ofnet.c revision 1.22
1 /* $NetBSD: ofnet.c,v 1.22 2001/10/20 08:19:47 billc 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/callout.h> 40 #include <sys/device.h> 41 #include <sys/disk.h> 42 #include <sys/ioctl.h> 43 #include <sys/mbuf.h> 44 #include <sys/socket.h> 45 #include <sys/syslog.h> 46 47 #include <net/if.h> 48 #include <net/if_ether.h> 49 50 #ifdef INET 51 #include <netinet/in.h> 52 #include <netinet/if_inarp.h> 53 #endif 54 55 #if NBPFILTER > 0 56 #include <net/bpf.h> 57 #include <net/bpfdesc.h> 58 #endif 59 60 #include <dev/ofw/openfirm.h> 61 62 #if NIPKDB_OFN > 0 63 #include <ipkdb/ipkdb.h> 64 #include <machine/ipkdb.h> 65 66 struct cfattach ipkdb_ofn_ca = { 67 0, ipkdb_probe, ipkdb_attach 68 }; 69 70 static struct ipkdb_if *kifp; 71 static struct ofnet_softc *ipkdb_of; 72 73 static int ipkdbprobe (struct cfdata *, void *); 74 #endif 75 76 struct ofnet_softc { 77 struct device sc_dev; 78 int sc_phandle; 79 int sc_ihandle; 80 struct ethercom sc_ethercom; 81 struct callout sc_callout; 82 }; 83 84 static int ofnet_match (struct device *, struct cfdata *, void *); 85 static void ofnet_attach (struct device *, struct device *, void *); 86 87 struct cfattach ofnet_ca = { 88 sizeof(struct ofnet_softc), ofnet_match, ofnet_attach 89 }; 90 91 static void ofnet_read (struct ofnet_softc *); 92 static void ofnet_timer (void *); 93 static void ofnet_init (struct ofnet_softc *); 94 static void ofnet_stop (struct ofnet_softc *); 95 96 static void ofnet_start (struct ifnet *); 97 static int ofnet_ioctl (struct ifnet *, u_long, caddr_t); 98 static void ofnet_watchdog (struct ifnet *); 99 100 static int 101 ofnet_match(struct device *parent, struct cfdata *match, 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(struct device *parent, struct device *self, void *aux) 126 { 127 struct ofnet_softc *of = (void *)self; 128 struct ifnet *ifp = &of->sc_ethercom.ec_if; 129 struct ofbus_attach_args *oba = aux; 130 char path[256]; 131 int l; 132 u_int8_t myaddr[ETHER_ADDR_LEN]; 133 134 of->sc_phandle = oba->oba_phandle; 135 #if NIPKDB_OFN > 0 136 if (kifp && 137 kifp->unit - 1 == of->sc_dev.dv_unit && 138 OF_instance_to_package(kifp->port) == oba->oba_phandle) { 139 ipkdb_of = of; 140 of->sc_ihandle = kifp->port; 141 } else 142 #endif 143 if ((l = OF_package_to_path(oba->oba_phandle, path, 144 sizeof path - 1)) < 0 || 145 l >= sizeof path || 146 (path[l] = 0, !(of->sc_ihandle = OF_open(path)))) 147 panic("ofnet_attach: unable to open"); 148 if (OF_getprop(oba->oba_phandle, "mac-address", myaddr, 149 sizeof myaddr) < 0) 150 panic("ofnet_attach: no mac-address"); 151 printf(": address %s\n", ether_sprintf(myaddr)); 152 153 callout_init(&of->sc_callout); 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 #ifdef __BROKEN_DK_ESTABLISH 166 dk_establish(0, self); /* XXX */ 167 #endif 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 l, len; 178 char *bufp; 179 180 #if NIPKDB_OFN > 0 181 ipkdbrint(kifp, ifp); 182 #endif 183 while (1) { 184 if ((len = OF_read(of->sc_ihandle, buf, sizeof buf)) < 0) { 185 if (len == -2 || len == 0) 186 return; 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 } 277 278 static void 279 ofnet_timer(arg) 280 void *arg; 281 { 282 struct ofnet_softc *of = arg; 283 284 ofnet_read(of); 285 callout_reset(&of->sc_callout, 1, ofnet_timer, of); 286 } 287 288 static void 289 ofnet_init(struct ofnet_softc *of) 290 { 291 struct ifnet *ifp = &of->sc_ethercom.ec_if; 292 293 if (ifp->if_flags & IFF_RUNNING) 294 return; 295 296 ifp->if_flags |= IFF_RUNNING; 297 /* Start reading from interface */ 298 ofnet_timer(of); 299 /* Attempt to start output */ 300 ofnet_start(ifp); 301 } 302 303 static void 304 ofnet_stop(struct ofnet_softc *of) 305 { 306 callout_stop(&of->sc_callout); 307 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 308 } 309 310 static void 311 ofnet_start(struct ifnet *ifp) 312 { 313 struct ofnet_softc *of = ifp->if_softc; 314 struct mbuf *m, *m0; 315 char *bufp; 316 int len; 317 318 if (!