1 /* $NetBSD: ofnet.c,v 1.31 2003/01/15 22:01:57 bouyer 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 1.31 2003/01/15 22:01:57 bouyer 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 len = OF_read(of->sc_ihandle, buf, sizeof buf); 185 if (len == -2 || len == 0) 186 break; 187 if (len < sizeof(struct ether_header)) { 188 ifp->if_ierrors++; 189 continue; 190 } 191 bufp = buf; 192 193 /* Allocate a header mbuf */ 194 MGETHDR(m, M_DONTWAIT, MT_DATA); 195 if (m == 0) { 196 ifp->if_ierrors++; 197 continue; 198 } 199 m->m_pkthdr.rcvif = ifp; 200 m->m_pkthdr.len = len; 201 202 /* 203 * We don't know if the interface included the FCS 204 * or not. For now, assume that it did if we got 205 * a packet length that looks like it could include 206 * the FCS. 207 * 208 * XXX Yuck. 209 */ 210 211 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN)) 212 m->m_flags |= M_HASFCS; 213 214 l = MHLEN; 215 head = 0; 216 mp = &head; 217 218 while (len > 0) { 219 if (head) { 220 MGET(m, M_DONTWAIT, MT_DATA); 221 if (m == 0) { 222 ifp->if_ierrors++; 223 m_freem(head); 224 head = 0; 225 break; 226 } 227 l = MLEN; 228 } 229 if (len >= MINCLSIZE) { 230 MCLGET(m, M_DONTWAIT); 231 if ((m->m_flags & M_EXT) == 0) { 232 ifp->if_ierrors++; 233 m_free(m); 234 m_freem(head); 235 head = 0; 236 break; 237 } 238 l = MCLBYTES; 239 } 240 241 /* 242 * Make sure the data after the Ethernet header 243 * is aligned. 244 * 245 * XXX Assumes the device is an ethernet, but 246 * XXX then so does other code in this driver. 247 */ 248 if (head == NULL) { 249 caddr_t newdata = (caddr_t)ALIGN(m->m_data + 250 sizeof(struct ether_header)) - 251 sizeof(struct ether_header); 252 l -= newdata - m->m_data; 253 m->m_data = newdata; 254 } 255 256 m->m_len = l = min(len, l); 257 bcopy(bufp, mtod(m, char *), l); 258 bufp += l; 259 len -= l; 260 *mp = m; 261 mp = &m->m_next; 262 } 263 if (head == 0) 264 continue; 265 266 #if NBPFILTER > 0 267 if (ifp->if_bpf) 268 bpf_mtap(ifp->if_bpf, m); 269 #endif 270 ifp->if_ipackets++; 271 (*ifp->if_input)(ifp, head); 272 } 273 splx(s); 274 } 275 276 static void 277 ofnet_timer(arg) 278 void *arg; 279 { 280 struct ofnet_softc *of = arg; 281 282 ofnet_read(of); 283 callout_reset(&of->sc_callout, 1, ofnet_timer, of); 284 } 285 286 static void 287 ofnet_init(struct ofnet_softc *of) 288 { 289 struct ifnet *ifp = &of->sc_ethercom.ec_if; 290 291 if (ifp->if_flags & IFF_RUNNING) 292 return; 293 294 ifp->if_flags |= IFF_RUNNING; 295 /* Start reading from interface */ 296 ofnet_timer(of); 297 /* Attempt to start output */ 298 ofnet_start(ifp); 299 } 300 301 static void 302 ofnet_stop(struct ofnet_softc *of) 303 { 304 callout_stop(&of->sc_callout); 305 of->sc_ethercom.ec_if.if_flags &= ~IFF_RUNNING; 306 } 307 308 static void 309 ofnet_start(struct ifnet *ifp) 310 { 311 struct ofnet_softc *of = ifp->if_softc; 312 struct mbuf *m, *m0; 313 char *bufp; 314 int len; 315 316 if (!(ifp->if_flags & IFF_RUNNING)) 317 return; 318 319 for (;;) { 320 /* First try reading any packets */ 321 ofnet_read(of); 322 323 /* Now get the first packet on the queue */ 324 IFQ_DEQUEUE(&ifp->if_snd, m0); 325 if (!m0) 326 return; 327 328 if (!