| /** |
| * \file drm_drv.c |
| * Generic driver template |
| * |
| * \author Rickard E. (Rik) Faith <faith@valinux.com> |
| * \author Gareth Hughes <gareth@valinux.com> |
| * |
| * To use this template, you must at least define the following (samples |
| * given for the MGA driver): |
| * |
| * \code |
| * #define DRIVER_AUTHOR "VA Linux Systems, Inc." |
| * |
| * #define DRIVER_NAME "mga" |
| * #define DRIVER_DESC "Matrox G200/G400" |
| * #define DRIVER_DATE "20001127" |
| * |
| * #define DRIVER_IOCTL_COUNT DRM_ARRAY_SIZE( mga_ioctls ) |
| * |
| * #define drm_x mga_##x |
| * \endcode |
| */ |
| |
| /* |
| * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com |
| * |
| * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include "drmP.h" |
| #include "drm_core.h" |
| |
| static int drm_version(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg); |
| |
| /** Ioctl table */ |
| static drm_ioctl_desc_t drm_ioctls[] = { |
| [DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = {drm_version, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = {drm_getunique, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = {drm_getmagic, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = {drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_MAP)] = {drm_getmap, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_CLIENT)] = {drm_getclient, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_STATS)] = {drm_getstats, 0}, |
| [DRM_IOCTL_NR(DRM_IOCTL_SET_VERSION)] = {drm_setversion, DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = {drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = {drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = {drm_authmagic, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = {drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_RM_MAP)] = {drm_rmmap_ioctl, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_SET_SAREA_CTX)] = {drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_SAREA_CTX)] = {drm_getsareactx, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = {drm_addctx, DRM_AUTH|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = {drm_rmctx, DRM_AUTH|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = {drm_modctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = {drm_getctx, DRM_AUTH}, |
| [DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = {drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = {drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = {drm_resctx, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = {drm_adddraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = {drm_rmdraw, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = {drm_lock, DRM_AUTH}, |
| [DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = {drm_unlock, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = {drm_noop, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_ADD_BUFS)] = {drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_MARK_BUFS)] = {drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_INFO_BUFS)] = {drm_infobufs, DRM_AUTH}, |
| [DRM_IOCTL_NR(DRM_IOCTL_MAP_BUFS)] = {drm_mapbufs, DRM_AUTH}, |
| [DRM_IOCTL_NR(DRM_IOCTL_FREE_BUFS)] = {drm_freebufs, DRM_AUTH}, |
| /* The DRM_IOCTL_DMA ioctl should be defined by the driver. */ |
| [DRM_IOCTL_NR(DRM_IOCTL_DMA)] = {NULL, DRM_AUTH}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_CONTROL)] = {drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| |
| #if __OS_HAS_AGP |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = {drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = {drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = {drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = {drm_agp_info_ioctl, DRM_AUTH}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = {drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = {drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = {drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = {drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| #endif |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_SG_ALLOC)] = {drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| [DRM_IOCTL_NR(DRM_IOCTL_SG_FREE)] = {drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_WAIT_VBLANK)] = {drm_wait_vblank, 0}, |
