if_fe.c revision 347962
1/*- 2 * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 3 * 4 * This software may be used, modified, copied, distributed, and sold, in 5 * both source and binary form provided that the above copyright, these 6 * terms and the following disclaimer are retained. The name of the author 7 * and/or the contributor may not be used to endorse or promote products 8 * derived from this software without specific prior written permission. 9 * 10 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND 11 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 12 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 13 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE 14 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 15 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 16 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION. 17 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 18 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 19 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 20 * SUCH DAMAGE. 21 */ 22 23#include <sys/cdefs.h> 24__FBSDID("$FreeBSD: stable/11/sys/dev/fe/if_fe.c 347962 2019-05-18 20:43:13Z brooks $"); 25 26/* 27 * 28 * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards. 29 * Contributed by M. Sekiguchi. <seki@sysrap.cs.fujitsu.co.jp> 30 * 31 * This version is intended to be a generic template for various 32 * MB86960A/MB86965A based Ethernet cards. It currently supports 33 * Fujitsu FMV-180 series for ISA and Allied-Telesis AT1700/RE2000 34 * series for ISA, as well as Fujitsu MBH10302 PC Card. 35 * There are some currently- 36 * unused hooks embedded, which are primarily intended to support 37 * other types of Ethernet cards, but the author is not sure whether 38 * they are useful. 39 * 40 * This version also includes some alignments to support RE1000, 41 * C-NET(98)P2 and so on. These cards are not for AT-compatibles, 42 * but for NEC PC-98 bus -- a proprietary bus architecture available 43 * only in Japan. Confusingly, it is different from the Microsoft's 44 * PC98 architecture. :-{ 45 * Further work for PC-98 version will be available as a part of 46 * FreeBSD(98) project. 47 * 48 * This software is a derivative work of if_ed.c version 1.56 by David 49 * Greenman available as a part of FreeBSD 2.0 RELEASE source distribution. 50 * 51 * The following lines are retained from the original if_ed.c: 52 * 53 * Copyright (C) 1993, David Greenman. This software may be used, modified, 54 * copied, distributed, and sold, in both source and binary form provided 55 * that the above copyright and these terms are retained. Under no 56 * circumstances is the author responsible for the proper functioning 57 * of this software, nor does the author assume any responsibility 58 * for damages incurred with its use. 59 */ 60 61/* 62 * TODO: 63 * o To support ISA PnP auto configuration for FMV-183/184. 64 * o To support REX-9886/87(PC-98 only). 65 * o To reconsider mbuf usage. 66 * o To reconsider transmission buffer usage, including 67 * transmission buffer size (currently 4KB x 2) and pros-and- 68 * cons of multiple frame transmission. 69 * o To test IPX codes. 70 * o To test new-bus frontend. 71 */ 72 73#include <sys/param.h> 74#include <sys/kernel.h> 75#include <sys/malloc.h> 76#include <sys/systm.h> 77#include <sys/socket.h> 78#include <sys/sockio.h> 79#include <sys/mbuf.h> 80 81#include <sys/bus.h> 82#include <machine/bus.h> 83#include <sys/rman.h> 84 85#include <net/ethernet.h> 86#include <net/if.h> 87#include <net/if_var.h> 88#include <net/if_dl.h> 89#include <net/if_mib.h> 90#include <net/if_media.h> 91#include <net/if_types.h> 92 93#include <netinet/in.h> 94#include <netinet/if_ether.h> 95 96#include <net/bpf.h> 97 98#include <dev/fe/mb86960.h> 99#include <dev/fe/if_fereg.h> 100#include <dev/fe/if_fevar.h> 101 102/* 103 * Transmit just one packet per a "send" command to 86960. 104 * This option is intended for performance test. An EXPERIMENTAL option. 105 */ 106#ifndef FE_SINGLE_TRANSMISSION 107#define FE_SINGLE_TRANSMISSION 0 108#endif 109 110/* 111 * Maximum loops when interrupt. 112 * This option prevents an infinite loop due to hardware failure. 113 * (Some laptops make an infinite loop after PC Card is ejected.) 114 */ 115#ifndef FE_MAX_LOOP 116#define FE_MAX_LOOP 0x800 117#endif 118 119/* 120 * Device configuration flags. 121 */ 122 123/* DLCR6 settings. */ 124#define FE_FLAGS_DLCR6_VALUE 0x007F 125 126/* Force DLCR6 override. */ 127#define FE_FLAGS_OVERRIDE_DLCR6 0x0080 128 129 130devclass_t fe_devclass; 131 132/* 133 * Special filter values. 134 */ 135static struct fe_filter const fe_filter_nothing = { FE_FILTER_NOTHING }; 136static struct fe_filter const fe_filter_all = { FE_FILTER_ALL }; 137 138/* Standard driver entry points. These can be static. */ 139static void fe_init (void *); 140static void fe_init_locked (struct fe_softc *); 141static driver_intr_t fe_intr; 142static int fe_ioctl (struct ifnet *, u_long, caddr_t); 143static void fe_start (struct ifnet *); 144static void fe_start_locked (struct ifnet *); 145static void fe_watchdog (void *); 146static int fe_medchange (struct ifnet *); 147static void fe_medstat (struct ifnet *, struct ifmediareq *); 148 149/* Local functions. Order of declaration is confused. FIXME. */ 150static int fe_get_packet ( struct fe_softc *, u_short ); 151static void fe_tint ( struct fe_softc *, u_char ); 152static void fe_rint ( struct fe_softc *, u_char ); 153static void fe_xmit ( struct fe_softc * ); 154static void fe_write_mbufs ( struct fe_softc *, struct mbuf * ); 155static void fe_setmode ( struct fe_softc * ); 156static void fe_loadmar ( struct fe_softc * ); 157 158#ifdef DIAGNOSTIC 159static void fe_emptybuffer ( struct fe_softc * ); 160#endif 161 162/* 163 * Fe driver specific constants which relate to 86960/86965. 164 */ 165 166/* Interrupt masks */ 167#define FE_TMASK ( FE_D2_COLL16 | FE_D2_TXDONE ) 168#define FE_RMASK ( FE_D3_OVRFLO | FE_D3_CRCERR \ 169 | FE_D3_ALGERR | FE_D3_SRTPKT | FE_D3_PKTRDY ) 170 171/* Maximum number of iterations for a receive interrupt. */ 172#define FE_MAX_RECV_COUNT ( ( 65536 - 2048 * 2 ) / 64 ) 173 /* 174 * Maximum size of SRAM is 65536, 175 * minimum size of transmission buffer in fe is 2x2KB, 176 * and minimum amount of received packet including headers 177 * added by the chip is 64 bytes. 178 * Hence FE_MAX_RECV_COUNT is the upper limit for number 179 * of packets in the receive buffer. 180 */ 181 182/* 183 * Miscellaneous definitions not directly related to hardware. 184 */ 185 186/* The following line must be delete when "net/if_media.h" support it. */ 187#ifndef IFM_10_FL 188#define IFM_10_FL /* 13 */ IFM_10_5 189#endif 190 191#if 0 192/* Mapping between media bitmap (in fe_softc.mbitmap) and ifm_media. */ 193static int const bit2media [] = { 194 IFM_HDX | IFM_ETHER | IFM_AUTO, 195 IFM_HDX | IFM_ETHER | IFM_MANUAL, 196 IFM_HDX | IFM_ETHER | IFM_10_T, 197 IFM_HDX | IFM_ETHER | IFM_10_2, 198 IFM_HDX | IFM_ETHER | IFM_10_5, 199 IFM_HDX | IFM_ETHER | IFM_10_FL, 200 IFM_FDX | IFM_ETHER | IFM_10_T, 201 /* More can be come here... */ 202 0 203}; 204#else 205/* Mapping between media bitmap (in fe_softc.mbitmap) and ifm_media. */ 206static int const bit2media [] = { 207 IFM_ETHER | IFM_AUTO, 208 IFM_ETHER | IFM_MANUAL, 209 IFM_ETHER | IFM_10_T, 210 IFM_ETHER | IFM_10_2, 211 IFM_ETHER | IFM_10_5, 212 IFM_ETHER | IFM_10_FL, 213 IFM_ETHER | IFM_10_T, 214 /* More can be come here... */ 215 0 216}; 217#endif 218 219/* 220 * Check for specific bits in specific registers have specific values. 