(m0->m_flags & M_PKTHDR)) 329 panic("ofnet_start: no header mbuf"); 330 len = m0->m_pkthdr.len; 331 332 #if NBPFILTER > 0 333 if (ifp->if_bpf) 334 bpf_mtap(ifp->if_bpf, m0); 335 #endif 336 337 if (len > ETHERMTU + sizeof(struct ether_header)) { 338 /* packet too large, toss it */ 339 ifp->if_oerrors++; 340 m_freem(m0); 341 continue; 342 } 343 344 for (bufp = buf; (m = m0) != NULL;) { 345 bcopy(mtod(m, char *), bufp, m->m_len); 346 bufp += m->m_len; 347 MFREE(m, m0); 348 } 349 350 /* 351 * We don't know if the interface will auto-pad for 352 * us, so make sure it's at least as large as a 353 * minimum size Ethernet packet. 354 */ 355 356 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { 357 memset(bufp, 0, ETHER_MIN_LEN - ETHER_CRC_LEN - len); 358 bufp += ETHER_MIN_LEN - ETHER_CRC_LEN - len; 359 } else 360 len = bufp - buf; 361 362 if (OF_write(of->sc_ihandle, buf, len) != len) 363 ifp->if_oerrors++; 364 else 365 ifp->if_opackets++; 366 } 367 } 368 369 static int 370 ofnet_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 371 { 372 struct ofnet_softc *of = ifp->if_softc; 373 struct ifaddr *ifa = (struct ifaddr *)data; 374 /* struct ifreq *ifr = (struct ifreq *)data; */ 375 int error = 0; 376 377 switch (cmd) { 378 case SIOCSIFADDR: 379 ifp->if_flags |= IFF_UP; 380 381 switch (ifa->ifa_addr->sa_family) { 382 #ifdef INET 383 case AF_INET: 384 arp_ifinit(ifp, ifa); 385 break; 386 #endif 387 default: 388 break; 389 } 390 ofnet_init(of); 391 break; 392 case SIOCSIFFLAGS: 393 if ((ifp->if_flags & IFF_UP) == 0 && 394 (ifp->if_flags & IFF_RUNNING) != 0) { 395 /* If interface is down, but running, stop it. */ 396 ofnet_stop(of); 397 } else if ((ifp->if_flags & IFF_UP) != 0 && 398 (ifp->if_flags & IFF_RUNNING) == 0) { 399 /* If interface is up, but not running, start it. */ 400 ofnet_init(of); 401 } else { 402 /* Other flags are ignored. */ 403 } 404 break; 405 default: 406 error = EINVAL; 407 break; 408 } 409 return error; 410 } 411 412 static void 413 ofnet_watchdog(struct ifnet *ifp) 414 { 415 struct ofnet_softc *of = ifp->if_softc; 416 417 log(LOG_ERR, "%s: device timeout\n", of->sc_dev.dv_xname); 418 ifp->if_oerrors++; 419 ofnet_stop(of); 420 ofnet_init(of); 421 } 422 423 #if NIPKDB_OFN > 0 424 static void 425 ipkdbofstart(struct ipkdb_if *kip) 426 { 427 int unit = kip->unit - 1; 428 429 if (ipkdb_of) 430 ipkdbattach(kip, &ipkdb_of->sc_ethercom); 431 } 432 433 static void 434 ipkdbofleave(struct ipkdb_if *kip) 435 { 436 } 437 438 static int 439 ipkdbofrcv(struct ipkdb_if *kip, u_char *buf, int poll) 440 { 441 int l; 442 443 do { 444 l = OF_read(kip->port, buf, ETHERMTU); 445 if (l < 0) 446 l = 0; 447 } while (!poll && !l); 448 return l; 449 } 450 451 static void 452 ipkdbofsend(struct ipkdb_if *kip, u_char *buf, int l) 453 { 454 OF_write(kip->port, buf, l); 455 } 456 457 static int 458 ipkdbprobe(struct cfdata *match, void *aux) 459 { 460 struct ipkdb_if *kip = aux; 461 static char name[256]; 462 int len; 463 int phandle; 464 465 kip->unit = match->cf_unit + 1; 466 467 if (!(kip->port = OF_open("net"))) 468 return -1; 469 if ((len = OF_instance_to_path(kip->port, name, sizeof name - 1)) < 0 || 470 len >= sizeof name) 471 return -1; 472 name[len] = 0; 473 if ((phandle = OF_instance_to_package(kip->port)) == -1) 474 return -1; 475 if (OF_getprop(phandle, "mac-address", kip->myenetaddr, 476 sizeof kip->myenetaddr) < 0) 477 return -1; 478 479 kip->flags |= IPKDB_MYHW; 480 kip->name = name; 481 kip->start = ipkdbofstart; 482 kip->leave = ipkdbofleave; 483 kip->receive = ipkdbofrcv; 484 kip->send = ipkdbofsend; 485 486 kifp = kip; 487 488 return 0; 489 } 490 #endif 491