/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012 by Delphix. All rights reserved. */ #ifndef _SYS_VMEM_H #define _SYS_VMEM_H #include <sys/types.h> #ifdef __cplusplus extern "C" { #endif /* * Per-allocation flags */ #define VM_SLEEP 0x00000000 /* same as KM_SLEEP */ #define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */ #define VM_PANIC 0x00000002 /* same as KM_PANIC */ #define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */ #define VM_NORMALPRI 0x00000008 /* same as KM_NORMALPRI */ #define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */ #define VM_BESTFIT 0x00000100 #define VM_FIRSTFIT 0x00000200 #define VM_NEXTFIT 0x00000400 /* * The following flags are restricted for use only within the kernel. * VM_MEMLOAD is for use by the HAT to avoid infinite recursion. * VM_NORELOC is used by the kernel when static VA->PA mappings are required. */ #define VM_MEMLOAD 0x00000800 #define VM_NORELOC 0x00001000 /* * VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags * and forgo reaping if the allocation or attempted import, fails. This * flag is a segkmem-specific flag, and should not be used by anyone else. */ #define VM_ABORT 0x00002000 /* * VM_ENDALLOC requests that large addresses be preferred in allocations. * Has no effect if VM_NEXTFIT is active. */ #define VM_ENDALLOC 0x00004000 #define VM_FLAGS 0x0000FFFF /* * Arena creation flags */ #define VMC_POPULATOR 0x00010000 #define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */ #define VMC_IDENTIFIER 0x00040000 /* not backed by memory */ #define VMC_DUMPSAFE 0x00200000 /* can use alternate dump memory */ /* * internal use only; the import function uses the vmem_ximport_t interface * and may increase the request size if it so desires. * VMC_XALIGN, for use with vmem_xcreate, specifies that * the address returned by the import function will be * aligned according to the alignment argument. */ #define VMC_XALLOC 0x00080000 #define VMC_XALIGN 0x00100000 #define VMC_FLAGS 0xFFFF0000 /* * Public segment types */ #define VMEM_ALLOC 0x01 #define VMEM_FREE 0x02 /* * Implementation-private segment types */ #define VMEM_SPAN 0x10 #define VMEM_ROTOR 0x20 #define VMEM_WALKER 0x40 /* * VMEM_REENTRANT indicates to vmem_walk() that the callback routine may * call back into the arena being walked, so vmem_walk() must drop the * arena lock before each callback. The caveat is that since the arena * isn't locked, its state can change. Therefore it is up to the callback * routine to handle cases where the segment isn't of the expected type. * For example, we use this to walk heap_arena when generating a crash dump; * see segkmem_dump() for sample usage. */ #define VMEM_REENTRANT 0x80000000 typedef struct vmem vmem_t; typedef void *(vmem_alloc_t)(vmem_t *, size_t, int); typedef void (vmem_free_t)(vmem_t *, void *, size_t); /* * Alternate import style; the requested size is passed in a pointer, * which can be increased by the import function if desired. */ typedef void *(vmem_ximport_t)(vmem_t *, size_t *, size_t, int); #ifdef _KERNEL extern vmem_t *vmem_init(const char *, void *, size_t, size_t, vmem_alloc_t *, vmem_free_t *); extern void vmem_update(void *); extern int vmem_is_populator(); extern size_t vmem_seg_size; #endif extern vmem_t *vmem_create(const char *, void *, size_t, size_t, vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int); extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t, vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int); extern void vmem_destroy(vmem_t *); extern void *vmem_alloc(vmem_t *, size_t, int); extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t, void *, void *, int); extern void vmem_free(vmem_t *, void *, size_t); extern void vmem_xfree(vmem_t *, void *, size_t); extern void *vmem_add(vmem_t *, void *, size_t, int); extern int vmem_contains(vmem_t *, void *, size_t); extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *); extern size_t vmem_size(vmem_t *, int); extern void vmem_qcache_reap(vmem_t *vmp); #ifdef __cplusplus } #endif #endif /* _SYS_VMEM_H */
