pci_unregister_driver(&pcie_driver);
 629
 630         info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n");
 631 }
 632
 633 module_init(pcied_init);
 634 module_exit(pcied_cleanup);