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 "drmP.h" 50#include "drm_core.h" 51 52static int drm_version(struct inode *inode, struct file *filp, 53 unsigned int cmd, unsigned long arg); 54 55/** Ioctl table */ 56static drm_ioctl_desc_t drm_ioctls[] = { 57 [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = {drm_version, 0}, 58 [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = {drm_getunique, 0}, 59 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = {drm_getmagic, 0}, 60 [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = {drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY}, 61 [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = {drm_getmap, 0}, 62 [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = {drm_getclient, 0}, 63 [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = {drm_getstats, 0}, 64 [DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = {drm_setversion, DRM_MASTER|DRM_ROOT_ONLY}, 65 [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = {drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 66 [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 67 [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 68 [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = {drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 69 70 [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = {drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 71 [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = {drm_rmmap_ioctl, DRM_AUTH}, 72 73 [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = {drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 74 [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = {drm_getsareactx, DRM_AUTH}, 75 76 [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = {drm_addctx, DRM_AUTH|DRM_ROOT_ONLY}, 77 [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = {drm_rmctx, DRM_AUTH|DRM_ROOT_ONLY}, 78 [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = {drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 79 [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = {drm_getctx, DRM_AUTH}, 80 [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = {drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 81 [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = {drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 82 [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = {drm_resctx, DRM_AUTH}, 83 84 [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = {drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 85 [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = {drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 86 87 [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = {drm_lock, DRM_AUTH}, 88 [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = {drm_unlock, DRM_AUTH}, 89 90 [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = {drm_noop, DRM_AUTH}, 91 92 [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = {drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 93 [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = {drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 94 [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = {drm_infobufs, DRM_AUTH}, 95 [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = {drm_mapbufs, DRM_AUTH}, 96 [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = {drm_freebufs, DRM_AUTH}, 97 /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ 98 [DRM_IOCTL_NR(DRM_IOCTL_DMA)] = {NULL, DRM_AUTH}, 99 100 [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = {drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 101 102#if __OS_HAS_AGP 103 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = {drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 104 [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = {drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 105 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = {drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 106 [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = {drm_agp_info_ioctl, DRM_AUTH}, 107 [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = {drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 108 [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = {drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 109 [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = {drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 110 [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = {drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 111#endif 112 113 [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = {drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 114 [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = {drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 115 116 [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = {drm_wait_vblank, 0}, 117 118 [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW)] = {drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, 119}; 120 121#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) 122 123/** 124 * Take down the DRM device. 125 * 126 * \param dev DRM device structure. 