i82586.c revision 1.13
1 /* $NetBSD: i82586.c,v 1.13 1998/06/04 20:35:44 pk 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. 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) 1993, 1994, 1995 Charles Hannum. 42 * Copyright (c) 1992, 1993, University of Vermont and State 43 * Agricultural College. 44 * Copyright (c) 1992, 1993, Garrett A. Wollman. 45 * 46 * Portions: 47 * Copyright (c) 1994, 1995, Rafal K. Boni 48 * Copyright (c) 1990, 1991, William F. Jolitz 49 * Copyright (c) 1990, The Regents of the University of California 50 * 51 * All rights reserved. 52 * 53 * Redistribution and use in source and binary forms, with or without 54 * modification, are permitted provided that the following conditions 55 * are met: 56 * 1. Redistributions of source code must retain the above copyright 57 * notice, this list of conditions and the following disclaimer. 58 * 2. Redistributions in binary form must reproduce the above copyright 59 * notice, this list of conditions and the following disclaimer in the 60 * documentation and/or other materials provided with the distribution. 61 * 3. All advertising materials mentioning features or use of this software 62 * must display the following acknowledgement: 63 * This product includes software developed by Charles Hannum, by the 64 * University of Vermont and State Agricultural College and Garrett A. 65 * Wollman, by William F. Jolitz, and by the University of California, 66 * Berkeley, Lawrence Berkeley Laboratory, and its contributors. 67 * 4. Neither the names of the Universities nor the names of the authors 68 * may be used to endorse or promote products derived from this software 69 * without specific prior written permission. 70 * 71 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 72 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 73 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 74 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR AUTHORS BE LIABLE 75 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 76 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 77 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 78 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 79 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 80 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 81 * SUCH DAMAGE. 82 */ 83 84 /* 85 * Intel 82586 Ethernet chip 86 * Register, bit, and structure definitions. 87 * 88 * Original StarLAN driver written by Garrett Wollman with reference to the 89 * Clarkson Packet Driver code for this chip written by Russ Nelson and others. 90 * 91 * BPF support code taken from hpdev/if_le.c, supplied with tcpdump. 92 * 93 * 3C507 support is loosely based on code donated to NetBSD by Rafal Boni. 94 * 95 * Majorly cleaned up and 3C507 code merged by Charles Hannum. 96 * 97 * Converted to SUN ie driver by Charles D. Cranor, 98 * October 1994, January 1995. 99 * This sun version based on i386 version 1.30. 100 */ 101 102 /* 103 * The i82586 is a very painful chip, found in sun3's, sun-4/100's 104 * sun-4/200's, and VME based suns. The byte order is all wrong for a 105 * SUN, making life difficult. Programming this chip is mostly the same, 106 * but certain details differ from system to system. This driver is 107 * written so that different "ie" interfaces can be controled by the same 108 * driver. 109 */ 110 111 /* 112 Mode of operation: 113 114 We run the 82586 in a standard Ethernet mode. We keep NFRAMES 115 received frame descriptors around for the receiver to use, and 116 NRXBUF associated receive buffer descriptors, both in a circular 117 list. Whenever a frame is received, we rotate both lists as 118 necessary. (The 586 treats both lists as a simple queue.) We also 119 keep a transmit command around so that packets can be sent off 120 quickly. 121 122 We configure the adapter in AL-LOC = 1 mode, which means that the 123 Ethernet/802.3 MAC header is placed at the beginning of the receive 124 buffer rather than being split off into various fields in the RFD. 125 This also means that we must include this header in the transmit 126 buffer as well. 127 128 By convention, all transmit commands, and only transmit commands, 129 shall have the I (IE_CMD_INTR) bit set in the command. This way, 130 when an interrupt arrives at i82586_intr(), it is immediately possible 131 to tell what precisely caused it. ANY OTHER command-sending 132 routines should run at splnet(), and should post an acknowledgement 133 to every interrupt they generate. 