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 <drm/drmP.h> 26 #include <linux/dma-buf.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 int npages = nvbo->bo.num_pages; 35 36 return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages); 37 } 38 39 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj) 40 { 41 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 42 int ret; 43 44 ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages, 45 &nvbo->dma_buf_vmap); 46 if (ret) 47 return ERR_PTR(ret); 48 49 return nvbo->dma_buf_vmap.virtual; 50 } 51 52 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) 53 { 54 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 55 56 ttm_bo_kunmap(&nvbo->dma_buf_vmap); 57 } 58 59 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, 60 struct dma_buf_attachment *attach, 61 struct sg_table *sg) 62 { 63 struct nouveau_drm *drm = nouveau_drm(dev); 64 struct nouveau_bo *nvbo; 65 struct reservation_object *robj = attach->dmabuf->resv; 66 u32 flags = 0; 67 int ret; 68 69 flags = TTM_PL_FLAG_TT; 70 71 ww_mutex_lock(&robj->lock, NULL); 72 ret = nouveau_bo_new(&drm->client, attach->dmabuf->size, 0, flags, 0, 0, 73 sg, robj, &nvbo); 74 ww_mutex_unlock(&robj->lock); 75 if (ret) 76 return ERR_PTR(ret); 77 78 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART; 79 80 /* Initialize the embedded gem-object. We return a single gem-reference 81 * to the caller, instead of a normal nouveau_bo ttm reference. */ 82 ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size); 83 if (ret) { 84 nouveau_bo_ref(NULL, &nvbo); 85 return ERR_PTR(-ENOMEM); 86 } 87 88 return &nvbo->gem; 89 } 90 91 int nouveau_gem_prime_pin(struct drm_gem_object *obj) 92 { 93 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 94 int ret; 95 96 /* pin buffer into GTT */ 97 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false); 98 if (ret) 99 return -EINVAL; 100 101 return 0; 102 } 103 104 void nouveau_gem_prime_unpin(struct drm_gem_object *obj) 105 { 106 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 107 108 nouveau_bo_unpin(nvbo); 109 } 110 111 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *obj) 112 { 113 struct nouveau_bo *nvbo = nouveau_gem_object(obj); 114 115 return nvbo->bo.resv; 116 } 117