if_fxp.c revision 13638
1/* 2 * Copyright (c) 1995, David Greenman 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 unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by David Greenman. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: if_fxp.c,v 1.9 1996/01/23 21:47:03 se Exp $ 33 */ 34 35/* 36 * Intel EtherExpress Pro/100B PCI Fast Ethernet driver 37 */ 38 39#include "bpfilter.h" 40 41#include <sys/param.h> 42#include <sys/systm.h> 43#include <sys/ioctl.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47#include <sys/devconf.h> 48#include <sys/syslog.h> 49 50#include <net/if.h> 51#include <net/if_dl.h> 52#include <net/if_types.h> 53 54#ifdef INET 55#include <netinet/in.h> 56#include <netinet/in_systm.h> 57#include <netinet/in_var.h> 58#include <netinet/ip.h> 59#include <netinet/if_ether.h> 60#endif 61 62#ifdef IPX 63#include <netipx/ipx.h> 64#include <netipx/ipx_if.h> 65#endif 66 67#ifdef NS 68#include <netns/ns.h> 69#include <netns/ns_if.h> 70#endif 71 72#if NBPFILTER > 0 73#include <net/bpf.h> 74#include <net/bpfdesc.h> 75#endif 76 77#include <vm/vm.h> /* for vtophys */ 78#include <vm/vm_param.h> /* for vtophys */ 79#include <vm/pmap.h> /* for vtophys */ 80#include <machine/clock.h> /* for DELAY */ 81 82#include <pci/pcivar.h> 83#include <pci/if_fxpreg.h> 84 85struct fxp_softc { 86 struct arpcom arpcom; /* per-interface network data */ 87 caddr_t bpf; /* BPF token */ 88 struct fxp_csr *csr; /* control/status registers */ 89 struct fxp_cb_tx *cbl_base; /* base of TxCB list */ 90 struct fxp_cb_tx *cbl_first; /* first active TxCB in list */ 91 struct fxp_cb_tx *cbl_last; /* last active TxCB in list */ 92 struct mbuf *rfa_headm; /* first mbuf in receive frame area */ 93 struct mbuf *rfa_tailm; /* last mbuf in receive frame area */ 94 struct fxp_stats *fxp_stats; /* Pointer to interface stats */ 95 int tx_queued; /* # of active TxCB's */ 96 int promisc_mode; /* promiscuous mode enabled */ 97}; 98 99#include "fxp.h" 100static struct fxp_softc *fxp_sc[NFXP]; /* XXX Yuck */ 101 102static u_long fxp_count; 103 104/* 105 * Template for default configuration parameters. 106 * See struct fxp_cb_config for the bit definitions. 107 */ 108static u_char fxp_cb_config_template[] = { 109 0x0, 0x0, /* cb_status */ 110 0x80, 0x2, /* cb_command */ 111 0xff, 0xff, 0xff, 0xff, /* link_addr */ 112 0x16, /* 0 */ 113 0x8, /* 1 */ 114 0x0, /* 2 */ 115 0x0, /* 3 */ 116 0x0, /* 4 */ 117 0x80, /* 5 */ 118 0xb2, /* 6 */ 119 0x3, /* 7 */ 120 0x1, /* 8 */ 121 0x0, /* 9 */ 122 0x26, /* 10 */ 123 0x0, /* 11 */ 124 0x60, /* 12 */ 125 0x0, /* 13 */ 126 0xf2, /* 14 */ 127 0x48, /* 15 */ 128 0x0, /* 16 */ 129 0x40, /* 17 */ 130 0xf3, /* 18 */ 131 0x0, /* 19 */ 132 0x3f, /* 20 */ 133 0x5, /* 21 */ 134 0x0, 0x0 135}; 136 137static inline int fxp_scb_wait __P((struct fxp_csr *)); 138static char *fxp_probe __P((pcici_t, pcidi_t)); 139static void fxp_attach __P((pcici_t, int)); 140static int fxp_shutdown __P((struct kern_devconf *, int)); 141static void fxp_intr __P((void *)); 142static void fxp_start __P((struct ifnet *)); 143static int fxp_ioctl __P((struct ifnet *, int, caddr_t)); 144static void fxp_init __P((struct ifnet *)); 145static void fxp_stop __P((struct fxp_softc *)); 146static void fxp_watchdog __P((struct ifnet *)); 147static void fxp_get_macaddr __P((struct fxp_softc *)); 148static int fxp_add_rfabuf __P((struct fxp_softc *, struct mbuf *)); 149 150timeout_t fxp_stats_update; 151 152static struct pci_device fxp_device = { 153 "fxp", 154 fxp_probe, 155 fxp_attach, 156 &fxp_count, 157 fxp_shutdown 158}; 159DATA_SET(pcidevice_set, fxp_device); 160 161/* 162 * Number of transmit control blocks. This determines the number 163 * of transmit buffers that can be chained in the CB list. 164 * This must be a power of two. 165 */ 166#define FXP_NTXCB 64 167 168/* 169 * TxCB list index mask. This is used to do list wrap-around. 