| 1 | /* Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted |
| 2 | * to use, copy, modify and distribute this software provided that both |
| 3 | * the copyright notice and this permission notice appear in all copies |
| 4 | * of the software, derivative works or modified versions, and any |
| 5 | * portions thereof. |
| 6 | * |
| 7 | * Questions, comments, bug reports and fixes to kimmel@cs.umass.edu. |
| 8 | * |
| 9 | * $FreeBSD: src/sys/i386/isa/if_el.c,v 1.47.2.2 2000/07/17 21:24:30 archie Exp $ |
| 10 | * $DragonFly: src/sys/dev/netif/el/if_el.c,v 1.24 2008/09/07 07:48:29 swildner Exp $ |
| 11 | */ |
| 12 | /* Except of course for the portions of code lifted from other FreeBSD |
| 13 | * drivers (mainly elread, elget and el_ioctl) |
| 14 | */ |
| 15 | /* 3COM Etherlink 3C501 device driver for FreeBSD */ |
| 16 | /* Yeah, I know these cards suck, but you can also get them for free |
| 17 | * really easily... |
| 18 | */ |
| 19 | /* Bugs/possible improvements: |
| 20 | * - Does not currently support DMA |
| 21 | * - Does not currently support multicasts |
| 22 | */ |
| 23 | #include "use_el.h" |
| 24 | #include "opt_inet.h" |
| 25 | #include "opt_ipx.h" |
| 26 | |
| 27 | #include <sys/param.h> |
| 28 | #include <sys/systm.h> |
| 29 | #include <sys/sockio.h> |
| 30 | #include <sys/mbuf.h> |
| 31 | #include <sys/socket.h> |
| 32 | #include <sys/syslog.h> |
| 33 | #include <sys/linker_set.h> |
| 34 | #include <sys/module.h> |
| 35 | #include <sys/serialize.h> |
| 36 | #include <sys/thread2.h> |
| 37 | |
| 38 | #include <net/ethernet.h> |
| 39 | #include <net/if.h> |
| 40 | #include <net/ifq_var.h> |
| 41 | |
| 42 | #include <netinet/in.h> |
| 43 | #include <netinet/if_ether.h> |
| 44 | |
| 45 | #include <net/bpf.h> |
| 46 | |
| 47 | #include <machine/clock.h> |
| 48 | |
| 49 | #include <bus/isa/isa_device.h> |
| 50 | #include "if_elreg.h" |
| 51 | |
| 52 | DECLARE_DUMMY_MODULE(if_el); |
| 53 | |
| 54 | /* For debugging convenience */ |
| 55 | #ifdef EL_DEBUG |
| 56 | #define dprintf(x) kprintf x |
| 57 | #else |
| 58 | #define dprintf(x) |
| 59 | #endif |
| 60 | |
| 61 | /* el_softc: per line info and status */ |
| 62 | static struct el_softc { |
| 63 | struct arpcom arpcom; /* Ethernet common */ |
| 64 | u_short el_base; /* Base I/O addr */ |
| 65 | char el_pktbuf[EL_BUFSIZ]; /* Frame buffer */ |
| 66 | } el_softc[NEL]; |
| 67 | |
| 68 | /* Prototypes */ |
| 69 | static int el_attach(struct isa_device *); |
| 70 | static void el_init(void *); |
| 71 | static int el_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); |
| 72 | static int el_probe(struct isa_device *); |
| 73 | static void el_start(struct ifnet *); |
| 74 | static void el_reset(void *); |
| 75 | static void el_watchdog(struct ifnet *); |
| 76 | |
| 77 | static void el_stop(void *); |
| 78 | static int el_xmit(struct el_softc *,int); |
| 79 | static void elintr(void *); |
| 80 | static __inline void elread(struct el_softc *,caddr_t,int); |
| 81 | static struct mbuf *elget(caddr_t,int,struct ifnet *); |
| 82 | static __inline void el_hardreset(void *); |
| 83 | |
| 84 | /* isa_driver structure for autoconf */ |
| 85 | struct isa_driver eldriver = { |
| 86 | el_probe, el_attach, "el" |
| 87 | }; |
| 88 | |
| 89 | static struct lwkt_serialize el_serializer; |
