i82586.c revision 1.70
1 /* $NetBSD: i82586.c,v 1.70 2011/07/02 13:13:22 mrg 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1997 Paul Kranenburg. 34 * Copyright (c) 1992, 1993, University of Vermont and State 35 * Agricultural College. 36 * Copyright (c) 1992, 1993, Garrett A. Wollman. 37 * 38 * Portions: 39 * Copyright (c) 1994, 1995, Rafal K. Boni 40 * Copyright (c) 1990, 1991, William F. Jolitz 41 * Copyright (c) 1990, The Regents of the University of California 42 * 43 * All rights reserved. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of Vermont 56 * and State Agricultural College and Garrett A. Wollman, by William F. 57 * Jolitz, and by the University of California, Berkeley, Lawrence 58 * Berkeley Laboratory, and its contributors. 59 * 4. Neither the names of the Universities nor the names of the authors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR AUTHORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 */ 75 76 /* 77 * Intel 82586 Ethernet chip 78 * Register, bit, and structure definitions. 79 * 80 * Original StarLAN driver written by Garrett Wollman with reference to the 81 * Clarkson Packet Driver code for this chip written by Russ Nelson and others. 82 * 83 * BPF support code taken from hpdev/if_le.c, supplied with tcpdump. 84 * 85 * 3C507 support is loosely based on code donated to NetBSD by Rafal Boni. 86 * 87 * Majorly cleaned up and 3C507 code merged by Charles Hannum. 88 * 89 * Converted to SUN ie driver by Charles D. Cranor, 90 * October 1994, January 1995. 91 * This sun version based on i386 version 1.30. 92 */ 93 94 /* 95 * The i82586 is a very painful chip, found in sun3's, sun-4/100's 96 * sun-4/200's, and VME based suns. The byte order is all wrong for a 97 * SUN, making life difficult. Programming this chip is mostly the same, 98 * but certain details differ from system to system. This driver is 99 * written so that different "ie" interfaces can be controled by the same 100 * driver. 101 */ 102 103 /* 104 Mode of operation: 105 106 We run the 82586 in a standard Ethernet mode. We keep NFRAMES 107 received frame descriptors around for the receiver to use, and 108 NRXBUF associated receive buffer descriptors, both in a circular 109 list. Whenever a frame is received, we rotate both lists as 110 necessary. (The 586 treats both lists as a simple queue.) We also 111 keep a transmit command around so that packets can be sent off 112 quickly. 113 114 We configure the adapter in AL-LOC = 1 mode, which means that the 115 Ethernet/802.3 MAC header is placed at the beginning of the receive 116 buffer rather than being split off into various fields in the RFD. 117 This also means that we must include this header in the transmit 118 buffer as well. 119 120 By convention, all transmit commands, and only transmit commands, 121 shall have the I (IE_CMD_INTR) bit set in the command. This way, 122 when an interrupt arrives at i82586_intr(), it is immediately possible 123 to tell what precisely caused it. ANY OTHER command-sending 124 routines should run at splnet(), and should post an acknowledgement 125 to every interrupt they generate. 126 127 To save the expense of shipping a command to 82586 every time we 128 want to send a frame, we use a linked list of commands consisting 129 of alternate XMIT and NOP commands. The links of these elements 130 are manipulated (in iexmit()) such that the NOP command loops back 131 to itself whenever the following XMIT command is not yet ready to 132 go. Whenever an XMIT is ready, the preceding NOP link is pointed 133 at it, while its own link field points to the following NOP command. 134 Thus, a single transmit command sets off an interlocked traversal 135 of the xmit command chain, with the host processor in control of 136 the synchronization. 137 */ 138 139 #include <sys/cdefs.h> 140 __KERNEL_RCSID(0, "$NetBSD: i82586.c,v 1.70 2011/07/02 13:13:22 mrg Exp $"); 141 142 143 #include <sys/param.h> 144 #include <sys/systm.h> 145 #include <sys/mbuf.h> 146 #include <sys/socket.h> 147 #include <sys/ioctl.h> 148 #include <sys/errno.h> 149 #include <sys/syslog.h> 150 #include <sys/device.h> 151 152 #include <net/if.h> 153 #include <net/if_dl.h> 154 #include <net/if_types.h> 155 #include <net/if_media.h> 156 #include <net/if_ether.h> 157 158 #include <net/bpf.h> 159 #include <net/bpfdesc.h> 160 161 #include <sys/bus.h> 162 163 #include <dev/ic/i82586reg.h> 164 #include <dev/ic/i82586var.h> 165 166 void i82586_reset(struct ie_softc *, int); 167 void i82586_watchdog(struct ifnet *); 168 int i82586_init(struct ifnet *); 169 int i82586_ioctl(struct ifnet *, u_long, void *); 170 void i82586_start(struct ifnet *); 171 void i82586_stop(struct ifnet *, int); 172 173 174 int i82586_rint(struct ie_softc *, int); 175 int i82586_tint(struct ie_softc *, int); 176 177 int i82586_mediachange(struct ifnet *); 178 void i82586_mediastatus(struct ifnet *, struct ifmediareq *); 179 180 static int ie_readframe(struct ie_softc *, int); 181 static struct mbuf *ieget(struct ie_softc *, int, int); 182 static int i82586_get_rbd_list(struct ie_softc *, 183 u_int16_t *, u_int16_t *, int *); 184 static void i82586_release_rbd_list(struct ie_softc *, 185 u_int16_t, u_int16_t); 186 static int i82586_drop_frames(struct ie_softc *); 187 static int i82586_chk_rx_ring(struct ie_softc *); 188 189 static inline void ie_ack(struct ie_softc *, u_int); 190 static inline void iexmit(struct ie_softc *); 191 static void i82586_start_transceiver(struct ie_softc *); 192 193 static void i82586_count_errors(struct ie_softc *); 194 static void i82586_rx_errors(struct ie_softc *, int, int); 195 static void i82586_setup_bufs(struct ie_softc *); 196 static void setup_simple_command(struct ie_softc *, int, int); 197 static int ie_cfg_setup(struct ie_softc *, int, int, int); 198 static int ie_ia_setup(struct ie_softc *, int); 199 static void ie_run_tdr(struct ie_softc *, int); 200 static int ie_mc_setup(struct ie_softc *, int); 201 static void ie_mc_reset(struct ie_softc *); 202 static int i82586_start_cmd(struct ie_softc *, int, int, int, int); 203 static int i82586_cmd_wait(struct ie_softc *); 204 205 #if I82586_DEBUG 206 void print_rbd(struct ie_softc *, int); 207 #endif 208 209 static char* padbuf = NULL; 210 211 /* 212 * Front-ends call this function to attach to the MI driver. 213 * 214 * The front-end has responsibility for managing the ICP and ISCP 215 * structures. Both of these are opaque to us. Also, the front-end 216 * chooses a location for the SCB which is expected to be addressable 217 * (through `sc->scb') as an offset against the shared-memory bus handle. 