127 * 128 * Frees every resource in \p dev. 129 * 130 * \sa drm_device 131 */ 132int drm_lastclose(drm_device_t * dev) 133{ 134 drm_magic_entry_t *pt, *next; 135 drm_map_list_t *r_list; 136 drm_vma_entry_t *vma, *vma_next; 137 int i; 138 139 DRM_DEBUG("\n"); 140 141 if (dev->driver->lastclose) 142 dev->driver->lastclose(dev); 143 DRM_DEBUG("driver lastclose completed\n"); 144 145 if (dev->unique) { 146 drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); 147 dev->unique = NULL; 148 dev->unique_len = 0; 149 } 150 151 if (dev->irq_enabled) 152 drm_irq_uninstall(dev); 153 154 /* Free drawable information memory */ 155 for (i = 0; i < dev->drw_bitfield_length / sizeof(*dev->drw_bitfield); 156 i++) { 157 drm_drawable_info_t *info = drm_get_drawable_info(dev, i); 158 159 if (info) { 160 drm_free(info->rects, info->num_rects * 161 sizeof(drm_clip_rect_t), DRM_MEM_BUFS); 162 drm_free(info, sizeof(*info), DRM_MEM_BUFS); 163 } 164 } 165 166 mutex_lock(&dev->struct_mutex); 167 del_timer(&dev->timer); 168 169 /* Clear pid list */ 170 if (dev->magicfree.next) { 171 list_for_each_entry_safe(pt, next, &dev->magicfree, head) { 172 list_del(&pt->head); 173 drm_ht_remove_item(&dev->magiclist, &pt->hash_item); 174 drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); 175 } 176 drm_ht_remove(&dev->magiclist); 177 } 178 179 /* Clear AGP information */ 180 if (drm_core_has_AGP(dev) && dev->agp) { 181 drm_agp_mem_t *entry; 182 drm_agp_mem_t *nexte; 183 184 /* Remove AGP resources, but leave dev->agp 185 intact until drv_cleanup is called. */ 186 for (entry = dev->agp->memory; entry; entry = nexte) { 187 nexte = entry->next; 188 if (entry->bound) 189 drm_unbind_agp(entry->memory); 190 drm_free_agp(entry->memory, entry->pages); 191 drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); 192 } 193 dev->agp->memory = NULL; 194 195 if (dev->agp->acquired) 196 drm_agp_release(dev); 197 198 dev->agp->acquired = 0; 199 dev->agp->enabled = 0; 200 } 201 if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { 202 drm_sg_cleanup(dev->sg); 203 dev->sg = NULL; 204 } 205 206 /* Clear vma list (only built for debugging) */ 207 if (dev->vmalist) { 208 for (vma = dev->vmalist; vma; vma = vma_next) { 209 vma_next = vma->next; 210 drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); 211 } 212 dev->vmalist = NULL; 213 } 214 215 if (dev->maplist) { 216 while (!list_empty(&dev->maplist->head)) { 217 struct list_head *list = dev->maplist->head.next; 218 r_list = list_entry(list, drm_map_list_t, head); 219 drm_rmmap_locked(dev, r_list->map); 220 } 221 } 222 223 if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) { 224 for (i = 0; i < dev->queue_count; i++) { 225 if (dev->queuelist[i]) { 226 drm_free(dev->queuelist[i], 227 sizeof(*dev->queuelist[0]), 228 DRM_MEM_QUEUES); 229 dev->queuelist[i] = NULL; 230 } 231 } 232 drm_free(dev->queuelist, 233 dev->queue_slots * sizeof(*dev->queuelist), 234 DRM_MEM_QUEUES); 235 dev->queuelist = NULL; 236 } 237 dev->queue_count = 0; 238 239 if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) 240 drm_dma_takedown(dev); 241 242 if (dev->lock.hw_lock) { 243 dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */ 244 dev->lock.filp = NULL; 245 wake_up_interruptible(&dev->lock.lock_queue); 246 } 247 mutex_unlock(&dev->struct_mutex); 248 249 DRM_DEBUG("lastclose completed\n"); 250 return 0; 251} 252 253/** 254 * Module initialization. Called via init_module at module load time, or via 255 * linux/init/main.c (this is not currently supported). 256 * 257 * \return zero on success or a negative number on failure. 258 * 259 * Initializes an array of drm_device structures, and attempts to 260 * initialize all available devices, using consecutive minors, registering the 261 * stubs and initializing the AGP device. 262 * 263 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and 264 * after the initialization for driver customization. 265 */ 266int drm_init(struct drm_driver *driver) 267{ 268 struct pci_dev *pdev = NULL; 269 struct pci_device_id *pid; 270 int i; 271 272 DRM_DEBUG("\n"); 273 274 drm_mem_init(); 275 276 for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) { 277 pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; 278 279 pdev = NULL; 280 /* pass back in pdev to account for multiple identical cards */ 281 while ((pdev = 282 pci_get_subsys(pid->vendor, pid->device, pid->subvendor, 283 pid->subdevice, pdev)) != NULL) { 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 292EXPORT_SYMBOL(drm_init); 293 294/** 295 * Called via cleanup_module() at module unload time. 296 * 297 * Cleans up all DRM device, calling drm_lastclose(). 298 * 299 * \sa drm_init 300 */ 301static void drm_cleanup(drm_device_t * dev) 302{ 303 DRM_DEBUG("\n"); 304 305 if (!dev) { 306 DRM_ERROR("cleanup called no dev\n"); 307 return; 308 } 309 310 drm_lastclose(dev); 311 312 if (dev->maplist) { 313 drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS); 314 dev->maplist = NULL; 315 drm_ht_remove(&dev->map_hash); 316 } 317 318 drm_ctxbitmap_cleanup(dev); 319 320 if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && 321 dev->agp && dev->agp->agp_mtrr >= 0) { 322 int retval; 323 retval = mtrr_del(dev->agp->agp_mtrr, 324 dev->agp->agp_info.aper_base, 325 dev->agp->agp_info.aper_size * 1024 * 1024); 326 DRM_DEBUG("mtrr_del=%d\n", retval); 327 } 328 329 if (drm_core_has_AGP(dev) && dev->agp) { 330 drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); 331 dev->agp = NULL; 332 } 333 334 if (dev->driver->unload) 335 dev->driver->unload(dev); 336 337 