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(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 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
nouveau_gem_prime_pin(struct drm_gem_object * obj)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
nouveau_gem_prime_unpin(struct drm_gem_object * obj)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