drivers/gpu/drm/radeon/radeon_drv.c

   1 /**
   2  * \file radeon_drv.c
   3  * ATI Radeon driver
   4  *
   5  * \author Gareth Hughes <gareth@valinux.com>
   6  */
   7
   8 /*
   9  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
  10  * All Rights Reserved.
  11  *
  12  * Permission is hereby granted, free of charge, to any person obtaining a
  13  * copy of this software and associated documentation files (the "Software"),
  14  * to deal in the Software without restriction, including without limitation
  15  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  16  * and/or sell copies of the Software, and to permit persons to whom the
  17  * Software is furnished to do so, subject to the following conditions:
  18  *
  19  * The above copyright notice and this permission notice (including the next
  20  * paragraph) shall be included in all copies or substantial portions of the
  21  * Software.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  24  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  25  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  26  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  27  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  28  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  29  * OTHER DEALINGS IN THE SOFTWARE.
  30  */
  31
  32 #include <drm/drmP.h>
  33 #include <drm/radeon_drm.h>
  34 #include "radeon_drv.h"
  35
  36 #include <drm/drm_pciids.h>
  37 #include <linux/console.h>
  38 #include <linux/module.h>
  39
  40
  41 /*
  42  * KMS wrapper.
  43  * - 2.0.0 - initial interface
  44  * - 2.1.0 - add square tiling interface
  45  * - 2.2.0 - add r6xx/r7xx const buffer support
  46  * - 2.3.0 - add MSPOS + 3D texture + r500 VAP regs
  47  * - 2.4.0 - add crtc id query
  48  * - 2.5.0 - add get accel 2 to work around ddx breakage for evergreen
  49  * - 2.6.0 - add tiling config query (r6xx+), add initial HiZ support (r300->r500)
  50  *   2.7.0 - fixups for r600 2D tiling support. (no external ABI change), add eg dyn gpr regs
  51  *   2.8.0 - pageflip support, r500 US_FORMAT regs. r500 ARGB2101010 colorbuf, r300->r500 CMASK, clock crystal query
  52  *   2.9.0 - r600 tiling (s3tc,rgtc) working, SET_PREDICATION packet 3 on r600 + eg, backend query
  53  *   2.10.0 - fusion 2D tiling
  54  *   2.11.0 - backend map, initial compute support for the CS checker
  55  *   2.12.0 - RADEON_CS_KEEP_TILING_FLAGS
  56  *   2.13.0 - virtual memory support, streamout
  57  *   2.14.0 - add evergreen tiling informations
  58  *   2.15.0 - add max_pipes query
  59  *   2.16.0 - fix evergreen 2D tiled surface calculation
  60  *   2.17.0 - add STRMOUT_BASE_UPDATE for r7xx
  61  *   2.18.0 - r600-eg: allow "invalid" DB formats
  62  *   2.19.0 - r600-eg: MSAA textures
  63  *   2.20.0 - r600-si: RADEON_INFO_TIMESTAMP query
  64  *   2.21.0 - r600-r700: FMASK and CMASK
  65  *   2.22.0 - r600 only: RESOLVE_BOX allowed
  66  *   2.23.0 - allow STRMOUT_BASE_UPDATE on RS780 and RS880
  67  *   2.24.0 - eg only: allow MIP_ADDRESS=0 for MSAA textures
  68  *   2.25.0 - eg+: new info request for num SE and num SH
  69  *   2.26.0 - r600-eg: fix htile size computation
  70  *   2.27.0 - r600-SI: Add CS ioctl support for async DMA
  71  *   2.28.0 - r600-eg: Add MEM_WRITE packet support
  72  *   2.29.0 - R500 FP16 color clear registers
  73  *   2.30.0 - fix for FMASK texturing
  74  *   2.31.0 - Add fastfb support for rs690
  75  *   2.32.0 - new info request for rings working
