path: root/drivers/char/drm/drm_ioc32.c

/**
 * \file drm_ioc32.c
 *
 * 32-bit ioctl compatibility routines for the DRM.
 *
 * \author Paul Mackerras <paulus@samba.org>
 *
 * Copyright (C) Paul Mackerras 2005.
 * 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
 * THE AUTHOR 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/compat.h>

#include "drmP.h"
#include "drm_core.h"

#define DRM_IOCTL_VERSION32		DRM_IOWR(0x00, drm_version32_t)
#define DRM_IOCTL_GET_UNIQUE32		DRM_IOWR(0x01, drm_unique32_t)
#define DRM_IOCTL_GET_MAP32		DRM_IOWR(0x04, drm_map32_t)
#define DRM_IOCTL_GET_CLIENT32		DRM_IOWR(0x05, drm_client32_t)
#define DRM_IOCTL_GET_STATS32		DRM_IOR( 0x06, drm_stats32_t)

#define DRM_IOCTL_SET_UNIQUE32		DRM_IOW( 0x10, drm_unique32_t)
#define DRM_IOCTL_ADD_MAP32		DRM_IOWR(0x15, drm_map32_t)
#define DRM_IOCTL_ADD_BUFS32		DRM_IOWR(0x16, drm_buf_desc32_t)
#define DRM_IOCTL_MARK_BUFS32		DRM_IOW( 0x17, drm_buf_desc32_t)
#define DRM_IOCTL_INFO_BUFS32		DRM_IOWR(0x18, drm_buf_info32_t)
#define DRM_IOCTL_MAP_BUFS32		DRM_IOWR(0x19, drm_buf_map32_t)
#define DRM_IOCTL_FREE_BUFS32		DRM_IOW( 0x1a, drm_buf_free32_t)

#define DRM_IOCTL_RM_MAP32		DRM_IOW( 0x1b, drm_map32_t)

#define DRM_IOCTL_SET_SAREA_CTX32	DRM_IOW( 0x1c, drm_ctx_priv_map32_t)
#define DRM_IOCTL_GET_SAREA_CTX32	DRM_IOWR(0x1d, drm_ctx_priv_map32_t)

#define DRM_IOCTL_RES_CTX32		DRM_IOWR(0x26, drm_ctx_res32_t)
#define DRM_IOCTL_DMA32			DRM_IOWR(0x29, drm_dma32_t)

#define DRM_IOCTL_AGP_ENABLE32		DRM_IOW( 0x32, drm_agp_mode32_t)
#define DRM_IOCTL_AGP_INFO32		DRM_IOR( 0x33, drm_agp_info32_t)
#define DRM_IOCTL_AGP_ALLOC32		DRM_IOWR(0x34, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_FREE32		DRM_IOW( 0x35, drm_agp_buffer32_t)
#define DRM_IOCTL_AGP_BIND32		DRM_IOW( 0x36, drm_agp_binding32_t)
#define DRM_IOCTL_AGP_UNBIND32		DRM_IOW( 0x37, drm_agp_binding32_t)

#define DRM_IOCTL_SG_ALLOC32		DRM_IOW( 0x38, drm_scatter_gather32_t)
#define DRM_IOCTL_SG_FREE32		DRM_IOW( 0x39, drm_scatter_gather32_t)

#define DRM_IOCTL_WAIT_VBLANK32		DRM_IOWR(0x3a, drm_wait_vblank32_t)

typedef struct drm_version_32 {
	int version_major;	  /**< Major version */
	int version_minor;	  /**< Minor version */
	int version_patchlevel;	   /**< Patch level */
	u32 name_len;		  /**< Length of name buffer */
	u32 name;		  /**< Name of driver */
	u32 date_len;		  /**< Length of date buffer */
	u32 date;		  /**< User-space buffer to hold date */
	u32 desc_len;		  /**< Length of desc buffer */
	u32 desc;		  /**< User-space buffer to hold desc */
} drm_version32_t;

static int compat_drm_version(struct file *file, unsigned int cmd,
			      unsigned long arg)
{
	drm_version32_t v32;
	struct drm_version __user *version;
	int err;

	if (copy_from_user(&v32, (void __user *)arg, sizeof(v32)))
		return -EFAULT;

	version = compat_alloc_user_space(sizeof(*version));
	if (!access_ok(VERIFY_WRITE, version, sizeof(*version)))
		return -EFAULT;
	if (__put_user(v32.name_len, &version->name_len)
	    || __put_user((void __user *)(unsigned long)v32.name,
			  &version->name)
	    || __put_user(v32.date_len, &version->date_len)
	    || __put_user((void __user *)(unsigned long)v32.date,
			  &version->date)
	    || __put_user(v32.desc_len, &version->desc_len)
	    || __put_user((void __user *)(unsigned long)v32.desc,
			  &version->desc))
		return -EFAULT;

	err = drm_ioctl(file->f_path.dentry->d_inode, file,
			DRM_IOCTL_VERSION, (unsigned long)version);
	if (err)
		return err;

	if (__get_user(v32.version_major, &version->version_major)
	    || __get_user(v32.version_minor, &version->version_minor)
	    || __get_user(v32.version_patchlevel, &version->version_patchlevel)
	    || __get_user(v32.name_len, &version->name_len)
	    || __get_user(v32.date_len, &version->date_len)
	    || __get_user(v32.desc_len, &version->desc_len))
		return -EFAULT;

	if (copy_to_user((void __user *)arg, &v32, sizeof(v32)))
		return -EFAULT;
	return 0;
}

typedef struct drm_unique32 {
	u32 unique_len;	/**< Length of unique */
	u32 unique;	/**< Unique name for driver instantiation */
} drm_unique32_t;

static int compat_drm_getunique(struct file *file, unsigned int cmd,
				unsigned long arg)
{
	drm_unique32_t uq32;
	struct drm_unique __user *u;
	int err;

	if (copy_from_user(&uq32, (void __user *)arg, <