i82586.c revision 1.21
1 /* $NetBSD: i82586.c,v 1.21 1999/05/18 23:52:55 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Kranenburg and Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /*- 40 * Copyright (c) 1997 Paul Kranenburg. 41 * Copyright (c) 1992, 1993, University of Vermont and State 42 * Agricultural College. 43 * Copyright (c) 1992, 1993, Garrett A. Wollman. 44 * 45 * Portions: 46 * Copyright (c) 1994, 1995, Rafal K. Boni 47 * Copyright (c) 1990, 1991, William F. Jolitz 48 * Copyright (c) 1990, The Regents of the University of California 49 * 50 * All rights reserved. 51 * 52 * Redistribution and use in source and binary forms, with or without 53 * modification, are permitted provided that the following conditions 54 * are met: 55 * 1. Redistributions of source code must retain the above copyright 56 * notice, this list of conditions and the following disclaimer. 57 * 2. Redistributions in binary form must reproduce the above copyright 58 * notice, this list of conditions and the following disclaimer in the 59 * documentation and/or other materials provided with the distribution. 60 * 3. All advertising materials mentioning features or use of this software 61 * must display the following acknowledgement: 62 * This product includes software developed by the University of Vermont 63 * and State Agricultural College and Garrett A. Wollman, by William F. 64 * Jolitz, and by the University of California, Berkeley, Lawrence 65 * Berkeley Laboratory, and its contributors. 66 * 4. Neither the names of the Universities nor the names of the authors 67 * may be used to endorse or promote products derived from this software 68 * without specific prior written permission. 69 * 70 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 71 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 72 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 73 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR AUTHORS BE LIABLE 74 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 75 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 76 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 77 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 78 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 79 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 80 * SUCH DAMAGE. 81 */ 82 83 /* 84 * Intel 82586 Ethernet chip 85 * Register, bit, and structure definitions. 86 * 87 * Original StarLAN driver written by Garrett Wollman with reference to the 88 * Clarkson Packet Driver code for this chip written by Russ Nelson and others. 89 * 90 * BPF support code taken from hpdev/if_le.c, supplied with tcpdump. 91 * 92 * 3C507 support is loosely based on code donated to NetBSD by Rafal Boni. 93 * 94 * Majorly cleaned up and 3C507 code merged by Charles Hannum. 95 * 96 * Converted to SUN ie driver by Charles D. Cranor, 97 * October 1994, January 1995. 98 * This sun version based on i386 version 1.30. 99 */ 100 101 /* 102 * The i82586 is a very painful chip, found in sun3's, sun-4/100's 103 * sun-4/200's, and VME based suns. The byte order is all wrong for a 104 * SUN, making life difficult. Programming this chip is mostly the same, 105 * but certain details differ from system to system. This driver is 106 * written so that different "ie" interfaces can be controled by the same 107 * driver. 108 */ 109 110 /* 111 Mode of operation: 112 113 We run the 82586 in a standard Ethernet mode. We keep NFRAMES 114 received frame descriptors around for the receiver to use, and 115 NRXBUF associated receive buffer descriptors, both in a circular 116 list. Whenever a frame is received, we rotate both lists as 117 necessary. (The 586 treats both lists as a simple queue.) We also 118 keep a transmit command around so that packets can be sent off 119 quickly. 120 121 We configure the adapter in AL-LOC = 1 mode, which means that the 122 Ethernet/802.3 MAC header is placed at the beginning of the receive 123 buffer rather than being split off into various fields in the RFD. 124 This also means that we must include this header in the transmit 125 buffer as well. 126 127 By convention, all transmit commands, and only transmit commands, 128 shall have the I (IE_CMD_INTR) bit set in the command. This way, 129 when an interrupt arrives at i82586_intr(), it is immediately possible 130 to tell what precisely caused it. ANY OTHER command-sending 131 routines should run at splnet(), and should post an acknowledgement 132 to every interrupt they generate. 133 134 To save the expense of shipping a command to 82586 every time we 135 want to send a frame, we use a linked list of commands consisting 136 of alternate XMIT and NOP commands. The links of these elements 137 are manipulated (in iexmit()) such that the NOP command loops back 138 to itself whenever the following XMIT command is not yet ready to 139 go. Whenever an XMIT is ready, the preceding NOP link is pointed 140 at it, while its own link field points to the following NOP command. 141 Thus, a single transmit command sets off an interlocked traversal 142 of the xmit command chain, with the host processor in control of 143 the synchronization. 144 */ 145 146 #include "opt_inet.h" 147 #include "opt_ns.h" 148 #include "bpfilter.h" 149 150 #include <sys/param.h> 151 #include <sys/systm.h> 152 #include <sys/mbuf.h> 153 #include <sys/buf.h> 154 #include <sys/protosw.h> 155 #include <sys/socket.h> 156 #include <sys/ioctl.h> 157 #include <sys/errno.h> 158 #include <sys/syslog.h> 159 #include <sys/device.h> 160 161 #include <net/if.h> 162 #include <net/if_dl.h> 163 #include <net/if_types.h> 164 #include <net/if_media.h> 165 #include <net/if_ether.h> 166 167 #if NBPFILTER > 0 168 #include <net/bpf.h> 169 #include <net/bpfdesc.h> 170 #endif 171 172 #ifdef INET 173 #include <netinet/in.h> 174 #include <netinet/in_systm.h> 175 #include <netinet/in_var.h> 176 #include <netinet/ip.h> 177 #include <netinet/if_inarp.h> 178 #endif 179 180 #ifdef NS 181 #include <netns/ns.h> 182 #include <netns/ns_if.h> 183 #endif 184 185 #include <machine/bus.h> 186 187 #include <dev/ic/i82586reg.h> 188 #include <dev/ic/i82586var.h> 189 190 void i82586_reset __P((struct ie_softc *, int)); 191 void i82586_watchdog __P((struct ifnet *)); 192 int i82586_init __P((struct ie_softc *)); 193 int i82586_ioctl __P((struct ifnet *, u_long, caddr_t)); 194 void i82586_start __P((struct ifnet *)); 195 196 int i82586_rint __P((struct ie_softc *, int)); 197 int i82586_tint __P((struct ie_softc *, int)); 198 199 int i82586_mediachange __P((struct ifnet *)); 200 void i82586_mediastatus __P((struct ifnet *, 201 struct ifmediareq *)); 202 203 static int ie_readframe __P((struct ie_softc *, int)); 204 static struct mbuf *ieget __P((struct ie_softc *, int *, 205 int, int)); 206 static int i82586_get_rbd_list __P((struct ie_softc *, 207 u_int16_t *, u_int16_t *, int *)); 208 static void i82586_release_rbd_list __P((struct ie_softc *, 209 u_int16_t, u_int16_t)); 210 static int i82586_drop_frames __P((struct ie_softc *)); 211 static int i82586_chk_rx_ring __P((struct ie_softc *)); 212 213 static __inline__ void ie_ack __P((struct ie_softc *, u_int)); 214 static __inline__ void iexmit __P((struct ie_softc *)); 215 static void i82586_start_transceiver 216 __P((struct ie_softc *)); 217 static void iestop __P((struct ie_softc *)); 218 219 static __inline__ int ether_equal __P((u_char *, u_char *)); 220 static __inline__ int check_eh __P((struct ie_softc *, 221 struct ether_header *, int *)); 222 223 static void i82586_count_errors __P((struct ie_softc *)); 224 static void i82586_rx_errors __P((struct ie_softc *, int, int)); 225 static void i82586_setup_bufs __P((struct ie_softc *)); 226 static void setup_simple_command __P((struct ie_softc *, int, int)); 227 static int ie_cfg_setup __P((struct ie_softc *, int, int, int)); 228 static int ie_ia_setup __P((struct ie_softc *, int)); 229 static void ie_run_tdr __P((struct ie_softc *, int)); 230 static int ie_mc_setup __P((struct ie_softc *, int)); 231 static void ie_mc_reset __P((struct ie_softc *)); 232 static int i82586_start_cmd __P((struct ie_softc *, 233 int, int, int, int)); 234 static int i82586_cmd_wait __P((struct ie_softc *)); 235 236 #ifdef I82586_DEBUG 237 void print_rbd __P((struct ie_softc *, int)); 238 239 int spurious_intrs = 0; 240 #endif 241 242 243 /* 244 * Front-ends call this function to attach to the MI driver. 