221 * A common utility function called from various sub-probe routines. 222 */ 223int 224fe_simple_probe (struct fe_softc const * sc, 225 struct fe_simple_probe_struct const * sp) 226{ 227 struct fe_simple_probe_struct const *p; 228 int8_t bits; 229 230 for (p = sp; p->mask != 0; p++) { 231 bits = fe_inb(sc, p->port); 232 printf("port %d, mask %x, bits %x read %x\n", p->port, 233 p->mask, p->bits, bits); 234 if ((bits & p->mask) != p->bits) 235 return 0; 236 } 237 return 1; 238} 239 240/* Test if a given 6 byte value is a valid Ethernet station (MAC) 241 address. "Vendor" is an expected vendor code (first three bytes,) 242 or a zero when nothing expected. */ 243int 244fe_valid_Ether_p (u_char const * addr, unsigned vendor) 245{ 246#ifdef FE_DEBUG 247 printf("fe?: validating %6D against %06x\n", addr, ":", vendor); 248#endif 249 250 /* All zero is not allowed as a vendor code. */ 251 if (addr[0] == 0 && addr[1] == 0 && addr[2] == 0) return 0; 252 253 switch (vendor) { 254 case 0x000000: 255 /* Legal Ethernet address (stored in ROM) must have 256 its Group and Local bits cleared. */ 257 if ((addr[0] & 0x03) != 0) return 0; 258 break; 259 case 0x020000: 260 /* Same as above, but a local address is allowed in 261 this context. */ 262 if (ETHER_IS_MULTICAST(addr)) return 0; 263 break; 264 default: 265 /* Make sure the vendor part matches if one is given. */ 266 if ( addr[0] != ((vendor >> 16) & 0xFF) 267 || addr[1] != ((vendor >> 8) & 0xFF) 268 || addr[2] != ((vendor ) & 0xFF)) return 0; 269 break; 270 } 271 272 /* Host part must not be all-zeros nor all-ones. */ 273 if (addr[3] == 0xFF && addr[4] == 0xFF && addr[5] == 0xFF) return 0; 274 if (addr[3] == 0x00 && addr[4] == 0x00 && addr[5] == 0x00) return 0; 275 276 /* Given addr looks like an Ethernet address. */ 277 return 1; 278} 279 280/* Fill our softc struct with default value. */ 281void 282fe_softc_defaults (struct fe_softc *sc) 283{ 284 /* Prepare for typical register prototypes. We assume a 285 "typical" board has <32KB> of <fast> SRAM connected with a 286 <byte-wide> data lines. */ 287 sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; 288 sc->proto_dlcr5 = 0; 289 sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB 290 | FE_D6_BBW_BYTE | FE_D6_SBW_WORD | FE_D6_SRAM_100ns; 291 sc->proto_dlcr7 = FE_D7_BYTSWP_LH; 292 sc->proto_bmpr13 = 0; 293 294 /* Assume the probe process (to be done later) is stable. */ 295 sc->stability = 0; 296 297 /* A typical board needs no hooks. */ 298 sc->init = NULL; 299 sc->stop = NULL; 300 301 /* Assume the board has no software-controllable media selection. */ 302 sc->mbitmap = MB_HM; 303 sc->defmedia = MB_HM; 304 sc->msel = NULL; 305} 306 307/* Common error reporting routine used in probe routines for 308 "soft configured IRQ"-type boards. */ 309void 310fe_irq_failure (char const *name, int unit, int irq, char const *list) 311{ 312 printf("fe%d: %s board is detected, but %s IRQ was given\n", 313 unit, name, (irq == NO_IRQ ? "no" : "invalid")); 314 if (list != NULL) { 315 printf("fe%d: specify an IRQ from %s in kernel config\n", 316 unit, list); 317 } 318} 319 320/* 321 * Hardware (vendor) specific hooks. 322 */ 323 324/* 325 * Generic media selection scheme for MB86965 based boards. 326 */ 327void 328fe_msel_965 (struct fe_softc *sc) 329{ 330 u_char b13; 331 332 /* Find the appropriate bits for BMPR13 tranceiver control. */ 333 switch (IFM_SUBTYPE(sc->media.ifm_media)) { 334 case IFM_AUTO: b13 = FE_B13_PORT_AUTO | FE_B13_TPTYPE_UTP; break; 335 case IFM_10_T: b13 = FE_B13_PORT_TP | FE_B13_TPTYPE_UTP; break; 336 default: b13 = FE_B13_PORT_AUI; break; 337 } 338 339 /* Write it into the register. It takes effect immediately. */ 340 fe_outb(sc, FE_BMPR13, sc->proto_bmpr13 | b13); 341} 342 343 344/* 345 * Fujitsu MB86965 JLI mode support routines. 346 */ 347 348/* 349 * Routines to read all bytes from the config EEPROM through MB86965A. 350 * It is a MicroWire (3-wire) serial EEPROM with 6-bit address. 351 * (93C06 or 93C46.) 352 */ 353static void 354fe_strobe_eeprom_jli (struct fe_softc *sc, u_short bmpr16) 355{ 356 /* 357 * We must guarantee 1us (or more) interval to access slow 358 * EEPROMs. The following redundant code provides enough 359 * delay with ISA timing. (Even if the bus clock is "tuned.") 360 * Some modification will be needed on faster busses. 361 */ 362 fe_outb(sc, bmpr16, FE_B16_SELECT); 363 fe_outb(sc, bmpr16, FE_B16_SELECT | FE_B16_CLOCK); 364 fe_outb(sc, bmpr16, FE_B16_SELECT | FE_B16_CLOCK); 365 fe_outb(sc, bmpr16, FE_B16_SELECT); 366} 367 368void 369fe_read_eeprom_jli (struct fe_softc * sc, u_char * data) 370{ 371 u_char n, val, bit; 372 u_char save16, save17; 373 374 /* Save the current value of the EEPROM interface registers. */ 375 save16 = fe_inb(sc, FE_BMPR16); 376 save17 = fe_inb(sc, FE_BMPR17); 377 378 /* Read bytes from EEPROM; two bytes per an iteration. */ 379 for (n = 0; n < JLI_EEPROM_SIZE / 2; n++) { 380 381 /* Reset the EEPROM interface. */ 382 fe_outb(sc, FE_BMPR16, 0x00); 383 fe_outb(sc, FE_BMPR17, 0x00); 384 385 /* Start EEPROM access. */ 386 fe_outb(sc, FE_BMPR16, FE_B16_SELECT); 387 fe_outb(sc, FE_BMPR17, FE_B17_DATA); 388 fe_strobe_eeprom_jli(sc, FE_BMPR16); 389 390 /* Pass the iteration count as well as a READ command. */ 391 val = 0x80 | n; 392 for (bit = 0x80; bit != 0x00; bit >>= 1) { 393 fe_outb(sc, FE_BMPR17, (val & bit) ? FE_B17_DATA : 0); 394 fe_strobe_eeprom_jli(sc, FE_BMPR16); 395 } 396 fe_outb(sc, FE_BMPR17, 0x00); 397 398 /* Read a byte. */ 399 val = 0; 400 for (bit = 0x80; bit != 0x00; bit >>= 1) { 401 fe_strobe_eeprom_jli(sc, FE_BMPR16); 402 if (fe_inb(sc, FE_BMPR17) & FE_B17_DATA) 403 val |= bit; 404 } 405 *data++ = val; 406 407 /* Read one more byte. */ 408 val = 0; 409 for (bit = 0x80; bit != 0x00; bit >>= 1) { 410 fe_strobe_eeprom_jli(sc, FE_BMPR16); 411 if (fe_inb(sc, FE_BMPR17) & FE_B17_DATA) 412 val |= bit; 413 } 414 *data++ = val; 415 } 416 417#if 0 418 /* Reset the EEPROM interface, again. */ 419 fe_outb(sc, FE_BMPR16, 0x00); 420 fe_outb(sc, FE_BMPR17, 0x00); 421#else 422 /* Make sure to restore the original value of EEPROM interface 423 registers, since we are not yet sure we have MB86965A on 424 the address. */ 425 fe_outb(sc, FE_BMPR17, save17); 426 fe_outb(sc, FE_BMPR16, save16); 427#endif 428 429#if 1 430 /* Report what we got. */ 431 if (bootverbose) { 432 int i; 433 data -= JLI_EEPROM_SIZE; 434 for (i = 0; i < JLI_EEPROM_SIZE; i += 16) { 435 if_printf(sc->ifp, 436 "EEPROM(JLI):%3x: %16D\n", i, data + i, " "); 437 } 438 } 439#endif 440} 441 442void 443fe_init_jli (struct fe_softc * sc) 444{ 445 /* "Reset" by writing into a magic location. */ 446 DELAY(200); 447 fe_outb(sc, 0x1E, fe_inb(sc, 0x1E)); 448 DELAY(300); 449} 450 451 452/* 453 * SSi 78Q8377A support routines. 454 */ 455 456/* 457 * Routines to read all bytes from the config EEPROM through 78Q8377A. 458 * It is a MicroWire (3-wire) serial EEPROM with 8-bit address. (I.e., 459 * 93C56 or 93C66.) 460 * 461 * As I don't have SSi manuals, (hmm, an old song again!) I'm not exactly 462 * sure the following code is correct... It is just stolen from the 463 * C-NET(98)P2 support routine in FreeBSD(98). 