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 #include <drm/ttm/ttm_tt.h> 27 28 #include "nouveau_drv.h" 29 #include "nouveau_gem.h" 30 31 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj) 32 { 33 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 34 35 return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages, 36 nvbo->bo.ttm->num_pages); 37 } 38 39 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, 40 struct dma_buf_attachment *attach, 41 struct sg_table *sg) 42 { 43 struct nouveau_drm *drm = nouveau_drm(dev); 44 struct drm_gem_object *obj; 45 struct nouveau_bo *nvbo; 46 struct dma_resv *robj = attach->dmabuf->resv; 47 u64 size = attach->dmabuf->size; 48 int align = 0; 49 int ret; 50 51 dma_resv_lock(robj, NULL); 52 nvbo = nouveau_bo_alloc(&drm->client, &size, &align, 53 NOUVEAU_GEM_DOMAIN_GART, 0, 0, true); 54 if (IS_ERR(nvbo)) { 55 obj = ERR_CAST(nvbo); 56 goto unlock; 57 } 58 59 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART; 60 61 nvbo->bo.base.funcs = &nouveau_gem_object_funcs; 62 63 /* Initialize the embedded gem-object. We return a single gem-reference 64 * to the caller, instead of a normal nouveau_bo ttm reference. */ 65 ret = drm_gem_object_init(dev, &nvbo->bo.base, size); 66 if (ret) { 67 drm_gem_object_release(&nvbo->bo.base); 68 kfree(nvbo); 69 obj = ERR_PTR(-ENOMEM); 70 goto unlock; 71 } 72 73 ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART, 74 sg, robj); 75 if (ret) { 76 obj = ERR_PTR(ret); 77 goto unlock; 78 } 79 80 obj = &nvbo->bo.base; 81 82 unlock: 83 dma_resv_unlock(robj); 84 return obj; 85 } 86 87 int nouveau_gem_prime_pin(struct drm_gem_object *obj) 88 { 89 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 90 int ret; 91 92 /* pin buffer into GTT */ 93 ret = nouveau_bo_pin_locked(nvbo, NOUVEAU_GEM_DOMAIN_GART, false); 94 if (ret) 95 ret = -EINVAL; 96 97 return ret; 98 } 99 100 void nouveau_gem_prime_unpin(struct drm_gem_object *obj) 101 { 102 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 103 104 nouveau_bo_unpin_locked(nvbo); 105 } 106 107 struct dma_buf *nouveau_gem_prime_export(struct drm_gem_object *gobj, 108 int flags) 109 { 110 struct nouveau_bo *nvbo = nouveau_gem_object(gobj); 111 112 if (nvbo->no_share) 113 return ERR_PTR(-EPERM); 114 115 return drm_gem_prime_export(gobj, flags); 116 } 117