sys/platform/pc64/x86_64/autoconf.c

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * Copyright (c) 2008 The DragonFly Project.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * William Jolitz.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      from: @(#)autoconf.c    7.1 (Berkeley) 5/9/91
  34  * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
  35  */
  36
  37 /*
  38  * Setup the system to run on the current machine.
  39  *
  40  * Configure() is called at boot time and initializes the vba
  41  * device tables and the memory controller monitoring.  Available
  42  * devices are determined (from possibilities mentioned in ioconf.c),
  43  * and the drivers are initialized.
  44  */
  45 #include "opt_bootp.h"
  46 #include "opt_cd9660.h"
  47 #include "opt_nfs.h"
  48 #include "opt_nfsroot.h"
  49 #include "opt_rootdevname.h"
  50
  51 #include "use_isa.h"
  52
  53 #include <sys/param.h>
  54 #include <sys/systm.h>
  55 #include <sys/bootmaj.h>
  56 #include <sys/bus.h>
  57 #include <sys/conf.h>
  58 #include <sys/diskslice.h>
  59 #include <sys/reboot.h>
  60 #include <sys/kernel.h>
  61 #include <sys/malloc.h>
  62 #include <sys/mount.h>
  63 #include <sys/cons.h>
  64 #include <sys/thread.h>
  65 #include <sys/device.h>
  66 #include <sys/machintr.h>
  67
  68 #include <machine/bootinfo.h>
  69 #include <machine/md_var.h>
  70 #include <machine/smp.h>
  71 #include <machine_base/icu/icu.h>
  72
  73 #include <machine/pcb.h>
  74 #include <machine/pcb_ext.h>
  75 #include <machine/globaldata.h>
  76
  77 #if NISA > 0
  78 #include <bus/isa/isavar.h>
  79
  80 device_t isa_bus_device = NULL;
  81 #endif
  82
  83 static void     configure_first (void *);
  84 static void     configure (void *);
  85 static void     configure_final (void *);
  86
  87 #if defined(NFS) && defined(NFS_ROOT)
  88 #if !defined(BOOTP_NFSROOT)
  89 static void     pxe_setup_nfsdiskless(void);
  90 #endif
  91 #endif
  92
  93 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
  94 /* SI_ORDER_SECOND is hookable */
  95 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
  96 /* SI_ORDER_MIDDLE is hookable */
  97 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
  98
  99 cdev_t  rootdev = NULL;
 100 cdev_t  dumpdev = NULL;
 101
 102 /*
 103  * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
 104  * be able to max-out a GigE link if the server supports it.  Many servers
 105  * do not so the default is 8192.
 106  *
 107  * nfsroot.rahead defaults to something reasonable, can be overridden.
 108  */
 109 static int nfsroot_iosize = 8192;
 110 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize);
 111 static int nfsroot_rahead = 4;
 112 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead);
 113
 114 /*
 115  * Determine i/o configuration for a machine.
 116  */
 117 static void
 118 configure_first(void *dummy)
 119 {
 120 }
 121
 122 static void
 123 configure(void *dummy)
 124 {
 125 #if NISA > 0
 126         void *low_dma_reserve;
 127
 128         /*
 129          * Try to reserve 512k of low dma memory for later isa attach.
 130          * Document as a REALLY bad hack.
 131          */
 132         low_dma_reserve = contigmalloc(0x80000, M_TEMP, M_NOWAIT, 0ul,
 133                                        0xfffffful, 1ul, 0x20000ul);
 134         if (bootverbose)
 135                 kprintf("low dma reserve placed @ %p\n", low_dma_reserve);
 136 #endif
 137
 138         /*
 139          * This will configure all devices, generally starting with the
 140          * nexus (pc64/x86_64/nexus.c).  The nexus ISA code explicitly
 141          * dummies up the attach in order to delay legacy initialization
 142          * until after all other busses/subsystems have had a chance
 143          * at those resources.
 144          */
 145         root_bus_configure();
 146
 147 #if NISA > 0
 148         /*
 149          * Free up reserve if we got it.
 150          */
 151         if (low_dma_reserve != NULL) {
 152                 contigfree(low_dma_reserve, 0x80000, M_TEMP);
 153         } else if (bootverbose) {
 154                 kprintf("low dma reserve was not allocated\n");
 155         }
 156
 157         /*
 158          * Explicitly probe and attach ISA last.  The isa bus saves
 159          * it's device node at attach time for us here.
 160          */
 161         if (isa_bus_device)
 162                 isa_probe_children(isa_bus_device);
 163 #endif
 164
 165         /*
 166          * Allow lowering of the ipl to the lowest kernel level if we
 167          * panic (or call tsleep() before clearing `cold').  No level is
 168          * completely safe (since a panic may occur in a critical region
 169          * at splhigh()), but we want at least bio interrupts to work.
 170          */
 171         safepri = TDPRI_KERN_USER;
 172 }
 173
 174 /*
 175  * Finalize configure.  Reprobe for the console, in case it was one
 176  * of the devices which attached, then finish console initialization.
 177  */
 178 static void
 179 configure_final(void *dummy)
 180 {
 181         cninit();
 182         cninit_finish();
 183 }
 184
 185 #ifdef BOOTP
 186 void bootpc_init(void);
 187 #endif
 188 /*
 189  * Do legacy root filesystem discovery.
