linux-imx

/*

 * AGPGART driver frontend compatibility ioctls

 * Copyright (C) 2004 Silicon Graphics, Inc.

 * Copyright (C) 2002-2003 Dave Jones

 * Copyright (C) 1999 Jeff Hartmann

 * Copyright (C) 1999 Precision Insight, Inc.

 * Copyright (C) 1999 Xi Graphics, Inc.

 *

 * 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 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

 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS 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/kernel.h>

#include <linux/pci.h>

#include <linux/fs.h>

#include <linux/agpgart.h>

#include <linux/slab.h>

#include <linux/uaccess.h>

#include "agp.h"

#include "compat_ioctl.h"

​

static int compat_agpioc_info_wrap(struct agp_file_private *priv, void __user *arg)

{

    struct agp_info32 userinfo;

    struct agp_kern_info kerninfo;

​

    agp_copy_info(agp_bridge, &kerninfo);

​

    userinfo.version.major = kerninfo.version.major;

    userinfo.version.minor = kerninfo.version.minor;

    userinfo.bridge_id = kerninfo.device->vendor |

        (kerninfo.device->device << 16);

    userinfo.agp_mode = kerninfo.mode;

    userinfo.aper_base = (compat_long_t)kerninfo.aper_base;

    userinfo.aper_size = kerninfo.aper_size;

    userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory;

    userinfo.pg_used = kerninfo.current_memory;

​

    if (copy_to_user(arg, &userinfo, sizeof(userinfo)))

        return -EFAULT;

​

    return 0;

}

​

static int compat_agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg)

{

    struct agp_region32 ureserve;

    struct agp_region kreserve;

    struct agp_client *client;

    struct agp_file_private *client_priv;

​

    DBG("");

    if (copy_from_user(&ureserve, arg, sizeof(ureserve)))

        return -EFAULT;

​

    if ((unsigned) ureserve.seg_count >= ~0U/sizeof(struct agp_segment32))

        return -EFAULT;

​

    kreserve.pid = ureserve.pid;

    kreserve.seg_count = ureserve.seg_count;

​

    client = agp_find_client_by_pid(kreserve.pid);

​

    if (kreserve.seg_count == 0) {

        /* remove a client */

        client_priv = agp_find_private(kreserve.pid);

​

        if (client_priv != NULL) {

            set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags);

            set_bit(AGP_FF_IS_VALID, &client_priv->access_flags);

        }

        if (client == NULL) {

            /* client is already removed */

            return 0;

        }

        return agp_remove_client(kreserve.pid);