218 * 219 * The following MD interface function must be setup by the front-end 220 * before calling here: 221 * 222 * hwreset - board dependent reset 223 * hwinit - board dependent initialization 224 * chan_attn - channel attention 225 * intrhook - board dependent interrupt processing 226 * memcopyin - shared memory copy: board to KVA 227 * memcopyout - shared memory copy: KVA to board 228 * ie_bus_read16 - read a sixteen-bit i82586 pointer 229 * ie_bus_write16 - write a sixteen-bit i82586 pointer 230 * ie_bus_write24 - write a twenty-four-bit i82586 pointer 231 * 232 */ 233 void 234 i82586_attach(struct ie_softc *sc, const char *name, u_int8_t *etheraddr, int *media, int nmedia, int defmedia) 235 { 236 int i; 237 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 238 239 strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); 240 ifp->if_softc = sc; 241 ifp->if_start = i82586_start; 242 ifp->if_ioctl = i82586_ioctl; 243 ifp->if_init = i82586_init; 244 ifp->if_stop = i82586_stop; 245 ifp->if_watchdog = i82586_watchdog; 246 ifp->if_flags = 247 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 248 IFQ_SET_READY(&ifp->if_snd); 249 250 /* Initialize media goo. */ 251 ifmedia_init(&sc->sc_media, 0, i82586_mediachange, i82586_mediastatus); 252 if (media != NULL) { 253 for (i = 0; i < nmedia; i++) 254 ifmedia_add(&sc->sc_media, media[i], 0, NULL); 255 ifmedia_set(&sc->sc_media, defmedia); 256 } else { 257 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 258 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 259 } 260 261 if (padbuf == NULL) { 262 padbuf = malloc(ETHER_MIN_LEN - ETHER_CRC_LEN, M_DEVBUF, 263 M_ZERO | M_NOWAIT); 264 if (padbuf == NULL) { 265 aprint_error_dev(sc->sc_dev, "can't allocate pad buffer\n"); 266 return; 267 } 268 } 269 270 /* Attach the interface. */ 271 if_attach(ifp); 272 ether_ifattach(ifp, etheraddr); 273 274 printf(" address %s, type %s\n", ether_sprintf(etheraddr), name); 275 } 276 277 278 /* 279 * Device timeout/watchdog routine. 280 * Entered if the device neglects to generate an interrupt after a 281 * transmit has been started on it. 282 */ 283 void 284 i82586_watchdog(struct ifnet *ifp) 285 { 286 struct ie_softc *sc = ifp->if_softc; 287 288 log(LOG_ERR, "%s: device timeout\n", device_xname(sc->sc_dev)); 289 ++ifp->if_oerrors; 290 291 i82586_reset(sc, 1); 292 } 293 294 static int 295 i82586_cmd_wait(struct ie_softc *sc) 296 { 297 /* spin on i82586 command acknowledge; wait at most 0.9 (!) seconds */ 298 int i, off; 299 u_int16_t cmd; 300 301 for (i = 0; i < 900000; i++) { 302 /* Read the command word */ 303 off = IE_SCB_CMD(sc->scb); 304 305 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 306 if ((cmd = sc->ie_bus_read16(sc, off)) == 0) 307 return (0); 308 delay(1); 309 } 310 311 off = IE_SCB_STATUS(sc->scb); 312 printf("i82586_cmd_wait: timo(%ssync): scb status: 0x%x, cmd: 0x%x\n", 313 sc->async_cmd_inprogress?"a":"", 314 sc->ie_bus_read16(sc, off), cmd); 315 316 return (1); /* Timeout */ 317 } 318 319 /* 320 * Send a command to the controller and wait for it to either complete 321 * or be accepted, depending on the command. If the command pointer 322 * is null, then pretend that the command is not an action command. 323 * If the command pointer is not null, and the command is an action 324 * command, wait for one of the MASK bits to turn on in the command's 325 * status field. 326 * If ASYNC is set, we just call the chip's attention and return. 327 * We may have to wait for the command's acceptance later though. 328 */ 329 static int 330 i82586_start_cmd(struct ie_softc *sc, int cmd, int iecmdbuf, int mask, int async) 331 { 332 int i; 333 int off; 334 335 if (sc->async_cmd_inprogress != 0) { 336 /* 337 * If previous command was issued asynchronously, wait 338 * for it now. 339 */ 340 if (i82586_cmd_wait(sc) != 0) 341 return (1); 342 sc->async_cmd_inprogress = 0; 343 } 344 345 off = IE_SCB_CMD(sc->scb); 346 sc->ie_bus_write16(sc, off, cmd); 347 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); 348 (sc->chan_attn)(sc, CARD_RESET); 349 350 if (async != 0) { 351 sc->async_cmd_inprogress = 1; 352 return (0); 353 } 354 355 if (IE_ACTION_COMMAND(cmd) && iecmdbuf) { 356 int status; 357 /* 358 * Now spin-lock waiting for status. This is not a very nice 359 * thing to do, and can kill performance pretty well... 360 * According to the packet driver, the minimum timeout 361 * should be .369 seconds. 362 */ 363 for (i = 0; i < 369000; i++) { 364 /* Read the command status */ 365 off = IE_CMD_COMMON_STATUS(iecmdbuf); 366 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 367 status = sc->ie_bus_read16(sc, off); 368 if (status & mask) 369 return (0); 370 delay(1); 371 } 372 373 } else { 374 /* 375 * Otherwise, just wait for the command to be accepted. 376 */ 377 return (i82586_cmd_wait(sc)); 378 } 379 380 /* Timeout */ 381 return (1); 382 } 383 384 /* 385 * Interrupt Acknowledge. 386 */ 387 static inline void 388 ie_ack(struct ie_softc *sc, u_int mask) 389 /* mask: in native byte-order */ 390 { 391 u_int status; 392 393 IE_BUS_BARRIER(sc, 0, 0, BUS_SPACE_BARRIER_READ); 394 status = sc->ie_bus_read16(sc, IE_SCB_STATUS(sc->scb)); 395 i82586_start_cmd(sc, status & mask, 0, 0, 0); 396 if (sc->intrhook) 397 sc->intrhook(sc, INTR_ACK); 398 } 399 400 /* 401 * Transfer accumulated chip error counters to IF. 402 */ 403 static inline void 404 i82586_count_errors(struct ie_softc *sc) 405 { 406 int scb = sc->scb; 407 408 sc->sc_ethercom.ec_if.if_ierrors += 409 sc->ie_bus_read16(sc, IE_SCB_ERRCRC(scb)) + 410 sc->ie_bus_read16(sc, IE_SCB_ERRALN(scb)) + 411 sc->ie_bus_read16(sc, IE_SCB_ERRRES(scb)) + 412 sc->ie_bus_read16(sc, IE_SCB_ERROVR(scb)); 413 414 /* Clear error counters */ 415 sc->ie_bus_write16(sc, IE_SCB_ERRCRC(scb), 0); 416 sc->ie_bus_write16(sc, IE_SCB_ERRALN(scb), 0); 417 sc->ie_bus_write16(sc, IE_SCB_ERRRES(scb), 0); 418 sc->ie_bus_write16(sc, IE_SCB_ERROVR(scb), 0); 419 } 420 421 static void 422 i82586_rx_errors(struct ie_softc *sc, int fn, int status) 423 { 424 char bits[128]; 425 snprintb(bits, sizeof(bits), IE_FD_STATUSBITS, status); 426 log(LOG_ERR, "%s: rx error (frame# %d): %s\n", 427 device_xname(sc->sc_dev), fn, bits); 428 429 } 430 431 /* 432 * i82586 interrupt entry point. 433 */ 434 int 435 i82586_intr(void *v) 436 { 437 struct ie_softc *sc = v; 438 u_int status; 439 int off; 440 441 /* 442 * Implementation dependent interrupt handling. 