ofnet.c revision 1.25
1 /* $NetBSD: ofnet.c,v 1.25 2002/09/18 01:47:08 chs 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 1.25 2002/09/18 01:47:08 chs 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 struct cfattach ipkdb_ofn_ca = { 71 0, ipkdb_probe, ipkdb_attach 72 }; 73 74 static struct ipkdb_if *kifp; 75 static struct ofnet_softc *ipkdb_of; 76 77 static int ipkdbprobe (struct cfdata *, void *); 78 #endif 79 80 struct ofnet_softc { 81 struct device sc_dev; 82 int sc_phandle; 83 int sc_ihandle; 84 struct ethercom sc_ethercom; 85 struct callout sc_callout; 86 }; 87 88 static int ofnet_match (struct device *, struct cfdata *, void *); 89 static void ofnet_attach (struct device *, struct device *, void *); 90 91 struct cfattach ofnet_ca = { 92 sizeof(struct ofnet_softc), ofnet_match, ofnet_attach 93 }; 94 95 static void ofnet_read (struct ofnet_softc *); 96 static void ofnet_timer (void *); 97 static void ofnet_init (struct ofnet_softc *); 98 static void ofnet_stop (struct ofnet_softc *); 99 100 static void ofnet_start (struct ifnet *); 101 static int ofnet_ioctl (struct ifnet *, u_long, caddr_t); 102 static void ofnet_watchdog (struct ifnet *); 103 104 static int 105 ofnet_match(struct device *parent, struct cfdata *match, void *aux) 106 { 107 struct ofbus_attach_args *oba = aux; 108 char type[32]; 109 int l; 110 111 #if NIPKDB_OFN > 0 112 if (!parent) 113 return ipkdbprobe(match, aux); 114 #endif 115 if (strcmp(oba->oba_busname, "ofw")) 116 return (0); 117 if ((l = OF_getprop(oba->oba_phandle, "device_type", type, 118 sizeof type - 1)) < 0) 119 return 0; 120 if (l >= sizeof type) 121 return 0; 122 type[l] = 0; 123 if (strcmp(type, "network")) 124 return 0; 125 return 1; 126 } 127 128 static void 129 ofnet_attach(struct device *parent, struct device *self, void *aux) 130 { 131 struct ofnet_softc *of = (void *)self; 132 struct ifnet *ifp = &of->sc_ethercom.ec_if; 133 struct ofbus_attach_args *oba = aux; 134 char path[256]; 135 int l; 136 u_int8_t myaddr[ETHER_ADDR_LEN]; 137 138 of->sc_phandle = oba->oba_phandle; 139 #if NIPKDB_OFN > 0 140 if (kifp && 141 kifp->unit - 1 == of->sc_dev.dv_unit && 142 OF_instance_to_package(kifp->port) == oba->oba_phandle) { 143 ipkdb_of = of; 144 of->sc_ihandle = kifp->port; 145 } else 146 #endif 147 if ((l = OF_package_to_path(oba->oba_phandle, path, 148 sizeof path - 1)) < 0 || 149 l >= sizeof path || 150 (path[l] = 0, !(of->sc_ihandle = OF_open(path)))) 151 panic("ofnet_attach: unable to open"); 152 if (OF_getprop(oba->oba_phandle, "mac-address", myaddr, 153 sizeof myaddr) < 0) 154 panic("ofnet_attach: no mac-address"); 155 printf(": address %s\n", ether_sprintf(myaddr)); 156 157 callout_init(&of->sc_callout); 158 159 bcopy(of->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 160 ifp->if_softc = of; 161 ifp->if_start = ofnet_start; 162 ifp->if_ioctl = ofnet_ioctl; 163 ifp->if_watchdog = ofnet_watchdog; 164 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS; 165 IFQ_SET_READY(&ifp->if_snd); 166 167 if_attach(ifp); 168 ether_ifattach(ifp, myaddr); 169 } 170 171 static char buf[ETHERMTU + sizeof(struct ether_header)]; 172 173 static void 174 ofnet_read(struct ofnet_softc *of) 175 { 176 struct ifnet *ifp = &of->sc_ethercom.ec_if; 177 struct mbuf *m, **mp, *head; 178 int s, l, len; 179 char *bufp; 180 181 s = splnet(); 182 #if