1 /** 2 * \file drm_drv.c 3 * Generic driver template 4 * 5 * \author Rickard E. (Rik) Faith <faith@valinux.com> 6 * \author Gareth Hughes <gareth@valinux.com> 7 * 8 * To use this template, you must at least define the following (samples 9 * given for the MGA driver): 10 * 11 * \code 12 * #define DRIVER_AUTHOR "VA Linux Systems, Inc." 13 * 14 * #define DRIVER_NAME "mga" 15 * #define DRIVER_DESC "Matrox G200/G400" 16 * #define DRIVER_DATE "20001127" 17 * 18 * #define drm_x mga_##x 19 * \endcode 20 */ 21 22 /* 23 * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com 24 * 25 * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. 26 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 27 * All Rights Reserved. 28 * 29 * Permission is hereby granted, free of charge, to any person obtaining a 30 * copy of this software and associated documentation files (the "Software"), 31 * to deal in the Software without restriction, including without limitation 32 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 33 * and/or sell copies of the Software, and to permit persons to whom the 34 * Software is furnished to do so, subject to the following conditions: 35 * 36 * The above copyright notice and this permission notice (including the next 37 * paragraph) shall be included in all copies or substantial portions of the 38 * Software. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 41 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 42 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 43 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 44 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 46 * OTHER DEALINGS IN THE SOFTWARE. 47 */ 48 49 #include <linux/debugfs.h> 50 #include "drmP.h" 51 #include "drm_core.h" 52 53 54 static int drm_version(struct drm_device *dev, void *data, 55 struct drm_file *file_priv); 56 57 /** Ioctl table */ 58 static struct drm_ioctl_desc drm_ioctls[] = { 59 DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0), 60 DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0), 61 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0), 62 DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY), 63 DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, 0), 64 DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, 0), 65 DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, 0), 66 DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER|DRM_ROOT_ONLY), 67 68 DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 69 DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 70 DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 71 DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 72 73 DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 74 DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH), 75 76 DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 77 DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH), 78 79 DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY), 80 DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY), 81 82 DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY), 83 DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 84 DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 85 DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH), 86 DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 87 DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 88 DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH), 89 90 DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 91 DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 92 93 DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH), 94 DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH), 95 96 DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH), 97 98 DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 99 DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 100 DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH), 101 DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH), 102 DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH), 103 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ 104 DRM_IOCTL_DEF(DRM_IOCTL_DMA, NULL, DRM_AUTH), 105 106 DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 107 108 #if __OS_HAS_AGP 109 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 110 DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 111 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 112 DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH), 113 DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 114 DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 115 DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 116 DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 117 #endif 118 119 DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 120 DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 121 122 DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, 0), 123 124 DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0), 125 126 DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 127 128 DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, 0), 129 DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH), 130 DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH), 131 132 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_MASTER|DRM_CONTROL_ALLOW), 133 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_MASTER|DRM_CONTROL_ALLOW), 134 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW), 135 DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 136 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_MASTER), 