[go: nahoru, domu]
1/*
2 * Copyright 2012 Advanced Micro Devices, 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 * based on nouveau_prime.c
23 *
24 * Authors: Alex Deucher
25 */
26#include <drm/drmP.h>
27
28#include "radeon.h"
29#include <drm/radeon_drm.h>
30#include <linux/dma-buf.h>
31
32struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj)
33{
34	struct radeon_bo *bo = gem_to_radeon_bo(obj);
35	int npages = bo->tbo.num_pages;
36
37	return drm_prime_pages_to_sg(bo->tbo.ttm->pages, npages);
38}
39
40void *radeon_gem_prime_vmap(struct drm_gem_object *obj)
41{
42	struct radeon_bo *bo = gem_to_radeon_bo(obj);
43	int ret;
44
45	ret = ttm_bo_kmap(&bo->tbo, 0, bo->tbo.num_pages,
46			  &bo->dma_buf_vmap);
47	if (ret)
48		return ERR_PTR(ret);
49
50	return bo->dma_buf_vmap.virtual;
51}
52
53void radeon_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
54{
55	struct radeon_bo *bo = gem_to_radeon_bo(obj);
56
57	ttm_bo_kunmap(&bo->dma_buf_vmap);
58}
59
60struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev,
61							struct dma_buf_attachment *attach,
62							struct sg_table *sg)
63{
64	struct reservation_object *resv = attach->dmabuf->resv;
65	struct radeon_device *rdev = dev->dev_private;
66	struct radeon_bo *bo;
67	int ret;
68
69	ww_mutex_lock(&resv->lock, NULL);
70	ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
71			       RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
72	ww_mutex_unlock(&resv->lock);
73	if (ret)
74		return ERR_PTR(ret);
75
76	mutex_lock(&rdev->gem.mutex);
77	list_add_tail(&bo->list, &rdev->gem.objects);
78	mutex_unlock(&rdev->gem.mutex);
79
80	return &bo->gem_base;
81}
82
83int radeon_gem_prime_pin(struct drm_gem_object *obj)
84{
85	struct radeon_bo *bo = gem_to_radeon_bo(obj);
86	int ret = 0;
87
88	ret = radeon_bo_reserve(bo, false);
89	if (unlikely(ret != 0))
90		return ret;
91
92	/* pin buffer into GTT */
93	ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
94	radeon_bo_unreserve(bo);
95	return ret;
96}
97
98void radeon_gem_prime_unpin(struct drm_gem_object *obj)
99{
100	struct radeon_bo *bo = gem_to_radeon_bo(obj);
101	int ret = 0;
102
103	ret = radeon_bo_reserve(bo, false);
104	if (unlikely(ret != 0))
105		return;
106
107	radeon_bo_unpin(bo);
108	radeon_bo_unreserve(bo);
109}
110
111
112struct reservation_object *radeon_gem_prime_res_obj(struct drm_gem_object *obj)
113{
114	struct radeon_bo *bo = gem_to_radeon_bo(obj);
115
116	return bo->tbo.resv;
117}
118
119struct dma_buf *radeon_gem_prime_export(struct drm_device *dev,
120					struct drm_gem_object *gobj,
121					int flags)
122{
123	struct radeon_bo *bo = gem_to_radeon_bo(gobj);
124	if (radeon_ttm_tt_has_userptr(bo->tbo.ttm))
125		return ERR_PTR(-EPERM);
126	return drm_gem_prime_export(dev, gobj, flags);
127}
128