bsd/dev/unix_startup.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1992,7 NeXT Computer, Inc.
  30  *
  31  * Unix data structure initialization.
  32  *
  33  */
  34
  35 #include <mach/mach_types.h>
  36
  37 #include <vm/vm_kern.h>
  38 #include <mach/vm_prot.h>
  39
  40 #include <sys/param.h>
  41 #include <sys/buf_internal.h>
  42 #include <sys/clist.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/systm.h>
  45 #include <sys/tty.h>
  46 #include <sys/vnode.h>
  47 #include <sys/sysctl.h>
  48 #include <dev/ppc/cons.h>
  49 #include <pexpert/pexpert.h>
  50
  51 extern vm_map_t mb_map;
  52
  53 #if INET || INET6
  54 extern u_long   tcp_sendspace;
  55 extern u_long   tcp_recvspace;
  56 #endif
  57
  58 void            bsd_bufferinit(void) __attribute__((section("__TEXT, initcode")));
  59 extern void     md_prepare_for_shutdown(int, int, char *);
  60
  61 int             bsd_mbuf_cluster_reserve(void);
  62
  63 /*
  64  * Declare these as initialized data so we can patch them.
  65  */
  66
  67 #ifdef  NBUF
  68 int             max_nbuf_headers = NBUF;
  69 int             niobuf_headers = NBUF / 2;
  70 int             nbuf_hashelements = NBUF;
  71 int             nbuf_headers = NBUF;
  72 #else
  73 int             max_nbuf_headers = 0;
  74 int             niobuf_headers = 0;
  75 int             nbuf_hashelements = 0;
  76 int             nbuf_headers = 0;
  77 #endif
  78
  79 SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf_headers, 0, "");
  80 SYSCTL_INT (_kern, OID_AUTO, maxnbuf, CTLFLAG_RW, &max_nbuf_headers, 0, "");
  81
  82 __private_extern__ int customnbuf = 0;
  83 int             srv = 0;        /* Flag indicates a server boot when set */
  84 int             ncl = 0;
  85 static unsigned int mbuf_poolsz;
  86
  87 vm_map_t        buffer_map;
  88 vm_map_t        bufferhdr_map;
  89
  90
  91 extern void     bsd_startupearly(void) __attribute__((section("__TEXT, initcode")));
  92
  93 void
  94 bsd_startupearly(void)
  95 {
  96         vm_offset_t     firstaddr;
  97         vm_size_t       size;
  98         kern_return_t   ret;
  99
 100         /* clip the number of buf headers upto 16k */
 101         if (max_nbuf_headers == 0)
 102                 max_nbuf_headers = atop(sane_size / 50);        /* Get 2% of ram, but no more than we can map */
 103         if ((customnbuf == 0) && (max_nbuf_headers > 16384))
 104                 max_nbuf_headers = 16384;
 105         if (max_nbuf_headers < CONFIG_MIN_NBUF)
 106                 max_nbuf_headers = CONFIG_MIN_NBUF;
 107
 108         /* clip the number of hash elements  to 200000 */
 109         if ( (customnbuf == 0 ) && nbuf_hashelements == 0) {
 110                 nbuf_hashelements = atop(sane_size / 50);
 111                 if (nbuf_hashelements > 200000)
 112                         nbuf_hashelements = 200000;
 113         } else
 114                 nbuf_hashelements = max_nbuf_headers;
 115
 116         if (niobuf_headers == 0)
 117                 niobuf_headers = max_nbuf_headers;
 118         if (niobuf_headers > 4096)
 119                 niobuf_headers = 4096;
 120         if (niobuf_headers < CONFIG_MIN_NIOBUF)
 121                 niobuf_headers = CONFIG_MIN_NIOBUF;
 122
 123         size = (max_nbuf_headers + niobuf_headers) * sizeof(struct buf);
 124         size = round_page(size);
 125
 126         ret = kmem_suballoc(kernel_map,
 127                             &firstaddr,
 128                             size,
 129                             FALSE,
 130                             VM_FLAGS_ANYWHERE,
 131                             &bufferhdr_map);
 132
 133         if (ret != KERN_SUCCESS)
 134                 panic("Failed to create bufferhdr_map");
 135
 136         ret = kernel_memory_allocate(bufferhdr_map,
 137                                      &firstaddr,
 138                                      size,
 139                                      0,
 140                                      KMA_HERE | KMA_KOBJECT);