464 */ 465 466void 467fe_read_eeprom_ssi (struct fe_softc *sc, u_char *data) 468{ 469 u_char val, bit; 470 int n; 471 u_char save6, save7, save12; 472 473 /* Save the current value for the DLCR registers we are about 474 to destroy. */ 475 save6 = fe_inb(sc, FE_DLCR6); 476 save7 = fe_inb(sc, FE_DLCR7); 477 478 /* Put the 78Q8377A into a state that we can access the EEPROM. */ 479 fe_outb(sc, FE_DLCR6, 480 FE_D6_BBW_WORD | FE_D6_SBW_WORD | FE_D6_DLC_DISABLE); 481 fe_outb(sc, FE_DLCR7, 482 FE_D7_BYTSWP_LH | FE_D7_RBS_BMPR | FE_D7_RDYPNS | FE_D7_POWER_UP); 483 484 /* Save the current value for the BMPR12 register, too. */ 485 save12 = fe_inb(sc, FE_DLCR12); 486 487 /* Read bytes from EEPROM; two bytes per an iteration. */ 488 for (n = 0; n < SSI_EEPROM_SIZE / 2; n++) { 489 490 /* Start EEPROM access */ 491 fe_outb(sc, FE_DLCR12, SSI_EEP); 492 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL); 493 494 /* Send the following four bits to the EEPROM in the 495 specified order: a dummy bit, a start bit, and 496 command bits (10) for READ. */ 497 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL ); 498 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK ); /* 0 */ 499 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_DAT); 500 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | SSI_DAT); /* 1 */ 501 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_DAT); 502 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | SSI_DAT); /* 1 */ 503 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL ); 504 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK ); /* 0 */ 505 506 /* Pass the iteration count to the chip. */ 507 for (bit = 0x80; bit != 0x00; bit >>= 1) { 508 val = ( n & bit ) ? SSI_DAT : 0; 509 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | val); 510 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK | val); 511 } 512 513 /* Read a byte. */ 514 val = 0; 515 for (bit = 0x80; bit != 0x00; bit >>= 1) { 516 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL); 517 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK); 518 if (fe_inb(sc, FE_DLCR12) & SSI_DIN) 519 val |= bit; 520 } 521 *data++ = val; 522 523 /* Read one more byte. */ 524 val = 0; 525 for (bit = 0x80; bit != 0x00; bit >>= 1) { 526 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL); 527 fe_outb(sc, FE_DLCR12, SSI_EEP | SSI_CSL | SSI_CLK); 528 if (fe_inb(sc, FE_DLCR12) & SSI_DIN) 529 val |= bit; 530 } 531 *data++ = val; 532 533 fe_outb(sc, FE_DLCR12, SSI_EEP); 534 } 535 536 /* Reset the EEPROM interface. (For now.) */ 537 fe_outb(sc, FE_DLCR12, 0x00); 538 539 /* Restore the saved register values, for the case that we 540 didn't have 78Q8377A at the given address. */ 541 fe_outb(sc, FE_DLCR12, save12); 542 fe_outb(sc, FE_DLCR7, save7); 543 fe_outb(sc, FE_DLCR6, save6); 544 545#if 1 546 /* Report what we got. */ 547 if (bootverbose) { 548 int i; 549 data -= SSI_EEPROM_SIZE; 550 for (i = 0; i < SSI_EEPROM_SIZE; i += 16) { 551 if_printf(sc->ifp, 552 "EEPROM(SSI):%3x: %16D\n", i, data + i, " "); 553 } 554 } 555#endif 556} 557 558/* 559 * TDK/LANX boards support routines. 560 */ 561 562/* It is assumed that the CLK line is low and SDA is high (float) upon entry. */ 563#define LNX_PH(D,K,N) \ 564 ((LNX_SDA_##D | LNX_CLK_##K) << N) 565#define LNX_CYCLE(D1,D2,D3,D4,K1,K2,K3,K4) \ 566 (LNX_PH(D1,K1,0)|LNX_PH(D2,K2,8)|LNX_PH(D3,K3,16)|LNX_PH(D4,K4,24)) 567 568#define LNX_CYCLE_START LNX_CYCLE(HI,LO,LO,HI, HI,HI,LO,LO) 569#define LNX_CYCLE_STOP LNX_CYCLE(LO,LO,HI,HI, LO,HI,HI,LO) 570#define LNX_CYCLE_HI LNX_CYCLE(HI,HI,HI,HI, LO,HI,LO,LO) 571#define LNX_CYCLE_LO LNX_CYCLE(LO,LO,LO,HI, LO,HI,LO,LO) 572#define LNX_CYCLE_INIT LNX_CYCLE(LO,HI,HI,HI, LO,LO,LO,LO) 573 574static void 575fe_eeprom_cycle_lnx (struct fe_softc *sc, u_short reg20, u_long cycle) 576{ 577 fe_outb(sc, reg20, (cycle ) & 0xFF); 578 DELAY(15); 579 fe_outb(sc, reg20, (cycle >> 8) & 0xFF); 580 DELAY(15); 581 fe_outb(sc, reg20, (cycle >> 16) & 0xFF); 582 DELAY(15); 583 fe_outb(sc, reg20, (cycle >> 24) & 0xFF); 584 DELAY(15); 585} 586 587static u_char 588fe_eeprom_receive_lnx (struct fe_softc *sc, u_short reg20) 589{ 590 u_char dat; 591 592 fe_outb(sc, reg20, LNX_CLK_HI | LNX_SDA_FL); 593 DELAY(15); 594 dat = fe_inb(sc, reg20); 595 fe_outb(sc, reg20, LNX_CLK_LO | LNX_SDA_FL); 596 DELAY(15); 597 return (dat & LNX_SDA_IN); 598} 599 600void 601fe_read_eeprom_lnx (struct fe_softc *sc, u_char *data) 602{ 603 int i; 604 u_char n, bit, val; 605 u_char save20; 606 u_short reg20 = 0x14; 607 608 save20 = fe_inb(sc, reg20); 609 610 /* NOTE: DELAY() timing constants are approximately three 611 times longer (slower) than the required minimum. This is 612 to guarantee a reliable operation under some tough 613 conditions... Fortunately, this routine is only called 614 during the boot phase, so the speed is less important than 615 stability. */ 616 617#if 1 618 /* Reset the X24C01's internal state machine and put it into 619 the IDLE state. We usually don't need this, but *if* 620 someone (e.g., probe routine of other driver) write some 621 garbage into the register at 0x14, synchronization will be 622 lost, and the normal EEPROM access protocol won't work. 623 Moreover, as there are no easy way to reset, we need a 624 _manoeuvre_ here. (It even lacks a reset pin, so pushing 625 the RESET button on the PC doesn't help!) */ 626 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_INIT); 627 for (i = 0; i < 10; i++) 628 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_START); 629 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_STOP); 630 DELAY(10000); 631#endif 632 633 /* Issue a start condition. */ 634 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_START); 635 636 /* Send seven bits of the starting address (zero, in this 637 case) and a command bit for READ. */ 638 val = 0x01; 639 for (bit = 0x80; bit != 0x00; bit >>= 1) { 640 if (val & bit) { 641 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_HI); 642 } else { 643 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_LO); 644 } 645 } 646 647 /* Receive an ACK bit. */ 648 if (fe_eeprom_receive_lnx(sc, reg20)) { 649 /* ACK was not received. EEPROM is not present (i.e., 650 this board was not a TDK/LANX) or not working 651 properly. */ 652 if (bootverbose) { 653 if_printf(sc->ifp, 654 "no ACK received from EEPROM(LNX)\n"); 655 } 656 /* Clear the given buffer to indicate we could not get 657 any info. and return. */ 658 bzero(data, LNX_EEPROM_SIZE); 659 goto RET; 660 } 661 662 /* Read bytes from EEPROM. */ 663 for (n = 0; n < LNX_EEPROM_SIZE; n++) { 664 665 /* Read a byte and store it into the buffer. */ 666 val = 0x00; 667 for (bit = 0x80; bit != 0x00; bit >>= 1) { 668 if (fe_eeprom_receive_lnx(sc, reg20)) 669 val |= bit; 670 } 671 *data++ = val; 672 673 /* Acknowledge if we have to read more. */ 674 if (n < LNX_EEPROM_SIZE - 1) { 675 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_LO); 676 } 677 } 678 679 /* Issue a STOP condition, de-activating the clock line. 680 It will be safer to keep the clock line low than to leave 681 it high. */ 682 fe_eeprom_cycle_lnx(sc, reg20, LNX_CYCLE_STOP); 683 684 RET: 685 fe_outb(sc, reg20, save20); 686 687#if 1 688 /* Report what we got. */ 689 if (bootverbose) { 690 data -= LNX_EEPROM_SIZE; 691 for (i = 0; i < LNX_EEPROM_SIZE; i += 16) { 692 if_printf(sc->ifp, 693 "EEPROM(LNX):%3x: %16D\n", i, data + i, " "); 694 } 695 } 696#endif 697} 698 699void 700fe_init_lnx (struct fe_softc * sc) 701{ 702 /* Reset the 86960. Do we need this? FIXME. */ 703 fe_outb(sc, 0x12, 0x06); 704 DELAY(100); 705 fe_outb(sc, 0x12, 0x07); 706 DELAY(100); 707 708 /* Setup IRQ control register on the ASIC. */ 709 fe_outb(sc, 0x14, sc->priv_info); 710} 711 712 713/* 714 * Ungermann-Bass boards support routine. 