| 90 | |
| 91 | /* Probe routine. See if the card is there and at the right place. */ |
| 92 | static int |
| 93 | el_probe(struct isa_device *idev) |
| 94 | { |
| 95 | struct el_softc *sc; |
| 96 | u_short base; /* Just for convenience */ |
| 97 | u_char station_addr[ETHER_ADDR_LEN]; |
| 98 | int i; |
| 99 | |
| 100 | lwkt_serialize_init(&el_serializer); |
| 101 | |
| 102 | /* Grab some info for our structure */ |
| 103 | sc = &el_softc[idev->id_unit]; |
| 104 | sc->el_base = idev->id_iobase; |
| 105 | base = sc->el_base; |
| 106 | |
| 107 | /* First check the base */ |
| 108 | if((base < 0x280) || (base > 0x3f0)) { |
| 109 | kprintf("el%d: ioaddr must be between 0x280 and 0x3f0\n", |
| 110 | idev->id_unit); |
| 111 | return(0); |
| 112 | } |
| 113 | |
| 114 | /* Now attempt to grab the station address from the PROM |
| 115 | * and see if it contains the 3com vendor code. |
| 116 | */ |
| 117 | dprintf(("Probing 3c501 at 0x%x...\n",base)); |
| 118 | |
| 119 | /* Reset the board */ |
| 120 | dprintf(("Resetting board...\n")); |
| 121 | outb(base+EL_AC,EL_AC_RESET); |
| 122 | DELAY(5); |
| 123 | outb(base+EL_AC,0); |
| 124 | dprintf(("Reading station address...\n")); |
| 125 | /* Now read the address */ |
| 126 | for(i=0;i<ETHER_ADDR_LEN;i++) { |
| 127 | outb(base+EL_GPBL,i); |
| 128 | station_addr[i] = inb(base+EL_EAW); |
| 129 | } |
| 130 | dprintf(("Address is %6D\n",station_addr, ":")); |
| 131 | |
| 132 | /* If the vendor code is ok, return a 1. We'll assume that |
| 133 | * whoever configured this system is right about the IRQ. |
| 134 | */ |
| 135 | if((station_addr[0] != 0x02) || (station_addr[1] != 0x60) |
| 136 | || (station_addr[2] != 0x8c)) { |
| 137 | dprintf(("Bad vendor code.\n")); |
| 138 | return(0); |
| 139 | } else { |
| 140 | dprintf(("Vendor code ok.\n")); |
| 141 | /* Copy the station address into the arpcom structure */ |
| 142 | bcopy(station_addr,sc->arpcom.ac_enaddr,ETHER_ADDR_LEN); |
| 143 | return(1); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | /* Do a hardware reset of the 3c501. Do not call until after el_probe()! */ |
| 148 | static __inline void |
| 149 | el_hardreset(void *xsc) |
| 150 | { |
| 151 | struct el_softc *sc = xsc; |
| 152 | int base; |
| 153 | int j; |
| 154 | |
| 155 | base = sc->el_base; |
| 156 | |
| 157 | /* First reset the board */ |
| 158 | outb(base+EL_AC,EL_AC_RESET); |
| 159 | DELAY(5); |
| 160 | outb(base+EL_AC,0); |
| 161 | |
| 162 | /* Then give it back its ethernet address. Thanks to the mach |
| 163 | * source code for this undocumented goodie... |
| 164 | */ |
| 165 | for(j=0;j<ETHER_ADDR_LEN;j++) |
| 166 | outb(base+j,sc->arpcom.ac_enaddr[j]); |
| 167 | } |
| 168 | |
| 169 | /* Attach the interface to the kernel data structures. By the time |
| 170 | * this is called, we know that the card exists at the given I/O address. |
| 171 | * We still assume that the IRQ given is correct. |
| 172 | */ |
| 173 | static int |
| 174 | el_attach(struct isa_device *idev) |
| 175 | { |
| 176 | struct el_softc *sc; |
| 177 | struct ifnet *ifp; |
| 178 | |
| 179 | dprintf(("Attaching el%d...\n",idev->id_unit)); |
| 180 | |
| 181 | /* Get things pointing to the right places. */ |
| 182 | idev->id_intr = (inthand2_t *)elintr; |
| 183 | sc = &el_softc[idev->id_unit]; |
