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
|
/*
* Copyright (c) 2011-2014, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GK20A_ALLOCATOR_H
#define GK20A_ALLOCATOR_H
#include <linux/rbtree.h>
#include <linux/rwsem.h>
#include <linux/slab.h>
/* #define ALLOCATOR_DEBUG */
/* main struct */
struct gk20a_allocator {
char name[32]; /* name for allocator */
struct rb_root rb_root; /* rb tree root for blocks */
u32 base; /* min value of this linear space */
u32 limit; /* max value = limit - 1 */
unsigned long *bitmap; /* bitmap */
struct gk20a_alloc_block *block_first; /* first block in list */
struct gk20a_alloc_block *block_recent; /* last visited block */
u32 first_free_addr; /* first free addr, non-contigous
allocation preferred start,
in order to pick up small holes */
u32 last_free_addr; /* last free addr, contiguous
allocation preferred start */
u32 cached_hole_size; /* max free hole size up to
last_free_addr */
u32 block_count; /* number of blocks */
struct rw_semaphore rw_sema; /* lock */
struct kmem_cache *block_cache; /* slab cache */
/* if enabled, constrain to [base, limit) */
struct {
bool enable;
u32 base;
u32 limit;
} constraint;
int (*alloc)(struct gk20a_allocator *allocator,
u32 *addr, u32 len, u32 align);
int (*free)(struct gk20a_allocator *allocator,
u32 addr, u32 len, u32 align);
};
int gk20a_allocator_init(struct gk20a_allocator *allocator,
const char *name, u32 base, u32 size);
void gk20a_allocator_destroy(struct gk20a_allocator *allocator);
int gk20a_allocator_block_alloc(struct gk20a_allocator *allocator,
u32 *addr, u32 len, u32 align);
int gk20a_allocator_block_free(struct gk20a_allocator *allocator,
u32 addr, u32 len, u32 align);
#if defined(ALLOCATOR_DEBUG)
#define allocator_dbg(alloctor, format, arg...) \
do { \
if (1) \
pr_debug("gk20a_allocator (%s) %s: " format "\n",\
alloctor->name, __func__, ##arg);\
} while (0)
#else /* ALLOCATOR_DEBUG */
#define allocator_dbg(format, arg...)
#endif /* ALLOCATOR_DEBUG */
#endif /* GK20A_ALLOCATOR_H */
|