443 */ 444 if (sc->intrhook) 445 (sc->intrhook)(sc, INTR_ENTER); 446 447 off = IE_SCB_STATUS(sc->scb); 448 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 449 status = sc->ie_bus_read16(sc, off) & IE_ST_WHENCE; 450 451 if ((status & IE_ST_WHENCE) == 0) { 452 if (sc->intrhook) 453 (sc->intrhook)(sc, INTR_EXIT); 454 455 return (0); 456 } 457 458 loop: 459 /* Ack interrupts FIRST in case we receive more during the ISR. */ 460 #if 0 461 ie_ack(sc, status & IE_ST_WHENCE); 462 #endif 463 i82586_start_cmd(sc, status & IE_ST_WHENCE, 0, 0, 1); 464 465 if (status & (IE_ST_FR | IE_ST_RNR)) 466 if (i82586_rint(sc, status) != 0) 467 goto reset; 468 469 if (status & IE_ST_CX) 470 if (i82586_tint(sc, status) != 0) 471 goto reset; 472 473 #if I82586_DEBUG 474 if ((status & IE_ST_CNA) && (sc->sc_debug & IED_CNA)) 475 printf("%s: cna; status=0x%x\n", device_xname(sc->sc_dev), status); 476 #endif 477 if (sc->intrhook) 478 (sc->intrhook)(sc, INTR_LOOP); 479 480 /* 481 * Interrupt ACK was posted asynchronously; wait for 482 * completion here before reading SCB status again. 483 * 484 * If ACK fails, try to reset the chip, in hopes that 485 * it helps. 486 */ 487 if (i82586_cmd_wait(sc) != 0) 488 goto reset; 489 490 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 491 status = sc->ie_bus_read16(sc, off); 492 if ((status & IE_ST_WHENCE) != 0) 493 goto loop; 494 495 out: 496 if (sc->intrhook) 497 (sc->intrhook)(sc, INTR_EXIT); 498 return (1); 499 500 reset: 501 i82586_cmd_wait(sc); 502 i82586_reset(sc, 1); 503 goto out; 504 505 } 506 507 /* 508 * Process a received-frame interrupt. 509 */ 510 int 511 i82586_rint(struct ie_softc *sc, int scbstatus) 512 { 513 static int timesthru = 1024; 514 int i, status, off; 515 516 #if I82586_DEBUG 517 if (sc->sc_debug & IED_RINT) 518 printf("%s: rint: status 0x%x\n", 519 device_xname(sc->sc_dev), scbstatus); 520 #endif 521 522 for (;;) { 523 int drop = 0; 524 525 i = sc->rfhead; 526 off = IE_RFRAME_STATUS(sc->rframes, i); 527 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 528 status = sc->ie_bus_read16(sc, off); 529 530 #if I82586_DEBUG 531 if (sc->sc_debug & IED_RINT) 532 printf("%s: rint: frame(%d) status 0x%x\n", 533 device_xname(sc->sc_dev), i, status); 534 #endif 535 if ((status & IE_FD_COMPLETE) == 0) { 536 if ((status & IE_FD_OK) != 0) { 537 printf("%s: rint: weird: ", 538 device_xname(sc->sc_dev)); 539 i82586_rx_errors(sc, i, status); 540 break; 541 } 542 if (--timesthru == 0) { 543 /* Account the accumulated errors */ 544 i82586_count_errors(sc); 545 timesthru = 1024; 546 } 547 break; 548 } else if ((status & IE_FD_OK) == 0) { 549 /* 550 * If the chip is configured to automatically 551 * discard bad frames, the only reason we can 552 * get here is an "out-of-resource" condition. 553 */ 554 i82586_rx_errors(sc, i, status); 555 drop = 1; 556 } 557 558 #if I82586_DEBUG 559 if ((status & IE_FD_BUSY) != 0) 560 printf("%s: rint: frame(%d) busy; status=0x%x\n", 561 device_xname(sc->sc_dev), i, status); 562 #endif 563 564 565 /* 566 * Advance the RFD list, since we're done with 567 * this descriptor. 568 */ 569 570 /* Clear frame status */ 571 sc->ie_bus_write16(sc, off, 0); 572 573 /* Put fence at this frame (the head) */ 574 off = IE_RFRAME_LAST(sc->rframes, i); 575 sc->ie_bus_write16(sc, off, IE_FD_EOL|IE_FD_SUSP); 576 577 /* and clear RBD field */ 578 off = IE_RFRAME_BUFDESC(sc->rframes, i); 579 sc->ie_bus_write16(sc, off, 0xffff); 580 581 /* Remove fence from current tail */ 582 off = IE_RFRAME_LAST(sc->rframes, sc->rftail); 583 sc->ie_bus_write16(sc, off, 0); 584 585 if (++sc->rftail == sc->nframes) 586 sc->rftail = 0; 587 if (++sc->rfhead == sc->nframes) 588 sc->rfhead = 0; 589 590 /* Pull the frame off the board */ 591 if (drop) { 592 i82586_drop_frames(sc); 593 if ((status & IE_FD_RNR) != 0) 594 sc->rnr_expect = 1; 595 sc->sc_ethercom.ec_if.if_ierrors++; 596 } else if (ie_readframe(sc, i) != 0) 597 return (1); 598 } 599 600 if ((scbstatus & IE_ST_RNR) != 0) { 601 602 /* 603 * Receiver went "Not Ready". We try to figure out 604 * whether this was an expected event based on past 605 * frame status values. 606 */ 607 608 if ((scbstatus & IE_RUS_SUSPEND) != 0) { 609 /* 610 * We use the "suspend on last frame" flag. 611 * Send a RU RESUME command in response, since 612 * we should have dealt with all completed frames 613 * by now. 614 */ 615 printf("RINT: SUSPENDED; scbstatus=0x%x\n", 616 scbstatus); 617 if (i82586_start_cmd(sc, IE_RUC_RESUME, 0, 0, 0) == 0) 618 return (0); 619 aprint_error_dev(sc->sc_dev, "RU RESUME command timed out\n"); 620 return (1); /* Ask for a reset */ 621 } 622 623 if (sc->rnr_expect != 0) { 624 /* 625 * The RNR condition was announced in the previously 626 * completed frame. Assume the receive ring is Ok, 627 * so restart the receiver without further delay. 628 */ 629 i82586_start_transceiver(sc); 630 sc->rnr_expect = 0; 631 return (0); 632 633 } else if ((scbstatus & IE_RUS_NOSPACE) != 0) { 634 /* 635 * We saw no previous IF_FD_RNR flag. 636 * We check our ring invariants and, if ok, 637 * just restart the receiver at the current 638 * point in the ring. 639 */ 640 if (i82586_chk_rx_ring(sc) != 0) 641 return (1); 642 643 i82586_start_transceiver(sc); 644 sc->sc_ethercom.ec_if.if_ierrors++; 645 return (0); 646 } else 647 printf("%s: receiver not ready; scbstatus=0x%x\n", 648 device_xname(sc->sc_dev), scbstatus); 649 650 sc->sc_ethercom.ec_if.if_ierrors++; 651 return (1); /* Ask for a reset */ 652 } 653 654 return (0); 655 } 656 657 /* 658 * Process a command-complete interrupt. These are only generated by the 659 * transmission of frames. This routine is deceptively simple, since most 660 * of the real work is done by i82586_start(). 661 */ 662 int 663 i82586_tint(struct ie_softc *sc, int scbstatus) 664 { 665 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 666 int status; 667 668 ifp->if_timer = 0; 669 ifp->if_flags &= ~IFF_OACTIVE; 670 671 #if I82586_DEBUG 672 if (sc->xmit_busy <= 0) { 673 printf("i82586_tint: WEIRD: xmit_busy=%d, xctail=%d, xchead=%d\n", 674 sc->xmit_busy, sc->xctail, sc->xchead); 675 return (0); 676 } 677 #endif 678 679 status = sc->ie_bus_read16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, 680 sc->xctail)); 681 682 #if I82586_DEBUG 683 if (sc->sc_debug & IED_TINT) 684 printf("%s: tint: SCB status 0x%x; xmit status 0x%x\n", 685 device_xname(sc->sc_dev), scbstatus, status); 686 #endif 687 688 if ((status & IE_STAT_COMPL) == 0 || (status & IE_STAT_BUSY)) { 689 printf("i82586_tint: command still busy; status=0x%x; tail=%d\n", 690 status, sc->xctail); 691 printf("iestatus = 0x%x\n", scbstatus); 692 } 693 694 if (status & IE_STAT_OK) { 695 ifp->if_opackets++; 696 ifp->if_collisions += (status & IE_XS_MAXCOLL); 697 } else { 698 ifp->if_oerrors++; 699 /* 700 * Check SQE and DEFERRED? 