134 135 To save the expense of shipping a command to 82586 every time we 136 want to send a frame, we use a linked list of commands consisting 137 of alternate XMIT and NOP commands. The links of these elements 138 are manipulated (in iexmit()) such that the NOP command loops back 139 to itself whenever the following XMIT command is not yet ready to 140 go. Whenever an XMIT is ready, the preceding NOP link is pointed 141 at it, while its own link field points to the following NOP command. 142 Thus, a single transmit command sets off an interlocked traversal 143 of the xmit command chain, with the host processor in control of 144 the synchronization. 145 */ 146 147 #include "bpfilter.h" 148 149 #include <sys/param.h> 150 #include <sys/systm.h> 151 #include <sys/mbuf.h> 152 #include <sys/buf.h> 153 #include <sys/protosw.h> 154 #include <sys/socket.h> 155 #include <sys/ioctl.h> 156 #include <sys/errno.h> 157 #include <sys/syslog.h> 158 #include <sys/device.h> 159 160 #include <net/if.h> 161 #include <net/if_dl.h> 162 #include <net/if_types.h> 163 #include <net/if_media.h> 164 #include <net/if_ether.h> 165 166 #if NBPFILTER > 0 167 #include <net/bpf.h> 168 #include <net/bpfdesc.h> 169 #endif 170 171 #ifdef INET 172 #include <netinet/in.h> 173 #include <netinet/in_systm.h> 174 #include <netinet/in_var.h> 175 #include <netinet/ip.h> 176 #include <netinet/if_inarp.h> 177 #endif 178 179 #ifdef NS 180 #include <netns/ns.h> 181 #include <netns/ns_if.h> 182 #endif 183 184 #include <machine/bus.h> 185 186 #include <dev/ic/i82586reg.h> 187 #include <dev/ic/i82586var.h> 188 189 void i82586_reset __P((struct ie_softc *, int)); 190 void i82586_watchdog __P((struct ifnet *)); 191 int i82586_init __P((struct ie_softc *)); 192 int i82586_ioctl __P((struct ifnet *, u_long, caddr_t)); 193 void i82586_start __P((struct ifnet *)); 194 195 int i82586_rint __P((struct ie_softc *, int)); 196 int i82586_tint __P((struct ie_softc *, int)); 197 198 int i82586_mediachange __P((struct ifnet *)); 199 void i82586_mediastatus __P((struct ifnet *, 200 struct ifmediareq *)); 201 202 static int ie_readframe __P((struct ie_softc *, int)); 203 static struct mbuf *ieget __P((struct ie_softc *, 204 struct ether_header *, 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, ehp, to_bpf, head, totlen) 1077 struct ie_softc *sc; 1078 struct ether_header *ehp; 1079 int *to_bpf; 1080 int head; 1081 int totlen; 1082 { 1083 struct mbuf *top, **mp, *m; 1084 int len, resid; 1085 int thisrboff, thismboff; 1086 1087 /* 1088 * Snarf the Ethernet header. 1089 */ 1090 (sc->memcopyin)(sc, ehp, IE_RBUF_ADDR(sc,head), sizeof *ehp); 1091 1092 /* 1093 * As quickly as possible, check if this packet is for us. 1094 * If not, don't waste a single cycle copying the rest of the 1095 * packet in. 1096 * This is only a consideration when FILTER is defined; i.e., when 1097 * we are either running BPF or doing multicasting. 1098 */ 1099 if (!check_eh(sc, ehp, to_bpf)) { 1100 /* just this case, it's not an error */ 1101 sc->sc_ethercom.ec_if.if_ierrors--; 1102 return (0); 1103 } 1104 1105 resid = totlen -= (thisrboff = sizeof *ehp); 1106 1107 MGETHDR(m, M_DONTWAIT, MT_DATA); 1108 if (m == 0) 1109 return (0); 1110 m->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 1111 m->m_pkthdr.len = totlen; 1112 len = MHLEN; 1113 top = 0; 1114 mp = ⊤ 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 (top) { 1122 MGET(m, M_DONTWAIT, MT_DATA); 1123 if (m == 0) { 1124 m_freem(top); 1125 return (0); 1126 } 1127 len = MLEN; 1128 } 1129 if (totlen >= MINCLSIZE) { 1130 MCLGET(m, M_DONTWAIT); 1131 if ((m->m_flags & M_EXT) == 0) { 1132 m_freem(top); 1133 return (0); 1134 } 1135 len = MCLBYTES; 1136 } 1137 m->m_len = len = min(totlen, len); 1138 totlen -= len; 1139 *mp = m; 1140 mp = &m->m_next; 1141 } 1142 1143 m = top; 1144 thismboff = 0; 1145 1146 /* 1147 * Now we take the mbuf chain (hopefully only one mbuf most of the 1148 * time) and stuff the data into it. There are no possible failures 1149 * at or after this point. 1150 */ 1151 while (resid > 0) { 1152 int thisrblen = IE_RBUF_SIZE - thisrboff, 1153 thismblen = m->m_len - thismboff; 1154 len = min(thisrblen, thismblen); 1155 1156 (sc->memcopyin)(sc, mtod(m, caddr_t) + thismboff, 1157 IE_RBUF_ADDR(sc,head) + thisrboff, 1158 (u_int)len); 1159 resid -= len; 1160 1161 if (len == thismblen) { 1162 m = m->m_next; 1163 thismboff = 0; 1164 } else 1165 thismboff += len; 1166 1167 if (len == thisrblen) { 1168 if (++head == sc->nrxbuf) 1169 head = 0; 1170 thisrboff = 0; 1171 } else 1172 thisrboff += len; 1173 } 1174 1175 /* 1176 * Unless something changed strangely while we were doing the copy, 1177 * we have now copied everything in from the shared memory. 