(ifp->if_flags & IFF_RUNNING)) 319 return; 320 321 for (;;) { 322 /* First try reading any packets */ 323 ofnet_read(of); 324 325 /* Now get the first packet on the queue */ 326 IF_DEQUEUE(&ifp->if_snd, m0); 327 if (!m0) 328 return; 329 330 if (!(m0->m_flags & M_PKTHDR)) 331 panic("ofnet_start: no header mbuf"); 332 len = m0->m_pkthdr.len; 333 334 #if NBPFILTER > 0 335 if (ifp->if_bpf) 336 bpf_mtap(ifp->if_bpf, m0); 337 #endif 338 339 if (len > ETHERMTU + sizeof(struct ether_header)) { 340 /* packet too large, toss it */ 341 ifp->if_oerrors++; 342 m_freem(m0); 343 continue; 344 } 345 346 for (bufp = buf; (m = m0) != NULL;) { 347 bcopy(mtod(m, char *), bufp, m->m_len); 348 bufp += m->m_len; 349 MFREE(m, m0); 350 } 351 352 /* 353 * We don't know if the interface will auto-pad for 354 * us, so make sure it's at least as large as a 355 * minimum size Ethernet packet. 356 */ 357 358 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 359 len = ETHER_MIN_LEN - ETHER_CRC_LEN; 360 else 361 len = bufp - buf; 362 363 if (OF_write(of->sc_ihandle, buf, len) != len) 364 ifp->if_oerrors++; 365 else 366 ifp->if_opackets++; 367 } 368 } 369 370 static int 371 ofnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 372 { 373 struct ofnet_softc *of = ifp->if_softc; 374 struct ifaddr *ifa = (struct ifaddr *)data; 375 /* struct ifreq *ifr = (struct ifreq *)data; */ 376 int error = 0; 377 378 switch (cmd) { 379 case SIOCSIFADDR: 380 ifp->if_flags |= IFF_UP; 381 382 switch (ifa->ifa_addr->sa_family) { 383 #ifdef INET 384 case AF_INET: 385 arp_ifinit(ifp, ifa); 386 break; 387 #endif 388 default: 389 break; 390 } 391 ofnet_init(of); 392 break; 393 case SIOCSIFFLAGS: 394 if ((ifp->if_flags & IFF_UP) == 0 && 395 (ifp->if_flags & IFF_RUNNING) != 0) { 396 /* If interface is down, but running, stop it. */ 397 ofnet_stop(of); 398 } else if ((ifp->if_flags & IFF_UP) != 0 && 399 (ifp->if_flags & IFF_RUNNING) == 0) { 400 /* If interface is up, but not running, start it. */ 401 ofnet_init(of); 402 } else { 403 /* Other flags are ignored. */ 404 } 405 break; 406 default: 407 error = EINVAL; 408 break; 409 } 410 return error; 411 } 412 413 static void 414 ofnet_watchdog(struct ifnet *ifp) 415 { 416 struct ofnet_softc *of = ifp->if_softc; 417 418 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 419 ifp->if_oerrors++; 420 ofnet_stop(of); 421 ofnet_init(of); 422 } 423 424 #if NIPKDB_OFN > 0 425 static void 426 ipkdbofstart(struct ipkdb_if *kip) 427 { 428 int unit = kip->unit - 1; 429 430 if (ipkdb_of) 431 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 432 } 433 434 static void 435 ipkdbofleave(struct ipkdb_if *kip) 436 { 437 } 438 439 static int 440 ipkdbofrcv(struct ipkdb_if *kip, u_char *buf, int poll) 441 { 442 int l; 443 444 do { 445 l = OF_read(kip->port, buf, ETHERMTU); 446 if (l < 0) 447 l = 0; 448 } while (!poll && !l); 449 return l; 450 } 451 452 static void 453 ipkdbofsend(struct ipkdb_if *kip, u_char *buf, int l) 454 { 455 OF_write(kip->port, buf, l); 456 } 457 458 static int 459 ipkdbprobe(struct cfdata *match, void *aux) 460 { 461 struct ipkdb_if *kip = aux; 462 static char name[256]; 463 int len; 464 int phandle; 465 466 kip->unit = match->cf_unit + 1; 467 468 if (!(kip->port = OF_open("net"))) 469 return -1; 470 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 471 len >= sizeof name) 472 return -1; 473 name[len] = 0; 474 if ((phandle = OF_instance_to_package(kip->port)) == -1) 475 return -1; 476 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 477 sizeof kip->myenetaddr) < 0) 478 return -1; 479 480 kip->flags |= IPKDB_MYHW; 481 kip->name = name; 482 kip->start = ipkdbofstart; 483 kip->leave = ipkdbofleave; 484 kip->receive = ipkdbofrcv; 485 kip->send = ipkdbofsend; 486 487 kifp = kip; 488 489 return 0; 490 } 491 #endif 492
Indexes created Tue Sep 30 20:09:53 GMT 2025