mb86960.c revision 1.35
1 /* $NetBSD: mb86960.c,v 1.35 1999/09/13 10:31:35 itojun Exp $ */ 2 3 /* 4 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 5 * 6 * This software may be used, modified, copied, distributed, and sold, in 7 * both source and binary form provided that the above copyright, these 8 * terms and the following disclaimer are retained. The name of the author 9 * and/or the contributor may not be used to endorse or promote products 10 * derived from this software without specific prior written permission. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND 13 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE 16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION. 19 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22 * SUCH DAMAGE. 23 */ 24 25 /* 26 * Portions copyright (C) 1993, David Greenman. This software may be used, 27 * modified, copied, distributed, and sold, in both source and binary form 28 * provided that the above copyright and these terms are retained. Under no 29 * circumstances is the author responsible for the proper functioning of this 30 * software, nor does the author assume any responsibility for damages 31 * incurred with its use. 32 */ 33 34 #define FE_VERSION "if_fe.c ver. 0.8" 35 36 /* 37 * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards. 38 * Contributed by M.S. <seki (at) sysrap.cs.fujitsu.co.jp> 39 * 40 * This version is intended to be a generic template for various 41 * MB86960A/MB86965A based Ethernet cards. It currently supports 42 * Fujitsu FMV-180 series (i.e., FMV-181 and FMV-182) and Allied- 43 * Telesis AT1700 series and RE2000 series. There are some 44 * unnecessary hooks embedded, which are primarily intended to support 45 * other types of Ethernet cards, but the author is not sure whether 46 * they are useful. 47 */ 48 49 #include "opt_inet.h" 50 #include "opt_ns.h" 51 #include "bpfilter.h" 52 #include "rnd.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/errno.h> 57 #include <sys/ioctl.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/syslog.h> 61 #include <sys/device.h> 62 #if NRND > 0 63 #include <sys/rnd.h> 64 #endif 65 66 #include <net/if.h> 67 #include <net/if_dl.h> 68 #include <net/if_types.h> 69 #include <net/if_media.h> 70 #include <net/if_ether.h> 71 72 #ifdef INET 73 #include <netinet/in.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #include <netinet/ip.h> 77 #include <netinet/if_inarp.h> 78 #endif 79 80 #ifdef NS 81 #include <netns/ns.h> 82 #include <netns/ns_if.h> 83 #endif 84 85 #if NBPFILTER > 0 86 #include <net/bpf.h> 87 #include <net/bpfdesc.h> 88 #endif 89 90 #include <machine/bus.h> 91 92 #include <dev/ic/mb86960reg.h> 93 #include <dev/ic/mb86960var.h> 94 95 #ifndef __BUS_SPACE_HAS_STREAM_METHODS 96 #define bus_space_write_multi_stream_2 bus_space_write_multi_2 97 #define bus_space_read_multi_stream_2 bus_space_read_multi_2 98 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ 99 100 /* Standard driver entry points. These can be static. */ 101 void mb86960_init __P((struct mb86960_softc *)); 102 int mb86960_ioctl __P((struct ifnet *, u_long, caddr_t)); 103 void mb86960_start __P((struct ifnet *)); 104 void mb86960_reset __P((struct mb86960_softc *)); 105 void mb86960_watchdog __P((struct ifnet *)); 106 107 /* Local functions. Order of declaration is confused. FIXME. */ 108 int mb86960_get_packet __P((struct mb86960_softc *, int)); 109 void mb86960_stop __P((struct mb86960_softc *)); 110 void mb86960_tint __P((struct mb86960_softc *, u_char)); 111 void mb86960_rint __P((struct mb86960_softc *, u_char)); 112 static __inline__ 113 void mb86960_xmit __P((struct mb86960_softc *)); 114 void mb86960_write_mbufs __P((struct mb86960_softc *, struct mbuf *)); 115 static __inline__ 116 void mb86960_droppacket __P((struct mb86960_softc *)); 117 void mb86960_getmcaf __P((struct ethercom *, u_char *)); 118 void mb86960_setmode __P((struct mb86960_softc *)); 119 void mb86960_loadmar __P((struct mb86960_softc *)); 120 121 int mb86960_mediachange __P((struct ifnet *)); 122 void mb86960_mediastatus __P((struct ifnet *, struct ifmediareq *)); 123 124 #if FE_DEBUG >= 1 125 void mb86960_dump __P((int, struct mb86960_softc *)); 126 #endif 127 128 void 129 mb86960_attach(sc, type, myea) 130 struct mb86960_softc *sc; 131 enum mb86960_type type; 132 u_int8_t *myea; 133 { 134 bus_space_tag_t bst = sc->sc_bst; 135 bus_space_handle_t bsh = sc->sc_bsh; 136 137 sc->type = type; 138 139 /* Register values which depend on board design. */ 140 sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; 141 sc->proto_dlcr5 = 0; 142 sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO; 143 144 switch (sc->type) { 145 case MB86960_TYPE_86960: 146 sc->proto_dlcr7 = FE_D7_BYTSWP_LH | FE_D7_IDENT_EC; 147 break; 148 case MB86960_TYPE_86965: 149 sc->proto_dlcr7 = FE_D7_BYTSWP_LH; 150 break; 151 } 152 153 /* 154 * Program the 86960 as follows: 155 * SRAM: 32KB, 100ns, byte-wide access. 156 * Transmission buffer: 4KB x 2. 157 * System bus interface: 16 bits. 158 * We cannot change these values but TXBSIZE, because they 159 * are hard-wired on the board. Modifying TXBSIZE will affect 160 * the driver performance. 161 */ 162 sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB | 163 FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns; 164 165 /* 166 * Minimum initialization of the hardware. 167 * We write into registers; hope I/O ports have no 168 * overlap with other boards. 169 */ 170 171 /* Initialize 86960. */ 172 bus_space_write_1(bst, bsh, FE_DLCR6, 173 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 174 delay(200); 175 176 #ifdef DIAGNOSTIC 177 if (myea == NULL) { 178 printf("%s: ethernet address shouldn't be NULL\n", 179 sc->sc_dev.dv_xname); 180 panic("NULL ethernet address"); 181 } 182 #endif 183 bcopy(myea, sc->sc_enaddr, sizeof(sc->sc_enaddr)); 184 185 /* Disable all interrupts. */ 186 bus_space_write_1(bst, bsh, FE_DLCR2, 0); 187 bus_space_write_1(bst, bsh, FE_DLCR3, 0); 188 } 189 190 /* 191 * Install interface into kernel networking data structures 192 */ 193 void 194 mb86960_config(sc, media, nmedia, defmedia) 195 struct mb86960_softc *sc; 196 int *media, nmedia, defmedia; 197 { 198 struct cfdata *cf = sc->sc_dev.dv_cfdata; 199 struct ifnet *ifp = &sc->sc_ec.ec_if; 200 int i; 201 202 /* Stop the 86960. */ 203 mb86960_stop(sc); 204 205 /* Initialize ifnet structure. */ 206 bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); 207 ifp->if_softc = sc; 208 ifp->if_start = mb86960_start; 209 ifp->if_ioctl = mb86960_ioctl; 210 ifp->if_watchdog = mb86960_watchdog; 211 ifp->if_flags = 212 IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; 213 214 #if FE_DEBUG >= 3 215 log(LOG_INFO, "%s: mb86960_config()\n", sc->sc_dev.dv_xname); 216 mb86960_dump(LOG_INFO, sc); 217 #endif 218 219 #if FE_SINGLE_TRANSMISSION 220 /* Override txb config to allocate minimum. */ 221 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ 222 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 