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 34 return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages, 35 nvbo->bo.ttm->num_pages); 36 } 37 38 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, 39 struct dma_buf_attachment *attach, 40 struct sg_table *sg) 41 { 42 struct nouveau_drm *drm = nouveau_drm(dev); 43 struct drm_gem_object *obj; 44 struct nouveau_bo *nvbo; 45 struct dma_resv *robj = attach->dmabuf->resv; 46 u64 size = attach->dmabuf->size; 47 int align = 0; 48 int ret; 49 50 dma_resv_lock(robj, NULL); 51 nvbo = nouveau_bo_alloc(&drm->client, &size, &align, 52 NOUVEAU_GEM_DOMAIN_GART, 0, 0); 53 if (IS_ERR(nvbo)) { 54 obj = ERR_CAST(nvbo); 55 goto unlock; 56 } 57 58 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART; 59 60 nvbo->bo.base.funcs = &nouveau_gem_object_funcs; 61 62 /* Initialize the embedded gem-object. We return a single gem-reference 63 * to the caller, instead of a normal nouveau_bo ttm reference. */ 64 ret = drm_gem_object_init(dev, &nvbo->bo.base, size); 65 if (ret) { 66 nouveau_bo_ref(NULL, &nvbo); 67 obj = ERR_PTR(-ENOMEM); 68 goto unlock; 69 } 70 71 ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART, 72 sg, robj); 73 if (ret) { 74 nouveau_bo_ref(NULL, &nvbo); 75 obj = ERR_PTR(ret); 76 goto unlock; 77 } 78 79 obj = &nvbo->bo.base; 80 81 unlock: 82 dma_resv_unlock(robj); 83 return obj; 84 } 85 86 int nouveau_gem_prime_pin(struct drm_gem_object *obj) 87 { 88 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 89 int ret; 90 91 /* pin buffer into GTT */ 92 ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false); 93 if (ret) 94 return -EINVAL; 95 96 ret = ttm_bo_reserve(&nvbo->bo, false, false, NULL); 97 if (ret) 98 goto error; 99 100 if (nvbo->bo.moving) 101 ret = dma_fence_wait(nvbo->bo.moving, true); 102 103 ttm_bo_unreserve(&nvbo->bo); 104 if (ret) 105 goto error; 106 107 return ret; 108 109 error: 110 nouveau_bo_unpin(nvbo); 111 return ret; 112 } 113 114 void nouveau_gem_prime_unpin(struct drm_gem_object *obj) 115 { 116 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 117 118 nouveau_bo_unpin(nvbo); 119 } 120