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 #include <drm/drmP.h> 27 28 #include "radeon.h" 29 #include <drm/radeon_drm.h> 30 #include <linux/dma-buf.h> 31 32 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 33 { 34 struct radeon_bo *bo = gem_to_radeon_bo(obj); 35 int npages = bo->tbo.num_pages; 36 37 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); 38 } 39 40 void *radeon_gem_prime_vmap(struct drm_gem_object *obj) 41 { 42 struct radeon_bo *bo = gem_to_radeon_bo(obj); 43 int ret; 44 45 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, 46 &bo->dma_buf_vmap); 47 if (ret) 48 return ERR_PTR(ret); 49 50 return bo->dma_buf_vmap.virtual; 51 } 52 53 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 54 { 55 struct radeon_bo *bo = gem_to_radeon_bo(obj); 56 57 ttm_bo_kunmap(&bo->dma_buf_vmap); 58 } 59 60 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 61 struct dma_buf_attachment *attach, 62 struct sg_table *sg) 63 { 64 struct reservation_object *resv = attach->dmabuf->resv; 65 struct radeon_device *rdev = dev->dev_private; 66 struct radeon_bo *bo; 67 int ret; 68 69 ww_mutex_lock(&resv->lock, NULL); 70 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 71 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 72 ww_mutex_unlock(&resv->lock); 73 if (ret) 74 return ERR_PTR(ret); 75 76 mutex_lock(&rdev->gem.mutex); 77 list_add_tail(&bo->list, &rdev->gem.objects); 78 mutex_unlock(&rdev->gem.mutex); 79 80 bo->prime_shared_count = 1; 81 return &bo->gem_base; 82 } 83 84 int radeon_gem_prime_pin(struct drm_gem_object *obj) 85 { 86 struct radeon_bo *bo = gem_to_radeon_bo(obj); 87 int ret = 0; 88 89 ret = radeon_bo_reserve(bo, false); 90 if (unlikely(ret != 0)) 91 return ret; 92 93 /* pin buffer into GTT */ 94 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 95 if (likely(ret == 0)) 96 bo->prime_shared_count++; 97 98 radeon_bo_unreserve(bo); 99 return ret; 100 } 101 102 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 103 { 104 struct radeon_bo *bo = gem_to_radeon_bo(obj); 105 int ret = 0; 106 107 ret = radeon_bo_reserve(bo, false); 108 if (unlikely(ret != 0)) 109 return; 110 111 radeon_bo_unpin(bo); 112 if (bo->prime_shared_count) 113 bo->prime_shared_count--; 114 radeon_bo_unreserve(bo); 115 } 116 117 118 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj) 119 { 120 struct radeon_bo *bo = gem_to_radeon_bo(obj); 121 122 return bo->tbo.resv; 123 } 124 125 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev, 126 struct drm_gem_object *gobj, 127 int flags) 128 { 129 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 130 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) 131 return ERR_PTR(-EPERM); 132 return drm_gem_prime_export(dev, gobj, flags); 133 } 134