223 #endif 224 225 /* Modify hardware config if it is requested. */ 226 if ((cf->cf_flags & FE_FLAGS_OVERRIDE_DLCR6) != 0) 227 sc->proto_dlcr6 = cf->cf_flags & FE_FLAGS_DLCR6_VALUE; 228 229 /* Find TX buffer size, based on the hardware dependent proto. */ 230 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { 231 case FE_D6_TXBSIZ_2x2KB: 232 sc->txb_size = 2048; 233 break; 234 case FE_D6_TXBSIZ_2x4KB: 235 sc->txb_size = 4096; 236 break; 237 case FE_D6_TXBSIZ_2x8KB: 238 sc->txb_size = 8192; 239 break; 240 default: 241 /* Oops, we can't work with single buffer configuration. */ 242 #if FE_DEBUG >= 2 243 log(LOG_WARNING, "%s: strange TXBSIZ config; fixing\n", 244 sc->sc_dev.dv_xname); 245 #endif 246 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; 247 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 248 sc->txb_size = 2048; 249 break; 250 } 251 252 /* Initialize media goo. */ 253 ifmedia_init(&sc->sc_media, 0, mb86960_mediachange, 254 mb86960_mediastatus); 255 if (media != NULL) { 256 for (i = 0; i < nmedia; i++) 257 ifmedia_add(&sc->sc_media, media[i], 0, NULL); 258 ifmedia_set(&sc->sc_media, defmedia); 259 } else { 260 ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); 261 ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); 262 } 263 264 /* Attach the interface. */ 265 if_attach(ifp); 266 ether_ifattach(ifp, sc->sc_enaddr); 267 268 #if NBPFILTER > 0 269 /* If BPF is in the kernel, call the attach for it. */ 270 bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); 271 #endif 272 #if NRND > 0 273 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, 274 RND_TYPE_NET, 0); 275 #endif 276 /* Print additional info when attached. */ 277 printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname, 278 ether_sprintf(sc->sc_enaddr)); 279 280 #if FE_DEBUG >= 3 281 { 282 int buf, txb, bbw, sbw, ram; 283 284 buf = txb = bbw = sbw = ram = -1; 285 switch (sc->proto_dlcr6 & FE_D6_BUFSIZ) { 286 case FE_D6_BUFSIZ_8KB: 287 buf = 8; 288 break; 289 case FE_D6_BUFSIZ_16KB: 290 buf = 16; 291 break; 292 case FE_D6_BUFSIZ_32KB: 293 buf = 32; 294 break; 295 case FE_D6_BUFSIZ_64KB: 296 buf = 64; 297 break; 298 } 299 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { 300 case FE_D6_TXBSIZ_2x2KB: 301 txb = 2; 302 break; 303 case FE_D6_TXBSIZ_2x4KB: 304 txb = 4; 305 break; 306 case FE_D6_TXBSIZ_2x8KB: 307 txb = 8; 308 break; 309 } 310 switch (sc->proto_dlcr6 & FE_D6_BBW) { 311 case FE_D6_BBW_BYTE: 312 bbw = 8; 313 break; 314 case FE_D6_BBW_WORD: 315 bbw = 16; 316 break; 317 } 318 switch (sc->proto_dlcr6 & FE_D6_SBW) { 319 case FE_D6_SBW_BYTE: 320 sbw = 8; 321 break; 322 case FE_D6_SBW_WORD: 323 sbw = 16; 324 break; 325 } 326 switch (sc->proto_dlcr6 & FE_D6_SRAM) { 327 case FE_D6_SRAM_100ns: 328 ram = 100; 329 break; 330 case FE_D6_SRAM_150ns: 331 ram = 150; 332 break; 333 } 334 printf("%s: SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n", 335 sc->sc_dev.dv_xname, buf, bbw, ram, txb, sbw); 336 } 337 #endif 338 } 339 340 /* 341 * Media change callback. 342 */ 343 int 344 mb86960_mediachange(ifp) 345 struct ifnet *ifp; 346 { 347 struct mb86960_softc *sc = ifp->if_softc; 348 349 if (sc->sc_mediachange) 350 return ((*sc->sc_mediachange)(sc)); 351 return (0); 352 } 353 354 /* 355 * Media status callback. 356 */ 357 void 358 mb86960_mediastatus(ifp, ifmr) 359 struct ifnet *ifp; 360 struct ifmediareq *ifmr; 361 { 362 struct mb86960_softc *sc = ifp->if_softc; 363 364 if (sc->sc_enabled == 0) { 365 ifmr->ifm_active = IFM_ETHER | IFM_NONE; 366 ifmr->ifm_status = 0; 367 return; 368 } 369 370 if (sc->sc_mediastatus) 371 (*sc->sc_mediastatus)(sc, ifmr); 372 } 373 374 /* 375 * Reset interface. 376 */ 377 void 378 mb86960_reset(sc) 379 struct mb86960_softc *sc; 380 { 381 int s; 382 383 s = splnet(); 384 mb86960_stop(sc); 385 mb86960_init(sc); 386 splx(s); 387 } 388 389 /* 390 * Stop everything on the interface. 391 * 392 * All buffered packets, both transmitting and receiving, 393 * if any, will be lost by stopping the interface. 394 */ 395 void 396 mb86960_stop(sc) 397 struct mb86960_softc *sc; 398 { 399 bus_space_tag_t bst = sc->sc_bst; 400 bus_space_handle_t bsh = sc->sc_bsh; 401 402 #if FE_DEBUG >= 3 403 log(LOG_INFO, "%s: top of mb86960_stop()\n", sc->sc_dev.dv_xname); 404 mb86960_dump(LOG_INFO, sc); 405 #endif 406 407 /* Disable interrupts. */ 408 bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); 409 bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); 410 411 /* Stop interface hardware. */ 412 delay(200); 413 bus_space_write_1(bst, bsh, FE_DLCR6, 414 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 415 delay(200); 416 417 /* Clear all interrupt status. */ 418 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); 419 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); 420 421 /* Put the chip in stand-by mode. */ 422 delay(200); 423 bus_space_write_1(bst, bsh, FE_DLCR7, 424 sc->proto_dlcr7 | FE_D7_POWER_DOWN); 425 delay(200); 426 427 /* MAR loading can be delayed. */ 428 sc->filter_change = 0; 429 430 /* Call a hook. */ 431 if (sc->stop_card) 432 (*sc->stop_card)(sc); 433 434 #if DEBUG >= 3 435 log(LOG_INFO, "%s: end of mb86960_stop()\n", sc->sc_dev.dv_xname); 436 mb86960_dump(LOG_INFO, sc); 437 #endif 438 } 439 440 /* 441 * Device timeout/watchdog routine. Entered if the device neglects to 442 * generate an interrupt after a transmit has been started on it. 443 */ 444 void 445 mb86960_watchdog(ifp) 446 struct ifnet *ifp; 447 { 448 struct mb86960_softc *sc = ifp->if_softc; 449 450 log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); 451 #if FE_DEBUG >= 3 452 mb86960_dump(LOG_INFO, sc); 453 #endif 454 455 /* Record how many packets are lost by this accident. */ 456 sc->sc_ec.ec_if.if_oerrors += sc->txb_sched + sc->txb_count; 457 458 mb86960_reset(sc); 459 } 460 461 /* 462 * Drop (skip) a packet from receive buffer in 86960 memory. 463 */ 464 static __inline__ void 465 mb86960_droppacket(sc) 466 struct mb86960_softc *sc; 467 { 468 bus_space_tag_t bst = sc->sc_bst; 469 bus_space_handle_t bsh = sc->sc_bsh; 470 471 bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP); 472 } 473 474 /* 475 * Initialize device. 476 */ 477 void 478 mb86960_init(sc) 479 struct mb86960_softc *sc; 480 { 481 bus_space_tag_t bst = sc->sc_bst; 482 bus_space_handle_t bsh = sc->sc_bsh; 483 struct ifnet *ifp = &sc->sc_ec.ec_if; 484 int i; 485 486 #if FE_DEBUG >= 3 487 log(LOG_INFO, "%s: top of mb86960_init()\n", sc->sc_dev.dv_xname); 488 mb86960_dump(LOG_INFO, sc); 489 #endif 490 491 /* Reset transmitter flags. */ 492 ifp->if_flags &= ~IFF_OACTIVE; 493 ifp->if_timer = 0; 494 495 sc->txb_free = sc->txb_size; 496 sc->txb_count = 0; 497 sc->txb_sched = 0; 498 499 /* Do any card-specific initialization, if applicable. */ 500 if (sc->init_card) 501 (*sc->init_card)(sc); 502 503 #if FE_DEBUG >= 3 504 log(LOG_INFO, "%s: after init hook\n", sc->sc_dev.dv_xname); 505 mb86960_dump(LOG_INFO, sc); 506 #endif 507 508 /* 509 * Make sure to disable the chip, also. 510 * This may also help re-programming the chip after 511 * hot insertion of PCMCIAs. 