| 184 | ifp = &sc->arpcom.ac_if; |
| 185 | |
| 186 | /* Now reset the board */ |
| 187 | dprintf(("Resetting board...\n")); |
| 188 | el_hardreset(sc); |
| 189 | |
| 190 | /* Initialize ifnet structure */ |
| 191 | ifp->if_softc = sc; |
| 192 | if_initname(ifp, "el", idev->id_unit); |
| 193 | ifp->if_mtu = ETHERMTU; |
| 194 | ifp->if_start = el_start; |
| 195 | ifp->if_ioctl = el_ioctl; |
| 196 | ifp->if_watchdog = el_watchdog; |
| 197 | ifp->if_init = el_init; |
| 198 | ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX); |
| 199 | ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); |
| 200 | ifq_set_ready(&ifp->if_snd); |
| 201 | |
| 202 | /* Now we can attach the interface */ |
| 203 | dprintf(("Attaching interface...\n")); |
| 204 | ether_ifattach(ifp, sc->arpcom.ac_enaddr, &el_serializer); |
| 205 | |
| 206 | dprintf(("el_attach() finished.\n")); |
| 207 | return(1); |
| 208 | } |
| 209 | |
| 210 | /* This routine resets the interface. */ |
| 211 | static void |
| 212 | el_reset(void *xsc) |
| 213 | { |
| 214 | struct el_softc *sc = xsc; |
| 215 | |
| 216 | dprintf(("elreset()\n")); |
| 217 | el_stop(sc); |
| 218 | el_init(sc); |
| 219 | } |
| 220 | |
| 221 | static void |
| 222 | el_stop(void *xsc) |
| 223 | { |
| 224 | struct el_softc *sc = xsc; |
| 225 | |
| 226 | outb(sc->el_base+EL_AC,0); |
| 227 | } |
| 228 | |
| 229 | /* Initialize interface. */ |
| 230 | static void |
| 231 | el_init(void *xsc) |
| 232 | { |
| 233 | struct el_softc *sc = xsc; |
| 234 | struct ifnet *ifp = &sc->arpcom.ac_if; |
| 235 | u_short base = sc->el_base; |
| 236 | |
| 237 | |
| 238 | /* First, reset the board. */ |
| 239 | dprintf(("Resetting board...\n")); |
| 240 | el_hardreset(sc); |
| 241 | |
| 242 | /* Configure rx */ |
| 243 | dprintf(("Configuring rx...\n")); |
| 244 | if(ifp->if_flags & IFF_PROMISC) |
| 245 | outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 246 | else |
| 247 | outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 248 | outb(base+EL_RBC,0); |
| 249 | |
| 250 | /* Configure TX */ |
| 251 | dprintf(("Configuring tx...\n")); |
| 252 | outb(base+EL_TXC,0); |
| 253 | |
| 254 | /* Start reception */ |
| 255 | dprintf(("Starting reception...\n")); |
| 256 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 257 | |
| 258 | /* Set flags appropriately */ |
| 259 | ifp->if_flags |= IFF_RUNNING; |
| 260 | ifp->if_flags &= ~IFF_OACTIVE; |
| 261 | |
| 262 | /* And start output. */ |
| 263 | el_start(ifp); |
| 264 | } |
| 265 | |
| 266 | /* Start output on interface. Get datagrams from the queue and output |
| 267 | * them, giving the receiver a chance between datagrams. Call only |
| 268 | * from splimp or interrupt level! |
| 269 | */ |
| 270 | static void |
| 271 | el_start(struct ifnet *ifp) |
| 272 | { |
| 273 | struct el_softc *sc; |
| 274 | u_short base; |
| 275 | struct mbuf *m, *m0; |
| 276 | int i, len, retries, done; |
| 277 | |
| 278 | /* Get things pointing in the right directions */ |
| 279 | sc = ifp->if_softc; |
| 280 | base = sc->el_base; |
| 281 | |
| 282 | dprintf(("el_start()...\n")); |
| 283 | |
| 284 | /* Don't do anything if output is active */ |
| 285 | if (ifp->if_flags & IFF_OACTIVE) |
| 286 | return; |
| 287 | ifp->if_flags |= IFF_OACTIVE; |
| 288 | |
| 289 | /* The main loop. They warned me against endless loops, but |
