Do some fairly major include file cleanups to further separate kernelland
[dragonfly.git] / sys / sys / slaballoc.h
CommitLineData
a108bf71
MD
1/*
2 * KERN_SLABALLOC.H - Kernel SLAB memory allocator
3 *
4 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
05220613 28 * $DragonFly: src/sys/sys/slaballoc.h,v 1.5 2003/11/21 22:46:13 dillon Exp $
a108bf71
MD
29 */
30
31#ifndef _SYS_SLABALLOC_H_
32#define _SYS_SLABALLOC_H_
33
34#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
35
05220613
MD
36#ifndef _SYS_STDINT_H_
37#include <sys/stdint.h>
38#endif
a108bf71
MD
39#ifndef _SYS_MALLOC_H_
40#include <sys/malloc.h>
41#endif
42
43/*
44 * Note that any allocations which are exact multiples of PAGE_SIZE, or
45 * which are >= ZALLOC_ZONE_LIMIT, will fall through to the kmem subsystem.
46 */
47#define ZALLOC_ZONE_LIMIT (16 * 1024) /* max slab-managed alloc */
48#define ZALLOC_MIN_ZONE_SIZE (32 * 1024) /* minimum zone size */
49#define ZALLOC_MAX_ZONE_SIZE (128 * 1024) /* maximum zone size */
50#define ZALLOC_SLAB_MAGIC 0x736c6162 /* magic sanity */
46a3f46d 51#define ZALLOC_OVSZ_MAGIC 0x736c6163 /* magic sanity */
1c5ca4f3
MD
52#define ZALLOC_SLAB_SLIDE 20
53
a108bf71
MD
54
55#if ZALLOC_ZONE_LIMIT == 16384
56#define NZONES 72
57#elif ZALLOC_ZONE_LIMIT == 32768
58#define NZONES 80
59#else
60#error "I couldn't figure out NZONES"
61#endif
62
63/*
64 * Chunk structure for free elements
65 */
66typedef struct SLChunk {
67 struct SLChunk *c_Next;
68} SLChunk;
69
70/*
71 * The IN-BAND zone header is placed at the beginning of each zone.
72 */
73typedef struct SLZone {
05220613 74 __int32_t z_Magic; /* magic number for sanity check */
a108bf71
MD
75 int z_Cpu; /* which cpu owns this zone? */
76 int z_NFree; /* total free chunks / ualloc space in zone */
77 struct SLZone *z_Next; /* ZoneAry[] link if z_NFree non-zero */
78 int z_NMax; /* maximum free chunks */
1c5ca4f3
MD
79 char *z_BasePtr; /* pointer to start of chunk array */
80 int z_UIndex; /* current initial allocation index */
81 int z_UEndIndex; /* last (first) allocation index */
a108bf71
MD
82 int z_ChunkSize; /* chunk size for validation */
83 int z_FirstFreePg; /* chunk list on a page-by-page basis */
84 int z_ZoneIndex;
c7158d94 85 int z_Flags;
a108bf71
MD
86 SLChunk *z_PageAry[ZALLOC_MAX_ZONE_SIZE / PAGE_SIZE];
87} SLZone;
88
c7158d94
MD
89#define SLZF_UNOTZEROD 0x0001
90
a108bf71
MD
91typedef struct SLGlobalData {
92 SLZone *ZoneAry[NZONES]; /* linked list of zones NFree > 0 */
93 SLZone *FreeZones; /* whole zones that have become free */
46a3f46d 94 SLZone *FreeOvZones; /* oversized zones */
a108bf71 95 int NFreeZones; /* free zone count */
1c5ca4f3 96 int JunkIndex;
a108bf71
MD
97 struct malloc_type ZoneInfo; /* stats on meta-zones allocated */
98} SLGlobalData;
99
a108bf71
MD
100#endif /* _KERNEL */
101
05220613 102#endif /* _SYS_SLABALLOC_H_ */
a108bf71 103