245 * 246 * The front-end has responsibility for managing the ICP and ISCP 247 * structures. Both of these are opaque to us. Also, the front-end 248 * chooses a location for the SCB which is expected to be addressable 249 * (through `sc->scb') as an offset against the shared-memory bus handle. 250 * 251 * The following MD interface function must be setup by the front-end 252 * before calling here: 253 * 254 * hwreset - board dependent reset 255 * hwinit - board dependent initialization 256 * chan_attn - channel attention 257 * intrhook - board dependent interrupt processing 258 * memcopyin - shared memory copy: board to KVA 259 * memcopyout - shared memory copy: KVA to board 260 * ie_bus_read16 - read a sixteen-bit i82586 pointer 261 * ie_bus_write16 - write a sixteen-bit i82586 pointer 262 * ie_bus_write24 - write a twenty-four-bit i82586 pointer 263 * 264 */ 265 void 266 i82586_attach(sc, name, etheraddr, media, nmedia, defmedia) 267 struct ie_softc *sc; 268 char *name; 269 u_int8_t *etheraddr; 270 int *media, nmedia, defmedia; 271 { 272 int i; 273 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 274 275 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 276 ifp->if_softc = sc; 277 ifp->if_start = i82586_start; 278 ifp->if_ioctl = i82586_ioctl; 279 ifp->if_watchdog = i82586_watchdog; 280 ifp->if_flags = 281 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 282 283 /* Initialize media goo. */ 284 ifmedia_init(&sc->sc_media, 0, i82586_mediachange, i82586_mediastatus); 285 if (media != NULL) { 286 for (i = 0; i < nmedia; i++) 287 ifmedia_add(&sc->sc_media, media[i], 0, NULL); 288 ifmedia_set(&sc->sc_media, defmedia); 289 } else { 290 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 291 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 292 } 293 294 /* Attach the interface. */ 295 if_attach(ifp); 296 ether_ifattach(ifp, etheraddr); 297 298 printf(" address %s, type %s\n", ether_sprintf(etheraddr), name); 299 300 #if NBPFILTER > 0 301 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 302 #endif 303 } 304 305 306 /* 307 * Device timeout/watchdog routine. 308 * Entered if the device neglects to generate an interrupt after a 309 * transmit has been started on it. 310 */ 311 void 312 i82586_watchdog(ifp) 313 struct ifnet *ifp; 314 { 315 struct ie_softc *sc = ifp->if_softc; 316 317 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 318 ++ifp->if_oerrors; 319 320 i82586_reset(sc, 1); 321 } 322 323 324 /* 325 * Compare two Ether/802 addresses for equality, inlined and unrolled for 326 * speed. 327 */ 328 static __inline__ int 329 ether_equal(one, two) 330 u_char *one, *two; 331 { 332 333 if (one[5] != two[5] || one[4] != two[4] || one[3] != two[3] || 334 one[2] != two[2] || one[1] != two[1] || one[0] != two[0]) 335 return (0); 336 return (1); 337 } 338 339 /* 340 * Check for a valid address. to_bpf is filled in with one of the following: 341 * 0 -> BPF doesn't get this packet 342 * 1 -> BPF does get this packet 343 * 2 -> BPF does get this packet, but we don't 344 * Return value is true if the packet is for us, and false otherwise. 345 * 346 * This routine is a mess, but it's also critical that it be as fast 347 * as possible. It could be made cleaner if we can assume that the 348 * only client which will fiddle with IFF_PROMISC is BPF. This is 349 * probably a good assumption, but we do not make it here. (Yet.) 350 */ 351 static __inline__ int 352 check_eh(sc, eh, to_bpf) 353 struct ie_softc *sc; 354 struct ether_header *eh; 355 int *to_bpf; 356 { 357 struct ifnet *ifp; 358 int i; 359 360 ifp = &sc->sc_ethercom.ec_if; 361 362 switch(sc->promisc) { 363 case IFF_ALLMULTI: 364 /* 365 * Receiving all multicasts, but no unicasts except those 366 * destined for us. 367 */ 368 #if NBPFILTER > 0 369 /* BPF gets this packet if anybody cares */ 370 *to_bpf = (ifp->if_bpf != 0); 371 #endif 372 if (eh->ether_dhost[0] & 1) 373 return (1); 374 if (ether_equal(eh->ether_dhost, LLADDR(ifp->if_sadl))) 375 return (1); 376 return (0); 377 378 case IFF_PROMISC: 379 /* 380 * Receiving all packets. These need to be passed on to BPF. 381 */ 382 #if NBPFILTER > 0 383 *to_bpf = (ifp->if_bpf != 0); 384 #endif 385 /* 386 * If for us, accept and hand up to BPF. 387 */ 388 if (ether_equal(eh->ether_dhost, LLADDR(ifp->if_sadl))) 389 return (1); 390 391 /* 392 * If it's the broadcast address, accept and hand up to BPF. 393 */ 394 if (ether_equal(eh->ether_dhost, etherbroadcastaddr)) 395 return (1); 396 397 /* 398 * If it's one of our multicast groups, accept it 399 * and pass it up. 400 */ 401 for (i = 0; i < sc->mcast_count; i++) { 402 if (ether_equal(eh->ether_dhost, 403 (u_char *)&sc->mcast_addrs[i])) { 404 #if NBPFILTER > 0 405 if (*to_bpf) 406 *to_bpf = 1; 407 #endif 408 return (1); 409 } 410 } 411 412 #if NBPFILTER > 0 413 /* Not for us; BPF wants to see it but we don't. */ 414 if (*to_bpf) 415 *to_bpf = 2; 416 #endif 417 418 return (1); 419 420 case IFF_ALLMULTI | IFF_PROMISC: 421 /* 422 * Acting as a multicast router, and BPF running at the same 423 * time. Whew! (Hope this is a fast machine...) 424 */ 425 #if NBPFILTER > 0 426 *to_bpf = (ifp->if_bpf != 0); 427 #endif 428 /* We want to see multicasts. */ 429 if (eh->ether_dhost[0] & 1) 430 return (1); 431 432 /* We want to see our own packets */ 433 if (ether_equal(eh->ether_dhost, LLADDR(ifp->if_sadl))) 434 return (1); 435 436 /* Anything else goes to BPF but nothing else. */ 437 #if NBPFILTER > 0 438 if (*to_bpf) 439 *to_bpf = 2; 440 #endif 441 return (1); 442 443 default: 444 /* 445 * Only accept unicast packets destined for us, or multicasts 446 * for groups that we belong to. For now, we assume that the 447 * '586 will only return packets that we asked it for. This 448 * isn't strictly true (it uses hashing for the multicast 449 * filter), but it will do in this case, and we want to get 450 * out of here as quickly as possible. 451 */ 452 #if NBPFILTER > 0 453 *to_bpf = (ifp->if_bpf != 0); 454 #endif 455 return (1); 456 } 457 return (0); 458 } 459 460 static int 461 i82586_cmd_wait(sc) 462 struct ie_softc *sc; 463 { 464 /* spin on i82586 command acknowledge; wait at most 0.9 (!) seconds */ 465 int i, off; 466 467 for (i = 0; i < 900000; i++) { 468 /* Read the command word */ 469 off = IE_SCB_CMD(sc->scb); 470 bus_space_barrier(sc->bt, sc->bh, off, 2, 471 BUS_SPACE_BARRIER_READ); 472 if ((sc->ie_bus_read16)(sc, off) == 0) 473 return (0); 474 delay(1); 475 } 476 477 printf("i82586_cmd_wait: timo(%ssync): scb status: 0x%x\n", 478 sc->async_cmd_inprogress?"a":"", sc->ie_bus_read16(sc, off)); 479 return (1); /* Timeout */ 480 } 481 482 /* 483 * Send a command to the controller and wait for it to either complete 484 * or be accepted, depending on the command. If the command pointer 485 * is null, then pretend that the command is not an action command. 486 * If the command pointer is not null, and the command is an action 487 * command, wait for one of the MASK bits to turn on in the command's 488 * status field. 