Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/vx/if_vx.c
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1 /*- 2 * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Herb Peyerl. 16 * 4. The name of Herb Peyerl may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * Created from if_ep.c driver by Fred Gray (fgray@rice.edu) to support 38 * the 3c590 family. 39 */ 40 41 /* 42 * Modified from the FreeBSD 1.1.5.1 version by: 43 * Andres Vega Garcia 44 * INRIA - Sophia Antipolis, France 45 * avega@sophia.inria.fr 46 */ 47 48 /* 49 * Promiscuous mode added and interrupt logic slightly changed 50 * to reduce the number of adapter failures. Transceiver select 51 * logic changed to use value from EEPROM. Autoconfiguration 52 * features added. 53 * Done by: 54 * Serge Babkin 55 * Chelindbank (Chelyabinsk, Russia) 56 * babkin@hq.icb.chel.su 57 */ 58 59 60 #include <sys/param.h> 61 #include <sys/systm.h> 62 #include <sys/sockio.h> 63 #include <sys/kernel.h> 64 #include <sys/malloc.h> 65 #include <sys/mbuf.h> 66 #include <sys/socket.h> 67 68 #include <net/if.h> 69 70 #include <net/ethernet.h> 71 #include <net/if_dl.h> 72 #include <net/if_types.h> 73 74 #include <machine/bus.h> 75 76 #include <sys/bus.h> 77 78 #include <net/bpf.h> 79 80 #include <dev/vx/if_vxreg.h> 81 #include <dev/vx/if_vxvar.h> 82 83 #define ETHER_MAX_LEN 1518 84 #define ETHER_ADDR_LEN 6 85 #define ETHER_ALIGN 2 86 87 static struct connector_entry { 88 int bit; 89 char *name; 90 } conn_tab[VX_CONNECTORS] = { 91 92 #define CONNECTOR_UTP 0 93 { 94 0x08, "utp" 95 }, 96 #define CONNECTOR_AUI 1 97 { 98 0x20, "aui" 99 }, 100 /* dummy */ 101 { 102 0, "???" 103 }, 104 #define CONNECTOR_BNC 3 105 { 106 0x10, "bnc" 107 }, 108 #define CONNECTOR_TX 4 109 { 110 0x02, "tx" 111 }, 112 #define CONNECTOR_FX 5 113 { 114 0x04, "fx" 115 }, 116 #define CONNECTOR_MII 6 117 { 118 0x40, "mii" 119 }, 120 { 121 0, "???" 122 } 123 }; 124 125 static void vx_txstat(struct vx_softc *); 126 static int vx_status(struct vx_softc *); 127 static void vx_init(void *); 128 static void vx_init_locked(struct vx_softc *); 129 static int vx_ioctl(struct ifnet *, u_long, caddr_t); 130 static void vx_start(struct ifnet *); 131 static void vx_start_locked(struct ifnet *); 132 static void vx_watchdog(void *); 133 static void vx_reset(struct vx_softc *); 134 static void vx_read(struct vx_softc *); 135 static struct mbuf *vx_get(struct vx_softc *, u_int); 136 static void vx_mbuf_fill(void *); 137 static void vx_mbuf_empty(struct vx_softc *); 138 static void vx_setfilter(struct vx_softc *); 139 static void vx_getlink(struct vx_softc *); 140 static void vx_setlink(struct vx_softc *); 141 142 int 143 vx_attach(device_t dev) 144 { 145 struct vx_softc *sc = device_get_softc(dev); 146 struct ifnet *ifp; 147 int i; 148 u_char eaddr[6]; 149 150 ifp = sc->vx_ifp = if_alloc(IFT_ETHER); 151 if (ifp == NULL) { 152 device_printf(dev, "can not if_alloc()\n"); 153 return 0; 154 } 155 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 156 157 mtx_init(&sc->vx_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 158 MTX_DEF); 159 callout_init_mtx(&sc->vx_callout, &sc->vx_mtx, 0); 160 callout_init_mtx(&sc->vx_watchdog, &sc->vx_mtx, 0); 161 GO_WINDOW(0); 162 CSR_WRITE_2(sc, VX_COMMAND, GLOBAL_RESET); 163 VX_BUSY_WAIT; 164 165 vx_getlink(sc); 166 167 /* 168 * Read the station address from the eeprom 169 */ 170 GO_WINDOW(0); 171 for (i = 0; i < 3; i++) { 172 int x; 173 174 if (vx_busy_eeprom(sc)) { 175 mtx_destroy(&sc->vx_mtx); 176 if_free(ifp); 177 return 0; 178 } 179 CSR_WRITE_2(sc, VX_W0_EEPROM_COMMAND, EEPROM_CMD_RD 180 | (EEPROM_OEM_ADDR0 + i)); 181 if (vx_busy_eeprom(sc)) { 182 mtx_destroy(&sc->vx_mtx); 183 if_free(ifp); 184 return 0; 185 } 186 x = CSR_READ_2(sc, VX_W0_EEPROM_DATA); 187 eaddr[(i << 1)] = x >> 8; 188 eaddr[(i << 1) + 1] = x; 189 } 190 191 ifp->if_snd.ifq_maxlen = ifqmaxlen; 192 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 193 ifp->if_start = vx_start; 194 ifp->if_ioctl = vx_ioctl; 195 ifp->if_init = vx_init; 196 ifp->if_softc = sc; 197 198 ether_ifattach(ifp, eaddr); 199 200 sc->vx_tx_start_thresh = 20; /* probably a good starting point. */ 201 202 VX_LOCK(sc); 203 vx_stop(sc); 204 VX_UNLOCK(sc); 205 206 return 1; 207 } 208 209 /* 210 * The order in here seems important. Otherwise we may not receive 211 * interrupts. ?! 212 */ 213 static void 214 vx_init(void *xsc) 215 { 216 struct vx_softc *sc = (struct vx_softc *)xsc; 217 218 VX_LOCK(sc); 219 vx_init_locked(sc); 220 VX_UNLOCK(sc); 221 } 222 223 static void 224 vx_init_locked(struct vx_softc *sc) 225 { 226 struct ifnet *ifp = sc->vx_ifp; 227 int i; 228 229 VX_LOCK_ASSERT(sc); 230 231 VX_BUSY_WAIT; 232 233 GO_WINDOW(2); 234 235 for (i = 0; i < 6; i++) /* Reload the ether_addr. */ 236 CSR_WRITE_1(sc, VX_W2_ADDR_0 + i, IF_LLADDR(sc->vx_ifp)[i]); 237 238 CSR_WRITE_2(sc, VX_COMMAND, RX_RESET); 239 VX_BUSY_WAIT; 240 CSR_WRITE_2(sc, VX_COMMAND, TX_RESET); 241 VX_BUSY_WAIT; 242 243 GO_WINDOW(1); /* Window 1 is operating window */ 244 for (i = 0; i < 31; i++) 245 CSR_READ_1(sc, VX_W1_TX_STATUS); 246 247 CSR_WRITE_2(sc, VX_COMMAND, SET_RD_0_MASK | S_CARD_FAILURE | 248 S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); 249 CSR_WRITE_2(sc, VX_COMMAND, SET_INTR_MASK | S_CARD_FAILURE | 250 S_RX_COMPLETE | S_TX_COMPLETE | S_TX_AVAIL); 251 252 /* 253 * Attempt to get rid of any stray interrupts that occured during 254 * configuration. On the i386 this isn't possible because one may 255 * already be queued. However, a single stray interrupt is 256 * unimportant. 257 */ 258 CSR_WRITE_2(sc, VX_COMMAND, ACK_INTR | 0xff); 259 260 vx_setfilter(sc); 261 vx_setlink(sc); 262 263 CSR_WRITE_2(sc, VX_COMMAND, RX_ENABLE); 264 CSR_WRITE_2(sc, VX_COMMAND, TX_ENABLE); 265 266 vx_mbuf_fill(sc); 267 268 /* Interface is now `running', with no output active. */ 269 ifp->if_drv_flags |= IFF_DRV_RUNNING; 270 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 271 callout_reset(&sc->vx_watchdog, hz, vx_watchdog, sc); 272 273 /* Attempt to start output, if any. */ 274 vx_start_locked(ifp); 275 } 276 277 static void 278 vx_setfilter(struct vx_softc *sc) 279 { 280 struct ifnet *ifp = sc->vx_ifp; 281 282 VX_LOCK_ASSERT(sc); 283 GO_WINDOW(1); /* Window 1 is operating window */ 284 CSR_WRITE_2(sc, VX_COMMAND, SET_RX_FILTER | 285 FIL_INDIVIDUAL | FIL_BRDCST | FIL_MULTICAST | 286 ((ifp->if_flags & IFF_PROMISC) ? FIL_PROMISC : 0)); 287 } 288 289 static void 290 vx_getlink(struct vx_softc *sc) 291 { 292 int n, k; 293 294 GO_WINDOW(3); 295 sc->vx_connectors = CSR_READ_2(sc, VX_W3_RESET_OPT) & 0x7f; 296 for (n = 0, k = 0; k < VX_CONNECTORS; k++) { 297 if (sc->vx_connectors & conn_tab[k].bit) { 298 if (n > 0) 299 printf("/"); 300 printf("%s", conn_tab[k].name); 301 n++; 302 } 303 } 304 if (sc->vx_connectors == 0) { 305 printf("no connectors!