sys/platform/vkernel64/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/buf.h>
  58 #include <sys/conf.h>
  59 #include <sys/diskslice.h>
  60 #include <sys/reboot.h>
  61 #include <sys/kernel.h>
  62 #include <sys/malloc.h>
  63 #include <sys/mount.h>
  64 #include <sys/cons.h>
  65 #include <sys/thread.h>
  66 #include <sys/device.h>
  67 #include <sys/machintr.h>
  68
  69 #include <vm/vm_kern.h>
  70 #include <vm/vm_extern.h>
  71 #include <vm/vm_pager.h>
  72
  73 #if 0
  74 #include <machine/pcb.h>
  75 #include <machine/pcb_ext.h>
  76 #endif
  77 #include <machine/smp.h>
  78 #include <machine/globaldata.h>
  79 #include <machine/md_var.h>
  80
  81 #if NISA > 0
  82 #include <bus/isa/isavar.h>
  83
  84 device_t isa_bus_device = NULL;
  85 #endif
  86
  87 static void cpu_startup (void *);
  88 static void configure_first (void *);
  89 static void configure (void *);
  90 static void configure_final (void *);
  91
  92 #if defined(NFS) && defined(NFS_ROOT)
  93 #if !defined(BOOTP_NFSROOT)
  94 static void     pxe_setup_nfsdiskless(void);
  95 #endif
  96 #endif
  97
  98 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
  99 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 100 /* SI_ORDER_SECOND is hookable */
 101 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 102 /* SI_ORDER_MIDDLE is hookable */
 103 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 104
 105 cdev_t  rootdev = NULL;
 106 cdev_t  dumpdev = NULL;
 107
 108 /*
 109  * nfsroot.iosize may be set in loader.conf, 32768 is recommended to
 110  * be able to max-out a GigE link if the server supports it.  Many servers
 111  * do not so the default is 8192.
 112  *
 113  * nfsroot.rahead defaults to something reasonable, can be overridden.
 114  */
 115 static int nfsroot_iosize = 8192;
 116 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize);
 117 static int nfsroot_rahead = 4;
 118 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead);
 119
 120 /*
 121  *
 122  */
 123 static void
 124 cpu_startup(void *dummy)
 125 {
 126         vm_offset_t buffer_sva;
 127         vm_offset_t buffer_eva;
 128         vm_offset_t pager_sva;
 129         vm_offset_t pager_eva;
 130
 131         kprintf("%s", version);
 132         kprintf("real memory = %ju (%juK bytes)\n",
 133             (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024));
 134
 135         if (nbuf == 0) {
 136                 int factor = 4 * NBUFCALCSIZE / 1024;
 137                 int kbytes = Maxmem * (PAGE_SIZE / 1024);
 138
 139                 nbuf = 50;
 140                 if (kbytes > 4096)
 141                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 142                 if (kbytes > 65536)
 143                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 144                 if (maxbcache && nbuf > maxbcache / NBUFCALCSIZE)
 145                         nbuf = maxbcache / NBUFCALCSIZE;
 146         }
 147         if (nbuf > (virtual_end - virtual_start) / (MAXBSIZE * 2)) {
 148                 nbuf = (virtual_end - virtual_start) / (MAXBSIZE * 2);
 149                 kprintf("Warning: nbufs capped at %ld\n", nbuf);
 150         }
 151
 152         nswbuf_mem = lmax(lmin(nbuf / 32, 32), 4);
 153 #ifdef NSWBUF_MIN
 154         if (nswbuf_mem < NSWBUF_MIN)
 155                 nswbuf_mem = NSWBUF_MIN;
 156 #endif
 157         nswbuf_kva = lmax(lmin(nbuf / 4, 256), 16);
 158 #ifdef NSWBUF_MIN
 159         if (nswbuf_kva < NSWBUF_MIN)
 160                 nswbuf_kva = NSWBUF_MIN;
 161 #endif
 162
 163         /*
 164          * Allocate memory for the buffer cache
 165          */
 166         buf = (void *)kmem_alloc(&kernel_map,
 167                                  nbuf * sizeof(struct buf),
 168                                  VM_SUBSYS_BUF);
 169         swbuf_mem = (void *)kmem_alloc(&kernel_map,
 170                                        nswbuf_mem * sizeof(struct buf),
 171                                        VM_SUBSYS_BUF);
 172         swbuf_kva = (void *)kmem_alloc(&kernel_map,
 173                                        nswbuf_kva * sizeof(struct buf),
 174                                        VM_SUBSYS_BUF);
 175
 176         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 177                       (nbuf * MAXBSIZE * 2) +
 178                       (nswbuf_mem + nswbuf_kva) *MAXPHYS +
 179                       pager_map_size);
 180         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 181                       (nbuf * MAXBSIZE * 2));
 182         buffer_map.system_map = 1;
 183         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 184                       (nswbuf_mem + nswbuf_kva) *MAXPHYS +
 185                       pager_map_size);
 186         pager_map.system_map = 1;
 187         kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count),
 188                 ptoa(vmstats.v_free_count) / 1024);
 189         mp_start();
 190         mp_announce();
 191         cpu_setregs();
 192 }
 193
 194 /*
 195  * Determine i/o configuration for a machine.