701 * What if more than one bit is set? 702 */ 703 if (status & IE_STAT_ABORT) 704 aprint_error_dev(sc->sc_dev, "send aborted\n"); 705 else if (status & IE_XS_NOCARRIER) 706 aprint_error_dev(sc->sc_dev, "no carrier\n"); 707 else if (status & IE_XS_LOSTCTS) 708 aprint_error_dev(sc->sc_dev, "lost CTS\n"); 709 else if (status & IE_XS_UNDERRUN) 710 aprint_error_dev(sc->sc_dev, "DMA underrun\n"); 711 else if (status & IE_XS_EXCMAX) { 712 aprint_error_dev(sc->sc_dev, "too many collisions\n"); 713 sc->sc_ethercom.ec_if.if_collisions += 16; 714 } 715 } 716 717 /* 718 * If multicast addresses were added or deleted while transmitting, 719 * ie_mc_reset() set the want_mcsetup flag indicating that we 720 * should do it. 721 */ 722 if (sc->want_mcsetup) { 723 ie_mc_setup(sc, IE_XBUF_ADDR(sc, sc->xctail)); 724 sc->want_mcsetup = 0; 725 } 726 727 /* Done with the buffer. */ 728 sc->xmit_busy--; 729 sc->xctail = (sc->xctail + 1) % NTXBUF; 730 731 /* Start the next packet, if any, transmitting. */ 732 if (sc->xmit_busy > 0) 733 iexmit(sc); 734 735 i82586_start(ifp); 736 return (0); 737 } 738 739 /* 740 * Get a range of receive buffer descriptors that represent one packet. 741 */ 742 static int 743 i82586_get_rbd_list(struct ie_softc *sc, u_int16_t *start, u_int16_t *end, int *pktlen) 744 { 745 int off, rbbase = sc->rbds; 746 int rbindex, count = 0; 747 int plen = 0; 748 int rbdstatus; 749 750 *start = rbindex = sc->rbhead; 751 752 do { 753 off = IE_RBD_STATUS(rbbase, rbindex); 754 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 755 rbdstatus = sc->ie_bus_read16(sc, off); 756 if ((rbdstatus & IE_RBD_USED) == 0) { 757 /* 758 * This means we are somehow out of sync. So, we 759 * reset the adapter. 760 */ 761 #if I82586_DEBUG 762 print_rbd(sc, rbindex); 763 #endif 764 log(LOG_ERR, 765 "%s: receive descriptors out of sync at %d\n", 766 device_xname(sc->sc_dev), rbindex); 767 return (0); 768 } 769 plen += (rbdstatus & IE_RBD_CNTMASK); 770 771 if (++rbindex == sc->nrxbuf) 772 rbindex = 0; 773 774 ++count; 775 } while ((rbdstatus & IE_RBD_LAST) == 0); 776 *end = rbindex; 777 *pktlen = plen; 778 return (count); 779 } 780 781 782 /* 783 * Release a range of receive buffer descriptors after we've copied the packet. 784 */ 785 static void 786 i82586_release_rbd_list(struct ie_softc *sc, u_int16_t start, u_int16_t end) 787 { 788 int off, rbbase = sc->rbds; 789 int rbindex = start; 790 791 do { 792 /* Clear buffer status */ 793 off = IE_RBD_STATUS(rbbase, rbindex); 794 sc->ie_bus_write16(sc, off, 0); 795 if (++rbindex == sc->nrxbuf) 796 rbindex = 0; 797 } while (rbindex != end); 798 799 /* Mark EOL at new tail */ 800 rbindex = ((rbindex == 0) ? sc->nrxbuf : rbindex) - 1; 801 off = IE_RBD_BUFLEN(rbbase, rbindex); 802 sc->ie_bus_write16(sc, off, IE_RBUF_SIZE|IE_RBD_EOL); 803 804 /* Remove EOL from current tail */ 805 off = IE_RBD_BUFLEN(rbbase, sc->rbtail); 806 sc->ie_bus_write16(sc, off, IE_RBUF_SIZE); 807 808 /* New head & tail pointer */ 809 /* hmm, why have both? head is always (tail + 1) % NRXBUF */ 810 sc->rbhead = end; 811 sc->rbtail = rbindex; 812 } 813 814 /* 815 * Drop the packet at the head of the RX buffer ring. 816 * Called if the frame descriptor reports an error on this packet. 817 * Returns 1 if the buffer descriptor ring appears to be corrupt; 818 * and 0 otherwise. 819 */ 820 static int 821 i82586_drop_frames(struct ie_softc *sc) 822 { 823 u_int16_t bstart, bend; 824 int pktlen; 825 826 if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) 827 return (1); 828 i82586_release_rbd_list(sc, bstart, bend); 829 return (0); 830 } 831 832 /* 833 * Check the RX frame & buffer descriptor lists for our invariants, 834 * i.e.: EOL bit set iff. it is pointed at by the r*tail pointer. 835 * 836 * Called when the receive unit has stopped unexpectedly. 837 * Returns 1 if an inconsistency is detected; 0 otherwise. 838 * 839 * The Receive Unit is expected to be NOT RUNNING. 840 */ 841 static int 842 i82586_chk_rx_ring(struct ie_softc *sc) 843 { 844 int n, off, val; 845 846 for (n = 0; n < sc->nrxbuf; n++) { 847 off = IE_RBD_BUFLEN(sc->rbds, n); 848 val = sc->ie_bus_read16(sc, off); 849 if ((n == sc->rbtail) ^ ((val & IE_RBD_EOL) != 0)) { 850 /* `rbtail' and EOL flag out of sync */ 851 log(LOG_ERR, 852 "%s: rx buffer descriptors out of sync at %d\n", 853 device_xname(sc->sc_dev), n); 854 return (1); 855 } 856 857 /* Take the opportunity to clear the status fields here ? */ 858 } 859 860 for (n = 0; n < sc->nframes; n++) { 861 off = IE_RFRAME_LAST(sc->rframes, n); 862 val = sc->ie_bus_read16(sc, off); 863 if ((n == sc->rftail) ^ ((val & (IE_FD_EOL|IE_FD_SUSP)) != 0)) { 864 /* `rftail' and EOL flag out of sync */ 865 log(LOG_ERR, 866 "%s: rx frame list out of sync at %d\n", 867 device_xname(sc->sc_dev), n); 868 return (1); 869 } 870 } 871 872 return (0); 873 } 874 875 /* 876 * Read data off the interface, and turn it into an mbuf chain. 877 * 878 * This code is DRAMATICALLY different from the previous version; this 879 * version tries to allocate the entire mbuf chain up front, given the 880 * length of the data available. This enables us to allocate mbuf 881 * clusters in many situations where before we would have had a long 882 * chain of partially-full mbufs. This should help to speed up the 883 * operation considerably. (Provided that it works, of course.) 884 */ 885 static inline struct mbuf * 886 ieget(struct ie_softc *sc, int head, int totlen) 887 { 888 struct mbuf *m, *m0, *newm; 889 int len, resid; 890 int thisrboff, thismboff; 891 struct ether_header eh; 892 893 /* 894 * Snarf the Ethernet header. 