NIPKDB_OFN > 0 183 ipkdbrint(kifp, ifp); 184 #endif 185 for (;;) { 186 if ((len = OF_read(of->sc_ihandle, buf, sizeof buf)) < 0) { 187 if (len == -2 || len == 0) 188 break; 189 ifp->if_ierrors++; 190 continue; 191 } 192 if (len < sizeof(struct ether_header)) { 193 ifp->if_ierrors++; 194 continue; 195 } 196 bufp = buf; 197 198 /* Allocate a header mbuf */ 199 MGETHDR(m, M_DONTWAIT, MT_DATA); 200 if (m == 0) { 201 ifp->if_ierrors++; 202 continue; 203 } 204 m->m_pkthdr.rcvif = ifp; 205 m->m_pkthdr.len = len; 206 207 /* 208 * We don't know if the interface included the FCS 209 * or not. For now, assume that it did if we got 210 * a packet length that looks like it could include 211 * the FCS. 212 * 213 * XXX Yuck. 214 */ 215 216 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) 217 m->m_flags |= M_HASFCS; 218 219 l = MHLEN; 220 head = 0; 221 mp = &head; 222 223 while (len > 0) { 224 if (head) { 225 MGET(m, M_DONTWAIT, MT_DATA); 226 if (m == 0) { 227 ifp->if_ierrors++; 228 m_freem(head); 229 head = 0; 230 break; 231 } 232 l = MLEN; 233 } 234 if (len >= MINCLSIZE) { 235 MCLGET(m, M_DONTWAIT); 236 if ((m->m_flags & M_EXT) == 0) { 237 ifp->if_ierrors++; 238 m_free(m); 239 m_freem(head); 240 head = 0; 241 break; 242 } 243 l = MCLBYTES; 244 } 245 246 /* 247 * Make sure the data after the Ethernet header 248 * is aligned. 249 * 250 * XXX Assumes the device is an ethernet, but 251 * XXX then so does other code in this driver. 252 */ 253 if (head == NULL) { 254 caddr_t newdata = (caddr_t)ALIGN(m->m_data + 255 sizeof(struct ether_header)) - 256 sizeof(struct ether_header); 257 l -= newdata - m->m_data; 258 m->m_data = newdata; 259 } 260 261 m->m_len = l = min(len, l); 262 bcopy(bufp, mtod(m, char *), l); 263 bufp += l; 264 len -= l; 265 *mp = m; 266 mp = &m->m_next; 267 } 268 if (head == 0) 269 continue; 270 271 #if NBPFILTER > 0 272 if (ifp->if_bpf) 273 bpf_mtap(ifp->if_bpf, m); 274 #endif 275 ifp->if_ipackets++; 276 (*ifp->if_input)(ifp, head); 277 } 278 splx(s); 279 } 280 281 static void 282 ofnet_timer(arg) 283 void *arg; 284 { 285 struct ofnet_softc *of = arg; 286 287 ofnet_read(of); 288 callout_reset(&of->sc_callout, 1, ofnet_timer, of); 289 } 290 291 static void 292 ofnet_init(struct ofnet_softc *of) 293 { 294 struct ifnet *ifp = &of->sc_ethercom.ec_if; 295 296 if (ifp->if_flags & IFF_RUNNING) 297 return; 298 299 ifp->if_flags |= IFF_RUNNING; 300 /* Start reading from interface */ 301 ofnet_timer(of); 302 /* Attempt to start output */ 303 ofnet_start(ifp); 304 } 305 306 static void 307 ofnet_stop(struct ofnet_softc *of) 308 { 309 callout_stop(&of->sc_callout); 310 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 311 } 312 313 static void 314 ofnet_start(struct ifnet *ifp) 315 { 316 struct ofnet_softc *of = ifp->if_softc; 317 struct mbuf *m, *m0; 318 char *bufp; 319 int len; 320 321 if (!(ifp->if_flags & IFF_RUNNING)) 322 return; 323 324 for (;;) { 325 /* First try reading any packets */ 326 ofnet_read(of); 327 328 /* Now get the first packet on the queue */ 329 IFQ_DEQUEUE(&ifp->if_snd, m0); 330 if (!m0) 331 return; 332 333 if (!