1 /* 2 * Copyright 2011 Red Hat 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 * Authors: Dave Airlie 23 */ 24 25 #include <linux/dma-buf.h> 26 27 #include "nouveau_drv.h" 28 #include "nouveau_gem.h" 29 30 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj) 31 { 32 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 33 int npages = nvbo->bo.num_pages; 34 35 return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages); 36 } 37 38 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj) 39 { 40 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 41 int ret; 42 43 ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages, 44 &nvbo->dma_buf_vmap); 45 if (ret) 46 return ERR_PTR(ret); 47 48 return nvbo->dma_buf_vmap.virtual; 49 } 50 51 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 52 { 53 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 54 55 ttm_bo_kunmap(&nvbo->dma_buf_vmap); 56 } 57 58 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, 59 struct dma_buf_attachment *attach, 60 struct sg_table *sg) 61 { 62 struct nouveau_drm *drm = nouveau_drm(dev); 63 struct drm_gem_object *obj; 64 struct nouveau_bo *nvbo; 65 struct dma_resv *robj = attach->dmabuf->resv; 66 u64 size = attach->dmabuf->size; 67 u32 flags = 0; 68 int align = 0; 69 int ret; 70 71 flags = TTM_PL_FLAG_TT; 72 73 dma_resv_lock(robj, NULL); 74 nvbo = nouveau_bo_alloc(&drm->client, &size, &align, flags, 0, 0); 75 if (IS_ERR(nvbo)) { 76 obj = ERR_CAST(nvbo); 77 goto unlock; 78 } 79 80 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART; 81 82 /* Initialize the embedded gem-object. We return a single gem-reference 83 * to the caller, instead of a normal nouveau_bo ttm reference. */ 84 ret = drm_gem_object_init(dev, &nvbo->bo.base, size); 85 if (ret) { 86 nouveau_bo_ref(NULL, &nvbo); 87 obj = ERR_PTR(-ENOMEM); 88 goto unlock; 89 } 90 91 ret = nouveau_bo_init(nvbo, size, align, flags, sg, robj); 92 if (ret) { 93 nouveau_bo_ref(NULL, &nvbo); 94 obj = ERR_PTR(ret); 95 goto unlock; 96 } 97 98 obj = &nvbo->bo.base; 99 100 unlock: 101 dma_resv_unlock(robj); 102 return obj; 103 } 104 105 int nouveau_gem_prime_pin(struct drm_gem_object *obj) 106 { 107 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 108 int ret; 109 110 /* pin buffer into GTT */ 111 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false); 112 if (ret) 113 return -EINVAL; 114 115 return 0; 116 } 117 118 void nouveau_gem_prime_unpin(struct drm_gem_object *obj) 119 { 120 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 121 122 nouveau_bo_unpin(nvbo); 123 } 124