1178 * This means that we are done. 1179 */ 1180 return (top); 1181 } 1182 1183 /* 1184 * Read frame NUM from unit UNIT (pre-cached as IE). 1185 * 1186 * This routine reads the RFD at NUM, and copies in the buffers from the list 1187 * of RBD, then rotates the RBD list so that the receiver doesn't start 1188 * complaining. Trailers are DROPPED---there's no point in wasting time 1189 * on confusing code to deal with them. Hopefully, this machine will 1190 * never ARP for trailers anyway. 1191 */ 1192 static int 1193 ie_readframe(sc, num) 1194 struct ie_softc *sc; 1195 int num; /* frame number to read */ 1196 { 1197 struct mbuf *m; 1198 struct ether_header eh; 1199 u_int16_t bstart, bend; 1200 int pktlen; 1201 #if NBPFILTER > 0 1202 int bpf_gets_it = 0; 1203 #endif 1204 1205 if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) { 1206 sc->sc_ethercom.ec_if.if_ierrors++; 1207 return (1); 1208 } 1209 1210 #if NBPFILTER > 0 1211 m = ieget(sc, &eh, &bpf_gets_it, bstart, pktlen); 1212 #else 1213 m = ieget(sc, &eh, 0, bstart, pktlen); 1214 #endif 1215 i82586_release_rbd_list(sc, bstart, bend); 1216 1217 if (m == 0) { 1218 sc->sc_ethercom.ec_if.if_ierrors++; 1219 return (0); 1220 } 1221 1222 #ifdef I82586_DEBUG 1223 if (sc->sc_debug & IED_READFRAME) 1224 printf("%s: frame from ether %s type 0x%x len %d\n", 1225 sc->sc_dev.dv_xname, 1226 ether_sprintf(eh.ether_shost), 1227 (u_int)eh.ether_type, 1228 pktlen); 1229 #endif 1230 1231 #if NBPFILTER > 0 1232 /* 1233 * Check for a BPF filter; if so, hand it up. 1234 * Note that we have to stick an extra mbuf up front, because bpf_mtap 1235 * expects to have the ether header at the front. 1236 * It doesn't matter that this results in an ill-formatted mbuf chain, 1237 * since BPF just looks at the data. (It doesn't try to free the mbuf, 1238 * tho' it will make a copy for tcpdump.) 1239 */ 1240 if (bpf_gets_it) { 1241 struct mbuf m0; 1242 m0.m_len = sizeof eh; 1243 m0.m_data = (caddr_t)&eh; 1244 m0.m_next = m; 1245 1246 /* Pass it up. */ 1247 bpf_mtap(sc->sc_ethercom.ec_if.if_bpf, &m0); 1248 1249 /* 1250 * A signal passed up from the filtering code indicating that 1251 * the packet is intended for BPF but not for the protocol 1252 * machinery. We can save a few cycles by not handing it 1253 * off to them. 1254 */ 1255 if (bpf_gets_it == 2) { 1256 m_freem(m); 1257 return (0); 1258 } 1259 } 1260 #endif /* NBPFILTER > 0 */ 1261 1262 /* 1263 * Finally pass this packet up to higher layers. 1264 */ 1265 ether_input(&sc->sc_ethercom.ec_if, &eh, m); 1266 sc->sc_ethercom.ec_if.if_ipackets++; 1267 return (0); 1268 } 1269 1270 1271 /* 1272 * Setup all necessary artifacts for an XMIT command, and then pass the XMIT 1273 * command to the chip to be executed. 1274 */ 1275 static __inline__ void 1276 iexmit(sc) 1277 struct ie_softc *sc; 1278 { 1279 int off; 1280 int cur, prev; 1281 1282 cur = sc->xctail; 1283 1284 #ifdef I82586_DEBUG 1285 if (sc->sc_debug & IED_XMIT) 1286 printf("%s: xmit buffer %d\n", sc->sc_dev.dv_xname, cur); 1287 #endif 1288 1289 /* 1290 * Setup the transmit command. 1291 */ 1292 sc->ie_bus_write16(sc, IE_CMD_XMIT_DESC(sc->xmit_cmds, cur), 1293 IE_XBD_ADDR(sc->xbds, cur)); 1294 1295 sc->ie_bus_write16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, cur), 0); 1296 1297 if (sc->do_xmitnopchain) { 1298 /* 1299 * Gate this XMIT command to the following NOP 1300 */ 1301 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds, cur), 1302 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1303 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1304 IE_CMD_XMIT | IE_CMD_INTR); 1305 1306 /* 1307 * Loopback at following NOP 1308 */ 1309 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, cur), 0); 1310 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur), 1311 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1312 1313 /* 1314 * Gate preceding NOP to this XMIT command 1315 */ 1316 prev = (cur + NTXBUF - 1) % NTXBUF; 1317 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, prev), 0); 1318 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev), 1319 IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1320 1321 off = IE_SCB_STATUS(sc->scb); 1322 bus_space_barrier(sc->bt, sc->bh, off, 2, 1323 BUS_SPACE_BARRIER_READ); 1324 if ((sc->ie_bus_read16(sc, off) & IE_CUS_ACTIVE) == 0) { 1325 printf("iexmit: CU not active\n"); 1326 i82586_start_transceiver(sc); 1327 } 1328 } else { 1329 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds,cur), 1330 0xffff); 1331 1332 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1333 IE_CMD_XMIT | IE_CMD_INTR | IE_CMD_LAST); 1334 1335 off = IE_SCB_CMDLST(sc->scb); 1336 sc->ie_bus_write16(sc, off, IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1337 bus_space_barrier(sc->bt, sc->bh, off, 2, 1338 BUS_SPACE_BARRIER_WRITE); 1339 1340 if (i82586_start_cmd(sc, IE_CUC_START, 0, 0, 1)) 1341 printf("%s: iexmit: start xmit command timed out\n", 1342 sc->sc_dev.dv_xname); 1343 } 1344 1345 sc->sc_ethercom.ec_if.if_timer = 5; 1346 } 1347 1348 1349 /* 1350 * Start transmission on an interface. 