170 */ 171#define FXP_TXCB_MASK (FXP_NTXCB - 1) 172 173/* 174 * Number of DMA segments in a TxCB. Note that this is carefully 175 * chosen to make the total struct size an even power of two. It's 176 * critical that no TxCB be split across a page boundry since 177 * no attempt is made to allocate physically contiguous memory. 178 * 179 * XXX - don't forget to change the hard-coded constant in the 180 * fxp_cb_tx struct (defined in if_fxpreg.h), too! 181 */ 182#define FXP_NTXSEG 29 183 184/* 185 * Number of receive frame area buffers. These are large so chose 186 * wisely. 187 */ 188#define FXP_NRFABUFS 32 189 190/* 191 * Wait for the previous command to be accepted (but not necessarily 192 * completed). 193 */ 194static inline int 195fxp_scb_wait(csr) 196 struct fxp_csr *csr; 197{ 198 int i = 10000; 199 200 while ((csr->scb_command & FXP_SCB_COMMAND_MASK) && --i); 201 return (i); 202} 203 204/* 205 * Return identification string if this is device is ours. 206 */ 207static char * 208fxp_probe(config_id, device_id) 209 pcici_t config_id; 210 pcidi_t device_id; 211{ 212 if (((device_id & 0xffff) == FXP_VENDORID_INTEL) && 213 ((device_id >> 16) & 0xffff) == FXP_DEVICEID_i82557) 214 return ("Intel EtherExpress Pro/100B Fast Ethernet"); 215 216 return NULL; 217} 218 219/* 220 * Allocate data structures and attach the device. 221 */ 222static void 223fxp_attach(config_id, unit) 224 pcici_t config_id; 225 int unit; 226{ 227 struct fxp_softc *sc; 228 struct ifnet *ifp; 229 vm_offset_t pbase; 230 int s, i; 231 232 sc = malloc(sizeof(struct fxp_softc), M_DEVBUF, M_NOWAIT); 233 if (sc == NULL) 234 return; 235 bzero(sc, sizeof(struct fxp_softc)); 236 237 s = splimp(); 238 239 /* 240 * Map control/status registers. 241 */ 242 if (!pci_map_mem(config_id, FXP_PCI_MMBA, 243 (vm_offset_t *)&sc->csr, &pbase)) { 244 printf("fxp%d: couldn't map memory\n", unit); 245 goto fail; 246 } 247 248 /* 249 * Issue a software reset. 250 */ 251 sc->csr->port = 0; 252 DELAY(10); 253 254 /* 255 * Allocate our interrupt. 256 */ 257 if (!pci_map_int(config_id, fxp_intr, sc, &net_imask)) { 258 printf("fxp%d: couldn't map interrupt\n", unit); 259 goto fail; 260 } 261 262 sc->cbl_base = malloc(sizeof(struct fxp_cb_tx) * FXP_NTXCB, 263 M_DEVBUF, M_NOWAIT); 264 if (sc->cbl_base == NULL) 265 goto malloc_fail; 266 267 sc->fxp_stats = malloc(sizeof(struct fxp_stats), M_DEVBUF, M_NOWAIT); 268 if (sc->fxp_stats == NULL) 269 goto malloc_fail; 270 bzero(sc->fxp_stats, sizeof(struct fxp_stats)); 271 272 /* 273 * Pre-allocate our receive buffers. 274 */ 275 for (i = 0; i < FXP_NRFABUFS; i++) { 276 if (fxp_add_rfabuf(sc, NULL) != 0) { 277 goto malloc_fail; 278 } 279 } 280 281 fxp_sc[unit] = sc; 282 283 ifp = &sc->arpcom.ac_if; 284 ifp->if_unit = unit; 285 ifp->if_name = "fxp"; 286 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 287 ifp->if_ioctl = fxp_ioctl; 288 ifp->if_output = ether_output; 289 ifp->if_start = fxp_start; 290 ifp->if_watchdog = fxp_watchdog; 291 292 fxp_get_macaddr(sc); 293 printf("fxp%d: Ethernet address %6D\n", unit, 294 sc->arpcom.ac_enaddr, ":"); 295 296 /* 297 * Attach the interface. 