 141
 142         if (ret != KERN_SUCCESS)
 143                 panic("Failed to allocate bufferhdr_map");
 144
 145         buf_headers = (struct buf *) firstaddr;
 146         bzero(buf_headers, size);
 147
 148 #if SOCKETS
 149         {
 150 #if CONFIG_USESOCKTHRESHOLD
 151                 static const unsigned int       maxspace = 64 * 1024;
 152 #else
 153                 static const unsigned int       maxspace = 128 * 1024;
 154 #endif
 155                 int             scale;
 156
 157                 nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES;
 158
 159 #if INET || INET6
 160                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 161                         tcp_sendspace *= scale;
 162                         tcp_recvspace *= scale;
 163
 164                         if (tcp_sendspace > maxspace)
 165                                 tcp_sendspace = maxspace;
 166                         if (tcp_recvspace > maxspace)
 167                                 tcp_recvspace = maxspace;
 168                 }
 169 #endif /* INET || INET6 */
 170         }
 171 #endif /* SOCKETS */
 172
 173         /*
 174          * Size vnodes based on memory
 175          * Number vnodes  is (memsize/64k) + 1024
 176          * This is the calculation that is used by launchd in tiger
 177          * we are clipping the max based on 16G
 178          * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168;
 179          * CONFIG_VNODES is set to 263168 for "medium" configurations (the default)
 180          * but can be smaller or larger.
 181          */
 182         desiredvnodes  = (sane_size/65536) + 1024;
 183         if (desiredvnodes > CONFIG_VNODES)
 184                 desiredvnodes = CONFIG_VNODES;
 185 }
 186
 187 void
 188 bsd_bufferinit(void)
 189 {
 190         kern_return_t   ret;
 191
 192         cons.t_dev = makedev(12, 0);
 193
 194         bsd_startupearly();
 195
 196 #if SOCKETS
 197         ret = kmem_suballoc(kernel_map,
 198                             (vm_offset_t *) & mbutl,
 199                             (vm_size_t) (nmbclusters * MCLBYTES),
 200                             FALSE,
 201                             VM_FLAGS_ANYWHERE,
 202                             &mb_map);
 203
 204         if (ret != KERN_SUCCESS)
 205                 panic("Failed to allocate mb_map\n");
 206 #endif /* SOCKETS */
 207
 208         /*
 209          * Set up buffers, so they can be used to read disk labels.
 210          */
 211         bufinit();
 212 }
 213
 214 /* 512 MB hard limit on size of the mbuf pool */
 215 #define MAX_MBUF_POOL   (512 << MBSHIFT)
 216 #define MAX_NCL         (MAX_MBUF_POOL >> MCLSHIFT)
 217
 218 /*
 219  * this has been broken out into a separate routine that
 220  * can be called from the x86 early vm initialization to
 221  * determine how much lo memory to reserve on systems with
 222  * DMA hardware that can't fully address all of the physical
 223  * memory that is present.
 224  */
 225 int
 226 bsd_mbuf_cluster_reserve(void)
 227 {
 228         /* If called more than once, return the previously calculated size */
 229         if (mbuf_poolsz != 0)
 230                 goto done;
 231
 232         PE_parse_boot_argn("ncl", &ncl, sizeof (ncl));
 233
 234         if (sane_size > (64 * 1024 * 1024) || ncl) {
 235                 if ((nmbclusters = ncl) == 0) {
 236                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 237                                 nmbclusters = 32768;
 238                 }
 239                 /* Make sure it's not odd in case ncl is manually set */
 240                 if (nmbclusters & 0x1)
 241                         --nmbclusters;
 242
 243                 /* And obey the upper limit */
 244                 if (nmbclusters > MAX_NCL)
 245                         nmbclusters = MAX_NCL;
 246
 247         }
 248         mbuf_poolsz = nmbclusters << MCLSHIFT;
 249 done:
 250         return (nmbclusters * MCLBYTES);
 251 }