 196  */
 197 static void
 198 configure_first(void *dummy)
 199 {
 200 }
 201
 202 static void
 203 configure(void *dummy)
 204 {
 205         /*
 206          * Final interrupt support acviation, then enable hardware interrupts.
 207          */
 208         MachIntrABI.finalize();
 209         cpu_enable_intr();
 210
 211         /*
 212          * This will configure all devices, generally starting with the
 213          * nexus (pc64/x86_64/nexus.c).  The nexus ISA code explicitly
 214          * dummies up the attach in order to delay legacy initialization
 215          * until after all other busses/subsystems have had a chance
 216          * at those resources.
 217          */
 218         root_bus_configure();
 219
 220 #if NISA > 0
 221         /*
 222          * Explicitly probe and attach ISA last.  The isa bus saves
 223          * it's device node at attach time for us here.
 224          */
 225         if (isa_bus_device)
 226                 isa_probe_children(isa_bus_device);
 227 #endif
 228
 229         /*
 230          * Allow lowering of the ipl to the lowest kernel level if we
 231          * panic (or call tsleep() before clearing `cold').  No level is
 232          * completely safe (since a panic may occur in a critical region
 233          * at splhigh()), but we want at least bio interrupts to work.
 234          */
 235         safepri = TDPRI_KERN_USER;
 236 }
 237
 238 static void
 239 configure_final(void *dummy)
 240 {
 241         cninit_finish();
 242
 243         if (bootverbose)
 244                 kprintf("Device configuration finished.\n");
 245 }
 246
 247 #ifdef BOOTP
 248 void bootpc_init(void);
 249 #endif
 250 /*
 251  * Do legacy root filesystem discovery.
 252  */
 253 void
 254 cpu_rootconf(void)
 255 {
 256 #ifdef BOOTP
 257         bootpc_init();
 258 #endif
 259 #if defined(NFS) && defined(NFS_ROOT)
 260 #if !defined(BOOTP_NFSROOT)
 261         pxe_setup_nfsdiskless();
 262         if (nfs_diskless_valid)
 263 #endif
 264                 rootdevnames[0] = "nfs:";
 265 #endif
 266 }
 267 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL);
 268
 269 #if defined(NFS) && defined(NFS_ROOT)
 270 #if !defined(BOOTP_NFSROOT)
 271
 272 #include <sys/socket.h>
 273 #include <net/if.h>
 274 #include <net/if_dl.h>
 275 #include <net/if_types.h>
 276 #include <net/if_var.h>
 277 #include <net/ethernet.h>
 278 #include <netinet/in.h>
 279 #include <vfs/nfs/rpcv2.h>
 280 #include <vfs/nfs/nfsproto.h>
 281 #include <vfs/nfs/nfs.h>
 282 #include <vfs/nfs/nfsdiskless.h>
 283
 284 extern struct nfs_diskless      nfs_diskless;
 285
 286 /*
 287  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 288  * exist the sockaddr will remain zerod out (callers typically just check
 289  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 290  */
 291 static int
 292 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 293 {
 294         u_int32_t       a[4];
 295         char            *cp;
 296
 297         bzero(sa, sizeof(*sa));
 298
 299         if ((cp = kgetenv(ev)) == NULL)
 300                 return(1);
 301         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 302                 return(1);
 303         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 304                 return(1);
 305         /* XXX is this ordering correct? */
 306         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 307         sa->sin_len = sizeof(*sa);
 308         sa->sin_family = AF_INET;
 309         return(0);
 310 }
 311
 312 static int
 313 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 314 {
 315         char            *cp;
 316         u_int32_t       a[6];
 317
 318         bzero(sa, sizeof(*sa));
 319         sa->sdl_len = sizeof(*sa);
 320         sa->sdl_family = AF_LINK;
 321         sa->sdl_type = IFT_ETHER;
 322         sa->sdl_alen = ETHER_ADDR_LEN;
 323         if ((cp = kgetenv(ev)) == NULL)
 324                 return(1);
 325         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 326                 return(1);
 327         sa->sdl_data[0] = a[0];
 328         sa->sdl_data[1] = a[1];
 329         sa->sdl_data[2] = a[2];
 330         sa->sdl_data[3] = a[3];
 331         sa->sdl_data[4] = a[4];
 332         sa->sdl_data[5] = a[5];
 333         return(0);
 334 }
 335
 336 static int
 337 decode_nfshandle(char *ev, u_char *fh)
 338 {
 339         u_char  *cp;
 340         int     len, val;
 341
 342         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 343                 return(0);
 344         len = 0;
 345         cp++;
 346         for (;;) {
 347                 if (*cp == 'X')
 348                         return(len);
 349                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 350                         return(0);
 351                 *(fh++) = val;
 352                 len++;
 353                 cp += 2;
 354                 if (len > NFSX_V2FH)
 355                     return(0);
 356         }
 357 }
 358
 359 /*
 360  * Populate the essential fields in the nfsv3_diskless structure.