298 */ 299 if_attach(ifp); 300#if NBPFILTER > 0 301 bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 302#endif 303 splx(s); 304 return; 305 306malloc_fail: 307 printf("fxp%d: Failed to malloc memory\n", unit); 308 (void) pci_unmap_int(config_id); 309 if (sc && sc->cbl_base) 310 free(sc->cbl_base, M_DEVBUF); 311 if (sc && sc->fxp_stats) 312 free(sc->fxp_stats, M_DEVBUF); 313 /* frees entire chain */ 314 if (sc && sc->rfa_headm) 315 m_freem(sc->rfa_headm); 316fail: 317 if (sc) 318 free(sc, M_DEVBUF); 319 splx(s); 320} 321 322/* 323 * Read station (MAC) address from serial EEPROM. Basically, you 324 * manually shift in the read opcode (one bit at a time) and then 325 * shift in the address, and then you shift out the data (all of 326 * this one bit at a time). The word size is 16 bits, so you have 327 * to provide the address for every 16 bits of data. The MAC address 328 * is in the first 3 words (6 bytes total). 329 */ 330static void 331fxp_get_macaddr(sc) 332 struct fxp_softc *sc; 333{ 334 struct fxp_csr *csr; 335 u_short reg, *data; 336 int i, x; 337 338 csr = sc->csr; 339 data = (u_short *)sc->arpcom.ac_enaddr; 340 341 for (i = 0; i < 3; i++) { 342 csr->eeprom_control = FXP_EEPROM_EECS; 343 /* 344 * Shift in read opcode. 345 */ 346 for (x = 3; x > 0; x--) { 347 if (FXP_EEPROM_OPC_READ & (1 << (x - 1))) { 348 reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI; 349 } else { 350 reg = FXP_EEPROM_EECS; 351 } 352 csr->eeprom_control = reg; 353 csr->eeprom_control = reg | FXP_EEPROM_EESK; 354 DELAY(1); 355 csr->eeprom_control = reg; 356 DELAY(1); 357 } 358 /* 359 * Shift in address. 360 */ 361 for (x = 6; x > 0; x--) { 362 if (i & (1 << (x - 1))) { 363 reg = FXP_EEPROM_EECS | FXP_EEPROM_EEDI; 364 } else { 365 reg = FXP_EEPROM_EECS; 366 } 367 csr->eeprom_control = reg; 368 csr->eeprom_control = reg | FXP_EEPROM_EESK; 369 DELAY(1); 370 csr->eeprom_control = reg; 371 DELAY(1); 372 } 373 reg = FXP_EEPROM_EECS; 374 data[i] = 0; 375 /* 376 * Shift out data. 377 */ 378 for (x = 16; x > 0; x--) { 379 csr->eeprom_control = reg | FXP_EEPROM_EESK; 380 DELAY(1); 381 if (csr->eeprom_control & FXP_EEPROM_EEDO) 382 data[i] |= (1 << (x - 1)); 383 csr->eeprom_control = reg; 384 DELAY(1); 385 } 386 csr->eeprom_control = 0; 387 DELAY(1); 388 } 389} 390 391/* 392 * Device shutdown routine. Usually called at system shutdown. The 393 * main purpose of this routine is to shut off receiver DMA so that 394 * kernel memory doesn't get clobbered during warmboot. 395 */ 396static int 397fxp_shutdown(kdc, force) 398 struct kern_devconf *kdc; 399 int force; 400{ 401 struct fxp_softc *sc = fxp_sc[kdc->kdc_unit]; 402 403 fxp_stop(sc); 404 405 (void) dev_detach(kdc); 406 return 0; 407} 408 409/* 410 * Start packet transmission on the interface. 411 */ 412static void 413fxp_start(ifp) 414 struct ifnet *ifp; 415{ 416 struct fxp_softc *sc = (struct fxp_softc *)ifp; 417 struct fxp_csr *csr = sc->csr; 418 struct fxp_cb_tx *txp; 419 struct mbuf *m, *mb_head; 420 int segment; 421 422txloop: 423 /* 424 * See if a TxCB is available. If not, indicate this to the 425 * outside world and exit. 426 */ 427 if (sc->tx_queued >= FXP_NTXCB) { 428 ifp->if_flags |= IFF_OACTIVE; 429 return; 430 } 431 /* 432 * Grab a packet to transmit. 433 */ 434 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, mb_head); 435 if (mb_head == NULL) { 436 /* 437 * No more packets to send. 438 */ 439 return; 440 } 441 442 /* 443 * Get pointer to next available (unused) descriptor. 444 */ 445 txp = sc->cbl_last->next; 446 447 /* 448 * Go through each of the mbufs in the chain and initialize 449 * the transmit buffers descriptors with the physical address 450 * and size of the mbuf. 451 */ 452tbdinit: 453 for (m = mb_head, segment = 0; m != NULL; m = m->m_next) { 454 if (m->m_len != 0) { 455 if (segment == FXP_NTXSEG) 456 break; 457 txp->tbd[segment].tb_addr = 458 vtophys(mtod(m, vm_offset_t)); 459 txp->tbd[segment].tb_size = m->m_len; 460 segment++; 461 } 462 } 463 if (m != NULL && segment == FXP_NTXSEG) { 464 struct mbuf *mn; 465 466 /* 467 * We ran out of segments. We have to recopy this mbuf 468 * chain first. 