mirror of https://gitee.com/openkylin/linux.git
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*
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* Copyright 2012 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* based on nouveau_prime.c
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*
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* Authors: Alex Deucher
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*/
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#include <linux/dma-buf.h>
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#include <drm/drm_prime.h>
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#include <drm/radeon_drm.h>
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#include "radeon.h"
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struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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int npages = bo->tbo.num_pages;
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return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
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}
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void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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int ret;
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ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
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&bo->dma_buf_vmap);
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if (ret)
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return ERR_PTR(ret);
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return bo->dma_buf_vmap.virtual;
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}
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void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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ttm_bo_kunmap(&bo->dma_buf_vmap);
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}
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struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sg)
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{
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struct reservation_object *resv = attach->dmabuf->resv;
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struct radeon_device *rdev = dev->dev_private;
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struct radeon_bo *bo;
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int ret;
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ww_mutex_lock(&resv->lock, NULL);
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ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
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RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
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ww_mutex_unlock(&resv->lock);
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if (ret)
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return ERR_PTR(ret);
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mutex_lock(&rdev->gem.mutex);
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list_add_tail(&bo->list, &rdev->gem.objects);
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mutex_unlock(&rdev->gem.mutex);
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bo->prime_shared_count = 1;
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return &bo->gem_base;
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}
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int radeon_gem_prime_pin(struct drm_gem_object *obj)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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int ret = 0;
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ret = radeon_bo_reserve(bo, false);
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if (unlikely(ret != 0))
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return ret;
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/* pin buffer into GTT */
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ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
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if (likely(ret == 0))
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bo->prime_shared_count++;
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radeon_bo_unreserve(bo);
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return ret;
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}
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void radeon_gem_prime_unpin(struct drm_gem_object *obj)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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int ret = 0;
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ret = radeon_bo_reserve(bo, false);
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if (unlikely(ret != 0))
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return;
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radeon_bo_unpin(bo);
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if (bo->prime_shared_count)
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bo->prime_shared_count--;
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radeon_bo_unreserve(bo);
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}
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struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(obj);
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return bo->tbo.resv;
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}
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struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,
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int flags)
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{
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struct radeon_bo *bo = gem_to_radeon_bo(gobj);
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if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
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return ERR_PTR(-EPERM);
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return drm_gem_prime_export(gobj, flags);
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}
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