715 */ 716void 717fe_init_ubn (struct fe_softc * sc) 718{ 719 /* Do we need this? FIXME. */ 720 fe_outb(sc, FE_DLCR7, 721 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 722 fe_outb(sc, 0x18, 0x00); 723 DELAY(200); 724 725 /* Setup IRQ control register on the ASIC. */ 726 fe_outb(sc, 0x14, sc->priv_info); 727} 728 729 730/* 731 * Install interface into kernel networking data structures 732 */ 733int 734fe_attach (device_t dev) 735{ 736 struct fe_softc *sc = device_get_softc(dev); 737 struct ifnet *ifp; 738 int flags = device_get_flags(dev); 739 int b, error; 740 741 ifp = sc->ifp = if_alloc(IFT_ETHER); 742 if (ifp == NULL) { 743 device_printf(dev, "can not ifalloc\n"); 744 fe_release_resource(dev); 745 return (ENOSPC); 746 } 747 748 mtx_init(&sc->lock, device_get_nameunit(dev), MTX_NETWORK_LOCK, 749 MTX_DEF); 750 callout_init_mtx(&sc->timer, &sc->lock, 0); 751 752 /* 753 * Initialize ifnet structure 754 */ 755 ifp->if_softc = sc; 756 if_initname(sc->ifp, device_get_name(dev), device_get_unit(dev)); 757 ifp->if_start = fe_start; 758 ifp->if_ioctl = fe_ioctl; 759 ifp->if_init = fe_init; 760 ifp->if_linkmib = &sc->mibdata; 761 ifp->if_linkmiblen = sizeof (sc->mibdata); 762 763#if 0 /* I'm not sure... */ 764 sc->mibdata.dot3Compliance = DOT3COMPLIANCE_COLLS; 765#endif 766 767 /* 768 * Set fixed interface flags. 769 */ 770 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 771 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 772 773#if FE_SINGLE_TRANSMISSION 774 /* Override txb config to allocate minimum. */ 775 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ 776 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 777#endif 778 779 /* Modify hardware config if it is requested. */ 780 if (flags & FE_FLAGS_OVERRIDE_DLCR6) 781 sc->proto_dlcr6 = flags & FE_FLAGS_DLCR6_VALUE; 782 783 /* Find TX buffer size, based on the hardware dependent proto. */ 784 switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { 785 case FE_D6_TXBSIZ_2x2KB: sc->txb_size = 2048; break; 786 case FE_D6_TXBSIZ_2x4KB: sc->txb_size = 4096; break; 787 case FE_D6_TXBSIZ_2x8KB: sc->txb_size = 8192; break; 788 default: 789 /* Oops, we can't work with single buffer configuration. */ 790 if (bootverbose) { 791 if_printf(sc->ifp, 792 "strange TXBSIZ config; fixing\n"); 793 } 794 sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; 795 sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; 796 sc->txb_size = 2048; 797 break; 798 } 799 800 /* Initialize the if_media interface. */ 801 ifmedia_init(&sc->media, 0, fe_medchange, fe_medstat); 802 for (b = 0; bit2media[b] != 0; b++) { 803 if (sc->mbitmap & (1 << b)) { 804 ifmedia_add(&sc->media, bit2media[b], 0, NULL); 805 } 806 } 807 for (b = 0; bit2media[b] != 0; b++) { 808 if (sc->defmedia & (1 << b)) { 809 ifmedia_set(&sc->media, bit2media[b]); 810 break; 811 } 812 } 813#if 0 /* Turned off; this is called later, when the interface UPs. */ 814 fe_medchange(sc); 815#endif 816 817 /* Attach and stop the interface. */ 818 FE_LOCK(sc); 819 fe_stop(sc); 820 FE_UNLOCK(sc); 821 ether_ifattach(sc->ifp, sc->enaddr); 822 823 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET | INTR_MPSAFE, 824 NULL, fe_intr, sc, &sc->irq_handle); 825 if (error) { 826 ether_ifdetach(ifp); 827 mtx_destroy(&sc->lock); 828 if_free(ifp); 829 fe_release_resource(dev); 830 return ENXIO; 831 } 832 833 /* Print additional info when attached. */ 834 device_printf(dev, "type %s%s\n", sc->typestr, 835 (sc->proto_dlcr4 & FE_D4_DSC) ? ", full duplex" : ""); 836 if (bootverbose) { 837 int buf, txb, bbw, sbw, ram; 838 839 buf = txb = bbw = sbw = ram = -1; 840 switch ( sc->proto_dlcr6 & FE_D6_BUFSIZ ) { 841 case FE_D6_BUFSIZ_8KB: buf = 8; break; 842 case FE_D6_BUFSIZ_16KB: buf = 16; break; 843 case FE_D6_BUFSIZ_32KB: buf = 32; break; 844 case FE_D6_BUFSIZ_64KB: buf = 64; break; 845 } 846 switch ( sc->proto_dlcr6 & FE_D6_TXBSIZ ) { 847 case FE_D6_TXBSIZ_2x2KB: txb = 2; break; 848 case FE_D6_TXBSIZ_2x4KB: txb = 4; break; 849 case FE_D6_TXBSIZ_2x8KB: txb = 8; break; 850 } 851 switch ( sc->proto_dlcr6 & FE_D6_BBW ) { 852 case FE_D6_BBW_BYTE: bbw = 8; break; 853 case FE_D6_BBW_WORD: bbw = 16; break; 854 } 855 switch ( sc->proto_dlcr6 & FE_D6_SBW ) { 856 case FE_D6_SBW_BYTE: sbw = 8; break; 857 case FE_D6_SBW_WORD: sbw = 16; break; 858 } 859 switch ( sc->proto_dlcr6 & FE_D6_SRAM ) { 860 case FE_D6_SRAM_100ns: ram = 100; break; 861 case FE_D6_SRAM_150ns: ram = 150; break; 862 } 863 device_printf(dev, "SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n", 864 buf, bbw, ram, txb, sbw); 865 } 866 if (sc->stability & UNSTABLE_IRQ) 867 device_printf(dev, "warning: IRQ number may be incorrect\n"); 868 if (sc->stability & UNSTABLE_MAC) 869 device_printf(dev, "warning: above MAC address may be incorrect\n"); 870 if (sc->stability & UNSTABLE_TYPE) 871 device_printf(dev, "warning: hardware type was not validated\n"); 872 873 gone_by_fcp101_dev(dev); 874 875 return 0; 876} 877 878int 879fe_alloc_port(device_t dev, int size) 880{ 881 struct fe_softc *sc = device_get_softc(dev); 882 struct resource *res; 883 int rid; 884 885 rid = 0; 886 res = bus_alloc_resource_anywhere(dev, SYS_RES_IOPORT, &rid, 887 size, RF_ACTIVE); 888 if (res) { 889 sc->port_used = size; 890 sc->port_res = res; 891 return (0); 892 } 893 894 return (ENOENT); 895} 896 897int 898fe_alloc_irq(device_t dev, int flags) 899{ 900 struct fe_softc *sc = device_get_softc(dev); 901 struct resource *res; 902 int rid; 903 904 rid = 0; 905 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE | flags); 906 if (res) { 907 sc->irq_res = res; 908 return (0); 909 } 910 911 return (ENOENT); 912} 913 914void 915fe_release_resource(device_t dev) 916{ 917 struct fe_softc *sc = device_get_softc(dev); 918 919 if (sc->port_res) { 920 bus_release_resource(dev, SYS_RES_IOPORT, 0, sc->port_res); 921 sc->port_res = NULL; 922 } 923 if (sc->irq_res) { 924 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 925 sc->irq_res = NULL; 926 } 927} 928 929/* 930 * Reset interface, after some (hardware) trouble is deteced. 931 */ 932static void 933fe_reset (struct fe_softc *sc) 934{ 935 /* Record how many packets are lost by this accident. */ 936 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, sc->txb_sched + sc->txb_count); 937 sc->mibdata.dot3StatsInternalMacTransmitErrors++; 938 939 /* Put the interface into known initial state. */ 940 fe_stop(sc); 941 if (sc->ifp->if_flags & IFF_UP) 942 fe_init_locked(sc); 943} 944 945/* 946 * Stop everything on the interface. 947 * 948 * All buffered packets, both transmitting and receiving, 949 * if any, will be lost by stopping the interface. 950 */ 951void 952fe_stop (struct fe_softc *sc) 953{ 954 955 FE_ASSERT_LOCKED(sc); 956 957 /* Disable interrupts. */ 958 fe_outb(sc, FE_DLCR2, 0x00); 959 fe_outb(sc, FE_DLCR3, 0x00); 960 961 /* Stop interface hardware. */ 962 DELAY(200); 963 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 964 DELAY(200); 965 966 /* Clear all interrupt status. */ 967 fe_outb(sc, FE_DLCR0, 0xFF); 968 fe_outb(sc, FE_DLCR1, 0xFF); 969 970 /* Put the chip in stand-by mode. */ 971 DELAY(200); 972 fe_outb(sc, FE_DLCR7, sc->proto_dlcr7 | FE_D7_POWER_DOWN); 973 DELAY(200); 974 975 /* Reset transmitter variables and interface flags. */ 976 sc->ifp->if_drv_flags &= ~(IFF_DRV_OACTIVE | IFF_DRV_RUNNING); 977 sc->tx_timeout = 0; 978 callout_stop(&sc->timer); 979 sc->txb_free = sc->txb_size; 980 sc->txb_count = 0; 981 sc->txb_sched = 0; 982 983 /* MAR loading can be delayed. */ 984 sc->filter_change = 0; 985 986 /* Call a device-specific hook. */ 987 if (sc->stop) 988 sc->stop(sc); 989} 990 991/* 992 * Device timeout/watchdog routine. Entered if the device neglects to 993 * generate an interrupt after a transmit has been started on it. 994 */ 995static void 996fe_watchdog (void *arg) 997{ 998 struct fe_softc *sc = arg; 999 1000 FE_ASSERT_LOCKED(sc); 1001 1002 if (sc->tx_timeout && --sc->tx_timeout == 0) { 1003 struct ifnet *ifp = sc->ifp; 1004 1005 /* A "debug" message. */ 1006 if_printf(ifp, "transmission timeout (%d+%d)%s\n", 1007 sc->txb_sched, sc->txb_count, 1008 (ifp->if_flags & IFF_UP) ? "" : " when down"); 1009 if (ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS) == 0 && 1010 ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS) == 0) 1011 if_printf(ifp, "wrong IRQ setting in config?