| 290 | * would I listen? NOOO.... |
| 291 | */ |
| 292 | while(1) { |
| 293 | /* Dequeue the next datagram */ |
| 294 | m0 = ifq_dequeue(&ifp->if_snd, NULL); |
| 295 | |
| 296 | /* If there's nothing to send, return. */ |
| 297 | if(m0 == NULL) { |
| 298 | sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE; |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | /* Disable the receiver */ |
| 303 | outb(base+EL_AC,EL_AC_HOST); |
| 304 | outb(base+EL_RBC,0); |
| 305 | |
| 306 | /* Copy the datagram to the buffer. */ |
| 307 | len = 0; |
| 308 | for(m = m0; m != NULL; m = m->m_next) { |
| 309 | if(m->m_len == 0) |
| 310 | continue; |
| 311 | bcopy(mtod(m,caddr_t),sc->el_pktbuf+len,m->m_len); |
| 312 | len += m->m_len; |
| 313 | } |
| 314 | m_freem(m0); |
| 315 | |
| 316 | len = max(len,ETHER_MIN_LEN); |
| 317 | |
| 318 | BPF_TAP(&sc->arpcom.ac_if, sc->el_pktbuf, len); |
| 319 | |
| 320 | /* Transfer datagram to board */ |
| 321 | dprintf(("el: xfr pkt length=%d...\n",len)); |
| 322 | i = EL_BUFSIZ - len; |
| 323 | outb(base+EL_GPBL,(i & 0xff)); |
| 324 | outb(base+EL_GPBH,((i>>8)&0xff)); |
| 325 | outsb(base+EL_BUF,sc->el_pktbuf,len); |
| 326 | |
| 327 | /* Now transmit the datagram */ |
| 328 | retries=0; |
| 329 | done=0; |
| 330 | while(!done) { |
| 331 | if(el_xmit(sc,len)) { /* Something went wrong */ |
| 332 | done = -1; |
| 333 | break; |
| 334 | } |
| 335 | /* Check out status */ |
| 336 | i = inb(base+EL_TXS); |
| 337 | dprintf(("tx status=0x%x\n",i)); |
| 338 | if(!(i & EL_TXS_READY)) { |
| 339 | dprintf(("el: err txs=%x\n",i)); |
| 340 | sc->arpcom.ac_if.if_oerrors++; |
| 341 | if(i & (EL_TXS_COLL|EL_TXS_COLL16)) { |
| 342 | if((!(i & EL_TXC_DCOLL16)) && retries < 15) { |
| 343 | retries++; |
| 344 | outb(base+EL_AC,EL_AC_HOST); |
| 345 | } |
| 346 | } |
| 347 | else |
| 348 | done = 1; |
| 349 | } |
| 350 | else { |
| 351 | sc->arpcom.ac_if.if_opackets++; |
| 352 | done = 1; |
| 353 | } |
| 354 | } |
| 355 | if(done == -1) /* Packet not transmitted */ |
| 356 | continue; |
| 357 | |
| 358 | /* Now give the card a chance to receive. |
| 359 | * Gotta love 3c501s... |
| 360 | */ |
| 361 | inb(base+EL_AS); |
| 362 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | /* This function actually attempts to transmit a datagram downloaded |
| 367 | * to the board. Call at splimp or interrupt, after downloading data! |
| 368 | * Returns 0 on success, non-0 on failure |
| 369 | */ |
| 370 | static int |
| 371 | el_xmit(struct el_softc *sc,int len) |
| 372 | { |
| 373 | int gpl; |
| 374 | int i; |
| 375 | |
| 376 | gpl = EL_BUFSIZ - len; |
| 377 | dprintf(("el: xmit...")); |
| 378 | outb((sc->el_base)+EL_GPBL,(gpl & 0xff)); |
| 379 | outb((sc->el_base)+EL_GPBH,((gpl>>8)&0xff)); |
| 380 | outb((sc->el_base)+EL_AC,EL_AC_TXFRX); |
| 381 | i = 20000; |
| 382 | while((inb((sc->el_base)+EL_AS) & EL_AS_TXBUSY) && (i>0)) |
| 383 | i--; |
| 384 | if(i == 0) { |
| 385 | dprintf(("tx not ready\n")); |
| 386 | sc->arpcom.ac_if.if_oerrors++; |
| 387 | return(-1); |
| 388 | } |
| 389 | dprintf(("%d cycles.\n",(20000-i))); |
| 390 | return(0); |
| 391 | } |
| 392 | |
| 393 | /* Pass a packet up to the higher levels. */ |
| 394 | static __inline void |
| 395 | elread(struct el_softc *sc,caddr_t buf,int len) |
