osfmk/ipc/ipc_init.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
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  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * Mach Operating System
  35  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  36  * All Rights Reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software and its
  39  * documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  46  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  51  *  School of Computer Science
  52  *  Carnegie Mellon University
  53  *  Pittsburgh PA 15213-3890
  54  *
  55  * any improvements or extensions that they make and grant Carnegie Mellon
  56  * the rights to redistribute these changes.
  57  */
  58 /*
  59  */
  60 /*
  61  *      File:   ipc/ipc_init.c
  62  *      Author: Rich Draves
  63  *      Date:   1989
  64  *
  65  *      Functions to initialize the IPC system.
  66  */
  67
  68 #include <mach_debug.h>
  69 #include <mach_rt.h>
  70
  71 #include <mach/port.h>
  72 #include <mach/kern_return.h>
  73
  74 #include <kern/kern_types.h>
  75 #include <kern/kalloc.h>
  76 #include <kern/mach_param.h>
  77 #include <kern/ipc_host.h>
  78 #include <kern/ipc_mig.h>
  79 #include <kern/host_notify.h>
  80 #include <kern/mk_timer.h>
  81 #include <kern/misc_protos.h>
  82 #include <kern/sync_lock.h>
  83 #include <kern/sync_sema.h>
  84 #include <vm/vm_map.h>
  85 #include <vm/vm_kern.h>
  86
  87 #include <ipc/ipc_entry.h>
  88 #include <ipc/ipc_space.h>
  89 #include <ipc/ipc_object.h>
  90 #include <ipc/ipc_port.h>
  91 #include <ipc/ipc_pset.h>
  92 #include <ipc/ipc_notify.h>
  93 #include <ipc/ipc_kmsg.h>
  94 #include <ipc/ipc_hash.h>
  95 #include <ipc/ipc_init.h>
  96 #include <ipc/ipc_table.h>
  97
  98 #include <mach/machine/ndr_def.h>   /* NDR_record */
  99
 100 vm_map_t ipc_kernel_map;
 101 vm_size_t ipc_kernel_map_size = 1024 * 1024;
 102
 103 vm_map_t ipc_kernel_copy_map;
 104 #define IPC_KERNEL_COPY_MAP_SIZE (8 * 1024 * 1024)
 105 vm_size_t ipc_kernel_copy_map_size = IPC_KERNEL_COPY_MAP_SIZE;
 106 vm_size_t ipc_kmsg_max_vm_space = (IPC_KERNEL_COPY_MAP_SIZE * 7)/8;
 107
 108 int ipc_space_max = SPACE_MAX;
 109 int ipc_tree_entry_max = ITE_MAX;
 110 int ipc_port_max = PORT_MAX;
 111 int ipc_pset_max = SET_MAX;
 112
 113 extern void ikm_cache_init(void);
 114
 115 /*
 116  *      Routine:        ipc_bootstrap
 117  *      Purpose:
 118  *              Initialization needed before the kernel task
 119  *              can be created.
 120  */
 121
 122 void
 123 ipc_bootstrap(void)
 124 {
 125         kern_return_t kr;
 126
 127         ipc_port_multiple_lock_init();
 128
 129         ipc_port_timestamp_lock_init();
 130         ipc_port_timestamp_data = 0;
 131
 132         /* all IPC zones should be exhaustible */
 133
 134         ipc_space_zone = zinit(sizeof(struct ipc_space),
 135                                ipc_space_max * sizeof(struct ipc_space),
 136                                sizeof(struct ipc_space),
 137                                "ipc spaces");
 138 #if 0
 139         /* make it exhaustible */
 140         zone_change(ipc_space_zone, Z_EXHAUST, TRUE);
 141 #endif
 142
 143         ipc_tree_entry_zone =
 144                 zinit(sizeof(struct ipc_tree_entry),
 145                         ipc_tree_entry_max * sizeof(struct ipc_tree_entry),
 146                         sizeof(struct ipc_tree_entry),
 147                         "ipc tree entries");
 148 #if 0
 149         /* make it exhaustible */
 150         zone_change(ipc_tree_entry_zone, Z_EXHAUST, TRUE);
 151 #endif
 152
 153         /*
 154          * populate all port(set) zones
 155          */
 156         ipc_object_zones[IOT_PORT] =
 157                 zinit(sizeof(struct ipc_port),
 158                       ipc_port_max * sizeof(struct ipc_port),
 159                       sizeof(struct ipc_port),
 160                       "ipc ports");
 161         /*
 162          * XXX  Can't make the port zone exhaustible because the kernel
 163          * XXX  panics when port allocation for an internal object fails.