\n"); 1012 fe_reset(sc); 1013 } 1014 callout_reset(&sc->timer, hz, fe_watchdog, sc); 1015} 1016 1017/* 1018 * Initialize device. 1019 */ 1020static void 1021fe_init (void * xsc) 1022{ 1023 struct fe_softc *sc = xsc; 1024 1025 FE_LOCK(sc); 1026 fe_init_locked(sc); 1027 FE_UNLOCK(sc); 1028} 1029 1030static void 1031fe_init_locked (struct fe_softc *sc) 1032{ 1033 1034 /* Start initializing 86960. */ 1035 1036 /* Call a hook before we start initializing the chip. */ 1037 if (sc->init) 1038 sc->init(sc); 1039 1040 /* 1041 * Make sure to disable the chip, also. 1042 * This may also help re-programming the chip after 1043 * hot insertion of PCMCIAs. 1044 */ 1045 DELAY(200); 1046 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 1047 DELAY(200); 1048 1049 /* Power up the chip and select register bank for DLCRs. */ 1050 DELAY(200); 1051 fe_outb(sc, FE_DLCR7, 1052 sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP); 1053 DELAY(200); 1054 1055 /* Feed the station address. */ 1056 fe_outblk(sc, FE_DLCR8, IF_LLADDR(sc->ifp), ETHER_ADDR_LEN); 1057 1058 /* Clear multicast address filter to receive nothing. */ 1059 fe_outb(sc, FE_DLCR7, 1060 sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); 1061 fe_outblk(sc, FE_MAR8, fe_filter_nothing.data, FE_FILTER_LEN); 1062 1063 /* Select the BMPR bank for runtime register access. */ 1064 fe_outb(sc, FE_DLCR7, 1065 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 1066 1067 /* Initialize registers. */ 1068 fe_outb(sc, FE_DLCR0, 0xFF); /* Clear all bits. */ 1069 fe_outb(sc, FE_DLCR1, 0xFF); /* ditto. */ 1070 fe_outb(sc, FE_DLCR2, 0x00); 1071 fe_outb(sc, FE_DLCR3, 0x00); 1072 fe_outb(sc, FE_DLCR4, sc->proto_dlcr4); 1073 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5); 1074 fe_outb(sc, FE_BMPR10, 0x00); 1075 fe_outb(sc, FE_BMPR11, FE_B11_CTRL_SKIP | FE_B11_MODE1); 1076 fe_outb(sc, FE_BMPR12, 0x00); 1077 fe_outb(sc, FE_BMPR13, sc->proto_bmpr13); 1078 fe_outb(sc, FE_BMPR14, 0x00); 1079 fe_outb(sc, FE_BMPR15, 0x00); 1080 1081 /* Enable interrupts. */ 1082 fe_outb(sc, FE_DLCR2, FE_TMASK); 1083 fe_outb(sc, FE_DLCR3, FE_RMASK); 1084 1085 /* Select requested media, just before enabling DLC. */ 1086 if (sc->msel) 1087 sc->msel(sc); 1088 1089 /* Enable transmitter and receiver. */ 1090 DELAY(200); 1091 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 1092 DELAY(200); 1093 1094#ifdef DIAGNOSTIC 1095 /* 1096 * Make sure to empty the receive buffer. 1097 * 1098 * This may be redundant, but *if* the receive buffer were full 1099 * at this point, then the driver would hang. I have experienced 1100 * some strange hang-up just after UP. I hope the following 1101 * code solve the problem. 1102 * 1103 * I have changed the order of hardware initialization. 1104 * I think the receive buffer cannot have any packets at this 1105 * point in this version. The following code *must* be 1106 * redundant now. FIXME. 1107 * 1108 * I've heard a rumore that on some PC Card implementation of 1109 * 8696x, the receive buffer can have some data at this point. 1110 * The following message helps discovering the fact. FIXME. 1111 */ 1112 if (!(fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP)) { 1113 if_printf(sc->ifp, 1114 "receive buffer has some data after reset\n"); 1115 fe_emptybuffer(sc); 1116 } 1117 1118 /* Do we need this here? Actually, no. I must be paranoia. */ 1119 fe_outb(sc, FE_DLCR0, 0xFF); /* Clear all bits. */ 1120 fe_outb(sc, FE_DLCR1, 0xFF); /* ditto. */ 1121#endif 1122 1123 /* Set 'running' flag, because we are now running. */ 1124 sc->ifp->if_drv_flags |= IFF_DRV_RUNNING; 1125 callout_reset(&sc->timer, hz, fe_watchdog, sc); 1126 1127 /* 1128 * At this point, the interface is running properly, 1129 * except that it receives *no* packets. we then call 1130 * fe_setmode() to tell the chip what packets to be 1131 * received, based on the if_flags and multicast group 1132 * list. It completes the initialization process. 1133 */ 1134 fe_setmode(sc); 1135 1136#if 0 1137 /* ...and attempt to start output queued packets. */ 1138 /* TURNED OFF, because the semi-auto media prober wants to UP 1139 the interface keeping it idle. The upper layer will soon 1140 start the interface anyway, and there are no significant 1141 delay. */ 1142 fe_start_locked(sc->ifp); 1143#endif 1144} 1145 1146/* 1147 * This routine actually starts the transmission on the interface 1148 */ 1149static void 1150fe_xmit (struct fe_softc *sc) 1151{ 1152 /* 1153 * Set a timer just in case we never hear from the board again. 1154 * We use longer timeout for multiple packet transmission. 1155 * I'm not sure this timer value is appropriate. FIXME. 1156 */ 1157 sc->tx_timeout = 1 + sc->txb_count; 1158 1159 /* Update txb variables. */ 1160 sc->txb_sched = sc->txb_count; 1161 sc->txb_count = 0; 1162 sc->txb_free = sc->txb_size; 1163 sc->tx_excolls = 0; 1164 1165 /* Start transmitter, passing packets in TX buffer. */ 1166 fe_outb(sc, FE_BMPR10, sc->txb_sched | FE_B10_START); 1167} 1168 1169/* 1170 * Start output on interface. 1171 * We make one assumption here: 1172 * 1) that the IFF_DRV_OACTIVE flag is checked before this code is called 1173 * (i.e. that the output part of the interface is idle) 1174 */ 1175static void 1176fe_start (struct ifnet *ifp) 1177{ 1178 struct fe_softc *sc = ifp->if_softc; 1179 1180 FE_LOCK(sc); 1181 fe_start_locked(ifp); 1182 FE_UNLOCK(sc); 1183} 1184 1185static void 1186fe_start_locked (struct ifnet *ifp) 1187{ 1188 struct fe_softc *sc = ifp->if_softc; 1189 struct mbuf *m; 1190 1191#ifdef DIAGNOSTIC 1192 /* Just a sanity check. */ 1193 if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) { 1194 /* 1195 * Txb_count and txb_free co-works to manage the 1196 * transmission buffer. Txb_count keeps track of the 1197 * used potion of the buffer, while txb_free does unused 1198 * potion. So, as long as the driver runs properly, 1199 * txb_count is zero if and only if txb_free is same 1200 * as txb_size (which represents whole buffer.) 1201 */ 1202 if_printf(ifp, "inconsistent txb variables (%d, %d)\n", 1203 sc->txb_count, sc->txb_free); 1204 /* 1205 * So, what should I do, then? 1206 * 1207 * We now know txb_count and txb_free contradicts. We 1208 * cannot, however, tell which is wrong. More 1209 * over, we cannot peek 86960 transmission buffer or 1210 * reset the transmission buffer. (In fact, we can 1211 * reset the entire interface. I don't want to do it.) 1212 * 1213 * If txb_count is incorrect, leaving it as-is will cause 1214 * sending of garbage after next interrupt. We have to 1215 * avoid it. Hence, we reset the txb_count here. If 1216 * txb_free was incorrect, resetting txb_count just loses 1217 * some packets. We can live with it. 1218 */ 1219 sc->txb_count = 0; 1220 } 1221#endif 1222 1223 /* 1224 * First, see if there are buffered packets and an idle 1225 * transmitter - should never happen at this point. 