ofnet.c revision 1.17
1 /* $NetBSD: ofnet.c,v 1.17 1999/05/18 23:52:57 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #include "ofnet.h" 34 #include "opt_inet.h" 35 #include "bpfilter.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/ioctl.h> 41 #include <sys/mbuf.h> 42 #include <sys/socket.h> 43 #include <sys/syslog.h> 44 45 #include <net/if.h> 46 #include <net/if_ether.h> 47 48 #ifdef INET 49 #include <netinet/in.h> 50 #include <netinet/if_inarp.h> 51 #endif 52 53 #if NBPFILTER > 0 54 #include <net/bpf.h> 55 #include <net/bpfdesc.h> 56 #endif 57 58 #include <dev/ofw/openfirm.h> 59 60 #if NIPKDB_OFN > 0 61 #include <ipkdb/ipkdb.h> 62 #include <machine/ipkdb.h> 63 64 struct cfattach ipkdb_ofn_ca = { 65 0, ipkdb_probe, ipkdb_attach 66 }; 67 68 static struct ipkdb_if *kifp; 69 static struct ofnet_softc *ipkdb_of; 70 71 static int ipkdbprobe __P((struct cfdata *, void *)); 72 #endif 73 74 struct ofnet_softc { 75 struct device sc_dev; 76 int sc_phandle; 77 int sc_ihandle; 78 struct ethercom sc_ethercom; 79 }; 80 81 static int ofnet_match __P((struct device *, struct cfdata *, void *)); 82 static void ofnet_attach __P((struct device *, struct device *, void *)); 83 84 struct cfattach ofnet_ca = { 85 sizeof(struct ofnet_softc), ofnet_match, ofnet_attach 86 }; 87 88 static void ofnet_read __P((struct ofnet_softc *)); 89 static void ofnet_timer __P((void *)); 90 static void ofnet_init __P((struct ofnet_softc *)); 91 static void ofnet_stop __P((struct ofnet_softc *)); 92 93 static void ofnet_start __P((struct ifnet *)); 94 static int ofnet_ioctl __P((struct ifnet *, u_long, caddr_t)); 95 static void ofnet_watchdog __P((struct ifnet *)); 96 97 static int 98 ofnet_match(parent, match, aux) 99 struct device *parent; 100 struct cfdata *match; 101 void *aux; 102 { 103 struct ofbus_attach_args *oba = aux; 104 char type[32]; 105 int l; 106 107 #if NIPKDB_OFN > 0 108 if (!parent) 109 return ipkdbprobe(match, aux); 110 #endif 111 if (strcmp(oba->oba_busname, "ofw")) 112 return (0); 113 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 114 sizeof type - 1)) < 0) 115 return 0; 116 if (l >= sizeof type) 117 return 0; 118 type[l] = 0; 119 if (strcmp(type, "network")) 120 return 0; 121 return 1; 122 } 123 124 static void 125 ofnet_attach(parent, self, aux) 126 struct device *parent, *self; 127 void *aux; 128 { 129 struct ofnet_softc *of = (void *)self; 130 struct ifnet *ifp = &of->sc_ethercom.ec_if; 131 struct ofbus_attach_args *oba = aux; 132 char path[256]; 133 int l; 134 u_int8_t myaddr[ETHER_ADDR_LEN]; 135 136 of->sc_phandle = oba->oba_phandle; 137 #if NIPKDB_OFN > 0 138 if (kifp && 139 kifp->unit - 1 == of->sc_dev.dv_unit && 140 OF_instance_to_package(kifp->port) == oba->oba_phandle) { 141 ipkdb_of = of; 142 of->sc_ihandle = kifp->port; 143 } else 144 #endif 145 if ((l = OF_package_to_path(oba->oba_phandle, path, 146 sizeof path - 1)) < 0 || 147 l >= sizeof path || 148 (path[l] = 0, !