512 */ 513 bus_space_write_1(bst, bsh, FE_DLCR6, 514 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 515 delay(200); 516 517 /* Power up the chip and select register bank for DLCRs. */ 518 bus_space_write_1(bst, bsh, FE_DLCR7, 519 sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP); 520 delay(200); 521 522 /* Feed the station address. */ 523 bus_space_write_region_1(bst, bsh, FE_DLCR8, 524 sc->sc_enaddr, ETHER_ADDR_LEN); 525 526 /* Select the BMPR bank for runtime register access. */ 527 bus_space_write_1(bst, bsh, FE_DLCR7, 528 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 529 530 /* Initialize registers. */ 531 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ 532 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ 533 bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); 534 bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); 535 bus_space_write_1(bst, bsh, FE_DLCR4, sc->proto_dlcr4); 536 bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5); 537 bus_space_write_1(bst, bsh, FE_BMPR10, 0x00); 538 bus_space_write_1(bst, bsh, FE_BMPR11, FE_B11_CTRL_SKIP); 539 bus_space_write_1(bst, bsh, FE_BMPR12, 0x00); 540 bus_space_write_1(bst, bsh, FE_BMPR13, sc->proto_bmpr13); 541 bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER); 542 bus_space_write_1(bst, bsh, FE_BMPR15, 0x00); 543 544 #if FE_DEBUG >= 3 545 log(LOG_INFO, "%s: just before enabling DLC\n", sc->sc_dev.dv_xname); 546 mb86960_dump(LOG_INFO, sc); 547 #endif 548 549 /* Enable interrupts. */ 550 bus_space_write_1(bst, bsh, FE_DLCR2, FE_TMASK); 551 bus_space_write_1(bst, bsh, FE_DLCR3, FE_RMASK); 552 553 /* Enable transmitter and receiver. */ 554 delay(200); 555 bus_space_write_1(bst, bsh, FE_DLCR6, 556 sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 557 delay(200); 558 559 #if FE_DEBUG >= 3 560 log(LOG_INFO, "%s: just after enabling DLC\n", sc->sc_dev.dv_xname); 561 mb86960_dump(LOG_INFO, sc); 562 #endif 563 564 /* 565 * Make sure to empty the receive buffer. 566 * 567 * This may be redundant, but *if* the receive buffer were full 568 * at this point, the driver would hang. I have experienced 569 * some strange hangups just after UP. I hope the following 570 * code solve the problem. 571 * 572 * I have changed the order of hardware initialization. 573 * I think the receive buffer cannot have any packets at this 574 * point in this version. The following code *must* be 575 * redundant now. FIXME. 576 */ 577 for (i = 0; i < FE_MAX_RECV_COUNT; i++) { 578 if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) 579 break; 580 mb86960_droppacket(sc); 581 } 582 #if FE_DEBUG >= 1 583 if (i >= FE_MAX_RECV_COUNT) 584 log(LOG_ERR, "%s: cannot empty receive buffer\n", 585 sc->sc_dev.dv_xname); 586 #endif 587 #if FE_DEBUG >= 3 588 if (i < FE_MAX_RECV_COUNT) 589 log(LOG_INFO, "%s: receive buffer emptied (%d)\n", 590 sc->sc_dev.dv_xname, i); 591 #endif 592 593 #if FE_DEBUG >= 3 594 log(LOG_INFO, "%s: after ERB loop\n", sc->sc_dev.dv_xname); 595 mb86960_dump(LOG_INFO, sc); 596 #endif 597 598 /* Do we need this here? */ 599 bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ 600 bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ 601 602 #if FE_DEBUG >= 3 603 log(LOG_INFO, "%s: after FIXME\n", sc->sc_dev.dv_xname); 604 mb86960_dump(LOG_INFO, sc); 605 #endif 606 607 /* Set 'running' flag. */ 608 ifp->if_flags |= IFF_RUNNING; 609 610 /* 611 * At this point, the interface is runnung properly, 612 * except that it receives *no* packets. we then call 613 * mb86960_setmode() to tell the chip what packets to be 614 * received, based on the if_flags and multicast group 615 * list. It completes the initialization process. 616 */ 617 mb86960_setmode(sc); 618 619 #if FE_DEBUG >= 3 620 log(LOG_INFO, "%s: after setmode\n", sc->sc_dev.dv_xname); 621 mb86960_dump(LOG_INFO, sc); 622 #endif 623 624 /* ...and attempt to start output. */ 625 mb86960_start(ifp); 626 627 #if FE_DEBUG >= 3 628 log(LOG_INFO, "%s: end of mb86960_init()\n", sc->sc_dev.dv_xname); 629 mb86960_dump(LOG_INFO, sc); 630 #endif 631 } 632 633 /* 634 * This routine actually starts the transmission on the interface 635 */ 636 static __inline__ void 637 mb86960_xmit(sc) 638 struct mb86960_softc *sc; 639 { 640 bus_space_tag_t bst = sc->sc_bst; 641 bus_space_handle_t bsh = sc->sc_bsh; 642 643 /* 644 * Set a timer just in case we never hear from the board again. 645 * We use longer timeout for multiple packet transmission. 646 * I'm not sure this timer value is appropriate. FIXME. 647 */ 648 sc->sc_ec.ec_if.if_timer = 1 + sc->txb_count; 649 650 /* Update txb variables. */ 651 sc->txb_sched = sc->txb_count; 652 sc->txb_count = 0; 653 sc->txb_free = sc->txb_size; 654 655 #if FE_DELAYED_PADDING 656 /* Omit the postponed padding process. */ 657 sc->txb_padding = 0; 658 #endif 659 660 /* Start transmitter, passing packets in TX buffer. */ 661 bus_space_write_1(bst, bsh, FE_BMPR10, sc->txb_sched | FE_B10_START); 662 } 663 664 /* 665 * Start output on interface. 666 * We make two assumptions here: 667 * 1) that the current priority is set to splnet _before_ this code 668 * is called *and* is returned to the appropriate priority after 669 * return 670 * 2) that the IFF_OACTIVE flag is checked before this code is called 671 * (i.e. that the output part of the interface is idle) 672 */ 673 void 674 mb86960_start(ifp) 675 struct ifnet *ifp; 676 { 677 struct mb86960_softc *sc = ifp->if_softc; 678 struct mbuf *m; 679 680 #if FE_DEBUG >= 1 681 /* Just a sanity check. */ 682 if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) { 683 /* 684 * Txb_count and txb_free co-works to manage the 685 * transmission buffer. Txb_count keeps track of the 686 * used potion of the buffer, while txb_free does unused 687 * potion. So, as long as the driver runs properly, 688 * txb_count is zero if and only if txb_free is same 689 * as txb_size (which represents whole buffer.) 690 */ 691 log(LOG_ERR, "%s: inconsistent txb variables (%d, %d)\n", 692 sc->sc_dev.dv_xname, sc->txb_count, sc->txb_free); 693 /* 694 * So, what should I do, then? 695 * 696 * We now know txb_count and txb_free contradicts. We 697 * cannot, however, tell which is wrong. More 698 * over, we cannot peek 86960 transmission buffer or 699 * reset the transmission buffer. (In fact, we can 700 * reset the entire interface. I don't want to do it.) 701 * 702 * If txb_count is incorrect, leaving it as is will cause 703 * sending of gabages after next interrupt. We have to 704 * avoid it. Hence, we reset the txb_count here. If 705 * txb_free was incorrect, resetting txb_count just loose 706 * some packets. We can live with it. 707 */ 708 sc->txb_count = 0; 709 } 710 #endif 711 712 #if FE_DEBUG >= 1 713 /* 714 * First, see if there are buffered packets and an idle 715 * transmitter - should never happen at this point. 