1 /* $NetBSD: nouveau_prime.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $ */
2
3 /*
4 * Copyright 2011 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Dave Airlie
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: nouveau_prime.c,v 1.3 2021/12/18 23:45:32 riastradh Exp $");
29
30 #include <linux/dma-buf.h>
31
32 #include "nouveau_drv.h"
33 #include "nouveau_gem.h"
34
nouveau_gem_prime_get_sg_table(struct drm_gem_object * obj)35 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
36 {
37 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
38 int npages = nvbo->bo.num_pages;
39
40 return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
41 }
42
nouveau_gem_prime_vmap(struct drm_gem_object * obj)43 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
44 {
45 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
46 int ret;
47
48 ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
49 &nvbo->dma_buf_vmap);
50 if (ret)
51 return ERR_PTR(ret);
52
53 return nvbo->dma_buf_vmap.virtual;
54 }
55
nouveau_gem_prime_vunmap(struct drm_gem_object * obj,void * vaddr)56 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
57 {
58 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
59
60 ttm_bo_kunmap(&nvbo->dma_buf_vmap);
61 }
62
nouveau_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)63 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
64 struct dma_buf_attachment *attach,
65 struct sg_table *sg)
66 {
67 struct nouveau_drm *drm = nouveau_drm(dev);
68 struct drm_gem_object *obj;
69 struct nouveau_bo *nvbo;
70 struct dma_resv *robj = attach->dmabuf->resv;
71 u64 size = attach->dmabuf->size;
72 u32 flags = 0;
73 int align = 0;
74 int ret;
75
76 flags = TTM_PL_FLAG_TT;
77
78 dma_resv_lock(robj, NULL);
79 nvbo = nouveau_bo_alloc(&drm->client, &size, &align, flags, 0, 0);
80 if (IS_ERR(nvbo)) {
81 obj = ERR_CAST(nvbo);
82 goto unlock;
83 }
84
85 nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
86
87 /* Initialize the embedded gem-object. We return a single gem-reference
88 * to the caller, instead of a normal nouveau_bo ttm reference. */
89 ret = drm_gem_object_init(dev, &nvbo->bo.base, size);
90 if (ret) {
91 nouveau_bo_ref(NULL, &nvbo);
92 obj = ERR_PTR(-ENOMEM);
93 goto unlock;
94 }
95
96 ret = nouveau_bo_init(nvbo, size, align, flags, sg, robj);
97 if (ret) {
98 nouveau_bo_ref(NULL, &nvbo);
99 obj = ERR_PTR(ret);
100 goto unlock;
101 }
102
103 obj = &nvbo->bo.base;
104
105 unlock:
106 dma_resv_unlock(robj);
107 return obj;
108 }
109
nouveau_gem_prime_pin(struct drm_gem_object * obj)110 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
111 {
112 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
113 int ret;
114
115 /* pin buffer into GTT */
116 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
117 if (ret)
118 return -EINVAL;
119
120 return 0;
121 }
122
nouveau_gem_prime_unpin(struct drm_gem_object * obj)123 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
124 {
125 struct nouveau_bo *nvbo = nouveau_gem_object(obj);
126
127 nouveau_bo_unpin(nvbo);
128 }
129