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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_MEM_CONFIG_H 27 #define _SYS_MEM_CONFIG_H 28 29 /* 30 * Memory add/delete interfaces. 31 */ 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #ifdef _KERNEL 38 39 /* 40 * Memory add/delete client interface. 41 */ 42 43 extern int kphysm_add_memory_dynamic(pfn_t base, pgcnt_t npgs); 44 45 typedef void *memhandle_t; 46 47 /* 48 * Managed pages have associated page structures ('page_t's). 49 * The difference between phys_pages and managed is accounted for by 50 * boot time memory allocation for the kernel text and data, and also 51 * for page structures. 52 */ 53 typedef struct { 54 pgcnt_t phys_pages; /* total physical pages */ 55 pgcnt_t managed; /* providing this many managed pages */ 56 pgcnt_t nonrelocatable; /* of which this many non-relocatable */ 57 pfn_t first_nonrelocatable; 58 pfn_t last_nonrelocatable; 59 } memquery_t; 60 61 typedef struct { 62 pgcnt_t phys_pages; /* total physical pages */ 63 pgcnt_t managed; /* providing this many managed pages */ 64 pgcnt_t collected; /* done when == managed */ 65 } memdelstat_t; 66 67 extern int kphysm_del_gethandle(memhandle_t *); 68 69 extern int kphysm_del_span(memhandle_t, pfn_t base, pgcnt_t npgs); 70 71 extern int kphysm_del_span_query(pfn_t base, pgcnt_t npgs, memquery_t *); 72 73 extern int kphysm_del_start(memhandle_t, 74 void (*complete)(void *, int error), void *arg); 75 76 extern int kphysm_del_release(memhandle_t); 77 78 extern int kphysm_del_cancel(memhandle_t); 79 80 extern int kphysm_del_status(memhandle_t, memdelstat_t *); 81 82 /* 83 * Error returns. 84 */ 85 86 #define KPHYSM_OK 0 /* Success */ 87 #define KPHYSM_ESPAN 1 /* Memory already in use (add) */ 88 #define KPHYSM_EFAULT 2 /* Memory access test failed (add) */ 89 #define KPHYSM_ERESOURCE 3 /* Some resource was not available */ 90 #define KPHYSM_ENOTSUP 4 /* Operation not supported */ 91 #define KPHYSM_ENOHANDLES 5 /* Cannot allocate any more handles */ 92 #define KPHYSM_ENONRELOC 6 /* Non-relocatable pages in span */ 93 #define KPHYSM_EHANDLE 7 /* Bad handle supplied */ 94 #define KPHYSM_EBUSY 8 /* Memory in span is being deleted */ 95 #define KPHYSM_ENOTVIABLE 9 /* VM viability test failed */ 96 #define KPHYSM_ESEQUENCE 10 /* Function called out of sequence */ 97 #define KPHYSM_ENOWORK 11 /* No pages to delete */ 98 #define KPHYSM_ECANCELLED 12 /* kphysm_del_cancel (for complete) */ 99 #define KPHYSM_EREFUSED 13 /* kphysm_pre_del fail (for complete) */ 100 #define KPHYSM_ENOTFINISHED 14 /* Thread not finished */ 101 #define KPHYSM_ENOTRUNNING 15 /* Thread not running */ 102 #define KPHYSM_EDUP 16 /* Memory span duplicate (delete) */ 103 104 /* 105 * Memory system change call-back interface. 106 */ 107 108 #define KPHYSM_SETUP_VECTOR_VERSION 1 109 typedef struct { 110 uint_t version; 111 void (*post_add)(void *arg, pgcnt_t delta_pages); 112 int (*pre_del)(void *arg, pgcnt_t delta_pages); 113 void (*post_del)(void *arg, pgcnt_t delta_pages, 114 int cancelled); 115 } kphysm_setup_vector_t; 116 117 /* 118 * The register function returns 0 if the vector/arg pair is recorded 119 * successfully. 120 * The error returns are: 121 * EEXIST if the vector/arg pair is already registered. 122 * EINVAL if the vector version is not supported. 123 * ENOMEM if the registration could not be stored. 124 * 125 * A return of EEXIST should be considered a program logic error by 126 * the caller. 127 */ 128 extern int kphysm_setup_func_register(kphysm_setup_vector_t *, void *arg); 129 130 extern void kphysm_setup_func_unregister(kphysm_setup_vector_t *, void *arg); 131 132 133 /* 134 * Memory add/delete architecture (lower) interfaces. 135 * These interfaces should not be used by drivers. 136 */ 137 138 extern int arch_kphysm_del_span_ok(pfn_t, pgcnt_t); 139 extern int arch_kphysm_relocate(pfn_t, pgcnt_t); 140 extern int arch_kphysm_del_supported(void); 141 142 extern int pfn_is_being_deleted(pfn_t); 143 144 #endif /* _KERNEL */ 145 146 #ifdef __cplusplus 147 } 148 #endif 149 150 #endif /* _SYS_MEM_CONFIG_H */ 151