1 /* $NetBSD: if_se.c,v 1.30 2000/06/09 08:54:22 enami Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Ian W. Dall <ian.dall@dsto.defence.gov.au> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Ian W. Dall. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Driver for Cabletron EA41x scsi ethernet adaptor. 35 * 36 * Written by Ian Dall <ian.dall@dsto.defence.gov.au> Feb 3, 1997 37 * 38 * Acknowledgement: Thanks are due to Philip L. Budne <budd@cs.bu.edu> 39 * who reverse engineered the EA41x. In developing this code, 40 * Phil's userland daemon "etherd", was refered to extensively in lieu 41 * of accurate documentation for the device. 42 * 43 * This is a weird device! It doesn't conform to the scsi spec in much 44 * at all. About the only standard command supported is inquiry. Most 45 * commands are 6 bytes long, but the recv data is only 1 byte. Data 46 * must be received by periodically polling the device with the recv 47 * command. 48 * 49 * This driver is also a bit unusual. It must look like a network 50 * interface and it must also appear to be a scsi device to the scsi 51 * system. Hence there are cases where there are two entry points. eg 52 * sestart is to be called from the scsi subsytem and se_ifstart from 53 * the network interface subsystem. In addition, to facilitate scsi 54 * commands issued by userland programs, there are open, close and 55 * ioctl entry points. This allows a user program to, for example, 56 * display the ea41x stats and download new code into the adaptor --- 57 * functions which can't be performed through the ifconfig interface. 58 * Normal operation does not require any special userland program. 59 */ 60 61 #include "opt_inet.h" 62 #include "opt_atalk.h" 63 #include "opt_ccitt.h" 64 #include "opt_llc.h" 65 #include "opt_ns.h" 66 #include "bpfilter.h" 67 68 #include <sys/types.h> 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/callout.h> 72 #include <sys/syslog.h> 73 #include <sys/kernel.h> 74 #include <sys/file.h> 75 #include <sys/stat.h> 76 #include <sys/ioctl.h> 77 #include <sys/buf.h> 78 #include <sys/uio.h> 79 #include <sys/malloc.h> 80 #include <sys/errno.h> 81 #include <sys/device.h> 82 #include <sys/disklabel.h> 83 #include <sys/disk.h> 84 #include <sys/proc.h> 85 #include <sys/conf.h> 86 87 #include <dev/scsipi/scsipi_all.h> 88 #include <dev/scsipi/scsi_ctron_ether.h> 89 #include <dev/scsipi/scsiconf.h> 90 91 #include <sys/mbuf.h> 92 93 #include <sys/socket.h> 94 #include <net/if.h> 95 #include <net/if_dl.h> 96 #include <net/if_ether.h> 97 #include <net/if_media.h> 98 99 #ifdef INET 100 #include <netinet/in.h> 101 #include <netinet/if_inarp.h> 102 #endif 103 104 #ifdef NS 105 #include <netns/ns.h> 106 #include <netns/ns_if.h> 107 #endif 108 109 #ifdef NETATALK 110 #include <netatalk/at.h> 111 #endif 112 113 #if defined(CCITT) && defined(LLC) 114 #include <sys/socketvar.h> 115 #include <netccitt/x25.h> 116 #include <netccitt/pk.h> 117 #include <netccitt/pk_var.h> 118 #include <netccitt/pk_extern.h> 119 #endif 120 121 #if NBPFILTER > 0 122 #include <net/bpf.h> 123 #include <net/bpfdesc.h> 124 #endif 125 126 #define SETIMEOUT 1000 127 #define SEOUTSTANDING 4 128 #define SERETRIES 4 129 #define SE_PREFIX 4 130 #define ETHER_CRC 4 131 #define SEMINSIZE 60 132 133 /* Make this big enough for an ETHERMTU packet in promiscuous mode. */ 134 #define MAX_SNAP (ETHERMTU + sizeof(struct ether_header) + \ 135 SE_PREFIX + ETHER_CRC) 136 137 /* 10 full length packets appears to be the max ever returned. 16k is OK */ 138 #define RBUF_LEN (16 * 1024) 139 140 /* Tuning parameters: 141 * The EA41x only returns a maximum of 10 packets (regardless of size). 142 * We will attempt to adapt to polling fast enough to get RDATA_GOAL packets 143 * per read 144 */ 145 #define RDATA_MAX 10 146 #define RDATA_GOAL 8 147 148 /* se_poll and se_poll0 are the normal polling rate and the minimum 149 * polling rate respectively. se_poll0 should be chosen so that at 150 * maximum ethernet speed, we will read nearly RDATA_MAX packets. se_poll 151 * should be chosen for reasonable maximum latency. 