1351 */ 1352 void 1353 i82586_start(ifp) 1354 struct ifnet *ifp; 1355 { 1356 struct ie_softc *sc = ifp->if_softc; 1357 struct mbuf *m0, *m; 1358 int buffer, head, xbase; 1359 u_short len; 1360 int s; 1361 1362 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 1363 return; 1364 1365 for (;;) { 1366 if (sc->xmit_busy == NTXBUF) { 1367 ifp->if_flags |= IFF_OACTIVE; 1368 break; 1369 } 1370 1371 head = sc->xchead; 1372 xbase = sc->xbds; 1373 1374 IF_DEQUEUE(&ifp->if_snd, m0); 1375 if (m0 == 0) 1376 break; 1377 1378 /* We need to use m->m_pkthdr.len, so require the header */ 1379 if ((m0->m_flags & M_PKTHDR) == 0) 1380 panic("i82586_start: no header mbuf"); 1381 1382 #if NBPFILTER > 0 1383 /* Tap off here if there is a BPF listener. */ 1384 if (ifp->if_bpf) 1385 bpf_mtap(ifp->if_bpf, m0); 1386 #endif 1387 1388 #ifdef I82586_DEBUG 1389 if (sc->sc_debug & IED_ENQ) 1390 printf("%s: fill buffer %d\n", sc->sc_dev.dv_xname, 1391 sc->xchead); 1392 #endif 1393 1394 if (m0->m_pkthdr.len > IE_TBUF_SIZE) 1395 printf("%s: tbuf overflow\n", sc->sc_dev.dv_xname); 1396 1397 buffer = IE_XBUF_ADDR(sc, head); 1398 for (m = m0; m != 0; m = m->m_next) { 1399 (sc->memcopyout)(sc, mtod(m,caddr_t), buffer, m->m_len); 1400 buffer += m->m_len; 1401 } 1402 1403 len = max(m0->m_pkthdr.len, ETHER_MIN_LEN); 1404 m_freem(m0); 1405 1406 /* 1407 * Setup the transmit buffer descriptor here, while we 1408 * know the packet's length. 1409 */ 1410 sc->ie_bus_write16(sc, IE_XBD_FLAGS(xbase, head), 1411 len | IE_TBD_EOL); 1412 sc->ie_bus_write16(sc, IE_XBD_NEXT(xbase, head), 0xffff); 1413 sc->ie_bus_write24(sc, IE_XBD_BUF(xbase, head), 1414 IE_XBUF_ADDR(sc, head)); 1415 1416 if (++head == NTXBUF) 1417 head = 0; 1418 sc->xchead = head; 1419 1420 s = splnet(); 1421 /* Start the first packet transmitting. */ 1422 if (sc->xmit_busy == 0) 1423 iexmit(sc); 1424 1425 sc->xmit_busy++; 1426 splx(s); 1427 } 1428 } 1429 1430 /* 1431 * Probe IE's ram setup [ Move all this into MD front-end!? ] 1432 * Use only if SCP and ISCP represent offsets into shared ram space. 1433 */ 1434 int 1435 i82586_proberam(sc) 1436 struct ie_softc *sc; 1437 { 1438 int result, off; 1439 1440 /* Put in 16-bit mode */ 1441 off = IE_SCP_BUS_USE(sc->scp); 1442 bus_space_write_1(sc->bt, sc->bh, off, 0); 1443 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_WRITE); 1444 1445 /* Set the ISCP `busy' bit */ 1446 off = IE_ISCP_BUSY(sc->iscp); 1447 bus_space_write_1(sc->bt, sc->bh, off, 1); 1448 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_WRITE); 1449 1450 if (sc->hwreset) 1451 (sc->hwreset)(sc, CHIP_PROBE); 1452 1453 (sc->chan_attn) (sc); 1454 1455 delay(100); /* wait a while... */ 1456 1457 /* Read back the ISCP `busy' bit; it should be clear by now */ 1458 off = IE_ISCP_BUSY(sc->iscp); 1459 bus_space_barrier(sc->bt, sc->bh, off, 1, BUS_SPACE_BARRIER_READ); 1460 result = bus_space_read_1(sc->bt, sc->bh, off) == 0; 1461 1462 /* Acknowledge any interrupts we may have caused. */ 1463 ie_ack(sc, IE_ST_WHENCE); 1464 1465 return (result); 1466 } 1467 1468 void 1469 i82586_reset(sc, hard) 1470 struct ie_softc *sc; 1471 int hard; 1472 { 1473 int s = splnet(); 1474 1475 if (hard) 1476 printf("%s: reset\n", sc->sc_dev.dv_xname); 1477 1478 /* Clear OACTIVE in case we're called from watchdog (frozen xmit). */ 1479 sc->sc_ethercom.ec_if.if_timer = 0; 1480 sc->sc_ethercom.ec_if.if_flags &= ~IFF_OACTIVE; 1481 1482 /* 1483 * Stop i82586 dead in its tracks. 1484 */ 1485 if (i82586_start_cmd(sc, IE_RUC_ABORT | IE_CUC_ABORT, 0, 0, 0)) 1486 printf("%s: abort commands timed out\n", sc->sc_dev.dv_xname); 1487 1488 /* 1489 * This can really slow down the i82586_reset() on some cards, but it's 1490 * necessary to unwedge other ones (eg, the Sun VME ones) from certain 1491 * lockups. 