1226 */ 1227 if ((sc->txb_count > 0) && (sc->txb_sched == 0)) { 1228 if_printf(ifp, "transmitter idle with %d buffered packets\n", 1229 sc->txb_count); 1230 fe_xmit(sc); 1231 } 1232 1233 /* 1234 * Stop accepting more transmission packets temporarily, when 1235 * a filter change request is delayed. Updating the MARs on 1236 * 86960 flushes the transmission buffer, so it is delayed 1237 * until all buffered transmission packets have been sent 1238 * out. 1239 */ 1240 if (sc->filter_change) { 1241 /* 1242 * Filter change request is delayed only when the DLC is 1243 * working. DLC soon raise an interrupt after finishing 1244 * the work. 1245 */ 1246 goto indicate_active; 1247 } 1248 1249 for (;;) { 1250 1251 /* 1252 * See if there is room to put another packet in the buffer. 1253 * We *could* do better job by peeking the send queue to 1254 * know the length of the next packet. Current version just 1255 * tests against the worst case (i.e., longest packet). FIXME. 1256 * 1257 * When adding the packet-peek feature, don't forget adding a 1258 * test on txb_count against QUEUEING_MAX. 1259 * There is a little chance the packet count exceeds 1260 * the limit. Assume transmission buffer is 8KB (2x8KB 1261 * configuration) and an application sends a bunch of small 1262 * (i.e., minimum packet sized) packets rapidly. An 8KB 1263 * buffer can hold 130 blocks of 62 bytes long... 1264 */ 1265 if (sc->txb_free 1266 < ETHER_MAX_LEN - ETHER_CRC_LEN + FE_DATA_LEN_LEN) { 1267 /* No room. */ 1268 goto indicate_active; 1269 } 1270 1271#if FE_SINGLE_TRANSMISSION 1272 if (sc->txb_count > 0) { 1273 /* Just one packet per a transmission buffer. */ 1274 goto indicate_active; 1275 } 1276#endif 1277 1278 /* 1279 * Get the next mbuf chain for a packet to send. 1280 */ 1281 IF_DEQUEUE(&sc->ifp->if_snd, m); 1282 if (m == NULL) { 1283 /* No more packets to send. */ 1284 goto indicate_inactive; 1285 } 1286 1287 /* 1288 * Copy the mbuf chain into the transmission buffer. 1289 * txb_* variables are updated as necessary. 1290 */ 1291 fe_write_mbufs(sc, m); 1292 1293 /* Start transmitter if it's idle. */ 1294 if ((sc->txb_count > 0) && (sc->txb_sched == 0)) 1295 fe_xmit(sc); 1296 1297 /* 1298 * Tap off here if there is a bpf listener, 1299 * and the device is *not* in promiscuous mode. 1300 * (86960 receives self-generated packets if 1301 * and only if it is in "receive everything" 1302 * mode.) 1303 */ 1304 if (!(sc->ifp->if_flags & IFF_PROMISC)) 1305 BPF_MTAP(sc->ifp, m); 1306 1307 m_freem(m); 1308 } 1309 1310 indicate_inactive: 1311 /* 1312 * We are using the !OACTIVE flag to indicate to 1313 * the outside world that we can accept an 1314 * additional packet rather than that the 1315 * transmitter is _actually_ active. Indeed, the 1316 * transmitter may be active, but if we haven't 1317 * filled all the buffers with data then we still 1318 * want to accept more. 1319 */ 1320 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1321 return; 1322 1323 indicate_active: 1324 /* 1325 * The transmitter is active, and there are no room for 1326 * more outgoing packets in the transmission buffer. 1327 */ 1328 sc->ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1329 return; 1330} 1331 1332/* 1333 * Drop (skip) a packet from receive buffer in 86960 memory. 1334 */ 1335static void 1336fe_droppacket (struct fe_softc * sc, int len) 1337{ 1338 int i; 1339 1340 /* 1341 * 86960 manual says that we have to read 8 bytes from the buffer 1342 * before skip the packets and that there must be more than 8 bytes 1343 * remaining in the buffer when issue a skip command. 1344 * Remember, we have already read 4 bytes before come here. 1345 */ 1346 if (len > 12) { 1347 /* Read 4 more bytes, and skip the rest of the packet. */ 1348 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1349 { 1350 (void) fe_inb(sc, FE_BMPR8); 1351 (void) fe_inb(sc, FE_BMPR8); 1352 (void) fe_inb(sc, FE_BMPR8); 1353 (void) fe_inb(sc, FE_BMPR8); 1354 } 1355 else 1356 { 1357 (void) fe_inw(sc, FE_BMPR8); 1358 (void) fe_inw(sc, FE_BMPR8); 1359 } 1360 fe_outb(sc, FE_BMPR14, FE_B14_SKIP); 1361 } else { 1362 /* We should not come here unless receiving RUNTs. */ 1363 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1364 { 1365 for (i = 0; i < len; i++) 1366 (void) fe_inb(sc, FE_BMPR8); 1367 } 1368 else 1369 { 1370 for (i = 0; i < len; i += 2) 1371 (void) fe_inw(sc, FE_BMPR8); 1372 } 1373 } 1374} 1375 1376#ifdef DIAGNOSTIC 1377/* 1378 * Empty receiving buffer. 1379 */ 1380static void 1381fe_emptybuffer (struct fe_softc * sc) 1382{ 1383 int i; 1384 u_char saved_dlcr5; 1385 1386#ifdef FE_DEBUG 1387 if_printf(sc->ifp, "emptying receive buffer\n"); 1388#endif 1389 1390 /* 1391 * Stop receiving packets, temporarily. 1392 */ 1393 saved_dlcr5 = fe_inb(sc, FE_DLCR5); 1394 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5); 1395 DELAY(1300); 1396 1397 /* 1398 * When we come here, the receive buffer management may 1399 * have been broken. So, we cannot use skip operation. 1400 * Just discard everything in the buffer. 1401 */ 1402 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1403 { 1404 for (i = 0; i < 65536; i++) { 1405 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP) 1406 break; 1407 (void) fe_inb(sc, FE_BMPR8); 1408 } 1409 } 1410 else 1411 { 1412 for (i = 0; i < 65536; i += 2) { 1413 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP) 1414 break; 1415 (void) fe_inw(sc, FE_BMPR8); 1416 } 1417 } 1418 1419 /* 1420 * Double check. 1421 */ 1422 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP) { 1423 if_printf(sc->ifp, 1424 "could not empty receive buffer\n"); 1425 /* Hmm. What should I do if this happens? FIXME. */ 1426 } 1427 1428 /* 1429 * Restart receiving packets. 1430 */ 1431 fe_outb(sc, FE_DLCR5, saved_dlcr5); 1432} 1433#endif 1434 1435/* 1436 * Transmission interrupt handler 1437 * The control flow of this function looks silly. FIXME. 1438 */ 1439static void 1440fe_tint (struct fe_softc * sc, u_char tstat) 1441{ 1442 int left; 1443 int col; 1444 1445 /* 1446 * Handle "excessive collision" interrupt. 1447 */ 1448 if (tstat & FE_D0_COLL16) { 1449 1450 /* 1451 * Find how many packets (including this collided one) 1452 * are left unsent in transmission buffer. 1453 */ 1454 left = fe_inb(sc, FE_BMPR10); 1455 if_printf(sc->ifp, "excessive collision (%d/%d)\n", 1456 left, sc->txb_sched); 1457 1458 /* 1459 * Clear the collision flag (in 86960) here 1460 * to avoid confusing statistics. 1461 */ 1462 fe_outb(sc, FE_DLCR0, FE_D0_COLLID); 1463 1464 /* 1465 * Restart transmitter, skipping the 1466 * collided packet. 1467 * 1468 * We *must* skip the packet to keep network running 1469 * properly. Excessive collision error is an 1470 * indication of the network overload. If we 1471 * tried sending the same packet after excessive 1472 * collision, the network would be filled with 1473 * out-of-time packets. Packets belonging 1474 * to reliable transport (such as TCP) are resent 1475 * by some upper layer. 1476 */ 1477 fe_outb(sc, FE_BMPR11, FE_B11_CTRL_SKIP | FE_B11_MODE1); 1478 1479 /* Update statistics. */ 1480 sc->tx_excolls++; 1481 } 1482 1483 /* 1484 * Handle "transmission complete" interrupt. 1485 */ 1486 if (tstat & FE_D0_TXDONE) { 1487 1488 /* 1489 * Add in total number of collisions on last 1490 * transmission. We also clear "collision occurred" flag 1491 * here. 1492 * 1493 * 86960 has a design flaw on collision count on multiple 1494 * packet transmission. When we send two or more packets 1495 * with one start command (that's what we do when the 1496 * transmission queue is crowded), 86960 informs us number 1497 * of collisions occurred on the last packet on the 1498 * transmission only. Number of collisions on previous 1499 * packets are lost. I have told that the fact is clearly 1500 * stated in the Fujitsu document. 