152 * In practice, if we are being saturated with min length packets, we 153 * can't poll fast enough. Polling with zero delay actually 154 * worsens performance. se_poll0 is enforced to be always at least 1 155 */ 156 #define SE_POLL 40 /* default in milliseconds */ 157 #define SE_POLL0 10 /* default in milliseconds */ 158 int se_poll = 0; /* Delay in ticks set at attach time */ 159 int se_poll0 = 0; 160 int se_max_received = 0; /* Instrumentation */ 161 162 #define PROTOCMD(p, d) \ 163 ((d) = (p)) 164 165 #define PROTOCMD_DECL(name, val) \ 166 static const struct scsi_ctron_ether_generic name = val 167 168 #define PROTOCMD_DECL_SPECIAL(name, val) \ 169 static const struct __CONCAT(scsi_,name) name = val 170 171 /* Command initializers for commands using scsi_ctron_ether_generic */ 172 PROTOCMD_DECL(ctron_ether_send, {CTRON_ETHER_SEND}); 173 PROTOCMD_DECL(ctron_ether_add_proto, {CTRON_ETHER_ADD_PROTO}); 174 PROTOCMD_DECL(ctron_ether_get_addr, {CTRON_ETHER_GET_ADDR}); 175 PROTOCMD_DECL(ctron_ether_set_media, {CTRON_ETHER_SET_MEDIA}); 176 PROTOCMD_DECL(ctron_ether_set_addr, {CTRON_ETHER_SET_ADDR}); 177 PROTOCMD_DECL(ctron_ether_set_multi, {CTRON_ETHER_SET_MULTI}); 178 PROTOCMD_DECL(ctron_ether_remove_multi, {CTRON_ETHER_REMOVE_MULTI}); 179 180 /* Command initializers for commands using their own structures */ 181 PROTOCMD_DECL_SPECIAL(ctron_ether_recv, {CTRON_ETHER_RECV}); 182 PROTOCMD_DECL_SPECIAL(ctron_ether_set_mode, {CTRON_ETHER_SET_MODE}); 183 184 struct se_softc { 185 struct device sc_dev; 186 struct ethercom sc_ethercom; /* Ethernet common part */ 187 struct scsipi_link *sc_link; /* contains our targ, lun, etc. */ 188 189 struct callout sc_ifstart_ch; 190 struct callout sc_recv_ch; 191 192 char *sc_tbuf; 193 char *sc_rbuf; 194 int protos; 195 #define PROTO_IP 0x01 196 #define PROTO_ARP 0x02 197 #define PROTO_REVARP 0x04 198 #define PROTO_AT 0x08 199 #define PROTO_AARP 0x10 200 int sc_debug; 201 int sc_flags; 202 #define SE_NEED_RECV 0x1 203 int sc_last_timeout; 204 int sc_enabled; 205 }; 206 207 cdev_decl(se); 208 209 static int sematch __P((struct device *, struct cfdata *, void *)); 210 static void seattach __P((struct device *, struct device *, void *)); 211 212 static void se_ifstart __P((struct ifnet *)); 213 static void sestart __P((void *)); 214 215 static void sedone __P((struct scsipi_xfer *)); 216 static int se_ioctl __P((struct ifnet *, u_long, caddr_t)); 217 static void sewatchdog __P((struct ifnet *)); 218 219 static __inline u_int16_t ether_cmp __P((void *, void *)); 220 static void se_recv __P((void *)); 221 static struct mbuf *se_get __P((struct se_softc *, char *, int)); 222 static int se_read __P((struct se_softc *, char *, int)); 223 static int se_reset __P((struct se_softc *)); 224 static int se_add_proto __P((struct se_softc *, int)); 225 static int se_get_addr __P((struct se_softc *, u_int8_t *)); 226 static int se_set_media __P((struct se_softc *, int)); 227 static int se_init __P((struct se_softc *)); 228 static int se_set_multi __P((struct se_softc *, u_int8_t *)); 229 static int se_remove_multi __P((struct se_softc *, u_int8_t *)); 230 #if 0 231 static int sc_set_all_multi __P((struct se_softc *, int)); 232 #endif 233 static void se_stop __P((struct se_softc *)); 234 static __inline int se_scsipi_cmd __P((struct scsipi_link *sc_link, 235 struct scsipi_generic *scsipi_cmd, 236 int cmdlen, u_char *data_addr, int datalen, 237 int retries, int timeout, struct buf *bp, 238 int flags)); 239 static void se_delayed_ifstart __P((void *)); 240 static int se_set_mode(struct se_softc *, int, int); 241 242 int se_enable __P((struct se_softc *)); 243 void se_disable __P((struct se_softc *)); 244 245 struct cfattach se_ca = { 246 sizeof(struct se_softc), sematch, seattach 247 }; 248 249 extern struct cfdriver se_cd; 250 251 struct scsipi_device se_switch = { 252 NULL, /* Use default error handler */ 253 sestart, /* have a queue, served by this */ 254 NULL, /* have no async handler */ 255 sedone, /* deal with stats at interrupt time */ 256 }; 257 258 struct scsipi_inquiry_pattern se_patterns[] = { 259 {T_PROCESSOR, T_FIXED, 260 "CABLETRN", "EA412", ""}, 261 {T_PROCESSOR, T_FIXED, 262 "Cabletrn", "EA412", ""}, 263 }; 264 265 /* 266 * Compare two Ether/802 addresses for equality, inlined and 267 * unrolled for speed. 