469 */ 470 MGETHDR(mn, M_DONTWAIT, MT_DATA); 471 if (mn == NULL) { 472 m_freem(mb_head); 473 return; 474 } 475 if (mb_head->m_pkthdr.len > MHLEN) { 476 MCLGET(mn, M_DONTWAIT); 477 if ((mn->m_flags & M_EXT) == 0) { 478 m_freem(mn); 479 m_freem(mb_head); 480 return; 481 } 482 } 483 m_copydata(mb_head, 0, mb_head->m_pkthdr.len, mtod(mn, caddr_t)); 484 mn->m_pkthdr.len = mn->m_len = mb_head->m_pkthdr.len; 485 m_freem(mb_head); 486 mb_head = mn; 487 goto tbdinit; 488 } 489 490 txp->tbd_number = segment; 491 492 /* 493 * Finish the initialization of this TxCB. 494 */ 495 txp->cb_status = 0; 496 txp->cb_command = 497 FXP_CB_COMMAND_XMIT | FXP_CB_COMMAND_SF | FXP_CB_COMMAND_S; 498 txp->tx_threshold = 16; /* bytes*8 */ 499 txp->mb_head = mb_head; 500 501 /* 502 * Advance the end-of-list forward. 503 */ 504 sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S; 505 sc->cbl_last = txp; 506 507 /* 508 * If no packets were previously queued then advance the first 509 * pointer to this TxCB. 510 */ 511 if (sc->tx_queued++ == 0) { 512 sc->cbl_first = txp; 513 } 514 515 if (!fxp_scb_wait(csr)) { 516 /* 517 * Hmmm, card has gone out to lunch 518 */ 519 fxp_init(ifp); 520 goto txloop; 521 } 522 523 /* 524 * Resume transmission if suspended. 525 */ 526 csr->scb_command = FXP_SCB_COMMAND_CU_RESUME; 527 528#if NBPFILTER > 0 529 /* 530 * Pass packet to bpf if there is a listener. 531 */ 532 if (sc->bpf != NULL) 533 bpf_mtap(sc->bpf, mb_head); 534#endif 535 /* 536 * Set a 5 second timer just in case we don't hear from the 537 * card again. 538 */ 539 ifp->if_timer = 5; 540 541 goto txloop; 542} 543 544/* 545 * Process interface interrupts. Returns 1 if the interrupt 546 * was handled, 0 if it wasn't. 547 */ 548static void 549fxp_intr(arg) 550 void *arg; 551{ 552 struct fxp_softc *sc = arg; 553 struct fxp_csr *csr = sc->csr; 554 struct ifnet *ifp = &sc->arpcom.ac_if; 555 u_char statack; 556 557 while ((statack = csr->scb_statack) != 0) { 558 /* 559 * First ACK all the interrupts in this pass. 560 */ 561 csr->scb_statack = statack; 562 563 /* 564 * Free any finished transmit mbuf chains. 565 */ 566 if (statack & FXP_SCB_STATACK_CNA) { 567 struct fxp_cb_tx *txp; 568 569 for (txp = sc->cbl_first; 570 (txp->cb_status & FXP_CB_STATUS_C) && 571 txp->mb_head != NULL; 572 txp = txp->next) { 573 m_freem(txp->mb_head); 574 txp->mb_head = NULL; 575 sc->tx_queued--; 576 } 577 sc->cbl_first = txp; 578 /* 579 * We unconditionally clear IFF_OACTIVE since it 580 * doesn't hurt to do so even if the tx queue is 581 * still full - it will just get set again in 582 * fxp_start(). If we get a CNA interrupt, it is 583 * (almost?) certain that we've freed up space for 584 * at least one more packet. 585 */ 586 ifp->if_flags &= ~IFF_OACTIVE; 587 /* 588 * Clear watchdog timer. It may or may not be set 589 * again in fxp_start(). 590 */ 591 ifp->if_timer = 0; 592 fxp_start(ifp); 593 } 594 /* 595 * Process receiver interrupts. If a no-resource (RNR) 596 * condition exists, get whatever packets we can and 597 * re-start the receiver. 598 */ 599 if (statack & (FXP_SCB_STATACK_FR | FXP_SCB_STATACK_RNR)) { 600 struct mbuf *m; 601 struct fxp_rfa *rfa; 602rcvloop: 603 m = sc->rfa_headm; 604 rfa = (struct fxp_rfa *)m->m_ext.ext_buf; 605 606 if (rfa->rfa_status & FXP_RFA_STATUS_C) { 607 /* 608 * Remove first packet from the chain. 609 */ 610 sc->rfa_headm = m->m_next; 611 m->m_next = NULL; 612 613 /* 614 * Add a new buffer to the receive chain. If this 615 * fails, the old buffer is recycled instead. 