1492 */ 1493 if (hard && sc->hwreset) 1494 (sc->hwreset)(sc, CARD_RESET); 1495 1496 delay(100); 1497 ie_ack(sc, IE_ST_WHENCE); 1498 1499 if ((sc->sc_ethercom.ec_if.if_flags & IFF_UP) != 0) { 1500 int retries=0; /* XXX - find out why init sometimes fails */ 1501 while (retries++ < 2) 1502 if (i82586_init(sc) == 1) 1503 break; 1504 } 1505 1506 splx(s); 1507 } 1508 1509 1510 static void 1511 setup_simple_command(sc, cmd, cmdbuf) 1512 struct ie_softc *sc; 1513 int cmd; 1514 int cmdbuf; 1515 { 1516 /* Setup a simple command */ 1517 sc->ie_bus_write16(sc, IE_CMD_COMMON_STATUS(cmdbuf), 0); 1518 sc->ie_bus_write16(sc, IE_CMD_COMMON_CMD(cmdbuf), cmd | IE_CMD_LAST); 1519 sc->ie_bus_write16(sc, IE_CMD_COMMON_LINK(cmdbuf), 0xffff); 1520 1521 /* Assign the command buffer to the SCB command list */ 1522 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), cmdbuf); 1523 } 1524 1525 /* 1526 * Run the time-domain reflectometer. 1527 */ 1528 static void 1529 ie_run_tdr(sc, cmd) 1530 struct ie_softc *sc; 1531 int cmd; 1532 { 1533 int result; 1534 1535 setup_simple_command(sc, IE_CMD_TDR, cmd); 1536 (sc->ie_bus_write16)(sc, IE_CMD_TDR_TIME(cmd), 0); 1537 1538 if (i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0) || 1539 (sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)) & IE_STAT_OK) == 0) 1540 result = 0x10000; /* XXX */ 1541 else 1542 result = sc->ie_bus_read16(sc, IE_CMD_TDR_TIME(cmd)); 1543 1544 /* Squash any pending interrupts */ 1545 ie_ack(sc, IE_ST_WHENCE); 1546 1547 if (result & IE_TDR_SUCCESS) 1548 return; 1549 1550 if (result & 0x10000) 1551 printf("%s: TDR command failed\n", sc->sc_dev.dv_xname); 1552 else if (result & IE_TDR_XCVR) 1553 printf("%s: transceiver problem\n", sc->sc_dev.dv_xname); 1554 else if (result & IE_TDR_OPEN) 1555 printf("%s: TDR detected an open %d clocks away\n", 1556 sc->sc_dev.dv_xname, result & IE_TDR_TIME); 1557 else if (result & IE_TDR_SHORT) 1558 printf("%s: TDR detected a short %d clocks away\n", 1559 sc->sc_dev.dv_xname, result & IE_TDR_TIME); 1560 else 1561 printf("%s: TDR returned unknown status 0x%x\n", 1562 sc->sc_dev.dv_xname, result); 1563 } 1564 1565 1566 /* 1567 * i82586_setup_bufs: set up the buffers 1568 * 1569 * We have a block of KVA at sc->buf_area which is of size sc->buf_area_sz. 1570 * this is to be used for the buffers. The chip indexs its control data 1571 * structures with 16 bit offsets, and it indexes actual buffers with 1572 * 24 bit addresses. So we should allocate control buffers first so that 1573 * we don't overflow the 16 bit offset field. The number of transmit 1574 * buffers is fixed at compile time. 1575 * 1576 */ 1577 static void 1578 i82586_setup_bufs(sc) 1579 struct ie_softc *sc; 1580 { 1581 int ptr = sc->buf_area; /* memory pool */ 1582 int n, r; 1583 1584 /* 1585 * step 0: zero memory and figure out how many recv buffers and 1586 * frames we can have. 1587 */ 1588 ptr = (ptr + 3) & ~3; /* set alignment and stick with it */ 1589 1590 1591 /* 1592 * step 1: lay out data structures in the shared-memory area 1593 */ 1594 1595 /* The no-op commands; used if "nop-chaining" is in effect */ 1596 sc->nop_cmds = ptr; 1597 ptr += NTXBUF * IE_CMD_NOP_SZ; 1598 1599 /* The transmit commands */ 1600 sc->xmit_cmds = ptr; 1601 ptr += NTXBUF * IE_CMD_XMIT_SZ; 1602 1603 /* The transmit buffers descriptors */ 1604 sc->xbds = ptr; 1605 ptr += NTXBUF * IE_XBD_SZ; 1606 1607 /* The transmit buffers */ 1608 sc->xbufs = ptr; 1609 ptr += NTXBUF * IE_TBUF_SIZE; 1610 1611 ptr = (ptr + 3) & ~3; /* re-align.. just in case */ 1612 1613 /* Compute free space for RECV stuff */ 1614 n = sc->buf_area_sz - (ptr - sc->buf_area); 1615 1616 /* Compute size of one RECV frame */ 1617 r = IE_RFRAME_SZ + ((IE_RBD_SZ + IE_RBUF_SIZE) * B_PER_F); 1618 1619 sc->nframes = n / r; 1620 1621 if (sc->nframes <= 0) 1622 panic("ie: bogus buffer calc\n"); 1623 1624 sc->nrxbuf = sc->nframes * B_PER_F; 1625 1626 /* The receice frame descriptors */ 1627 sc->rframes = ptr; 1628 ptr += sc->nframes * IE_RFRAME_SZ; 1629 1630 /* The receive buffer descriptors */ 1631 sc->rbds = ptr; 1632 ptr += sc->nrxbuf * IE_RBD_SZ; 1633 1634 /* The receive buffers */ 1635 sc->rbufs = ptr; 1636 ptr += sc->nrxbuf * IE_RBUF_SIZE; 1637 1638 #ifdef I82586_DEBUG 1639 printf("%s: %d frames %d bufs\n", sc->sc_dev.dv_xname, sc->nframes, 1640 sc->nrxbuf); 1641 #endif 1642 1643 /* 1644 * step 2: link together the recv frames and set EOL on last one 1645 */ 1646 for (n = 0; n < sc->nframes; n++) { 1647 int m = (n == sc->nframes - 1) ? 0 : n + 1; 1648 1649 /* Clear status */ 1650 sc->ie_bus_write16(sc, IE_RFRAME_STATUS(sc->rframes,n), 0); 1651 1652 /* RBD link = NULL */ 1653 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,n), 1654 0xffff); 1655 1656 /* Make a circular list */ 1657 sc->ie_bus_write16(sc, IE_RFRAME_NEXT(sc->rframes,n), 1658 IE_RFRAME_ADDR(sc->rframes,m)); 1659 1660 /* Mark last as EOL */ 1661 sc->ie_bus_write16(sc, IE_RFRAME_LAST(sc->rframes,n), 1662 ((m==0)? (IE_FD_EOL|IE_FD_SUSP) : 0)); 1663 } 1664 1665 /* 1666 * step 3: link the RBDs and set EOL on last one 1667 */ 1668 for (n = 0; n < sc->nrxbuf; n++) { 1669 int m = (n == sc->nrxbuf - 1) ? 