268 * Note: use this like bcmp() 269 */ 270 static __inline u_int16_t 271 ether_cmp(one, two) 272 void *one, *two; 273 { 274 u_int16_t *a = (u_int16_t *) one; 275 u_int16_t *b = (u_int16_t *) two; 276 u_int16_t diff; 277 278 diff = (a[0] - b[0]) | (a[1] - b[1]) | (a[2] - b[2]); 279 280 return (diff); 281 } 282 283 #define ETHER_CMP ether_cmp 284 285 static int 286 sematch(parent, match, aux) 287 struct device *parent; 288 struct cfdata *match; 289 void *aux; 290 { 291 struct scsipibus_attach_args *sa = aux; 292 int priority; 293 294 (void)scsipi_inqmatch(&sa->sa_inqbuf, 295 (caddr_t)se_patterns, sizeof(se_patterns) / sizeof(se_patterns[0]), 296 sizeof(se_patterns[0]), &priority); 297 return (priority); 298 } 299 300 /* 301 * The routine called by the low level scsi routine when it discovers 302 * a device suitable for this driver. 303 */ 304 static void 305 seattach(parent, self, aux) 306 struct device *parent, *self; 307 void *aux; 308 { 309 struct se_softc *sc = (void *)self; 310 struct scsipibus_attach_args *sa = aux; 311 struct scsipi_link *sc_link = sa->sa_sc_link; 312 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 313 u_int8_t myaddr[ETHER_ADDR_LEN]; 314 315 printf("\n"); 316 SC_DEBUG(sc_link, SDEV_DB2, ("seattach: ")); 317 318 callout_init(&sc->sc_ifstart_ch); 319 callout_init(&sc->sc_recv_ch); 320 321 /* 322 * Store information needed to contact our base driver 323 */ 324 sc->sc_link = sc_link; 325 sc_link->device = &se_switch; 326 sc_link->device_softc = sc; 327 if (sc_link->openings > SEOUTSTANDING) 328 sc_link->openings = SEOUTSTANDING; 329 330 se_poll = (SE_POLL * hz) / 1000; 331 se_poll = se_poll? se_poll: 1; 332 se_poll0 = (SE_POLL0 * hz) / 1000; 333 se_poll0 = se_poll0? se_poll0: 1; 334 335 /* 336 * Initialize and attach a buffer 337 */ 338 sc->sc_tbuf = malloc(ETHERMTU + sizeof(struct ether_header), 339 M_DEVBUF, M_NOWAIT); 340 if (sc->sc_tbuf == 0) 341 panic("seattach: can't allocate transmit buffer"); 342 343 sc->sc_rbuf = malloc(RBUF_LEN, M_DEVBUF, M_NOWAIT);/* A Guess */ 344 if (sc->sc_rbuf == 0) 345 panic("seattach: can't allocate receive buffer"); 346 347 se_get_addr(sc, myaddr); 348 349 /* Initialize ifnet structure. */ 350 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 351 ifp->if_softc = sc; 352 ifp->if_start = se_ifstart; 353 ifp->if_ioctl = se_ioctl; 354 ifp->if_watchdog = sewatchdog; 355 ifp->if_flags = 356 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 357 358 /* Attach the interface. */ 359 if_attach(ifp); 360 ether_ifattach(ifp, myaddr); 361 362 #if NBPFILTER > 0 363 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 364 #endif 365 } 366 367 368 static __inline int 369 se_scsipi_cmd(sc_link, scsipi_cmd, cmdlen, data_addr, datalen, 370 retries, timeout, bp, flags) 371 struct scsipi_link *sc_link; 372 struct scsipi_generic *scsipi_cmd; 373 int cmdlen; 374 u_char *data_addr; 375 int datalen; 376 int retries; 377 int timeout; 378 struct buf *bp; 379 int flags; 380 { 381 int error; 382 int s = splbio(); 383 384 error = scsipi_command(sc_link, scsipi_cmd, cmdlen, data_addr, 385 datalen, retries, timeout, bp, flags); 386 splx(s); 387 return (error); 388 } 389 390 /* Start routine for calling from scsi sub system */ 391 static void 392 sestart(v) 393 void *v; 394 { 395 struct se_softc *sc = (struct se_softc *) v; 396 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 397 int s = splnet(); 398 399 se_ifstart(ifp); 400 (void) splx(s); 401 } 402 403 static void 404 se_delayed_ifstart(v) 405 void *v; 406 { 407 struct ifnet *ifp = v; 408 struct se_softc *sc = ifp->if_softc; 409 int s; 410 411 s = splnet(); 412 if (sc->sc_enabled) { 413 ifp->if_flags &= ~IFF_OACTIVE; 414 se_ifstart(ifp); 415 } 416 splx(s); 417 } 418 419 /* 420 * Start transmission on the interface. 