1501 * 1502 * I considered not to mind it seriously. Collision 1503 * count is not so important, anyway. Any comments? FIXME. 1504 */ 1505 1506 if (fe_inb(sc, FE_DLCR0) & FE_D0_COLLID) { 1507 1508 /* Clear collision flag. */ 1509 fe_outb(sc, FE_DLCR0, FE_D0_COLLID); 1510 1511 /* Extract collision count from 86960. */ 1512 col = fe_inb(sc, FE_DLCR4); 1513 col = (col & FE_D4_COL) >> FE_D4_COL_SHIFT; 1514 if (col == 0) { 1515 /* 1516 * Status register indicates collisions, 1517 * while the collision count is zero. 1518 * This can happen after multiple packet 1519 * transmission, indicating that one or more 1520 * previous packet(s) had been collided. 1521 * 1522 * Since the accurate number of collisions 1523 * has been lost, we just guess it as 1; 1524 * Am I too optimistic? FIXME. 1525 */ 1526 col = 1; 1527 } 1528 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, col); 1529 if (col == 1) 1530 sc->mibdata.dot3StatsSingleCollisionFrames++; 1531 else 1532 sc->mibdata.dot3StatsMultipleCollisionFrames++; 1533 sc->mibdata.dot3StatsCollFrequencies[col-1]++; 1534 } 1535 1536 /* 1537 * Update transmission statistics. 1538 * Be sure to reflect number of excessive collisions. 1539 */ 1540 col = sc->tx_excolls; 1541 if_inc_counter(sc->ifp, IFCOUNTER_OPACKETS, sc->txb_sched - col); 1542 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, col); 1543 if_inc_counter(sc->ifp, IFCOUNTER_COLLISIONS, col * 16); 1544 sc->mibdata.dot3StatsExcessiveCollisions += col; 1545 sc->mibdata.dot3StatsCollFrequencies[15] += col; 1546 sc->txb_sched = 0; 1547 1548 /* 1549 * The transmitter is no more active. 1550 * Reset output active flag and watchdog timer. 1551 */ 1552 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1553 sc->tx_timeout = 0; 1554 1555 /* 1556 * If more data is ready to transmit in the buffer, start 1557 * transmitting them. Otherwise keep transmitter idle, 1558 * even if more data is queued. This gives receive 1559 * process a slight priority. 1560 */ 1561 if (sc->txb_count > 0) 1562 fe_xmit(sc); 1563 } 1564} 1565 1566/* 1567 * Ethernet interface receiver interrupt. 1568 */ 1569static void 1570fe_rint (struct fe_softc * sc, u_char rstat) 1571{ 1572 u_short len; 1573 u_char status; 1574 int i; 1575 1576 /* 1577 * Update statistics if this interrupt is caused by an error. 1578 * Note that, when the system was not sufficiently fast, the 1579 * receive interrupt might not be acknowledged immediately. If 1580 * one or more errornous frames were received before this routine 1581 * was scheduled, they are ignored, and the following error stats 1582 * give less than real values. 1583 */ 1584 if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | FE_D1_SRTPKT)) { 1585 if (rstat & FE_D1_OVRFLO) 1586 sc->mibdata.dot3StatsInternalMacReceiveErrors++; 1587 if (rstat & FE_D1_CRCERR) 1588 sc->mibdata.dot3StatsFCSErrors++; 1589 if (rstat & FE_D1_ALGERR) 1590 sc->mibdata.dot3StatsAlignmentErrors++; 1591#if 0 1592 /* The reference MAC receiver defined in 802.3 1593 silently ignores short frames (RUNTs) without 1594 notifying upper layer. RFC 1650 (dot3 MIB) is 1595 based on the 802.3, and it has no stats entry for 1596 RUNTs... */ 1597 if (rstat & FE_D1_SRTPKT) 1598 sc->mibdata.dot3StatsFrameTooShorts++; /* :-) */ 1599#endif 1600 if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1); 1601 } 1602 1603 /* 1604 * MB86960 has a flag indicating "receive queue empty." 1605 * We just loop, checking the flag, to pull out all received 1606 * packets. 1607 * 1608 * We limit the number of iterations to avoid infinite-loop. 1609 * The upper bound is set to unrealistic high value. 1610 */ 1611 for (i = 0; i < FE_MAX_RECV_COUNT * 2; i++) { 1612 1613 /* Stop the iteration if 86960 indicates no packets. */ 1614 if (fe_inb(sc, FE_DLCR5) & FE_D5_BUFEMP) 1615 return; 1616 1617 /* 1618 * Extract a receive status byte. 1619 * As our 86960 is in 16 bit bus access mode, we have to 1620 * use inw() to get the status byte. The significant 1621 * value is returned in lower 8 bits. 1622 */ 1623 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1624 { 1625 status = fe_inb(sc, FE_BMPR8); 1626 (void) fe_inb(sc, FE_BMPR8); 1627 } 1628 else 1629 { 1630 status = (u_char) fe_inw(sc, FE_BMPR8); 1631 } 1632 1633 /* 1634 * Extract the packet length. 1635 * It is a sum of a header (14 bytes) and a payload. 1636 * CRC has been stripped off by the 86960. 1637 */ 1638 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1639 { 1640 len = fe_inb(sc, FE_BMPR8); 1641 len |= (fe_inb(sc, FE_BMPR8) << 8); 1642 } 1643 else 1644 { 1645 len = fe_inw(sc, FE_BMPR8); 1646 } 1647 1648 /* 1649 * AS our 86960 is programed to ignore errored frame, 1650 * we must not see any error indication in the 1651 * receive buffer. So, any error condition is a 1652 * serious error, e.g., out-of-sync of the receive 1653 * buffer pointers. 1654 */ 1655 if ((status & 0xF0) != 0x20 || 1656 len > ETHER_MAX_LEN - ETHER_CRC_LEN || 1657 len < ETHER_MIN_LEN - ETHER_CRC_LEN) { 1658 if_printf(sc->ifp, 1659 "RX buffer out-of-sync\n"); 1660 if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1); 1661 sc->mibdata.dot3StatsInternalMacReceiveErrors++; 1662 fe_reset(sc); 1663 return; 1664 } 1665 1666 /* 1667 * Go get a packet. 1668 */ 1669 if (fe_get_packet(sc, len) < 0) { 1670 /* 1671 * Negative return from fe_get_packet() 1672 * indicates no available mbuf. We stop 1673 * receiving packets, even if there are more 1674 * in the buffer. We hope we can get more 1675 * mbuf next time. 1676 */ 1677 if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1); 1678 sc->mibdata.dot3StatsMissedFrames++; 1679 fe_droppacket(sc, len); 1680 return; 1681 } 1682 1683 /* Successfully received a packet. Update stat. */ 1684 if_inc_counter(sc->ifp, IFCOUNTER_IPACKETS, 1); 1685 } 1686 1687 /* Maximum number of frames has been received. Something 1688 strange is happening here... */ 1689 if_printf(sc->ifp, "unusual receive flood\n"); 1690 sc->mibdata.dot3StatsInternalMacReceiveErrors++; 1691 fe_reset(sc); 1692} 1693 1694/* 1695 * Ethernet interface interrupt processor 1696 */ 1697static void 1698fe_intr (void *arg) 1699{ 1700 struct fe_softc *sc = arg; 1701 u_char tstat, rstat; 1702 int loop_count = FE_MAX_LOOP; 1703 1704 FE_LOCK(sc); 1705 1706 /* Loop until there are no more new interrupt conditions. */ 1707 while (loop_count-- > 0) { 1708 /* 1709 * Get interrupt conditions, masking unneeded flags. 1710 */ 1711 tstat = fe_inb(sc, FE_DLCR0) & FE_TMASK; 1712 rstat = fe_inb(sc, FE_DLCR1) & FE_RMASK; 1713 if (tstat == 0 && rstat == 0) { 1714 FE_UNLOCK(sc); 1715 return; 1716 } 1717 1718 /* 1719 * Reset the conditions we are acknowledging. 1720 */ 1721 fe_outb(sc, FE_DLCR0, tstat); 1722 fe_outb(sc, FE_DLCR1, rstat); 1723 1724 /* 1725 * Handle transmitter interrupts. 1726 */ 1727 if (tstat) 1728 fe_tint(sc, tstat); 1729 1730 /* 1731 * Handle receiver interrupts 1732 */ 1733 if (rstat) 1734 fe_rint(sc, rstat); 1735 1736 /* 1737 * Update the multicast address filter if it is 1738 * needed and possible. We do it now, because 1739 * we can make sure the transmission buffer is empty, 1740 * and there is a good chance that the receive queue 1741 * is empty. It will minimize the possibility of 1742 * packet loss. 1743 */ 1744 if (sc->filter_change && 1745 sc->txb_count == 0 && sc->txb_sched == 0) { 1746 fe_loadmar(sc); 1747 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1748 } 1749 1750 /* 1751 * If it looks like the transmitter can take more data, 1752 * attempt to start output on the interface. This is done 1753 * after handling the receiver interrupt to give the 1754 * receive operation priority. 