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 #ifdef notyet 35 36 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 37 { 38 struct radeon_bo *bo = gem_to_radeon_bo(obj); 39 int npages = bo->tbo.num_pages; 40 41 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); 42 } 43 44 void *radeon_gem_prime_vmap(struct drm_gem_object *obj) 45 { 46 struct radeon_bo *bo = gem_to_radeon_bo(obj); 47 int ret; 48 49 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, 50 &bo->dma_buf_vmap); 51 if (ret) 52 return ERR_PTR(ret); 53 54 return bo->dma_buf_vmap.virtual; 55 } 56 57 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 58 { 59 struct radeon_bo *bo = gem_to_radeon_bo(obj); 60 61 ttm_bo_kunmap(&bo->dma_buf_vmap); 62 } 63 64 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 65 struct dma_buf_attachment *attach, 66 struct sg_table *sg) 67 { 68 struct dma_resv *resv = attach->dmabuf->resv; 69 struct radeon_device *rdev = dev->dev_private; 70 struct radeon_bo *bo; 71 int ret; 72 73 dma_resv_lock(resv, NULL); 74 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 75 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 76 dma_resv_unlock(resv); 77 if (ret) 78 return ERR_PTR(ret); 79 80 mutex_lock(&rdev->gem.mutex); 81 list_add_tail(&bo->list, &rdev->gem.objects); 82 mutex_unlock(&rdev->gem.mutex); 83 84 bo->prime_shared_count = 1; 85 return &bo->tbo.base; 86 } 87 88 int radeon_gem_prime_pin(struct drm_gem_object *obj) 89 { 90 struct radeon_bo *bo = gem_to_radeon_bo(obj); 91 int ret = 0; 92 93 ret = radeon_bo_reserve(bo, false); 94 if (unlikely(ret != 0)) 95 return ret; 96 97 /* pin buffer into GTT */ 98 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 99 if (likely(ret == 0)) 100 bo->prime_shared_count++; 101 102 radeon_bo_unreserve(bo); 103 return ret; 104 } 105 106 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 107 { 108 struct radeon_bo *bo = gem_to_radeon_bo(obj); 109 int ret = 0; 110 111 ret = radeon_bo_reserve(bo, false); 112 if (unlikely(ret != 0)) 113 return; 114 115 radeon_bo_unpin(bo); 116 if (bo->prime_shared_count) 117 bo->prime_shared_count--; 118 radeon_bo_unreserve(bo); 119 } 120 121 #endif 122 123 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, 124 int flags) 125 { 126 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 127 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) 128 return ERR_PTR(-EPERM); 129 return drm_gem_prime_export(gobj, flags); 130 } 131