421 * Always called at splnet(). 422 */ 423 static void 424 se_ifstart(ifp) 425 struct ifnet *ifp; 426 { 427 struct se_softc *sc = ifp->if_softc; 428 struct scsi_ctron_ether_generic send_cmd; 429 struct mbuf *m, *m0; 430 int len, error; 431 u_char *cp; 432 433 /* Don't transmit if interface is busy or not running */ 434 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 435 return; 436 437 IF_DEQUEUE(&ifp->if_snd, m0); 438 if (m0 == 0) 439 return; 440 #if NBPFILTER > 0 441 /* If BPF is listening on this interface, let it see the 442 * packet before we commit it to the wire. 443 */ 444 if (ifp->if_bpf) 445 bpf_mtap(ifp->if_bpf, m0); 446 #endif 447 448 /* We need to use m->m_pkthdr.len, so require the header */ 449 if ((m0->m_flags & M_PKTHDR) == 0) 450 panic("ctscstart: no header mbuf"); 451 len = m0->m_pkthdr.len; 452 453 /* Mark the interface busy. */ 454 ifp->if_flags |= IFF_OACTIVE; 455 456 /* Chain; copy into linear buffer we allocated at attach time. */ 457 cp = sc->sc_tbuf; 458 for (m = m0; m != NULL; ) { 459 bcopy(mtod(m, u_char *), cp, m->m_len); 460 cp += m->m_len; 461 MFREE(m, m0); 462 m = m0; 463 } 464 if (len < SEMINSIZE) { 465 #ifdef SEDEBUG 466 if (sc->sc_debug) 467 printf("se: packet size %d (%d) < %d\n", len, 468 cp - (u_char *)sc->sc_tbuf, SEMINSIZE); 469 #endif 470 bzero(cp, SEMINSIZE - len); 471 len = SEMINSIZE; 472 } 473 474 /* Fill out SCSI command. */ 475 PROTOCMD(ctron_ether_send, send_cmd); 476 _lto2b(len, send_cmd.length); 477 478 /* Send command to device. */ 479 error = se_scsipi_cmd(sc->sc_link, 480 (struct scsipi_generic *)&send_cmd, sizeof(send_cmd), 481 sc->sc_tbuf, len, SERETRIES, 482 SETIMEOUT, NULL, XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_DATA_OUT); 483 if (error) { 484 printf("%s: not queued, error %d\n", 485 sc->sc_dev.dv_xname, error); 486 ifp->if_oerrors++; 487 ifp->if_flags &= ~IFF_OACTIVE; 488 } else 489 ifp->if_opackets++; 490 if (sc->sc_flags & SE_NEED_RECV) { 491 sc->sc_flags &= ~SE_NEED_RECV; 492 se_recv((void *) sc); 493 } 494 } 495 496 497 /* 498 * Called from the scsibus layer via our scsi device switch. 499 */ 500 static void 501 sedone(xs) 502 struct scsipi_xfer *xs; 503 { 504 int error; 505 struct se_softc *sc = xs->sc_link->device_softc; 506 struct scsipi_generic *cmd = xs->cmd; 507 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 508 int s; 509 510 error = !(xs->error == XS_NOERROR); 511 512 s = splnet(); 513 if(IS_SEND(cmd)) { 514 if (xs->error == XS_BUSY) { 515 printf("se: busy, retry txmit\n"); 516 callout_reset(&sc->sc_ifstart_ch, hz, 517 se_delayed_ifstart, ifp); 518 } else { 519 ifp->if_flags &= ~IFF_OACTIVE; 520 /* the generic scsipi_done will call 521 * sestart (through scsipi_free_xs). 522 */ 523 } 524 } else if(IS_RECV(cmd)) { 525 /* RECV complete */ 526 /* pass data up. reschedule a recv */ 527 /* scsipi_free_xs will call start. Harmless. */ 528 if (error) { 529 /* Reschedule after a delay */ 530 callout_reset(&sc->sc_recv_ch, se_poll, 531 se_recv, (void *)sc); 532 } else { 533 int n, ntimeo; 534 n = se_read(sc, xs->data, xs->datalen - xs->resid); 535 if (n > se_max_received) 536 se_max_received = n; 537 if (n == 0) 538 ntimeo = se_poll; 539 else if (n >= RDATA_MAX) 540 ntimeo = se_poll0; 541 else { 542 ntimeo = sc->sc_last_timeout; 543 ntimeo = (ntimeo * RDATA_GOAL)/n; 544 ntimeo = (ntimeo < se_poll0? 545 se_poll0: ntimeo); 546 ntimeo = (ntimeo > se_poll? 547 se_poll: ntimeo); 548 } 549 sc->sc_last_timeout = ntimeo; 550 if (ntimeo == se_poll0 && 551 ifp->if_snd.ifq_head) 552 /* Output is pending. Do next recv 553 * after the next send. */ 554 sc->sc_flags |= SE_NEED_RECV; 555 else { 556 callout_reset(&sc->sc_recv_ch, ntimeo, 557 se_recv, (void *)sc); 558 } 559 } 560 } 561 splx(s); 562 } 563 564 static void 565 se_recv(v) 566 void *v; 567 { 568 /* do a recv command */ 569 struct se_softc *sc = (struct se_softc *) v; 570 struct scsi_ctron_ether_recv recv_cmd; 571 int error; 572 573 if (sc->sc_enabled == 0) 574 return; 575 576 PROTOCMD(ctron_ether_recv, recv_cmd); 577 578 error = se_scsipi_cmd(sc->sc_link, 579 (struct scsipi_generic *)&recv_cmd, sizeof(recv_cmd), 580 sc->sc_rbuf, RBUF_LEN, SERETRIES, SETIMEOUT, NULL, 581 XS_CTL_NOSLEEP|XS_CTL_ASYNC|XS_CTL_DATA_IN); 582 if (error) 583 callout_reset(&sc->sc_recv_ch, se_poll, se_recv, (void *)sc); 584 } 585 586 /* 587 * We copy the data into mbufs. When full cluster sized units are present 588 * we copy into clusters. 