ofnet.c revision 1.27
1 /* $NetBSD: ofnet.c,v 1.27 2002/09/30 22:10:08 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 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ofnet.c,v 1.27 2002/09/30 22:10:08 thorpej Exp $"); 36 37 #include "ofnet.h" 38 #include "opt_inet.h" 39 #include "bpfilter.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/callout.h> 44 #include <sys/device.h> 45 #include <sys/disk.h> 46 #include <sys/ioctl.h> 47 #include <sys/mbuf.h> 48 #include <sys/socket.h> 49 #include <sys/syslog.h> 50 51 #include <net/if.h> 52 #include <net/if_ether.h> 53 54 #ifdef INET 55 #include <netinet/in.h> 56 #include <netinet/if_inarp.h> 57 #endif 58 59 #if NBPFILTER > 0 60 #include <net/bpf.h> 61 #include <net/bpfdesc.h> 62 #endif 63 64 #include <dev/ofw/openfirm.h> 65 66 #if NIPKDB_OFN > 0 67 #include <ipkdb/ipkdb.h> 68 #include <machine/ipkdb.h> 69 70 CFATTACH_DECL(ipkdb_ofn, 0, 71 ipkdb_probe, ipkdb_attach, NULL, NULL) 72 73 static struct ipkdb_if *kifp; 74 static struct ofnet_softc *ipkdb_of; 75 76 static int ipkdbprobe (struct cfdata *, void *); 77 #endif 78 79 struct ofnet_softc { 80 struct device sc_dev; 81 int sc_phandle; 82 int sc_ihandle; 83 struct ethercom sc_ethercom; 84 struct callout sc_callout; 85 }; 86 87 static int ofnet_match (struct device *, struct cfdata *, void *); 88 static void ofnet_attach (struct device *, struct device *, void *); 89 90 const struct cfattach ofnet_ca = { 91 sizeof(struct ofnet_softc), ofnet_match, ofnet_attach 92 }; 93 94 static void ofnet_read (struct ofnet_softc *); 95 static void ofnet_timer (void *); 96 static void ofnet_init (struct ofnet_softc *); 97 static void ofnet_stop (struct ofnet_softc *); 98 99 static void ofnet_start (struct ifnet *); 100 static int ofnet_ioctl (struct ifnet *, u_long, caddr_t); 101 static void ofnet_watchdog (struct ifnet *); 102 103 static int 104 ofnet_match(struct device *parent, struct cfdata *match, void *aux) 105 { 106 struct ofbus_attach_args *oba = aux; 107 char type[32]; 108 int l; 109 110 #if NIPKDB_OFN > 0 111 if (!parent) 112 return ipkdbprobe(match, aux); 113 #endif 114 if (strcmp(oba->oba_busname, "ofw")) 115 return (0); 116 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 117 sizeof type - 1)) < 0) 118 return 0; 119 if (l >= sizeof type) 120 return 0; 121 type[l] = 0; 122 if (strcmp(type, "network")) 123 return 0; 124 return 1; 125 } 126 127 static void 128 ofnet_attach(struct device *parent, struct device *self, void *aux) 129 { 130 struct ofnet_softc *of = (void *)self; 131 struct ifnet *ifp = &of->sc_ethercom.ec_if; 132 struct ofbus_attach_args *oba = aux; 133 char path[256]; 134 int l; 135 u_int8_t myaddr[ETHER_ADDR_LEN]; 136 137 of->sc_phandle = oba->oba_phandle; 138 #if NIPKDB_OFN > 0 139 if (kifp && 140 kifp->unit - 1 == of->sc_dev.dv_unit && 141 OF_instance_to_package(kifp->port) == oba->oba_phandle) { 142 ipkdb_of = of; 143 of->sc_ihandle = kifp->port; 144 } else 145 #endif 146 if ((l = OF_package_to_path(oba->oba_phandle, path, 147 sizeof path - 1)) < 0 || 148 l >= sizeof path || 149 (path[l] = 0, !