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1/*2 * Copyright 2012 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * based on nouveau_prime.c23 *24 * Authors: Alex Deucher25 */26 27#include <linux/dma-buf.h>28 29#include <drm/drm_prime.h>30#include <drm/radeon_drm.h>31 32#include <drm/ttm/ttm_tt.h>33 34#include "radeon.h"35#include "radeon_prime.h"36 37struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)38{39 struct radeon_bo *bo = gem_to_radeon_bo(obj);40 41 return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages,42 bo->tbo.ttm->num_pages);43}44 45struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,46 struct dma_buf_attachment *attach,47 struct sg_table *sg)48{49 struct dma_resv *resv = attach->dmabuf->resv;50 struct radeon_device *rdev = dev->dev_private;51 struct radeon_bo *bo;52 int ret;53 54 dma_resv_lock(resv, NULL);55 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,56 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);57 dma_resv_unlock(resv);58 if (ret)59 return ERR_PTR(ret);60 61 bo->tbo.base.funcs = &radeon_gem_object_funcs;62 63 mutex_lock(&rdev->gem.mutex);64 list_add_tail(&bo->list, &rdev->gem.objects);65 mutex_unlock(&rdev->gem.mutex);66 67 bo->prime_shared_count = 1;68 return &bo->tbo.base;69}70 71int radeon_gem_prime_pin(struct drm_gem_object *obj)72{73 struct radeon_bo *bo = gem_to_radeon_bo(obj);74 int ret = 0;75 76 /* pin buffer into GTT */77 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);78 if (likely(ret == 0))79 bo->prime_shared_count++;80 81 return ret;82}83 84void radeon_gem_prime_unpin(struct drm_gem_object *obj)85{86 struct radeon_bo *bo = gem_to_radeon_bo(obj);87 88 radeon_bo_unpin(bo);89 if (bo->prime_shared_count)90 bo->prime_shared_count--;91}92 93 94struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,95 int flags)96{97 struct radeon_bo *bo = gem_to_radeon_bo(gobj);98 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))99 return ERR_PTR(-EPERM);100 return drm_gem_prime_export(gobj, flags);101}102