(of->sc_ihandle = OF_open(path)))) 149 panic("ofnet_attach: unable to open"); 150 if (OF_getprop(oba->oba_phandle, "mac-address", myaddr, 151 sizeof myaddr) < 0) 152 panic("ofnet_attach: no mac-address"); 153 printf(": address %s\n", ether_sprintf(myaddr)); 154 155 bcopy(of->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 156 ifp->if_softc = of; 157 ifp->if_start = ofnet_start; 158 ifp->if_ioctl = ofnet_ioctl; 159 ifp->if_watchdog = ofnet_watchdog; 160 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 161 162 if_attach(ifp); 163 ether_ifattach(ifp, myaddr); 164 165 #if NBPFILTER > 0 166 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 167 #endif 168 169 dk_establish(0, self); /* XXX */ 170 } 171 172 static char buf[ETHERMTU + sizeof(struct ether_header)]; 173 174 static void 175 ofnet_read(of) 176 struct ofnet_softc *of; 177 { 178 struct ifnet *ifp = &of->sc_ethercom.ec_if; 179 struct mbuf *m, **mp, *head; 180 int l, len; 181 char *bufp; 182 183 #if NIPKDB_OFN > 0 184 ipkdbrint(kifp, ifp); 185 #endif 186 while (1) { 187 if ((len = OF_read(of->sc_ihandle, buf, sizeof buf)) < 0) { 188 if (len == -2 || len == 0) 189 return; 190 ifp->if_ierrors++; 191 continue; 192 } 193 if (len < sizeof(struct ether_header)) { 194 ifp->if_ierrors++; 195 continue; 196 } 197 bufp = buf; 198 199 /* Allocate a header mbuf */ 200 MGETHDR(m, M_DONTWAIT, MT_DATA); 201 if (m == 0) { 202 ifp->if_ierrors++; 203 continue; 204 } 205 m->m_pkthdr.rcvif = ifp; 206 m->m_pkthdr.len = len; 207 l = MHLEN; 208 head = 0; 209 mp = &head; 210 211 while (len > 0) { 212 if (head) { 213 MGET(m, M_DONTWAIT, MT_DATA); 214 if (m == 0) { 215 ifp->if_ierrors++; 216 m_freem(head); 217 head = 0; 218 break; 219 } 220 l = MLEN; 221 } 222 if (len >= MINCLSIZE) { 223 MCLGET(m, M_DONTWAIT); 224 if ((m->m_flags & M_EXT) == 0) { 225 ifp->if_ierrors++; 226 m_free(m); 227 m_freem(head); 228 head = 0; 229 break; 230 } 231 l = MCLBYTES; 232 } 233 234 /* 235 * Make sure the data after the Ethernet header 236 * is aligned. 237 * 238 * XXX Assumes the device is an ethernet, but 239 * XXX then so does other code in this driver. 240 */ 241 if (head == NULL) { 242 caddr_t newdata = (caddr_t)ALIGN(m->m_data + 243 sizeof(struct ether_header)) - 244 sizeof(struct ether_header); 245 l -= newdata - m->m_data; 246 m->m_data = newdata; 247 } 248 249 m->m_len = l = min(len, l); 250 bcopy(bufp, mtod(m, char *), l); 251 bufp += l; 252 len -= l; 253 *mp = m; 254 mp = &m->m_next; 255 } 256 if (head == 0) 257 continue; 258 259 #if NBPFILTER > 0 260 if (ifp->if_bpf) 261 bpf_mtap(ifp->if_bpf, m); 262 #endif 263 ifp->if_ipackets++; 264 (*ifp->if_input)(ifp, head); 265 } 266 } 267 268 static void 269 ofnet_timer(arg) 270 void *arg; 271 { 272 struct ofnet_softc *of = arg; 273 274 ofnet_read(of); 275 timeout(ofnet_timer, of, 1); 276 } 277 278 static void 279 ofnet_init(of) 280 struct ofnet_softc *of; 281 { 282 struct ifnet *ifp = &of->sc_ethercom.ec_if; 283 284 if (ifp->if_flags & IFF_RUNNING) 285 return; 286 287 ifp->if_flags |= IFF_RUNNING; 288 /* Start reading from interface */ 289 ofnet_timer(of); 290 /* Attempt to start output */ 291 ofnet_start(ifp); 292 } 293 294 static void 295 ofnet_stop(of) 296 struct ofnet_softc *of; 297 { 298 untimeout(ofnet_timer, of); 299 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 300 } 301 302 static void 303 ofnet_start(ifp) 304 struct ifnet *ifp; 305 { 306 struct ofnet_softc *of = ifp->if_softc; 307 struct mbuf *m, *m0; 308 char *bufp; 309 int len; 310 311 if (!(ifp->if_flags & IFF_RUNNING)) 312 return; 313 314 for (;;) { 315 /* First try reading any packets */ 316 ofnet_read(of); 317 318 /* Now get the first packet on the queue */ 319 IF_DEQUEUE(&ifp->if_snd, m0); 320 if (!m0) 321 return; 322 323 if (!