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
nouveau_gem_prime_get_sg_table(struct drm_gem_object * obj)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(obj->dev, nvbo->bo.ttm->pages, npages);
36 }
37
nouveau_gem_prime_vmap(struct drm_gem_object * obj)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
nouveau_gem_prime_vunmap(struct drm_gem_object * obj,void * vaddr)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
nouveau_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)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 int align = 0;
68 int ret;
69
70 dma_resv_lock(robj, NULL);
71 nvbo = nouveau_bo_alloc(&drm->client, &size, &align,
72 NOUVEAU_GEM_DOMAIN_GART, 0, 0);
73 if (IS_ERR(nvbo)) {
74 obj = ERR_CAST(nvbo);
75 goto unlock;
76 }
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->bo.base, size);
83 if (ret) {
84 nouveau_bo_ref(NULL, &nvbo);
85 obj = ERR_PTR(-ENOMEM);
86 goto unlock;
87 }
88
89 ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART,
90 sg, robj);
91 if (ret) {
92 nouveau_bo_ref(NULL, &nvbo);
93 obj = ERR_PTR(ret);
94 goto unlock;
95 }
96
97 obj = &nvbo->bo.base;
98
99 unlock:
100 dma_resv_unlock(robj);
101 return obj;
102 }
103
nouveau_gem_prime_pin(struct drm_gem_object * obj)104 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
105 {
106 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
107 int ret;
108
109 /* pin buffer into GTT */
110 ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);
111 if (ret)
112 return -EINVAL;
113
114 return 0;
115 }
116
nouveau_gem_prime_unpin(struct drm_gem_object * obj)117 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
118 {
119 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
120
121 nouveau_bo_unpin(nvbo);
122 }
123
