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
nouveau_gem_prime_get_sg_table(struct drm_gem_object * obj)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
nouveau_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)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
nouveau_gem_prime_pin(struct drm_gem_object * obj)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(nvbo, NOUVEAU_GEM_DOMAIN_GART, false);
94 if (ret)
95 return -EINVAL;
96
97 return 0;
98 }
99
nouveau_gem_prime_unpin(struct drm_gem_object * obj)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(nvbo);
105 }
106
nouveau_gem_prime_export(struct drm_gem_object * gobj,int flags)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