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 <drm/ttm/ttm_tt.h> 33 34 #include "radeon.h" 35 #include "radeon_prime.h" 36 37 struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) 38 { 39 struct radeon_bo *bo = gem_to_radeon_bo(obj); 40 41 return drm_prime_pages_to_sg(obj->dev, bo->tbo.ttm->pages, 42 bo->tbo.ttm->num_pages); 43 } 44 45 struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, 46 struct dma_buf_attachment *attach, 47 struct sg_table *sg) 48 { 49 struct dma_resv *resv = attach->dmabuf->resv; 50 struct radeon_device *rdev = dev->dev_private; 51 struct radeon_bo *bo; 52 int ret; 53 54 dma_resv_lock(resv, NULL); 55 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false, 56 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo); 57 dma_resv_unlock(resv); 58 if (ret) 59 return ERR_PTR(ret); 60 61 bo->tbo.base.funcs = &radeon_gem_object_funcs; 62 63 mutex_lock(&rdev->gem.mutex); 64 list_add_tail(&bo->list, &rdev->gem.objects); 65 mutex_unlock(&rdev->gem.mutex); 66 67 bo->prime_shared_count = 1; 68 return &bo->tbo.base; 69 } 70 71 int radeon_gem_prime_pin(struct drm_gem_object *obj) 72 { 73 struct radeon_bo *bo = gem_to_radeon_bo(obj); 74 int ret = 0; 75 76 /* pin buffer into GTT */ 77 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); 78 if (likely(ret == 0)) 79 bo->prime_shared_count++; 80 81 return ret; 82 } 83 84 void radeon_gem_prime_unpin(struct drm_gem_object *obj) 85 { 86 struct radeon_bo *bo = gem_to_radeon_bo(obj); 87 88 radeon_bo_unpin(bo); 89 if (bo->prime_shared_count) 90 bo->prime_shared_count--; 91 } 92 93 94 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, 95 int flags) 96 { 97 struct radeon_bo *bo = gem_to_radeon_bo(gobj); 98 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm)) 99 return ERR_PTR(-EPERM); 100 return drm_gem_prime_export(gobj, flags); 101 } 102