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 <drm/drmP.h>
26 
27 #include "nouveau_drm.h"
28 #include "nouveau_gem.h"
29 
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 
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 
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 
58 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
59 							 size_t size,
60 							 struct sg_table *sg)
61 {
62 	struct nouveau_bo *nvbo;
63 	u32 flags = 0;
64 	int ret;
65 
66 	flags = TTM_PL_FLAG_TT;
67 
68 	ret = nouveau_bo_new(dev, size, 0, flags, 0, 0,
69 			     sg, &nvbo);
70 	if (ret)
71 		return ERR_PTR(ret);
72 
73 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
74 	nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
75 	if (!nvbo->gem) {
76 		nouveau_bo_ref(NULL, &nvbo);
77 		return ERR_PTR(-ENOMEM);
78 	}
79 
80 	nvbo->gem->driver_private = nvbo;
81 	return nvbo->gem;
82 }
83 
84 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
85 {
86 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
87 	int ret;
88 
89 	/* pin buffer into GTT */
90 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
91 	if (ret)
92 		return -EINVAL;
93 
94 	return 0;
95 }
96 
97 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
98 {
99 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
100 
101 	nouveau_bo_unpin(nvbo);
102 }
103