\n"); 306 return; 307 } 308 GO_WINDOW(3); 309 sc->vx_connector = 310 (CSR_READ_4(sc, VX_W3_INTERNAL_CFG) & INTERNAL_CONNECTOR_MASK) 311 >> INTERNAL_CONNECTOR_BITS; 312 if (sc->vx_connector & 0x10) { 313 sc->vx_connector &= 0x0f; 314 printf("[*%s*]", conn_tab[(int)sc->vx_connector].name); 315 printf(": disable 'auto select' with DOS util!\n"); 316 } else { 317 printf("[*%s*]\n", conn_tab[(int)sc->vx_connector].name); 318 } 319 } 320 321 static void 322 vx_setlink(struct vx_softc *sc) 323 { 324 struct ifnet *ifp = sc->vx_ifp; 325 int i, j, k; 326 char *reason, *warning; 327 static int prev_flags; 328 static signed char prev_conn = -1; 329 330 VX_LOCK_ASSERT(sc); 331 if (prev_conn == -1) 332 prev_conn = sc->vx_connector; 333 334 /* 335 * S.B. 336 * 337 * Now behavior was slightly changed: 338 * 339 * if any of flags link[0-2] is used and its connector is 340 * physically present the following connectors are used: 341 * 342 * link0 - AUI * highest precedence 343 * link1 - BNC 344 * link2 - UTP * lowest precedence 345 * 346 * If none of them is specified then 347 * connector specified in the EEPROM is used 348 * (if present on card or UTP if not). 349 */ 350 i = sc->vx_connector; /* default in EEPROM */ 351 reason = "default"; 352 warning = 0; 353 354 if (ifp->if_flags & IFF_LINK0) { 355 if (sc->vx_connectors & conn_tab[CONNECTOR_AUI].bit) { 356 i = CONNECTOR_AUI; 357 reason = "link0"; 358 } else { 359 warning = "aui not present! (link0)"; 360 } 361 } else if (ifp->if_flags & IFF_LINK1) { 362 if (sc->vx_connectors & conn_tab[CONNECTOR_BNC].bit) { 363 i = CONNECTOR_BNC; 364 reason = "link1"; 365 } else { 366 warning = "bnc not present! (link1)"; 367 } 368 } else if (ifp->if_flags & IFF_LINK2) { 369 if (sc->vx_connectors & conn_tab[CONNECTOR_UTP].bit) { 370 i = CONNECTOR_UTP; 371 reason = "link2"; 372 } else { 373 warning = "utp not present! (link2)"; 374 } 375 } else if ((sc->vx_connectors & conn_tab[(int)sc->vx_connector].bit) == 0) { 376 warning = "strange connector type in EEPROM."; 377 reason = "forced"; 378 i = CONNECTOR_UTP; 379 } 380 /* Avoid unnecessary message. */ 381 k = (prev_flags ^ ifp->if_flags) & (IFF_LINK0 | IFF_LINK1 | IFF_LINK2); 382 if ((k != 0) || (prev_conn != i)) { 383 if (warning != NULL) 384 if_printf(ifp, "warning: %s\n", warning); 385 if_printf(ifp, "selected %s. (%s)\n", conn_tab[i].name, reason); 386 } 387 /* Set the selected connector. */ 388 GO_WINDOW(3); 389 j = CSR_READ_4(sc, VX_W3_INTERNAL_CFG) & ~INTERNAL_CONNECTOR_MASK; 390 CSR_WRITE_4(sc, VX_W3_INTERNAL_CFG, j | (i << INTERNAL_CONNECTOR_BITS)); 391 392 /* First, disable all. */ 393 CSR_WRITE_2(sc, VX_COMMAND, STOP_TRANSCEIVER); 394 DELAY(800); 395 GO_WINDOW(4); 396 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, 0); 397 398 /* Second, enable the selected one. */ 399 switch (i) { 400 case CONNECTOR_UTP: 401 GO_WINDOW(4); 402 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, ENABLE_UTP); 403 break; 404 case CONNECTOR_BNC: 405 CSR_WRITE_2(sc, VX_COMMAND, START_TRANSCEIVER); 406 DELAY(800); 407 break; 408 case CONNECTOR_TX: 409 case CONNECTOR_FX: 410 GO_WINDOW(4); 411 CSR_WRITE_2(sc, VX_W4_MEDIA_TYPE, LINKBEAT_ENABLE); 