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drm/linux-core/drm_drv.c

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/**
* \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 void drm_cleanup(drm_device_t * dev);
int drm_fb_loaded = 0;
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_MASTER|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_FENCE)] = {drm_fence_ioctl, DRM_AUTH},
[DRM_IOCTL_NR(DRM_IOCTL_TTM)] = {drm_ttm_ioctl, DRM_AUTH},
[DRM_IOCTL_NR(DRM_IOCTL_BUFOBJ)] = {drm_bo_ioctl, DRM_AUTH},
[DRM_IOCTL_NR(DRM_IOCTL_MM_INIT)] = {drm_mm_init_ioctl,
DRM_AUTH },
[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);
if (dev->unique) {
drm_free(dev->unique, strlen(dev->unique) + 1, DRM_MEM_DRIVER);
dev->unique = NULL;
dev->unique_len = 0;
}
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);
if (drm_bo_clean_mm(dev)) {
DRM_ERROR("DRM memory manager still busy. "
"System is unstable. Please reboot.\n");
}
DRM_DEBUG("lastclose completed\n");
return 0;
}
void drm_cleanup_pci(struct pci_dev *pdev)
{
drm_device_t *dev = pci_get_drvdata(pdev);
pci_set_drvdata(pdev, NULL);
pci_release_regions(pdev);
if (dev)
drm_cleanup(dev);
}
EXPORT_SYMBOL(drm_cleanup_pci);
/**
* 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_device_id *pciidlist)
{
struct pci_dev *pdev;
struct pci_device_id *pid;
int rc, i;
DRM_DEBUG("\n");
for (i = 0; (pciidlist[i].vendor != 0) && !drm_fb_loaded; i++) {
pid = &pciidlist[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))) {
/* is there already a driver loaded, or (short circuit saves work) */
/* does something like VesaFB have control of the memory region? */
if (pci_dev_driver(pdev)
|| pci_request_regions(pdev, "DRM scan")) {
/* go into stealth mode */
drm_fb_loaded = 1;
pci_dev_put(pdev);
break;
}
/* no fbdev or vesadev, put things back and wait for normal probe */
pci_release_regions(pdev);
}
}
if (!drm_fb_loaded)
pci_register_driver(&driver->pci_driver);
else {
for (i = 0; pciidlist[i].vendor != 0; i++) {
pid = &pciidlist[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))) {
/* stealth mode requires a manual probe */
pci_dev_get(pdev);
if ((rc = drm_get_dev(pdev, &pciidlist[i], driver))) {
pci_dev_put(pdev);
return rc;
}
}
}
DRM_INFO("Used old pci detect: framebuffer loaded\n");
}
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);
drm_fence_manager_takedown(dev);
if (dev->maplist) {
drm_free(dev->maplist, sizeof(*dev->maplist), DRM_MEM_MAPS);
dev->maplist = NULL;
drm_ht_remove(&dev->map_hash);
drm_ht_remove(&dev->object_hash);
}
if (!drm_fb_loaded)
pci_disable_device(dev->pdev);
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");
if (drm_fb_loaded) {
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);
}
}
} else
pci_unregister_driver(&driver->pci_driver);
DRM_INFO("Module unloaded\n");
}
EXPORT_SYMBOL(drm_exit);
/** File operations structure */
static struct file_operations drm_stub_fops = {
.owner = THIS_MODULE,
.open = drm_stub_open
};
static int drm_create_memory_caches(void)
{
drm_cache.mm = kmem_cache_create("drm_mm_node_t",
sizeof(drm_mm_node_t),
0,
SLAB_HWCACHE_ALIGN,
NULL,NULL);
if (!drm_cache.mm)
return -ENOMEM;
drm_cache.fence_object= kmem_cache_create("drm_fence_object_t",
sizeof(drm_fence_object_t),
0,
SLAB_HWCACHE_ALIGN,
NULL,NULL);
if (!drm_cache.fence_object)
return -ENOMEM;
drm_cache.ref_object= kmem_cache_create("drm_ref_object_t",
sizeof(drm_ref_object_t),
0,
SLAB_HWCACHE_ALIGN,
NULL,NULL);
if (!drm_cache.ref_object)
return -ENOMEM;
return 0;
}
static void drm_free_mem_cache(kmem_cache_t *cache,
const char *name)
{
if (!cache)
return;
if (kmem_cache_destroy(cache)) {
DRM_ERROR("Warning! DRM is leaking %s memory.\n",
name);
}
}
static void drm_free_memory_caches(void )
{
drm_free_mem_cache(drm_cache.ref_object, "ref object");
drm_cache.ref_object = NULL;
drm_free_mem_cache(drm_cache.fence_object, "fence object");
drm_cache.fence_object = NULL;
drm_free_mem_cache(drm_cache.mm, "memory manager block");
drm_cache.mm = NULL;
}
static int __init drm_core_init(void)
{
int ret;
ret = drm_create_memory_caches();
if (ret)
goto err_p1;
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_mem_init();
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:
drm_free_memory_caches();
return ret;
}
static void __exit drm_core_exit(void)
{
drm_free_memory_caches();
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;
if ((nr == DRM_IOCTL_NR(DRM_IOCTL_DMA)) && dev->driver->dma_ioctl) /* Local override? */
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);
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