ofnet.c revision 1.29
1 /* $NetBSD: ofnet.c,v 1.29 2002/10/02 16:34:34 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 1.29 2002/10/02 16:34:34 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 CFATTACH_DECL(ofnet, sizeof(struct ofnet_softc), 91 ofnet_match, ofnet_attach, NULL, NULL); 92 93 static void ofnet_read (struct ofnet_softc *); 94 static void ofnet_timer (void *); 95 static void ofnet_init (struct ofnet_softc *); 96 static void ofnet_stop (struct ofnet_softc *); 97 98 static void ofnet_start (struct ifnet *); 99 static int ofnet_ioctl (struct ifnet *, u_long, caddr_t); 100 static void ofnet_watchdog (struct ifnet *); 101 102 static int 103 ofnet_match(struct device *parent, struct cfdata *match, void *aux) 104 { 105 struct ofbus_attach_args *oba = aux; 106 char type[32]; 107 int l; 108 109 #if NIPKDB_OFN > 0 110 if (!parent) 111 return ipkdbprobe(match, aux); 112 #endif 113 if (strcmp(oba->oba_busname, "ofw")) 114 return (0); 115 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 116 sizeof type - 1)) < 0) 117 return 0; 118 if (l >= sizeof type) 119 return 0; 120 type[l] = 0; 121 if (strcmp(type, "network")) 122 return 0; 123 return 1; 124 } 125 126 static void 127 ofnet_attach(struct device *parent, struct device *self, 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 callout_init(&of->sc_callout); 156 157 bcopy(of->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 158 ifp->if_softc = of; 159 ifp->if_start = ofnet_start; 160 ifp->if_ioctl = ofnet_ioctl; 161 ifp->if_watchdog = ofnet_watchdog; 162 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 163 IFQ_SET_READY(&ifp->if_snd); 164 165 if_attach(ifp); 166 ether_ifattach(ifp, myaddr); 167 } 168 169 static char buf[ETHERMTU + sizeof(struct ether_header)]; 170 171 static void 172 ofnet_read(struct ofnet_softc *of) 173 { 174 struct ifnet *ifp = &of->sc_ethercom.ec_if; 175 struct mbuf *m, **mp, *head; 176 int s, l, len; 177 char *bufp; 178 179 s = splnet(); 180 #if NIPKDB_OFN > 0 181 ipkdbrint(kifp, ifp); 182 #endif 183 for (;;) { 184 if ((len = OF_read(of->sc_ihandle, buf, sizeof buf)) < 0) { 185 if (len == -2 || len == 0) 186 break; 187 ifp->if_ierrors++; 188 continue; 189 } 190 if (len < sizeof(struct ether_header)) { 191 ifp->if_ierrors++; 192 continue; 193 } 194 bufp = buf; 195 196 /* Allocate a header mbuf */ 197 MGETHDR(m, M_DONTWAIT, MT_DATA); 198 if (m == 0) { 199 ifp->if_ierrors++; 200 continue; 201 } 202 m->m_pkthdr.rcvif = ifp; 203 m->m_pkthdr.len = len; 204 205 /* 206 * We don't know if the interface included the FCS 207 * or not. For now, assume that it did if we got 208 * a packet length that looks like it could include 209 * the FCS. 210 * 211 * XXX Yuck. 212 */ 213 214 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) 215 m->m_flags |= M_HASFCS; 216 217 l = MHLEN; 218 head = 0; 219 mp = &head; 220 221 while (len > 0) { 222 if (head) { 223 MGET(m, M_DONTWAIT, MT_DATA); 224 if (m == 0) { 225 ifp->if_ierrors++; 226 m_freem(head); 227 head = 0; 228 break; 229 } 230 l = MLEN; 231 } 232 if (len >= MINCLSIZE) { 233 MCLGET(m, M_DONTWAIT); 234 if ((m->m_flags & M_EXT) == 0) { 235 ifp->if_ierrors++; 236 m_free(m); 237 m_freem(head); 238 head = 0; 239 break; 240 } 241 l = MCLBYTES; 242 } 243 244 /* 245 * Make sure the data after the Ethernet header 246 * is aligned. 247 * 248 * XXX Assumes the device is an ethernet, but 249 * XXX then so does other code in this driver. 250 */ 251 if (head == NULL) { 252 caddr_t newdata = (caddr_t)ALIGN(m->m_data + 253 sizeof(struct ether_header)) - 254 sizeof(struct ether_header); 255 l -= newdata - m->m_data; 256 m->m_data = newdata; 257 } 258 259 m->m_len = l = min(len, l); 260 bcopy(bufp, mtod(m, char *), l); 261 bufp += l; 262 len -= l; 263 *mp = m; 264 mp = &m->m_next; 265 } 266 if (head == 0) 267 continue; 268 269 #if NBPFILTER > 0 270 if (ifp->if_bpf) 271 bpf_mtap(ifp->if_bpf, m); 272 #endif 273 ifp->if_ipackets++; 274 (*ifp->if_input)(ifp, head); 275 } 276 splx(s); 277 } 278 279 static void 280 ofnet_timer(arg) 281 void *arg; 282 { 283 struct ofnet_softc *of = arg; 284 285 ofnet_read(of); 286 callout_reset(&of->sc_callout, 1, ofnet_timer, of); 287 } 288 289 static void 290 ofnet_init(struct ofnet_softc *of) 291 { 292 struct ifnet *ifp = &of->sc_ethercom.ec_if; 293 294 if (ifp->if_flags & IFF_RUNNING) 295 return; 296 297 ifp->if_flags |= IFF_RUNNING; 298 /* Start reading from interface */ 299 ofnet_timer(of); 300 /* Attempt to start output */ 301 ofnet_start(ifp); 302 } 303 304 static void 305 ofnet_stop(struct ofnet_softc *of) 306 { 307 callout_stop(&of->sc_callout); 308 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 309 } 310 311 static void 312 ofnet_start(struct ifnet *ifp) 313 { 314 struct ofnet_softc *of = ifp->if_softc; 315 struct mbuf *m, *m0; 316 char *bufp; 317 int len; 318 319 if (!