0 : n + 1; 1670 1671 /* Clear status */ 1672 sc->ie_bus_write16(sc, IE_RBD_STATUS(sc->rbds,n), 0); 1673 1674 /* Make a circular list */ 1675 sc->ie_bus_write16(sc, IE_RBD_NEXT(sc->rbds,n), 1676 IE_RBD_ADDR(sc->rbds,m)); 1677 1678 /* Link to data buffers */ 1679 sc->ie_bus_write24(sc, IE_RBD_BUFADDR(sc->rbds, n), 1680 IE_RBUF_ADDR(sc, n)); 1681 sc->ie_bus_write16(sc, IE_RBD_BUFLEN(sc->rbds,n), 1682 IE_RBUF_SIZE | ((m==0)?IE_RBD_EOL:0)); 1683 } 1684 1685 /* 1686 * step 4: all xmit no-op commands loopback onto themselves 1687 */ 1688 for (n = 0; n < NTXBUF; n++) { 1689 (sc->ie_bus_write16)(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, n), 0); 1690 1691 (sc->ie_bus_write16)(sc, IE_CMD_NOP_CMD(sc->nop_cmds, n), 1692 IE_CMD_NOP); 1693 1694 (sc->ie_bus_write16)(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n), 1695 IE_CMD_NOP_ADDR(sc->nop_cmds, n)); 1696 } 1697 1698 1699 /* 1700 * step 6: set the head and tail pointers on receive to keep track of 1701 * the order in which RFDs and RBDs are used. 1702 */ 1703 1704 /* Pointers to last packet sent and next available transmit buffer. */ 1705 sc->xchead = sc->xctail = 0; 1706 1707 /* Clear transmit-busy flag and set number of free transmit buffers. */ 1708 sc->xmit_busy = 0; 1709 1710 /* 1711 * Pointers to first and last receive frame. 1712 * The RFD pointed to by rftail is the only one that has EOL set. 1713 */ 1714 sc->rfhead = 0; 1715 sc->rftail = sc->nframes - 1; 1716 1717 /* 1718 * Pointers to first and last receive descriptor buffer. 1719 * The RBD pointed to by rbtail is the only one that has EOL set. 1720 */ 1721 sc->rbhead = 0; 1722 sc->rbtail = sc->nrxbuf - 1; 1723 1724 /* link in recv frames * and buffer into the scb. */ 1725 #ifdef I82586_DEBUG 1726 printf("%s: reserved %d bytes\n", 1727 sc->sc_dev.dv_xname, ptr - sc->buf_area); 1728 #endif 1729 } 1730 1731 static int 1732 ie_cfg_setup(sc, cmd, promiscuous, manchester) 1733 struct ie_softc *sc; 1734 int cmd; 1735 int promiscuous, manchester; 1736 { 1737 int cmdresult, status; 1738 1739 setup_simple_command(sc, IE_CMD_CONFIG, cmd); 1740 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_CNT(cmd), 0x0c); 1741 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_FIFO(cmd), 8); 1742 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SAVEBAD(cmd), 0x40); 1743 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_ADDRLEN(cmd), 0x2e); 1744 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_PRIORITY(cmd), 0); 1745 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_IFS(cmd), 0x60); 1746 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SLOT_LOW(cmd), 0); 1747 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_SLOT_HIGH(cmd), 0xf2); 1748 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_PROMISC(cmd), 1749 !!promiscuous | manchester << 2); 1750 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_CRSCDT(cmd), 0); 1751 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_MINLEN(cmd), 64); 1752 bus_space_write_1(sc->bt, sc->bh, IE_CMD_CFG_JUNK(cmd), 0xff); 1753 bus_space_barrier(sc->bt, sc->bh, cmd, IE_CMD_CFG_SZ, 1754 BUS_SPACE_BARRIER_WRITE); 1755 1756 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0); 1757 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)); 1758 if (cmdresult != 0) { 1759 printf("%s: configure command timed out; status %x\n", 1760 sc->sc_dev.dv_xname, status); 1761 return (0); 1762 } 1763 if ((status & IE_STAT_OK) == 0) { 1764 printf("%s: configure command failed; status %x\n", 1765 sc->sc_dev.dv_xname, status); 1766 return (0); 1767 } 1768 1769 /* Squash any pending interrupts */ 1770 ie_ack(sc, IE_ST_WHENCE); 1771 return (1); 1772 } 1773 1774 static int 1775 ie_ia_setup(sc, cmdbuf) 1776 struct ie_softc *sc; 1777 int cmdbuf; 1778 { 1779 int cmdresult, status; 1780 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1781 1782 setup_simple_command(sc, IE_CMD_IASETUP, cmdbuf); 1783 1784 (sc->memcopyout)(sc, LLADDR(ifp->if_sadl), 1785 IE_CMD_IAS_EADDR(cmdbuf), ETHER_ADDR_LEN); 1786 1787 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1788 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1789 if (cmdresult != 0) { 1790 printf("%s: individual address command timed out; status %x\n", 1791 sc->sc_dev.dv_xname, status); 1792 return (0); 1793 } 1794 if ((status & IE_STAT_OK) == 0) { 1795 printf("%s: individual address command failed; status %x\n", 1796 sc->sc_dev.dv_xname, status); 1797 return (0); 1798 } 1799 1800 /* Squash any pending interrupts */ 1801 ie_ack(sc, IE_ST_WHENCE); 1802 return (1); 1803 } 1804 1805 /* 1806 * Run the multicast setup command. 