716 */ 717 if ((sc->txb_count > 0) && (sc->txb_sched == 0)) { 718 log(LOG_ERR, "%s: transmitter idle with %d buffered packets\n", 719 sc->sc_dev.dv_xname, sc->txb_count); 720 mb86960_xmit(sc); 721 } 722 #endif 723 724 /* 725 * Stop accepting more transmission packets temporarily, when 726 * a filter change request is delayed. Updating the MARs on 727 * 86960 flushes the transmisstion buffer, so it is delayed 728 * until all buffered transmission packets have been sent 729 * out. 730 */ 731 if (sc->filter_change) { 732 /* 733 * Filter change requst is delayed only when the DLC is 734 * working. DLC soon raise an interrupt after finishing 735 * the work. 736 */ 737 goto indicate_active; 738 } 739 740 for (;;) { 741 /* 742 * See if there is room to put another packet in the buffer. 743 * We *could* do better job by peeking the send queue to 744 * know the length of the next packet. Current version just 745 * tests against the worst case (i.e., longest packet). FIXME. 746 * 747 * When adding the packet-peek feature, don't forget adding a 748 * test on txb_count against QUEUEING_MAX. 749 * There is a little chance the packet count exceeds 750 * the limit. Assume transmission buffer is 8KB (2x8KB 751 * configuration) and an application sends a bunch of small 752 * (i.e., minimum packet sized) packets rapidly. An 8KB 753 * buffer can hold 130 blocks of 62 bytes long... 754 */ 755 if (sc->txb_free < 756 (ETHER_MAX_LEN - ETHER_CRC_LEN) + FE_DATA_LEN_LEN) { 757 /* No room. */ 758 goto indicate_active; 759 } 760 761 #if FE_SINGLE_TRANSMISSION 762 if (sc->txb_count > 0) { 763 /* Just one packet per a transmission buffer. */ 764 goto indicate_active; 765 } 766 #endif 767 768 /* 769 * Get the next mbuf chain for a packet to send. 770 */ 771 IF_DEQUEUE(&ifp->if_snd, m); 772 if (m == 0) { 773 /* No more packets to send. */ 774 goto indicate_inactive; 775 } 776 777 #if NBPFILTER > 0 778 /* Tap off here if there is a BPF listener. */ 779 if (ifp->if_bpf) 780 bpf_mtap(ifp->if_bpf, m); 781 #endif 782 783 /* 784 * Copy the mbuf chain into the transmission buffer. 785 * txb_* variables are updated as necessary. 786 */ 787 mb86960_write_mbufs(sc, m); 788 789 m_freem(m); 790 791 /* Start transmitter if it's idle. */ 792 if (sc->txb_sched == 0) 793 mb86960_xmit(sc); 794 } 795 796 indicate_inactive: 797 /* 798 * We are using the !OACTIVE flag to indicate to 799 * the outside world that we can accept an 800 * additional packet rather than that the 801 * transmitter is _actually_ active. Indeed, the 802 * transmitter may be active, but if we haven't 803 * filled all the buffers with data then we still 804 * want to accept more. 805 */ 806 ifp->if_flags &= ~IFF_OACTIVE; 807 return; 808 809 indicate_active: 810 /* 811 * The transmitter is active, and there are no room for 812 * more outgoing packets in the transmission buffer. 813 */ 814 ifp->if_flags |= IFF_OACTIVE; 815 return; 816 } 817 818 /* 819 * Transmission interrupt handler 820 * The control flow of this function looks silly. FIXME. 821 */ 822 void 823 mb86960_tint(sc, tstat) 824 struct mb86960_softc *sc; 825 u_char tstat; 826 { 827 bus_space_tag_t bst = sc->sc_bst; 828 bus_space_handle_t bsh = sc->sc_bsh; 829 struct ifnet *ifp = &sc->sc_ec.ec_if; 830 int left; 831 int col; 832 833 /* 834 * Handle "excessive collision" interrupt. 835 */ 836 if (tstat & FE_D0_COLL16) { 837 /* 838 * Find how many packets (including this collided one) 839 * are left unsent in transmission buffer. 840 */ 841 left = bus_space_read_1(bst, bsh, FE_BMPR10); 842 843 #if FE_DEBUG >= 2 844 log(LOG_WARNING, "%s: excessive collision (%d/%d)\n", 845 sc->sc_dev.dv_xname, left, sc->txb_sched); 846 #endif 847 #if FE_DEBUG >= 3 848 mb86960_dump(LOG_INFO, sc); 849 #endif 850 851 /* 852 * Update statistics. 853 */ 854 ifp->if_collisions += 16; 855 ifp->if_oerrors++; 856 ifp->if_opackets += sc->txb_sched - left; 857 858 /* 859 * Collision statistics has been updated. 860 * Clear the collision flag on 86960 now to avoid confusion. 861 */ 862 bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); 863 864 /* 865 * Restart transmitter, skipping the 866 * collided packet. 867 * 868 * We *must* skip the packet to keep network running 869 * properly. Excessive collision error is an 870 * indication of the network overload. If we 871 * tried sending the same packet after excessive 872 * collision, the network would be filled with 873 * out-of-time packets. Packets belonging 874 * to reliable transport (such as TCP) are resent 875 * by some upper layer. 876 */ 877 bus_space_write_1(bst, bsh, FE_BMPR11, 878 FE_B11_CTRL_SKIP | FE_B11_MODE1); 879 sc->txb_sched = left - 1; 880 } 881 882 /* 883 * Handle "transmission complete" interrupt. 884 */ 885 if (tstat & FE_D0_TXDONE) { 886 /* 887 * Add in total number of collisions on last 888 * transmission. We also clear "collision occurred" flag 889 * here. 890 * 891 * 86960 has a design flow on collision count on multiple 892 * packet transmission. When we send two or more packets 893 * with one start command (that's what we do when the 894 * transmission queue is clauded), 86960 informs us number 895 * of collisions occured on the last packet on the 896 * transmission only. Number of collisions on previous 897 * packets are lost. I have told that the fact is clearly 898 * stated in the Fujitsu document. 899 * 900 * I considered not to mind it seriously. Collision 901 * count is not so important, anyway. Any comments? FIXME. 902 */ 903 904 if (bus_space_read_1(bst, bsh, FE_DLCR0) & FE_D0_COLLID) { 905 /* Clear collision flag. */ 906 bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); 907 908 /* Extract collision count from 86960. */ 909 col = bus_space_read_1(bst, bsh, FE_DLCR4) & FE_D4_COL; 910 if (col == 0) { 911 /* 912 * Status register indicates collisions, 913 * while the collision count is zero. 914 * This can happen after multiple packet 915 * transmission, indicating that one or more 916 * previous packet(s) had been collided. 917 * 918 * Since the accurate number of collisions 919 * has been lost, we just guess it as 1; 920 * Am I too optimistic? FIXME. 921 */ 922 col = 1; 923 } else 924 col >>= FE_D4_COL_SHIFT; 925 ifp->if_collisions += col; 926 #if FE_DEBUG >= 4 927 log(LOG_WARNING, "%s: %d collision%s (%d)\n", 928 sc->sc_dev.dv_xname, col, col == 1 ? "" : "s", 929 sc->txb_sched); 930 #endif 931 } 932 933 /* 934 * Update total number of successfully 935 * transmitted packets. 936 */ 937 ifp->if_opackets += sc->txb_sched; 938 sc->txb_sched = 0; 939 } 940 941 if (sc->txb_sched == 0) { 942 /* 943 * The transmitter is no more active. 944 * Reset output active flag and watchdog timer. 945 */ 946 ifp->if_flags &= ~IFF_OACTIVE; 947 ifp->if_timer = 0; 948 949 /* 950 * If more data is ready to transmit in the buffer, start 951 * transmitting them. Otherwise keep transmitter idle, 952 * even if more data is queued. This gives receive 953 * process a slight priority. 954 */ 955 if (sc->txb_count > 0) 956 mb86960_xmit(sc); 957 } 958 } 959 960 /* 961 * Ethernet interface receiver interrupt. 