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
34 return drm_prime_pages_to_sg(obj->dev, nvbo->bo.ttm->pages,
35 nvbo->bo.ttm->num_pages);
36 }
37
nouveau_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)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 obj = ERR_PTR(ret);
75 goto unlock;
76 }
77
78 obj = &nvbo->bo.base;
79
80 unlock:
81 dma_resv_unlock(robj);
82 return obj;
83 }
84
nouveau_gem_prime_pin(struct drm_gem_object * obj)85 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
86 {
87 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
88 int ret;
89
90 /* pin buffer into GTT */
91 ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);
92 if (ret)
93 return -EINVAL;
94
95 return 0;
96 }
97
nouveau_gem_prime_unpin(struct drm_gem_object * obj)98 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
99 {
100 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
101
102 nouveau_bo_unpin(nvbo);
103 }
104