489 * If ASYNC is set, we just call the chip's attention and return. 490 * We may have to wait for the command's acceptance later though. 491 */ 492 static int 493 i82586_start_cmd(sc, cmd, iecmdbuf, mask, async) 494 struct ie_softc *sc; 495 int cmd; 496 int iecmdbuf; 497 int mask; 498 int async; 499 { 500 int i; 501 int off; 502 503 if (sc->async_cmd_inprogress != 0) { 504 /* 505 * If previous command was issued asynchronously, wait 506 * for it now. 507 */ 508 if (i82586_cmd_wait(sc) != 0) 509 return (1); 510 sc->async_cmd_inprogress = 0; 511 } 512 513 off = IE_SCB_CMD(sc->scb); 514 (sc->ie_bus_write16)(sc, off, cmd); 515 bus_space_barrier(sc->bt, sc->bh, off, 2, BUS_SPACE_BARRIER_WRITE); 516 (sc->chan_attn)(sc); 517 518 if (async != 0) { 519 sc->async_cmd_inprogress = 1; 520 return (0); 521 } 522 523 if (IE_ACTION_COMMAND(cmd) && iecmdbuf) { 524 int status; 525 /* 526 * Now spin-lock waiting for status. This is not a very nice 527 * thing to do, and can kill performance pretty well... 528 * According to the packet driver, the minimum timeout 529 * should be .369 seconds. 530 */ 531 for (i = 0; i < 369000; i++) { 532 /* Read the command status */ 533 off = IE_CMD_COMMON_STATUS(iecmdbuf); 534 bus_space_barrier(sc->bt, sc->bh, off, 2, 535 BUS_SPACE_BARRIER_READ); 536 status = (sc->ie_bus_read16)(sc, off); 537 if (status & mask) 538 return (0); 539 delay(1); 540 } 541 542 } else { 543 /* 544 * Otherwise, just wait for the command to be accepted. 545 */ 546 return (i82586_cmd_wait(sc)); 547 } 548 549 /* Timeout */ 550 return (1); 551 } 552 553 /* 554 * Interrupt Acknowledge. 555 */ 556 static __inline__ void 557 ie_ack(sc, mask) 558 struct ie_softc *sc; 559 u_int mask; /* in native byte-order */ 560 { 561 u_int status; 562 563 bus_space_barrier(sc->bt, sc->bh, 0, 0, BUS_SPACE_BARRIER_READ); 564 status = (sc->ie_bus_read16)(sc, IE_SCB_STATUS(sc->scb)); 565 i82586_start_cmd(sc, status & mask, 0, 0, 0); 566 } 567 568 /* 569 * Transfer accumulated chip error counters to IF. 570 */ 571 static __inline void 572 i82586_count_errors(sc) 573 struct ie_softc *sc; 574 { 575 int scb = sc->scb; 576 577 sc->sc_ethercom.ec_if.if_ierrors += 578 sc->ie_bus_read16(sc, IE_SCB_ERRCRC(scb)) + 579 sc->ie_bus_read16(sc, IE_SCB_ERRALN(scb)) + 580 sc->ie_bus_read16(sc, IE_SCB_ERRRES(scb)) + 581 sc->ie_bus_read16(sc, IE_SCB_ERROVR(scb)); 582 583 /* Clear error counters */ 584 sc->ie_bus_write16(sc, IE_SCB_ERRCRC(scb), 0); 585 sc->ie_bus_write16(sc, IE_SCB_ERRALN(scb), 0); 586 sc->ie_bus_write16(sc, IE_SCB_ERRRES(scb), 0); 587 sc->ie_bus_write16(sc, IE_SCB_ERROVR(scb), 0); 588 } 589 590 static void 591 i82586_rx_errors(sc, fn, status) 592 struct ie_softc *sc; 593 int fn; 594 int status; 595 { 596 char bits[128]; 597 598 log(LOG_ERR, "%s: rx error (frame# %d): %s\n", sc->sc_dev.dv_xname, fn, 599 bitmask_snprintf(status, IE_FD_STATUSBITS, bits, sizeof(bits))); 600 } 601 602 /* 603 * i82586 interrupt entry point. 604 */ 605 int 606 i82586_intr(v) 607 void *v; 608 { 609 struct ie_softc *sc = v; 610 u_int status; 611 int off; 612 613 /* 614 * Implementation dependent interrupt handling. 615 */ 616 if (sc->intrhook) 617 (sc->intrhook)(sc, INTR_ENTER); 618 619 off = IE_SCB_STATUS(sc->scb); 620 bus_space_barrier(sc->bt, sc->bh, off, 2, BUS_SPACE_BARRIER_READ); 621 status = sc->ie_bus_read16(sc, off) & IE_ST_WHENCE; 622 623 if ((status & IE_ST_WHENCE) == 0) { 624 #ifdef I82586_DEBUG 625 if ((spurious_intrs++ % 25) == 0) 626 printf("%s: i82586_intr: %d spurious interrupts\n", 627 sc->sc_dev.dv_xname, spurious_intrs); 628 #endif 629 if (sc->intrhook) 630 (sc->intrhook)(sc, INTR_EXIT); 631 632 return (0); 633 } 634 635 loop: 636 /* Ack interrupts FIRST in case we receive more during the ISR. */ 637 #if 0 638 ie_ack(sc, status & IE_ST_WHENCE); 639 #endif 640 i82586_start_cmd(sc, status & IE_ST_WHENCE, 0, 0, 1); 641 642 if (status & (IE_ST_FR | IE_ST_RNR)) 643 if (i82586_rint(sc, status) != 0) 644 goto reset; 645 646 if (status & IE_ST_CX) 647 if (i82586_tint(sc, status) != 0) 648 goto reset; 649 650 #ifdef I82586_DEBUG 651 if ((status & IE_ST_CNA) && (sc->sc_debug & IED_CNA)) 652 printf("%s: cna; status=0x%x\n", sc->sc_dev.dv_xname, status); 653 #endif 654 if (sc->intrhook) 655 (sc->intrhook)(sc, INTR_LOOP); 656 657 /* 658 * Interrupt ACK was posted asynchronously; wait for 659 * completion here before reading SCB status again. 660 */ 661 i82586_cmd_wait(sc); 662 663 bus_space_barrier(sc->bt, sc->bh, off, 2, BUS_SPACE_BARRIER_READ); 664 status = sc->ie_bus_read16(sc, off); 665 if ((status & IE_ST_WHENCE) != 0) 666 goto loop; 667 668 out: 669 if (sc->intrhook) 670 (sc->intrhook)(sc, INTR_EXIT); 671 return (1); 672 673 reset: 674 i82586_cmd_wait(sc); 675 i82586_reset(sc, 1); 676 goto out; 677 678 } 679 680 /* 681 * Process a received-frame interrupt. 682 */ 683 int 684 i82586_rint(sc, scbstatus) 685 struct ie_softc *sc; 686 int scbstatus; 687 { 688 static int timesthru = 1024; 689 int i, status, off; 690 691 #ifdef I82586_DEBUG 692 if (sc->sc_debug & IED_RINT) 693 printf("%s: rint: status 0x%x\n", 694 sc->sc_dev.dv_xname, scbstatus); 695 #endif 696 697 for (;;) { 698 int drop = 0; 699 700 i = sc->rfhead; 701 off = IE_RFRAME_STATUS(sc->rframes, i); 702 bus_space_barrier(sc->bt, sc->bh, off, 2, 703 BUS_SPACE_BARRIER_READ); 704 status = sc->ie_bus_read16(sc, off); 705 706 #ifdef I82586_DEBUG 707 if (sc->sc_debug & IED_RINT) 708 printf("%s: rint: frame(%d) status 0x%x\n", 709 sc->sc_dev.dv_xname, i, status); 710 #endif 711 if ((status & IE_FD_COMPLETE) == 0) { 712 if ((status & IE_FD_OK) != 0) { 713 printf("%s: rint: weird: ", 714 sc->sc_dev.dv_xname); 715 i82586_rx_errors(sc, i, status); 716 break; 717 } 718 if (--timesthru == 0) { 719 /* Account the accumulated errors */ 720 i82586_count_errors(sc); 721 timesthru = 1024; 722 } 723 break; 724 } else if ((status & IE_FD_OK) == 0) { 725 /* 726 * If the chip is configured to automatically 727 * discard bad frames, the only reason we can 728 * get here is an "out-of-resource" condition. 729 */ 730 i82586_rx_errors(sc, i, status); 731 drop = 1; 732 } 733 734 #ifdef I82586_DEBUG 735 if ((status & IE_FD_BUSY) != 0) 736 printf("%s: rint: frame(%d) busy; status=0x%x\n", 737 sc->sc_dev.dv_xname, i, status); 738 #endif 739 740 741 /* 742 * Advance the RFD list, since we're done with 743 * this descriptor. 744 */ 745 746 /* Clear frame status */ 747 sc->ie_bus_write16(sc, off, 0); 748 749 /* Put fence at this frame (the head) */ 750 off = IE_RFRAME_LAST(sc->rframes, i); 751 sc->ie_bus_write16(sc, off, IE_FD_EOL|IE_FD_SUSP); 752 753 /* and clear RBD field */ 754 off = IE_RFRAME_BUFDESC(sc->rframes, i); 755 sc->ie_bus_write16(sc, off, 0xffff); 756 757 /* Remove fence from current tail */ 758 off = IE_RFRAME_LAST(sc->rframes, sc->rftail); 759 sc->ie_bus_write16(sc, off, 0); 760 761 if (++sc->rftail == sc->nframes) 762 sc->rftail = 0; 763 if (++sc->rfhead == sc->nframes) 764 sc->rfhead = 0; 765 766 /* Pull the frame off the board */ 767 if (drop) { 768 i82586_drop_frames(sc); 769 if ((status & IE_FD_RNR) != 0) 770 sc->rnr_expect = 1; 771 sc->sc_ethercom.ec_if.if_ierrors++; 772 } else if (ie_readframe(sc, i) != 0) 773 return (1); 774 } 775 776 if ((scbstatus & IE_ST_RNR) != 0) { 777 778 /* 779 * Receiver went "Not Ready". We try to figure out 780 * whether this was an expected event based on past 781 * frame status values. 