962 */ 963 void 964 mb86960_rint(sc, rstat) 965 struct mb86960_softc *sc; 966 u_char rstat; 967 { 968 bus_space_tag_t bst = sc->sc_bst; 969 bus_space_handle_t bsh = sc->sc_bsh; 970 struct ifnet *ifp = &sc->sc_ec.ec_if; 971 int len; 972 u_char status; 973 int i; 974 975 /* 976 * Update statistics if this interrupt is caused by an error. 977 */ 978 if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | 979 FE_D1_SRTPKT)) { 980 #if FE_DEBUG >= 3 981 log(LOG_WARNING, "%s: receive error: %b\n", 982 sc->sc_dev.dv_xname, rstat, FE_D1_ERRBITS); 983 #endif 984 ifp->if_ierrors++; 985 } 986 987 /* 988 * MB86960 has a flag indicating "receive queue empty." 989 * We just loop cheking the flag to pull out all received 990 * packets. 991 * 992 * We limit the number of iterrations to avoid infinite loop. 993 * It can be caused by a very slow CPU (some broken 994 * peripheral may insert incredible number of wait cycles) 995 * or, worse, by a broken MB86960 chip. 996 */ 997 for (i = 0; i < FE_MAX_RECV_COUNT; i++) { 998 /* Stop the iterration if 86960 indicates no packets. */ 999 if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) 1000 break; 1001 1002 /* 1003 * Extract A receive status byte. 1004 * As our 86960 is in 16 bit bus access mode, we have to 1005 * use inw() to get the status byte. The significant 1006 * value is returned in lower 8 bits. 1007 */ 1008 status = (u_char)bus_space_read_2(bst, bsh, FE_BMPR8); 1009 #if FE_DEBUG >= 4 1010 log(LOG_INFO, "%s: receive status = %02x\n", 1011 sc->sc_dev.dv_xname, status); 1012 #endif 1013 1014 /* 1015 * If there was an error, update statistics and drop 1016 * the packet, unless the interface is in promiscuous 1017 * mode. 1018 */ 1019 if ((status & 0xF0) != 0x20) { /* XXXX ? */ 1020 if ((ifp->if_flags & IFF_PROMISC) == 0) { 1021 ifp->if_ierrors++; 1022 mb86960_droppacket(sc); 1023 continue; 1024 } 1025 } 1026 1027 /* 1028 * Extract the packet length. 1029 * It is a sum of a header (14 bytes) and a payload. 1030 * CRC has been stripped off by the 86960. 1031 */ 1032 len = bus_space_read_2(bst, bsh, FE_BMPR8); 1033 1034 /* 1035 * MB86965 checks the packet length and drop big packet 1036 * before passing it to us. There are no chance we can 1037 * get [crufty] packets. Hence, if the length exceeds 1038 * the specified limit, it means some serious failure, 1039 * such as out-of-sync on receive buffer management. 1040 * 1041 * Is this statement true? FIXME. 1042 */ 1043 if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN) || 1044 len < ETHER_HDR_LEN) { 1045 #if FE_DEBUG >= 2 1046 log(LOG_WARNING, 1047 "%s: received a %s packet? (%u bytes)\n", 1048 sc->sc_dev.dv_xname, 1049 len < ETHER_HDR_LEN ? "partial" : "big", len); 1050 #endif 1051 ifp->if_ierrors++; 1052 mb86960_droppacket(sc); 1053 continue; 1054 } 1055 1056 /* 1057 * Check for a short (RUNT) packet. We *do* check 1058 * but do nothing other than print a message. 1059 * Short packets are illegal, but does nothing bad 1060 * if it carries data for upper layer. 1061 */ 1062 #if FE_DEBUG >= 2 1063 if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { 1064 log(LOG_WARNING, 1065 "%s: received a short packet? (%u bytes)\n", 1066 sc->sc_dev.dv_xname, len); 1067 } 1068 #endif 1069 1070 /* 1071 * Go get a packet. 1072 */ 1073 if (!mb86960_get_packet(sc, len)) { 1074 /* Skip a packet, updating statistics. */ 1075 #if FE_DEBUG >= 2 1076 log(LOG_WARNING, 1077 "%s: out of mbufs; dropping packet (%u bytes)\n", 1078 sc->sc_dev.dv_xname, len); 1079 #endif 1080 ifp->if_ierrors++; 1081 mb86960_droppacket(sc); 1082 1083 /* 1084 * We stop receiving packets, even if there are 1085 * more in the buffer. We hope we can get more 1086 * mbufs next time. 1087 */ 1088 return; 1089 } 1090 1091 /* Successfully received a packet. Update stat. */ 1092 ifp->if_ipackets++; 1093 } 1094 } 1095 1096 /* 1097 * Ethernet interface interrupt processor 1098 */ 1099 int 1100 mb86960_intr(arg) 1101 void *arg; 1102 { 1103 struct mb86960_softc *sc = arg; 1104 bus_space_tag_t bst = sc->sc_bst; 1105 bus_space_handle_t bsh = sc->sc_bsh; 1106 struct ifnet *ifp = &sc->sc_ec.ec_if; 1107 u_char tstat, rstat; 1108 1109 if (sc->sc_enabled == 0) 1110 return (0); 1111 1112 #if FE_DEBUG >= 4 1113 log(LOG_INFO, "%s: mb86960_intr()\n", sc->sc_dev.dv_xname); 1114 mb86960_dump(LOG_INFO, sc); 1115 #endif 1116 1117 /* 1118 * Get interrupt conditions, masking unneeded flags. 1119 */ 1120 tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; 1121 rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; 1122 if (tstat == 0 && rstat == 0) 1123 return (0); 1124 1125 /* 1126 * Loop until there are no more new interrupt conditions. 1127 */ 1128 for (;;) { 1129 /* 1130 * Reset the conditions we are acknowledging. 1131 */ 1132 bus_space_write_1(bst, bsh, FE_DLCR0, tstat); 1133 bus_space_write_1(bst, bsh, FE_DLCR1, rstat); 1134 1135 /* 1136 * Handle transmitter interrupts. Handle these first because 1137 * the receiver will reset the board under some conditions. 1138 */ 1139 if (tstat != 0) 1140 mb86960_tint(sc, tstat); 1141 1142 /* 1143 * Handle receiver interrupts. 1144 */ 1145 if (rstat != 0) 1146 mb86960_rint(sc, rstat); 1147 1148 /* 1149 * Update the multicast address filter if it is 1150 * needed and possible. We do it now, because 1151 * we can make sure the transmission buffer is empty, 1152 * and there is a good chance that the receive queue 1153 * is empty. It will minimize the possibility of 1154 * packet lossage. 1155 */ 1156 if (sc->filter_change && 1157 sc->txb_count == 0 && sc->txb_sched == 0) { 1158 mb86960_loadmar(sc); 1159 ifp->if_flags &= ~IFF_OACTIVE; 1160 } 1161 1162 /* 1163 * If it looks like the transmitter can take more data, 1164 * attempt to start output on the interface. This is done 1165 * after handling the receiver interrupt to give the 1166 * receive operation priority. 1167 */ 1168 if ((ifp->if_flags & IFF_OACTIVE) == 0) 1169 mb86960_start(ifp); 1170 1171 #if NRND > 0 1172 if (rstat != 0 || tstat != 0) 1173 rnd_add_uint32(&sc->rnd_source, rstat + tstat); 1174 #endif 1175 1176 /* 1177 * Get interrupt conditions, masking unneeded flags. 