412 break; 413 default: /* AUI and MII fall here */ 414 break; 415 } 416 GO_WINDOW(1); 417 418 prev_flags = ifp->if_flags; 419 prev_conn = i; 420 } 421 422 static void 423 vx_start(struct ifnet *ifp) 424 { 425 struct vx_softc *sc = ifp->if_softc; 426 427 VX_LOCK(sc); 428 vx_start_locked(ifp); 429 VX_UNLOCK(sc); 430 } 431 432 static void 433 vx_start_locked(struct ifnet *ifp) 434 { 435 struct vx_softc *sc = ifp->if_softc; 436 struct mbuf *m; 437 int len, pad; 438 439 VX_LOCK_ASSERT(sc); 440 441 /* Don't transmit if interface is busy or not running */ 442 if ((sc->vx_ifp->if_drv_flags & 443 (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != IFF_DRV_RUNNING) 444 return; 445 446 startagain: 447 /* Sneak a peek at the next packet */ 448 m = ifp->if_snd.ifq_head; 449 if (m == NULL) { 450 return; 451 } 452 /* We need to use m->m_pkthdr.len, so require the header */ 453 M_ASSERTPKTHDR(m); 454 len = m->m_pkthdr.len; 455 456 pad = (4 - len) & 3; 457 458 /* 459 * The 3c509 automatically pads short packets to minimum ethernet 460 * length, but we drop packets that are too large. Perhaps we should 461 * truncate them instead? 462 */ 463 if (len + pad > ETHER_MAX_LEN) { 464 /* packet is obviously too large: toss it */ 465 ++ifp->if_oerrors; 466 IF_DEQUEUE(&ifp->if_snd, m); 467 m_freem(m); 468 goto readcheck; 469 } 470 VX_BUSY_WAIT; 471 if (CSR_READ_2(sc, VX_W1_FREE_TX) < len + pad + 4) { 472 CSR_WRITE_2(sc, VX_COMMAND, 473 SET_TX_AVAIL_THRESH | ((len + pad + 4) >> 2)); 474 /* not enough room in FIFO - make sure */ 475 if (CSR_READ_2(sc, VX_W1_FREE_TX) < len + pad + 4) { 476 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 477 sc->vx_timer = 1; 478 return; 479 } 480 } 481 CSR_WRITE_2(sc, VX_COMMAND, SET_TX_AVAIL_THRESH | (8188 >> 2)); 482 IF_DEQUEUE(&ifp->if_snd, m); 483 if (m == NULL) /* not really needed */ 484 return; 485 486 VX_BUSY_WAIT; 487 CSR_WRITE_2(sc, VX_COMMAND, SET_TX_START_THRESH | 488 ((len / 4 + sc->vx_tx_start_thresh) >> 2)); 489 490 BPF_MTAP(sc->vx_ifp, m); 491 492 /* 493 * Do the output at splhigh() so that an interrupt from another device 494 * won't cause a FIFO underrun. 495 * 496 * XXX: Can't enforce that anymore. 497 */ 498 499 CSR_WRITE_4(sc, VX_W1_TX_PIO_WR_1, len | TX_INDICATE); 500 501 while (m) { 502 if (m->m_len > 3) 503 bus_space_write_multi_4(sc->vx_bst, sc->vx_bsh, 504 VX_W1_TX_PIO_WR_1, (u_int32_t *)mtod(m, caddr_t), 505 m->m_len / 4); 506 if (m->m_len & 3) 507 bus_space_write_multi_1(sc->vx_bst, sc->vx_bsh, 508 VX_W1_TX_PIO_WR_1, 509 mtod(m, caddr_t) + (m->m_len & ~3), m->m_len & 3); 510 m = m_free(m); 511 } 512 while (pad--) 513 CSR_WRITE_1(sc, VX_W1_TX_PIO_WR_1, 0); /* Padding */ 514 515 ++ifp->if_opackets; 516 sc->vx_timer = 1; 517 518 readcheck: 519 if ((CSR_READ_2(sc, VX_W1_RX_STATUS) & ERR_INCOMPLETE) == 0) { 520 /* We received a complete packet. */ 521 522 if ((CSR_READ_2(sc, VX_STATUS) & S_INTR_LATCH) == 0) { 523 /* 524 * No interrupt, read the packet and continue 525 * Is this supposed to happen? Is my motherboard 526 * completely busted? 527 */ 528 vx_read(sc); 529 } else 530 /* 531 * Got an interrupt, return so that it gets 532 * serviced. 