17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5aaa10e67Sha137994 * Common Development and Distribution License (the "License"). 6aaa10e67Sha137994 * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 2223a80de1SStan Studzinski * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. 23*94dd93aeSGeorge Wilson * Copyright (c) 2012 by Delphix. All rights reserved. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate #ifndef _SYS_VMEM_H 277c478bd9Sstevel@tonic-gate #define _SYS_VMEM_H 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate #ifdef __cplusplus 327c478bd9Sstevel@tonic-gate extern "C" { 337c478bd9Sstevel@tonic-gate #endif 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate /* 377c478bd9Sstevel@tonic-gate * Per-allocation flags 387c478bd9Sstevel@tonic-gate */ 397c478bd9Sstevel@tonic-gate #define VM_SLEEP 0x00000000 /* same as KM_SLEEP */ 407c478bd9Sstevel@tonic-gate #define VM_NOSLEEP 0x00000001 /* same as KM_NOSLEEP */ 417c478bd9Sstevel@tonic-gate #define VM_PANIC 0x00000002 /* same as KM_PANIC */ 427c478bd9Sstevel@tonic-gate #define VM_PUSHPAGE 0x00000004 /* same as KM_PUSHPAGE */ 4323a80de1SStan Studzinski #define VM_NORMALPRI 0x00000008 /* same as KM_NORMALPRI */ 447c478bd9Sstevel@tonic-gate #define VM_KMFLAGS 0x000000ff /* flags that must match KM_* flags */ 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate #define VM_BESTFIT 0x00000100 477c478bd9Sstevel@tonic-gate #define VM_FIRSTFIT 0x00000200 487c478bd9Sstevel@tonic-gate #define VM_NEXTFIT 0x00000400 497c478bd9Sstevel@tonic-gate 507c478bd9Sstevel@tonic-gate /* 517c478bd9Sstevel@tonic-gate * The following flags are restricted for use only within the kernel. 527c478bd9Sstevel@tonic-gate * VM_MEMLOAD is for use by the HAT to avoid infinite recursion. 537c478bd9Sstevel@tonic-gate * VM_NORELOC is used by the kernel when static VA->PA mappings are required. 547c478bd9Sstevel@tonic-gate */ 557c478bd9Sstevel@tonic-gate #define VM_MEMLOAD 0x00000800 567c478bd9Sstevel@tonic-gate #define VM_NORELOC 0x00001000 577c478bd9Sstevel@tonic-gate /* 587c478bd9Sstevel@tonic-gate * VM_ABORT requests that vmem_alloc() *ignore* the VM_SLEEP/VM_NOSLEEP flags 597c478bd9Sstevel@tonic-gate * and forgo reaping if the allocation or attempted import, fails. This 607c478bd9Sstevel@tonic-gate * flag is a segkmem-specific flag, and should not be used by anyone else. 617c478bd9Sstevel@tonic-gate */ 627c478bd9Sstevel@tonic-gate #define VM_ABORT 0x00002000 637c478bd9Sstevel@tonic-gate 640616c1c3SMichael Corcoran /* 650616c1c3SMichael Corcoran * VM_ENDALLOC requests that large addresses be preferred in allocations. 660616c1c3SMichael Corcoran * Has no effect if VM_NEXTFIT is active. 670616c1c3SMichael Corcoran */ 680616c1c3SMichael Corcoran #define VM_ENDALLOC 0x00004000 690616c1c3SMichael Corcoran 707c478bd9Sstevel@tonic-gate #define VM_FLAGS 0x0000FFFF 717c478bd9Sstevel@tonic-gate 727c478bd9Sstevel@tonic-gate /* 737c478bd9Sstevel@tonic-gate * Arena creation flags 747c478bd9Sstevel@tonic-gate */ 757c478bd9Sstevel@tonic-gate #define VMC_POPULATOR 0x00010000 767c478bd9Sstevel@tonic-gate #define VMC_NO_QCACHE 0x00020000 /* cannot use quantum caches */ 777c478bd9Sstevel@tonic-gate #define VMC_IDENTIFIER 0x00040000 /* not backed by memory */ 789dd77bc8SDave Plauger #define VMC_DUMPSAFE 0x00200000 /* can use alternate dump memory */ 797c478bd9Sstevel@tonic-gate /* 807c478bd9Sstevel@tonic-gate * internal use only; the import function uses the vmem_ximport_t interface 81aaa10e67Sha137994 * and may increase the request size if it so desires. 82aaa10e67Sha137994 * VMC_XALIGN, for use with vmem_xcreate, specifies that 83aaa10e67Sha137994 * the address returned by the import function will be 84aaa10e67Sha137994 * aligned according to the alignment argument. 