mirror of https://gitee.com/openkylin/linux.git
415 lines
15 KiB
C
415 lines
15 KiB
C
/**
|
|
* \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 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 <linux/debugfs.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/export.h>
|
|
#include <drm/drmP.h>
|
|
#include <drm/drm_core.h>
|
|
|
|
|
|
static int drm_version(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv);
|
|
|
|
#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
|
|
[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
|
|
|
|
/** Ioctl table */
|
|
static const struct drm_ioctl_desc drm_ioctls[] = {
|
|
DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_getmap, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CLIENT, drm_getclient, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_STATS, drm_getstats, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CAP, drm_getcap, DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_CLIENT_CAP, drm_setclientcap, 0),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_VERSION, drm_setversion, DRM_MASTER),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_UNIQUE, drm_setunique, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_BLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_UNBLOCK, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AUTH_MAGIC, drm_authmagic, DRM_AUTH|DRM_MASTER),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_MAP, drm_addmap_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RM_MAP, drm_rmmap_ioctl, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_SAREA_CTX, drm_setsareactx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_SAREA_CTX, drm_getsareactx, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SET_MASTER, drm_setmaster_ioctl, DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_DROP_MASTER, drm_dropmaster_ioctl, DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_CTX, drm_addctx, DRM_AUTH|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RM_CTX, drm_rmctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MOD_CTX, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GET_CTX, drm_getctx, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SWITCH_CTX, drm_switchctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_NEW_CTX, drm_newctx, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RES_CTX, drm_resctx, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_RM_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_LOCK, drm_lock, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_UNLOCK, drm_unlock, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_FINISH, drm_noop, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_ADD_BUFS, drm_addbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MARK_BUFS, drm_markbufs, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_INFO_BUFS, drm_infobufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MAP_BUFS, drm_mapbufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_FREE_BUFS, drm_freebufs, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_DMA, drm_dma_ioctl, DRM_AUTH),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_CONTROL, drm_control, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
#if __OS_HAS_AGP
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ACQUIRE, drm_agp_acquire_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_RELEASE, drm_agp_release_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ENABLE, drm_agp_enable_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_INFO, drm_agp_info_ioctl, DRM_AUTH),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_ALLOC, drm_agp_alloc_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_FREE, drm_agp_free_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_BIND, drm_agp_bind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_AGP_UNBIND, drm_agp_unbind_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
#endif
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SG_ALLOC, drm_sg_alloc, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_SG_FREE, drm_sg_free, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_WAIT_VBLANK, drm_wait_vblank, DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODESET_CTL, drm_modeset_ctl, 0),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_UPDATE_DRAW, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_CLOSE, drm_gem_close_ioctl, DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_FLINK, drm_gem_flink_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_GEM_OPEN, drm_gem_open_ioctl, DRM_AUTH|DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETRESOURCES, drm_mode_getresources, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_HANDLE_TO_FD, drm_prime_handle_to_fd_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_PRIME_FD_TO_HANDLE, drm_prime_fd_to_handle_ioctl, DRM_AUTH|DRM_UNLOCKED|DRM_RENDER_ALLOW),