533 */ 534 return; 535 } else { 536 /* Check if we are stuck and reset [see XXX comment] */ 537 if (vx_status(sc)) { 538 if (ifp->if_flags & IFF_DEBUG) 539 if_printf(ifp, "adapter reset\n"); 540 vx_reset(sc); 541 } 542 } 543 544 goto startagain; 545 } 546 547 /* 548 * XXX: The 3c509 card can get in a mode where both the fifo status bit 549 * FIFOS_RX_OVERRUN and the status bit ERR_INCOMPLETE are set 550 * We detect this situation and we reset the adapter. 551 * It happens at times when there is a lot of broadcast traffic 552 * on the cable (once in a blue moon). 553 */ 554 static int 555 vx_status(struct vx_softc *sc) 556 { 557 struct ifnet *ifp; 558 int fifost; 559 560 VX_LOCK_ASSERT(sc); 561 562 /* 563 * Check the FIFO status and act accordingly 564 */ 565 GO_WINDOW(4); 566 fifost = CSR_READ_2(sc, VX_W4_FIFO_DIAG); 567 GO_WINDOW(1); 568 569 ifp = sc->vx_ifp; 570 if (fifost & FIFOS_RX_UNDERRUN) { 571 if (ifp->if_flags & IFF_DEBUG) 572 if_printf(ifp, "RX underrun\n"); 573 vx_reset(sc); 574 return 0; 575 } 576 if (fifost & FIFOS_RX_STATUS_OVERRUN) { 577 if (ifp->if_flags & IFF_DEBUG) 578 if_printf(ifp, "RX Status overrun\n"); 579 return 1; 580 } 581 if (fifost & FIFOS_RX_OVERRUN) { 582 if (ifp->if_flags & IFF_DEBUG) 583 if_printf(ifp, "RX overrun\n"); 584 return 1; 585 } 586 if (fifost & FIFOS_TX_OVERRUN) { 587 if (ifp->if_flags & IFF_DEBUG) 588 if_printf(ifp, "TX overrun\n"); 589 vx_reset(sc); 590 return 0; 591 } 592 return 0; 593 } 594 595 static void 596 vx_txstat(struct vx_softc *sc) 597 { 598 struct ifnet *ifp; 599 int i; 600 601 VX_LOCK_ASSERT(sc); 602 603 /* 604 * We need to read+write TX_STATUS until we get a 0 status 605 * in order to turn off the interrupt flag. 606 */ 607 ifp = sc->vx_ifp; 608 while ((i = CSR_READ_1(sc, VX_W1_TX_STATUS)) & TXS_COMPLETE) { 609 CSR_WRITE_1(sc, VX_W1_TX_STATUS, 0x0); 610 611 if (i & TXS_JABBER) { 612 ++ifp->if_oerrors; 613 if (ifp->if_flags & IFF_DEBUG) 614 if_printf(ifp, "jabber (%x)\n", i); 615 vx_reset(sc); 616 } else if (i & TXS_UNDERRUN) { 617 ++ifp->if_oerrors; 618 if (ifp->if_flags & IFF_DEBUG) 619 if_printf(ifp, "fifo underrun (%x) @%d\n", i, 620 sc->vx_tx_start_thresh); 621 if (sc->vx_tx_succ_ok < 100) 622 sc->vx_tx_start_thresh = 623 min(ETHER_MAX_LEN, 624 sc->vx_tx_start_thresh + 20); 625 sc->vx_tx_succ_ok = 0; 626 vx_reset(sc); 627 } else if (i & TXS_MAX_COLLISION) { 628 ++ifp->if_collisions; 629 CSR_WRITE_2(sc, VX_COMMAND, TX_ENABLE); 630 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 631 } else 632 sc->vx_tx_succ_ok = (sc->vx_tx_succ_ok + 1) & 127; 633 } 634 } 635 636 void 637 vx_intr(void *voidsc) 638 { 639 short status; 640 struct vx_softc *sc = voidsc; 641 struct ifnet *ifp = sc->vx_ifp; 642 643 VX_LOCK(sc); 644 for (;;) { 645 CSR_WRITE_2(sc, VX_COMMAND, C_INTR_LATCH); 646 647 status = CSR_READ_2(sc, VX_STATUS); 648 649 if ((status & (S_TX_COMPLETE | S_TX_AVAIL | 650 S_RX_COMPLETE | S_CARD_FAILURE)) == 0) 651 break; 652 653 /* 654 * Acknowledge any interrupts. It's important that we do this 655 * first, since there would otherwise be a race condition. 656 * Due to the i386 interrupt queueing, we may get spurious 657 * interrupts occasionally. 