895 */ 896 (sc->memcopyin)(sc, &eh, IE_RBUF_ADDR(sc, head), 897 sizeof(struct ether_header)); 898 899 resid = totlen; 900 901 MGETHDR(m0, M_DONTWAIT, MT_DATA); 902 if (m0 == 0) 903 return (0); 904 m0->m_pkthdr.rcvif = &sc->sc_ethercom.ec_if; 905 m0->m_pkthdr.len = totlen; 906 len = MHLEN; 907 m = m0; 908 909 /* 910 * This loop goes through and allocates mbufs for all the data we will 911 * be copying in. It does not actually do the copying yet. 912 */ 913 while (totlen > 0) { 914 if (totlen >= MINCLSIZE) { 915 MCLGET(m, M_DONTWAIT); 916 if ((m->m_flags & M_EXT) == 0) 917 goto bad; 918 len = MCLBYTES; 919 } 920 921 if (m == m0) { 922 char *newdata = (char *) 923 ALIGN(m->m_data + sizeof(struct ether_header)) - 924 sizeof(struct ether_header); 925 len -= newdata - m->m_data; 926 m->m_data = newdata; 927 } 928 929 m->m_len = len = min(totlen, len); 930 931 totlen -= len; 932 if (totlen > 0) { 933 MGET(newm, M_DONTWAIT, MT_DATA); 934 if (newm == 0) 935 goto bad; 936 len = MLEN; 937 m = m->m_next = newm; 938 } 939 } 940 941 m = m0; 942 thismboff = 0; 943 944 /* 945 * Copy the Ethernet header into the mbuf chain. 946 */ 947 memcpy(mtod(m, void *), &eh, sizeof(struct ether_header)); 948 thismboff = sizeof(struct ether_header); 949 thisrboff = sizeof(struct ether_header); 950 resid -= sizeof(struct ether_header); 951 952 /* 953 * Now we take the mbuf chain (hopefully only one mbuf most of the 954 * time) and stuff the data into it. There are no possible failures 955 * at or after this point. 956 */ 957 while (resid > 0) { 958 int thisrblen = IE_RBUF_SIZE - thisrboff, 959 thismblen = m->m_len - thismboff; 960 len = min(thisrblen, thismblen); 961 962 (sc->memcopyin)(sc, mtod(m, char *) + thismboff, 963 IE_RBUF_ADDR(sc,head) + thisrboff, 964 (u_int)len); 965 resid -= len; 966 967 if (len == thismblen) { 968 m = m->m_next; 969 thismboff = 0; 970 } else 971 thismboff += len; 972 973 if (len == thisrblen) { 974 if (++head == sc->nrxbuf) 975 head = 0; 976 thisrboff = 0; 977 } else 978 thisrboff += len; 979 } 980 981 /* 982 * Unless something changed strangely while we were doing the copy, 983 * we have now copied everything in from the shared memory. 984 * This means that we are done. 985 */ 986 return (m0); 987 988 bad: 989 m_freem(m0); 990 return (0); 991 } 992 993 /* 994 * Read frame NUM from unit UNIT (pre-cached as IE). 995 * 996 * This routine reads the RFD at NUM, and copies in the buffers from the list 997 * of RBD, then rotates the RBD list so that the receiver doesn't start 998 * complaining. Trailers are DROPPED---there's no point in wasting time 999 * on confusing code to deal with them. Hopefully, this machine will 1000 * never ARP for trailers anyway. 1001 */ 1002 static int 1003 ie_readframe( 1004 struct ie_softc *sc, 1005 int num) /* frame number to read */ 1006 { 1007 struct mbuf *m; 1008 u_int16_t bstart, bend; 1009 int pktlen; 1010 1011 if (i82586_get_rbd_list(sc, &bstart, &bend, &pktlen) == 0) { 1012 sc->sc_ethercom.ec_if.if_ierrors++; 1013 return (1); 1014 } 1015 1016 m = ieget(sc, bstart, pktlen); 1017 i82586_release_rbd_list(sc, bstart, bend); 1018 1019 if (m == 0) { 1020 sc->sc_ethercom.ec_if.if_ierrors++; 1021 return (0); 1022 } 1023 1024 #if I82586_DEBUG 1025 if (sc->sc_debug & IED_READFRAME) { 1026 struct ether_header *eh = mtod(m, struct ether_header *); 1027 1028 printf("%s: frame from ether %s type 0x%x len %d\n", 1029 device_xname(sc->sc_dev), 1030 ether_sprintf(eh->ether_shost), 1031 (u_int)ntohs(eh->ether_type), 1032 pktlen); 1033 } 1034 #endif 1035 1036 /* Pass it up. */ 1037 bpf_mtap(&sc->sc_ethercom.ec_if, m); 1038 1039 /* 1040 * Finally pass this packet up to higher layers. 1041 */ 1042 (*sc->sc_ethercom.ec_if.if_input)(&sc->sc_ethercom.ec_if, m); 1043 sc->sc_ethercom.ec_if.if_ipackets++; 1044 return (0); 1045 } 1046 1047 1048 /* 1049 * Setup all necessary artifacts for an XMIT command, and then pass the XMIT 1050 * command to the chip to be executed. 1051 */ 1052 static inline void 1053 iexmit(struct ie_softc *sc) 1054 { 1055 int off; 1056 int cur, prev; 1057 1058 cur = sc->xctail; 1059 1060 #if I82586_DEBUG 1061 if (sc->sc_debug & IED_XMIT) 1062 printf("%s: xmit buffer %d\n", device_xname(sc->sc_dev), cur); 1063 #endif 1064 1065 /* 1066 * Setup the transmit command. 1067 */ 1068 sc->ie_bus_write16(sc, IE_CMD_XMIT_DESC(sc->xmit_cmds, cur), 1069 IE_XBD_ADDR(sc->xbds, cur)); 1070 1071 sc->ie_bus_write16(sc, IE_CMD_XMIT_STATUS(sc->xmit_cmds, cur), 0); 1072 1073 if (sc->do_xmitnopchain) { 1074 /* 1075 * Gate this XMIT command to the following NOP 1076 */ 1077 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds, cur), 1078 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1079 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1080 IE_CMD_XMIT | IE_CMD_INTR); 1081 1082 /* 1083 * Loopback at following NOP 1084 */ 1085 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, cur), 0); 1086 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur), 1087 IE_CMD_NOP_ADDR(sc->nop_cmds, cur)); 1088 1089 /* 1090 * Gate preceding NOP to this XMIT command 1091 */ 1092 prev = (cur + NTXBUF - 1) % NTXBUF; 1093 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, prev), 0); 1094 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev), 1095 IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1096 1097 off = IE_SCB_STATUS(sc->scb); 1098 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 1099 if ((sc->ie_bus_read16(sc, off) & IE_CUS_ACTIVE) == 0) { 1100 printf("iexmit: CU not active\n"); 1101 i82586_start_transceiver(sc); 1102 } 1103 } else { 1104 sc->ie_bus_write16(sc, IE_CMD_XMIT_LINK(sc->xmit_cmds,cur), 1105 0xffff); 1106 1107 sc->ie_bus_write16(sc, IE_CMD_XMIT_CMD(sc->xmit_cmds, cur), 1108 IE_CMD_XMIT | IE_CMD_INTR | IE_CMD_LAST); 1109 1110 off = IE_SCB_CMDLST(sc->scb); 1111 sc->ie_bus_write16(sc, off, IE_CMD_XMIT_ADDR(sc->xmit_cmds, cur)); 1112 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 1113 1114 if (i82586_start_cmd(sc, IE_CUC_START, 0, 0, 1)) 1115 aprint_error_dev(sc->sc_dev, "iexmit: start xmit command timed out\n"); 1116 } 1117 1118 sc->sc_ethercom.ec_if.if_timer = 5; 1119 } 1120 1121 1122 /* 1123 * Start transmission on an interface. 1124 */ 1125 void 1126 i82586_start(struct ifnet *ifp) 1127 { 1128 struct ie_softc *sc = ifp->if_softc; 1129 struct mbuf *m0, *m; 1130 int buffer, head, xbase; 1131 u_short len; 1132 int s; 1133 1134 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 1135 return; 1136 1137 for (;;) { 1138 if (sc->xmit_busy == NTXBUF) { 1139 ifp->if_flags |= IFF_OACTIVE; 1140 break; 1141 } 1142 1143 head = sc->xchead; 1144 xbase = sc->xbds; 1145 1146 IFQ_DEQUEUE(&ifp->if_snd, m0); 1147 if (m0 == 0) 1148 break; 1149 1150 /* We need to use m->m_pkthdr.len, so require the header */ 1151 if ((m0->m_flags & M_PKTHDR) == 0) 1152 panic("i82586_start: no header mbuf"); 1153 1154 /* Tap off here if there is a BPF listener. */ 1155 bpf_mtap(ifp, m0); 1156 1157 #if I82586_DEBUG 1158 if (sc->sc_debug & IED_ENQ) 1159 printf("%s: fill buffer %d\n", device_xname(sc->sc_dev), 1160 sc->xchead); 1161 #endif 1162 1163 if (m0->m_pkthdr.len > IE_TBUF_SIZE) 1164 printf("%s: tbuf overflow\n", device_xname(sc->sc_dev)); 1165 1166 buffer = IE_XBUF_ADDR(sc, head); 1167 for (m = m0; m != 0; m = m->m_next) { 1168 (sc->memcopyout)(sc, mtod(m,void *), buffer, m->m_len); 1169 buffer += m->m_len; 1170 } 1171 len = m0->m_pkthdr.len; 1172 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN) { 1173 (sc->memcopyout)(sc, padbuf, buffer, 1174 ETHER_MIN_LEN - ETHER_CRC_LEN - len); 1175 buffer += ETHER_MIN_LEN -ETHER_CRC_LEN - len; 1176 len = ETHER_MIN_LEN - ETHER_CRC_LEN; 1177 } 1178 m_freem(m0); 1179 1180 /* 1181 * Setup the transmit buffer descriptor here, while we 1182 * know the packet's length. 