  76  *   2.33.0 - Add SI tiling mode array query
  77  *   2.34.0 - Add CIK tiling mode array query
  78  */
  79 #define KMS_DRIVER_MAJOR        2
  80 #define KMS_DRIVER_MINOR        34
  81 #define KMS_DRIVER_PATCHLEVEL   0
  82 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags);
  83 int radeon_driver_unload_kms(struct drm_device *dev);
  84 void radeon_driver_lastclose_kms(struct drm_device *dev);
  85 int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv);
  86 void radeon_driver_postclose_kms(struct drm_device *dev,
  87                                  struct drm_file *file_priv);
  88 void radeon_driver_preclose_kms(struct drm_device *dev,
  89                                 struct drm_file *file_priv);
  90 int radeon_suspend_kms(struct drm_device *dev, pm_message_t state);
  91 int radeon_resume_kms(struct drm_device *dev);
  92 u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc);
  93 int radeon_enable_vblank_kms(struct drm_device *dev, int crtc);
  94 void radeon_disable_vblank_kms(struct drm_device *dev, int crtc);
  95 int radeon_get_vblank_timestamp_kms(struct drm_device *dev, int crtc,
  96                                     int *max_error,
  97                                     struct timeval *vblank_time,
  98                                     unsigned flags);
  99 void radeon_driver_irq_preinstall_kms(struct drm_device *dev);
 100 int radeon_driver_irq_postinstall_kms(struct drm_device *dev);
 101 void radeon_driver_irq_uninstall_kms(struct drm_device *dev);
 102 irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS);
 103 int radeon_gem_object_init(struct drm_gem_object *obj);
 104 void radeon_gem_object_free(struct drm_gem_object *obj);
 105 int radeon_gem_object_open(struct drm_gem_object *obj,
 106                                 struct drm_file *file_priv);
 107 void radeon_gem_object_close(struct drm_gem_object *obj,
 108                                 struct drm_file *file_priv);
 109 extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
 110                                       int *vpos, int *hpos);
 111 extern const struct drm_ioctl_desc radeon_ioctls_kms[];
 112 extern int radeon_max_kms_ioctl;
 113 int radeon_mmap(struct file *filp, struct vm_area_struct *vma);
 114 int radeon_mode_dumb_mmap(struct drm_file *filp,
 115                           struct drm_device *dev,
 116                           uint32_t handle, uint64_t *offset_p);
 117 int radeon_mode_dumb_create(struct drm_file *file_priv,
 118                             struct drm_device *dev,
 119                             struct drm_mode_create_dumb *args);
 120 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj);
 121 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
 122                                                         size_t size,
 123                                                         struct sg_table *sg);
 124 int radeon_gem_prime_pin(struct drm_gem_object *obj);
 125 void radeon_gem_prime_unpin(struct drm_gem_object *obj);
 126 void *radeon_gem_prime_vmap(struct drm_gem_object *obj);
 127 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
 128 extern long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd,
 129                                     unsigned long arg);
 130
 131 #if defined(CONFIG_DEBUG_FS)
 132 int radeon_debugfs_init(struct drm_minor *minor);
 133 void radeon_debugfs_cleanup(struct drm_minor *minor);
 134 #endif
 135
 136 /* atpx handler */
 137 #if defined(CONFIG_VGA_SWITCHEROO)
