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#include <linux/dma-buf.h>
27
28#include "nouveau_drm.h"
29#include "nouveau_gem.h"
30
31struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
32{
33	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
34	int npages = nvbo->bo.num_pages;
35
36	return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
37}
38
39void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
40{
41	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
42	int ret;
43
44	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
45			  &nvbo->dma_buf_vmap);
46	if (ret)
47		return ERR_PTR(ret);
48
49	return nvbo->dma_buf_vmap.virtual;
50}
51
52void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
53{
54	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
55
56	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
57}
58
59struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
60							 struct dma_buf_attachment *attach,
61							 struct sg_table *sg)
62{
63	struct nouveau_bo *nvbo;
64	struct reservation_object *robj = attach->dmabuf->resv;
65	u32 flags = 0;
66	int ret;
67
68	flags = TTM_PL_FLAG_TT;
69
70	ww_mutex_lock(&robj->lock, NULL);
71	ret = nouveau_bo_new(dev, attach->dmabuf->size, 0, flags, 0, 0,
72			     sg, robj, &nvbo);
73	ww_mutex_unlock(&robj->lock);
74	if (ret)
75		return ERR_PTR(ret);
76
77	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
78
79	/* Initialize the embedded gem-object. We return a single gem-reference
80	 * to the caller, instead of a normal nouveau_bo ttm reference. */
81	ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
82	if (ret) {
83		nouveau_bo_ref(NULL, &nvbo);
84		return ERR_PTR(-ENOMEM);
85	}
86
87	return &nvbo->gem;
88}
89
90int nouveau_gem_prime_pin(struct drm_gem_object *obj)
91{
92	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
93	int ret;
94
95	/* pin buffer into GTT */
96	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT);
97	if (ret)
98		return -EINVAL;
99
100	return 0;
101}
102
103void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
104{
105	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
106
107	nouveau_bo_unpin(nvbo);
108}
109
110struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *obj)
111{
112	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
113
114	return nvbo->bo.resv;
115}
116