| 396 | { |
| 397 | struct mbuf *m; |
| 398 | |
| 399 | /* |
| 400 | * Put packet into an mbuf chain |
| 401 | */ |
| 402 | m = elget(buf,len,&sc->arpcom.ac_if); |
| 403 | if(m) |
| 404 | sc->arpcom.ac_if.if_input(&sc->arpcom.ac_if, m); |
| 405 | } |
| 406 | |
| 407 | /* controller interrupt */ |
| 408 | static void |
| 409 | elintr(void *arg) |
| 410 | { |
| 411 | int unit = (int)arg; |
| 412 | struct el_softc *sc; |
| 413 | int base; |
| 414 | int stat, rxstat, len, done; |
| 415 | |
| 416 | lwkt_serialize_enter(&el_serializer); |
| 417 | |
| 418 | /* Get things pointing properly */ |
| 419 | sc = &el_softc[unit]; |
| 420 | base = sc->el_base; |
| 421 | |
| 422 | dprintf(("elintr: ")); |
| 423 | |
| 424 | /* Check board status */ |
| 425 | stat = inb(base+EL_AS); |
| 426 | if(stat & EL_AS_RXBUSY) { |
| 427 | inb(base+EL_RXC); |
| 428 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 429 | lwkt_serialize_exit(&el_serializer); |
| 430 | return; |
| 431 | } |
| 432 | |
| 433 | done = 0; |
| 434 | while(!done) { |
| 435 | rxstat = inb(base+EL_RXS); |
| 436 | if(rxstat & EL_RXS_STALE) { |
| 437 | inb(base+EL_RXC); |
| 438 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 439 | lwkt_serialize_exit(&el_serializer); |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | /* If there's an overflow, reinit the board. */ |
| 444 | if(!(rxstat & EL_RXS_NOFLOW)) { |
| 445 | dprintf(("overflow.\n")); |
| 446 | el_hardreset(sc); |
| 447 | /* Put board back into receive mode */ |
| 448 | if(sc->arpcom.ac_if.if_flags & IFF_PROMISC) |
| 449 | outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 450 | else |
| 451 | outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 452 | inb(base+EL_AS); |
| 453 | outb(base+EL_RBC,0); |
| 454 | inb(base+EL_RXC); |
| 455 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 456 | lwkt_serialize_exit(&el_serializer); |
| 457 | return; |
| 458 | } |
| 459 | |
| 460 | /* Incoming packet */ |
| 461 | len = inb(base+EL_RBL); |
| 462 | len |= inb(base+EL_RBH) << 8; |
| 463 | dprintf(("receive len=%d rxstat=%x ",len,rxstat)); |
| 464 | outb(base+EL_AC,EL_AC_HOST); |
| 465 | |
| 466 | /* If packet too short or too long, restore rx mode and return |
| 467 | */ |
| 468 | if((len <= sizeof(struct ether_header)) || (len > ETHER_MAX_LEN)) { |
| 469 | if(sc->arpcom.ac_if.if_flags & IFF_PROMISC) |
| 470 | outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 471 | else |
| 472 | outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW)); |
| 473 | inb(base+EL_AS); |
| 474 | outb(base+EL_RBC,0); |
| 475 | inb(base+EL_RXC); |
| 476 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 477 | lwkt_serialize_exit(&el_serializer); |
| 478 | return; |
| 479 | } |
| 480 | |
| 481 | sc->arpcom.ac_if.if_ipackets++; |
| 482 | |
| 483 | /* Copy the data into our buffer */ |
| 484 | outb(base+EL_GPBL,0); |
| 485 | outb(base+EL_GPBH,0); |
| 486 | insb(base+EL_BUF,sc->el_pktbuf,len); |
| 487 | outb(base+EL_RBC,0); |
| 488 | outb(base+EL_AC,EL_AC_RX); |
| 489 | dprintf(("%6D-->",sc->el_pktbuf+6,":")); |
| 490 | dprintf(("%6D\n",sc->el_pktbuf,":")); |
| 491 | |
| 492 | /* Pass data up to upper levels */ |
| 493 | elread(sc,(caddr_t)(sc->el_pktbuf),len); |
| 494 | |
| 495 | /* Is there another packet? */ |