|
|
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANERESOURCES, drm_mode_getplane_res, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCRTC, drm_mode_getcrtc, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETCRTC, drm_mode_setcrtc, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPLANE, drm_mode_getplane, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPLANE, drm_mode_setplane, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR, drm_mode_cursor_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETGAMMA, drm_mode_gamma_get_ioctl, DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETGAMMA, drm_mode_gamma_set_ioctl, DRM_MASTER|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETENCODER, drm_mode_getencoder, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETCONNECTOR, drm_mode_getconnector, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ATTACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DETACHMODE, drm_noop, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPERTY, drm_mode_getproperty_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_SETPROPERTY, drm_mode_connector_property_set_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETPROPBLOB, drm_mode_getblob_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_GETFB, drm_mode_getfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB, drm_mode_addfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_ADDFB2, drm_mode_addfb2, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_RMFB, drm_mode_rmfb, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_PAGE_FLIP, drm_mode_page_flip_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DIRTYFB, drm_mode_dirtyfb_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CREATE_DUMB, drm_mode_create_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_MAP_DUMB, drm_mode_mmap_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_DESTROY_DUMB, drm_mode_destroy_dumb_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_GETPROPERTIES, drm_mode_obj_get_properties_ioctl, DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_OBJ_SETPROPERTY, drm_mode_obj_set_property_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
DRM_IOCTL_DEF(DRM_IOCTL_MODE_CURSOR2, drm_mode_cursor2_ioctl, DRM_MASTER|DRM_CONTROL_ALLOW|DRM_UNLOCKED),
|
|
};
|
|
|
|
#define DRM_CORE_IOCTL_COUNT ARRAY_SIZE( drm_ioctls )
|
|
|
|
/** File operations structure */
|
|
static const struct file_operations drm_stub_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = drm_stub_open,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static int __init drm_core_init(void)
|
|
{
|
|
int ret = -ENOMEM;
|
|
|
|
drm_global_init();
|
|
drm_connector_ida_init();
|
|
idr_init(&drm_minors_idr);
|
|
|
|
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_debugfs_root = debugfs_create_dir("dri", NULL);
|
|
if (!drm_debugfs_root) {
|
|
DRM_ERROR("Cannot create /sys/kernel/debug/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();
|
|
err_p2:
|
|
unregister_chrdev(DRM_MAJOR, "drm");
|
|
|
|
idr_destroy(&drm_minors_idr);
|
|
err_p1:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit drm_core_exit(void)
|
|
{
|
|
debugfs_remove(drm_debugfs_root);
|
|
drm_sysfs_destroy();
|
|
|
|
unregister_chrdev(DRM_MAJOR, "drm");
|
|
|
|
drm_connector_ida_destroy();
|
|
idr_destroy(&drm_minors_idr);
|
|
}
|
|
|
|
module_init(drm_core_init);
|
|
module_exit(drm_core_exit);
|
|
|
|
/**
|
|
* Copy and IOCTL return string to user space
|
|
*/
|
|
static int drm_copy_field(char *buf, size_t *buf_len, const char *value)
|
|
{
|
|
int len;
|
|
|
|
/* don't overflow userbuf */
|
|
len = strlen(value);
|
|
if (len > *buf_len)
|
|
len = *buf_len;
|
|
|
|
/* let userspace know exact length of driver value (which could be
|
|
* larger than the userspace-supplied buffer) */
|
|
*buf_len = strlen(value);
|
|
|
|
/* finally, try filling in the userbuf */
|
|
if (len && buf)
|
|
if (copy_to_user(buf, value, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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 drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_version *version = data;
|
|
int err;
|
|
|
|
version->version_major = dev->driver->major;
|
|
version->version_minor = dev->driver->minor;
|
|
version->version_patchlevel = dev->driver->patchlevel;
|
|
err = drm_copy_field(version->name, &version->name_len,
|
|
dev->driver->name);
|
|
if (!err)
|
|
err = drm_copy_field(version->date, &version->date_len,
|
|
dev->driver->date);
|
|
if (!err)
|
|
err = drm_copy_field(version->desc, &version->desc_len,
|
|
dev->driver->desc);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* Called whenever a process performs an ioctl on /dev/drm.
|
|
*
|
|
* \param inode device inode.
|
|
* \param file_priv DRM file private.
|
|
* \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.