1178 */ 1179 tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; 1180 rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; 1181 if (tstat == 0 && rstat == 0) 1182 return (1); 1183 } 1184 } 1185 1186 /* 1187 * Process an ioctl request. This code needs some work - it looks pretty ugly. 1188 */ 1189 int 1190 mb86960_ioctl(ifp, cmd, data) 1191 struct ifnet *ifp; 1192 u_long cmd; 1193 caddr_t data; 1194 { 1195 struct mb86960_softc *sc = ifp->if_softc; 1196 struct ifaddr *ifa = (struct ifaddr *)data; 1197 struct ifreq *ifr = (struct ifreq *)data; 1198 int s, error = 0; 1199 1200 #if FE_DEBUG >= 3 1201 log(LOG_INFO, "%s: ioctl(%lx)\n", sc->sc_dev.dv_xname, cmd); 1202 #endif 1203 1204 s = splnet(); 1205 1206 switch (cmd) { 1207 case SIOCSIFADDR: 1208 if ((error = mb86960_enable(sc)) != 0) 1209 break; 1210 ifp->if_flags |= IFF_UP; 1211 1212 switch (ifa->ifa_addr->sa_family) { 1213 #ifdef INET 1214 case AF_INET: 1215 mb86960_init(sc); 1216 arp_ifinit(ifp, ifa); 1217 break; 1218 #endif 1219 #ifdef NS 1220 case AF_NS: 1221 { 1222 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1223 1224 if (ns_nullhost(*ina)) 1225 ina->x_host = 1226 *(union ns_host *)LLADDR(ifp->if_sadl); 1227 else { 1228 bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl), 1229 ETHER_ADDR_LEN); 1230 } 1231 /* Set new address. */ 1232 mb86960_init(sc); 1233 break; 1234 } 1235 #endif 1236 default: 1237 mb86960_init(sc); 1238 break; 1239 } 1240 break; 1241 1242 case SIOCSIFFLAGS: 1243 if ((ifp->if_flags & IFF_UP) == 0 && 1244 (ifp->if_flags & IFF_RUNNING) != 0) { 1245 /* 1246 * If interface is marked down and it is running, then 1247 * stop it. 1248 */ 1249 mb86960_stop(sc); 1250 ifp->if_flags &= ~IFF_RUNNING; 1251 mb86960_disable(sc); 1252 } else if ((ifp->if_flags & IFF_UP) != 0 && 1253 (ifp->if_flags & IFF_RUNNING) == 0) { 1254 /* 1255 * If interface is marked up and it is stopped, then 1256 * start it. 1257 */ 1258 if ((error = mb86960_enable(sc)) != 0) 1259 break; 1260 mb86960_init(sc); 1261 } else if ((ifp->if_flags & IFF_UP) != 0) { 1262 /* 1263 * Reset the interface to pick up changes in any other 1264 * flags that affect hardware registers. 1265 */ 1266 mb86960_setmode(sc); 1267 } 1268 #if DEBUG >= 1 1269 /* "ifconfig fe0 debug" to print register dump. */ 1270 if (ifp->if_flags & IFF_DEBUG) { 1271 log(LOG_INFO, "%s: SIOCSIFFLAGS(DEBUG)\n", 1272 sc->sc_dev.dv_xname); 1273 mb86960_dump(LOG_DEBUG, sc); 1274 } 1275 #endif 1276 break; 1277 1278 case SIOCADDMULTI: 1279 case SIOCDELMULTI: 1280 if (sc->sc_enabled == 0) { 1281 error = EIO; 1282 break; 1283 } 1284 1285 /* Update our multicast list. */ 1286 error = (cmd == SIOCADDMULTI) ? 1287 ether_addmulti(ifr, &sc->sc_ec) : 1288 ether_delmulti(ifr, &sc->sc_ec); 1289 1290 if (error == ENETRESET) { 1291 /* 1292 * Multicast list has changed; set the hardware filter 1293 * accordingly. 1294 */ 1295 mb86960_setmode(sc); 1296 error = 0; 1297 } 1298 break; 1299 1300 case SIOCGIFMEDIA: 1301 case SIOCSIFMEDIA: 1302 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); 1303 break; 1304 1305 default: 1306 error = EINVAL; 1307 break; 1308 } 1309 1310 splx(s); 1311 return (error); 1312 } 1313 1314 /* 1315 * Retreive packet from receive buffer and send to the next level up via 1316 * ether_input(). If there is a BPF listener, give a copy to BPF, too. 1317 * Returns 0 if success, -1 if error (i.e., mbuf allocation failure). 1318 */ 1319 int 1320 mb86960_get_packet(sc, len) 1321 struct mb86960_softc *sc; 1322 int len; 1323 { 1324 bus_space_tag_t bst = sc->sc_bst; 1325 bus_space_handle_t bsh = sc->sc_bsh; 1326 struct ifnet *ifp = &sc->sc_ec.ec_if; 1327 struct ether_header *eh; 1328 struct mbuf *m; 1329 1330 /* Allocate a header mbuf. */ 1331 MGETHDR(m, M_DONTWAIT, MT_DATA); 1332 if (m == 0) 1333 return (0); 1334 m->m_pkthdr.rcvif = ifp; 1335 m->m_pkthdr.len = len; 1336 1337 /* The following silliness is to make NFS happy. */ 1338 #define EROUND ((sizeof(struct ether_header) + 3) & ~3) 1339 #define EOFF (EROUND - sizeof(struct ether_header)) 1340 1341 /* 1342 * Our strategy has one more problem. There is a policy on 1343 * mbuf cluster allocation. It says that we must have at 1344 * least MINCLSIZE (208 bytes) to allocate a cluster. For a 1345 * packet of a size between (MHLEN - 2) to (MINCLSIZE - 2), 1346 * our code violates the rule... 1347 * On the other hand, the current code is short, simle, 1348 * and fast, however. It does no harmful thing, just waists 1349 * some memory. Any comments? FIXME. 1350 */ 1351 1352 /* Attach a cluster if this packet doesn't fit in a normal mbuf. */ 1353 if (len > MHLEN - EOFF) { 1354 MCLGET(m, M_DONTWAIT); 1355 if ((m->m_flags & M_EXT) == 0) { 1356 m_freem(m); 1357 return (0); 1358 } 1359 } 1360 1361 /* 1362 * The following assumes there is room for the ether header in the 1363 * header mbuf. 1364 */ 1365 m->m_data += EOFF; 1366 eh = mtod(m, struct ether_header *); 1367 1368 /* Set the length of this packet. */ 1369 m->m_len = len; 1370 1371 /* Get a packet. */ 1372 bus_space_read_multi_stream_2(bst, bsh, FE_BMPR8, mtod(m, u_int16_t *), 1373 (len + 1) >> 1); 1374 1375 #if NBPFILTER > 0 1376 /* 1377 * Check if there's a BPF listener on this interface. If so, hand off 1378 * the raw packet to bpf. 1379 */ 1380 if (ifp->if_bpf) { 1381 bpf_mtap(ifp->if_bpf, m); 1382 1383 /* 1384 * Note that the interface cannot be in promiscuous mode if 1385 * there are no BPF listeners. And if we are in promiscuous 1386 * mode, we have to check if this packet is really ours. 1387 */ 1388 if ((ifp->if_flags & IFF_PROMISC) != 0 && 1389 (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ 1390 bcmp(eh->ether_dhost, sc->sc_enaddr, 1391 sizeof(eh->ether_dhost)) != 0) { 1392 m_freem(m); 1393 return (1); 1394 } 1395 } 1396 #endif 1397 1398 (*ifp->if_input)(ifp, m); 1399 return (1); 1400 } 1401 1402 /* 1403 * Write an mbuf chain to the transmission buffer memory using 16 bit PIO. 1404 * Returns number of bytes actually written, including length word. 1405 * 1406 * If an mbuf chain is too long for an Ethernet frame, it is not sent. 1407 * Packets shorter than Ethernet minimum are legal, and we pad them 1408 * before sending out. An exception is "partial" packets which are 1409 * shorter than mandatory Ethernet header. 1410 * 1411 * I wrote a code for an experimental "delayed padding" technique. 1412 * When employed, it postpones the padding process for short packets. 1413 * If xmit() occured at the moment, the padding process is omitted, and 1414 * garbages are sent as pad data. If next packet is stored in the 1415 * transmission buffer before xmit(), write_mbuf() pads the previous 1416 * packet before transmitting new packet. This *may* gain the 1417 * system performance (slightly). 1418 */ 1419 void 1420 mb86960_write_mbufs(sc, m) 1421 struct mb86960_softc *sc; 1422 struct mbuf *m; 1423 { 1424 bus_space_tag_t bst = sc->sc_bst; 1425 bus_space_handle_t bsh = sc->sc_bsh; 1426 u_char *data; 1427 u_short savebyte; /* WARNING: Architecture dependent! */ 1428 int totlen, len, wantbyte; 1429 #if FE_DEBUG >= 2 1430 struct mbuf *mp; 1431 #endif 1432 1433 /* XXX thorpej 960116 - quiet bogus compiler warning. */ 1434 savebyte = 0; 1435 1436 #if FE_DELAYED_PADDING 1437 /* Do the "delayed padding." */ 1438 len = sc->txb_padding >> 1; 1439 if (len > 0) { 1440 while (--len >= 0) 1441 bus_space_write_2(bst, bsh, FE_BMPR8, 0); 1442 sc->txb_padding = 0; 1443 } 1444 #endif 1445 1446 /* We need to use m->m_pkthdr.len, so require the header */ 1447 if ((m->m_flags & M_PKTHDR) == 0) 1448 panic("mb86960_write_mbufs: no header mbuf"); 1449 1450 #if FE_DEBUG >= 2 1451 /* First, count up the total number of bytes to copy. */ 1452 for (totlen = 0, mp = m; mp != 0; mp = mp->m_next) 1453 totlen += mp->m_len; 1454 /* Check if this matches the one in the packet header. */ 1455 if (totlen != m->m_pkthdr.len) 1456 log(LOG_WARNING, "%s: packet length mismatch? (%d/%d)\n", 1457 sc->sc_dev.dv_xname, totlen, m->m_pkthdr.len); 1458 #else 1459 /* Just use the length value in the packet header. */ 1460 totlen = m->m_pkthdr.len; 1461 #endif 1462 1463 #if FE_DEBUG >= 1 1464 /* 1465 * Should never send big packets. If such a packet is passed, 1466 * it should be a bug of upper layer. We just ignore it. 1467 * ... Partial (too short) packets, neither. 