linux-imx

/*

 * Copyright (C) 2012 Red Hat

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License v2. See the file COPYING in the main directory of this archive for

 * more details.

 */

​

#include <drm/drmP.h>

#include "udl_drv.h"

#include <linux/shmem_fs.h>

#include <linux/dma-buf.h>

​

struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,

                        size_t size)

{

    struct udl_gem_object *obj;

​

    obj = kzalloc(sizeof(*obj), GFP_KERNEL);

    if (obj == NULL)

        return NULL;

​

    if (drm_gem_object_init(dev, &obj->base, size) != 0) {

        kfree(obj);

        return NULL;

    }

​

    obj->flags = UDL_BO_CACHEABLE;

    return obj;

}

​

static int

udl_gem_create(struct drm_file *file,

           struct drm_device *dev,

           uint64_t size,

           uint32_t *handle_p)

{

    struct udl_gem_object *obj;

    int ret;

    u32 handle;

​

    size = roundup(size, PAGE_SIZE);

​

    obj = udl_gem_alloc_object(dev, size);

    if (obj == NULL)

        return -ENOMEM;

​

    ret = drm_gem_handle_create(file, &obj->base, &handle);

    if (ret) {

        drm_gem_object_release(&obj->base);

        kfree(obj);

        return ret;

    }

​

    drm_gem_object_put_unlocked(&obj->base);

    *handle_p = handle;

    return 0;

}

​

static void update_vm_cache_attr(struct udl_gem_object *obj,

                 struct vm_area_struct *vma)

{

    DRM_DEBUG_KMS("flags = 0x%x\n", obj->flags);