137 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER), 138 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_MASTER|DRM_CONTROL_ALLOW), 139 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_MASTER|DRM_CONTROL_ALLOW), 140 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_mode_attachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 141 DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_mode_detachmode_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 142 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_MASTER | DRM_CONTROL_ALLOW), 143 DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 144 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW), 145 DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_MASTER|DRM_CONTROL_ALLOW), 146 DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_MASTER|DRM_CONTROL_ALLOW), 147 DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_MASTER|DRM_CONTROL_ALLOW), 148 }; 149 150 #define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 151 152 /** 153 * Take down the DRM device. 154 * 155 * \param dev DRM device structure. 156 * 157 * Frees every resource in \p dev. 158 * 159 * \sa drm_device 160 */ 161 int drm_lastclose(struct drm_device * dev) 162 { 163 struct drm_vma_entry *vma, *vma_temp; 164 int i; 165 166 DRM_DEBUG("\n"); 167 168 if (dev->driver->lastclose) 169 dev->driver->lastclose(dev); 170 DRM_DEBUG("driver lastclose completed\n"); 171 172 if (dev->irq_enabled && !drm_core_check_feature(dev, DRIVER_MODESET)) 173 drm_irq_uninstall(dev); 174 175 mutex_lock(&dev->struct_mutex); 176 177 /* Free drawable information memory */ 178 drm_drawable_free_all(dev); 179 del_timer(&dev->timer); 180 181 /* Clear AGP information */ 182 if (drm_core_has_AGP(dev) && dev->agp && 183 !drm_core_check_feature(dev, DRIVER_MODESET)) { 184 struct drm_agp_mem *entry, *tempe; 185 186 /* Remove AGP resources, but leave dev->agp 187 intact until drv_cleanup is called. */ 188 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) { 189 if (entry->bound) 190 drm_unbind_agp(entry->memory); 191 drm_free_agp(entry->memory, entry->pages); 192 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); 193 } 194 INIT_LIST_HEAD(&dev->agp->memory); 195 196 if (dev->agp->acquired) 197 drm_agp_release(dev); 198 199 dev->agp->acquired = 0; 200 dev->agp->enabled = 0; 201 } 202 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg && 203 !drm_core_check_feature(dev, DRIVER_MODESET)) { 204 drm_sg_cleanup(dev->sg); 205 dev->sg = NULL; 206 } 207 208 /* Clear vma list (only built for debugging) */ 209 list_for_each_entry_safe(vma, vma_temp, &dev->vmalist, head) { 210 list_del(&vma->head); 211 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); 212 } 213 214 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) { 215 for (i = 0; i < dev->queue_count; i++) { 216 if (dev->queuelist[i]) { 217 drm_free(dev->queuelist[i], 218 sizeof(*dev->queuelist[0]), 219 DRM_MEM_QUEUES); 220 dev->queuelist[i] = NULL; 221 } 222 } 223 drm_free(dev->queuelist, 224 dev->queue_slots * sizeof(*dev->queuelist), 225 DRM_MEM_QUEUES); 226 dev->queuelist = NULL; 227 } 228 dev->queue_count = 0; 229 230 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && 231 !drm_core_check_feature(dev, DRIVER_MODESET)) 232 drm_dma_takedown(dev); 233 234 dev->dev_mapping = NULL; 235 mutex_unlock(&dev->struct_mutex); 236 237 DRM_DEBUG("lastclose completed\n"); 238 return 0; 239 } 240 241 /** 242 * Module initialization. Called via init_module at module load time, or via 243 * linux/init/main.c (this is not currently supported). 244 * 245 * \return zero on success or a negative number on failure. 246 * 247 * Initializes an array of drm_device structures, and attempts to 248 * initialize all available devices, using consecutive minors, registering the 249 * stubs and initializing the AGP device. 250 * 251 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and 252 * after the initialization for driver customization. 253 */ 254 int drm_init(struct drm_driver *driver) 255 { 256 struct pci_dev *pdev = NULL; 257 const struct pci_device_id *pid; 258 int i; 259 260 DRM_DEBUG("\n"); 261 262 INIT_LIST_HEAD(&driver->device_list); 263 264 if (driver->driver_features & DRIVER_MODESET) 265 return pci_register_driver(&driver->pci_driver); 266 267 /* If not using KMS, fall back to stealth mode manual scanning. */ 268 for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) { 269 pid = &driver->pci_driver.id_table[i]; 270 271 /* Loop around setting up a DRM device for each PCI device 272 * matching our ID and device class. If we had the internal 273 * function that pci_get_subsys and pci_get_class used, we'd 274 * be able to just pass pid in instead of doing a two-stage 275 * thing. 276 */ 277 pdev = NULL; 278 while ((pdev = 279 pci_get_subsys(pid->vendor, pid->device, pid->subvendor, 280 pid->subdevice, pdev)) != NULL) { 281 if ((pdev->class & pid->class_mask) != pid->class) 282 continue; 283 284 /* stealth mode requires a manual probe */ 285 pci_dev_get(pdev); 286 drm_get_dev(pdev, pid, driver); 287 } 288 } 289 return 0; 290 } 291 292 EXPORT_SYMBOL(drm_init); 293 294 void drm_exit(struct drm_driver *driver) 295 { 296 struct drm_device *dev, *tmp; 297 DRM_DEBUG("\n"); 298 299 if (driver->driver_features & DRIVER_MODESET) { 300 pci_unregister_driver(&driver->pci_driver); 301 } else { 302 list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item) 303 drm_put_dev(dev); 304 } 305 306 DRM_INFO("Module unloaded\n"); 307 } 308 309 EXPORT_SYMBOL(drm_exit); 310 311 /** File operations structure */ 312 static const struct file_operations drm_stub_fops = { 313 .owner = THIS_MODULE, 314 .open = drm_stub_open 315 }; 316 317 static int __init drm_core_init(void) 318 { 319 int ret = -ENOMEM; 320 321 idr_init(&drm_minors_idr); 322 323 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 324 goto err_p1; 325 326 drm_class = drm_sysfs_create(THIS_MODULE, "drm"); 327 if (IS_ERR(drm_class)) { 328 printk(KERN_ERR "DRM: Error creating drm class.