 361  *
 362  * The loader is expected to export the following environment variables:
 363  *
 364  * boot.netif.ip                IP address on boot interface
 365  * boot.netif.netmask           netmask on boot interface
 366  * boot.netif.gateway           default gateway (optional)
 367  * boot.netif.hwaddr            hardware address of boot interface
 368  * boot.netif.name              name of boot interface (instead of hw addr)
 369  * boot.nfsroot.server          IP address of root filesystem server
 370  * boot.nfsroot.path            path of the root filesystem on server
 371  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 372  */
 373 static void
 374 pxe_setup_nfsdiskless(void)
 375 {
 376         struct nfs_diskless     *nd = &nfs_diskless;
 377         struct ifnet            *ifp;
 378         struct ifaddr           *ifa;
 379         struct sockaddr_dl      *sdl, ourdl;
 380         struct sockaddr_in      myaddr, netmask;
 381         char                    *cp;
 382
 383         /* set up interface */
 384         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 385                 return;
 386         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 387                 kprintf("PXE: no netmask\n");
 388                 return;
 389         }
 390         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 391         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 392         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 393                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 394         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 395
 396         if ((cp = kgetenv("boot.netif.name")) != NULL) {
 397                 ifnet_lock();
 398                 ifp = ifunit(cp);
 399                 if (ifp) {
 400                         strlcpy(nd->myif.ifra_name, ifp->if_xname,
 401                             sizeof(nd->myif.ifra_name));
 402                         ifnet_unlock();
 403                         goto match_done;
 404                 }
 405                 ifnet_unlock();
 406                 kprintf("PXE: cannot find interface %s\n", cp);
 407                 return;
 408         }
 409
 410         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 411                 kprintf("PXE: no hardware address\n");
 412                 return;
 413         }
 414         ifa = NULL;
 415         ifnet_lock();
 416         TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
 417                 struct ifaddr_container *ifac;
 418
 419                 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
 420                         ifa = ifac->ifa;
 421
 422                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 423                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 424                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 425                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 426                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 427                                           ourdl.sdl_data + ourdl.sdl_nlen,
 428                                           sdl->sdl_alen)) {
 429                                         strlcpy(nd->myif.ifra_name,
 430                                             ifp->if_xname,
 431                                             sizeof(nd->myif.ifra_name));
 432                                         ifnet_unlock();
 433                                         goto match_done;
 434                                 }
 435                         }
 436                 }
 437         }
 438         ifnet_unlock();
 439         kprintf("PXE: no interface\n");
 440         return; /* no matching interface */
 441 match_done:
 442         /* set up gateway */
 443         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 444
 445         /* XXX set up swap? */
 446
 447         /* set up root mount */
 448         nd->root_args.rsize = nfsroot_iosize;
 449         nd->root_args.wsize = nfsroot_iosize;
 450         nd->root_args.sotype = SOCK_STREAM;
 451         nd->root_args.readahead = nfsroot_rahead;
 452         nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT |
 453                               NFSMNT_READAHEAD;
 454         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 455                 kprintf("PXE: no server\n");
 456                 return;
 457         }
 458         nd->root_saddr.sin_port = htons(NFS_PORT);
 459
 460         /*
 461          * A tftp-only loader may pass NFS path information without a
 462          * root handle.  Generate a warning but continue configuring.
 463          */
 464         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 465                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 466         }
 467         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 468                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 469
 470         nfs_diskless_valid = 1;
 471 }
 472
 473 #endif
 474 #endif