| 496 | stat = inb(base+EL_AS); |
| 497 | |
| 498 | /* If so, do it all again (i.e. don't set done to 1) */ |
| 499 | if(!(stat & EL_AS_RXBUSY)) |
| 500 | dprintf(("<rescan> ")); |
| 501 | else |
| 502 | done = 1; |
| 503 | } |
| 504 | |
| 505 | inb(base+EL_RXC); |
| 506 | outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX)); |
| 507 | lwkt_serialize_exit(&el_serializer); |
| 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Pull read data off a interface. |
| 512 | * Len is length of data, with local net header stripped. |
| 513 | */ |
| 514 | static struct mbuf * |
| 515 | elget(caddr_t buf, int totlen, struct ifnet *ifp) |
| 516 | { |
| 517 | struct mbuf *top, **mp, *m; |
| 518 | int len; |
| 519 | caddr_t cp; |
| 520 | char *epkt; |
| 521 | |
| 522 | cp = buf; |
| 523 | epkt = cp + totlen; |
| 524 | |
| 525 | MGETHDR(m, MB_DONTWAIT, MT_DATA); |
| 526 | if (m == 0) |
| 527 | return (0); |
| 528 | m->m_pkthdr.len = totlen; |
| 529 | m->m_len = MHLEN; |
| 530 | top = 0; |
| 531 | mp = ⊤ |
| 532 | while (totlen > 0) { |
| 533 | if (top) { |
| 534 | MGET(m, MB_DONTWAIT, MT_DATA); |
| 535 | if (m == 0) { |
| 536 | m_freem(top); |
| 537 | return (0); |
| 538 | } |
| 539 | m->m_len = MLEN; |
| 540 | } |
| 541 | len = min(totlen, epkt - cp); |
| 542 | if (len >= MINCLSIZE) { |
| 543 | MCLGET(m, MB_DONTWAIT); |
| 544 | if (m->m_flags & M_EXT) |
| 545 | m->m_len = len = min(len, MCLBYTES); |
| 546 | else |
| 547 | len = m->m_len; |
| 548 | } else { |
| 549 | /* |
| 550 | * Place initial small packet/header at end of mbuf. |
| 551 | */ |
| 552 | if (len < m->m_len) { |
| 553 | if (top == 0 && len + max_linkhdr <= m->m_len) |
| 554 | m->m_data += max_linkhdr; |
| 555 | m->m_len = len; |
| 556 | } else |
| 557 | len = m->m_len; |
| 558 | } |
| 559 | bcopy(cp, mtod(m, caddr_t), (unsigned)len); |
| 560 | cp += len; |
| 561 | *mp = m; |
| 562 | mp = &m->m_next; |
| 563 | totlen -= len; |
| 564 | if (cp == epkt) |
| 565 | cp = buf; |
| 566 | } |
| 567 | return (top); |
| 568 | } |
| 569 | |
| 570 | /* |
| 571 | * Process an ioctl request. This code needs some work - it looks |
| 572 | * pretty ugly. |
| 573 | */ |
| 574 | static int |
| 575 | el_ioctl(struct ifnet *ifp, u_long command, caddr_t data, struct ucred *cr) |
| 576 | { |
| 577 | int error = 0; |
| 578 | |
| 579 | switch (command) { |
| 580 | case SIOCSIFFLAGS: |
| 581 | /* |
| 582 | * If interface is marked down and it is running, then stop it |
| 583 | */ |
| 584 | if (((ifp->if_flags & IFF_UP) == 0) && |
| 585 | (ifp->if_flags & IFF_RUNNING)) { |
| 586 | el_stop(ifp->if_softc); |
| 587 | ifp->if_flags &= ~IFF_RUNNING; |
| 588 | } else { |
| 589 | /* |
| 590 | * If interface is marked up and it is stopped, then start it |
| 591 | */ |
| 592 | if ((ifp->if_flags & IFF_UP) && |
| 593 | ((ifp->if_flags & IFF_RUNNING) == 0)) |
| 594 | el_init(ifp->if_softc); |
| 595 | } |
| 596 | break; |
| 597 | default: |
| 598 | error = ether_ioctl(ifp, command, data); |
| 599 | break; |
| 600 | } |
| 601 | return (error); |
| 602 | } |
| 603 | |
| 604 | /* Device timeout routine */ |
| 605 | static void |
| 606 | el_watchdog(struct ifnet *ifp) |
| 607 | { |
| 608 | log(LOG_ERR,"%s: device timeout\n", ifp->if_xname); |
| 609 | ifp->if_oerrors++; |
| 610 | el_reset(ifp->if_softc); |
| 611 | } |