 138 void radeon_register_atpx_handler(void);
 139 void radeon_unregister_atpx_handler(void);
 140 #else
 141 static inline void radeon_register_atpx_handler(void) {}
 142 static inline void radeon_unregister_atpx_handler(void) {}
 143 #endif
 144
 145 int radeon_no_wb;
 146 int radeon_modeset = -1;
 147 int radeon_dynclks = -1;
 148 int radeon_r4xx_atom = 0;
 149 int radeon_agpmode = 0;
 150 int radeon_vram_limit = 0;
 151 int radeon_gart_size = 512; /* default gart size */
 152 int radeon_benchmarking = 0;
 153 int radeon_testing = 0;
 154 int radeon_connector_table = 0;
 155 int radeon_tv = 1;
 156 int radeon_audio = 0;
 157 int radeon_disp_priority = 0;
 158 int radeon_hw_i2c = 0;
 159 int radeon_pcie_gen2 = -1;
 160 int radeon_msi = -1;
 161 int radeon_lockup_timeout = 10000;
 162 int radeon_fastfb = 0;
 163 int radeon_dpm = -1;
 164 int radeon_aspm = -1;
 165
 166 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
 167 module_param_named(no_wb, radeon_no_wb, int, 0444);
 168
 169 MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
 170 module_param_named(modeset, radeon_modeset, int, 0400);
 171
 172 MODULE_PARM_DESC(dynclks, "Disable/Enable dynamic clocks");
 173 module_param_named(dynclks, radeon_dynclks, int, 0444);
 174
 175 MODULE_PARM_DESC(r4xx_atom, "Enable ATOMBIOS modesetting for R4xx");
 176 module_param_named(r4xx_atom, radeon_r4xx_atom, int, 0444);
 177
 178 MODULE_PARM_DESC(vramlimit, "Restrict VRAM for testing");
 179 module_param_named(vramlimit, radeon_vram_limit, int, 0600);
 180
 181 MODULE_PARM_DESC(agpmode, "AGP Mode (-1 == PCI)");
 182 module_param_named(agpmode, radeon_agpmode, int, 0444);
 183
 184 MODULE_PARM_DESC(gartsize, "Size of PCIE/IGP gart to setup in megabytes (32, 64, etc)");
 185 module_param_named(gartsize, radeon_gart_size, int, 0600);
 186
 187 MODULE_PARM_DESC(benchmark, "Run benchmark");
 188 module_param_named(benchmark, radeon_benchmarking, int, 0444);
 189
 190 MODULE_PARM_DESC(test, "Run tests");
 191 module_param_named(test, radeon_testing, int, 0444);
 192
 193 MODULE_PARM_DESC(connector_table, "Force connector table");
 194 module_param_named(connector_table, radeon_connector_table, int, 0444);
 195
 196 MODULE_PARM_DESC(tv, "TV enable (0 = disable)");
 197 module_param_named(tv, radeon_tv, int, 0444);
 198
 199 MODULE_PARM_DESC(audio, "Audio enable (1 = enable)");
 200 module_param_named(audio, radeon_audio, int, 0444);
 201
 202 MODULE_PARM_DESC(disp_priority, "Display Priority (0 = auto, 1 = normal, 2 = high)");
 203 module_param_named(disp_priority, radeon_disp_priority, int, 0444);
 204
 205 MODULE_PARM_DESC(hw_i2c, "hw i2c engine enable (0 = disable)");
 206 module_param_named(hw_i2c, radeon_hw_i2c, int, 0444);
 207
 208 MODULE_PARM_DESC(pcie_gen2, "PCIE Gen2 mode (-1 = auto, 0 = disable, 1 = enable)");
 209 module_param_named(pcie_gen2, radeon_pcie_gen2, int, 0444);
 210
 211 MODULE_PARM_DESC(msi, "MSI support (1 = enable, 0 = disable, -1 = auto)");
 212 module_param_named(msi, radeon_msi, int, 0444);
 213
 214 MODULE_PARM_DESC(lockup_timeout, "GPU lockup timeout in ms (defaul 10000 = 10 seconds, 0 = disable)");
 215 module_param_named(lockup_timeout, radeon_lockup_timeout, int, 0444);
 216
 217 MODULE_PARM_DESC(fastfb, "Direct FB access for IGP chips (0 = disable, 1 = enable)");
 218 module_param_named(fastfb, radeon_fastfb, int, 0444);
 219
 220 MODULE_PARM_DESC(dpm, "DPM support (1 = enable, 0 = disable, -1 = auto)");
 221 module_param_named(dpm, radeon_dpm, int, 0444);
 222
