1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 1999-2001, 2003 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _SYS_VMEM_IMPL_H 28*0Sstevel@tonic-gate #define _SYS_VMEM_IMPL_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate #include <sys/vmem.h> 33*0Sstevel@tonic-gate #include <sys/kstat.h> 34*0Sstevel@tonic-gate #include <sys/mutex.h> 35*0Sstevel@tonic-gate #include <sys/condvar.h> 36*0Sstevel@tonic-gate #include <sys/thread.h> 37*0Sstevel@tonic-gate #include <sys/systm.h> 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate #ifdef __cplusplus 40*0Sstevel@tonic-gate extern "C" { 41*0Sstevel@tonic-gate #endif 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate typedef struct vmem_seg vmem_seg_t; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate #define VMEM_STACK_DEPTH 20 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate struct vmem_seg { 48*0Sstevel@tonic-gate /* 49*0Sstevel@tonic-gate * The first four fields must match vmem_freelist_t exactly. 50*0Sstevel@tonic-gate */ 51*0Sstevel@tonic-gate uintptr_t vs_start; /* start of segment (inclusive) */ 52*0Sstevel@tonic-gate uintptr_t vs_end; /* end of segment (exclusive) */ 53*0Sstevel@tonic-gate vmem_seg_t *vs_knext; /* next of kin (alloc, free, span) */ 54*0Sstevel@tonic-gate vmem_seg_t *vs_kprev; /* prev of kin */ 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate vmem_seg_t *vs_anext; /* next in arena */ 57*0Sstevel@tonic-gate vmem_seg_t *vs_aprev; /* prev in arena */ 58*0Sstevel@tonic-gate uint8_t vs_type; /* alloc, free, span */ 59*0Sstevel@tonic-gate uint8_t vs_import; /* non-zero if segment was imported */ 60*0Sstevel@tonic-gate uint8_t vs_depth; /* stack depth if KMF_AUDIT active */ 61*0Sstevel@tonic-gate /* 62*0Sstevel@tonic-gate * The following fields are present only when KMF_AUDIT is set. 63*0Sstevel@tonic-gate */ 64*0Sstevel@tonic-gate kthread_t *vs_thread; 65*0Sstevel@tonic-gate hrtime_t vs_timestamp; 66*0Sstevel@tonic-gate pc_t vs_stack[VMEM_STACK_DEPTH]; 67*0Sstevel@tonic-gate }; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate typedef struct vmem_freelist { 70*0Sstevel@tonic-gate uintptr_t vs_start; /* always zero */ 71*0Sstevel@tonic-gate uintptr_t vs_end; /* segment size */ 72*0Sstevel@tonic-gate vmem_seg_t *vs_knext; /* next of kin */ 73*0Sstevel@tonic-gate vmem_seg_t *vs_kprev; /* prev of kin */ 74*0Sstevel@tonic-gate } vmem_freelist_t; 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate #define VS_SIZE(vsp) ((vsp)->vs_end - (vsp)->vs_start) 77*0Sstevel@tonic-gate 78*0Sstevel@tonic-gate /* 79*0Sstevel@tonic-gate * Segment hashing 80*0Sstevel@tonic-gate */ 81*0Sstevel@tonic-gate #define VMEM_HASH_INDEX(a, s, q, m) \ 82*0Sstevel@tonic-gate ((((a) + ((a) >> (s)) + ((a) >> ((s) << 1))) >> (q)) & (m)) 83*0Sstevel@tonic-gate 84*0Sstevel@tonic-gate #define VMEM_HASH(vmp, addr) \ 85*0Sstevel@tonic-gate (&(vmp)->vm_hash_table[VMEM_HASH_INDEX(addr, \ 86*0Sstevel@tonic-gate (vmp)->vm_hash_shift, (vmp)->vm_qshift, (vmp)->vm_hash_mask)]) 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate #define VMEM_QCACHE_SLABSIZE(max) \ 89*0Sstevel@tonic-gate MAX(1 << highbit(3 * (max)), 64) 90*0Sstevel@tonic-gate 91*0Sstevel@tonic-gate #define VMEM_NAMELEN 30 92*0Sstevel@tonic-gate #define VMEM_HASH_INITIAL 16 93*0Sstevel@tonic-gate #define VMEM_NQCACHE_MAX 16 94*0Sstevel@tonic-gate #define VMEM_FREELISTS (sizeof (void *) * 8) 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate typedef