| /* |
| * 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 <drm/drmP.h> |
| |
| #include "amdgpu.h" |
| #include <drm/amdgpu_drm.h> |
| #include <linux/dma-buf.h> |
| |
| struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| int npages = bo->tbo.num_pages; |
| |
| return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); |
| } |
| |
| void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| int ret; |
| |
| ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, |
| &bo->dma_buf_vmap); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| return bo->dma_buf_vmap.virtual; |
| } |
| |
| void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| |
| ttm_bo_kunmap(&bo->dma_buf_vmap); |
| } |
| |
| struct drm_gem_object *amdgpu_gem_prime_import_sg_table(struct drm_device *dev, |
| struct dma_buf_attachment *attach, |
| struct sg_table *sg) |
| { |
| struct reservation_object *resv = attach->dmabuf->resv; |
| struct amdgpu_device *adev = dev->dev_private; |
| struct amdgpu_bo *bo; |
| int ret; |
| |
| ww_mutex_lock(&resv->lock, NULL); |
| ret = amdgpu_bo_create(adev, attach->dmabuf->size, PAGE_SIZE, false, |
| AMDGPU_GEM_DOMAIN_GTT, 0, sg, resv, &bo); |
| ww_mutex_unlock(&resv->lock); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| mutex_lock(&adev->gem.mutex); |
| list_add_tail(&bo->list, &adev->gem.objects); |
| mutex_unlock(&adev->gem.mutex); |
| |
| return &bo->gem_base; |
| } |
| |
| int amdgpu_gem_prime_pin(struct drm_gem_object *obj) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| int ret = 0; |
| |
| ret = amdgpu_bo_reserve(bo, false); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| /* pin buffer into GTT */ |
| ret = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL); |
| amdgpu_bo_unreserve(bo); |
| return ret; |
| } |
| |
| void amdgpu_gem_prime_unpin(struct drm_gem_object *obj) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| int ret = 0; |
| |
| ret = amdgpu_bo_reserve(bo, false); |
| if (unlikely(ret != 0)) |
| return; |
| |
| amdgpu_bo_unpin(bo); |
| amdgpu_bo_unreserve(bo); |
| } |
| |
| struct reservation_object *amdgpu_gem_prime_res_obj(struct drm_gem_object *obj) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); |
| |
| return bo->tbo.resv; |
| } |
| |
| struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev, |
| struct drm_gem_object *gobj, |
| int flags) |
| { |
| struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj); |
| |
| if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm)) |
| return ERR_PTR(-EPERM); |
| |
| return drm_gem_prime_export(dev, gobj, flags); |
| } |