1807 * Called at splnet(). 1808 */ 1809 static int 1810 ie_mc_setup(sc, cmdbuf) 1811 struct ie_softc *sc; 1812 int cmdbuf; 1813 { 1814 int cmdresult, status; 1815 1816 if (sc->mcast_count == 0) 1817 return (1); 1818 1819 setup_simple_command(sc, IE_CMD_MCAST, cmdbuf); 1820 1821 (sc->memcopyout)(sc, (caddr_t)sc->mcast_addrs, 1822 IE_CMD_MCAST_MADDR(cmdbuf), 1823 sc->mcast_count * ETHER_ADDR_LEN); 1824 1825 sc->ie_bus_write16(sc, IE_CMD_MCAST_BYTES(cmdbuf), 1826 sc->mcast_count * ETHER_ADDR_LEN); 1827 1828 /* Start the command */ 1829 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1830 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1831 if (cmdresult != 0) { 1832 printf("%s: multicast setup command timed out; status %x\n", 1833 sc->sc_dev.dv_xname, status); 1834 return (0); 1835 } 1836 if ((status & IE_STAT_OK) == 0) { 1837 printf("%s: multicast setup command failed; status %x\n", 1838 sc->sc_dev.dv_xname, status); 1839 return (0); 1840 } 1841 1842 /* Squash any pending interrupts */ 1843 ie_ack(sc, IE_ST_WHENCE); 1844 return (1); 1845 } 1846 1847 /* 1848 * This routine takes the environment generated by check_ie_present() and adds 1849 * to it all the other structures we need to operate the adapter. This 1850 * includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands, starting 1851 * the receiver unit, and clearing interrupts. 1852 * 1853 * THIS ROUTINE MUST BE CALLED AT splnet() OR HIGHER. 1854 */ 1855 int 1856 i82586_init(sc) 1857 struct ie_softc *sc; 1858 { 1859 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1860 int cmd; 1861 1862 sc->async_cmd_inprogress = 0; 1863 1864 cmd = sc->buf_area; 1865 1866 /* 1867 * Send the configure command first. 1868 */ 1869 if (ie_cfg_setup(sc, cmd, sc->promisc, 0) == 0) 1870 return (0); 1871 1872 /* 1873 * Send the Individual Address Setup command. 1874 */ 1875 if (ie_ia_setup(sc, cmd) == 0) 1876 return (0); 1877 1878 /* 1879 * Run the time-domain reflectometer. 1880 */ 1881 ie_run_tdr(sc, cmd); 1882 1883 /* 1884 * Set the multi-cast filter, if any 1885 */ 1886 if (ie_mc_setup(sc, cmd) == 0) 1887 return (0); 1888 1889 /* 1890 * Acknowledge any interrupts we have generated thus far. 1891 */ 1892 ie_ack(sc, IE_ST_WHENCE); 1893 1894 /* 1895 * Set up the transmit and recv buffers. 1896 */ 1897 i82586_setup_bufs(sc); 1898 1899 if (sc->hwinit) 1900 (sc->hwinit)(sc); 1901 1902 ifp->if_flags |= IFF_RUNNING; 1903 ifp->if_flags &= ~IFF_OACTIVE; 1904 1905 if (NTXBUF < 2) 1906 sc->do_xmitnopchain = 0; 1907 1908 i82586_start_transceiver(sc); 1909 return (1); 1910 } 1911 1912 /* 1913 * Start the RU and possibly the CU unit 1914 */ 1915 static void 1916 i82586_start_transceiver(sc) 1917 struct ie_softc *sc; 1918 { 1919 1920 /* 1921 * Start RU at current position in frame & RBD lists. 1922 */ 1923 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,sc->rfhead), 1924 IE_RBD_ADDR(sc->rbds, sc->rbhead)); 1925 1926 sc->ie_bus_write16(sc, IE_SCB_RCVLST(sc->scb), 1927 IE_RFRAME_ADDR(sc->rframes,sc->rfhead)); 1928 1929 if (sc->do_xmitnopchain) { 1930 /* Stop transmit command chain */ 1931 if (i82586_start_cmd(sc, IE_CUC_SUSPEND|IE_RUC_SUSPEND, 0, 0, 0)) 1932 printf("%s: CU/RU stop command timed out\n", 1933 sc->sc_dev.dv_xname); 1934 1935 /* Start the receiver & transmitter chain */ 1936 /* sc->scb->ie_command_list = 1937 IEADDR(sc->nop_cmds[(sc->xctail+NTXBUF-1) % NTXBUF]);*/ 1938 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), 1939 IE_CMD_NOP_ADDR( 1940 sc->nop_cmds, 1941 (sc->xctail + NTXBUF - 1) % NTXBUF)); 1942 1943 if (i82586_start_cmd(sc, IE_CUC_START|IE_RUC_START, 0, 0, 0)) 1944 printf("%s: CU/RU command timed out\n", 1945 sc->sc_dev.dv_xname); 1946 } else { 1947 if (i82586_start_cmd(sc, IE_RUC_START, 0, 0, 0)) 1948 printf("%s: RU command timed out\n", 1949 sc->sc_dev.dv_xname); 1950 } 1951 } 1952 1953 static void 1954 iestop(sc) 1955 struct ie_softc *sc; 1956 { 1957 1958 if (i82586_start_cmd(sc, IE_RUC_SUSPEND | IE_CUC_SUSPEND, 0, 0, 0)) 1959 printf("%s: iestop: disable commands timed out\n", 1960 sc->sc_dev.dv_xname); 1961 } 1962 1963 int 1964 i82586_ioctl(ifp, cmd, data) 1965 register struct ifnet *ifp; 1966 u_long cmd; 1967 caddr_t data; 1968 { 1969 struct ie_softc *sc = ifp->if_softc; 1970 struct ifaddr *ifa = (struct ifaddr *)data; 1971 struct ifreq *ifr = (struct ifreq *)data; 1972 int s, error = 0; 1973 1974 s = splnet(); 