616 */ 617 if (fxp_add_rfabuf(sc, m) == 0) { 618 struct ether_header *eh; 619 u_short total_len; 620 621 total_len = rfa->actual_size & (MCLBYTES - 1); 622 m->m_pkthdr.rcvif = ifp; 623 m->m_pkthdr.len = m->m_len = total_len - 624 sizeof(struct ether_header); 625 eh = mtod(m, struct ether_header *); 626#if NBPFILTER > 0 627 if (sc->bpf != NULL) { 628 bpf_tap(sc->bpf, mtod(m, caddr_t), total_len); 629 /* 630 * Only pass this packet up if it is for us. 631 */ 632 if ((ifp->if_flags & IFF_PROMISC) && 633 (rfa->rfa_status & FXP_RFA_STATUS_IAMATCH) && 634 (eh->ether_dhost[0] & 1) == 0) { 635 m_freem(m); 636 goto rcvloop; 637 } 638 } 639#endif 640 m->m_data += sizeof(struct ether_header); 641 ether_input(ifp, eh, m); 642 } 643 goto rcvloop; 644 } 645 if (statack & FXP_SCB_STATACK_RNR) { 646 struct fxp_csr *csr = sc->csr; 647 648 (void) fxp_scb_wait(csr); 649 csr->scb_general = vtophys(sc->rfa_headm->m_ext.ext_buf); 650 csr->scb_command = FXP_SCB_COMMAND_RU_START; 651 } 652 } 653 } 654} 655 656/* 657 * Update packet in/out/collision statistics. The i82557 doesn't 658 * allow you to access these counters without doing a fairly 659 * expensive DMA to get _all_ of the statistics it maintains, so 660 * we do this operation here only once per second. The statistics 661 * counters in the kernel are updated from the previous dump-stats 662 * DMA and then a new dump-stats DMA is started. The on-chip 663 * counters are zeroed when the DMA completes. If we can't start 664 * the DMA immediately, we don't wait - we just prepare to read 665 * them again next time. 666 */ 667void 668fxp_stats_update(arg) 669 void *arg; 670{ 671 struct fxp_softc *sc = arg; 672 struct ifnet *ifp = &sc->arpcom.ac_if; 673 struct fxp_stats *sp = sc->fxp_stats; 674 675 ifp->if_opackets += sp->tx_good; 676 ifp->if_collisions += sp->tx_total_collisions; 677 ifp->if_ipackets += sp->rx_good; 678 ifp->if_ierrors += 679 sp->rx_crc_errors + 680 sp->rx_alignment_errors + 681 sp->rx_rnr_errors + 682 sp->rx_overrun_errors + 683 sp->rx_shortframes; 684 /* 685 * If there is no pending command, start another stats 686 * dump. Otherwise punt for now. 687 */ 688 if ((sc->csr->scb_command & FXP_SCB_COMMAND_MASK) == 0) { 689 /* 690 * Start another stats dump. By waiting for it to be 691 * accepted, we avoid having to do splhigh locking when 692 * writing scb_command in other parts of the driver. 693 */ 694 sc->csr->scb_command = FXP_SCB_COMMAND_CU_DUMPRESET; 695 (void) fxp_scb_wait(sc->csr); 696 } else { 697 /* 698 * A previous command is still waiting to be accepted. 699 * Just zero our copy of the stats and wait for the 700 * next timer event to update them. 701 */ 702 sp->tx_good = 0; 703 sp->tx_total_collisions = 0; 704 705 sp->rx_good = 0; 706 sp->rx_crc_errors = 0; 707 sp->rx_alignment_errors = 0; 708 sp->rx_rnr_errors = 0; 709 sp->rx_overrun_errors = 0; 710 sp->rx_shortframes = 0;; 711 } 712 /* 713 * Schedule another timeout one second from now. 714 */ 715 timeout(fxp_stats_update, sc, hz); 716} 717 718/* 719 * Stop the interface. Cancels the statistics updater and resets 720 * the interface. 721 */ 722static void 723fxp_stop(sc) 724 struct fxp_softc *sc; 725{ 726 struct ifnet *ifp = &sc->arpcom.ac_if; 727 struct fxp_cb_tx *txp; 728 int i; 729 730 /* 731 * Cancel stats updater. 732 */ 733 untimeout(fxp_stats_update, sc); 734 735 /* 736 * Issue software reset 737 */ 738 sc->csr->port = 0; 739 DELAY(10); 740 741 /* 742 * Release any xmit buffers. 