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1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
2 | /* | |
3 | * Copyright 2016-2021 Advanced Micro Devices, Inc. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: Christian König, Felix Kuehling | |
24 | */ | |
25 | ||
26 | #include "amdgpu.h" | |
27 | ||
b453e42a FK |
28 | /** |
29 | * DOC: mem_info_preempt_used | |
30 | * | |
31 | * The amdgpu driver provides a sysfs API for reporting current total amount of | |
32 | * used preemptible memory. | |
33 | * The file mem_info_preempt_used is used for this, and returns the current | |
34 | * used size of the preemptible block, in bytes | |
35 | */ | |
36 | static ssize_t mem_info_preempt_used_show(struct device *dev, | |
37 | struct device_attribute *attr, | |
38 | char *buf) | |
39 | { | |
40 | struct drm_device *ddev = dev_get_drvdata(dev); | |
41 | struct amdgpu_device *adev = drm_to_adev(ddev); | |
3fc2b087 | 42 | struct ttm_resource_manager *man = &adev->mman.preempt_mgr; |
b453e42a | 43 | |
3fc2b087 | 44 | return sysfs_emit(buf, "%llu\n", ttm_resource_manager_usage(man)); |
b453e42a FK |
45 | } |
46 | ||
47 | static DEVICE_ATTR_RO(mem_info_preempt_used); | |
48 | ||
49 | /** | |
50 | * amdgpu_preempt_mgr_new - allocate a new node | |
51 | * | |
52 | * @man: TTM memory type manager | |
53 | * @tbo: TTM BO we need this range for | |
54 | * @place: placement flags and restrictions | |
bbe04dec | 55 | * @res: TTM memory object |
b453e42a FK |
56 | * |
57 | * Dummy, just count the space used without allocating resources or any limit. | |
58 | */ | |
59 | static int amdgpu_preempt_mgr_new(struct ttm_resource_manager *man, | |
60 | struct ttm_buffer_object *tbo, | |
61 | const struct ttm_place *place, | |
09b020bb | 62 | struct ttm_resource **res) |
b453e42a | 63 | { |
09b020bb | 64 | *res = kzalloc(sizeof(**res), GFP_KERNEL); |
eed75ce7 | 65 | if (!*res) |
09b020bb | 66 | return -ENOMEM; |
b453e42a | 67 | |
09b020bb DA |
68 | ttm_resource_init(tbo, place, *res); |
69 | (*res)->start = AMDGPU_BO_INVALID_OFFSET; | |
b453e42a FK |
70 | return 0; |
71 | } | |
72 | ||
73 | /** | |
74 | * amdgpu_preempt_mgr_del - free ranges | |
75 | * | |
76 | * @man: TTM memory type manager | |
bbe04dec | 77 | * @res: TTM memory object |
b453e42a FK |
78 | * |
79 | * Free the allocated GTT again. | |
80 | */ | |
81 | static void amdgpu_preempt_mgr_del(struct ttm_resource_manager *man, | |
09b020bb | 82 | struct ttm_resource *res) |
b453e42a | 83 | { |
de3688e4 | 84 | ttm_resource_fini(man, res); |
09b020bb | 85 | kfree(res); |
b453e42a FK |
86 | } |
87 | ||
b453e42a FK |
88 | static const struct ttm_resource_manager_func amdgpu_preempt_mgr_func = { |
89 | .alloc = amdgpu_preempt_mgr_new, | |
90 | .free = amdgpu_preempt_mgr_del, | |
b453e42a FK |
91 | }; |
92 | ||
93 | /** | |
94 | * amdgpu_preempt_mgr_init - init PREEMPT manager and DRM MM | |
95 | * | |
96 | * @adev: amdgpu_device pointer | |
97 | * | |
98 | * Allocate and initialize the GTT manager. | |
99 | */ | |
100 | int amdgpu_preempt_mgr_init(struct amdgpu_device *adev) | |
101 | { | |
3fc2b087 | 102 | struct ttm_resource_manager *man = &adev->mman.preempt_mgr; |
b453e42a FK |
103 | int ret; |
104 | ||
105 | man->use_tt = true; | |
106 | man->func = &amdgpu_preempt_mgr_func; | |
107 | ||
3f268ef0 | 108 | ttm_resource_manager_init(man, &adev->mman.bdev, (1 << 30)); |
b453e42a | 109 | |
b453e42a FK |
110 | ret = device_create_file(adev->dev, &dev_attr_mem_info_preempt_used); |
111 | if (ret) { | |
112 | DRM_ERROR("Failed to create device file mem_info_preempt_used\n"); | |
113 | return ret; | |
114 | } | |
115 | ||
3fc2b087 | 116 | ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, man); |
b453e42a FK |
117 | ttm_resource_manager_set_used(man, true); |
118 | return 0; | |
119 | } | |
120 | ||
121 | /** | |
122 | * amdgpu_preempt_mgr_fini - free and destroy GTT manager | |
123 | * | |
124 | * @adev: amdgpu_device pointer | |
125 | * | |
126 | * Destroy and free the GTT manager, returns -EBUSY if ranges are still | |
127 | * allocated inside it. | |
128 | */ | |
129 | void amdgpu_preempt_mgr_fini(struct amdgpu_device *adev) | |
130 | { | |
3fc2b087 | 131 | struct ttm_resource_manager *man = &adev->mman.preempt_mgr; |
b453e42a FK |
132 | int ret; |
133 | ||
134 | ttm_resource_manager_set_used(man, false); | |
135 | ||
136 | ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man); | |
137 | if (ret) | |
138 | return; | |
139 | ||
140 | device_remove_file(adev->dev, &dev_attr_mem_info_preempt_used); | |
141 | ||
142 | ttm_resource_manager_cleanup(man); | |
143 | ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, NULL); | |
144 | } |