1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
* Copyright 2016-2021 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Christian König, Felix Kuehling
*/
#include "amdgpu.h"
static inline struct amdgpu_preempt_mgr *
to_preempt_mgr(struct ttm_resource_manager *man)
{
return container_of(man, struct amdgpu_preempt_mgr, manager);
}
/**
* DOC: mem_info_preempt_used
*
* The amdgpu driver provides a sysfs API for reporting current total amount of
* used preemptible memory.
* The file mem_info_preempt_used is used for this, and returns the current
* used size of the preemptible block, in bytes
*/
static ssize_t mem_info_preempt_used_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
struct ttm_resource_manager *man;
man = ttm_manager_type(&adev->mman.bdev, AMDGPU_PL_PREEMPT);
return sysfs_emit(buf, "%llu\n", amdgpu_preempt_mgr_usage(man));
}
static DEVICE_ATTR_RO(mem_info_preempt_used);
/**
* amdgpu_preempt_mgr_new - allocate a new node
*
* @man: TTM memory type manager
* @tbo: TTM BO we need this range for
* @place: placement flags and restrictions
* @res: TTM memory object
*
* Dummy, just count the space used without allocating resources or any limit.
*/
static int amdgpu_preempt_mgr_new(struct ttm_resource_manager *man,
struct ttm_buffer_object *tbo,
const struct ttm_place *place,
struct ttm_resource **res)
{
struct amdgpu_preempt_mgr *mgr = to_preempt_mgr(man);
*res = kzalloc(sizeof(**res), GFP_KERNEL);
if (!*res)
return -ENOMEM;
ttm_resource_init(tbo, place, *res);
(*res)->start = AMDGPU_BO_INVALID_OFFSET;
atomic64_add((*res)->num_pages, &mgr->used);
return 0;
}
/**
* amdgpu_preempt_mgr_del - free ranges
*
* @man: TTM memory type manager
* @res: TTM memory object
*
* Free the allocated GTT again.
*/
static void amdgpu_preempt_mgr_del(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
struct amdgpu_preempt_mgr *mgr = to_preempt_mgr(man);
atomic64_sub(res->num_pages, &mgr->used);
ttm_resource_fini(man, res);
kfree(res);
}
/**
* amdgpu_preempt_mgr_usage - return usage of PREEMPT domain
*
* @man: TTM memory type manager
*
* Return how many bytes are used in the GTT domain
*/
uint64_t amdgpu_preempt_mgr_usage(struct ttm_resource_manager *man)
{
struct amdgpu_preempt_mgr *mgr = to_preempt_mgr(man);
s64 result = atomic64_read(&mgr->used);
return (result > 0 ? result : 0) * PAGE_SIZE;
}
/**
* amdgpu_preempt_mgr_debug - dump VRAM table
*
* @man: TTM memory type manager
* @printer: DRM printer to use
*
* Dump the table content using printk.
*/
static void amdgpu_preempt_mgr_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
struct amdgpu_preempt_mgr *mgr = to_preempt_mgr(man);
drm_printf(printer, "man size:%llu pages, preempt used:%lld pages\n",
man->size, (u64)atomic64_read(&mgr->used));
}
static const struct ttm_resource_manager_func amdgpu_preempt_mgr_func = {
.alloc = amdgpu_preempt_mgr_new,
.free = amdgpu_preempt_mgr_del,
.debug = amdgpu_preempt_mgr_debug
};
/**
* amdgpu_preempt_mgr_init - init PREEMPT manager and DRM MM
*
* @adev: amdgpu_device pointer
*
* Allocate and initialize the GTT manager.
*/
int amdgpu_preempt_mgr_init(struct amdgpu_device *adev)
{
struct amdgpu_preempt_mgr *mgr = &adev->mman.preempt_mgr;
struct ttm_resource_manager *man = &mgr->manager;
int ret;
man->use_tt = true;
man->func = &amdgpu_preempt_mgr_func;
ttm_resource_manager_init(man, &adev->mman.bdev, (1 << 30));
atomic64_set(&mgr->used, 0);
ret = device_create_file(adev->dev, &dev_attr_mem_info_preempt_used);
if (ret) {
DRM_ERROR("Failed to create device file mem_info_preempt_used\n");
return ret;
}
ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT,
&mgr->manager);
ttm_resource_manager_set_used(man, true);
return 0;
}
/**
* amdgpu_preempt_mgr_fini - free and destroy GTT manager
*
* @adev: amdgpu_device pointer
*
* Destroy and free the GTT manager, returns -EBUSY if ranges are still
* allocated inside it.
*/
void amdgpu_preempt_mgr_fini(struct amdgpu_device *adev)
{
struct amdgpu_preempt_mgr *mgr = &adev->mman.preempt_mgr;
struct ttm_resource_manager *man = &mgr->manager;
int ret;
ttm_resource_manager_set_used(man, false);
ret = ttm_resource_manager_evict_all(&adev->mman.bdev, man);
if (ret)
return;
device_remove_file(adev->dev, &dev_attr_mem_info_preempt_used);
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(&adev->mman.bdev, AMDGPU_PL_PREEMPT, NULL);
}
|