743 */ 744 for (txp = sc->cbl_first; txp != NULL && txp->mb_head != NULL; 745 txp = txp->next) { 746 m_freem(txp->mb_head); 747 txp->mb_head = NULL; 748 } 749 sc->tx_queued = 0; 750 751 /* 752 * Free all the receive buffers then reallocate/reinitialize 753 */ 754 if (sc->rfa_headm != NULL) 755 m_freem(sc->rfa_headm); 756 sc->rfa_headm = NULL; 757 sc->rfa_tailm = NULL; 758 for (i = 0; i < FXP_NRFABUFS; i++) { 759 if (fxp_add_rfabuf(sc, NULL) != 0) { 760 /* 761 * This "can't happen" - we're at splimp() 762 * and we just freed all the buffers we need 763 * above. 764 */ 765 panic("fxp_stop: no buffers!"); 766 } 767 } 768 769 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 770 ifp->if_timer = 0; 771} 772 773/* 774 * Watchdog/transmission transmit timeout handler. Called when a 775 * transmission is started on the interface, but no interrupt is 776 * received before the timeout. This usually indicates that the 777 * card has wedged for some reason. 778 */ 779static void 780fxp_watchdog(ifp) 781 struct ifnet *ifp; 782{ 783 log(LOG_ERR, "fxp%d: device timeout\n", ifp->if_unit); 784 ifp->if_oerrors++; 785 786 fxp_init(ifp); 787} 788 789static void 790fxp_init(ifp) 791 struct ifnet *ifp; 792{ 793 struct fxp_softc *sc = (struct fxp_softc *)ifp; 794 struct fxp_cb_config *cbp; 795 struct fxp_cb_ias *cb_ias; 796 struct fxp_cb_tx *txp; 797 struct fxp_csr *csr = sc->csr; 798 int i, s, mcast, prm; 799 800 s = splimp(); 801 /* 802 * Cancel any pending I/O 803 */ 804 fxp_stop(sc); 805 806 prm = (ifp->if_flags & IFF_PROMISC) ? 1 : 0; 807 sc->promisc_mode = prm; 808 /* 809 * Sleeze out here and enable reception of all multicasts if 810 * multicasts are enabled. Ideally, we'd program the multicast 811 * address filter to only accept specific multicasts. 812 */ 813 mcast = (ifp->if_flags & (IFF_MULTICAST|IFF_ALLMULTI)) ? 1 : 0; 814 815 /* 816 * Initialize base of CBL and RFA memory. Loading with zero 817 * sets it up for regular linear addressing. 818 */ 819 csr->scb_general = 0; 820 csr->scb_command = FXP_SCB_COMMAND_CU_BASE; 821 822 (void) fxp_scb_wait(csr); 823 csr->scb_command = FXP_SCB_COMMAND_RU_BASE; 824 825 /* 826 * Initialize base of dump-stats buffer. 827 */ 828 (void) fxp_scb_wait(csr); 829 csr->scb_general = vtophys(sc->fxp_stats); 830 csr->scb_command = FXP_SCB_COMMAND_CU_DUMP_ADR; 831 832 /* 833 * We temporarily use memory that contains the TxCB list to 834 * construct the config CB. The TxCB list memory is rebuilt 835 * later. 836 */ 837 cbp = (struct fxp_cb_config *) sc->cbl_base; 838 839 /* 840 * This bcopy is kind of disgusting, but there are a bunch of must be 841 * zero and must be one bits in this structure and this is the easiest 842 * way to initialize them all to proper values. 843 */ 844 bcopy(fxp_cb_config_template, cbp, sizeof(struct fxp_cb_config)); 845 846 cbp->cb_status = 0; 847 cbp->cb_command = FXP_CB_COMMAND_CONFIG | FXP_CB_COMMAND_EL; 848 cbp->link_addr = -1; /* (no) next command */ 849 cbp->byte_count = 22; /* (22) bytes to config */ 850 cbp->rx_fifo_limit = 8; /* rx fifo threshold */ 851 cbp->tx_fifo_limit = 0; /* tx fifo threshold */ 852 cbp->adaptive_ifs = 0; /* (no) adaptive interframe spacing */ 853 cbp->rx_dma_bytecount = 0; /* (no) rx DMA max */ 854 cbp->tx_dma_bytecount = 0; /* (no) tx DMA max */ 855 cbp->dma_bce = 1; /* (enable) dma max counters */ 856 cbp->late_scb = 0; /* (don't) defer SCB update */ 857 cbp->tno_int = 0; /* (disable) tx not okay interrupt */ 858 cbp->ci_int = 0; /* (do) interrupt on CU not active */ 859 cbp->save_bf = prm; /* save bad frames */ 860 cbp->disc_short_rx = !prm; /* discard short packets */ 861 cbp->underrun_retry = 1; /* retry mode (1) on DMA underrun */ 862 cbp->mediatype = 1; /* (MII) interface mode */ 863 cbp->nsai = 1; /* (don't) disable source addr insert */ 864 cbp->preamble_length = 2; /* (7 byte) preamble */ 865 cbp->loopback = 