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/*
* Copyright 2012 Advanced Micro Devices, 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
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
*
* based on nouveau_prime.c
*
* Authors: Alex Deucher
*/
#include <linux/dma-buf.h>
#include <drm/drm_prime.h>
#include <drm/radeon_drm.h>
#include <drm/ttm/ttm_tt.h>
#include "radeon.h"
#include "radeon_prime.h"
struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
{
struct radeon_bo *bo = gem_to_radeon_bo(obj);
return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages,
bo->tbo.ttm->num_pages);
}
struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
struct sg_table *sg)
{
struct dma_resv *resv = attach->dmabuf->resv;
struct radeon_device *rdev = dev->dev_private;
struct radeon_bo *bo;
int ret;
dma_resv_lock(resv, NULL);
ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
dma_resv_unlock(resv);
if (ret)
return ERR_PTR(ret);
bo->tbo.base.funcs = &radeon_gem_object_funcs;
mutex_lock(&rdev->gem.mutex);
list_add_tail(&bo->list, &rdev->gem.objects);
mutex_unlock(&rdev->gem.mutex);
bo->prime_shared_count = 1;
return &bo->tbo.base;
}
int radeon_gem_prime_pin(struct drm_gem_object *obj)
{
struct radeon_bo *bo = gem_to_radeon_bo(obj);
int ret = 0;
ret = radeon_bo_reserve(bo, false);
if (unlikely(ret != 0))
return ret;
/* pin buffer into GTT */
ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
if (likely(ret == 0))
bo->prime_shared_count++;
radeon_bo_unreserve(bo);
return ret;
}
void radeon_gem_prime_unpin(struct drm_gem_object *obj)
{
struct radeon_bo *bo = gem_to_radeon_bo(obj);
int ret = 0;
ret = radeon_bo_reserve(bo, false);
if (unlikely(ret != 0))
return;
radeon_bo_unpin(bo);
if (bo->prime_shared_count)
bo->prime_shared_count--;
radeon_bo_unreserve(bo);
}
struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,
int flags)
{
struct radeon_bo *bo = gem_to_radeon_bo(gobj);
if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
return ERR_PTR(-EPERM);
return drm_gem_prime_export(gobj, flags);
}
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