 223 MODULE_PARM_DESC(aspm, "ASPM support (1 = enable, 0 = disable, -1 = auto)");
 224 module_param_named(aspm, radeon_aspm, int, 0444);
 225
 226 static struct pci_device_id pciidlist[] = {
 227         radeon_PCI_IDS
 228 };
 229
 230 MODULE_DEVICE_TABLE(pci, pciidlist);
 231
 232 #ifdef CONFIG_DRM_RADEON_UMS
 233
 234 static int radeon_suspend(struct drm_device *dev, pm_message_t state)
 235 {
 236         drm_radeon_private_t *dev_priv = dev->dev_private;
 237
 238         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 239                 return 0;
 240
 241         /* Disable *all* interrupts */
 242         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 243                 RADEON_WRITE(R500_DxMODE_INT_MASK, 0);
 244         RADEON_WRITE(RADEON_GEN_INT_CNTL, 0);
 245         return 0;
 246 }
 247
 248 static int radeon_resume(struct drm_device *dev)
 249 {
 250         drm_radeon_private_t *dev_priv = dev->dev_private;
 251
 252         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_R600)
 253                 return 0;
 254
 255         /* Restore interrupt registers */
 256         if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RS600)
 257                 RADEON_WRITE(R500_DxMODE_INT_MASK, dev_priv->r500_disp_irq_reg);
 258         RADEON_WRITE(RADEON_GEN_INT_CNTL, dev_priv->irq_enable_reg);
 259         return 0;
 260 }
 261
 262 static const struct file_operations radeon_driver_old_fops = {
 263         .owner = THIS_MODULE,
 264         .open = drm_open,
 265         .release = drm_release,
 266         .unlocked_ioctl = drm_ioctl,
 267         .mmap = drm_mmap,
 268         .poll = drm_poll,
 269         .read = drm_read,
 270 #ifdef CONFIG_COMPAT
 271         .compat_ioctl = radeon_compat_ioctl,
 272 #endif
 273         .llseek = noop_llseek,
 274 };
 275
 276 static struct drm_driver driver_old = {
 277         .driver_features =
 278             DRIVER_USE_AGP | DRIVER_PCI_DMA | DRIVER_SG |
 279             DRIVER_HAVE_IRQ | DRIVER_HAVE_DMA | DRIVER_IRQ_SHARED,
 280         .dev_priv_size = sizeof(drm_radeon_buf_priv_t),
 281         .load = radeon_driver_load,
 282         .firstopen = radeon_driver_firstopen,
 283         .open = radeon_driver_open,
 284         .preclose = radeon_driver_preclose,
 285         .postclose = radeon_driver_postclose,
 286         .lastclose = radeon_driver_lastclose,
 287         .unload = radeon_driver_unload,
 288         .suspend = radeon_suspend,
 289         .resume = radeon_resume,
 290         .get_vblank_counter = radeon_get_vblank_counter,
 291         .enable_vblank = radeon_enable_vblank,
 292         .disable_vblank = radeon_disable_vblank,
 293         .master_create = radeon_master_create,
 294         .master_destroy = radeon_master_destroy,
 295         .irq_preinstall = radeon_driver_irq_preinstall,
 296         .irq_postinstall = radeon_driver_irq_postinstall,
 297         .irq_uninstall = radeon_driver_irq_uninstall,
 298         .irq_handler = radeon_driver_irq_handler,
 299         .ioctls = radeon_ioctls,
 300         .dma_ioctl = radeon_cp_buffers,
 301         .fops = &radeon_driver_old_fops,
 302         .name = DRIVER_NAME,
 303         .desc = DRIVER_DESC,
 304         .date = DRIVER_DATE,
 305         .major = DRIVER_MAJOR,
 306         .minor = DRIVER_MINOR,
 307         .patchlevel = DRIVER_PATCHLEVEL,
 308 };
 309
 310 #endif
 311
 312 static struct drm_driver kms_driver;
 313
 314 static int radeon_kick_out_firmware_fb(struct pci_dev *pdev)