782 */ 783 784 if ((scbstatus & IE_RUS_SUSPEND) != 0) { 785 /* 786 * We use the "suspend on last frame" flag. 787 * Send a RU RESUME command in response, since 788 * we should have dealt with all completed frames 789 * by now. 790 */ 791 printf("RINT: SUSPENDED; scbstatus=0x%x\n", 792 scbstatus); 793 if (i82586_start_cmd(sc, IE_RUC_RESUME, 0, 0, 0) == 0) 794 return (0); 795 printf("%s: RU RESUME command timed out\n", 796 sc->sc_dev.dv_xname); 797 return (1); /* Ask for a reset */ 798 } 799 800 if (sc->rnr_expect != 0) { 801 /* 802 * The RNR condition was announced in the previously 803 * completed frame. Assume the receive ring is Ok, 804 * so restart the receiver without further delay. 805 */ 806 i82586_start_transceiver(sc); 807 sc->rnr_expect = 0; 808 return (0); 809 810 } else if ((scbstatus & IE_RUS_NOSPACE) != 0) { 811 /* 812 * We saw no previous IF_FD_RNR flag. 813 * We check our ring invariants and, if ok, 814 * just restart the receiver at the current 815 * point in the ring. 816 */ 817 if (i82586_chk_rx_ring(sc) != 0) 818 return (1); 819 820 i82586_start_transceiver(sc); 821 sc->sc_ethercom.ec_if.if_ierrors++; 822 return (0); 823 } else 824 printf("%s: receiver not ready; scbstatus=0x%x\n", 825 sc->sc_dev.dv_xname, scbstatus); 826 827 sc->sc_ethercom.ec_if.if_ierrors++; 828 return (1); /* Ask for a reset */ 829 } 830 831 return (0); 832 } 833 834 /* 835 * Process a command-complete interrupt. These are only generated by the 836 * transmission of frames. This routine is deceptively simple, since most 837 * of the real work is done by i82586_start(). 838 */ 839 int 840 i82586_tint(sc, scbstatus) 841 struct ie_softc *sc; 842 int scbstatus; 843 { 844 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 845 int status; 846 847 ifp->if_timer = 0; 848 ifp->if_flags &= ~IFF_OACTIVE; 849 850 #ifdef I82586_DEBUG 851 if (sc->xmit_busy <= 0) { 852 printf("i82586_tint: WEIRD: xmit_busy=%d, xctail=%d, xchead=%d\n", 853 sc->xmit_busy, sc->xctail, sc->xchead); 854 return (0); 855 } 856 #endif 857 858 status = sc->ie_bus_read16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, 859 sc->xctail)); 860 861 #ifdef I82586_DEBUG 862 if (sc->sc_debug & IED_TINT) 863 printf("%s: tint: SCB status 0x%x; xmit status 0x%x\n", 864 sc->sc_dev.dv_xname, scbstatus, status); 865 #endif 866 867 if ((status & IE_STAT_COMPL) == 0 || (status & IE_STAT_BUSY)) { 868 printf("i82586_tint: command still busy; status=0x%x; tail=%d\n", 869 status, sc->xctail); 870 printf("iestatus = 0x%x\n", scbstatus); 871 } 872 873 if (status & IE_STAT_OK) { 874 ifp->if_opackets++; 875 ifp->if_collisions += (status & IE_XS_MAXCOLL); 876 } else { 877 ifp->if_oerrors++; 878 /* 879 * Check SQE and DEFERRED? 880 * What if more than one bit is set? 881 */ 882 if (status & IE_STAT_ABORT) 883 printf("%s: send aborted\n", sc->sc_dev.dv_xname); 884 else if (status & IE_XS_NOCARRIER) 885 printf("%s: no carrier\n", sc->sc_dev.dv_xname); 886 else if (status & IE_XS_LOSTCTS) 887 printf("%s: lost CTS\n", sc->sc_dev.dv_xname); 888 else if (status & IE_XS_UNDERRUN) 889 printf("%s: DMA underrun\n", sc->sc_dev.dv_xname); 890 else if (status & IE_XS_EXCMAX) { 891 printf("%s: too many collisions\n", 892 sc->sc_dev.dv_xname); 893 sc->sc_ethercom.ec_if.if_collisions += 16; 894 } 895 } 896 897 /* 898 * If multicast addresses were added or deleted while transmitting, 899 * ie_mc_reset() set the want_mcsetup flag indicating that we 900 * should do it. 901 */ 902 if (sc->want_mcsetup) { 903 ie_mc_setup(sc, IE_XBUF_ADDR(sc, sc->xctail)); 904 sc->want_mcsetup = 0; 905 } 906 907 /* Done with the buffer. */ 908 sc->xmit_busy--; 909 sc->xctail = (sc->xctail + 1) % NTXBUF; 910 911 /* Start the next packet, if any, transmitting. */ 912 if (sc->xmit_busy > 0) 913 iexmit(sc); 914 915 i82586_start(ifp); 916 return (0); 917 } 918 919 /* 920 * Get a range of receive buffer descriptors that represent one packet. 921 */ 922 static int 923 i82586_get_rbd_list(sc, start, end, pktlen) 924 struct ie_softc *sc; 925 u_int16_t *start; 926 u_int16_t *end; 927 int *pktlen; 928 { 929 int off, rbbase = sc->rbds; 930 int rbindex, count = 0; 931 int plen = 0; 932 int rbdstatus; 933 934 *start = rbindex = sc->rbhead; 935 936 do { 937 off = IE_RBD_STATUS(rbbase, rbindex); 938 bus_space_barrier(sc->bt, sc->bh, off, 2, 939 BUS_SPACE_BARRIER_READ); 940 rbdstatus = sc->ie_bus_read16(sc, off); 941 if ((rbdstatus & IE_RBD_USED) == 0) { 942 /* 943 * This means we are somehow out of sync. So, we 944 * reset the adapter. 945 */ 946 #ifdef I82586_DEBUG 947 print_rbd(sc, rbindex); 948 #endif 949 log(LOG_ERR, 950 "%s: receive descriptors out of sync at %d\n", 951 sc->sc_dev.dv_xname, rbindex); 952 return (0); 953 } 954 plen += (rbdstatus & IE_RBD_CNTMASK); 955 956 if (++rbindex == sc->nrxbuf) 957 rbindex = 0; 958 959 ++count; 960 } while ((rbdstatus & IE_RBD_LAST) == 0); 961 *end = rbindex; 962 *pktlen = plen; 963 return (count); 964 } 965 966 967 /* 968 * Release a range of receive buffer descriptors after we've copied the packet. 969 */ 970 static void 971 i82586_release_rbd_list(sc, start, end) 972 struct ie_softc *sc; 973 u_int16_t start; 974 u_int16_t end; 975 { 976 int off, rbbase = sc->rbds; 977 int rbindex = start; 978 979 do { 980 /* Clear buffer status */ 981 off = IE_RBD_STATUS(rbbase, rbindex); 982 sc->ie_bus_write16(sc, off, 0); 983 if (++rbindex == sc->nrxbuf) 984 rbindex = 0; 985 } while (rbindex != end); 986 987 /* Mark EOL at new tail */ 988 rbindex = ((rbindex == 0) ? sc->nrxbuf : rbindex) - 1; 989 off = IE_RBD_BUFLEN(rbbase, rbindex); 990 sc->ie_bus_write16(sc, off, IE_RBUF_SIZE|IE_RBD_EOL); 991 992 /* Remove EOL from current tail */ 993 off = IE_RBD_BUFLEN(rbbase, sc->rbtail); 994 sc->ie_bus_write16(sc, off, IE_RBUF_SIZE); 995 996 /* New head & tail pointer */ 997 /* hmm, why have both? head is always (tail + 1) % NRXBUF */ 998 sc->rbhead = end; 999 sc->rbtail = rbindex; 1000 } 1001 1002 /* 1003 * Drop the packet at the head of the RX buffer ring. 1004 * Called if the frame descriptor reports an error on this packet. 1005 * Returns 1 if the buffer descriptor ring appears to be corrupt; 1006 * and 0 otherwise. 1007 */ 1008 static int 1009 i82586_drop_frames(sc) 1010 struct ie_softc *sc; 1011 { 1012 u_int16_t bstart, bend; 1013 int pktlen; 1014 1015 if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) 1016 return (1); 1017 i82586_release_rbd_list(sc, bstart, bend); 1018 return (0); 1019 } 1020 1021 /* 1022 * Check the RX frame & buffer descriptor lists for our invariants, 1023 * i.e.: EOL bit set iff. it is pointed at by the r*tail pointer. 1024 * 1025 * Called when the receive unit has stopped unexpectedly. 1026 * Returns 1 if an inconsistency is detected; 0 otherwise. 1027 * 1028 * The Receive Unit is expected to be NOT RUNNING. 1029 */ 1030 static int 1031 i82586_chk_rx_ring(sc) 1032 struct ie_softc *sc; 1033 { 1034 int n, off, val; 1035 1036 for (n = 0; n < sc->nrxbuf; n++) { 1037 off = IE_RBD_BUFLEN(sc->rbds, n); 1038 val = sc->ie_bus_read16(sc, off); 1039 if ((n == sc->rbtail) ^ ((val & IE_RBD_EOL) != 0)) { 1040 /* `rbtail' and EOL flag out of sync */ 1041 log(LOG_ERR, 1042 "%s: rx buffer descriptors out of sync at %d\n", 1043 sc->sc_dev.dv_xname, n); 1044 return (1); 1045 } 1046 1047 /* Take the opportunity to clear the status fields here ? */ 1048 } 1049 1050 for (n = 0; n < sc->nframes; n++) { 1051 off = IE_RFRAME_LAST(sc->rframes, n); 1052 val = sc->ie_bus_read16(sc, off); 1053 if ((n == sc->rftail) ^ ((val & (IE_FD_EOL|IE_FD_SUSP)) != 0)) { 1054 /* `rftail' and EOL flag out of sync */ 1055 log(LOG_ERR, 1056 "%s: rx frame list out of sync at %d\n", 1057 sc->sc_dev.dv_xname, n); 1058 return (1); 1059 } 1060 } 1061 1062 return (0); 1063 } 1064 1065 /* 1066 * Read data off the interface, and turn it into an mbuf chain. 