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 396