 315 {
 316         struct apertures_struct *ap;
 317         bool primary = false;
 318
 319         ap = alloc_apertures(1);
 320         if (!ap)
 321                 return -ENOMEM;
 322
 323         ap->ranges[0].base = pci_resource_start(pdev, 0);
 324         ap->ranges[0].size = pci_resource_len(pdev, 0);
 325
 326 #ifdef CONFIG_X86
 327         primary = pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 328 #endif
 329         remove_conflicting_framebuffers(ap, "radeondrmfb", primary);
 330         kfree(ap);
 331
 332         return 0;
 333 }
 334
 335 static int radeon_pci_probe(struct pci_dev *pdev,
 336                             const struct pci_device_id *ent)
 337 {
 338         int ret;
 339
 340         /* Get rid of things like offb */
 341         ret = radeon_kick_out_firmware_fb(pdev);
 342         if (ret)
 343                 return ret;
 344
 345         return drm_get_pci_dev(pdev, ent, &kms_driver);
 346 }
 347
 348 static void
 349 radeon_pci_remove(struct pci_dev *pdev)
 350 {
 351         struct drm_device *dev = pci_get_drvdata(pdev);
 352
 353         drm_put_dev(dev);
 354 }
 355
 356 static int
 357 radeon_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 358 {
 359         struct drm_device *dev = pci_get_drvdata(pdev);
 360         return radeon_suspend_kms(dev, state);
 361 }
 362
 363 static int
 364 radeon_pci_resume(struct pci_dev *pdev)
 365 {
 366         struct drm_device *dev = pci_get_drvdata(pdev);
 367         return radeon_resume_kms(dev);
 368 }
 369
 370 static const struct file_operations radeon_driver_kms_fops = {
 371         .owner = THIS_MODULE,
 372         .open = drm_open,
 373         .release = drm_release,
 374         .unlocked_ioctl = drm_ioctl,
 375         .mmap = radeon_mmap,
 376         .poll = drm_poll,
 377         .read = drm_read,
 378 #ifdef CONFIG_COMPAT
 379         .compat_ioctl = radeon_kms_compat_ioctl,
 380 #endif
 381 };
 382
 383 static struct drm_driver kms_driver = {
 384         .driver_features =
 385             DRIVER_USE_AGP |
 386             DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM |
 387             DRIVER_PRIME,
 388         .dev_priv_size = 0,
 389         .load = radeon_driver_load_kms,
 390         .open = radeon_driver_open_kms,
 391         .preclose = radeon_driver_preclose_kms,
 392         .postclose = radeon_driver_postclose_kms,
 393         .lastclose = radeon_driver_lastclose_kms,
 394         .unload = radeon_driver_unload_kms,
 395         .suspend = radeon_suspend_kms,
 396         .resume = radeon_resume_kms,
 397         .get_vblank_counter = radeon_get_vblank_counter_kms,
 398         .enable_vblank = radeon_enable_vblank_kms,
 399         .disable_vblank = radeon_disable_vblank_kms,
 400         .get_vblank_timestamp = radeon_get_vblank_timestamp_kms,
 401         .get_scanout_position = radeon_get_crtc_scanoutpos,
 402 #if defined(CONFIG_DEBUG_FS)
 403         .debugfs_init = radeon_debugfs_init,
 404         .debugfs_cleanup = radeon_debugfs_cleanup,
 405 #endif
 406         .irq_preinstall = radeon_driver_irq_preinstall_kms,
 407         .irq_postinstall = radeon_driver_irq_postinstall_kms,
 408         .irq_uninstall = radeon_driver_irq_uninstall_kms,
 409         .irq_handler = radeon_driver_irq_handler_kms,
 410         .ioctls = radeon_ioctls_kms,
 411         .gem_init_object = radeon_gem_object_init,
 412         .gem_free_object = radeon_gem_object_free,
 413         .gem_open_object = radeon_gem_object_open,