1067 * 1068 * This code is DRAMATICALLY different from the previous version; this 1069 * version tries to allocate the entire mbuf chain up front, given the 1070 * length of the data available. This enables us to allocate mbuf 1071 * clusters in many situations where before we would have had a long 1072 * chain of partially-full mbufs. This should help to speed up the 1073 * operation considerably. (Provided that it works, of course.) 1074 */ 1075 static __inline struct mbuf * 1076 ieget(sc, to_bpf, head, totlen) 1077 struct ie_softc *sc; 1078 int *to_bpf; 1079 int head; 1080 int totlen; 1081 { 1082 struct mbuf *m, *m0, *newm; 1083 int len, resid; 1084 int thisrboff, thismboff; 1085 struct ether_header eh; 1086 1087 /* 1088 * Snarf the Ethernet header. 1089 */ 1090 (sc->memcopyin)(sc, &eh, IE_RBUF_ADDR(sc, head), 1091 sizeof(struct ether_header)); 1092 1093 /* 1094 * As quickly as possible, check if this packet is for us. 1095 * If not, don't waste a single cycle copying the rest of the 1096 * packet in. 1097 * This is only a consideration when FILTER is defined; i.e., when 1098 * we are either running BPF or doing multicasting. 1099 */ 1100 if (!check_eh(sc, &eh, to_bpf)) { 1101 /* just this case, it's not an error */ 1102 sc->sc_ethercom.ec_if.if_ierrors--; 1103 return (0); 1104 } 1105 1106 resid = totlen; 1107 1108 MGETHDR(m0, M_DONTWAIT, MT_DATA); 1109 if (m0 == 0) 1110 return (0); 1111 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 1112 m0->m_pkthdr.len = totlen; 1113 len = MHLEN; 1114 m = m0; 1115 1116 /* 1117 * This loop goes through and allocates mbufs for all the data we will 1118 * be copying in. It does not actually do the copying yet. 1119 */ 1120 while (totlen > 0) { 1121 if (totlen >= MINCLSIZE) { 1122 MCLGET(m, M_DONTWAIT); 1123 if ((m->m_flags & M_EXT) == 0) 1124 goto bad; 1125 len = MCLBYTES; 1126 } 1127 1128 m->m_len = len = min(totlen, len); 1129 1130 totlen -= len; 1131 if (totlen > 0) { 1132 MGET(newm, M_DONTWAIT, MT_DATA); 1133 if (newm == 0) 1134 goto bad; 1135 len = MLEN; 1136 m = m->m_next = newm; 1137 } 1138 } 1139 1140 m = m0; 1141 thismboff = 0; 1142 1143 /* 1144 * Copy the Ethernet header into the mbuf chain. 1145 */ 1146 memcpy(mtod(m, caddr_t), &eh, sizeof(struct ether_header)); 1147 thismboff = sizeof(struct ether_header); 1148 thisrboff = sizeof(struct ether_header); 1149 resid -= sizeof(struct ether_header); 1150 1151 /* 1152 * Now we take the mbuf chain (hopefully only one mbuf most of the 1153 * time) and stuff the data into it. There are no possible failures 1154 * at or after this point. 1155 */ 1156 while (resid > 0) { 1157 int thisrblen = IE_RBUF_SIZE - thisrboff, 1158 thismblen = m->m_len - thismboff; 1159 len = min(thisrblen, thismblen); 1160 1161 (sc->memcopyin)(sc, mtod(m, caddr_t) + thismboff, 1162 IE_RBUF_ADDR(sc,head) + thisrboff, 1163 (u_int)len); 1164 resid -= len; 1165 1166 if (len == thismblen) { 1167 m = m->m_next; 1168 thismboff = 0; 1169 } else 1170 thismboff += len; 1171 1172 if (len == thisrblen) { 1173 if (++head == sc->nrxbuf) 1174 head = 0; 1175 thisrboff = 0; 1176 } else 1177 thisrboff += len; 1178 } 1179 1180 /* 1181 * Unless something changed strangely while we were doing the copy, 1182 * we have now copied everything in from the shared memory. 1183 * This means that we are done. 1184 */ 1185 return (m0); 1186 1187 bad: 1188 m_freem(m0); 1189 return (0); 1190 } 1191 1192 /* 1193 * Read frame NUM from unit UNIT (pre-cached as IE). 1194 * 1195 * This routine reads the RFD at NUM, and copies in the buffers from the list 1196 * of RBD, then rotates the RBD list so that the receiver doesn't start 1197 * complaining. Trailers are DROPPED---there's no point in wasting time 1198 * on confusing code to deal with them. Hopefully, this machine will 1199 * never ARP for trailers anyway. 1200 */ 1201 static int 1202 ie_readframe(sc, num) 1203 struct ie_softc *sc; 1204 int num; /* frame number to read */ 1205 { 1206 struct mbuf *m; 1207 u_int16_t bstart, bend; 1208 int pktlen; 1209 #if NBPFILTER > 0 1210 int bpf_gets_it = 0; 1211 #endif 1212 1213 if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) { 1214 sc->sc_ethercom.ec_if.if_ierrors++; 1215 return (1); 1216 } 1217 1218 #if NBPFILTER > 0 1219 m = ieget(sc, &bpf_gets_it, bstart, pktlen); 1220 #else 1221 m = ieget(sc, 0, bstart, pktlen); 1222 #endif 1223 i82586_release_rbd_list(sc, bstart, bend); 1224 1225 if (m == 0) { 1226 sc->sc_ethercom.ec_if.if_ierrors++; 1227 return (0); 1228 } 1229 1230 #ifdef I82586_DEBUG 1231 if (sc->sc_debug & IED_READFRAME) { 1232 struct ether_header *eh = mtod(m, struct ether_header *); 1233 1234 printf("%s: frame from ether %s type 0x%x len %d\n", 1235 sc->sc_dev.dv_xname, 1236 ether_sprintf(eh->ether_shost), 1237 (u_int)eh->ether_type, 1238 pktlen); 1239 } 1240 #endif 1241 1242 #if NBPFILTER > 0 1243 /* 1244 * Check for a BPF filter; if so, hand it up. 1245 * Note that we have to stick an extra mbuf up front, because bpf_mtap 1246 * expects to have the ether header at the front. 1247 * It doesn't matter that this results in an ill-formatted mbuf chain, 1248 * since BPF just looks at the data. (It doesn't try to free the mbuf, 1249 * tho' it will make a copy for tcpdump.) 1250 */ 1251 if (bpf_gets_it) { 1252 /* Pass it up. */ 1253 bpf_mtap(sc->sc_ethercom.ec_if.if_bpf, m); 1254 1255 /* 1256 * A signal passed up from the filtering code indicating that 1257 * the packet is intended for BPF but not for the protocol 1258 * machinery. We can save a few cycles by not handing it 1259 * off to them. 1260 */ 1261 if (bpf_gets_it == 2) { 1262 m_freem(m); 1263 return (0); 1264 } 1265 } 1266 #endif /* NBPFILTER > 0 */ 1267 1268 /* 1269 * Finally pass this packet up to higher layers. 1270 */ 1271 (*sc->sc_ethercom.ec_if.if_input)(&sc->sc_ethercom.ec_if, m); 1272 sc->sc_ethercom.ec_if.if_ipackets++; 1273 return (0); 1274 } 1275 1276 1277 /* 1278 * Setup all necessary artifacts for an XMIT command, and then pass the XMIT 1279 * command to the chip to be executed. 1280 */ 1281 static __inline__ void 1282 iexmit(sc) 1283 struct ie_softc *sc; 1284 { 1285 int off; 1286 int cur, prev; 1287 1288 cur = sc->xctail; 1289 1290 #ifdef I82586_DEBUG 1291 if (sc->sc_debug & IED_XMIT) 1292 printf("%s: xmit buffer %d\n", sc->sc_dev.dv_xname, cur); 1293 #endif 1294 1295 /* 1296 * Setup the transmit command. 1297 */ 1298 sc->ie_bus_write16(sc, IE_CMD_XMIT_DESC(sc->xmit_cmds, cur), 1299 IE_XBD_ADDR(sc->xbds, cur)); 1300 1301 sc->ie_bus_write16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, cur), 0); 1302 1303 if (sc->do_xmitnopchain) { 1304 /* 1305 * Gate this XMIT command to the following NOP 1306 */ 1307 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds, cur), 1308 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1309 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1310 IE_CMD_XMIT | IE_CMD_INTR); 1311 1312 /* 1313 * Loopback at following NOP 1314 */ 1315 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, cur), 0); 1316 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur), 1317 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1318 1319 /* 1320 * Gate preceding NOP to this XMIT command 1321 */ 1322 prev = (cur + NTXBUF - 1) % NTXBUF; 1323 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, prev), 0); 1324 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev), 1325 IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1326 1327 off = IE_SCB_STATUS(sc->scb); 1328 bus_space_barrier(sc->bt, sc->bh, off, 2, 1329 BUS_SPACE_BARRIER_READ); 1330 if ((sc->ie_bus_read16(sc, off) & IE_CUS_ACTIVE) == 0) { 1331 printf("iexmit: CU not active\n"); 1332 i82586_start_transceiver(sc); 1333 } 1334 } else { 1335 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds,cur), 1336 0xffff); 1337 1338 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1339 IE_CMD_XMIT | IE_CMD_INTR | IE_CMD_LAST); 1340 1341 off = IE_SCB_CMDLST(sc->scb); 1342 sc->ie_bus_write16(sc, off, IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1343 bus_space_barrier(sc->bt, sc->bh, off, 2, 1344 BUS_SPACE_BARRIER_WRITE); 1345 1346 if (i82586_start_cmd(sc, IE_CUC_START, 0, 0, 1)) 1347 printf("%s: iexmit: start xmit command timed out\n", 1348 sc->sc_dev.dv_xname); 1349 } 1350 1351 sc->sc_ethercom.ec_if.if_timer = 5; 1352 } 1353 1354 1355 /* 1356 * Start transmission on an interface. 