857c478bd9Sstevel@tonic-gate */ 867c478bd9Sstevel@tonic-gate #define VMC_XALLOC 0x00080000 87aaa10e67Sha137994 #define VMC_XALIGN 0x00100000 887c478bd9Sstevel@tonic-gate #define VMC_FLAGS 0xFFFF0000 897c478bd9Sstevel@tonic-gate 907c478bd9Sstevel@tonic-gate /* 917c478bd9Sstevel@tonic-gate * Public segment types 927c478bd9Sstevel@tonic-gate */ 937c478bd9Sstevel@tonic-gate #define VMEM_ALLOC 0x01 947c478bd9Sstevel@tonic-gate #define VMEM_FREE 0x02 957c478bd9Sstevel@tonic-gate 967c478bd9Sstevel@tonic-gate /* 977c478bd9Sstevel@tonic-gate * Implementation-private segment types 987c478bd9Sstevel@tonic-gate */ 997c478bd9Sstevel@tonic-gate #define VMEM_SPAN 0x10 1007c478bd9Sstevel@tonic-gate #define VMEM_ROTOR 0x20 1017c478bd9Sstevel@tonic-gate #define VMEM_WALKER 0x40 1027c478bd9Sstevel@tonic-gate 1037c478bd9Sstevel@tonic-gate /* 1047c478bd9Sstevel@tonic-gate * VMEM_REENTRANT indicates to vmem_walk() that the callback routine may 1057c478bd9Sstevel@tonic-gate * call back into the arena being walked, so vmem_walk() must drop the 1067c478bd9Sstevel@tonic-gate * arena lock before each callback. The caveat is that since the arena 1077c478bd9Sstevel@tonic-gate * isn't locked, its state can change. Therefore it is up to the callback 1087c478bd9Sstevel@tonic-gate * routine to handle cases where the segment isn't of the expected type. 1097c478bd9Sstevel@tonic-gate * For example, we use this to walk heap_arena when generating a crash dump; 1107c478bd9Sstevel@tonic-gate * see segkmem_dump() for sample usage. 1117c478bd9Sstevel@tonic-gate */ 1127c478bd9Sstevel@tonic-gate #define VMEM_REENTRANT 0x80000000 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate typedef struct vmem vmem_t; 1157c478bd9Sstevel@tonic-gate typedef void *(vmem_alloc_t)(vmem_t *, size_t, int); 1167c478bd9Sstevel@tonic-gate typedef void (vmem_free_t)(vmem_t *, void *, size_t); 1177c478bd9Sstevel@tonic-gate 1187c478bd9Sstevel@tonic-gate /* 1197c478bd9Sstevel@tonic-gate * Alternate import style; the requested size is passed in a pointer, 1207c478bd9Sstevel@tonic-gate * which can be increased by the import function if desired. 1217c478bd9Sstevel@tonic-gate */ 122aaa10e67Sha137994 typedef void *(vmem_ximport_t)(vmem_t *, size_t *, size_t, int); 1237c478bd9Sstevel@tonic-gate 1247c478bd9Sstevel@tonic-gate #ifdef _KERNEL 1257c478bd9Sstevel@tonic-gate extern vmem_t *vmem_init(const char *, void *, size_t, size_t, 1267c478bd9Sstevel@tonic-gate vmem_alloc_t *, vmem_free_t *); 1277c478bd9Sstevel@tonic-gate extern void vmem_update(void *); 1287c478bd9Sstevel@tonic-gate extern int vmem_is_populator(); 1297c478bd9Sstevel@tonic-gate extern size_t vmem_seg_size; 1307c478bd9Sstevel@tonic-gate #endif 1317c478bd9Sstevel@tonic-gate 1327c478bd9Sstevel@tonic-gate extern vmem_t *vmem_create(const char *, void *, size_t, size_t, 1337c478bd9Sstevel@tonic-gate vmem_alloc_t *, vmem_free_t *, vmem_t *, size_t, int); 1347c478bd9Sstevel@tonic-gate extern vmem_t *vmem_xcreate(const char *, void *, size_t, size_t, 1357c478bd9Sstevel@tonic-gate vmem_ximport_t *, vmem_free_t *, vmem_t *, size_t, int); 1367c478bd9Sstevel@tonic-gate extern void vmem_destroy(vmem_t *); 1377c478bd9Sstevel@tonic-gate extern void *vmem_alloc(vmem_t *, size_t, int); 1387c478bd9Sstevel@tonic-gate extern void *vmem_xalloc(vmem_t *, size_t, size_t, size_t, size_t, 1397c478bd9Sstevel@tonic-gate void *, void *, int); 1407c478bd9Sstevel@tonic-gate extern void vmem_free(vmem_t *, void *, size_t); 1417c478bd9Sstevel@tonic-gate extern void vmem_xfree(vmem_t *, void *, size_t); 1427c478bd9Sstevel@tonic-gate extern void *vmem_add(vmem_t *, void *, size_t, int); 1437c478bd9Sstevel@tonic-gate extern int vmem_contains(vmem_t *, void *, size_t); 1447c478bd9Sstevel@tonic-gate extern void vmem_walk(vmem_t *, int, void (*)(void *, void *, size_t), void *); 1457c478bd9Sstevel@tonic-gate extern size_t vmem_size(vmem_t *, int); 146*94dd93aeSGeorge Wilson extern void vmem_qcache_reap(vmem_t *vmp); 1477c478bd9Sstevel@tonic-gate 1487c478bd9Sstevel@tonic-gate #ifdef __cplusplus 1497c478bd9Sstevel@tonic-gate } 1507c478bd9Sstevel@tonic-gate #endif 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate #endif /* _SYS_VMEM_H */ 153