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/*
* Copyright © 2012 Intel Corporation
* Copyright © 2014 The Chromium OS Authors
*
* 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Ben Widawsky <ben@bwidawsk.net>
*
*/
#include <linux/dma-buf.h>
#include "vgem_drv.h"
struct sg_table *vgem_gem_prime_get_sg_table(struct drm_gem_object *gobj)
{
struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
BUG_ON(obj->pages == NULL);
return drm_prime_pages_to_sg(obj->pages, obj->base.size / PAGE_SIZE);
}
int vgem_gem_prime_pin(struct drm_gem_object *gobj)
{
struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
return vgem_gem_get_pages(obj);
}
void vgem_gem_prime_unpin(struct drm_gem_object *gobj)
{
struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
vgem_gem_put_pages(obj);
}
void *vgem_gem_prime_vmap(struct drm_gem_object *gobj)
{
struct drm_vgem_gem_object *obj = to_vgem_bo(gobj);
BUG_ON(obj->pages == NULL);
return vmap(obj->pages, obj->base.size / PAGE_SIZE, 0, PAGE_KERNEL);
}
void vgem_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
{
vunmap(vaddr);
}
struct drm_gem_object *vgem_gem_prime_import(struct drm_device *dev,
struct dma_buf *dma_buf)
{
struct drm_vgem_gem_object *obj = NULL;
int ret;
obj = kzalloc(sizeof(*obj), GFP_KERNEL);
if (obj == NULL) {
ret = -ENOMEM;
goto fail;
}
ret = drm_gem_object_init(dev, &obj->base, dma_buf->size);
if (ret) {
ret = -ENOMEM;
goto fail_free;
}
get_dma_buf(dma_buf);
obj->base.dma_buf = dma_buf;
obj->use_dma_buf = true;
return &obj->base;
fail_free:
kfree(obj);
fail:
return ERR_PTR(ret);
}
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