linux-imx

/**

 * \file drm_vm.c

 * Memory mapping for DRM

 *

 * \author Rickard E. (Rik) Faith <faith@valinux.com>

 * \author Gareth Hughes <gareth@valinux.com>

 */

​

/*

 * Created: Mon Jan  4 08:58:31 1999 by faith@valinux.com

 *

 * Copyright 1999 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 <drm/drmP.h>

#include <linux/export.h>

#include <linux/seq_file.h>

#if defined(__ia64__)

#include <linux/efi.h>

#include <linux/slab.h>

#endif

#include <linux/mem_encrypt.h>

#include <asm/pgtable.h>

#include "drm_internal.h"

#include "drm_legacy.h"

​

struct drm_vma_entry {

    struct list_head head;

    struct vm_area_struct *vma;

    pid_t pid;

};

​

static void drm_vm_open(struct vm_area_struct *vma);

static void drm_vm_close(struct vm_area_struct *vma);

​

static pgprot_t drm_io_prot(struct drm_local_map *map,

                struct vm_area_struct *vma)

{

    pgprot_t tmp = vm_get_page_prot(vma->vm_flags);

​

    /* We don't want graphics memory to be mapped encrypted */

    tmp = pgprot_decrypted(tmp);