struct vmem_kstat { 97*0Sstevel@tonic-gate kstat_named_t vk_mem_inuse; /* memory in use */ 98*0Sstevel@tonic-gate kstat_named_t vk_mem_import; /* memory imported */ 99*0Sstevel@tonic-gate kstat_named_t vk_mem_total; /* total memory in arena */ 100*0Sstevel@tonic-gate kstat_named_t vk_source_id; /* vmem id of vmem source */ 101*0Sstevel@tonic-gate kstat_named_t vk_alloc; /* number of allocations */ 102*0Sstevel@tonic-gate kstat_named_t vk_free; /* number of frees */ 103*0Sstevel@tonic-gate kstat_named_t vk_wait; /* number of allocations that waited */ 104*0Sstevel@tonic-gate kstat_named_t vk_fail; /* number of allocations that failed */ 105*0Sstevel@tonic-gate kstat_named_t vk_lookup; /* hash lookup count */ 106*0Sstevel@tonic-gate kstat_named_t vk_search; /* freelist search count */ 107*0Sstevel@tonic-gate kstat_named_t vk_populate_wait; /* populates that waited */ 108*0Sstevel@tonic-gate kstat_named_t vk_populate_fail; /* populates that failed */ 109*0Sstevel@tonic-gate kstat_named_t vk_contains; /* vmem_contains() calls */ 110*0Sstevel@tonic-gate kstat_named_t vk_contains_search; /* vmem_contains() search cnt */ 111*0Sstevel@tonic-gate } vmem_kstat_t; 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate struct vmem { 114*0Sstevel@tonic-gate char vm_name[VMEM_NAMELEN]; /* arena name */ 115*0Sstevel@tonic-gate kcondvar_t vm_cv; /* cv for blocking allocations */ 116*0Sstevel@tonic-gate kmutex_t vm_lock; /* arena lock */ 117*0Sstevel@tonic-gate uint32_t vm_id; /* vmem id */ 118*0Sstevel@tonic-gate uint32_t vm_mtbf; /* induced alloc failure rate */ 119*0Sstevel@tonic-gate int vm_cflags; /* arena creation flags */ 120*0Sstevel@tonic-gate int vm_qshift; /* log2(vm_quantum) */ 121*0Sstevel@tonic-gate size_t vm_quantum; /* vmem quantum */ 122*0Sstevel@tonic-gate size_t vm_qcache_max; /* maximum size to front by kmem */ 123*0Sstevel@tonic-gate size_t vm_min_import; /* smallest amount to import */ 124*0Sstevel@tonic-gate void *(*vm_source_alloc)(vmem_t *, size_t, int); 125*0Sstevel@tonic-gate void (*vm_source_free)(vmem_t *, void *, size_t); 126*0Sstevel@tonic-gate vmem_t *vm_source; /* vmem source for imported memory */ 127*0Sstevel@tonic-gate vmem_t *vm_next; /* next in vmem_list */ 128*0Sstevel@tonic-gate kstat_t *vm_ksp; /* kstat */ 129*0Sstevel@tonic-gate ssize_t vm_nsegfree; /* number of free vmem_seg_t's */ 130*0Sstevel@tonic-gate vmem_seg_t *vm_segfree; /* free vmem_seg_t list */ 131*0Sstevel@tonic-gate vmem_seg_t **vm_hash_table; /* allocated-segment hash table */ 132*0Sstevel@tonic-gate size_t vm_hash_mask; /* hash_size - 1 */ 133*0Sstevel@tonic-gate size_t vm_hash_shift; /* log2(vm_hash_mask + 1) */ 134*0Sstevel@tonic-gate ulong_t vm_freemap; /* bitmap of non-empty freelists */ 135*0Sstevel@tonic-gate vmem_seg_t vm_seg0; /* anchor segment */ 136*0Sstevel@tonic-gate vmem_seg_t vm_rotor; /* rotor for VM_NEXTFIT allocations */ 137*0Sstevel@tonic-gate vmem_seg_t *vm_hash0[VMEM_HASH_INITIAL]; /* initial hash table */ 138*0Sstevel@tonic-gate void *vm_qcache[VMEM_NQCACHE_MAX]; /* quantum caches */ 139*0Sstevel@tonic-gate vmem_freelist_t vm_freelist[VMEM_FREELISTS + 1]; /* power-of-2 flists */ 140*0Sstevel@tonic-gate vmem_kstat_t vm_kstat; /* kstat data */ 141*0Sstevel@tonic-gate }; 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate #ifdef __cplusplus 144*0Sstevel@tonic-gate } 145*0Sstevel@tonic-gate #endif 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate #endif /* _SYS_VMEM_IMPL_H */ 148