| |
| [DRM_IOCTL_NR(DRM_IOCTL_UPDATE_DRAW)] = {drm_update_drawable_info, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY}, |
| }; |
| |
| #define DRIVER_IOCTL_COUNT ARRAY_SIZE( drm_ioctls ) |
| |
| /** |
| * Take down the DRM device. |
| * |
| * \param dev DRM device structure. |
| * |
| * Frees every resource in \p dev. |
| * |
| * \sa drm_device |
| */ |
| int drm_lastclose(drm_device_t * dev) |
| { |
| drm_magic_entry_t *pt, *next; |
| drm_map_list_t *r_list; |
| drm_vma_entry_t *vma, *vma_next; |
| int i; |
| |
| DRM_DEBUG("\n"); |
| |
| if (dev->driver->lastclose) |
| dev->driver->lastclose(dev); |
| DRM_DEBUG("driver lastclose completed\n"); |
| |
| if (dev->unique) { |
| drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER); |
| dev->unique = NULL; |
| dev->unique_len = 0; |
| } |
| |
| if (dev->irq_enabled) |
| drm_irq_uninstall(dev); |
| |
| /* Free drawable information memory */ |
| for (i = 0; i < dev->drw_bitfield_length / sizeof(*dev->drw_bitfield); |
| i++) { |
| drm_drawable_info_t *info = drm_get_drawable_info(dev, i); |
| |
| if (info) { |
| drm_free(info->rects, info->num_rects * |
| sizeof(drm_clip_rect_t), DRM_MEM_BUFS); |
| drm_free(info, sizeof(*info), DRM_MEM_BUFS); |
| } |
| } |
| |
| mutex_lock(&dev->struct_mutex); |
| del_timer(&dev->timer); |
| |
| /* Clear pid list */ |
| if (dev->magicfree.next) { |
| list_for_each_entry_safe(pt, next, &dev->magicfree, head) { |
| list_del(&pt->head); |
| drm_ht_remove_item(&dev->magiclist, &pt->hash_item); |
| drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC); |
| } |
| drm_ht_remove(&dev->magiclist); |
| } |
| |
| /* Clear AGP information */ |
| if (drm_core_has_AGP(dev) && dev->agp) { |
| drm_agp_mem_t *entry; |
| drm_agp_mem_t *nexte; |
| |
| /* Remove AGP resources, but leave dev->agp |
| intact until drv_cleanup is called. */ |
| for (entry = dev->agp->memory; entry; entry = nexte) { |
| nexte = entry->next; |
| if (entry->bound) |
| drm_unbind_agp(entry->memory); |
| drm_free_agp(entry->memory, entry->pages); |
| drm_free(entry, sizeof(*entry), DRM_MEM_AGPLISTS); |
| } |
| dev->agp->memory = NULL; |
| |
| if (dev->agp->acquired) |
| drm_agp_release(dev); |
| |
| dev->agp->acquired = 0; |
| dev->agp->enabled = 0; |
| } |
| if (drm_core_check_feature(dev, DRIVER_SG) && dev->sg) { |
| drm_sg_cleanup(dev->sg); |
| dev->sg = NULL; |
| } |
| |
| /* Clear vma list (only built for debugging) */ |
| if (dev->vmalist) { |
| for (vma = dev->vmalist; vma; vma = vma_next) { |
| vma_next = vma->next; |
| drm_free(vma, sizeof(*vma), DRM_MEM_VMAS); |
| } |
| dev->vmalist = NULL; |
| } |
| |
| if (dev->maplist) { |
| while (!list_empty(&dev->maplist->head)) { |
| struct list_head *list = dev->maplist->head.next; |
| r_list = list_entry(list, drm_map_list_t, head); |
| drm_rmmap_locked(dev, r_list->map); |
| } |
| } |
| |
| if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) && dev->queuelist) { |
| for (i = 0; i < dev->queue_count; i++) { |
| if (dev->queuelist[i]) { |
| drm_free(dev->queuelist[i], |
| sizeof(*dev->queuelist[0]), |
| DRM_MEM_QUEUES); |
| dev->queuelist[i] = NULL; |
| } |
| } |
| drm_free(dev->queuelist, |
| dev->queue_slots * sizeof(*dev->queuelist), |
| DRM_MEM_QUEUES); |
| dev->queuelist = NULL; |
| } |
| dev->queue_count = 0; |
| |
| if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
| drm_dma_takedown(dev); |
| |
| if (dev->lock.hw_lock) { |
| dev->sigdata.lock = dev->lock.hw_lock = NULL; /* SHM removed */ |