589 */ 590 static struct mbuf * 591 se_get(sc, data, totlen) 592 struct se_softc *sc; 593 char *data; 594 int totlen; 595 { 596 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 597 struct mbuf *m, *m0, *newm; 598 int len; 599 600 MGETHDR(m0, M_DONTWAIT, MT_DATA); 601 if (m0 == 0) 602 return (0); 603 m0->m_pkthdr.rcvif = ifp; 604 m0->m_pkthdr.len = totlen; 605 len = MHLEN; 606 m = m0; 607 608 while (totlen > 0) { 609 if (totlen >= MINCLSIZE) { 610 MCLGET(m, M_DONTWAIT); 611 if ((m->m_flags & M_EXT) == 0) 612 goto bad; 613 len = MCLBYTES; 614 } 615 616 if (m == m0) { 617 caddr_t newdata = (caddr_t) 618 ALIGN(m->m_data + sizeof(struct ether_header)) - 619 sizeof(struct ether_header); 620 len -= newdata - m->m_data; 621 m->m_data = newdata; 622 } 623 624 m->m_len = len = min(totlen, len); 625 bcopy(data, mtod(m, caddr_t), len); 626 data += len; 627 628 totlen -= len; 629 if (totlen > 0) { 630 MGET(newm, M_DONTWAIT, MT_DATA); 631 if (newm == 0) 632 goto bad; 633 len = MLEN; 634 m = m->m_next = newm; 635 } 636 } 637 638 return (m0); 639 640 bad: 641 m_freem(m0); 642 return (0); 643 } 644 645 /* 646 * Pass packets to higher levels. 647 */ 648 static int 649 se_read(sc, data, datalen) 650 struct se_softc *sc; 651 char *data; 652 int datalen; 653 { 654 struct mbuf *m; 655 struct ether_header *eh; 656 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 657 int n; 658 659 n = 0; 660 while (datalen >= 2) { 661 int len = _2btol(data); 662 data += 2; 663 datalen -= 2; 664 665 if (len == 0) 666 break; 667 #ifdef SEDEBUG 668 if (sc->sc_debug) { 669 printf("se_read: datalen = %d, packetlen = %d, proto = 0x%04x\n", datalen, len, 670 ntohs(((struct ether_header *)data)->ether_type)); 671 } 672 #endif 673 if (len <= sizeof(struct ether_header) || 674 len > MAX_SNAP) { 675 #ifdef SEDEBUG 676 printf("%s: invalid packet size %d; dropping\n", 677 sc->sc_dev.dv_xname, len); 678 #endif 679 ifp->if_ierrors++; 680 goto next_packet; 681 } 682 683 /* Don't need crc. Must keep ether header for BPF */ 684 m = se_get(sc, data, len - ETHER_CRC); 685 if (m == 0) { 686 #ifdef SEDEBUG 687 if (sc->sc_debug) 688 printf("se_read: se_get returned null\n"); 689 #endif 690 ifp->if_ierrors++; 691 goto next_packet; 692 } 693 if ((ifp->if_flags & IFF_PROMISC) != 0) { 694 m_adj(m, SE_PREFIX); 695 } 696 ifp->if_ipackets++; 697 698 /* We assume that the header fit entirely in one mbuf. */ 699 eh = mtod(m, struct ether_header *); 700 701 #if NBPFILTER > 0 702 /* 703 * Check if there's a BPF listener on this interface. 704 * If so, hand off the raw packet to BPF. 705 */ 706 if (ifp->if_bpf) { 707 bpf_mtap(ifp->if_bpf, m); 708 709 /* Note that the interface cannot be in 710 * promiscuous mode if there are no BPF 711 * listeners. And if we are in promiscuous 712 * mode, we have to check if this packet is 713 * really ours. 714 */ 715 if ((ifp->if_flags & IFF_PROMISC) != 0 && 716 (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ 717 ETHER_CMP(eh->ether_dhost, LLADDR(ifp->if_sadl))) { 718 m_freem(m); 719 goto next_packet; 720 } 721 } 722 #endif 723 724 /* Pass the packet up. */ 725 (*ifp->if_input)(ifp, m); 726 727 next_packet: 728 data += len; 729 datalen -= len; 730 n++; 731 } 732 return (n); 733 } 734 735 736 static void 737 sewatchdog(ifp) 738 struct ifnet *ifp; 739 { 740 struct se_softc *sc = ifp->if_softc; 741 742 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 743 ++ifp->if_oerrors; 744 745 se_reset(sc); 746 } 747 748 static int 749 se_reset(sc) 750 struct se_softc *sc; 751 { 752 int error; 753 int s = splnet(); 754 #if 0 755 /* Maybe we don't *really* want to reset the entire bus 756 * because the ctron isn't working. We would