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 void *radeon_gem_prime_vmap(struct drm_gem_object *obj); 34 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr); 35 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 36 struct dma_buf_attachment *attach, 37 struct sg_table *sg); 38 int radeon_gem_prime_pin(struct drm_gem_object *obj); 39 void radeon_gem_prime_unpin(struct drm_gem_object *obj); 40 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj); 41 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev, 42 struct drm_gem_object *gobj, 43 int flags); 44 45 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 46 { 47 struct radeon_bo *bo = gem_to_radeon_bo(obj); 48 int npages = bo->tbo.num_pages; 49 50 return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages); 51 } 52 53 void *radeon_gem_prime_vmap(struct drm_gem_object *obj) 54 { 55 struct radeon_bo *bo = gem_to_radeon_bo(obj); 56 int ret; 57 58 ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages, 59 &bo->dma_buf_vmap); 60 if (ret) 61 return ERR_PTR(ret); 62 63 return bo->dma_buf_vmap.virtual; 64 } 65 66 void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 67 { 68 struct radeon_bo *bo = gem_to_radeon_bo(obj); 69 70 ttm_bo_kunmap(&bo->dma_buf_vmap); 71 } 72 73 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 74 struct dma_buf_attachment *attach, 75 struct sg_table *sg) 76 { 77 struct reservation_object *resv = attach->dmabuf->resv; 78 struct radeon_device *rdev = dev->dev_private; 79 struct radeon_bo *bo; 80 int ret; 81 82 ww_mutex_lock(&resv->lock, NULL); 83 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 84 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 85 ww_mutex_unlock(&resv->lock); 86 if (ret) 87 return ERR_PTR(ret); 88 89 mutex_lock(&rdev->gem.mutex); 90 list_add_tail(&bo->list, &rdev->gem.objects); 91 mutex_unlock(&rdev->gem.mutex); 92 93 return &bo->gem_base; 94 } 95 96 int radeon_gem_prime_pin(struct drm_gem_object *obj) 97 { 98 struct radeon_bo *bo = gem_to_radeon_bo(obj); 99 int ret = 0; 100 101 ret = radeon_bo_reserve(bo, false); 102 if (unlikely(ret != 0)) 103 return ret; 104 105 /* pin buffer into GTT */ 106 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 107 radeon_bo_unreserve(bo); 108 return ret; 109 } 110 111 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 112 { 113 struct radeon_bo *bo = gem_to_radeon_bo(obj); 114 int ret = 0; 115 116 ret = radeon_bo_reserve(bo, false); 117 if (unlikely(ret != 0)) 118 return; 119 120 radeon_bo_unpin(bo); 121 radeon_bo_unreserve(bo); 122 } 123 124 125 struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj) 126 { 127 struct radeon_bo *bo = gem_to_radeon_bo(obj); 128 129 return bo->tbo.resv; 130 } 131 132 struct dma_buf *radeon_gem_prime_export(struct drm_device *dev, 133 struct drm_gem_object *gobj, 134 int flags) 135 { 136 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 137 if (radeon_ttm_tt_has_userptr(bo->tbo.ttm)) 138 return ERR_PTR(-EPERM); 139 return drm_gem_prime_export(dev, gobj, flags); 140 } 141