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 #include "radeon_prime.h" 34 35 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 36 { 37 struct radeon_bo *bo = gem_to_radeon_bo(obj); 38 39 return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages, 40 bo->tbo.ttm->num_pages); 41 } 42 43 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 44 struct dma_buf_attachment *attach, 45 struct sg_table *sg) 46 { 47 struct dma_resv *resv = attach->dmabuf->resv; 48 struct radeon_device *rdev = dev->dev_private; 49 struct radeon_bo *bo; 50 int ret; 51 52 dma_resv_lock(resv, NULL); 53 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 54 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 55 dma_resv_unlock(resv); 56 if (ret) 57 return ERR_PTR(ret); 58 59 bo->tbo.base.funcs = &radeon_gem_object_funcs; 60 61 mutex_lock(&rdev->gem.mutex); 62 list_add_tail(&bo->list, &rdev->gem.objects); 63 mutex_unlock(&rdev->gem.mutex); 64 65 bo->prime_shared_count = 1; 66 return &bo->tbo.base; 67 } 68 69 int radeon_gem_prime_pin(struct drm_gem_object *obj) 70 { 71 struct radeon_bo *bo = gem_to_radeon_bo(obj); 72 int ret = 0; 73 74 ret = radeon_bo_reserve(bo, false); 75 if (unlikely(ret != 0)) 76 return ret; 77 78 /* pin buffer into GTT */ 79 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 80 if (likely(ret == 0)) 81 bo->prime_shared_count++; 82 83 radeon_bo_unreserve(bo); 84 return ret; 85 } 86 87 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 88 { 89 struct radeon_bo *bo = gem_to_radeon_bo(obj); 90 int ret = 0; 91 92 ret = radeon_bo_reserve(bo, false); 93 if (unlikely(ret != 0)) 94 return; 95 96 radeon_bo_unpin(bo); 97 if (bo->prime_shared_count) 98 bo->prime_shared_count--; 99 radeon_bo_unreserve(bo); 100 } 101 102 103 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, 104 int flags) 105 { 106 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 107 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm)) 108 return ERR_PTR(-EPERM); 109 return drm_gem_prime_export(gobj, flags); 110 } 111