like to send a 757 * "BUS DEVICE RESET" message, but don't think the ctron 758 * understands it. 759 */ 760 error = se_scsipi_cmd(sc->sc_link, 0, 0, 0, 0, SERETRIES, 2000, NULL, 761 XS_CTL_RESET); 762 #endif 763 error = se_init(sc); 764 splx(s); 765 return (error); 766 } 767 768 static int 769 se_add_proto(sc, proto) 770 struct se_softc *sc; 771 int proto; 772 { 773 int error; 774 struct scsi_ctron_ether_generic add_proto_cmd; 775 u_int8_t data[2]; 776 _lto2b(proto, data); 777 #ifdef SEDEBUG 778 if (sc->sc_debug) 779 printf("se: adding proto 0x%02x%02x\n", data[0], data[1]); 780 #endif 781 782 PROTOCMD(ctron_ether_add_proto, add_proto_cmd); 783 _lto2b(sizeof(data), add_proto_cmd.length); 784 error = se_scsipi_cmd(sc->sc_link, 785 (struct scsipi_generic *) &add_proto_cmd, sizeof(add_proto_cmd), 786 data, sizeof(data), SERETRIES, SETIMEOUT, NULL, 787 XS_CTL_DATA_OUT | XS_CTL_DATA_ONSTACK); 788 return (error); 789 } 790 791 static int 792 se_get_addr(sc, myaddr) 793 struct se_softc *sc; 794 u_int8_t *myaddr; 795 { 796 int error; 797 struct scsi_ctron_ether_generic get_addr_cmd; 798 799 PROTOCMD(ctron_ether_get_addr, get_addr_cmd); 800 _lto2b(ETHER_ADDR_LEN, get_addr_cmd.length); 801 error = se_scsipi_cmd(sc->sc_link, 802 (struct scsipi_generic *) &get_addr_cmd, sizeof(get_addr_cmd), 803 myaddr, ETHER_ADDR_LEN, SERETRIES, SETIMEOUT, NULL, 804 XS_CTL_DATA_IN | XS_CTL_DATA_ONSTACK); 805 printf("%s: ethernet address %s\n", sc->sc_dev.dv_xname, 806 ether_sprintf(myaddr)); 807 return (error); 808 } 809 810 811 static int 812 se_set_media(sc, type) 813 struct se_softc *sc; 814 int type; 815 { 816 int error; 817 struct scsi_ctron_ether_generic set_media_cmd; 818 819 PROTOCMD(ctron_ether_set_media, set_media_cmd); 820 set_media_cmd.byte3 = type; 821 error = se_scsipi_cmd(sc->sc_link, 822 (struct scsipi_generic *) &set_media_cmd, sizeof(set_media_cmd), 823 0, 0, SERETRIES, SETIMEOUT, NULL, 0); 824 return (error); 825 } 826 827 static int 828 se_set_mode(sc, len, mode) 829 struct se_softc *sc; 830 int len; 831 int mode; 832 { 833 int error; 834 struct scsi_ctron_ether_set_mode set_mode_cmd; 835 836 PROTOCMD(ctron_ether_set_mode, set_mode_cmd); 837 set_mode_cmd.mode = mode; 838 _lto2b(len, set_mode_cmd.length); 839 error = se_scsipi_cmd(sc->sc_link, 840 (struct scsipi_generic *) &set_mode_cmd, sizeof(set_mode_cmd), 841 0, 0, SERETRIES, SETIMEOUT, NULL, 0); 842 return (error); 843 } 844 845 846 static int 847 se_init(sc) 848 struct se_softc *sc; 849 { 850 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 851 struct scsi_ctron_ether_generic set_addr_cmd; 852 int error; 853 854 #if NBPFILTER > 0 855 if (ifp->if_flags & IFF_PROMISC) { 856 error = se_set_mode(sc, MAX_SNAP, 1); 857 } 858 else 859 #endif 860 error = se_set_mode(sc, ETHERMTU + sizeof(struct ether_header), 861 0); 862 if (error != 0) 863 return (error); 864 865 PROTOCMD(ctron_ether_set_addr, set_addr_cmd); 866 _lto2b(ETHER_ADDR_LEN, set_addr_cmd.length); 867 error = se_scsipi_cmd(sc->sc_link, 868 (struct scsipi_generic *) &set_addr_cmd, sizeof(set_addr_cmd), 869 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN, SERETRIES, SETIMEOUT, NULL, 870 XS_CTL_DATA_OUT); 871 if (error != 0) 872 return (error); 873 874 if ((sc->protos & PROTO_IP) && 875 (error = se_add_proto(sc, ETHERTYPE_IP)) != 0) 876 return (error); 877 if ((sc->protos & PROTO_ARP) && 878 (error = se_add_proto(sc, ETHERTYPE_ARP)) != 0) 879 return (error); 880 if ((sc->protos & PROTO_REVARP) && 881 (error = se_add_proto(sc, ETHERTYPE_REVARP)) != 0) 882 return (error); 883 #ifdef NETATALK 884 if ((sc->protos & PROTO_AT) && 885 (error = se_add_proto(sc, ETHERTYPE_ATALK)) != 0) 886 return (error); 887 if ((sc->protos & PROTO_AARP) && 888 (error = se_add_proto(sc, ETHERTYPE_AARP)) != 0) 889 return (error); 890 #endif 891 892 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == IFF_UP) { 893 ifp->if_flags |= IFF_RUNNING; 894 se_recv(sc); 895 ifp->if_flags &= ~IFF_OACTIVE; 896 se_ifstart(ifp); 897 } 898 return (error); 899 } 900 901 static int 902 se_set_multi(sc, addr) 903 