xref: /illumos-gate/usr/src/uts/common/vm/seg_kmem.h (revision 04909c8c)
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 2018 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 
69 #if defined(__amd64)
70 extern struct seg kvmmseg;	/* Segment for vmm mappings */
71 extern vmem_t *kvmm_arena;	/* arena for vmm VA */
72 extern void segkmem_kvmm_init(void *, size_t);
73 #endif
74 
75 extern struct vnode kvps[];
76 /*
77  * segkmem page vnodes (please don't add more defines here...)
78  */
79 #define	kvp		(kvps[KV_KVP])
80 #if defined(__sparc)
81 #define	mpvp		(kvps[KV_MPVP])
82 #define	promvp		(kvps[KV_PROMVP])
83 #endif	/* __sparc */
84 
85 extern int segkmem_create(struct seg *);
86 extern page_t *segkmem_page_create(void *, size_t, int, void *);
87 extern void *segkmem_xalloc(vmem_t *, void *, size_t, int, uint_t,
88 	page_t *(*page_create_func)(void *, size_t, int, void *), void *);
89 extern void *segkmem_alloc(vmem_t *, size_t, int);
90 extern void *segkmem_alloc_permanent(vmem_t *, size_t, int);
91 extern void segkmem_free(vmem_t *, void *, size_t);
92 extern void segkmem_xfree(vmem_t *, void *, size_t,
93     struct vnode *, void (*)(page_t *));
94 
95 extern void *boot_alloc(void *, size_t, uint_t);
96 extern void boot_mapin(caddr_t addr, size_t size);
97 extern void kernelheap_init(void *, void *, char *, void *, void *);
98 extern void segkmem_gc(void);
99 
100 extern void segkmem_zio_init(void *, size_t);
101 
102 /*
103  * Flags for segkmem_xalloc().
104  *
105  * SEGKMEM_SHARELOCKED requests pages which are locked SE_SHARED to be
106  * returned rather than unlocked which is now the default.  Note that
107  * memory returned by SEGKMEM_SHARELOCKED cannot be freed by segkmem_free().
108  * This is a hack for seg_dev that should be cleaned up in the future.
109  */
110 #define	SEGKMEM_SHARELOCKED	0x20000
111 
112 /*
113  * Large page for kmem caches support
114  */
115 typedef struct segkmem_lpcb {
116 	kmutex_t	lp_lock;
117 	kcondvar_t	lp_cv;
118 	uint_t		lp_wait;
119 	uint_t		lp_uselp;
120 	ulong_t		lp_throttle;
121 
122 	/* stats */
123 	uint64_t	sleep_allocs_failed;
124 	uint64_t	nosleep_allocs_failed;
125 	uint64_t	allocs_throttled;
126 	uint64_t	allocs_limited;
127 	uint64_t	alloc_bytes_failed;
128 } segkmem_lpcb_t;
129 
130 extern void	*segkmem_alloc_lp(vmem_t *, size_t *, size_t, int);
131 extern void	segkmem_free_lp(vmem_t *, void *, size_t);
132 extern int	segkmem_lpsetup();
133 extern void	segkmem_heap_lp_init(void);
134 
135 extern size_t	segkmem_lpsize;
136 extern int	segkmem_lpszc;
137 extern size_t	segkmem_heaplp_quantum;
138 extern size_t	segkmem_kmemlp_max;
139 
140 #define	SEGKMEM_USE_LARGEPAGES (segkmem_lpsize > PAGESIZE)
141 
142 #define	IS_KMEM_VA_LARGEPAGE(vaddr)				        \
143 	(((vaddr) >= heap_lp_base) && ((vaddr) < heap_lp_end))
144 
145 extern struct seg_ops segkmem_ops;
146 
147 #endif	/* _KERNEL || _FAKE_KERNEL */
148 
149 #ifdef	__cplusplus
150 }
151 #endif
152 
153 #endif	/* _VM_SEG_KMEM_H */
154