1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #ifndef _VM_SEG_KMEM_H
27 #define _VM_SEG_KMEM_H
28
29
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33
34 #include <sys/types.h>
35 #include <sys/vnode.h>
36 #include <sys/vmem.h>
37 #include <vm/as.h>
38 #include <vm/seg.h>
39 #include <vm/page.h>
40
41 /*
42 * VM - Kernel Segment Driver
43 */
44
45 #if defined(_KERNEL)
46
47 extern char *kernelheap; /* start of primary kernel heap */
48 extern char *ekernelheap; /* end of primary kernel heap */
49 extern char *heap_lp_base; /* start of kernel large page heap arena */
50 extern char *heap_lp_end; /* end of kernel large page heap arena */
51 extern struct seg kvseg; /* primary kernel heap segment */
52 extern struct seg kvseg_core; /* "core" kernel heap segment */
53 extern struct seg kzioseg; /* Segment for zio mappings */
54 extern vmem_t *heap_lp_arena; /* kernel large page heap arena */
55 extern vmem_t *heap_arena; /* primary kernel heap arena */
56 extern vmem_t *hat_memload_arena; /* HAT translation arena */
57 extern struct seg kvseg32; /* 32-bit kernel heap segment */
58 extern vmem_t *heap32_arena; /* 32-bit kernel heap arena */
59 extern vmem_t *heaptext_arena; /* kernel text arena, from heap */
60 extern struct as kas; /* kernel address space */
61 extern int segkmem_reloc; /* enable/disable segkmem relocatable pages */
62 extern vmem_t *static_arena; /* arena for caches to import static memory */
63 extern vmem_t *static_alloc_arena; /* arena for allocating static memory */
64 extern vmem_t *zio_arena; /* arena for zio caches */
65 extern vmem_t *zio_alloc_arena; /* arena for zio caches */
66 extern struct vnode kvps[];
67 /*
68 * segkmem page vnodes
69 */
70 #define kvp (kvps[KV_KVP])
71 #define zvp (kvps[KV_ZVP])
72 #if defined(__sparc)
73 #define mpvp (kvps[KV_MPVP])
74 #define promvp (kvps[KV_PROMVP])
75 #endif /* __sparc */
76
77 extern int segkmem_create(struct seg *);
78 extern page_t *segkmem_page_create(void *, size_t, int, void *);
79 extern void *segkmem_xalloc(vmem_t *, void *, size_t, int, uint_t,
80 page_t *(*page_create_func)(void *, size_t, int, void *), void *);
81 extern void *segkmem_alloc(vmem_t *, size_t, int);
82 extern void *segkmem_alloc_permanent(vmem_t *, size_t, int);
83 extern void segkmem_free(vmem_t *, void *, size_t);
84 extern void segkmem_xfree(vmem_t *, void *, size_t, void (*)(page_t *));
85
86 extern void *boot_alloc(void *, size_t, uint_t);
87 extern void boot_mapin(caddr_t addr, size_t size);
88 extern void kernelheap_init(void *, void *, char *, void *, void *);
89 extern void segkmem_gc(void);
90
91 extern void *segkmem_zio_alloc(vmem_t *, size_t, int);
92 extern int segkmem_zio_create(struct seg *);
93 extern void segkmem_zio_free(vmem_t *, void *, size_t);
94 extern void segkmem_zio_init(void *, size_t);
95
96 /*
97 * Flags for segkmem_xalloc().
98 *
99 * SEGKMEM_SHARELOCKED requests pages which are locked SE_SHARED to be
100 * returned rather than unlocked which is now the default. Note that
101 * memory returned by SEGKMEM_SHARELOCKED cannot be freed by segkmem_free().
102 * This is a hack for seg_dev that should be cleaned up in the future.
103 */
104 #define SEGKMEM_SHARELOCKED 0x20000
105
106 /*
107 * Large page for kmem caches support
108 */
109 typedef struct segkmem_lpcb {
110 kmutex_t lp_lock;
111 kcondvar_t lp_cv;
112 uint_t lp_wait;
113 uint_t lp_uselp;
114 ulong_t lp_throttle;
115
116 /* stats */
117 uint64_t sleep_allocs_failed;
118 uint64_t nosleep_allocs_failed;
119 uint64_t allocs_throttled;
120 uint64_t allocs_limited;
121 uint64_t alloc_bytes_failed;
122 } segkmem_lpcb_t;
123
124 extern void *segkmem_alloc_lp(vmem_t *, size_t *, size_t, int);
125 extern void segkmem_free_lp(vmem_t *, void *, size_t);
126 extern int segkmem_lpsetup();
127 extern void segkmem_heap_lp_init(void);
128
129 extern size_t segkmem_lpsize;
130 extern int segkmem_lpszc;
131 extern size_t segkmem_heaplp_quantum;
132 extern size_t segkmem_kmemlp_max;
133
134 #define SEGKMEM_USE_LARGEPAGES (segkmem_lpsize > PAGESIZE)
135
136 #define IS_KMEM_VA_LARGEPAGE(vaddr) \
137 (((vaddr) >= heap_lp_base) && ((vaddr) < heap_lp_end))
138
139 #endif /* _KERNEL */
140
141 #ifdef __cplusplus
142 }
143 #endif
144
145 #endif /* _VM_SEG_KMEM_H */