(of->sc_ihandle = OF_open(path)))) 150 panic("ofnet_attach: unable to open"); 151 if (OF_getprop(oba->oba_phandle, "mac-address", myaddr, 152 sizeof myaddr) < 0) 153 panic("ofnet_attach: no mac-address"); 154 printf(": address %s\n", ether_sprintf(myaddr)); 155 156 callout_init(&of->sc_callout); 157 158 bcopy(of->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 159 ifp->if_softc = of; 160 ifp->if_start = ofnet_start; 161 ifp->if_ioctl = ofnet_ioctl; 162 ifp->if_watchdog = ofnet_watchdog; 163 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 164 IFQ_SET_READY(&ifp->if_snd); 165 166 if_attach(ifp); 167 ether_ifattach(ifp, myaddr); 168 } 169 170 static char buf[ETHERMTU + sizeof(struct ether_header)]; 171 172 static void 173 ofnet_read(struct ofnet_softc *of) 174 { 175 struct ifnet *ifp = &of->sc_ethercom.ec_if; 176 struct mbuf *m, **mp, *head; 177 int s, l, len; 178 char *bufp; 179 180 s = splnet(); 181 #if NIPKDB_OFN > 0 182 ipkdbrint(kifp, ifp); 183 #endif 184 for (;;) { 185 if ((len = OF_read(of->sc_ihandle, buf, sizeof buf)) < 0) { 186 if (len == -2 || len == 0) 187 break; 188 ifp->if_ierrors++; 189 continue; 190 } 191 if (len < sizeof(struct ether_header)) { 192 ifp->if_ierrors++; 193 continue; 194 } 195 bufp = buf; 196 197 /* Allocate a header mbuf */ 198 MGETHDR(m, M_DONTWAIT, MT_DATA); 199 if (m == 0) { 200 ifp->if_ierrors++; 201 continue; 202 } 203 m->m_pkthdr.rcvif = ifp; 204 m->m_pkthdr.len = len; 205 206 /* 207 * We don't know if the interface included the FCS 208 * or not. For now, assume that it did if we got 209 * a packet length that looks like it could include 210 * the FCS. 211 * 212 * XXX Yuck. 213 */ 214 215 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) 216 m->m_flags |= M_HASFCS; 217 218 l = MHLEN; 219 head = 0; 220 mp = &head; 221 222 while (len > 0) { 223 if (head) { 224 MGET(m, M_DONTWAIT, MT_DATA); 225 if (m == 0) { 226 ifp->if_ierrors++; 227 m_freem(head); 228 head = 0; 229 break; 230 } 231 l = MLEN; 232 } 233 if (len >= MINCLSIZE) { 234 MCLGET(m, M_DONTWAIT); 235 if ((m->m_flags & M_EXT) == 0) { 236 ifp->if_ierrors++; 237 m_free(m); 238 m_freem(head); 239 head = 0; 240 break; 241 } 242 l = MCLBYTES; 243 } 244 245 /* 246 * Make sure the data after the Ethernet header 247 * is aligned. 248 * 249 * XXX Assumes the device is an ethernet, but 250 * XXX then so does other code in this driver. 251 */ 252 if (head == NULL) { 253 caddr_t newdata = (caddr_t)ALIGN(m->m_data + 254 sizeof(struct ether_header)) - 255 sizeof(struct ether_header); 256 l -= newdata - m->m_data; 257 m->m_data = newdata; 258 } 259 260 m->m_len = l = min(len, l); 261 bcopy(bufp, mtod(m, char *), l); 262 bufp += l; 263 len -= l; 264 *mp = m; 265 mp = &m->m_next; 266 } 267 if (head == 0) 268 continue; 269 270 #if NBPFILTER > 0 271 if (ifp->if_bpf) 272 bpf_mtap(ifp->if_bpf, m); 273 #endif 274 ifp->if_ipackets++; 275 (*ifp->if_input)(ifp, head); 276 } 277 splx(s); 278 } 279 280 static void 281 ofnet_timer(arg) 282 void *arg; 283 { 284 struct ofnet_softc *of = arg; 285 286 ofnet_read(of); 287 callout_reset(&of->sc_callout, 1, ofnet_timer, of); 288 } 289 290 static void 291 ofnet_init(struct ofnet_softc *of) 292 { 293 struct ifnet *ifp = &of->sc_ethercom.ec_if; 294 295 if (ifp->if_flags & IFF_RUNNING) 296 return; 297 298 ifp->if_flags |= IFF_RUNNING; 299 /* Start reading from interface */ 300 ofnet_timer(of); 301 /* Attempt to start output */ 302 ofnet_start(ifp); 303 } 304 305 static void 306 ofnet_stop(struct ofnet_softc *of) 307 { 308 callout_stop(&of->sc_callout); 309 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 310 } 311 312 static void 313 ofnet_start(struct ifnet *ifp) 314 { 315 struct ofnet_softc *of = ifp->if_softc; 316 struct mbuf *m, *m0; 317 char *bufp; 318 int len; 319 320 if (!(ifp->if_flags & IFF_RUNNING)) 321 return; 322 323 for (;;) { 324 /* First try reading any packets */ 325 ofnet_read(of); 326 327 /* Now get the first packet on the queue */ 328 IFQ_DEQUEUE(&ifp->if_snd, m0); 329 if (!m0) 330 return; 331 332 if (!