1468 */ 1469 if (totlen > (ETHER_MAX_LEN - ETHER_CRC_LEN) || 1470 totlen < ETHER_HDR_LEN) { 1471 log(LOG_ERR, "%s: got a %s packet (%u bytes) to send\n", 1472 sc->sc_dev.dv_xname, 1473 totlen < ETHER_HDR_LEN ? "partial" : "big", totlen); 1474 sc->sc_ec.ec_if.if_oerrors++; 1475 return; 1476 } 1477 #endif 1478 1479 /* 1480 * Put the length word for this frame. 1481 * Does 86960 accept odd length? -- Yes. 1482 * Do we need to pad the length to minimum size by ourselves? 1483 * -- Generally yes. But for (or will be) the last 1484 * packet in the transmission buffer, we can skip the 1485 * padding process. It may gain performance slightly. FIXME. 1486 */ 1487 bus_space_write_2(bst, bsh, FE_BMPR8, 1488 max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN))); 1489 1490 /* 1491 * Update buffer status now. 1492 * Truncate the length up to an even number, since we use outw(). 1493 */ 1494 totlen = (totlen + 1) & ~1; 1495 sc->txb_free -= FE_DATA_LEN_LEN + 1496 max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); 1497 sc->txb_count++; 1498 1499 #if FE_DELAYED_PADDING 1500 /* Postpone the packet padding if necessary. */ 1501 if (totlen < (ETHER_MIN_LEN - ETHER_CRC_LEN)) 1502 sc->txb_padding = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; 1503 #endif 1504 1505 /* 1506 * Transfer the data from mbuf chain to the transmission buffer. 1507 * MB86960 seems to require that data be transferred as words, and 1508 * only words. So that we require some extra code to patch 1509 * over odd-length mbufs. 1510 */ 1511 wantbyte = 0; 1512 for (; m != 0; m = m->m_next) { 1513 /* Ignore empty mbuf. */ 1514 len = m->m_len; 1515 if (len == 0) 1516 continue; 1517 1518 /* Find the actual data to send. */ 1519 data = mtod(m, caddr_t); 1520 1521 /* Finish the last byte. */ 1522 if (wantbyte) { 1523 bus_space_write_2(bst, bsh, FE_BMPR8, 1524 savebyte | (*data << 8)); 1525 data++; 1526 len--; 1527 wantbyte = 0; 1528 } 1529 1530 /* Output contiguous words. */ 1531 if (len > 1) 1532 bus_space_write_multi_stream_2(bst, bsh, FE_BMPR8, 1533 (u_int16_t *)data, len >> 1); 1534 1535 /* Save remaining byte, if there is one. */ 1536 if (len & 1) { 1537 data += len & ~1; 1538 savebyte = *data; 1539 wantbyte = 1; 1540 } 1541 } 1542 1543 /* Spit the last byte, if the length is odd. */ 1544 if (wantbyte) 1545 bus_space_write_2(bst, bsh, FE_BMPR8, savebyte); 1546 1547 #if ! FE_DELAYED_PADDING 1548 /* 1549 * Pad the packet to the minimum length if necessary. 1550 */ 1551 len = ((ETHER_MIN_LEN - ETHER_CRC_LEN) >> 1) - (totlen >> 1); 1552 while (--len >= 0) 1553 bus_space_write_2(bst, bsh, FE_BMPR8, 0); 1554 #endif 1555 } 1556 1557 /* 1558 * Compute the multicast address filter from the 1559 * list of multicast addresses we need to listen to. 1560 */ 1561 void 1562 mb86960_getmcaf(ec, af) 1563 struct ethercom *ec; 1564 u_char *af; 1565 { 1566 struct ifnet *ifp = &ec->ec_if; 1567 struct ether_multi *enm; 1568 register u_char *cp; 1569 register u_int32_t crc; 1570 static const u_int32_t crctab[] = { 1571 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1572 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1573 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1574 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1575 }; 1576 register int len; 1577 struct ether_multistep step; 1578 1579 /* 1580 * Set up multicast address filter by passing all multicast addresses 1581 * through a crc generator, and then using the high order 6 bits as an 1582 * index into the 64 bit logical address filter. The high order bit 1583 * selects the word, while the rest of the bits select the bit within 1584 * the word. 1585 */ 1586 1587 if ((ifp->if_flags & IFF_PROMISC) != 0) 1588 goto allmulti; 1589 1590 af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0x00; 1591 ETHER_FIRST_MULTI(step, ec, enm); 1592 while (enm != NULL) { 1593 if (bcmp(enm->enm_addrlo, enm->enm_addrhi, 1594 sizeof(enm->enm_addrlo)) != 0) { 1595 /* 1596 * We must listen to a range of multicast addresses. 1597 * For now, just accept all multicasts, rather than 1598 * trying to set only those filter bits needed to match 1599 * the range. (At this time, the only use of address 1600 * ranges is for IP multicast routing, for which the 1601 * range is big enough to require all bits set.) 1602 */ 1603 goto allmulti; 1604 } 1605 1606 cp = enm->enm_addrlo; 1607 crc = 0xffffffff; 1608 for (len = sizeof(enm->enm_addrlo); --len >= 0;) { 1609 crc ^= *cp++; 1610 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1611 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1612 } 1613 /* Just want the 6 most significant bits. */ 1614 crc >>= 26; 1615 1616 /* Turn on the corresponding bit in the filter. */ 1617 af[crc >> 3] |= 1 << (crc & 7); 1618 1619 ETHER_NEXT_MULTI(step, enm); 1620 } 1621 ifp->if_flags &= ~IFF_ALLMULTI; 1622 return; 1623 1624 allmulti: 1625 ifp->if_flags |= IFF_ALLMULTI; 1626 af[0] = af[1] = af[2] = af[3] = af[4] = af[5] = af[6] = af[7] = 0xff; 1627 } 1628 1629 /* 1630 * Calculate a new "multicast packet filter" and put the 86960 1631 * receiver in appropriate mode. 1632 */ 1633 void 1634 mb86960_setmode(sc) 1635 struct mb86960_softc *sc; 1636 { 1637 bus_space_tag_t bst = sc->sc_bst; 1638 bus_space_handle_t bsh = sc->sc_bsh; 1639 int flags = sc->sc_ec.ec_if.if_flags; 1640 1641 /* 1642 * If the interface is not running, we postpone the update 1643 * process for receive modes and multicast address filter 1644 * until the interface is restarted. It reduces some 1645 * complicated job on maintaining chip states. (Earlier versions 1646 * of this driver had a bug on that point...) 1647 * 1648 * To complete the trick, mb86960_init() calls mb86960_setmode() after 1649 * restarting the interface. 1650 */ 1651 if ((flags & IFF_RUNNING) == 0) 1652 return; 1653 1654 /* 1655 * Promiscuous mode is handled separately. 1656 */ 1657 if ((flags & IFF_PROMISC) != 0) { 1658 /* 1659 * Program 86960 to receive all packets on the segment 1660 * including those directed to other stations. 1661 * Multicast filter stored in MARs are ignored 1662 * under this setting, so we don't need to update it. 1663 * 1664 * Promiscuous mode is used solely by BPF, and BPF only 1665 * listens to valid (no error) packets. So, we ignore 1666 * errornous ones even in this mode. 1667 */ 1668 bus_space_write_1(bst, bsh, FE_DLCR5, 1669 sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1); 1670 sc->filter_change = 0; 1671 1672 #if FE_DEBUG >= 3 1673 log(LOG_INFO, "%s: promiscuous mode\n", sc->sc_dev.dv_xname); 1674 #endif 1675 return; 1676 } 1677 1678 /* 1679 * Turn the chip to the normal (non-promiscuous) mode. 1680 */ 1681 bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1); 1682 1683 /* 1684 * Find the new multicast filter value. 