1183 */ 1184 sc->ie_bus_write16(sc, IE_XBD_FLAGS(xbase, head), 1185 len | IE_TBD_EOL); 1186 sc->ie_bus_write16(sc, IE_XBD_NEXT(xbase, head), 0xffff); 1187 sc->ie_bus_write24(sc, IE_XBD_BUF(xbase, head), 1188 IE_XBUF_ADDR(sc, head)); 1189 1190 if (++head == NTXBUF) 1191 head = 0; 1192 sc->xchead = head; 1193 1194 s = splnet(); 1195 /* Start the first packet transmitting. */ 1196 if (sc->xmit_busy == 0) 1197 iexmit(sc); 1198 1199 sc->xmit_busy++; 1200 splx(s); 1201 } 1202 } 1203 1204 /* 1205 * Probe IE's ram setup [ Move all this into MD front-end!? ] 1206 * Use only if SCP and ISCP represent offsets into shared ram space. 1207 */ 1208 int 1209 i82586_proberam(struct ie_softc *sc) 1210 { 1211 int result, off; 1212 1213 /* Put in 16-bit mode */ 1214 off = IE_SCP_BUS_USE(sc->scp); 1215 sc->ie_bus_write16(sc, off, IE_SYSBUS_16BIT); 1216 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); 1217 1218 /* Set the ISCP `busy' bit */ 1219 off = IE_ISCP_BUSY(sc->iscp); 1220 sc->ie_bus_write16(sc, off, 1); 1221 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_WRITE); 1222 1223 if (sc->hwreset) 1224 (sc->hwreset)(sc, CHIP_PROBE); 1225 1226 (sc->chan_attn) (sc, CHIP_PROBE); 1227 1228 delay(100); /* wait a while... */ 1229 1230 /* Read back the ISCP `busy' bit; it should be clear by now */ 1231 off = IE_ISCP_BUSY(sc->iscp); 1232 IE_BUS_BARRIER(sc, off, 2, BUS_SPACE_BARRIER_READ); 1233 result = sc->ie_bus_read16(sc, off) == 0; 1234 1235 /* Acknowledge any interrupts we may have caused. */ 1236 ie_ack(sc, IE_ST_WHENCE); 1237 1238 return (result); 1239 } 1240 1241 void 1242 i82586_reset(struct ie_softc *sc, int hard) 1243 { 1244 int s = splnet(); 1245 1246 if (hard) 1247 printf("%s: reset\n", device_xname(sc->sc_dev)); 1248 1249 /* Clear OACTIVE in case we're called from watchdog (frozen xmit). */ 1250 sc->sc_ethercom.ec_if.if_timer = 0; 1251 sc->sc_ethercom.ec_if.if_flags &= ~IFF_OACTIVE; 1252 1253 /* 1254 * Stop i82586 dead in its tracks. 1255 */ 1256 if (i82586_start_cmd(sc, IE_RUC_ABORT | IE_CUC_ABORT, 0, 0, 0)) 1257 aprint_error_dev(sc->sc_dev, "abort commands timed out\n"); 1258 1259 /* 1260 * This can really slow down the i82586_reset() on some cards, but it's 1261 * necessary to unwedge other ones (eg, the Sun VME ones) from certain 1262 * lockups. 1263 */ 1264 if (hard && sc->hwreset) 1265 (sc->hwreset)(sc, CARD_RESET); 1266 1267 delay(100); 1268 ie_ack(sc, IE_ST_WHENCE); 1269 1270 if ((sc->sc_ethercom.ec_if.if_flags & IFF_UP) != 0) { 1271 int retries=0; /* XXX - find out why init sometimes fails */ 1272 while (retries++ < 2) 1273 if (i82586_init(&sc->sc_ethercom.ec_if) == 0) 1274 break; 1275 } 1276 1277 splx(s); 1278 } 1279 1280 1281 static void 1282 setup_simple_command(struct ie_softc *sc, int cmd, int cmdbuf) 1283 { 1284 /* Setup a simple command */ 1285 sc->ie_bus_write16(sc, IE_CMD_COMMON_STATUS(cmdbuf), 0); 1286 sc->ie_bus_write16(sc, IE_CMD_COMMON_CMD(cmdbuf), cmd | IE_CMD_LAST); 1287 sc->ie_bus_write16(sc, IE_CMD_COMMON_LINK(cmdbuf), 0xffff); 1288 1289 /* Assign the command buffer to the SCB command list */ 1290 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), cmdbuf); 1291 } 1292 1293 /* 1294 * Run the time-domain reflectometer. 1295 */ 1296 static void 1297 ie_run_tdr(struct ie_softc *sc, int cmd) 1298 { 1299 int result; 1300 1301 setup_simple_command(sc, IE_CMD_TDR, cmd); 1302 sc->ie_bus_write16(sc, IE_CMD_TDR_TIME(cmd), 0); 1303 1304 if (i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0) || 1305 (sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)) & IE_STAT_OK) == 0) 1306 result = 0x10000; /* XXX */ 1307 else 1308 result = sc->ie_bus_read16(sc, IE_CMD_TDR_TIME(cmd)); 1309 1310 /* Squash any pending interrupts */ 1311 ie_ack(sc, IE_ST_WHENCE); 1312 1313 if (result & IE_TDR_SUCCESS) 1314 return; 1315 1316 if (result & 0x10000) 1317 aprint_error_dev(sc->sc_dev, "TDR command failed\n"); 1318 else if (result & IE_TDR_XCVR) 1319 aprint_error_dev(sc->sc_dev, "transceiver problem\n"); 1320 else if (result & IE_TDR_OPEN) 1321 aprint_error_dev(sc->sc_dev, "TDR detected incorrect termination %d clocks away\n", 1322 result & IE_TDR_TIME); 1323 else if (result & IE_TDR_SHORT) 1324 aprint_error_dev(sc->sc_dev, "TDR detected a short circuit %d clocks away\n", 1325 result & IE_TDR_TIME); 1326 else 1327 aprint_error_dev(sc->sc_dev, "TDR returned unknown status 0x%x\n", 1328 result); 1329 } 1330 1331 1332 /* 1333 * i82586_setup_bufs: set up the buffers 1334 * 1335 * We have a block of KVA at sc->buf_area which is of size sc->buf_area_sz. 1336 * this is to be used for the buffers. The chip indexs its control data 1337 * structures with 16 bit offsets, and it indexes actual buffers with 1338 * 24 bit addresses. So we should allocate control buffers first so that 1339 * we don't overflow the 16 bit offset field. The number of transmit 1340 * buffers is fixed at compile time. 1341 * 1342 */ 1343 static void 1344 i82586_setup_bufs(struct ie_softc *sc) 1345 { 1346 int ptr = sc->buf_area; /* memory pool */ 1347 int n, r; 1348 1349 /* 1350 * step 0: zero memory and figure out how many recv buffers and 1351 * frames we can have. 1352 */ 1353 ptr = (ptr + 3) & ~3; /* set alignment and stick with it */ 1354 1355 1356 /* 1357 * step 1: lay out data structures in the shared-memory area 1358 */ 1359 1360 /* The no-op commands; used if "nop-chaining" is in effect */ 1361 sc->nop_cmds = ptr; 1362 ptr += NTXBUF * IE_CMD_NOP_SZ; 1363 1364 /* The transmit commands */ 1365 sc->xmit_cmds = ptr; 1366 ptr += NTXBUF * IE_CMD_XMIT_SZ; 1367 1368 /* The transmit buffers descriptors */ 1369 sc->xbds = ptr; 1370 ptr += NTXBUF * IE_XBD_SZ; 1371 1372 /* The transmit buffers */ 1373 sc->xbufs = ptr; 1374 ptr += NTXBUF * IE_TBUF_SIZE; 1375 1376 ptr = (ptr + 3) & ~3; /* re-align.. just in case */ 1377 1378 /* Compute free space for RECV stuff */ 1379 n = sc->buf_area_sz - (ptr - sc->buf_area); 1380 1381 /* Compute size of one RECV frame */ 1382 r = IE_RFRAME_SZ + ((IE_RBD_SZ + IE_RBUF_SIZE) * B_PER_F); 1383 1384 sc->nframes = n / r; 1385 1386 if (sc->nframes <= 0) 1387 panic("ie: bogus buffer calc"); 1388 1389 sc->nrxbuf = sc->nframes * B_PER_F; 1390 1391 /* The receive frame descriptors */ 1392 sc->rframes = ptr; 1393 ptr += sc->nframes * IE_RFRAME_SZ; 1394 1395 /* The receive buffer descriptors */ 1396 sc->rbds = ptr; 1397 ptr += sc->nrxbuf * IE_RBD_SZ; 1398 1399 /* The receive buffers */ 1400 sc->rbufs = ptr; 1401 ptr += sc->nrxbuf * IE_RBUF_SIZE; 1402 1403 #if I82586_DEBUG 1404 printf("%s: %d frames %d bufs\n", device_xname(sc->sc_dev), sc->nframes, 1405 sc->nrxbuf); 1406 #endif 1407 1408 /* 1409 * step 2: link together the recv frames and set EOL on last one 1410 */ 1411 for (n = 0; n < sc->nframes; n++) { 1412 int m = (n == sc->nframes - 1) ? 0 : n + 1; 1413 1414 /* Clear status */ 1415 sc->ie_bus_write16(sc, IE_RFRAME_STATUS(sc->rframes,n), 0); 1416 1417 /* RBD link = NULL */ 1418 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,n), 1419 0xffff); 1420 1421 /* Make a circular list */ 1422 sc->ie_bus_write16(sc, IE_RFRAME_NEXT(sc->rframes,n), 1423 IE_RFRAME_ADDR(sc->rframes,m)); 1424 1425 /* Mark last as EOL */ 1426 sc->ie_bus_write16(sc, IE_RFRAME_LAST(sc->rframes,n), 1427 ((m==0)? (IE_FD_EOL|IE_FD_SUSP) : 0)); 1428 } 1429 1430 /* 1431 * step 3: link the RBDs and set EOL on last one 1432 */ 1433 for (n = 0; n < sc->nrxbuf; n++) { 1434 int m = (n == sc->nrxbuf - 1) ? 0 : n + 1; 1435 1436 /* Clear status */ 1437 sc->ie_bus_write16(sc, IE_RBD_STATUS(sc->rbds,n), 0); 1438 1439 /* Make a circular list */ 1440 sc->ie_bus_write16(sc, IE_RBD_NEXT(sc->rbds,n), 1441 IE_RBD_ADDR(sc->rbds,m)); 1442 1443 /* Link to data buffers */ 1444 sc->ie_bus_write24(sc, IE_RBD_BUFADDR(sc->rbds, n), 1445 IE_RBUF_ADDR(sc, n)); 1446 sc->ie_bus_write16(sc, IE_RBD_BUFLEN(sc->rbds,n), 1447 IE_RBUF_SIZE | ((m==0)?IE_RBD_EOL:0)); 1448 } 1449 1450 /* 1451 * step 4: all xmit no-op commands loopback onto themselves 1452 */ 1453 for (n = 0; n < NTXBUF; n++) { 1454 sc->ie_bus_write16(sc, IE_CMD_NOP_STATUS(sc->nop_cmds, n), 0); 1455 1456 sc->ie_bus_write16(sc, IE_CMD_NOP_CMD(sc->nop_cmds, n), 1457 IE_CMD_NOP); 1458 1459 sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n), 1460 IE_CMD_NOP_ADDR(sc->nop_cmds, n)); 1461 } 1462 1463 1464 /* 1465 * step 6: set the head and tail pointers on receive to keep track of 1466 * the order in which RFDs and RBDs are used. 1467 */ 1468 1469 /* Pointers to last packet sent and next available transmit buffer. */ 1470 sc->xchead = sc->xctail = 0; 1471 1472 /* Clear transmit-busy flag and set number of free transmit buffers. */ 1473 sc->xmit_busy = 0; 1474 1475 /* 1476 * Pointers to first and last receive frame. 1477 * The RFD pointed to by rftail is the only one that has EOL set. 1478 */ 1479 sc->rfhead = 0; 1480 sc->rftail = sc->nframes - 1; 1481 1482 /* 1483 * Pointers to first and last receive descriptor buffer. 1484 * The RBD pointed to by rbtail is the only one that has EOL set. 1485 */ 1486 sc->rbhead = 0; 1487 sc->rbtail = sc->nrxbuf - 1; 1488 1489 /* link in recv frames * and buffer into the scb. */ 1490 #if I82586_DEBUG 1491 printf("%s: reserved %d bytes\n", 1492 device_xname(sc->sc_dev), ptr - sc->buf_area); 1493 #endif 1494 } 1495 1496 static int 1497 ie_cfg_setup(struct ie_softc *sc, int cmd, int promiscuous, int manchester) 1498 { 1499 int cmdresult, status; 1500 u_int8_t buf[IE_CMD_CFG_SZ]; /* XXX malloc? */ 1501 1502 *IE_CMD_CFG_CNT(buf) = 0x0c; 1503 *IE_CMD_CFG_FIFO(buf) = 8; 1504 *IE_CMD_CFG_SAVEBAD(buf) = 0x40; 1505 *IE_CMD_CFG_ADDRLEN(buf) = 0x2e; 1506 *IE_CMD_CFG_PRIORITY(buf) = 0; 1507 *IE_CMD_CFG_IFS(buf) = 0x60; 1508 *IE_CMD_CFG_SLOT_LOW(buf) = 0; 1509 *IE_CMD_CFG_SLOT_HIGH(buf) = 0xf2; 1510 *IE_CMD_CFG_PROMISC(buf) = (!!promiscuous) | manchester << 2; 1511 *IE_CMD_CFG_CRSCDT(buf) = 0; 1512 *IE_CMD_CFG_MINLEN(buf) = 64; 1513 *IE_CMD_CFG_JUNK(buf) = 0xff; 1514 sc->memcopyout(sc, buf, cmd, IE_CMD_CFG_SZ); 1515 setup_simple_command(sc, IE_CMD_CONFIG, cmd); 1516 IE_BUS_BARRIER(sc, cmd, IE_CMD_CFG_SZ, BUS_SPACE_BARRIER_WRITE); 1517 1518 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmd, IE_STAT_COMPL, 0); 1519 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmd)); 1520 if (cmdresult != 0) { 1521 aprint_error_dev(sc->sc_dev, "configure command timed out; status %x\n", status); 1522 return (0); 1523 } 1524 if ((status & IE_STAT_OK) == 0) { 1525 aprint_error_dev(sc->sc_dev, "configure command failed; status %x\n", status); 1526 return (0); 1527 } 1528 1529 /* Squash any pending interrupts */ 1530 ie_ack(sc, IE_ST_WHENCE); 1531 return (1); 1532 } 1533 1534 static int 1535 ie_ia_setup(struct ie_softc *sc, int cmdbuf) 1536 { 1537 int cmdresult, status; 1538 struct ifnet *ifp = &sc->sc_ethercom.ec_if; 1539 1540 setup_simple_command(sc, IE_CMD_IASETUP, cmdbuf); 1541 1542 (sc->memcopyout)(sc, CLLADDR(ifp->if_sadl), 1543 IE_CMD_IAS_EADDR(cmdbuf), ETHER_ADDR_LEN); 1544 1545 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1546 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1547 if (cmdresult != 0) { 1548 aprint_error_dev(sc->sc_dev, "individual address command timed out; status %x\n", status); 1549 return (0); 1550 } 1551 if ((status & IE_STAT_OK) == 0) { 1552 aprint_error_dev(sc->sc_dev, "individual address command failed; status %x\n", status); 1553 return (0); 1554 } 1555 1556 /* Squash any pending interrupts */ 1557 ie_ack(sc, IE_ST_WHENCE); 1558 return (1); 1559 } 1560 1561 /* 1562 * Run the multicast setup command. 1563 * Called at splnet(). 1564 */ 1565 static int 1566 ie_mc_setup(struct ie_softc *sc, int cmdbuf) 1567 { 1568 int cmdresult, status; 1569 1570 if (sc->mcast_count == 0) 1571 return (1); 1572 1573 setup_simple_command(sc, IE_CMD_MCAST, cmdbuf); 1574 1575 (sc->memcopyout)(sc, (void *)sc->mcast_addrs, 1576 IE_CMD_MCAST_MADDR(cmdbuf), 1577 sc->mcast_count * ETHER_ADDR_LEN); 1578 1579 sc->ie_bus_write16(sc, IE_CMD_MCAST_BYTES(cmdbuf), 1580 sc->mcast_count * ETHER_ADDR_LEN); 1581 1582 /* Start the command */ 1583 cmdresult = i82586_start_cmd(sc, IE_CUC_START, cmdbuf, IE_STAT_COMPL, 0); 1584 status = sc->ie_bus_read16(sc, IE_CMD_COMMON_STATUS(cmdbuf)); 1585 if (cmdresult != 0) { 1586 aprint_error_dev(sc->sc_dev, "multicast setup command timed out; status %x\n", status); 1587 return (0); 1588 } 1589 if ((status & IE_STAT_OK) == 0) { 1590 aprint_error_dev(sc->sc_dev, "multicast setup command failed; status %x\n", 1591 status); 1592 return (0); 1593 } 1594 1595 /* Squash any pending interrupts */ 1596 ie_ack(sc, IE_ST_WHENCE); 1597 return (1); 1598 } 1599 1600 /* 1601 * This routine takes the environment generated by check_ie_present() and adds 1602 * to it all the other structures we need to operate the adapter. This 1603 * includes executing the CONFIGURE, IA-SETUP, and MC-SETUP commands, starting 1604 * the receiver unit, and clearing interrupts. 