 164          *zone_change(ipc_object_zones[IOT_PORT], Z_EXHAUST, TRUE);
 165          */
 166
 167         ipc_object_zones[IOT_PORT_SET] =
 168                 zinit(sizeof(struct ipc_pset),
 169                       ipc_pset_max * sizeof(struct ipc_pset),
 170                       sizeof(struct ipc_pset),
 171                       "ipc port sets");
 172         /* make it exhaustible */
 173         zone_change(ipc_object_zones[IOT_PORT_SET], Z_EXHAUST, TRUE);
 174
 175         /*
 176          * Create the basic ipc_kmsg_t zone (the one we also cache)
 177          * elements at the processor-level to avoid the locking.
 178          */
 179         ipc_kmsg_zone = zinit(IKM_SAVED_KMSG_SIZE,
 180                               ipc_port_max * MACH_PORT_QLIMIT_MAX *
 181                               IKM_SAVED_KMSG_SIZE,
 182                               IKM_SAVED_KMSG_SIZE,
 183                               "ipc kmsgs");
 184
 185         /* create special spaces */
 186
 187         kr = ipc_space_create_special(&ipc_space_kernel);
 188         assert(kr == KERN_SUCCESS);
 189
 190
 191         kr = ipc_space_create_special(&ipc_space_reply);
 192         assert(kr == KERN_SUCCESS);
 193
 194         /* initialize modules with hidden data structures */
 195
 196 #if     MACH_ASSERT
 197         ipc_port_debug_init();
 198 #endif
 199         mig_init();
 200         ipc_table_init();
 201         ipc_hash_init();
 202         semaphore_init();
 203         lock_set_init();
 204         mk_timer_init();
 205         host_notify_init();
 206 }
 207
 208 /*
 209  * XXX tunable, belongs in mach.message.h
 210  */
 211 #define MSG_OOL_SIZE_SMALL_MAX 4096
 212 vm_size_t msg_ool_size_small;
 213
 214 /*
 215  *      Routine:        ipc_init
 216  *      Purpose:
 217  *              Final initialization of the IPC system.
 218  */
 219
 220 void
 221 ipc_init(void)
 222 {
 223         kern_return_t retval;
 224         vm_offset_t min;
 225
 226         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_map_size,
 227                                TRUE, VM_FLAGS_ANYWHERE, &ipc_kernel_map);
 228
 229         if (retval != KERN_SUCCESS)
 230                 panic("ipc_init: kmem_suballoc of ipc_kernel_map failed");
 231
 232         retval = kmem_suballoc(kernel_map, &min, ipc_kernel_copy_map_size,
 233                                TRUE, VM_FLAGS_ANYWHERE, &ipc_kernel_copy_map);
 234
 235         if (retval != KERN_SUCCESS)
 236                 panic("ipc_init: kmem_suballoc of ipc_kernel_copy_map failed");
 237
 238         ipc_kernel_copy_map->no_zero_fill = TRUE;
 239         ipc_kernel_copy_map->wait_for_space = TRUE;
 240
 241         /*
 242          * As an optimization, 'small' out of line data regions using a
 243          * physical copy strategy are copied into kalloc'ed buffers.
 244          * The value of 'small' is determined here.  Requests kalloc()
 245          * with sizes greater or equal to kalloc_max_prerounded may fail.
 246          */
 247         if (kalloc_max_prerounded <=  MSG_OOL_SIZE_SMALL_MAX) {
 248                 msg_ool_size_small = kalloc_max_prerounded;
 249         }
 250         else {
 251                 msg_ool_size_small = MSG_OOL_SIZE_SMALL_MAX;
 252         }
 253
 254         ipc_host_init();
 255 }