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 * Copyright 2016 Joyent, Inc.
25 * Copyright 2017 RackTop Systems.
26 */
27
28 #ifndef _VM_SEG_KMEM_H
29 #define _VM_SEG_KMEM_H
30
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 #include <sys/types.h>
37 #include <sys/vnode.h>
38 #include <sys/vmem.h>
39 #include <vm/as.h>
40 #include <vm/seg.h>
41 #include <vm/page.h>
42
43 /*
44 * VM - Kernel Segment Driver
45 */
46
47 #if defined(_KERNEL) || defined(_FAKE_KERNEL)
48
49 extern char *kernelheap; /* start of primary kernel heap */
50 extern char *ekernelheap; /* end of primary kernel heap */
51 extern char *heap_lp_base; /* start of kernel large page heap arena */
52 extern char *heap_lp_end; /* end of kernel large page heap arena */
53 extern struct seg kvseg; /* primary kernel heap segment */
54 extern struct seg kvseg_core; /* "core" kernel heap segment */
55 extern struct seg kzioseg; /* Segment for zio mappings */
56 extern vmem_t *heap_lp_arena; /* kernel large page heap arena */
57 extern vmem_t *heap_arena; /* primary kernel heap arena */
58 extern vmem_t *hat_memload_arena; /* HAT translation arena */
59 extern struct seg kvseg32; /* 32-bit kernel heap segment */
60 extern vmem_t *heap32_arena; /* 32-bit kernel heap arena */
61 extern vmem_t *heaptext_arena; /* kernel text arena, from heap */
62 extern struct as kas; /* kernel address space */
63 extern int segkmem_reloc; /* enable/disable segkmem relocatable pages */
64 extern vmem_t *static_arena; /* arena for caches to import static memory */
65 extern vmem_t *static_alloc_arena; /* arena for allocating static memory */
66 extern vmem_t *zio_arena; /* arena for zio caches */
67 extern vmem_t *zio_alloc_arena; /* arena for zio caches */
68 extern struct vnode kvps[];
69 /*
70 * segkmem page vnodes
71 */
72 #define kvp (kvps[KV_KVP])
73 #define zvp (kvps[KV_ZVP])
74 #if defined(__sparc)
75 #define mpvp (kvps[KV_MPVP])
76 #define promvp (kvps[KV_PROMVP])
77 #endif /* __sparc */
78
79 extern int segkmem_create(struct seg *);
80 extern page_t *segkmem_page_create(void *, size_t, int, void *);
81 extern void *segkmem_xalloc(vmem_t *, void *, size_t, int, uint_t,
82 page_t *(*page_create_func)(void *, size_t, int, void *), void *);
83 extern void *segkmem_alloc(vmem_t *, size_t, int);
84 extern void *segkmem_alloc_permanent(vmem_t *, size_t, int);
85 extern void segkmem_free(vmem_t *, void *, size_t);
86 extern void segkmem_xfree(vmem_t *, void *, size_t, void (*)(page_t *));
87
88 extern void *boot_alloc(void *, size_t, uint_t);
89 extern void boot_mapin(caddr_t addr, size_t size);
90 extern void kernelheap_init(void *, void *, char *, void *, void *);
91 extern void segkmem_gc(void);
92
93 extern void *segkmem_zio_alloc(vmem_t *, size_t, int);
94 extern int segkmem_zio_create(struct seg *);
95 extern void segkmem_zio_free(vmem_t *, void *, size_t);
96 extern void segkmem_zio_init(void *, size_t);
97
98 /*
99 * Flags for segkmem_xalloc().
100 *
101 * SEGKMEM_SHARELOCKED requests pages which are locked SE_SHARED to be
102 * returned rather than unlocked which is now the default. Note that
103 * memory returned by SEGKMEM_SHARELOCKED cannot be freed by segkmem_free().
104 * This is a hack for seg_dev that should be cleaned up in the future.
105 */
106 #define SEGKMEM_SHARELOCKED 0x20000
107
108 /*
109 * Large page for kmem caches support
110 */
111 typedef struct segkmem_lpcb {
112 kmutex_t lp_lock;
113 kcondvar_t lp_cv;
114 uint_t lp_wait;
115 uint_t lp_uselp;
116 ulong_t lp_throttle;
117
118 /* stats */
119 uint64_t sleep_allocs_failed;
120 uint64_t nosleep_allocs_failed;
121 uint64_t allocs_throttled;
122 uint64_t allocs_limited;
123 uint64_t alloc_bytes_failed;
124 } segkmem_lpcb_t;
125
126 extern void *segkmem_alloc_lp(vmem_t *, size_t *, size_t, int);
127 extern void segkmem_free_lp(vmem_t *, void *, size_t);
128 extern int segkmem_lpsetup();
129 extern void segkmem_heap_lp_init(void);
130
131 extern size_t segkmem_lpsize;
132 extern int segkmem_lpszc;
133 extern size_t segkmem_heaplp_quantum;
134 extern size_t segkmem_kmemlp_max;
135
136 #define SEGKMEM_USE_LARGEPAGES (segkmem_lpsize > PAGESIZE)
137
138 #define IS_KMEM_VA_LARGEPAGE(vaddr) \
139 (((vaddr) >= heap_lp_base) && ((vaddr) < heap_lp_end))
140
141 extern struct seg_ops segkmem_ops;
142
143 #endif /* _KERNEL || _FAKE_KERNEL */
144
145 #ifdef __cplusplus
146 }
147 #endif
148
149 #endif /* _VM_SEG_KMEM_H */