drm_put_head(&dev->primary); 338 if (drm_put_dev(dev)) 339 DRM_ERROR("Cannot unload module\n"); 340} 341 342void drm_exit(struct drm_driver *driver) 343{ 344 int i; 345 drm_device_t *dev = NULL; 346 drm_head_t *head; 347 348 DRM_DEBUG("\n"); 349 350 for (i = 0; i < drm_cards_limit; i++) { 351 head = drm_heads[i]; 352 if (!head) 353 continue; 354 if (!head->dev) 355 continue; 356 if (head->dev->driver != driver) 357 continue; 358 dev = head->dev; 359 if (dev) { 360 /* release the pci driver */ 361 if (dev->pdev) 362 pci_dev_put(dev->pdev); 363 drm_cleanup(dev); 364 } 365 } 366 DRM_INFO("Module unloaded\n"); 367} 368 369EXPORT_SYMBOL(drm_exit); 370 371/** File operations structure */ 372static const struct file_operations drm_stub_fops = { 373 .owner = THIS_MODULE, 374 .open = drm_stub_open 375}; 376 377static int __init drm_core_init(void) 378{ 379 int ret = -ENOMEM; 380 381 drm_cards_limit = 382 (drm_cards_limit < 383 DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1); 384 drm_heads = 385 drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB); 386 if (!drm_heads) 387 goto err_p1; 388 389 if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) 390 goto err_p1; 391 392 drm_class = drm_sysfs_create(THIS_MODULE, "drm"); 393 if (IS_ERR(drm_class)) { 394 printk(KERN_ERR "DRM: Error creating drm class.\n"); 395 ret = PTR_ERR(drm_class); 396 goto err_p2; 397 } 398 399 drm_proc_root = proc_mkdir("dri", NULL); 400 if (!drm_proc_root) { 401 DRM_ERROR("Cannot create /proc/dri\n"); 402 ret = -1; 403 goto err_p3; 404 } 405 406 DRM_INFO("Initialized %s %d.%d.%d %s\n", 407 CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); 408 return 0; 409 err_p3: 410 drm_sysfs_destroy(drm_class); 411 err_p2: 412 unregister_chrdev(DRM_MAJOR, "drm"); 413 drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); 414 err_p1: 415 return ret; 416} 417 418static void __exit drm_core_exit(void) 419{ 420 remove_proc_entry("dri", NULL); 421 drm_sysfs_destroy(drm_class); 422 423 unregister_chrdev(DRM_MAJOR, "drm"); 424 425 drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); 426} 427 428module_init(drm_core_init); 429module_exit(drm_core_exit); 430 431/** 432 * Get version information 433 * 434 * \param inode device inode. 435 * \param filp file pointer. 436 * \param cmd command. 437 * \param arg user argument, pointing to a drm_version structure. 438 * \return zero on success or negative number on failure. 439 * 440 * Fills in the version information in \p arg. 441 */ 442static int drm_version(struct inode *inode, struct file *filp, 443 unsigned int cmd, unsigned long arg) 444{ 445 drm_file_t *priv = filp->private_data; 446 drm_device_t *dev = priv->head->dev; 447 drm_version_t __user *argp = (void __user *)arg; 448 drm_version_t version; 449 int len; 450 451 if (copy_from_user(&version, argp, sizeof(version))) 452 return -EFAULT; 453 454 version.version_major = dev->driver->major; 455 version.version_minor = dev->driver->minor; 456 version.version_patchlevel = dev->driver->patchlevel; 457 DRM_COPY(version.name, dev->driver->name); 458 DRM_COPY(version.date, dev->driver->date); 459 DRM_COPY(version.desc, dev->driver->desc); 460 461 if (copy_to_user(argp, &version, sizeof(version))) 462 return -EFAULT; 463 return 0; 464} 465 466/** 467 * Called whenever a process performs an ioctl on /dev/drm. 468 * 469 * \param inode device inode. 470 * \param filp file pointer. 471 * \param cmd command. 472 * \param arg user argument. 473 * \return zero on success or negative number on failure. 474 * 475 * Looks up the ioctl function in the ::ioctls table, checking for root 476 * previleges if so required, and dispatches to the respective function. 477 */ 478int drm_ioctl(struct inode *inode, struct file *filp, 479 unsigned int cmd, unsigned long arg) 480{ 481 drm_file_t *priv = filp->private_data; 482 drm_device_t *dev = priv->head->dev; 483 drm_ioctl_desc_t *ioctl; 484 drm_ioctl_t *func; 485 unsigned int nr = DRM_IOCTL_NR(cmd); 486 int retcode = -EINVAL; 487 488 atomic_inc(&dev->ioctl_count); 489 atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); 490 ++priv->ioctl_count; 491 492 DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", 493 current->pid, cmd, nr, 494 (long)old_encode_dev(priv->head->device), 495 priv->authenticated); 496 497 if ((nr >= DRM_CORE_IOCTL_COUNT) && 498 ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) 499 goto err_i1; 500 if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) && 501 (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) 502 ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; 503 else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) 504 ioctl = &drm_ioctls[nr]; 505 else 506 goto err_i1; 507 508 func = ioctl->func; 509 /* is there a local override? */ 510 if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) 511 func = dev->driver->dma_ioctl; 512 513 if (!func) { 514 DRM_DEBUG("no function\n"); 515 retcode = -EINVAL; 516 } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || 517 ((ioctl->flags & DRM_AUTH) && !priv->authenticated) || 518 ((ioctl->flags & DRM_MASTER) && !priv->master)) { 519 retcode = -EACCES; 520 } else { 521 retcode = func(inode, filp, cmd, arg); 522 } 523 524 err_i1: 525 atomic_dec(&dev->ioctl_count); 526 if (retcode) 527 DRM_DEBUG("ret = %x\n", retcode); 528 return retcode; 529} 530 531EXPORT_SYMBOL(drm_ioctl); 532