|
|
*/
|
|
long drm_ioctl(struct file *filp,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct drm_file *file_priv = filp->private_data;
|
|
struct drm_device *dev;
|
|
const struct drm_ioctl_desc *ioctl = NULL;
|
|
drm_ioctl_t *func;
|
|
unsigned int nr = DRM_IOCTL_NR(cmd);
|
|
int retcode = -EINVAL;
|
|
char stack_kdata[128];
|
|
char *kdata = NULL;
|
|
unsigned int usize, asize;
|
|
|
|
dev = file_priv->minor->dev;
|
|
|
|
if (drm_device_is_unplugged(dev))
|
|
return -ENODEV;
|
|
|
|
if ((nr >= DRM_CORE_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)) {
|
|
u32 drv_size;
|
|
ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
|
|
drv_size = _IOC_SIZE(ioctl->cmd_drv);
|
|
usize = asize = _IOC_SIZE(cmd);
|
|
if (drv_size > asize)
|
|
asize = drv_size;
|
|
cmd = ioctl->cmd_drv;
|
|
}
|
|
else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
|
|
u32 drv_size;
|
|
|
|
ioctl = &drm_ioctls[nr];
|
|
|
|
drv_size = _IOC_SIZE(ioctl->cmd);
|
|
usize = asize = _IOC_SIZE(cmd);
|
|
if (drv_size > asize)
|
|
asize = drv_size;
|
|
|
|
cmd = ioctl->cmd;
|
|
} else
|
|
goto err_i1;
|
|
|
|
DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
|
|
task_pid_nr(current),
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
|
file_priv->authenticated, ioctl->name);
|
|
|
|
/* Do not trust userspace, use our own definition */
|
|
func = ioctl->func;
|
|
|
|
if (!func) {
|
|
DRM_DEBUG("no function\n");
|
|
retcode = -EINVAL;
|
|
} else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
|
|
((ioctl->flags & DRM_AUTH) && !drm_is_render_client(file_priv) && !file_priv->authenticated) ||
|
|
((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
|
|
(!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL)) ||
|
|
(!(ioctl->flags & DRM_RENDER_ALLOW) && drm_is_render_client(file_priv))) {
|
|
retcode = -EACCES;
|
|
} else {
|
|
if (cmd & (IOC_IN | IOC_OUT)) {
|
|
if (asize <= sizeof(stack_kdata)) {
|
|
kdata = stack_kdata;
|
|
} else {
|
|
kdata = kmalloc(asize, GFP_KERNEL);
|
|
if (!kdata) {
|
|
retcode = -ENOMEM;
|
|
goto err_i1;
|
|
}
|
|
}
|
|
if (asize > usize)
|
|
memset(kdata + usize, 0, asize - usize);
|
|
}
|
|
|
|
if (cmd & IOC_IN) {
|
|
if (copy_from_user(kdata, (void __user *)arg,
|
|
usize) != 0) {
|
|
retcode = -EFAULT;
|
|
goto err_i1;
|
|
}
|
|
} else
|
|
memset(kdata, 0, usize);
|
|
|
|
if (ioctl->flags & DRM_UNLOCKED)
|
|
retcode = func(dev, kdata, file_priv);
|
|
else {
|
|
mutex_lock(&drm_global_mutex);
|
|
retcode = func(dev, kdata, file_priv);
|
|
mutex_unlock(&drm_global_mutex);
|
|
}
|
|
|
|
if (cmd & IOC_OUT) {
|
|
if (copy_to_user((void __user *)arg, kdata,
|
|
usize) != 0)
|
|
retcode = -EFAULT;
|
|
}
|
|
}
|
|
|
|
err_i1:
|
|
if (!ioctl)
|
|
DRM_DEBUG("invalid ioctl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
|
|
task_pid_nr(current),
|
|
(long)old_encode_dev(file_priv->minor->kdev->devt),
|
|
file_priv->authenticated, cmd, nr);
|
|
|
|
if (kdata != stack_kdata)
|
|
kfree(kdata);
|
|
if (retcode)
|
|
DRM_DEBUG("ret = %d\n", retcode);
|
|
return retcode;
|
|
}
|
|
EXPORT_SYMBOL(drm_ioctl);
|