struct se_softc *sc; 904 u_int8_t *addr; 905 { 906 struct scsi_ctron_ether_generic set_multi_cmd; 907 int error; 908 909 if (sc->sc_debug) 910 printf("%s: set_set_multi: %s\n", sc->sc_dev.dv_xname, 911 ether_sprintf(addr)); 912 913 PROTOCMD(ctron_ether_set_multi, set_multi_cmd); 914 _lto2b(sizeof(addr), set_multi_cmd.length); 915 error = se_scsipi_cmd(sc->sc_link, 916 (struct scsipi_generic *) &set_multi_cmd, sizeof(set_multi_cmd), 917 addr, sizeof(addr), SERETRIES, SETIMEOUT, NULL, XS_CTL_DATA_OUT); 918 return (error); 919 } 920 921 static int 922 se_remove_multi(sc, addr) 923 struct se_softc *sc; 924 u_int8_t *addr; 925 { 926 struct scsi_ctron_ether_generic remove_multi_cmd; 927 int error; 928 929 if (sc->sc_debug) 930 printf("%s: se_remove_multi: %s\n", sc->sc_dev.dv_xname, 931 ether_sprintf(addr)); 932 933 PROTOCMD(ctron_ether_remove_multi, remove_multi_cmd); 934 _lto2b(sizeof(addr), remove_multi_cmd.length); 935 error = se_scsipi_cmd(sc->sc_link, 936 (struct scsipi_generic *) &remove_multi_cmd, 937 sizeof(remove_multi_cmd), 938 addr, sizeof(addr), SERETRIES, SETIMEOUT, NULL, XS_CTL_DATA_OUT); 939 return (error); 940 } 941 942 #if 0 /* not used --thorpej */ 943 static int 944 sc_set_all_multi(sc, set) 945 struct se_softc *sc; 946 int set; 947 { 948 int error = 0; 949 u_int8_t *addr; 950 struct ethercom *ac = &sc->sc_ethercom; 951 struct ether_multi *enm; 952 struct ether_multistep step; 953 954 ETHER_FIRST_MULTI(step, ac, enm); 955 while (enm != NULL) { 956 if (ETHER_CMP(enm->enm_addrlo, enm->enm_addrhi)) { 957 /* 958 * We must listen to a range of multicast addresses. 959 * For now, just accept all multicasts, rather than 960 * trying to set only those filter bits needed to match 961 * the range. (At this time, the only use of address 962 * ranges is for IP multicast routing, for which the 963 * range is big enough to require all bits set.) 964 */ 965 /* We have no way of adding a range to this device. 966 * stepping through all addresses in the range is 967 * typically not possible. The only real alternative 968 * is to go into promicuous mode and filter by hand. 969 */ 970 return (ENODEV); 971 972 } 973 974 addr = enm->enm_addrlo; 975 if ((error = set ? se_set_multi(sc, addr) : 976 se_remove_multi(sc, addr)) != 0) 977 return (error); 978 ETHER_NEXT_MULTI(step, enm); 979 } 980 return (error); 981 } 982 #endif /* not used */ 983 984 static void 985 se_stop(sc) 986 struct se_softc *sc; 987 { 988 989 /* Don't schedule any reads */ 990 callout_stop(&sc->sc_recv_ch); 991 992 /* How can we abort any scsi cmds in progress? */ 993 } 994 995 996 /* 997 * Process an ioctl request. 998 */ 999 static int 1000 se_ioctl(ifp, cmd, data) 1001 struct ifnet *ifp; 1002 u_long cmd; 1003 caddr_t data; 1004 { 1005 struct se_softc *sc = ifp->if_softc; 1006 struct ifaddr *ifa = (struct ifaddr *)data; 1007 struct ifreq *ifr = (struct ifreq *)data; 1008 int s, error = 0; 1009 1010 s = splnet(); 1011 1012 switch (cmd) { 1013 1014 case SIOCSIFADDR: 1015 if ((error = se_enable(sc)) != 0) 1016 break; 1017 ifp->if_flags |= IFF_UP; 1018 1019 if ((error = se_set_media(sc, CMEDIA_AUTOSENSE) != 0)) 1020 break; 1021 1022 switch (ifa->ifa_addr->sa_family) { 1023 #ifdef INET 1024 case AF_INET: 1025 sc->protos |= (PROTO_IP | PROTO_ARP | PROTO_REVARP); 1026 if ((error = se_init(sc)) != 0) 1027 break; 1028 arp_ifinit(ifp, ifa); 1029 break; 1030 #endif 1031 #ifdef NS 1032 case AF_NS: 1033 { 1034 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1035 1036 if (ns_nullhost(*ina)) 1037 ina->x_host = 1038 *(union ns_host *)LLADDR(ifp->if_sadl); 1039 else 1040 bcopy(ina->x_host.c_host, 1041 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1042 /* Set new address. */ 1043 1044 error = se_init(sc); 1045 break; 1046 } 1047 #endif 1048 #ifdef NETATALK 1049 case AF_APPLETALK: 1050 sc->protos |= (PROTO_AT | PROTO_AARP); 1051 if ((error = se_init(sc)) != 0) 1052 break; 1053 break; 1054 #endif 1055 default: 1056 error = se_init(sc); 1057 break; 1058 } 1059 break; 1060 1061 #if defined(CCITT) && defined(LLC) 1062 case