| dev->lock.filp = NULL; |
| wake_up_interruptible(&dev->lock.lock_queue); |
| } |
| mutex_unlock(&dev->struct_mutex); |
| |
| DRM_DEBUG("lastclose completed\n"); |
| return 0; |
| } |
| |
| /** |
| * Module initialization. Called via init_module at module load time, or via |
| * linux/init/main.c (this is not currently supported). |
| * |
| * \return zero on success or a negative number on failure. |
| * |
| * Initializes an array of drm_device structures, and attempts to |
| * initialize all available devices, using consecutive minors, registering the |
| * stubs and initializing the AGP device. |
| * |
| * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and |
| * after the initialization for driver customization. |
| */ |
| int drm_init(struct drm_driver *driver) |
| { |
| struct pci_dev *pdev = NULL; |
| struct pci_device_id *pid; |
| int i; |
| |
| DRM_DEBUG("\n"); |
| |
| drm_mem_init(); |
| |
| for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) { |
| pid = (struct pci_device_id *)&driver->pci_driver.id_table[i]; |
| |
| pdev = NULL; |
| /* pass back in pdev to account for multiple identical cards */ |
| while ((pdev = |
| pci_get_subsys(pid->vendor, pid->device, pid->subvendor, |
| pid->subdevice, pdev)) != NULL) { |
| /* stealth mode requires a manual probe */ |
| pci_dev_get(pdev); |
| drm_get_dev(pdev, pid, driver); |
| } |
| } |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(drm_init); |
| |
| /** |
| * Called via cleanup_module() at module unload time. |
| * |
| * Cleans up all DRM device, calling drm_lastclose(). |
| * |
| * \sa drm_init |
| */ |
| static void drm_cleanup(drm_device_t * dev) |
| { |
| DRM_DEBUG("\n"); |
| |
| if (!dev) { |
| DRM_ERROR("cleanup called no dev\n"); |
| return; |
| } |
| |
| drm_lastclose(dev); |
| |
| if (dev->maplist) { |
| drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS); |
| dev->maplist = NULL; |
| drm_ht_remove(&dev->map_hash); |
| } |
| |
| drm_ctxbitmap_cleanup(dev); |
| |
| if (drm_core_has_MTRR(dev) && drm_core_has_AGP(dev) && |
| dev->agp && dev->agp->agp_mtrr >= 0) { |
| int retval; |
| retval = mtrr_del(dev->agp->agp_mtrr, |
| dev->agp->agp_info.aper_base, |
| dev->agp->agp_info.aper_size * 1024 * 1024); |
| DRM_DEBUG("mtrr_del=%d\n", retval); |
| } |
| |
| if (drm_core_has_AGP(dev) && dev->agp) { |
| drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS); |
| dev->agp = NULL; |
| } |
| |
| if (dev->driver->unload) |
| dev->driver->unload(dev); |
| |
| drm_put_head(&dev->primary); |
| if (drm_put_dev(dev)) |
| DRM_ERROR("Cannot unload module\n"); |
| } |
| |
| void drm_exit(struct drm_driver *driver) |
| { |
| int i; |
| drm_device_t *dev = NULL; |
| drm_head_t *head; |
| |
| DRM_DEBUG("\n"); |
| |
| for (i = 0; i < drm_cards_limit; i++) { |
| head = drm_heads[i]; |
| if (!head) |
| continue; |
| if (!head->dev) |
| continue; |
| if (head->dev->driver != driver) |
| continue; |
| dev = head->dev; |
| if (dev) { |
| /* release the pci driver */ |
| if (dev->pdev) |
| pci_dev_put(dev->pdev); |
| drm_cleanup(dev); |
| } |
| } |
| DRM_INFO("Module unloaded\n"); |
| } |
| |
| EXPORT_SYMBOL(drm_exit); |
| |
| /** File operations structure */ |
| static const struct file_operations drm_stub_fops = { |
| .owner = THIS_MODULE, |
| .open = drm_stub_open |
| }; |
| |
| static int __init drm_core_init(void) |
| { |
| int ret = -ENOMEM; |
| |
| drm_cards_limit = |
| (drm_cards_limit < |
| DRM_MAX_MINOR + 1 ? drm_cards_limit : DRM_MAX_MINOR + 1); |
| drm_heads = |
| drm_calloc(drm_cards_limit, sizeof(*drm_heads), DRM_MEM_STUB); |
| if (!drm_heads) |
| goto err_p1; |
| |
| if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops)) |
| goto err_p1; |
| |
| drm_class = drm_sysfs_create(THIS_MODULE, "drm"); |
| if (IS_ERR(drm_class)) { |
| printk(KERN_ERR "DRM: Error creating drm class.\n"); |
| ret = PTR_ERR(drm_class); |
| goto err_p2; |
