1 /* 2 * Copyright 2012 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * based on nouveau_prime.c 23 * 24 * Authors: Alex Deucher 25 */ 26 27 #include <linux/dma-buf.h> 28 29 #include <drm/drm_prime.h> 30 #include <drm/radeon_drm.h> 31 32 #include "radeon.h" 33 34 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 35 { 36 struct radeon_bo *bo = gem_to_radeon_bo(obj); 37 int npages = bo->tbo.num_pages; 38 39 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); 40 } 41 42 void *radeon_gem_prime_vmap(struct drm_gem_object *obj) 43 { 44 struct radeon_bo *bo = gem_to_radeon_bo(obj); 45 int ret; 46 47 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, 48 &bo->dma_buf_vmap); 49 if (ret) 50 return ERR_PTR(ret); 51 52 return bo->dma_buf_vmap.virtual; 53 } 54 55 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 56 { 57 struct radeon_bo *bo = gem_to_radeon_bo(obj); 58 59 ttm_bo_kunmap(&bo->dma_buf_vmap); 60 } 61 62 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 63 struct dma_buf_attachment *attach, 64 struct sg_table *sg) 65 { 66 struct dma_resv *resv = attach->dmabuf->resv; 67 struct radeon_device *rdev = dev->dev_private; 68 struct radeon_bo *bo; 69 int ret; 70 71 dma_resv_lock(resv, NULL); 72 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 73 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 74 dma_resv_unlock(resv); 75 if (ret) 76 return ERR_PTR(ret); 77 78 mutex_lock(&rdev->gem.mutex); 79 list_add_tail(&bo->list, &rdev->gem.objects); 80 mutex_unlock(&rdev->gem.mutex); 81 82 bo->prime_shared_count = 1; 83 return &bo->tbo.base; 84 } 85 86 int radeon_gem_prime_pin(struct drm_gem_object *obj) 87 { 88 struct radeon_bo *bo = gem_to_radeon_bo(obj); 89 int ret = 0; 90 91 ret = radeon_bo_reserve(bo, false); 92 if (unlikely(ret != 0)) 93 return ret; 94 95 /* pin buffer into GTT */ 96 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 97 if (likely(ret == 0)) 98 bo->prime_shared_count++; 99 100 radeon_bo_unreserve(bo); 101 return ret; 102 } 103 104 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 105 { 106 struct radeon_bo *bo = gem_to_radeon_bo(obj); 107 int ret = 0; 108 109 ret = radeon_bo_reserve(bo, false); 110 if (unlikely(ret != 0)) 111 return; 112 113 radeon_bo_unpin(bo); 114 if (bo->prime_shared_count) 115 bo->prime_shared_count--; 116 radeon_bo_unreserve(bo); 117 } 118 119 120 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, 121 int flags) 122 { 123 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 124 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) 125 return ERR_PTR(-EPERM); 126 return drm_gem_prime_export(gobj, flags); 127 } 128