1685 */ 1686 mb86960_getmcaf(&sc->sc_ec, sc->filter); 1687 sc->filter_change = 1; 1688 1689 #if FE_DEBUG >= 3 1690 log(LOG_INFO, 1691 "%s: address filter: [%02x %02x %02x %02x %02x %02x %02x %02x]\n", 1692 sc->sc_dev.dv_xname, 1693 sc->filter[0], sc->filter[1], sc->filter[2], sc->filter[3], 1694 sc->filter[4], sc->filter[5], sc->filter[6], sc->filter[7]); 1695 #endif 1696 1697 /* 1698 * We have to update the multicast filter in the 86960, A.S.A.P. 1699 * 1700 * Note that the DLC (Data Linc Control unit, i.e. transmitter 1701 * and receiver) must be stopped when feeding the filter, and 1702 * DLC trushes all packets in both transmission and receive 1703 * buffers when stopped. 1704 * 1705 * ... Are the above sentenses correct? I have to check the 1706 * manual of the MB86960A. FIXME. 1707 * 1708 * To reduce the packet lossage, we delay the filter update 1709 * process until buffers are empty. 1710 */ 1711 if (sc->txb_sched == 0 && sc->txb_count == 0 && 1712 (bus_space_read_1(bst, bsh, FE_DLCR1) & FE_D1_PKTRDY) == 0) { 1713 /* 1714 * Buffers are (apparently) empty. Load 1715 * the new filter value into MARs now. 1716 */ 1717 mb86960_loadmar(sc); 1718 } else { 1719 /* 1720 * Buffers are not empty. Mark that we have to update 1721 * the MARs. The new filter will be loaded by mb86960_intr() 1722 * later. 1723 */ 1724 #if FE_DEBUG >= 4 1725 log(LOG_INFO, "%s: filter change delayed\n", 1726 sc->sc_dev.dv_xname); 1727 #endif 1728 } 1729 } 1730 1731 /* 1732 * Load a new multicast address filter into MARs. 1733 * 1734 * The caller must have splnet'ed befor mb86960_loadmar. 1735 * This function starts the DLC upon return. So it can be called only 1736 * when the chip is working, i.e., from the driver's point of view, when 1737 * a device is RUNNING. (I mistook the point in previous versions.) 1738 */ 1739 void 1740 mb86960_loadmar(sc) 1741 struct mb86960_softc *sc; 1742 { 1743 bus_space_tag_t bst = sc->sc_bst; 1744 bus_space_handle_t bsh = sc->sc_bsh; 1745 1746 /* Stop the DLC (transmitter and receiver). */ 1747 bus_space_write_1(bst, bsh, FE_DLCR6, 1748 sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 1749 1750 /* Select register bank 1 for MARs. */ 1751 bus_space_write_1(bst, bsh, FE_DLCR7, 1752 sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); 1753 1754 /* Copy filter value into the registers. */ 1755 bus_space_write_region_1(bst, bsh, FE_MAR8, sc->filter, FE_FILTER_LEN); 1756 1757 /* Restore the bank selection for BMPRs (i.e., runtime registers). */ 1758 bus_space_write_1(bst, bsh, FE_DLCR7, 1759 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 1760 1761 /* Restart the DLC. */ 1762 bus_space_write_1(bst, bsh, FE_DLCR6, 1763 sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 1764 1765 /* We have just updated the filter. */ 1766 sc->filter_change = 0; 1767 1768 #if FE_DEBUG >= 3 1769 log(LOG_INFO, "%s: address filter changed\n", sc->sc_dev.dv_xname); 1770 #endif 1771 } 1772 1773 /* 1774 * Enable power on the interface. 1775 */ 1776 int 1777 mb86960_enable(sc) 1778 struct mb86960_softc *sc; 1779 { 1780 1781 #if FE_DEBUG >= 3 1782 log(LOG_INFO, "%s: mb86960_enable()\n", sc->sc_dev.dv_xname); 1783 #endif 1784 1785 if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { 1786 if ((*sc->sc_enable)(sc) != 0) { 1787 printf("%s: device enable failed\n", 1788 sc->sc_dev.dv_xname); 1789 return (EIO); 1790 } 1791 } 1792 1793 sc->sc_enabled = 1; 1794 return (0); 1795 } 1796 1797 /* 1798 * Disable power on the interface. 1799 */ 1800 void 1801 mb86960_disable(sc) 1802 struct mb86960_softc *sc; 1803 { 1804 1805 #if FE_DEBUG >= 3 1806 log(LOG_INFO, "%s: mb86960_disable()\n", sc->sc_dev.dv_xname); 1807 #endif 1808 1809 if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { 1810 (*sc->sc_disable)(sc); 1811 sc->sc_enabled = 0; 1812 } 1813 } 1814 1815 int 1816 mb86960_activate(self, act) 1817 struct device *self; 1818 enum devact act; 1819 { 1820 struct mb86960_softc *sc = (struct mb86960_softc *)self; 1821 int rv = 0, s; 1822 1823 s = splnet(); 1824 switch (act) { 1825 case DVACT_ACTIVATE: 1826 rv = EOPNOTSUPP; 1827 break; 1828 1829 case DVACT_DEACTIVATE: 1830 #ifdef notyet 1831 /* First, kill off the interface. */ 1832 if_detach(sc->sc_ec.ec_if); 1833 #endif 1834 1835 /* Now disable the interface. */ 1836 mb86960_disable(sc); 1837 break; 1838 } 1839 splx(s); 1840 return (rv); 1841 } 1842 1843 #if FE_DEBUG >= 1 1844 void 1845 mb86960_dump(level, sc) 1846 int level; 1847 struct mb86960_softc *sc; 1848 { 1849 bus_space_tag_t bst = sc->sc_bst; 1850 bus_space_handle_t bsh = sc->sc_bsh; 1851 u_char save_dlcr7; 1852 1853 save_dlcr7 = bus_space_read_1(bst, bsh, FE_DLCR7); 1854 1855 log(level, "\tDLCR = %02x %02x %02x %02x %02x %02x %02x %02x\n", 1856 bus_space_read_1(bst, bsh, FE_DLCR0), 1857 bus_space_read_1(bst, bsh, FE_DLCR1), 1858 bus_space_read_1(bst, bsh, FE_DLCR2), 1859 bus_space_read_1(bst, bsh, FE_DLCR3), 1860 bus_space_read_1(bst, bsh, FE_DLCR4), 1861 bus_space_read_1(bst, bsh, FE_DLCR5), 1862 bus_space_read_1(bst, bsh, FE_DLCR6), 1863 bus_space_read_1(bst, bsh, FE_DLCR7)); 1864 1865 bus_space_write_1(bst, bsh, FE_DLCR7, 1866 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_DLCR); 1867 log(level, "\t %02x %02x %02x %02x %02x %02x %02x %02x\n", 1868 bus_space_read_1(bst, bsh, FE_DLCR8), 1869 bus_space_read_1(bst, bsh, FE_DLCR9), 1870 bus_space_read_1(bst, bsh, FE_DLCR10), 1871 bus_space_read_1(bst, bsh, FE_DLCR11), 1872 bus_space_read_1(bst, bsh, FE_DLCR12), 1873 bus_space_read_1(bst, bsh, FE_DLCR13), 1874 bus_space_read_1(bst, bsh, FE_DLCR14), 1875 bus_space_read_1(bst, bsh, FE_DLCR15)); 1876 1877 bus_space_write_1(bst, bsh, FE_DLCR7, 1878 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_MAR); 1879 log(level, "\tMAR = %02x %02x %02x %02x %02x %02x %02x %02x\n", 1880 bus_space_read_1(bst, bsh, FE_MAR8), 1881 bus_space_read_1(bst, bsh, FE_MAR9), 1882 bus_space_read_1(bst, bsh, FE_MAR10), 1883 bus_space_read_1(bst, bsh, FE_MAR11), 1884 bus_space_read_1(bst, bsh, FE_MAR12), 1885 bus_space_read_1(bst, bsh, FE_MAR13), 1886 bus_space_read_1(bst, bsh, FE_MAR14), 1887 bus_space_read_1(bst, bsh, FE_MAR15)); 1888 1889 bus_space_write_1(bst, bsh, FE_DLCR7, 1890 (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_BMPR); 1891 log(level, 1892 "\tBMPR = xx xx %02x %02x %02x %02x %02x %02x %02x %02x xx %02x\n", 1893 bus_space_read_1(bst, bsh, FE_BMPR10), 1894 bus_space_read_1(bst, bsh, FE_BMPR11), 1895 bus_space_read_1(bst, bsh, FE_BMPR12), 1896 bus_space_read_1(bst, bsh, FE_BMPR13), 1897 bus_space_read_1(bst, bsh, FE_BMPR14), 1898 bus_space_read_1(bst, bsh, FE_BMPR15), 1899 bus_space_read_1(bst, bsh, FE_BMPR16), 1900 bus_space_read_1(bst, bsh, FE_BMPR17), 1901 bus_space_read_1(bst, bsh, FE_BMPR19)); 1902 1903 bus_space_write_1(bst, bsh, FE_DLCR7, save_dlcr7); 1904 } 1905 #endif 1906
Indexes created Mon Oct 27 02:09:54 GMT 2025