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 | |
27 | #include <linux/dma-buf.h> |
28 | |
29 | #include <drm/drm_prime.h> |
30 | #include <drm/radeon_drm.h> |
31 | |
32 | #include <drm/ttm/ttm_tt.h> |
33 | |
34 | #include "radeon.h" |
35 | #include "radeon_prime.h" |
36 | |
37 | struct sg_table *radeon_gem_prime_get_sg_table(struct drm_gem_object *obj) |
38 | { |
39 | struct radeon_bo *bo = gem_to_radeon_bo(obj); |
40 | |
41 | return drm_prime_pages_to_sg(dev: obj->dev, pages: bo->tbo.ttm->pages, |
42 | nr_pages: bo->tbo.ttm->num_pages); |
43 | } |
44 | |
45 | struct drm_gem_object *radeon_gem_prime_import_sg_table(struct drm_device *dev, |
46 | struct dma_buf_attachment *attach, |
47 | struct sg_table *sg) |
48 | { |
49 | struct dma_resv *resv = attach->dmabuf->resv; |
50 | struct radeon_device *rdev = dev->dev_private; |
51 | struct radeon_bo *bo; |
52 | int ret; |
53 | |
54 | dma_resv_lock(obj: resv, NULL); |
55 | ret = radeon_bo_create(rdev, size: attach->dmabuf->size, PAGE_SIZE, kernel: false, |
56 | RADEON_GEM_DOMAIN_GTT, flags: 0, sg, resv, bo_ptr: &bo); |
57 | dma_resv_unlock(obj: resv); |
58 | if (ret) |
59 | return ERR_PTR(error: ret); |
60 | |
61 | bo->tbo.base.funcs = &radeon_gem_object_funcs; |
62 | |
63 | mutex_lock(&rdev->gem.mutex); |
64 | list_add_tail(new: &bo->list, head: &rdev->gem.objects); |
65 | mutex_unlock(lock: &rdev->gem.mutex); |
66 | |
67 | bo->prime_shared_count = 1; |
68 | return &bo->tbo.base; |
69 | } |
70 | |
71 | int radeon_gem_prime_pin(struct drm_gem_object *obj) |
72 | { |
73 | struct radeon_bo *bo = gem_to_radeon_bo(obj); |
74 | int ret = 0; |
75 | |
76 | ret = radeon_bo_reserve(bo, no_intr: false); |
77 | if (unlikely(ret != 0)) |
78 | return ret; |
79 | |
80 | /* pin buffer into GTT */ |
81 | ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL); |
82 | if (likely(ret == 0)) |
83 | bo->prime_shared_count++; |
84 | |
85 | radeon_bo_unreserve(bo); |
86 | return ret; |
87 | } |
88 | |
89 | void radeon_gem_prime_unpin(struct drm_gem_object *obj) |
90 | { |
91 | struct radeon_bo *bo = gem_to_radeon_bo(obj); |
92 | int ret = 0; |
93 | |
94 | ret = radeon_bo_reserve(bo, no_intr: false); |
95 | if (unlikely(ret != 0)) |
96 | return; |
97 | |
98 | radeon_bo_unpin(bo); |
99 | if (bo->prime_shared_count) |
100 | bo->prime_shared_count--; |
101 | radeon_bo_unreserve(bo); |
102 | } |
103 | |
104 | |
105 | struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj, |
106 | int flags) |
107 | { |
108 | struct radeon_bo *bo = gem_to_radeon_bo(gobj); |
109 | if (radeon_ttm_tt_has_userptr(rdev: bo->rdev, ttm: bo->tbo.ttm)) |
110 | return ERR_PTR(error: -EPERM); |
111 | return drm_gem_prime_export(obj: gobj, flags); |
112 | } |
113 | |