1605 * 1606 * THIS ROUTINE MUST BE CALLED AT splnet() OR HIGHER. 1607 */ 1608 int 1609 i82586_init(struct ifnet *ifp) 1610 { 1611 struct ie_softc *sc = ifp->if_softc; 1612 int cmd; 1613 1614 sc->async_cmd_inprogress = 0; 1615 1616 cmd = sc->buf_area; 1617 1618 /* 1619 * Send the configure command first. 1620 */ 1621 if (ie_cfg_setup(sc, cmd, sc->promisc, 0) == 0) 1622 return EIO; 1623 1624 /* 1625 * Send the Individual Address Setup command. 1626 */ 1627 if (ie_ia_setup(sc, cmd) == 0) 1628 return EIO; 1629 1630 /* 1631 * Run the time-domain reflectometer. 1632 */ 1633 ie_run_tdr(sc, cmd); 1634 1635 /* 1636 * Set the multi-cast filter, if any 1637 */ 1638 if (ie_mc_setup(sc, cmd) == 0) 1639 return EIO; 1640 1641 /* 1642 * Acknowledge any interrupts we have generated thus far. 1643 */ 1644 ie_ack(sc, IE_ST_WHENCE); 1645 1646 /* 1647 * Set up the transmit and recv buffers. 1648 */ 1649 i82586_setup_bufs(sc); 1650 1651 if (sc->hwinit) 1652 (sc->hwinit)(sc); 1653 1654 ifp->if_flags |= IFF_RUNNING; 1655 ifp->if_flags &= ~IFF_OACTIVE; 1656 1657 if (NTXBUF < 2) 1658 sc->do_xmitnopchain = 0; 1659 1660 i82586_start_transceiver(sc); 1661 return (0); 1662 } 1663 1664 /* 1665 * Start the RU and possibly the CU unit 1666 */ 1667 static void 1668 i82586_start_transceiver(struct ie_softc *sc) 1669 { 1670 1671 /* 1672 * Start RU at current position in frame & RBD lists. 1673 */ 1674 sc->ie_bus_write16(sc, IE_RFRAME_BUFDESC(sc->rframes,sc->rfhead), 1675 IE_RBD_ADDR(sc->rbds, sc->rbhead)); 1676 1677 sc->ie_bus_write16(sc, IE_SCB_RCVLST(sc->scb), 1678 IE_RFRAME_ADDR(sc->rframes,sc->rfhead)); 1679 1680 if (sc->do_xmitnopchain) { 1681 /* Stop transmit command chain */ 1682 if (i82586_start_cmd(sc, IE_CUC_SUSPEND|IE_RUC_SUSPEND, 0, 0, 0)) 1683 aprint_error_dev(sc->sc_dev, "CU/RU stop command timed out\n"); 1684 1685 /* Start the receiver & transmitter chain */ 1686 /* sc->scb->ie_command_list = 1687 IEADDR(sc->nop_cmds[(sc->xctail+NTXBUF-1) % NTXBUF]);*/ 1688 sc->ie_bus_write16(sc, IE_SCB_CMDLST(sc->scb), 1689 IE_CMD_NOP_ADDR( 1690 sc->nop_cmds, 1691 (sc->xctail + NTXBUF - 1) % NTXBUF)); 1692 1693 if (i82586_start_cmd(sc, IE_CUC_START|IE_RUC_START, 0, 0, 0)) 1694 aprint_error_dev(sc->sc_dev, "CU/RU command timed out\n"); 1695 } else { 1696 if (i82586_start_cmd(sc, IE_RUC_START, 0, 0, 0)) 1697 aprint_error_dev(sc->sc_dev, "RU command timed out\n"); 1698 } 1699 } 1700 1701 void 1702 i82586_stop( 1703 struct ifnet *ifp, 1704 int disable) 1705 { 1706 struct ie_softc *sc = ifp->if_softc; 1707 1708 if (i82586_start_cmd(sc, IE_RUC_SUSPEND | IE_CUC_SUSPEND, 0, 0, 0)) 1709 aprint_error_dev(sc->sc_dev, "iestop: disable commands timed out\n"); 1710 } 1711 1712 int 1713 i82586_ioctl(struct ifnet *ifp, unsigned long cmd, void *data) 1714 { 1715 struct ie_softc *sc = ifp->if_softc; 1716 struct ifreq *ifr = (struct ifreq *)data; 1717 int s, error = 0; 1718 1719 s = splnet(); 1720 switch(cmd) { 1721 case SIOCGIFMEDIA: 1722 case SIOCSIFMEDIA: 1723 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1724 break; 1725 default: 1726 error = ether_ioctl(ifp, cmd, data); 1727 if (error == ENETRESET) { 1728 /* 1729 * Multicast list has changed; set the hardware filter 1730 * accordingly. 1731 */ 1732 if (ifp->if_flags & IFF_RUNNING) 1733 ie_mc_reset(sc); 1734 error = 0; 1735 } 1736 break; 1737 } 1738 #if I82586_DEBUG 1739 if (cmd == SIOCSIFFLAGS) 1740 sc->sc_debug = (ifp->if_flags & IFF_DEBUG) ? IED_ALL : 0; 1741 #endif 1742 splx(s); 1743 return (error); 1744 } 1745 1746 static void 1747 ie_mc_reset(struct ie_softc *sc) 1748 { 1749 struct ether_multi *enm; 1750 struct ether_multistep step; 1751 int size; 1752 1753 /* 1754 * Step through the list of addresses. 1755 */ 1756 again: 1757 size = 0; 1758 sc->mcast_count = 0; 1759 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 1760 while (enm) { 1761 size += 6; 1762 if (sc->mcast_count >= IE_MAXMCAST || 1763 memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) != 0) { 1764 sc->sc_ethercom.ec_if.if_flags |= IFF_ALLMULTI; 1765 i82586_ioctl(&sc->sc_ethercom.ec_if, 1766 SIOCSIFFLAGS, NULL); 1767 return; 1768 } 1769 ETHER_NEXT_MULTI(step, enm); 1770 } 1771 1772 if (size > sc->mcast_addrs_size) { 1773 /* Need to allocate more space */ 1774 if (sc->mcast_addrs_size) 1775 free(sc->mcast_addrs, M_IFMADDR); 1776 sc->mcast_addrs = (char *) 1777 malloc(size, M_IFMADDR, M_WAITOK); 1778 sc->mcast_addrs_size = size; 1779 } 1780 1781 /* 1782 * We've got the space; now copy the addresses 1783 */ 1784 ETHER_FIRST_MULTI(step, &sc->sc_ethercom, enm); 1785 while (enm) { 1786 if (sc->mcast_count >= IE_MAXMCAST) 1787 goto again; /* Just in case */ 1788 1789 memcpy(&sc->mcast_addrs[sc->mcast_count], enm->enm_addrlo, 6); 1790 sc->mcast_count++; 1791 ETHER_NEXT_MULTI(step, enm); 1792 } 1793 sc->want_mcsetup = 1; 1794 } 1795 1796 /* 1797 * Media change callback. 1798 */ 1799 int 1800 i82586_mediachange(struct ifnet *ifp) 1801 { 1802 struct ie_softc *sc = ifp->if_softc; 1803 1804 if (sc->sc_mediachange) 1805 return ((*sc->sc_mediachange)(sc)); 1806 return (0); 1807 } 1808 1809 /* 1810 * Media status callback. 1811 */ 1812 void 1813 i82586_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) 1814 { 1815 struct ie_softc *sc = ifp->if_softc; 1816 1817 if (sc->sc_mediastatus) 1818 (*sc->sc_mediastatus)(sc, ifmr); 1819 } 1820 1821 #if I82586_DEBUG 1822 void 1823 print_rbd(struct ie_softc *sc, int n) 1824 { 1825 1826 printf("RBD at %08x:\n status %04x, next %04x, buffer %lx\n" 1827 "length/EOL %04x\n", IE_RBD_ADDR(sc->rbds,n), 1828 sc->ie_bus_read16(sc, IE_RBD_STATUS(sc->rbds,n)), 1829 sc->ie_bus_read16(sc, IE_RBD_NEXT(sc->rbds,n)), 1830 (u_long)0,/*bus_space_read_4(sc->bt, sc->bh, IE_RBD_BUFADDR(sc->rbds,n)),-* XXX */ 1831 sc->ie_bus_read16(sc, IE_RBD_BUFLEN(sc->rbds,n))); 1832 } 1833 #endif 1834
Indexes created Sun Sep 28 16:09:52 GMT 2025