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
197
198
199
200
201
202
203
204
205
206
207
208
|
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/**************************************************************************
*
* Copyright (c) 2007-2010 VMware, Inc., Palo Alto, CA., USA
* All Rights Reserved.
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS 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: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
*/
#include <drm/ttm/ttm_device.h>
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_range_manager.h>
#include <drm/ttm/ttm_bo_api.h>
#include <drm/drm_mm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
/*
* Currently we use a spinlock for the lock, but a mutex *may* be
* more appropriate to reduce scheduling latency if the range manager
* ends up with very fragmented allocation patterns.
*/
struct ttm_range_manager {
struct ttm_resource_manager manager;
struct drm_mm mm;
spinlock_t lock;
};
static inline struct ttm_range_manager *
to_range_manager(struct ttm_resource_manager *man)
{
return container_of(man, struct ttm_range_manager, manager);
}
static int ttm_range_man_alloc(struct ttm_resource_manager *man,
struct ttm_buffer_object *bo,
const struct ttm_place *place,
struct ttm_resource **res)
{
struct ttm_range_manager *rman = to_range_manager(man);
struct ttm_range_mgr_node *node;
struct drm_mm *mm = &rman->mm;
enum drm_mm_insert_mode mode;
unsigned long lpfn;
int ret;
lpfn = place->lpfn;
if (!lpfn)
lpfn = man->size;
node = kzalloc(struct_size(node, mm_nodes, 1), GFP_KERNEL);
if (!node)
return -ENOMEM;
mode = DRM_MM_INSERT_BEST;
if (place->flags & TTM_PL_FLAG_TOPDOWN)
mode = DRM_MM_INSERT_HIGH;
ttm_resource_init(bo, place, &node->base);
spin_lock(&rman->lock);
ret = drm_mm_insert_node_in_range(mm, &node->mm_nodes[0],
node->base.num_pages,
bo->page_alignment, 0,
place->fpfn, lpfn, mode);
spin_unlock(&rman->lock);
if (unlikely(ret)) {
ttm_resource_fini(man, *res);
kfree(node);
return ret;
}
node->base.start = node->mm_nodes[0].start;
*res = &node->base;
return 0;
}
static void ttm_range_man_free(struct ttm_resource_manager *man,
struct ttm_resource *res)
{
struct ttm_range_mgr_node *node = to_ttm_range_mgr_node(res);
struct ttm_range_manager *rman = to_range_manager(man);
spin_lock(&rman->lock);
drm_mm_remove_node(&node->mm_nodes[0]);
spin_unlock(&rman->lock);
ttm_resource_fini(man, res);
kfree(node);
}
static void ttm_range_man_debug(struct ttm_resource_manager *man,
struct drm_printer *printer)
{
struct ttm_range_manager *rman = to_range_manager(man);
spin_lock(&rman->lock);
drm_mm_print(&rman->mm, printer);
spin_unlock(&rman->lock);
}
static const struct ttm_resource_manager_func ttm_range_manager_func = {
.alloc = ttm_range_man_alloc,
.free = ttm_range_man_free,
.debug = ttm_range_man_debug
};
/**
* ttm_range_man_init_nocheck - Initialise a generic range manager for the
* selected memory type.
*
* @bdev: ttm device
* @type: memory manager type
* @use_tt: if the memory manager uses tt
* @p_size: size of area to be managed in pages.
*
* The range manager is installed for this device in the type slot.
*
* Return: %0 on success or a negative error code on failure
*/
int ttm_range_man_init_nocheck(struct ttm_device *bdev,
unsigned type, bool use_tt,
unsigned long p_size)
{
struct ttm_resource_manager *man;
struct ttm_range_manager *rman;
rman = kzalloc(sizeof(*rman), GFP_KERNEL);
if (!rman)
return -ENOMEM;
man = &rman->manager;
man->use_tt = use_tt;
man->func = &ttm_range_manager_func;
ttm_resource_manager_init(man, bdev, p_size);
drm_mm_init(&rman->mm, 0, p_size);
spin_lock_init(&rman->lock);
ttm_set_driver_manager(bdev, type, &rman->manager);
ttm_resource_manager_set_used(man, true);
return 0;
}
EXPORT_SYMBOL(ttm_range_man_init_nocheck);
/**
* ttm_range_man_fini_nocheck - Remove the generic range manager from a slot
* and tear it down.
*
* @bdev: ttm device
* @type: memory manager type
*
* Return: %0 on success or a negative error code on failure
*/
int ttm_range_man_fini_nocheck(struct ttm_device *bdev,
unsigned type)
{
struct ttm_resource_manager *man = ttm_manager_type(bdev, type);
struct ttm_range_manager *rman = to_range_manager(man);
struct drm_mm *mm = &rman->mm;
int ret;
if (!man)
return 0;
ttm_resource_manager_set_used(man, false);
ret = ttm_resource_manager_evict_all(bdev, man);
if (ret)
return ret;
spin_lock(&rman->lock);
drm_mm_clean(mm);
drm_mm_takedown(mm);
spin_unlock(&rman->lock);
ttm_resource_manager_cleanup(man);
ttm_set_driver_manager(bdev, type, NULL);
kfree(rman);
return 0;
}
EXPORT_SYMBOL(ttm_range_man_fini_nocheck);
|