1357 */ 1358 void 1359 i82586_start(ifp) 1360 struct ifnet *ifp; 1361 { 1362 struct ie_softc *sc = ifp->if_softc; 1363 struct mbuf *m0, *m; 1364 int buffer, head, xbase; 1365 u_short len; 1366 int s; 1367 1368 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 1369 return; 1370 1371 for (;;) { 1372 if (sc->xmit_busy == NTXBUF) { 1373 ifp->if_flags |= IFF_OACTIVE; 1374 break; 1375 } 1376 1377 head = sc->xchead; 1378 xbase = sc->xbds; 1379 1380 IF_DEQUEUE(&ifp->if_snd, m0); 1381 if (m0 == 0) 1382 break; 1383 1384 /* We need to use m->m_pkthdr.len, so require the header */ 1385 if ((m0->m_flags & M_PKTHDR) == 0) 1386 panic("i82586_start: no header mbuf"); 1387 1388 #if NBPFILTER > 0 1389 /* Tap off here if there is a BPF listener. */ 1390 if (ifp->if_bpf) 1391 bpf_mtap(ifp->if_bpf, m0); 1392 #endif 1393 1394 #ifdef I82586_DEBUG 1395 if (sc->sc_debug & IED_ENQ) 1396 printf("%s: fill buffer %d\n", sc->sc_dev.dv_xname, 1397 sc->xchead); 1398 #endif 1399 1400 if (m0->m_pkthdr.len > IE_TBUF_SIZE) 1401 printf("%s: tbuf overflow\n", sc->sc_dev.dv_xname); 1402 1403 buffer = IE_XBUF_ADDR(sc, head); 1404 for (m = m0; m != 0; m = m->m_next) { 1405 (sc->memcopyout)(sc, mtod(m,caddr_t), buffer, m->m_len); 1406 buffer += m->m_len; 1407 } 1408 1409 len = max(m0->m_pkthdr.len, ETHER_MIN_LEN); 1410 m_freem(m0); 1411 1412 /* 1413 * Setup the transmit buffer descriptor here, while we 1414 * know the packet's length. 1415 */ 1416 sc->ie_bus_write16(sc, IE_XBD_FLAGS(xbase, head), 1417 len | IE_TBD_EOL); 1418 sc->ie_bus_write16(sc, IE_XBD_NEXT(xbase, head), 0xffff); 1419 sc->ie_bus_write24(sc, IE_XBD_BUF(xbase, head), 1420 IE_XBUF_ADDR(sc, head)); 1421 1422 if (++head == NTXBUF) 1423 head = 0; 1424 sc->xchead = head; 1425 1426 s = splnet(); 1427 /* Start the first packet transmitting. */ 1428 if (sc->xmit_busy == 0) 1429 iexmit(sc); 1430 1431 sc->xmit_busy++; 1432 splx(s); 1433 } 1434 } 1435 1436 /* 1437 * Probe IE's ram setup [ Move all this into MD front-end!? ] 1438 * Use only if SCP and ISCP represent offsets into shared ram space. 1439 */ 1440 int 1441 i82586_proberam(sc) 1442 struct ie_softc *sc; 1443 { 1444 int result, off; 1445 1446 /* Put in 16-bit mode */ 1447 off = IE_SCP_BUS_USE(sc->scp); 1448 bus_space_write_1(sc->bt, sc->bh, off, 0); 1449 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_WRITE); 1450 1451 /* Set the ISCP `busy' bit */ 1452 off = IE_ISCP_BUSY(sc->iscp); 1453 bus_space_write_1(sc->bt, sc->bh, off, 1); 1454 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_WRITE); 1455 1456 if (sc->hwreset) 1457 (sc->hwreset)(sc, CHIP_PROBE); 1458 1459 (sc->chan_attn) (sc); 1460 1461 delay(100); /* wait a while... */ 1462 1463 /* Read back the ISCP `busy' bit; it should be clear by now */ 1464 off = IE_ISCP_BUSY(sc->iscp); 1465 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_READ); 1466 result = bus_space_read_1(sc->bt, sc->bh, off) == 0; 1467 1468 /* Acknowledge any interrupts we may have caused. */ 1469 ie_ack(sc, IE_ST_WHENCE); 1470 1471 return (result); 1472 } 1473 1474 void 1475 i82586_reset(sc, hard) 1476 struct ie_softc *sc; 1477 int hard; 1478 { 1479 int s = splnet(); 1480 1481 if (hard) 1482 printf("%s: reset\n", sc->sc_dev.dv_xname); 1483 1484 /* Clear OACTIVE in case we're called from watchdog (frozen xmit). */ 1485 sc->sc_ethercom.ec_if.if_timer = 0; 1486 sc->sc_ethercom.ec_if.if_flags &= ~IFF_OACTIVE; 1487 1488 /* 1489 * Stop i82586 dead in its tracks. 1490 */ 1491 if (i82586_start_cmd(sc, IE_RUC_ABORT | IE_CUC_ABORT, 0, 0, 0)) 1492 printf("%s: abort commands timed out\n", sc->sc_dev.dv_xname); 1493 1494 /* 1495 * This can really slow down the i82586_reset() on some cards, but it's 1496 * necessary to unwedge other ones (eg, the Sun VME ones) from certain 1497 * lockups. 1498 */ 1499 if (hard && sc->hwreset) 1500 (sc->hwreset)(sc, CARD_RESET); 1501 1502 delay(100); 1503 ie_ack(sc, IE_ST_WHENCE); 1504 1505 if ((sc->sc_ethercom.ec_if.if_flags & IFF_UP) != 0) { 1506 int retries=0; /* XXX - find out why init sometimes fails */ 1507 while (retries++ < 2) 1508 if (i82586_init(sc) == 1) 1509 break; 1510 } 1511 1512 splx(s); 1513 } 1514 1515 1516 static void 1517 setup_simple_command(sc, cmd, cmdbuf) 1518 struct ie_softc *sc; 1519 int cmd; 1520 int cmdbuf; 1521 { 1522 /* Setup a simple command */ 1523 sc->ie_bus_write16(sc, IE_CMD_COMMON_STATUS(cmdbuf), 0); 1524 sc->ie_bus_write16(sc, IE_CMD_COMMON_CMD(cmdbuf), cmd | IE_CMD_LAST); 1525 sc->ie_bus_write16(sc, IE_CMD_COMMON_LINK(cmdbuf), 0xffff); 1526 1527 /* Assign the command buffer to the SCB command list */ 1528 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), cmdbuf); 1529 } 1530 1531 /* 1532 * Run the time-domain reflectometer. 1533 */ 1534 static void 1535 ie_run_tdr(sc, cmd) 1536 struct ie_softc *sc; 1537 int cmd; 1538 { 1539 int result; 1540 1541 setup_simple_command(sc, IE_CMD_TDR, cmd); 1542 (sc->ie_bus_write16)(sc, IE_CMD_TDR_TIME(cmd), 0); 1543 1544 if (i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0) || 1545 (sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)) & IE_STAT_OK) == 0) 1546 result = 0x10000; /* XXX */ 1547 else 1548 result = sc->ie_bus_read16(sc, IE_CMD_TDR_TIME(cmd)); 1549 1550 /* Squash any pending interrupts */ 1551 ie_ack(sc, IE_ST_WHENCE); 1552 1553 if (result & IE_TDR_SUCCESS) 1554 return; 1555 1556 if (result & 0x10000) 1557 printf("%s: TDR command failed\n", sc->sc_dev.dv_xname); 1558 else if (result & IE_TDR_XCVR) 1559 printf("%s: transceiver problem\n", sc->sc_dev.dv_xname); 1560 else if (result & IE_TDR_OPEN) 1561 printf("%s: TDR detected an open %d clocks away\n", 1562 sc->sc_dev.dv_xname, result & IE_TDR_TIME); 1563 else if (result & IE_TDR_SHORT) 1564 printf("%s: TDR detected a short %d clocks away\n", 1565 sc->sc_dev.dv_xname, result & IE_TDR_TIME); 1566 else 1567 printf("%s: TDR returned unknown status 0x%x\n", 1568 sc->sc_dev.dv_xname, result); 1569 } 1570 1571 1572 /* 1573 * i82586_setup_bufs: set up the buffers 1574 * 1575 * We have a block of KVA at sc->buf_area which is of size sc->buf_area_sz. 1576 * this is to be used for the buffers. The chip indexs its control data 1577 * structures with 16 bit offsets, and it indexes actual buffers with 1578 * 24 bit addresses. So we should allocate control buffers first so that 1579 * we don't overflow the 16 bit offset field. The number of transmit 1580 * buffers is fixed at compile time. 1581 * 1582 */ 1583 static void 1584 i82586_setup_bufs(sc) 1585 struct ie_softc *sc; 1586 { 1587 int ptr = sc->buf_area; /* memory pool */ 1588 int n, r; 1589 1590 /* 1591 * step 0: zero memory and figure out how many recv buffers and 1592 * frames we can have. 1593 */ 1594 ptr = (ptr + 3) & ~3; /* set alignment and stick with it */ 1595 1596 1597 /* 1598 * step 1: lay out data structures in the shared-memory area 1599 */ 1600 1601 /* The no-op commands; used if "nop-chaining" is in effect */ 1602 sc->nop_cmds = ptr; 1603 ptr += NTXBUF * IE_CMD_NOP_SZ; 1604 1605 /* The transmit commands */ 1606 sc->xmit_cmds = ptr; 1607 ptr += NTXBUF * IE_CMD_XMIT_SZ; 1608 1609 /* The transmit buffers descriptors */ 1610 sc->xbds = ptr; 1611 ptr += NTXBUF * IE_XBD_SZ; 1612 1613 /* The transmit buffers */ 1614 sc->xbufs = ptr; 1615 ptr += NTXBUF * IE_TBUF_SIZE; 1616 1617 ptr = (ptr + 3) & ~3; /* re-align.. just in case */ 1618 1619 /* Compute free space for RECV stuff */ 1620 n = sc->buf_area_sz - (ptr - sc->buf_area); 1621 1622 /* Compute size of one RECV frame */ 1623 r = IE_RFRAME_SZ + ((IE_RBD_SZ + IE_RBUF_SIZE) * B_PER_F); 1624 1625 sc->nframes = n / r; 1626 1627 if (sc->nframes <= 0) 1628 panic("ie: bogus buffer calc\n"); 1629 1630 sc->nrxbuf = sc->nframes * B_PER_F; 1631 1632 /* The receice frame descriptors */ 1633 sc->rframes = ptr; 1634 ptr += sc->nframes * IE_RFRAME_SZ; 1635 1636 /* The receive buffer descriptors */ 1637 sc->rbds = ptr; 1638 ptr += sc->nrxbuf * IE_RBD_SZ; 1639 1640 /* The receive buffers */ 1641 sc->rbufs = ptr; 1642 ptr += sc->nrxbuf * IE_RBUF_SIZE; 1643 1644 #ifdef I82586_DEBUG 1645 printf("%s: %d frames %d bufs\n", sc->sc_dev.dv_xname, sc->nframes, 1646 sc->nrxbuf); 1647 #endif 1648 1649 /* 1650 * step 2: link together the recv frames and set EOL on last one 1651 */ 1652 for (n = 0; n < sc->nframes; n++) { 1653 int m = (n == sc->nframes - 1) ? 