 414         .gem_close_object = radeon_gem_object_close,
 415         .dumb_create = radeon_mode_dumb_create,
 416         .dumb_map_offset = radeon_mode_dumb_mmap,
 417         .dumb_destroy = drm_gem_dumb_destroy,
 418         .fops = &radeon_driver_kms_fops,
 419
 420         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 421         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 422         .gem_prime_export = drm_gem_prime_export,
 423         .gem_prime_import = drm_gem_prime_import,
 424         .gem_prime_pin = radeon_gem_prime_pin,
 425         .gem_prime_unpin = radeon_gem_prime_unpin,
 426         .gem_prime_get_sg_table = radeon_gem_prime_get_sg_table,
 427         .gem_prime_import_sg_table = radeon_gem_prime_import_sg_table,
 428         .gem_prime_vmap = radeon_gem_prime_vmap,
 429         .gem_prime_vunmap = radeon_gem_prime_vunmap,
 430
 431         .name = DRIVER_NAME,
 432         .desc = DRIVER_DESC,
 433         .date = DRIVER_DATE,
 434         .major = KMS_DRIVER_MAJOR,
 435         .minor = KMS_DRIVER_MINOR,
 436         .patchlevel = KMS_DRIVER_PATCHLEVEL,
 437 };
 438
 439 static struct drm_driver *driver;
 440 static struct pci_driver *pdriver;
 441
 442 #ifdef CONFIG_DRM_RADEON_UMS
 443 static struct pci_driver radeon_pci_driver = {
 444         .name = DRIVER_NAME,
 445         .id_table = pciidlist,
 446 };
 447 #endif
 448
 449 static struct pci_driver radeon_kms_pci_driver = {
 450         .name = DRIVER_NAME,
 451         .id_table = pciidlist,
 452         .probe = radeon_pci_probe,
 453         .remove = radeon_pci_remove,
 454         .suspend = radeon_pci_suspend,
 455         .resume = radeon_pci_resume,
 456 };
 457
 458 static int __init radeon_init(void)
 459 {
 460 #ifdef CONFIG_VGA_CONSOLE
 461         if (vgacon_text_force() && radeon_modeset == -1) {
 462                 DRM_INFO("VGACON disable radeon kernel modesetting.\n");
 463                 radeon_modeset = 0;
 464         }
 465 #endif
 466         /* set to modesetting by default if not nomodeset */
 467         if (radeon_modeset == -1)
 468                 radeon_modeset = 1;
 469
 470         if (radeon_modeset == 1) {
 471                 DRM_INFO("radeon kernel modesetting enabled.\n");
 472                 driver = &kms_driver;
 473                 pdriver = &radeon_kms_pci_driver;
 474                 driver->driver_features |= DRIVER_MODESET;
 475                 driver->num_ioctls = radeon_max_kms_ioctl;
 476                 radeon_register_atpx_handler();
 477
 478         } else {
 479 #ifdef CONFIG_DRM_RADEON_UMS
 480                 DRM_INFO("radeon userspace modesetting enabled.\n");
 481                 driver = &driver_old;
 482                 pdriver = &radeon_pci_driver;
 483                 driver->driver_features &= ~DRIVER_MODESET;
 484                 driver->num_ioctls = radeon_max_ioctl;
 485 #else
 486                 DRM_ERROR("No UMS support in radeon module!\n");
 487                 return -EINVAL;
 488 #endif
 489         }
 490
 491         /* let modprobe override vga console setting */
 492         return drm_pci_init(driver, pdriver);
 493 }
 494
 495 static void __exit radeon_exit(void)
 496 {
 497         drm_pci_exit(driver, pdriver);
 498         radeon_unregister_atpx_handler();
 499 }
 500
 501 module_init(radeon_init);
 502 module_exit(radeon_exit);
 503
 504 MODULE_AUTHOR(DRIVER_AUTHOR);
 505 MODULE_DESCRIPTION(DRIVER_DESC);
 506 MODULE_LICENSE("GPL and additional rights");