| } |
| |
| drm_proc_root = proc_mkdir("dri", NULL); |
| if (!drm_proc_root) { |
| DRM_ERROR("Cannot create /proc/dri\n"); |
| ret = -1; |
| goto err_p3; |
| } |
| |
| DRM_INFO("Initialized %s %d.%d.%d %s\n", |
| CORE_NAME, CORE_MAJOR, CORE_MINOR, CORE_PATCHLEVEL, CORE_DATE); |
| return 0; |
| err_p3: |
| drm_sysfs_destroy(drm_class); |
| err_p2: |
| unregister_chrdev(DRM_MAJOR, "drm"); |
| drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); |
| err_p1: |
| return ret; |
| } |
| |
| static void __exit drm_core_exit(void) |
| { |
| remove_proc_entry("dri", NULL); |
| drm_sysfs_destroy(drm_class); |
| |
| unregister_chrdev(DRM_MAJOR, "drm"); |
| |
| drm_free(drm_heads, sizeof(*drm_heads) * drm_cards_limit, DRM_MEM_STUB); |
| } |
| |
| module_init(drm_core_init); |
| module_exit(drm_core_exit); |
| |
| /** |
| * Get version information |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg user argument, pointing to a drm_version structure. |
| * \return zero on success or negative number on failure. |
| * |
| * Fills in the version information in \p arg. |
| */ |
| static int drm_version(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->head->dev; |
| drm_version_t __user *argp = (void __user *)arg; |
| drm_version_t version; |
| int len; |
| |
| if (copy_from_user(&version, argp, sizeof(version))) |
| return -EFAULT; |
| |
| version.version_major = dev->driver->major; |
| version.version_minor = dev->driver->minor; |
| version.version_patchlevel = dev->driver->patchlevel; |
| DRM_COPY(version.name, dev->driver->name); |
| DRM_COPY(version.date, dev->driver->date); |
| DRM_COPY(version.desc, dev->driver->desc); |
| |
| if (copy_to_user(argp, &version, sizeof(version))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /** |
| * Called whenever a process performs an ioctl on /dev/drm. |
| * |
| * \param inode device inode. |
| * \param filp file pointer. |
| * \param cmd command. |
| * \param arg user argument. |
| * \return zero on success or negative number on failure. |
| * |
| * Looks up the ioctl function in the ::ioctls table, checking for root |
| * previleges if so required, and dispatches to the respective function. |
| */ |
| int drm_ioctl(struct inode *inode, struct file *filp, |
| unsigned int cmd, unsigned long arg) |
| { |
| drm_file_t *priv = filp->private_data; |
| drm_device_t *dev = priv->head->dev; |
| drm_ioctl_desc_t *ioctl; |
| drm_ioctl_t *func; |
| unsigned int nr = DRM_IOCTL_NR(cmd); |
| int retcode = -EINVAL; |
| |
| atomic_inc(&dev->ioctl_count); |
| atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]); |
| ++priv->ioctl_count; |
| |
| DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n", |
| current->pid, cmd, nr, |
| (long)old_encode_dev(priv->head->device), |
| priv->authenticated); |
| |
| if ((nr >= DRIVER_IOCTL_COUNT) && |
| ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END))) |
| goto err_i1; |
| if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) |
| && (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) |
| ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE]; |
| else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) |
| ioctl = &drm_ioctls[nr]; |
| else |
| goto err_i1; |
| |
| func = ioctl->func; |
| /* is there a local override? */ |
| if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) |
| func = dev->driver->dma_ioctl; |
| |
| if (!func) { |
| DRM_DEBUG("no function\n"); |
| retcode = -EINVAL; |
| } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) || |
| ((ioctl->flags & DRM_AUTH) && !priv->authenticated) || |
| ((ioctl->flags & DRM_MASTER) && !priv->master)) { |
| retcode = -EACCES; |
| } else { |
| retcode = func(inode, filp, cmd, arg); |
| } |
| |
| err_i1: |
| atomic_dec(&dev->ioctl_count); |
| if (retcode) |
| DRM_DEBUG("ret = %x\n", retcode); |
| return retcode; |
| } |
| |
| EXPORT_SYMBOL(drm_ioctl); |