0 : n + 1; 1654 1655 /* Clear status */ 1656 sc->ie_bus_write16(sc, IE_RFRAME_STATUS(sc->rframes,n), 0); 1657 1658 /* RBD link = NULL */ 1659 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,n), 1660 0xffff); 1661 1662 /* Make a circular list */ 1663 sc->ie_bus_write16(sc, IE_RFRAME_NEXT(sc->rframes,n), 1664 IE_RFRAME_ADDR(sc->rframes,m)); 1665 1666 /* Mark last as EOL */ 1667 sc->ie_bus_write16(sc, IE_RFRAME_LAST(sc->rframes,n), 1668 ((m==0)? (IE_FD_EOL|IE_FD_SUSP) : 0)); 1669 } 1670 1671 /* 1672 * step 3: link the RBDs and set EOL on last one 1673 */ 1674 for (n = 0; n < sc->nrxbuf; n++) { 1675 int m = (n == sc->nrxbuf - 1) ? 0 : n + 1; 1676 1677 /* Clear status */ 1678 sc->ie_bus_write16(sc, IE_RBD_STATUS(sc->rbds,n), 0); 1679 1680 /* Make a circular list */ 1681 sc->ie_bus_write16(sc, IE_RBD_NEXT(sc->rbds,n), 1682 IE_RBD_ADDR(sc->rbds,m)); 1683 1684 /* Link to data buffers */ 1685 sc->ie_bus_write24(sc, IE_RBD_BUFADDR(sc->rbds, n), 1686 IE_RBUF_ADDR(sc, n)); 1687 sc->ie_bus_write16(sc, IE_RBD_BUFLEN(sc->rbds,n), 1688 IE_RBUF_SIZE | ((m==0)?IE_RBD_EOL:0)); 1689 } 1690 1691 /* 1692 * step 4: all xmit no-op commands loopback onto themselves 1693 */ 1694 for (n = 0; n < NTXBUF; n++) { 1695 (sc->ie_bus_write16)(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, n), 0); 1696 1697 (sc->ie_bus_write16)(sc, IE_CMD_NOP_CMD(sc->nop_cmds, n), 1698 IE_CMD_NOP); 1699 1700 (sc->ie_bus_write16)(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n), 1701 IE_CMD_NOP_ADDR(sc->nop_cmds, n)); 1702 } 1703 1704 1705 /* 1706 * step 6: set the head and tail pointers on receive to keep track of 1707 * the order in which RFDs and RBDs are used. 1708 */ 1709 1710 /* Pointers to last packet sent and next available transmit buffer. */ 1711 sc->xchead = sc->xctail = 0; 1712 1713 /* Clear transmit-busy flag and set number of free transmit buffers. */ 1714 sc->xmit_busy = 0; 1715 1716 /* 1717 * Pointers to first and last receive frame. 1718 * The RFD pointed to by rftail is the only one that has EOL set. 1719 */ 1720 sc->rfhead = 0; 1721 sc->rftail = sc->nframes - 1; 1722 1723 /* 1724 * Pointers to first and last receive descriptor buffer. 1725 * The RBD pointed to by rbtail is the only one that has EOL set. 1726 */ 1727 sc->rbhead = 0; 1728 sc->rbtail = sc->nrxbuf - 1; 1729 1730 /* link in recv frames * and buffer into the scb. */ 1731 #ifdef I82586_DEBUG 1732 printf("%s: reserved %d bytes\n", 1733 sc->sc_dev.dv_xname, ptr - sc->buf_area); 1734 #endif 1735 } 1736 1737 static int 1738 ie_cfg_setup(sc, cmd, promiscuous, manchester) 1739 struct ie_softc *sc; 1740 int cmd; 1741 int promiscuous, manchester; 1742 { 1743 int cmdresult, status; 1744 1745 setup_simple_command(sc, IE_CMD_CONFIG, cmd); 1746 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_CNT(cmd), 0x0c); 1747 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_FIFO(cmd), 8); 1748 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SAVEBAD(cmd), 0x40); 1749 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_ADDRLEN(cmd), 0x2e); 1750 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_PRIORITY(cmd), 0); 1751 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_IFS(cmd), 0x60); 1752 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SLOT_LOW(cmd), 0); 1753 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SLOT_HIGH(cmd), 0xf2); 1754 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_PROMISC(cmd), 1755 !!promiscuous | manchester << 2); 1756 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_CRSCDT(cmd), 0); 1757 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_MINLEN(cmd), 64); 1758 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_JUNK(cmd), 0xff); 1759 bus_space_barrier(sc->bt, sc->bh, cmd, IE_CMD_CFG_SZ, 1760 BUS_SPACE_BARRIER_WRITE); 1761 1762 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0); 1763 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)); 1764 if (cmdresult != 0) { 1765 printf("%s: configure command timed out; status %x\n", 1766 sc->sc_dev.dv_xname, status); 1767 return (0); 1768 } 1769 if ((status & IE_STAT_OK) == 0) { 1770 printf("%s: configure command failed; status %x\n", 1771 sc->sc_dev.dv_xname, status); 1772 return (0); 1773 } 1774 1775 /* Squash any pending interrupts */ 1776 ie_ack(sc, IE_ST_WHENCE); 1777 return (1); 1778 } 1779 1780 static int 1781 ie_ia_setup(sc, cmdbuf) 1782 struct ie_softc *sc; 1783 int cmdbuf; 1784 { 1785 int cmdresult, status; 1786 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1787 1788 setup_simple_command(sc, IE_CMD_IASETUP, cmdbuf); 1789 1790 (sc->memcopyout)(sc, LLADDR(ifp->if_sadl), 1791 IE_CMD_IAS_EADDR(cmdbuf), ETHER_ADDR_LEN); 1792 1793 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1794 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1795 if (cmdresult != 0) { 1796 printf("%s: individual address command timed out; status %x\n", 1797 sc->sc_dev.dv_xname, status); 1798 return (0); 1799 } 1800 if ((status & IE_STAT_OK) == 0) { 1801 printf("%s: individual address command failed; status %x\n", 1802 sc->sc_dev.dv_xname, status); 1803 return (0); 1804 } 1805 1806 /* Squash any pending interrupts */ 1807 ie_ack(sc, IE_ST_WHENCE); 1808 return (1); 1809 } 1810 1811 /* 1812 * Run the multicast setup command. 1813 * Called at splnet(). 1814 */ 1815 static int 1816 ie_mc_setup(sc, cmdbuf) 1817 struct ie_softc *sc; 1818 int cmdbuf; 1819 { 1820 int cmdresult, status; 1821 1822 if (sc->mcast_count == 0) 1823 return (1); 1824 1825 setup_simple_command(sc, IE_CMD_MCAST, cmdbuf); 1826 1827 (sc->memcopyout)(sc, (caddr_t)sc->mcast_addrs, 1828 IE_CMD_MCAST_MADDR(cmdbuf), 1829 sc->mcast_count * ETHER_ADDR_LEN); 1830 1831 sc->ie_bus_write16(sc, IE_CMD_MCAST_BYTES(cmdbuf), 1832 sc->mcast_count * ETHER_ADDR_LEN); 1833 1834 /* Start the command */ 1835 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1836 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1837 if (cmdresult != 0) { 1838 printf("%s: multicast setup command timed out; status %x\n", 1839 sc->sc_dev.dv_xname, status); 1840 return (0); 1841 } 1842 if ((status & IE_STAT_OK) == 0) { 1843 printf("%s: multicast setup command failed; status %x\n", 1844 sc->sc_dev.dv_xname, status); 1845 return (0); 1846 } 1847 1848 /* Squash any pending interrupts */ 1849 ie_ack(sc, IE_ST_WHENCE); 1850 return (1); 1851 } 1852 1853 /* 1854 * This routine takes the environment generated by check_ie_present() and adds 1855 * to it all the other structures we need to operate the adapter. This 1856 * includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands, starting 1857 * the receiver unit, and clearing interrupts. 