0; /* (don't) loopback */ 866 cbp->linear_priority = 0; /* (normal CSMA/CD operation) */ 867 cbp->linear_pri_mode = 0; /* (wait after xmit only) */ 868 cbp->interfrm_spacing = 6; /* (96 bits of) interframe spacing */ 869 cbp->promiscuous = prm; /* promiscuous mode */ 870 cbp->bcast_disable = 0; /* (don't) disable broadcasts */ 871 cbp->crscdt = 0; /* (CRS only) */ 872 cbp->stripping = !prm; /* truncate rx packet to byte count */ 873 cbp->padding = 1; /* (do) pad short tx packets */ 874 cbp->rcv_crc_xfer = 0; /* (don't) xfer CRC to host */ 875 cbp->force_fdx = 0; /* (don't) force full duplex */ 876 cbp->fdx_pin_en = 1; /* (enable) FDX# pin */ 877 cbp->multi_ia = 0; /* (don't) accept multiple IAs */ 878 cbp->mc_all = mcast; /* accept all multicasts */ 879 880 /* 881 * Start the config command/DMA. 882 */ 883 (void) fxp_scb_wait(csr); 884 csr->scb_general = vtophys(cbp); 885 csr->scb_command = FXP_SCB_COMMAND_CU_START; 886 /* ...and wait for it to complete. */ 887 while (!(cbp->cb_status & FXP_CB_STATUS_C)); 888 889 /* 890 * Now initialize the station address. Temporarily use the TxCB 891 * memory area like we did above for the config CB. 892 */ 893 cb_ias = (struct fxp_cb_ias *) sc->cbl_base; 894 cb_ias->cb_status = 0; 895 cb_ias->cb_command = FXP_CB_COMMAND_IAS | FXP_CB_COMMAND_EL; 896 cb_ias->link_addr = -1; 897 bcopy(sc->arpcom.ac_enaddr, (void *)cb_ias->macaddr, 898 sizeof(sc->arpcom.ac_enaddr)); 899 900 /* 901 * Start the IAS (Individual Address Setup) command/DMA. 902 */ 903 (void) fxp_scb_wait(csr); 904 csr->scb_command = FXP_SCB_COMMAND_CU_START; 905 /* ...and wait for it to complete. */ 906 while (!(cb_ias->cb_status & FXP_CB_STATUS_C)); 907 908 /* 909 * Initialize transmit control block (TxCB) list. 910 */ 911 912 txp = sc->cbl_base; 913 bzero(txp, sizeof(struct fxp_cb_tx) * FXP_NTXCB); 914 for (i = 0; i < FXP_NTXCB; i++) { 915 txp[i].cb_status = FXP_CB_STATUS_C | FXP_CB_STATUS_OK; 916 txp[i].cb_command = FXP_CB_COMMAND_NOP; 917 txp[i].link_addr = vtophys(&txp[(i + 1) & FXP_TXCB_MASK]); 918 txp[i].tbd_array_addr = vtophys(&txp[i].tbd[0]); 919 txp[i].next = &txp[(i + 1) & FXP_TXCB_MASK]; 920 } 921 /* 922 * Set the stop flag on the first TxCB and start the control 923 * unit. It will execute the NOP and then suspend. 924 */ 925 txp->cb_command = FXP_CB_COMMAND_NOP | FXP_CB_COMMAND_S; 926 sc->cbl_first = sc->cbl_last = txp; 927 sc->tx_queued = 0; 928 929 (void) fxp_scb_wait(csr); 930 csr->scb_command = FXP_SCB_COMMAND_CU_START; 931 932 /* 933 * Initialize receiver buffer area - RFA. 934 */ 935 (void) fxp_scb_wait(csr); 936 csr->scb_general = vtophys(sc->rfa_headm->m_ext.ext_buf); 937 csr->scb_command = FXP_SCB_COMMAND_RU_START; 938 939 ifp->if_flags |= IFF_RUNNING; 940 ifp->if_flags &= ~IFF_OACTIVE; 941 splx(s); 942 943 /* 944 * Start stats updater. 945 */ 946 timeout(fxp_stats_update, sc, hz); 947} 948 949/* 950 * Add a buffer to the end of the RFA buffer list. 951 * Return 0 if successful, 1 for failure. A failure results in 952 * adding the 'oldm' (if non-NULL) on to the end of the list - 953 * tossing out it's old contents and recycling it. 954 * The RFA struct is stuck at the beginning of mbuf cluster and the 955 * data pointer is fixed up to point just past it. 956 */ 957static int 958fxp_add_rfabuf(sc, oldm) 959 struct fxp_softc *sc; 960 struct mbuf *oldm; 961{ 962 struct mbuf *m; 963 struct fxp_rfa *rfa, *p_rfa; 964 965 MGETHDR(m, M_DONTWAIT, MT_DATA); 966 if (m != NULL) { 967 MCLGET(m, M_DONTWAIT); 968 if ((m->m_flags & M_EXT) == 0) { 969 m_freem(m); 970 m = oldm; 971 } 972 } else { 973 m = oldm; 974 } 975 if (m == NULL) 976 return 1; 977 rfa = mtod(m, struct fxp_rfa *); 978 