1 | /* $NetBSD: vmem_impl.h,v 1.3 2013/11/22 21:04:11 christos Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c)2006 YAMAMOTO Takashi, |
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 | */ |
28 | |
29 | /* |
30 | * Data structures private to vmem. |
31 | */ |
32 | |
33 | #ifndef _SYS_VMEM_IMPL_H_ |
34 | #define _SYS_VMEM_IMPL_H_ |
35 | |
36 | #include <sys/types.h> |
37 | |
38 | #if defined(_KERNEL) |
39 | #define QCACHE |
40 | #include <sys/vmem.h> |
41 | |
42 | #define LOCK_DECL(name) \ |
43 | kmutex_t name; char lockpad[COHERENCY_UNIT - sizeof(kmutex_t)] |
44 | |
45 | #define CONDVAR_DECL(name) \ |
46 | kcondvar_t name |
47 | |
48 | #else /* defined(_KERNEL) */ |
49 | #include <stdio.h> |
50 | #include <errno.h> |
51 | #include <assert.h> |
52 | #include <stdlib.h> |
53 | #include <string.h> |
54 | |
55 | #include "vmem.h" |
56 | |
57 | #define LOCK_DECL(name) /* nothing */ |
58 | #define CONDVAR_DECL(name) /* nothing */ |
59 | #endif /* defined(_KERNEL) */ |
60 | |
61 | #define VMEM_MAXORDER (sizeof(vmem_size_t) * CHAR_BIT) |
62 | |
63 | typedef struct vmem_btag bt_t; |
64 | |
65 | TAILQ_HEAD(vmem_seglist, vmem_btag); |
66 | LIST_HEAD(vmem_freelist, vmem_btag); |
67 | LIST_HEAD(vmem_hashlist, vmem_btag); |
68 | |
69 | #if defined(QCACHE) |
70 | #define VMEM_QCACHE_IDX_MAX 16 |
71 | |
72 | #define QC_NAME_MAX 16 |
73 | |
74 | struct qcache { |
75 | pool_cache_t qc_cache; |
76 | vmem_t *qc_vmem; |
77 | char qc_name[QC_NAME_MAX]; |
78 | }; |
79 | typedef struct qcache qcache_t; |
80 | #define QC_POOL_TO_QCACHE(pool) ((qcache_t *)(pool->pr_qcache)) |
81 | #endif /* defined(QCACHE) */ |
82 | |
83 | #define VMEM_NAME_MAX 16 |
84 | |
85 | /* vmem arena */ |
86 | struct vmem { |
87 | CONDVAR_DECL(vm_cv); |
88 | LOCK_DECL(vm_lock); |
89 | vm_flag_t vm_flags; |
90 | vmem_import_t *vm_importfn; |
91 | vmem_release_t *vm_releasefn; |
92 | size_t vm_nfreetags; |
93 | LIST_HEAD(, vmem_btag) vm_freetags; |
94 | void *vm_arg; |
95 | struct vmem_seglist vm_seglist; |
96 | struct vmem_freelist vm_freelist[VMEM_MAXORDER]; |
97 | size_t vm_hashsize; |
98 | size_t vm_nbusytag; |
99 | struct vmem_hashlist *vm_hashlist; |
100 | struct vmem_hashlist vm_hash0; |
101 | size_t vm_quantum_mask; |
102 | int vm_quantum_shift; |
103 | size_t vm_size; |
104 | size_t vm_inuse; |
105 | char vm_name[VMEM_NAME_MAX+1]; |
106 | LIST_ENTRY(vmem) vm_alllist; |
107 | |
108 | #if defined(QCACHE) |
109 | /* quantum cache */ |
110 | size_t vm_qcache_max; |
111 | struct pool_allocator vm_qcache_allocator; |
112 | qcache_t vm_qcache_store[VMEM_QCACHE_IDX_MAX]; |
113 | qcache_t *vm_qcache[VMEM_QCACHE_IDX_MAX]; |
114 | #endif /* defined(QCACHE) */ |
115 | }; |
116 | |
117 | /* boundary tag */ |
118 | struct vmem_btag { |
119 | TAILQ_ENTRY(vmem_btag) bt_seglist; |
120 | union { |
121 | LIST_ENTRY(vmem_btag) u_freelist; /* BT_TYPE_FREE */ |
122 | LIST_ENTRY(vmem_btag) u_hashlist; /* BT_TYPE_BUSY */ |
123 | } bt_u; |
124 | #define bt_hashlist bt_u.u_hashlist |
125 | #define bt_freelist bt_u.u_freelist |
126 | vmem_addr_t bt_start; |
127 | vmem_size_t bt_size; |
128 | int bt_type; |
129 | }; |
130 | |
131 | #define BT_TYPE_SPAN 1 |
132 | #define BT_TYPE_SPAN_STATIC 2 |
133 | #define BT_TYPE_FREE 3 |
134 | #define BT_TYPE_BUSY 4 |
135 | #define BT_ISSPAN_P(bt) ((bt)->bt_type <= BT_TYPE_SPAN_STATIC) |
136 | |
137 | #define BT_END(bt) ((bt)->bt_start + (bt)->bt_size - 1) |
138 | |
139 | #endif /* !_SYS_VMEM_IMPL_H_ */ |
140 | |