(m0->m_flags & M_PKTHDR)) 334 panic("ofnet_start: no header mbuf"); 335 len = m0->m_pkthdr.len; 336 337 #if NBPFILTER > 0 338 if (ifp->if_bpf) 339 bpf_mtap(ifp->if_bpf, m0); 340 #endif 341 342 if (len > ETHERMTU + sizeof(struct ether_header)) { 343 /* packet too large, toss it */ 344 ifp->if_oerrors++; 345 m_freem(m0); 346 continue; 347 } 348 349 for (bufp = buf; (m = m0) != NULL;) { 350 bcopy(mtod(m, char *), bufp, m->m_len); 351 bufp += m->m_len; 352 MFREE(m, m0); 353 } 354 355 /* 356 * We don't know if the interface will auto-pad for 357 * us, so make sure it's at least as large as a 358 * minimum size Ethernet packet. 359 */ 360 361 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 362 len = ETHER_MIN_LEN - ETHER_CRC_LEN; 363 else 364 len = bufp - buf; 365 366 if (OF_write(of->sc_ihandle, buf, len) != len) 367 ifp->if_oerrors++; 368 else 369 ifp->if_opackets++; 370 } 371 } 372 373 static int 374 ofnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 375 { 376 struct ofnet_softc *of = ifp->if_softc; 377 struct ifaddr *ifa = (struct ifaddr *)data; 378 /* struct ifreq *ifr = (struct ifreq *)data; */ 379 int error = 0; 380 381 switch (cmd) { 382 case SIOCSIFADDR: 383 ifp->if_flags |= IFF_UP; 384 385 switch (ifa->ifa_addr->sa_family) { 386 #ifdef INET 387 case AF_INET: 388 arp_ifinit(ifp, ifa); 389 break; 390 #endif 391 default: 392 break; 393 } 394 ofnet_init(of); 395 break; 396 case SIOCSIFFLAGS: 397 if ((ifp->if_flags & IFF_UP) == 0 && 398 (ifp->if_flags & IFF_RUNNING) != 0) { 399 /* If interface is down, but running, stop it. */ 400 ofnet_stop(of); 401 } else if ((ifp->if_flags & IFF_UP) != 0 && 402 (ifp->if_flags & IFF_RUNNING) == 0) { 403 /* If interface is up, but not running, start it. */ 404 ofnet_init(of); 405 } else { 406 /* Other flags are ignored. */ 407 } 408 break; 409 default: 410 error = EINVAL; 411 break; 412 } 413 return error; 414 } 415 416 static void 417 ofnet_watchdog(struct ifnet *ifp) 418 { 419 struct ofnet_softc *of = ifp->if_softc; 420 421 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 422 ifp->if_oerrors++; 423 ofnet_stop(of); 424 ofnet_init(of); 425 } 426 427 #if NIPKDB_OFN > 0 428 static void 429 ipkdbofstart(struct ipkdb_if *kip) 430 { 431 int unit = kip->unit - 1; 432 433 if (ipkdb_of) 434 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 435 } 436 437 static void 438 ipkdbofleave(struct ipkdb_if *kip) 439 { 440 } 441 442 static int 443 ipkdbofrcv(struct ipkdb_if *kip, u_char *buf, int poll) 444 { 445 int l; 446 447 do { 448 l = OF_read(kip->port, buf, ETHERMTU); 449 if (l < 0) 450 l = 0; 451 } while (!poll && !l); 452 return l; 453 } 454 455 static void 456 ipkdbofsend(struct ipkdb_if *kip, u_char *buf, int l) 457 { 458 OF_write(kip->port, buf, l); 459 } 460 461 static int 462 ipkdbprobe(struct cfdata *match, void *aux) 463 { 464 struct ipkdb_if *kip = aux; 465 static char name[256]; 466 int len; 467 int phandle; 468 469 kip->unit = match->cf_unit + 1; 470 471 if (!(kip->port = OF_open("net"))) 472 return -1; 473 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 474 len >= sizeof name) 475 return -1; 476 name[len] = 0; 477 if ((phandle = OF_instance_to_package(kip->port)) == -1) 478 return -1; 479 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 480 sizeof kip->myenetaddr) < 0) 481 return -1; 482 483 kip->flags |= IPKDB_MYHW; 484 kip->name = name; 485 kip->start = ipkdbofstart; 486 kip->leave = ipkdbofleave; 487 kip->receive = ipkdbofrcv; 488 kip->send = ipkdbofsend; 489 490 kifp = kip; 491 492 return 0; 493 } 494 #endif 495
Indexes created Tue Sep 30 20:09:53 GMT 2025