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
radeon_gem_prime_get_sg_table(struct drm_gem_object * obj)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(obj->dev, bo->tbo.ttm->pages,
42 bo->tbo.ttm->num_pages);
43 }
44
radeon_gem_prime_import_sg_table(struct drm_device * dev,struct dma_buf_attachment * attach,struct sg_table * sg)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(resv, NULL);
55 ret = radeon_bo_create(rdev, attach->dmabuf->size, PAGE_SIZE, false,
56 RADEON_GEM_DOMAIN_GTT, 0, sg, resv, &bo);
57 dma_resv_unlock(resv);
58 if (ret)
59 return ERR_PTR(ret);
60
61 bo->tbo.base.funcs = &radeon_gem_object_funcs;
62
63 mutex_lock(&rdev->gem.mutex);
64 list_add_tail(&bo->list, &rdev->gem.objects);
65 mutex_unlock(&rdev->gem.mutex);
66
67 bo->prime_shared_count = 1;
68 return &bo->tbo.base;
69 }
70
radeon_gem_prime_pin(struct drm_gem_object * obj)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 /* pin buffer into GTT */
77 ret = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_GTT, NULL);
78 if (likely(ret == 0))
79 bo->prime_shared_count++;
80
81 return ret;
82 }
83
radeon_gem_prime_unpin(struct drm_gem_object * obj)84 void radeon_gem_prime_unpin(struct drm_gem_object *obj)
85 {
86 struct radeon_bo *bo = gem_to_radeon_bo(obj);
87
88 radeon_bo_unpin(bo);
89 if (bo->prime_shared_count)
90 bo->prime_shared_count--;
91 }
92
93
radeon_gem_prime_export(struct drm_gem_object * gobj,int flags)94 struct dma_buf *radeon_gem_prime_export(struct drm_gem_object *gobj,
95 int flags)
96 {
97 struct radeon_bo *bo = gem_to_radeon_bo(gobj);
98 if (radeon_ttm_tt_has_userptr(bo->rdev, bo->tbo.ttm))
99 return ERR_PTR(-EPERM);
100 return drm_gem_prime_export(gobj, flags);
101 }
102