SIOCSIFCONF_X25: 1063 if ((error = se_enable(sc)) != 0) 1064 break; 1065 ifp->if_flags |= IFF_UP; 1066 ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ 1067 error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); 1068 if (error == 0) 1069 error = se_init(sc); 1070 break; 1071 #endif /* CCITT && LLC */ 1072 1073 case SIOCSIFFLAGS: 1074 if ((ifp->if_flags & IFF_UP) == 0 && 1075 (ifp->if_flags & IFF_RUNNING) != 0) { 1076 /* 1077 * If interface is marked down and it is running, then 1078 * stop it. 1079 */ 1080 se_stop(sc); 1081 ifp->if_flags &= ~IFF_RUNNING; 1082 se_disable(sc); 1083 } else if ((ifp->if_flags & IFF_UP) != 0 && 1084 (ifp->if_flags & IFF_RUNNING) == 0) { 1085 /* 1086 * If interface is marked up and it is stopped, then 1087 * start it. 1088 */ 1089 if ((error = se_enable(sc)) != 0) 1090 break; 1091 error = se_init(sc); 1092 } else if (sc->sc_enabled) { 1093 /* 1094 * Reset the interface to pick up changes in any other 1095 * flags that affect hardware registers. 1096 */ 1097 error = se_init(sc); 1098 } 1099 #ifdef SEDEBUG 1100 if (ifp->if_flags & IFF_DEBUG) 1101 sc->sc_debug = 1; 1102 else 1103 sc->sc_debug = 0; 1104 #endif 1105 break; 1106 1107 case SIOCADDMULTI: 1108 if (sc->sc_enabled == 0) { 1109 error = EIO; 1110 break; 1111 } 1112 if (ether_addmulti(ifr, &sc->sc_ethercom) == ENETRESET) 1113 error = se_set_multi(sc, ifr->ifr_addr.sa_data); 1114 else 1115 error = 0; 1116 break; 1117 case SIOCDELMULTI: 1118 if (sc->sc_enabled == 0) { 1119 error = EIO; 1120 break; 1121 } 1122 if (ether_delmulti(ifr, &sc->sc_ethercom) == ENETRESET) 1123 error = se_remove_multi(sc, ifr->ifr_addr.sa_data); 1124 else 1125 error = 0; 1126 break; 1127 1128 default: 1129 1130 error = EINVAL; 1131 break; 1132 } 1133 1134 splx(s); 1135 return (error); 1136 } 1137 1138 /* 1139 * Enable the network interface. 1140 */ 1141 int 1142 se_enable(sc) 1143 struct se_softc *sc; 1144 { 1145 int error = 0; 1146 1147 if (sc->sc_enabled == 0 && 1148 (error = scsipi_adapter_addref(sc->sc_link)) == 0) 1149 sc->sc_enabled = 1; 1150 else 1151 printf("%s: device enable failed\n", 1152 sc->sc_dev.dv_xname); 1153 1154 return (error); 1155 } 1156 1157 /* 1158 * Disable the network interface. 1159 */ 1160 void 1161 se_disable(sc) 1162 struct se_softc *sc; 1163 { 1164 1165 if (sc->sc_enabled != 0) { 1166 scsipi_adapter_delref(sc->sc_link); 1167 sc->sc_enabled = 0; 1168 } 1169 } 1170 1171 #define SEUNIT(z) (minor(z)) 1172 /* 1173 * open the device. 1174 */ 1175 int 1176 seopen(dev, flag, fmt, p) 1177 dev_t dev; 1178 int flag, fmt; 1179 struct proc *p; 1180 { 1181 int unit, error; 1182 struct se_softc *sc; 1183 struct scsipi_link *sc_link; 1184 1185 unit = SEUNIT(dev); 1186 if (unit >= se_cd.cd_ndevs) 1187 return (ENXIO); 1188 sc = se_cd.cd_devs[unit]; 1189 if (sc == NULL) 1190 return (ENXIO); 1191 1192 sc_link = sc->sc_link; 1193 1194 if ((error = scsipi_adapter_addref(sc_link)) != 0) 1195 return (error); 1196 1197 SC_DEBUG(sc_link, SDEV_DB1, 1198 ("scopen: dev=0x%x (unit %d (of %d))\n", dev, unit, 1199 se_cd.cd_ndevs)); 1200 1201 sc_link->flags |= SDEV_OPEN; 1202 1203 SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n")); 1204 return (0); 1205 } 1206 1207 /* 1208 * close the device.. only called if we are the LAST 1209 * occurence of an open device 1210 */ 1211 int 1212 seclose(dev, flag, fmt, p) 1213 dev_t dev; 1214 int flag, fmt; 1215 struct proc *p; 1216 { 1217 struct se_softc *sc = se_cd.cd_devs[SEUNIT(dev)]; 1218 1219 SC_DEBUG(sc->sc_link, SDEV_DB1, ("closing\n")); 1220 1221 scsipi_wait_drain(sc->sc_link); 1222 1223 scsipi_adapter_delref(sc->sc_link); 1224 sc->sc_link->flags &= ~SDEV_OPEN; 1225 1226 return (0); 1227 } 1228 1229 /* 1230 * Perform special action on behalf of the user 1231 * Only does generic scsi ioctls. 1232 */ 1233 int 1234 seioctl(dev, cmd, addr, flag, p) 1235 dev_t dev; 1236 u_long cmd; 1237 caddr_t addr; 1238 int flag; 1239 struct proc *p; 1240 { 1241 struct se_softc *sc = se_cd.cd_devs[SEUNIT(dev)]; 1242 1243 return (scsipi_do_ioctl(sc->sc_link, dev, cmd, addr, flag, p)); 1244 } 1245