1975 1976 switch(cmd) { 1977 1978 case SIOCSIFADDR: 1979 ifp->if_flags |= IFF_UP; 1980 1981 switch(ifa->ifa_addr->sa_family) { 1982 #ifdef INET 1983 case AF_INET: 1984 i82586_init(sc); 1985 arp_ifinit(ifp, ifa); 1986 break; 1987 #endif 1988 #ifdef NS 1989 /* XXX - This code is probably wrong. */ 1990 case AF_NS: 1991 { 1992 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1993 1994 if (ns_nullhost(*ina)) 1995 ina->x_host = 1996 *(union ns_host *)LLADDR(ifp->if_sadl); 1997 else 1998 bcopy(ina->x_host.c_host, 1999 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 2000 /* Set new address. */ 2001 i82586_init(sc); 2002 break; 2003 } 2004 #endif /* NS */ 2005 default: 2006 i82586_init(sc); 2007 break; 2008 } 2009 break; 2010 2011 case SIOCSIFFLAGS: 2012 sc->promisc = ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI); 2013 if ((ifp->if_flags & IFF_UP) == 0 && 2014 (ifp->if_flags & IFF_RUNNING) != 0) { 2015 /* 2016 * If interface is marked down and it is running, then 2017 * stop it. 2018 */ 2019 iestop(sc); 2020 ifp->if_flags &= ~IFF_RUNNING; 2021 } else if ((ifp->if_flags & IFF_UP) != 0 && 2022 (ifp->if_flags & IFF_RUNNING) == 0) { 2023 /* 2024 * If interface is marked up and it is stopped, then 2025 * start it. 2026 */ 2027 i82586_init(sc); 2028 } else { 2029 /* 2030 * Reset the interface to pick up changes in any other 2031 * flags that affect hardware registers. 2032 */ 2033 iestop(sc); 2034 i82586_init(sc); 2035 } 2036 #ifdef I82586_DEBUG 2037 if (ifp->if_flags & IFF_DEBUG) 2038 sc->sc_debug = IED_ALL; 2039 else 2040 sc->sc_debug = 0; 2041 #endif 2042 break; 2043 2044 case SIOCADDMULTI: 2045 case SIOCDELMULTI: 2046 error = (cmd == SIOCADDMULTI) ? 2047 ether_addmulti(ifr, &sc->sc_ethercom): 2048 ether_delmulti(ifr, &sc->sc_ethercom); 2049 2050 if (error == ENETRESET) { 2051 /* 2052 * Multicast list has changed; set the hardware filter 2053 * accordingly. 2054 */ 2055 ie_mc_reset(sc); 2056 error = 0; 2057 } 2058 break; 2059 2060 case SIOCGIFMEDIA: 2061 case SIOCSIFMEDIA: 2062 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 2063 break; 2064 2065 default: 2066 error = EINVAL; 2067 } 2068 splx(s); 2069 return (error); 2070 } 2071 2072 static void 2073 ie_mc_reset(sc) 2074 struct ie_softc *sc; 2075 { 2076 struct ether_multi *enm; 2077 struct ether_multistep step; 2078 int size; 2079 2080 /* 2081 * Step through the list of addresses. 2082 */ 2083 again: 2084 size = 0; 2085 sc->mcast_count = 0; 2086 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 2087 while (enm) { 2088 size += 6; 2089 if (sc->mcast_count >= IE_MAXMCAST || 2090 bcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { 2091 sc->sc_ethercom.ec_if.if_flags |= IFF_ALLMULTI; 2092 i82586_ioctl(&sc->sc_ethercom.ec_if, 2093 SIOCSIFFLAGS, (void *)0); 2094 return; 2095 } 2096 ETHER_NEXT_MULTI(step, enm); 2097 } 2098 2099 if (size > sc->mcast_addrs_size) { 2100 /* Need to allocate more space */ 2101 if (sc->mcast_addrs_size) 2102 free(sc->mcast_addrs, M_IPMADDR); 2103 sc->mcast_addrs = (char *) 2104 malloc(size, M_IPMADDR, M_WAITOK); 2105 sc->mcast_addrs_size = size; 2106 } 2107 2108 /* 2109 * We've got the space; now copy the addresses 2110 */ 2111 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 2112 while (enm) { 2113 if (sc->mcast_count >= IE_MAXMCAST) 2114 goto again; /* Just in case */ 2115 2116 bcopy(enm->enm_addrlo, &sc->mcast_addrs[sc->mcast_count], 6); 2117 sc->mcast_count++; 2118 ETHER_NEXT_MULTI(step, enm); 2119 } 2120 sc->want_mcsetup = 1; 2121 } 2122 2123 /* 2124 * Media change callback. 2125 */ 2126 int 2127 i82586_mediachange(ifp) 2128 struct ifnet *ifp; 2129 { 2130 struct ie_softc *sc = ifp->if_softc; 2131 2132 if (sc->sc_mediachange) 2133 return ((*sc->sc_mediachange)(sc)); 2134 return (EINVAL); 2135 } 2136 2137 /* 2138 * Media status callback. 2139 */ 2140 void 2141 i82586_mediastatus(ifp, ifmr) 2142 struct ifnet *ifp; 2143 struct ifmediareq *ifmr; 2144 { 2145 struct ie_softc *sc = ifp->if_softc; 2146 2147 if (sc->sc_mediastatus) 2148 (*sc->sc_mediastatus)(sc, ifmr); 2149 } 2150 2151 #ifdef I82586_DEBUG 2152 void 2153 print_rbd(sc, n) 2154 struct ie_softc *sc; 2155 int n; 2156 { 2157 2158 printf("RBD at %08x:\n status %04x, next %04x, buffer %lx\n" 2159 "length/EOL %04x\n", IE_RBD_ADDR(sc->rbds,n), 2160 sc->ie_bus_read16(sc, IE_RBD_STATUS(sc->rbds,n)), 2161 sc->ie_bus_read16(sc, IE_RBD_NEXT(sc->rbds,n)), 2162 (u_long)0,/*bus_space_read_4(sc->bt, sc->bh, IE_RBD_BUFADDR(sc->rbds,n)),-* XXX */ 2163 sc->ie_bus_read16(sc, IE_RBD_BUFLEN(sc->rbds,n))); 2164 } 2165 #endif 2166
Indexes created Mon Sep 29 21:09:56 GMT 2025