(m0->m_flags & M_PKTHDR)) 333 panic("ofnet_start: no header mbuf"); 334 len = m0->m_pkthdr.len; 335 336 #if NBPFILTER > 0 337 if (ifp->if_bpf) 338 bpf_mtap(ifp->if_bpf, m0); 339 #endif 340 341 if (len > ETHERMTU + sizeof(struct ether_header)) { 342 /* packet too large, toss it */ 343 ifp->if_oerrors++; 344 m_freem(m0); 345 continue; 346 } 347 348 for (bufp = buf; (m = m0) != NULL;) { 349 bcopy(mtod(m, char *), bufp, m->m_len); 350 bufp += m->m_len; 351 MFREE(m, m0); 352 } 353 354 /* 355 * We don't know if the interface will auto-pad for 356 * us, so make sure it's at least as large as a 357 * minimum size Ethernet packet. 358 */ 359 360 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 361 len = ETHER_MIN_LEN - ETHER_CRC_LEN; 362 else 363 len = bufp - buf; 364 365 if (OF_write(of->sc_ihandle, buf, len) != len) 366 ifp->if_oerrors++; 367 else 368 ifp->if_opackets++; 369 } 370 } 371 372 static int 373 ofnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 374 { 375 struct ofnet_softc *of = ifp->if_softc; 376 struct ifaddr *ifa = (struct ifaddr *)data; 377 /* struct ifreq *ifr = (struct ifreq *)data; */ 378 int error = 0; 379 380 switch (cmd) { 381 case SIOCSIFADDR: 382 ifp->if_flags |= IFF_UP; 383 384 switch (ifa->ifa_addr->sa_family) { 385 #ifdef INET 386 case AF_INET: 387 arp_ifinit(ifp, ifa); 388 break; 389 #endif 390 default: 391 break; 392 } 393 ofnet_init(of); 394 break; 395 case SIOCSIFFLAGS: 396 if ((ifp->if_flags & IFF_UP) == 0 && 397 (ifp->if_flags & IFF_RUNNING) != 0) { 398 /* If interface is down, but running, stop it. */ 399 ofnet_stop(of); 400 } else if ((ifp->if_flags & IFF_UP) != 0 && 401 (ifp->if_flags & IFF_RUNNING) == 0) { 402 /* If interface is up, but not running, start it. */ 403 ofnet_init(of); 404 } else { 405 /* Other flags are ignored. */ 406 } 407 break; 408 default: 409 error = EINVAL; 410 break; 411 } 412 return error; 413 } 414 415 static void 416 ofnet_watchdog(struct ifnet *ifp) 417 { 418 struct ofnet_softc *of = ifp->if_softc; 419 420 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 421 ifp->if_oerrors++; 422 ofnet_stop(of); 423 ofnet_init(of); 424 } 425 426 #if NIPKDB_OFN > 0 427 static void 428 ipkdbofstart(struct ipkdb_if *kip) 429 { 430 int unit = kip->unit - 1; 431 432 if (ipkdb_of) 433 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 434 } 435 436 static void 437 ipkdbofleave(struct ipkdb_if *kip) 438 { 439 } 440 441 static int 442 ipkdbofrcv(struct ipkdb_if *kip, u_char *buf, int poll) 443 { 444 int l; 445 446 do { 447 l = OF_read(kip->port, buf, ETHERMTU); 448 if (l < 0) 449 l = 0; 450 } while (!poll && !l); 451 return l; 452 } 453 454 static void 455 ipkdbofsend(struct ipkdb_if *kip, u_char *buf, int l) 456 { 457 OF_write(kip->port, buf, l); 458 } 459 460 static int 461 ipkdbprobe(struct cfdata *match, void *aux) 462 { 463 struct ipkdb_if *kip = aux; 464 static char name[256]; 465 int len; 466 int phandle; 467 468 kip->unit = match->cf_unit + 1; 469 470 if (!(kip->port = OF_open("net"))) 471 return -1; 472 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 473 len >= sizeof name) 474 return -1; 475 name[len] = 0; 476 if ((phandle = OF_instance_to_package(kip->port)) == -1) 477 return -1; 478 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 479 sizeof kip->myenetaddr) < 0) 480 return -1; 481 482 kip->flags |= IPKDB_MYHW; 483 kip->name = name; 484 kip->start = ipkdbofstart; 485 kip->leave = ipkdbofleave; 486 kip->receive = ipkdbofrcv; 487 kip->send = ipkdbofsend; 488 489 kifp = kip; 490 491 return 0; 492 } 493 #endif 494
Indexes created Tue Sep 30 17:09:57 GMT 2025