658 */ 659 CSR_WRITE_2(sc, VX_COMMAND, ACK_INTR | status); 660 661 if (status & S_RX_COMPLETE) 662 vx_read(sc); 663 if (status & S_TX_AVAIL) { 664 sc->vx_timer = 0; 665 sc->vx_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 666 vx_start_locked(sc->vx_ifp); 667 } 668 if (status & S_CARD_FAILURE) { 669 if_printf(ifp, "adapter failure (%x)\n", status); 670 sc->vx_timer = 0; 671 vx_reset(sc); 672 break; 673 } 674 if (status & S_TX_COMPLETE) { 675 sc->vx_timer = 0; 676 vx_txstat(sc); 677 vx_start_locked(ifp); 678 } 679 } 680 VX_UNLOCK(sc); 681 682 /* no more interrupts */ 683 return; 684 } 685 686 static void 687 vx_read(struct vx_softc *sc) 688 { 689 struct ifnet *ifp = sc->vx_ifp; 690 struct mbuf *m; 691 struct ether_header *eh; 692 u_int len; 693 694 VX_LOCK_ASSERT(sc); 695 len = CSR_READ_2(sc, VX_W1_RX_STATUS); 696 again: 697 698 if (ifp->if_flags & IFF_DEBUG) { 699 int err = len & ERR_MASK; 700 char *s = NULL; 701 702 if (len & ERR_INCOMPLETE) 703 s = "incomplete packet"; 704 else if (err == ERR_OVERRUN) 705 s = "packet overrun"; 706 else if (err == ERR_RUNT) 707 s = "runt packet"; 708 else if (err == ERR_ALIGNMENT) 709 s = "bad alignment"; 710 else if (err == ERR_CRC) 711 s = "bad crc"; 712 else if (err == ERR_OVERSIZE) 713 s = "oversized packet"; 714 else if (err == ERR_DRIBBLE) 715 s = "dribble bits"; 716 717 if (s) 718 if_printf(ifp, "%s\n", s); 719 } 720 if (len & ERR_INCOMPLETE) 721 return; 722 723 if (len & ERR_RX) { 724 ++ifp->if_ierrors; 725 goto abort; 726 } 727 len &= RX_BYTES_MASK; /* Lower 11 bits = RX bytes. */ 728 729 /* Pull packet off interface. */ 730 m = vx_get(sc, len); 731 if (m == 0) { 732 ifp->if_ierrors++; 733 goto abort; 734 } 735 ++ifp->if_ipackets; 736 737 { 738 struct mbuf *m0; 739 740 m0 = m_devget(mtod(m, char *), m->m_pkthdr.len, ETHER_ALIGN, 741 ifp, NULL); 742 if (m0 == NULL) { 743 ifp->if_ierrors++; 744 goto abort; 745 } 746 m_freem(m); 747 m = m0; 748 } 749 750 /* We assume the header fit entirely in one mbuf. */ 751 eh = mtod(m, struct ether_header *); 752 753 /* 754 * XXX: Some cards seem to be in promiscous mode all the time. 755 * we need to make sure we only get our own stuff always. 756 * bleah! 757 */ 758 759 if (!(ifp->if_flags & IFF_PROMISC) 760 && (eh->ether_dhost[0] & 1) == 0 /* !mcast and !bcast */ 761 && bcmp(eh->ether_dhost, IF_LLADDR(sc->vx_ifp), 762 ETHER_ADDR_LEN) != 0) { 763 m_freem(m); 764 return; 765 } 766 VX_UNLOCK(sc); 767 (*ifp->if_input)(ifp, m); 768 VX_LOCK(sc); 769 770 /* 771 * In periods of high traffic we can actually receive enough 772 * packets so that the fifo overrun bit will be set at this point, 773 * even though we just read a packet. In this case we 774 * are not going to receive any more interrupts. We check for 775 * this condition and read again until the fifo is not full. 776 * We could simplify this test by not using vx_status(), but 777 * rechecking the RX_STATUS register directly. This test could 778 * result in unnecessary looping in cases where there is a new 779 * packet but the fifo is not full, but it will not fix the 780 * stuck behavior. 781 * 782 * Even with this improvement, we still get packet overrun errors 783 * which are hurting performance. Maybe when I get some more time 784 * I'll modify vx_read() so that it can handle RX_EARLY interrupts. 