rfa->rfa_status = 0; 979 rfa->rfa_control = FXP_RFA_CONTROL_EL; 980 rfa->link_addr = -1; 981 rfa->rbd_addr = -1; 982 rfa->actual_size = 0; 983 rfa->size = MCLBYTES - sizeof(struct fxp_rfa); 984 m->m_data += sizeof(struct fxp_rfa); 985 /* 986 * If there are other buffers already on the list, attach this 987 * one to the end by fixing up the tail to point to this one. 988 */ 989 if (sc->rfa_headm != NULL) { 990 p_rfa = (struct fxp_rfa *) sc->rfa_tailm->m_ext.ext_buf; 991 sc->rfa_tailm->m_next = m; 992 p_rfa->link_addr = vtophys(rfa); 993 p_rfa->rfa_control &= ~FXP_RFA_CONTROL_EL; 994 } else { 995 sc->rfa_headm = m; 996 } 997 sc->rfa_tailm = m; 998 999 return (m == oldm); 1000} 1001 1002static int 1003fxp_ioctl(ifp, command, data) 1004 struct ifnet *ifp; 1005 int command; 1006 caddr_t data; 1007{ 1008 struct ifaddr *ifa = (struct ifaddr *) data; 1009 struct fxp_softc *sc = (struct fxp_softc *)ifp; 1010 struct ifreq *ifr = (struct ifreq *) data; 1011 int s, error = 0; 1012 1013 s = splimp(); 1014 1015 switch (command) { 1016 1017 case SIOCSIFADDR: 1018 ifp->if_flags |= IFF_UP; 1019 1020 switch (ifa->ifa_addr->sa_family) { 1021#ifdef INET 1022 case AF_INET: 1023 fxp_init(ifp); /* before arpwhohas */ 1024 arp_ifinit((struct arpcom *)ifp, ifa); 1025 break; 1026#endif 1027#ifdef IPX 1028 /* 1029 * XXX - This code is probably wrong 1030 */ 1031 case AF_IPX: 1032 { 1033 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 1034 1035 if (ipx_nullhost(*ina)) 1036 ina->x_host = 1037 *(union ipx_host *) (sc->arpcom.ac_enaddr); 1038 else { 1039 bcopy((caddr_t) ina->x_host.c_host, 1040 (caddr_t) sc->arpcom.ac_enaddr, 1041 sizeof(sc->arpcom.ac_enaddr)); 1042 } 1043 1044 /* 1045 * Set new address 1046 */ 1047 fxp_init(ifp); 1048 break; 1049 } 1050#endif 1051#ifdef NS 1052 /* 1053 * XXX - This code is probably wrong 1054 */ 1055 case AF_NS: 1056 { 1057 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 1058 1059 if (ns_nullhost(*ina)) 1060 ina->x_host = 1061 *(union ns_host *) (sc->arpcom.ac_enaddr); 1062 else { 1063 bcopy((caddr_t) ina->x_host.c_host, 1064 (caddr_t) sc->arpcom.ac_enaddr, 1065 sizeof(sc->arpcom.ac_enaddr)); 1066 } 1067 1068 /* 1069 * Set new address 1070 */ 1071 fxp_init(ifp); 1072 break; 1073 } 1074#endif 1075 default: 1076 fxp_init(ifp); 1077 break; 1078 } 1079 break; 1080 1081 case SIOCGIFADDR: 1082 { 1083 struct sockaddr *sa; 1084 1085 sa = (struct sockaddr *) & ifr->ifr_data; 1086 bcopy((caddr_t) sc->arpcom.ac_enaddr, 1087 (caddr_t) sa->sa_data, sizeof(sc->arpcom.ac_enaddr)); 1088 } 1089 break; 1090 1091 case SIOCSIFFLAGS: 1092 1093 /* 1094 * If interface is marked up and not running, then start it. 1095 * If it is marked down and running, stop it. 1096 * XXX If it's up then re-initialize it. This is so flags 1097 * such as IFF_PROMISC are handled. 1098 */ 1099 if (ifp->if_flags & IFF_UP) { 1100 fxp_init(ifp); 1101 } else { 1102 if (ifp->if_flags & IFF_RUNNING) 1103 fxp_stop(sc); 1104 } 1105 break; 1106 1107 case SIOCADDMULTI: 1108 case SIOCDELMULTI: 1109 /* 1110 * Update out multicast list. 1111 */ 1112 error = (command == SIOCADDMULTI) ? 1113 ether_addmulti(ifr, &sc->arpcom) : 1114 ether_delmulti(ifr, &sc->arpcom); 1115 1116 if (error == ENETRESET) { 1117 /* 1118 * Multicast list has changed; set the hardware filter 1119 * accordingly. 1120 */ 1121 fxp_init(ifp); 1122 1123 error = 0; 1124 } 1125 break; 1126 1127 case SIOCSIFMTU: 1128 /* 1129 * Set the interface MTU. 1130 */ 1131 if (ifr->ifr_mtu > ETHERMTU) { 1132 error = EINVAL; 1133 } else { 1134 ifp->if_mtu = ifr->ifr_mtu; 1135 } 1136 break; 1137 1138 default: 1139 error = EINVAL; 1140 } 1141 (void) splx(s); 1142 return (error); 1143} 1144