1858 * 1859 * THIS ROUTINE MUST BE CALLED AT splnet() OR HIGHER. 1860 */ 1861 int 1862 i82586_init(sc) 1863 struct ie_softc *sc; 1864 { 1865 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1866 int cmd; 1867 1868 sc->async_cmd_inprogress = 0; 1869 1870 cmd = sc->buf_area; 1871 1872 /* 1873 * Send the configure command first. 1874 */ 1875 if (ie_cfg_setup(sc, cmd, sc->promisc, 0) == 0) 1876 return (0); 1877 1878 /* 1879 * Send the Individual Address Setup command. 1880 */ 1881 if (ie_ia_setup(sc, cmd) == 0) 1882 return (0); 1883 1884 /* 1885 * Run the time-domain reflectometer. 1886 */ 1887 ie_run_tdr(sc, cmd); 1888 1889 /* 1890 * Set the multi-cast filter, if any 1891 */ 1892 if (ie_mc_setup(sc, cmd) == 0) 1893 return (0); 1894 1895 /* 1896 * Acknowledge any interrupts we have generated thus far. 1897 */ 1898 ie_ack(sc, IE_ST_WHENCE); 1899 1900 /* 1901 * Set up the transmit and recv buffers. 1902 */ 1903 i82586_setup_bufs(sc); 1904 1905 if (sc->hwinit) 1906 (sc->hwinit)(sc); 1907 1908 ifp->if_flags |= IFF_RUNNING; 1909 ifp->if_flags &= ~IFF_OACTIVE; 1910 1911 if (NTXBUF < 2) 1912 sc->do_xmitnopchain = 0; 1913 1914 i82586_start_transceiver(sc); 1915 return (1); 1916 } 1917 1918 /* 1919 * Start the RU and possibly the CU unit 1920 */ 1921 static void 1922 i82586_start_transceiver(sc) 1923 struct ie_softc *sc; 1924 { 1925 1926 /* 1927 * Start RU at current position in frame & RBD lists. 1928 */ 1929 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,sc->rfhead), 1930 IE_RBD_ADDR(sc->rbds, sc->rbhead)); 1931 1932 sc->ie_bus_write16(sc, IE_SCB_RCVLST(sc->scb), 1933 IE_RFRAME_ADDR(sc->rframes,sc->rfhead)); 1934 1935 if (sc->do_xmitnopchain) { 1936 /* Stop transmit command chain */ 1937 if (i82586_start_cmd(sc, IE_CUC_SUSPEND|IE_RUC_SUSPEND, 0, 0, 0)) 1938 printf("%s: CU/RU stop command timed out\n", 1939 sc->sc_dev.dv_xname); 1940 1941 /* Start the receiver & transmitter chain */ 1942 /* sc->scb->ie_command_list = 1943 IEADDR(sc->nop_cmds[(sc->xctail+NTXBUF-1) % NTXBUF]);*/ 1944 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), 1945 IE_CMD_NOP_ADDR( 1946 sc->nop_cmds, 1947 (sc->xctail + NTXBUF - 1) % NTXBUF)); 1948 1949 if (i82586_start_cmd(sc, IE_CUC_START|IE_RUC_START, 0, 0, 0)) 1950 printf("%s: CU/RU command timed out\n", 1951 sc->sc_dev.dv_xname); 1952 } else { 1953 if (i82586_start_cmd(sc, IE_RUC_START, 0, 0, 0)) 1954 printf("%s: RU command timed out\n", 1955 sc->sc_dev.dv_xname); 1956 } 1957 } 1958 1959 static void 1960 iestop(sc) 1961 struct ie_softc *sc; 1962 { 1963 1964 if (i82586_start_cmd(sc, IE_RUC_SUSPEND | IE_CUC_SUSPEND, 0, 0, 0)) 1965 printf("%s: iestop: disable commands timed out\n", 1966 sc->sc_dev.dv_xname); 1967 } 1968 1969 int 1970 i82586_ioctl(ifp, cmd, data) 1971 register struct ifnet *ifp; 1972 u_long cmd; 1973 caddr_t data; 1974 { 1975 struct ie_softc *sc = ifp->if_softc; 1976 struct ifaddr *ifa = (struct ifaddr *)data; 1977 struct ifreq *ifr = (struct ifreq *)data; 1978 int s, error = 0; 1979 1980 s = splnet(); 1981 1982 switch(cmd) { 1983 1984 case SIOCSIFADDR: 1985 ifp->if_flags |= IFF_UP; 1986 1987 switch(ifa->ifa_addr->sa_family) { 1988 #ifdef INET 1989 case AF_INET: 1990 i82586_init(sc); 1991 arp_ifinit(ifp, ifa); 1992 break; 1993 #endif 1994 #ifdef NS 1995 /* XXX - This code is probably wrong. */ 1996 case AF_NS: 1997 { 1998 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1999 2000 if (ns_nullhost(*ina)) 2001 ina->x_host = 2002 *(union ns_host *)LLADDR(ifp->if_sadl); 2003 else 2004 bcopy(ina->x_host.c_host, 2005 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 2006 /* Set new address. */ 2007 i82586_init(sc); 2008 break; 2009 } 2010 #endif /* NS */ 2011 default: 2012 i82586_init(sc); 2013 break; 2014 } 2015 break; 2016 2017 case SIOCSIFFLAGS: 2018 sc->promisc = ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI); 2019 if ((ifp->if_flags & IFF_UP) == 0 && 2020 (ifp->if_flags & IFF_RUNNING) != 0) { 2021 /* 2022 * If interface is marked down and it is running, then 2023 * stop it. 2024 */ 2025 iestop(sc); 2026 ifp->if_flags &= ~IFF_RUNNING; 2027 } else if ((ifp->if_flags & IFF_UP) != 0 && 2028 (ifp->if_flags & IFF_RUNNING) == 0) { 2029 /* 2030 * If interface is marked up and it is stopped, then 2031 * start it. 2032 */ 2033 i82586_init(sc); 2034 } else if ((ifp->if_flags & IFF_UP) != 0) { 2035 /* 2036 * Reset the interface to pick up changes in any other 2037 * flags that affect hardware registers. 2038 */ 2039 iestop(sc); 2040 i82586_init(sc); 2041 } 2042 #ifdef I82586_DEBUG 2043 if (ifp->if_flags & IFF_DEBUG) 2044 sc->sc_debug = IED_ALL; 2045 else 2046 sc->sc_debug = 0; 2047 #endif 2048 break; 2049 2050 case SIOCADDMULTI: 2051 case SIOCDELMULTI: 2052 error = (cmd == SIOCADDMULTI) ? 2053 ether_addmulti(ifr, &sc->sc_ethercom): 2054 ether_delmulti(ifr, &sc->sc_ethercom); 2055 2056 if (error == ENETRESET) { 2057 /* 2058 * Multicast list has changed; set the hardware filter 2059 * accordingly. 2060 */ 2061 ie_mc_reset(sc); 2062 error = 0; 2063 } 2064 break; 2065 2066 case SIOCGIFMEDIA: 2067 case SIOCSIFMEDIA: 2068 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 2069 break; 2070 2071 default: 2072 error = EINVAL; 2073 } 2074 splx(s); 2075 return (error); 2076 } 2077 2078 static void 2079 ie_mc_reset(sc) 2080 struct ie_softc *sc; 2081 { 2082 struct ether_multi *enm; 2083 struct ether_multistep step; 2084 int size; 2085 2086 /* 2087 * Step through the list of addresses. 2088 */ 2089 again: 2090 size = 0; 2091 sc->mcast_count = 0; 2092 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 2093 while (enm) { 2094 size += 6; 2095 if (sc->mcast_count >= IE_MAXMCAST || 2096 bcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { 2097 sc->sc_ethercom.ec_if.if_flags |= IFF_ALLMULTI; 2098 i82586_ioctl(&sc->sc_ethercom.ec_if, 2099 SIOCSIFFLAGS, (void *)0); 2100 return; 2101 } 2102 ETHER_NEXT_MULTI(step, enm); 2103 } 2104 2105 if (size > sc->mcast_addrs_size) { 2106 /* Need to allocate more space */ 2107 if (sc->mcast_addrs_size) 2108 free(sc->mcast_addrs, M_IPMADDR); 2109 sc->mcast_addrs = (char *) 2110 malloc(size, M_IPMADDR, M_WAITOK); 2111 sc->mcast_addrs_size = size; 2112 } 2113 2114 /* 2115 * We've got the space; now copy the addresses 2116 */ 2117 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 2118 while (enm) { 2119 if (sc->mcast_count >= IE_MAXMCAST) 2120 goto again; /* Just in case */ 2121 2122 bcopy(enm->enm_addrlo, &sc->mcast_addrs[sc->mcast_count], 6); 2123 sc->mcast_count++; 2124 ETHER_NEXT_MULTI(step, enm); 2125 } 2126 sc->want_mcsetup = 1; 2127 } 2128 2129 /* 2130 * Media change callback. 2131 */ 2132 int 2133 i82586_mediachange(ifp) 2134 struct ifnet *ifp; 2135 { 2136 struct ie_softc *sc = ifp->if_softc; 2137 2138 if (sc->sc_mediachange) 2139 return ((*sc->sc_mediachange)(sc)); 2140 return (EINVAL); 2141 } 2142 2143 /* 2144 * Media status callback. 2145 */ 2146 void 2147 i82586_mediastatus(ifp, ifmr) 2148 struct ifnet *ifp; 2149 struct ifmediareq *ifmr; 2150 { 2151 struct ie_softc *sc = ifp->if_softc; 2152 2153 if (sc->sc_mediastatus) 2154 (*sc->sc_mediastatus)(sc, ifmr); 2155 } 2156 2157 #ifdef I82586_DEBUG 2158 void 2159 print_rbd(sc, n) 2160 struct ie_softc *sc; 2161 int n; 2162 { 2163 2164 printf("RBD at %08x:\n status %04x, next %04x, buffer %lx\n" 2165 "length/EOL %04x\n", IE_RBD_ADDR(sc->rbds,n), 2166 sc->ie_bus_read16(sc, IE_RBD_STATUS(sc->rbds,n)), 2167 sc->ie_bus_read16(sc, IE_RBD_NEXT(sc->rbds,n)), 2168 (u_long)0,/*bus_space_read_4(sc->bt, sc->bh, IE_RBD_BUFADDR(sc->rbds,n)),-* XXX */ 2169 sc->ie_bus_read16(sc, IE_RBD_BUFLEN(sc->rbds,n))); 2170 } 2171 #endif 2172
Indexes created Sun Sep 28 12:09:53 GMT 2025