 190  */
 191 void
 192 cpu_rootconf(void)
 193 {
 194 #ifdef BOOTP
 195         bootpc_init();
 196 #endif
 197 #if defined(NFS) && defined(NFS_ROOT)
 198 #if !defined(BOOTP_NFSROOT)
 199         pxe_setup_nfsdiskless();
 200         if (nfs_diskless_valid)
 201 #endif
 202                 rootdevnames[0] = "nfs:";
 203 #endif
 204 }
 205 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL);
 206
 207 #if defined(NFS) && defined(NFS_ROOT)
 208 #if !defined(BOOTP_NFSROOT)
 209
 210 #include <sys/socket.h>
 211 #include <net/if.h>
 212 #include <net/if_dl.h>
 213 #include <net/if_types.h>
 214 #include <net/if_var.h>
 215 #include <net/ethernet.h>
 216 #include <netinet/in.h>
 217 #include <vfs/nfs/rpcv2.h>
 218 #include <vfs/nfs/nfsproto.h>
 219 #include <vfs/nfs/nfs.h>
 220 #include <vfs/nfs/nfsdiskless.h>
 221
 222 extern struct nfs_diskless      nfs_diskless;
 223
 224 /*
 225  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 226  * exist the sockaddr will remain zerod out (callers typically just check
 227  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 228  */
 229 static int
 230 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 231 {
 232         u_int32_t       a[4];
 233         char            *cp;
 234
 235         bzero(sa, sizeof(*sa));
 236
 237         if ((cp = kgetenv(ev)) == NULL)
 238                 return(1);
 239         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 240                 return(1);
 241         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 242                 return(1);
 243         /* XXX is this ordering correct? */
 244         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 245         sa->sin_len = sizeof(*sa);
 246         sa->sin_family = AF_INET;
 247         return(0);
 248 }
 249
 250 static int
 251 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 252 {
 253         char            *cp;
 254         u_int32_t       a[6];
 255
 256         bzero(sa, sizeof(*sa));
 257         sa->sdl_len = sizeof(*sa);
 258         sa->sdl_family = AF_LINK;
 259         sa->sdl_type = IFT_ETHER;
 260         sa->sdl_alen = ETHER_ADDR_LEN;
 261         if ((cp = kgetenv(ev)) == NULL)
 262                 return(1);
 263         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 264                 return(1);
 265         sa->sdl_data[0] = a[0];
 266         sa->sdl_data[1] = a[1];
 267         sa->sdl_data[2] = a[2];
 268         sa->sdl_data[3] = a[3];
 269         sa->sdl_data[4] = a[4];
 270         sa->sdl_data[5] = a[5];
 271         return(0);
 272 }
 273
 274 static int
 275 decode_nfshandle(char *ev, u_char *fh)
 276 {
 277         u_char  *cp;
 278         int     len, val;
 279
 280         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 281                 return(0);
 282         len = 0;
 283         cp++;
 284         for (;;) {
 285                 if (*cp == 'X')
 286                         return(len);
 287                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 288                         return(0);
 289                 *(fh++) = val;
 290                 len++;
 291                 cp += 2;
 292                 if (len > NFSX_V2FH)
 293                     return(0);
 294         }
 295 }
 296
 297 /*
 298  * Populate the essential fields in the nfsv3_diskless structure.
 299  *
 300  * The loader is expected to export the following environment variables:
 301  *
 302  * boot.netif.ip                IP address on boot interface
 303  * boot.netif.netmask           netmask on boot interface
 304  * boot.netif.gateway           default gateway (optional)
 305  * boot.netif.hwaddr            hardware address of boot interface
 306  * boot.nfsroot.server          IP address of root filesystem server
 307  * boot.nfsroot.path            path of the root filesystem on server
 308  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 309  */
 310 static void
 311 pxe_setup_nfsdiskless(void)
 312 {
 313         struct nfs_diskless     *nd = &nfs_diskless;
 314         struct ifnet            *ifp;
 315         struct sockaddr_dl      *sdl, ourdl;
 316         struct sockaddr_in      myaddr, netmask;
 317         char                    *cp;
 318
 319         /* set up interface */
 320         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 321                 return;
 322         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 323                 kprintf("PXE: no netmask\n");
 324                 return;
 325         }
 326         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 327         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 328         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 329                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 330         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 331
 332         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 333                 kprintf("PXE: no hardware address\n");
 334                 return;
 335         }
 336         ifnet_lock();
 337         TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
 338                 struct ifaddr_container *ifac;
 339
 340                 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
 341                         struct ifaddr *ifa = ifac->ifa;
 342
 343                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 344                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 345                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 346                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 347                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 348                                           ourdl.sdl_data + ourdl.sdl_nlen,
 349                                           sdl->sdl_alen)) {
 350                                         strlcpy(nd->myif.ifra_name,
 351                                             ifp->if_xname,
 352                                             sizeof(nd->myif.ifra_name));
 353                                         ifnet_unlock();
 354                                         goto match_done;
 355                                 }
 356                         }
 357                 }
 358         }
 359         ifnet_unlock();
 360         kprintf("PXE: no interface\n");
 361         return; /* no matching interface */
 362 match_done:
 363         /* set up gateway */
 364         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 365
 366         /* XXX set up swap? */
 367
 368         /* set up root mount */
 369         nd->root_args.rsize = nfsroot_iosize;
 370         nd->root_args.wsize = nfsroot_iosize;
 371         nd->root_args.sotype = SOCK_STREAM;
 372         nd->root_args.readahead = nfsroot_rahead;
 373         nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT |
 374                               NFSMNT_READAHEAD;
 375         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 376                 kprintf("PXE: no server\n");
 377                 return;
 378         }
 379         nd->root_saddr.sin_port = htons(NFS_PORT);
 380
 381         /*
 382          * A tftp-only loader may pass NFS path information without a
 383          * root handle.  Generate a warning but continue configuring.
 384          */
 385         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 386                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 387         }
 388         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 389                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 390
 391         nfs_diskless_valid = 1;
 392 }
 393
 394 #endif
 395 #endif