(ifp->if_flags & IFF_RUNNING)) 320 return; 321 322 for (;;) { 323 /* First try reading any packets */ 324 ofnet_read(of); 325 326 /* Now get the first packet on the queue */ 327 IFQ_DEQUEUE(&ifp->if_snd, m0); 328 if (!m0) 329 return; 330 331 if (!(m0->m_flags & M_PKTHDR)) 332 panic("ofnet_start: no header mbuf"); 333 len = m0->m_pkthdr.len; 334 335 #if NBPFILTER > 0 336 if (ifp->if_bpf) 337 bpf_mtap(ifp->if_bpf, m0); 338 #endif 339 340 if (len > ETHERMTU + sizeof(struct ether_header)) { 341 /* packet too large, toss it */ 342 ifp->if_oerrors++; 343 m_freem(m0); 344 continue; 345 } 346 347 for (bufp = buf; (m = m0) != NULL;) { 348 bcopy(mtod(m, char *), bufp, m->m_len); 349 bufp += m->m_len; 350 MFREE(m, m0); 351 } 352 353 /* 354 * We don't know if the interface will auto-pad for 355 * us, so make sure it's at least as large as a 356 * minimum size Ethernet packet. 357 */ 358 359 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 360 len = ETHER_MIN_LEN - ETHER_CRC_LEN; 361 else 362 len = bufp - buf; 363 364 if (OF_write(of->sc_ihandle, buf, len) != len) 365 ifp->if_oerrors++; 366 else 367 ifp->if_opackets++; 368 } 369 } 370 371 static int 372 ofnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 373 { 374 struct ofnet_softc *of = ifp->if_softc; 375 struct ifaddr *ifa = (struct ifaddr *)data; 376 /* struct ifreq *ifr = (struct ifreq *)data; */ 377 int error = 0; 378 379 switch (cmd) { 380 case SIOCSIFADDR: 381 ifp->if_flags |= IFF_UP; 382 383 switch (ifa->ifa_addr->sa_family) { 384 #ifdef INET 385 case AF_INET: 386 arp_ifinit(ifp, ifa); 387 break; 388 #endif 389 default: 390 break; 391 } 392 ofnet_init(of); 393 break; 394 case SIOCSIFFLAGS: 395 if ((ifp->if_flags & IFF_UP) == 0 && 396 (ifp->if_flags & IFF_RUNNING) != 0) { 397 /* If interface is down, but running, stop it. */ 398 ofnet_stop(of); 399 } else if ((ifp->if_flags & IFF_UP) != 0 && 400 (ifp->if_flags & IFF_RUNNING) == 0) { 401 /* If interface is up, but not running, start it. */ 402 ofnet_init(of); 403 } else { 404 /* Other flags are ignored. */ 405 } 406 break; 407 default: 408 error = EINVAL; 409 break; 410 } 411 return error; 412 } 413 414 static void 415 ofnet_watchdog(struct ifnet *ifp) 416 { 417 struct ofnet_softc *of = ifp->if_softc; 418 419 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 420 ifp->if_oerrors++; 421 ofnet_stop(of); 422 ofnet_init(of); 423 } 424 425 #if NIPKDB_OFN > 0 426 static void 427 ipkdbofstart(struct ipkdb_if *kip) 428 { 429 int unit = kip->unit - 1; 430 431 if (ipkdb_of) 432 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 433 } 434 435 static void 436 ipkdbofleave(struct ipkdb_if *kip) 437 { 438 } 439 440 static int 441 ipkdbofrcv(struct ipkdb_if *kip, u_char *buf, int poll) 442 { 443 int l; 444 445 do { 446 l = OF_read(kip->port, buf, ETHERMTU); 447 if (l < 0) 448 l = 0; 449 } while (!poll && !l); 450 return l; 451 } 452 453 static void 454 ipkdbofsend(struct ipkdb_if *kip, u_char *buf, int l) 455 { 456 OF_write(kip->port, buf, l); 457 } 458 459 static int 460 ipkdbprobe(struct cfdata *match, void *aux) 461 { 462 struct ipkdb_if *kip = aux; 463 static char name[256]; 464 int len; 465 int phandle; 466 467 kip->unit = match->cf_unit + 1; 468 469 if (!(kip->port = OF_open("net"))) 470 return -1; 471 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 472 len >= sizeof name) 473 return -1; 474 name[len] = 0; 475 if ((phandle = OF_instance_to_package(kip->port)) == -1) 476 return -1; 477 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 478 sizeof kip->myenetaddr) < 0) 479 return -1; 480 481 kip->flags |= IPKDB_MYHW; 482 kip->name = name; 483 kip->start = ipkdbofstart; 484 kip->leave = ipkdbofleave; 485 kip->receive = ipkdbofrcv; 486 kip->send = ipkdbofsend; 487 488 kifp = kip; 489 490 return 0; 491 } 492 #endif 493
Indexes created Tue Sep 30 17:09:57 GMT 2025