785 */ 786 if (vx_status(sc)) { 787 len = CSR_READ_2(sc, VX_W1_RX_STATUS); 788 /* Check if we are stuck and reset [see XXX comment] */ 789 if (len & ERR_INCOMPLETE) { 790 if (ifp->if_flags & IFF_DEBUG) 791 if_printf(ifp, "adapter reset\n"); 792 vx_reset(sc); 793 return; 794 } 795 goto again; 796 } 797 return; 798 799 abort: 800 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 801 } 802 803 static struct mbuf * 804 vx_get(struct vx_softc *sc, u_int totlen) 805 { 806 struct ifnet *ifp = sc->vx_ifp; 807 struct mbuf *top, **mp, *m; 808 int len; 809 810 VX_LOCK_ASSERT(sc); 811 m = sc->vx_mb[sc->vx_next_mb]; 812 sc->vx_mb[sc->vx_next_mb] = NULL; 813 if (m == NULL) { 814 MGETHDR(m, M_NOWAIT, MT_DATA); 815 if (m == NULL) 816 return NULL; 817 } else { 818 /* If the queue is no longer full, refill. */ 819 if (sc->vx_last_mb == sc->vx_next_mb && 820 sc->vx_buffill_pending == 0) { 821 callout_reset(&sc->vx_callout, hz / 100, vx_mbuf_fill, 822 sc); 823 sc->vx_buffill_pending = 1; 824 } 825 /* Convert one of our saved mbuf's. */ 826 sc->vx_next_mb = (sc->vx_next_mb + 1) % MAX_MBS; 827 m->m_data = m->m_pktdat; 828 m->m_flags = M_PKTHDR; 829 bzero(&m->m_pkthdr, sizeof(m->m_pkthdr)); 830 } 831 m->m_pkthdr.rcvif = ifp; 832 m->m_pkthdr.len = totlen; 833 len = MHLEN; 834 top = NULL; 835 mp = ⊤ 836 837 /* 838 * We read the packet at splhigh() so that an interrupt from another 839 * device doesn't cause the card's buffer to overflow while we're 840 * reading it. We may still lose packets at other times. 841 * 842 * XXX: Can't enforce this anymore. 843 */ 844 845 /* 846 * Since we don't set allowLargePackets bit in MacControl register, 847 * we can assume that totlen <= 1500bytes. 848 * The while loop will be performed iff we have a packet with 849 * MLEN < m_len < MINCLSIZE. 850 */ 851 while (totlen > 0) { 852 if (top) { 853 m = sc->vx_mb[sc->vx_next_mb]; 854 sc->vx_mb[sc->vx_next_mb] = NULL; 855 if (m == NULL) { 856 MGET(m, M_NOWAIT, MT_DATA); 857 if (m == NULL) { 858 m_freem(top); 859 return NULL; 860 } 861 } else { 862 sc->vx_next_mb = (sc->vx_next_mb + 1) % MAX_MBS; 863 } 864 len = MLEN; 865 } 866 if (totlen >= MINCLSIZE) { 867 MCLGET(m, M_NOWAIT); 868 if (m->m_flags & M_EXT) 869 len = MCLBYTES; 870 } 871 len = min(totlen, len); 872 if (len > 3) 873 bus_space_read_multi_4(sc->vx_bst, sc->vx_bsh, 874 VX_W1_RX_PIO_RD_1, mtod(m, u_int32_t *), len / 4); 875 if (len & 3) { 876 bus_space_read_multi_1(sc->vx_bst, sc->vx_bsh, 877 VX_W1_RX_PIO_RD_1, mtod(m, u_int8_t *) + (len & ~3), 878 len & 3); 879 } 880 m->m_len = len; 881 totlen -= len; 882 *mp = m; 883 mp = &m->m_next; 884 } 885 886 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 887 888 return top; 889 } 890 891 892 static int 893 vx_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 894 { 895 struct vx_softc *sc = ifp->if_softc; 896 struct ifreq *ifr = (struct ifreq *) data; 897 int error = 0; 898 899 switch (cmd) { 900 case SIOCSIFFLAGS: 901 VX_LOCK(sc); 902 if ((ifp->if_flags & IFF_UP) == 0 && 903 (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) { 904 /* 905 * If interface is marked up and it is stopped, then 906 * start it. 907 */ 908 vx_stop(sc); 909 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 910 } else if ((ifp->if_flags & IFF_UP) != 0 && 911 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 912 /* 913 * If interface is marked up and it is stopped, then 914 * start it. 915 */ 916 vx_init_locked(sc); 917 } else { 918 /* 919 * deal with flags changes: 920 * IFF_MULTICAST, IFF_PROMISC, 921 * IFF_LINK0, IFF_LINK1, 922 */ 923 vx_setfilter(sc); 924 vx_setlink(sc); 925 } 926 VX_UNLOCK(sc); 927 break; 928 929 case SIOCSIFMTU: 930 /* 931 * Set the interface MTU. 932 */ 933 VX_LOCK(sc); 934 if (ifr->ifr_mtu > ETHERMTU) { 935 error = EINVAL; 936 } else { 937 ifp->if_mtu = ifr->ifr_mtu; 938 } 939 VX_UNLOCK(sc); 940 break; 941 942 case SIOCADDMULTI: 943 case SIOCDELMULTI: 944 /* 945 * Multicast list has changed; set the hardware filter 946 * accordingly. 