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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _VM_PVN_H 41 #define _VM_PVN_H 42 43 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #include <sys/buf.h> 46 #include <vm/seg.h> 47 48 #ifdef __cplusplus 49 extern "C" { 50 #endif 51 52 #ifdef _KERNEL 53 54 /* 55 * VM - paged vnode. 56 * 57 * The VM system manages memory as a cache of paged vnodes. 58 * This file desribes the interfaces to common subroutines 59 * used to help implement the VM/file system routines. 60 */ 61 62 struct page *pvn_read_kluster(struct vnode *vp, u_offset_t off, 63 struct seg *seg, caddr_t addr, u_offset_t *offp, 64 size_t *lenp, u_offset_t vp_off, size_t vp_len, 65 int isra); 66 struct page *pvn_write_kluster(struct vnode *vp, struct page *pp, 67 u_offset_t *offp, size_t *lenp, u_offset_t vp_off, 68 size_t vp_len, int flags); 69 void pvn_read_done(struct page *plist, int flags); 70 void pvn_write_done(struct page *plist, int flags); 71 void pvn_io_done(struct page *plist); 72 int pvn_vplist_dirty(struct vnode *vp, u_offset_t off, 73 int (*putapage)(vnode_t *, struct page *, u_offset_t *, 74 size_t *, int, cred_t *), 75 int flags, struct cred *cred); 76 int pvn_getdirty(struct page *pp, int flags); 77 void pvn_vpzero(struct vnode *vp, u_offset_t vplen, size_t zbytes); 78 int pvn_getpages( 79 int (*getpage)(vnode_t *, u_offset_t, size_t, uint_t *, 80 struct page *[], size_t, struct seg *, 81 caddr_t, enum seg_rw, cred_t *), 82 struct vnode *vp, u_offset_t off, size_t len, 83 uint_t *protp, struct page **pl, size_t plsz, 84 struct seg *seg, caddr_t addr, enum seg_rw rw, 85 struct cred *cred); 86 void pvn_plist_init(struct page *pp, struct page **pl, size_t plsz, 87 u_offset_t off, size_t io_len, enum seg_rw rw); 88 void pvn_init(void); 89 90 /* 91 * When requesting pages from the getpage routines, pvn_getpages will 92 * allocate space to return PVN_GETPAGE_NUM pages which map PVN_GETPAGE_SZ 93 * worth of bytes. These numbers are chosen to be the minimum of the max's 94 * given in terms of bytes and pages. 95 */ 96 #define PVN_MAX_GETPAGE_SZ 0x10000 /* getpage size limit */ 97 #define PVN_MAX_GETPAGE_NUM 0x8 /* getpage page limit */ 98 99 #if PVN_MAX_GETPAGE_SZ > PVN_MAX_GETPAGE_NUM * PAGESIZE 100 101 #define PVN_GETPAGE_SZ ptob(PVN_MAX_GETPAGE_NUM) 102 #define PVN_GETPAGE_NUM PVN_MAX_GETPAGE_NUM 103 104 #else 105 106 #define PVN_GETPAGE_SZ PVN_MAX_GETPAGE_SZ 107 #define PVN_GETPAGE_NUM btop(PVN_MAX_GETPAGE_SZ) 108 109 #endif 110 111 #endif /* _KERNEL */ 112 113 #ifdef __cplusplus 114 } 115 #endif 116 117 #endif /* _VM_PVN_H */ 118