(m0->m_flags & M_PKTHDR)) 324 panic("ofnet_start: no header mbuf"); 325 len = m0->m_pkthdr.len; 326 327 #if NBPFILTER > 0 328 if (ifp->if_bpf) 329 bpf_mtap(ifp->if_bpf, m0); 330 #endif 331 332 if (len > ETHERMTU + sizeof(struct ether_header)) { 333 /* packet too large, toss it */ 334 ifp->if_oerrors++; 335 m_freem(m0); 336 continue; 337 } 338 339 for (bufp = buf; m = m0;) { 340 bcopy(mtod(m, char *), bufp, m->m_len); 341 bufp += m->m_len; 342 MFREE(m, m0); 343 } 344 if (OF_write(of->sc_ihandle, buf, bufp - buf) != bufp - buf) 345 ifp->if_oerrors++; 346 else 347 ifp->if_opackets++; 348 } 349 } 350 351 static int 352 ofnet_ioctl(ifp, cmd, data) 353 struct ifnet *ifp; 354 u_long cmd; 355 caddr_t data; 356 { 357 struct ofnet_softc *of = ifp->if_softc; 358 struct ifaddr *ifa = (struct ifaddr *)data; 359 struct ifreq *ifr = (struct ifreq *)data; 360 int error = 0; 361 362 switch (cmd) { 363 case SIOCSIFADDR: 364 ifp->if_flags |= IFF_UP; 365 366 switch (ifa->ifa_addr->sa_family) { 367 #ifdef INET 368 case AF_INET: 369 arp_ifinit(ifp, ifa); 370 break; 371 #endif 372 default: 373 break; 374 } 375 ofnet_init(of); 376 break; 377 case SIOCSIFFLAGS: 378 if ((ifp->if_flags & IFF_UP) == 0 && 379 (ifp->if_flags & IFF_RUNNING) != 0) { 380 /* If interface is down, but running, stop it. */ 381 ofnet_stop(of); 382 } else if ((ifp->if_flags & IFF_UP) != 0 && 383 (ifp->if_flags & IFF_RUNNING) == 0) { 384 /* If interface is up, but not running, start it. */ 385 ofnet_init(of); 386 } else { 387 /* Other flags are ignored. */ 388 } 389 break; 390 default: 391 error = EINVAL; 392 break; 393 } 394 return error; 395 } 396 397 static void 398 ofnet_watchdog(ifp) 399 struct ifnet *ifp; 400 { 401 struct ofnet_softc *of = ifp->if_softc; 402 403 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 404 ifp->if_oerrors++; 405 ofnet_stop(of); 406 ofnet_init(of); 407 } 408 409 #if NIPKDB_OFN > 0 410 static void 411 ipkdbofstart(kip) 412 struct ipkdb_if *kip; 413 { 414 int unit = kip->unit - 1; 415 416 if (ipkdb_of) 417 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 418 } 419 420 static void 421 ipkdbofleave(kip) 422 struct ipkdb_if *kip; 423 { 424 } 425 426 static int 427 ipkdbofrcv(kip, buf, poll) 428 struct ipkdb_if *kip; 429 u_char *buf; 430 int poll; 431 { 432 int l; 433 434 do { 435 l = OF_read(kip->port, buf, ETHERMTU); 436 if (l < 0) 437 l = 0; 438 } while (!poll && !l); 439 return l; 440 } 441 442 static void 443 ipkdbofsend(kip, buf, l) 444 struct ipkdb_if *kip; 445 u_char *buf; 446 int l; 447 { 448 OF_write(kip->port, buf, l); 449 } 450 451 static int 452 ipkdbprobe(match, aux) 453 struct cfdata *match; 454 void *aux; 455 { 456 struct ipkdb_if *kip = aux; 457 static char name[256]; 458 int len; 459 int phandle; 460 461 kip->unit = match->cf_unit + 1; 462 463 if (!(kip->port = OF_open("net"))) 464 return -1; 465 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 466 len >= sizeof name) 467 return -1; 468 name[len] = 0; 469 if ((phandle = OF_instance_to_package(kip->port)) == -1) 470 return -1; 471 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 472 sizeof kip->myenetaddr) < 0) 473 return -1; 474 475 kip->flags |= IPKDB_MYHW; 476 kip->name = name; 477 kip->start = ipkdbofstart; 478 kip->leave = ipkdbofleave; 479 kip->receive = ipkdbofrcv; 480 kip->send = ipkdbofsend; 481 482 kifp = kip; 483 484 return 0; 485 } 486 #endif 487
Indexes created Tue Sep 30 17:09:57 GMT 2025