\n"); 329 ret = PTR_ERR(drm_class); 330 goto err_p2; 331 } 332 333 drm_proc_root = proc_mkdir("dri", NULL); 334 if (!drm_proc_root) { 335 DRM_ERROR("Cannot create /proc/dri\n"); 336 ret = -1; 337 goto err_p3; 338 } 339 340 drm_debugfs_root = debugfs_create_dir("dri", NULL); 341 if (!drm_debugfs_root) { 342 DRM_ERROR("Cannot create /debugfs/dri\n"); 343 ret = -1; 344 goto err_p3; 345 } 346 347 drm_mem_init(); 348 349 DRM_INFO("Initialized %s %d.%d.%d %s\n", 350 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 351 return 0; 352 err_p3: 353 drm_sysfs_destroy(); 354 err_p2: 355 unregister_chrdev(DRM_MAJOR, "drm"); 356 357 idr_destroy(&drm_minors_idr); 358 err_p1: 359 return ret; 360 } 361 362 static void __exit drm_core_exit(void) 363 { 364 remove_proc_entry("dri", NULL); 365 debugfs_remove(drm_debugfs_root); 366 drm_sysfs_destroy(); 367 368 unregister_chrdev(DRM_MAJOR, "drm"); 369 370 idr_destroy(&drm_minors_idr); 371 } 372 373 module_init(drm_core_init); 374 module_exit(drm_core_exit); 375 376 /** 377 * Get version information 378 * 379 * \param inode device inode. 380 * \param filp file pointer. 381 * \param cmd command. 382 * \param arg user argument, pointing to a drm_version structure. 383 * \return zero on success or negative number on failure. 384 * 385 * Fills in the version information in \p arg. 386 */ 387 static int drm_version(struct drm_device *dev, void *data, 388 struct drm_file *file_priv) 389 { 390 struct drm_version *version = data; 391 int len; 392 393 version->version_major = dev->driver->major; 394 version->version_minor = dev->driver->minor; 395 version->version_patchlevel = dev->driver->patchlevel; 396 DRM_COPY(version->name, dev->driver->name); 397 DRM_COPY(version->date, dev->driver->date); 398 DRM_COPY(version->desc, dev->driver->desc); 399 400 return 0; 401 } 402 403 /** 404 * Called whenever a process performs an ioctl on /dev/drm. 405 * 406 * \param inode device inode. 407 * \param file_priv DRM file private. 408 * \param cmd command. 409 * \param arg user argument. 410 * \return zero on success or negative number on failure. 411 * 412 * Looks up the ioctl function in the ::ioctls table, checking for root 413 * previleges if so required, and dispatches to the respective function. 414 */ 415 int drm_ioctl(struct inode *inode, struct file *filp, 416 unsigned int cmd, unsigned long arg) 417 { 418 struct drm_file *file_priv = filp->private_data; 419 struct drm_device *dev = file_priv->minor->dev; 420 struct drm_ioctl_desc *ioctl; 421 drm_ioctl_t *func; 422 unsigned int nr = DRM_IOCTL_NR(cmd); 423 int retcode = -EINVAL; 424 char stack_kdata[128]; 425 char *kdata = NULL; 426 427 atomic_inc(&dev->ioctl_count); 428 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 429 ++file_priv->ioctl_count; 430 431 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", 432 task_pid_nr(current), cmd, nr, 433 (long)old_encode_dev(file_priv->minor->device), 434 file_priv->authenticated); 435 436 if ((nr >= DRM_CORE_IOCTL_COUNT) && 437 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) 438 goto err_i1; 439 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && 440 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) 441 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; 442 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) { 443 ioctl = &drm_ioctls[nr]; 444 cmd = ioctl->cmd; 445 } else 446 goto err_i1; 447 448 /* Do not trust userspace, use our own definition */ 449 func = ioctl->func; 450 /* is there a local override? */ 451 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) 452 func = dev->driver->dma_ioctl; 453 454 if (!func) { 455 DRM_DEBUG("no function\n"); 456 retcode = -EINVAL; 457 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || 458 ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) || 459 ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) || 460 (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) { 461 retcode = -EACCES; 462 } else { 463 if (cmd & (IOC_IN | IOC_OUT)) { 464 if (_IOC_SIZE(cmd) <= sizeof(stack_kdata)) { 465 kdata = stack_kdata; 466 } else { 467 kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 468 if (!kdata) { 469 retcode = -ENOMEM; 470 goto err_i1; 471 } 472 } 473 } 474 475 if (cmd & IOC_IN) { 476 if (copy_from_user(kdata, (void __user *)arg, 477 _IOC_SIZE(cmd)) != 0) { 478 retcode = -EFAULT; 479 goto err_i1; 480 } 481 } 482 retcode = func(dev, kdata, file_priv); 483 484 if ((retcode == 0) && (cmd & IOC_OUT)) { 485 if (copy_to_user((void __user *)arg, kdata, 486 _IOC_SIZE(cmd)) != 0) 487 retcode = -EFAULT; 488 } 489 } 490 491 err_i1: 492 if (kdata != stack_kdata) 493 kfree(kdata); 494 atomic_dec(&dev->ioctl_count); 495 if (retcode) 496 DRM_DEBUG("ret = %x\n", retcode); 497 return retcode; 498 } 499 500 EXPORT_SYMBOL(drm_ioctl); 501 502 struct drm_local_map *drm_getsarea(struct drm_device *dev) 503 { 504 struct drm_map_list *entry; 505 506 list_for_each_entry(entry, &dev->maplist, head) { 507 if (entry->map && entry->map->type == _DRM_SHM && 508 (entry->map->flags & _DRM_CONTAINS_LOCK)) { 509 return entry->map; 510 } 511 } 512 return NULL; 513 } 514 EXPORT_SYMBOL(drm_getsarea); 515