947 */ 948 VX_LOCK(sc); 949 vx_reset(sc); 950 VX_UNLOCK(sc); 951 error = 0; 952 break; 953 954 955 default: 956 error = ether_ioctl(ifp, cmd, data); 957 break; 958 } 959 960 return (error); 961 } 962 963 static void 964 vx_reset(struct vx_softc *sc) 965 { 966 967 VX_LOCK_ASSERT(sc); 968 vx_stop(sc); 969 vx_init_locked(sc); 970 } 971 972 static void 973 vx_watchdog(void *arg) 974 { 975 struct vx_softc *sc; 976 struct ifnet *ifp; 977 978 sc = arg; 979 VX_LOCK_ASSERT(sc); 980 callout_reset(&sc->vx_watchdog, hz, vx_watchdog, sc); 981 if (sc->vx_timer == 0 || --sc->vx_timer > 0) 982 return; 983 984 ifp = sc->vx_ifp; 985 if (ifp->if_flags & IFF_DEBUG) 986 if_printf(ifp, "device timeout\n"); 987 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 988 vx_start_locked(ifp); 989 vx_intr(sc); 990 } 991 992 void 993 vx_stop(struct vx_softc *sc) 994 { 995 996 VX_LOCK_ASSERT(sc); 997 sc->vx_timer = 0; 998 callout_stop(&sc->vx_watchdog); 999 1000 CSR_WRITE_2(sc, VX_COMMAND, RX_DISABLE); 1001 CSR_WRITE_2(sc, VX_COMMAND, RX_DISCARD_TOP_PACK); 1002 VX_BUSY_WAIT; 1003 CSR_WRITE_2(sc, VX_COMMAND, TX_DISABLE); 1004 CSR_WRITE_2(sc, VX_COMMAND, STOP_TRANSCEIVER); 1005 DELAY(800); 1006 CSR_WRITE_2(sc, VX_COMMAND, RX_RESET); 1007 VX_BUSY_WAIT; 1008 CSR_WRITE_2(sc, VX_COMMAND, TX_RESET); 1009 VX_BUSY_WAIT; 1010 CSR_WRITE_2(sc, VX_COMMAND, C_INTR_LATCH); 1011 CSR_WRITE_2(sc, VX_COMMAND, SET_RD_0_MASK); 1012 CSR_WRITE_2(sc, VX_COMMAND, SET_INTR_MASK); 1013 CSR_WRITE_2(sc, VX_COMMAND, SET_RX_FILTER); 1014 1015 vx_mbuf_empty(sc); 1016 } 1017 1018 int 1019 vx_busy_eeprom(struct vx_softc *sc) 1020 { 1021 int j, i = 100; 1022 1023 while (i--) { 1024 j = CSR_READ_2(sc, VX_W0_EEPROM_COMMAND); 1025 if (j & EEPROM_BUSY) 1026 DELAY(100); 1027 else 1028 break; 1029 } 1030 if (!i) { 1031 if_printf(sc->vx_ifp, "eeprom failed to come ready\n"); 1032 return (1); 1033 } 1034 return (0); 1035 } 1036 1037 static void 1038 vx_mbuf_fill(void *sp) 1039 { 1040 struct vx_softc *sc = (struct vx_softc *)sp; 1041 int i; 1042 1043 VX_LOCK_ASSERT(sc); 1044 i = sc->vx_last_mb; 1045 do { 1046 if (sc->vx_mb[i] == NULL) 1047 MGET(sc->vx_mb[i], M_NOWAIT, MT_DATA); 1048 if (sc->vx_mb[i] == NULL) 1049 break; 1050 i = (i + 1) % MAX_MBS; 1051 } while (i != sc->vx_next_mb); 1052 sc->vx_last_mb = i; 1053 /* If the queue was not filled, try again. */ 1054 if (sc->vx_last_mb != sc->vx_next_mb) { 1055 callout_reset(&sc->vx_callout, hz / 100, vx_mbuf_fill, sc); 1056 sc->vx_buffill_pending = 1; 1057 } else { 1058 sc->vx_buffill_pending = 0; 1059 } 1060 } 1061 1062 static void 1063 vx_mbuf_empty(struct vx_softc *sc) 1064 { 1065 int i; 1066 1067 VX_LOCK_ASSERT(sc); 1068 for (i = 0; i < MAX_MBS; i++) { 1069 if (sc->vx_mb[i]) { 1070 m_freem(sc->vx_mb[i]); 1071 sc->vx_mb[i] = NULL; 1072 } 1073 } 1074 sc->vx_last_mb = sc->vx_next_mb = 0; 1075 if (sc->vx_buffill_pending != 0) 1076 callout_stop(&sc->vx_callout); 1077 }
Cache object: 40c63302cbc8bdd03ad9012020feb025
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