1 /*- 2 * Copyright (c)2006 YAMAMOTO Takashi, 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 /* From $NetBSD: vmem.h,v 1.20 2013/01/29 21:26:24 para Exp $ */ 27 28 /* $FreeBSD$ */ 29 30 #ifndef _SYS_VMEM_H_ 31 #define _SYS_VMEM_H_ 32 33 #include <sys/types.h> 34 35 #ifdef _KERNEL 36 37 typedef struct vmem vmem_t; 38 39 typedef uintptr_t vmem_addr_t; 40 typedef size_t vmem_size_t; 41 42 #define VMEM_ADDR_MIN 0 43 #define VMEM_ADDR_MAX (~(vmem_addr_t)0) 44 45 typedef int (vmem_import_t)(void *, vmem_size_t, int, vmem_addr_t *); 46 typedef void (vmem_release_t)(void *, vmem_addr_t, vmem_size_t); 47 typedef void (vmem_reclaim_t)(vmem_t *, int); 48 49 /* 50 * Create a vmem: 51 * name - Name of the region 52 * base - Initial span start (optional) 53 * size - Initial span size 54 * quantum - Natural unit of allocation (ie PAGE_SIZE, 1, etc) 55 * qcache_max - Maximum size to quantum cache. This creates a UMA 56 * cache for each multiple of quantum up to qcache_max. 57 * flags - M_* flags 58 */ 59 vmem_t *vmem_create(const char *name, vmem_addr_t base, 60 vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags); 61 vmem_t *vmem_init(vmem_t *vm, const char *name, vmem_addr_t base, 62 vmem_size_t size, vmem_size_t quantum, vmem_size_t qcache_max, int flags); 63 void vmem_destroy(vmem_t *); 64 65 /* 66 * Set callbacks for bringing in dynamic regions: 67 * importfn - Backing store import routine. 68 * releasefn - Backing store release routine. 69 * arg - Backing store argument 70 * import_quantum - Size to import from backing store 71 */ 72 73 void vmem_set_import(vmem_t *vm, vmem_import_t *importfn, 74 vmem_release_t *releasefn, void *arg, vmem_size_t import_quantum); 75 76 /* 77 * Set a callback for reclaiming memory when space is exhausted: 78 */ 79 void vmem_set_reclaim(vmem_t *vm, vmem_reclaim_t *reclaimfn); 80 81 /* 82 * Allocate and free linear regions from a vmem. Must specify 83 * BESTFIT or FIRSTFIT. Free is non-blocking. These routines 84 * respect the quantum caches. 85 */ 86 int vmem_alloc(vmem_t *vm, vmem_size_t size, int flags, vmem_addr_t *addrp); 87 void vmem_free(vmem_t *vm, vmem_addr_t addr, vmem_size_t size); 88 89 /* 90 * Constrained allocate and free routines. These bypass the quantum cache. 91 * size - Size in units of 1, not quantum. 92 * align - Required alignment of the start of region 93 * phase - Offset from alignment 94 * nocross - Illegal boundary 95 * minaddr - Minimum allowed address for last byte 96 * maxaddr - Maximum allowed address for first byte 97 * flags - M_* flags 98 * addrp - result 99 */ 100 int vmem_xalloc(vmem_t *vm, vmem_size_t size, vmem_size_t align, 101 vmem_size_t phase, vmem_size_t nocross, vmem_addr_t minaddr, 102 vmem_addr_t maxaddr, int flags, vmem_addr_t *addrp); 103 void vmem_xfree(vmem_t *vm, vmem_addr_t addr, vmem_size_t size); 104 105 /* 106 * Add a static region to a vmem after create. This won't be freed 107 * until the vmem is destroyed. 108 */ 109 int vmem_add(vmem_t *vm, vmem_addr_t addr, vmem_size_t size, int flags); 110 111 /* 112 * Given roundup size to the vmem's native quantum size. 113 */ 114 vmem_size_t vmem_roundup_size(vmem_t *vm, vmem_size_t size); 115 116 /* 117 * Report vmem utilization according to the requested type. 118 */ 119 vmem_size_t vmem_size(vmem_t *vm, int typemask); 120 121 void vmem_whatis(vmem_addr_t addr, int (*fn)(const char *, ...) 122 __printflike(1, 2)); 123 void vmem_print(vmem_addr_t addr, const char *, int (*fn)(const char *, ...) 124 __printflike(1, 2)); 125 void vmem_printall(const char *, int (*fn)(const char *, ...) 126 __printflike(1, 2)); 127 void vmem_startup(void); 128 129 /* vmem_size typemask */ 130 #define VMEM_ALLOC 0x01 131 #define VMEM_FREE 0x02 132 133 #endif /* _KERNEL */ 134 135 #endif /* !_SYS_VMEM_H_ */ 136