1755 * 1756 * BTW, I'm not sure in what case the OACTIVE is on at 1757 * this point. Is the following test redundant? 1758 * 1759 * No. This routine polls for both transmitter and 1760 * receiver interrupts. 86960 can raise a receiver 1761 * interrupt when the transmission buffer is full. 1762 */ 1763 if ((sc->ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0) 1764 fe_start_locked(sc->ifp); 1765 } 1766 FE_UNLOCK(sc); 1767 1768 if_printf(sc->ifp, "too many loops\n"); 1769} 1770 1771/* 1772 * Process an ioctl request. This code needs some work - it looks 1773 * pretty ugly. 1774 */ 1775static int 1776fe_ioctl (struct ifnet * ifp, u_long command, caddr_t data) 1777{ 1778 struct fe_softc *sc = ifp->if_softc; 1779 struct ifreq *ifr = (struct ifreq *)data; 1780 int error = 0; 1781 1782 switch (command) { 1783 1784 case SIOCSIFFLAGS: 1785 /* 1786 * Switch interface state between "running" and 1787 * "stopped", reflecting the UP flag. 1788 */ 1789 FE_LOCK(sc); 1790 if (sc->ifp->if_flags & IFF_UP) { 1791 if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 1792 fe_init_locked(sc); 1793 } else { 1794 if ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 1795 fe_stop(sc); 1796 } 1797 1798 /* 1799 * Promiscuous and/or multicast flags may have changed, 1800 * so reprogram the multicast filter and/or receive mode. 1801 */ 1802 fe_setmode(sc); 1803 FE_UNLOCK(sc); 1804 1805 /* Done. */ 1806 break; 1807 1808 case SIOCADDMULTI: 1809 case SIOCDELMULTI: 1810 /* 1811 * Multicast list has changed; set the hardware filter 1812 * accordingly. 1813 */ 1814 FE_LOCK(sc); 1815 fe_setmode(sc); 1816 FE_UNLOCK(sc); 1817 break; 1818 1819 case SIOCSIFMEDIA: 1820 case SIOCGIFMEDIA: 1821 /* Let if_media to handle these commands and to call 1822 us back. */ 1823 error = ifmedia_ioctl(ifp, ifr, &sc->media, command); 1824 break; 1825 1826 default: 1827 error = ether_ioctl(ifp, command, data); 1828 break; 1829 } 1830 1831 return (error); 1832} 1833 1834/* 1835 * Retrieve packet from receive buffer and send to the next level up via 1836 * ether_input(). 1837 * Returns 0 if success, -1 if error (i.e., mbuf allocation failure). 1838 */ 1839static int 1840fe_get_packet (struct fe_softc * sc, u_short len) 1841{ 1842 struct ifnet *ifp = sc->ifp; 1843 struct ether_header *eh; 1844 struct mbuf *m; 1845 1846 FE_ASSERT_LOCKED(sc); 1847 1848 /* 1849 * NFS wants the data be aligned to the word (4 byte) 1850 * boundary. Ethernet header has 14 bytes. There is a 1851 * 2-byte gap. 1852 */ 1853#define NFS_MAGIC_OFFSET 2 1854 1855 /* 1856 * This function assumes that an Ethernet packet fits in an 1857 * mbuf (with a cluster attached when necessary.) On FreeBSD 1858 * 2.0 for x86, which is the primary target of this driver, an 1859 * mbuf cluster has 4096 bytes, and we are happy. On ancient 1860 * BSDs, such as vanilla 4.3 for 386, a cluster size was 1024, 1861 * however. If the following #error message were printed upon 1862 * compile, you need to rewrite this function. 1863 */ 1864#if ( MCLBYTES < ETHER_MAX_LEN - ETHER_CRC_LEN + NFS_MAGIC_OFFSET ) 1865#error "Too small MCLBYTES to use fe driver." 1866#endif 1867 1868 /* 1869 * Our strategy has one more problem. There is a policy on 1870 * mbuf cluster allocation. It says that we must have at 1871 * least MINCLSIZE (208 bytes on FreeBSD 2.0 for x86) to 1872 * allocate a cluster. For a packet of a size between 1873 * (MHLEN - 2) to (MINCLSIZE - 2), our code violates the rule... 1874 * On the other hand, the current code is short, simple, 1875 * and fast, however. It does no harmful thing, just waists 1876 * some memory. Any comments? FIXME. 1877 */ 1878 1879 /* Allocate an mbuf with packet header info. */ 1880 MGETHDR(m, M_NOWAIT, MT_DATA); 1881 if (m == NULL) 1882 return -1; 1883 1884 /* Attach a cluster if this packet doesn't fit in a normal mbuf. */ 1885 if (len > MHLEN - NFS_MAGIC_OFFSET) { 1886 if (!(MCLGET(m, M_NOWAIT))) { 1887 m_freem(m); 1888 return -1; 1889 } 1890 } 1891 1892 /* Initialize packet header info. */ 1893 m->m_pkthdr.rcvif = ifp; 1894 m->m_pkthdr.len = len; 1895 1896 /* Set the length of this packet. */ 1897 m->m_len = len; 1898 1899 /* The following silliness is to make NFS happy */ 1900 m->m_data += NFS_MAGIC_OFFSET; 1901 1902 /* Get (actually just point to) the header part. */ 1903 eh = mtod(m, struct ether_header *); 1904 1905 /* Get a packet. */ 1906 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1907 { 1908 fe_insb(sc, FE_BMPR8, (u_int8_t *)eh, len); 1909 } 1910 else 1911 { 1912 fe_insw(sc, FE_BMPR8, (u_int16_t *)eh, (len + 1) >> 1); 1913 } 1914 1915 /* Feed the packet to upper layer. */ 1916 FE_UNLOCK(sc); 1917 (*ifp->if_input)(ifp, m); 1918 FE_LOCK(sc); 1919 return 0; 1920} 1921 1922/* 1923 * Write an mbuf chain to the transmission buffer memory using 16 bit PIO. 1924 * Returns number of bytes actually written, including length word. 1925 * 1926 * If an mbuf chain is too long for an Ethernet frame, it is not sent. 1927 * Packets shorter than Ethernet minimum are legal, and we pad them 1928 * before sending out. An exception is "partial" packets which are 1929 * shorter than mandatory Ethernet header. 1930 */ 1931static void 1932fe_write_mbufs (struct fe_softc *sc, struct mbuf *m) 1933{ 1934 u_short length, len; 1935 struct mbuf *mp; 1936 u_char *data; 1937 u_short savebyte; /* WARNING: Architecture dependent! */ 1938#define NO_PENDING_BYTE 0xFFFF 1939 1940 static u_char padding [ETHER_MIN_LEN - ETHER_CRC_LEN - ETHER_HDR_LEN]; 1941 1942#ifdef DIAGNOSTIC 1943 /* First, count up the total number of bytes to copy */ 1944 length = 0; 1945 for (mp = m; mp != NULL; mp = mp->m_next) 1946 length += mp->m_len; 1947 1948 /* Check if this matches the one in the packet header. */ 1949 if (length != m->m_pkthdr.len) { 1950 if_printf(sc->ifp, 1951 "packet length mismatch? (%d/%d)\n", 1952 length, m->m_pkthdr.len); 1953 } 1954#else 1955 /* Just use the length value in the packet header. */ 1956 length = m->m_pkthdr.len; 1957#endif 1958 1959#ifdef DIAGNOSTIC 1960 /* 1961 * Should never send big packets. If such a packet is passed, 1962 * it should be a bug of upper layer. We just ignore it. 1963 * ... Partial (too short) packets, neither. 1964 */ 1965 if (length < ETHER_HDR_LEN || 1966 length > ETHER_MAX_LEN - ETHER_CRC_LEN) { 1967 if_printf(sc->ifp, 1968 "got an out-of-spec packet (%u bytes) to send\n", length); 1969 if_inc_counter(sc->ifp, IFCOUNTER_OERRORS, 1); 1970 sc->mibdata.dot3StatsInternalMacTransmitErrors++; 1971 return; 1972 } 1973#endif 1974 1975 /* 1976 * Put the length word for this frame. 1977 * Does 86960 accept odd length? -- Yes. 1978 * Do we need to pad the length to minimum size by ourselves? 1979 * -- Generally yes. But for (or will be) the last 1980 * packet in the transmission buffer, we can skip the 1981 * padding process. It may gain performance slightly. FIXME. 1982 */ 1983 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 1984 { 1985 len = max(length, ETHER_MIN_LEN - ETHER_CRC_LEN); 1986 fe_outb(sc, FE_BMPR8, len & 0x00ff); 1987 fe_outb(sc, FE_BMPR8, (len & 0xff00) >> 8); 1988 } 1989 else 1990 { 1991 fe_outw(sc, FE_BMPR8, 1992 max(length, ETHER_MIN_LEN - ETHER_CRC_LEN)); 1993 } 1994 1995 /* 1996 * Update buffer status now. 1997 * Truncate the length up to an even number, since we use outw(). 1998 */ 1999 if ((sc->proto_dlcr6 & FE_D6_SBW) != FE_D6_SBW_BYTE) 2000 { 2001 length = (length + 1) & ~1; 2002 } 2003 sc->txb_free -= FE_DATA_LEN_LEN + 2004 max(length, ETHER_MIN_LEN - ETHER_CRC_LEN); 2005 sc->txb_count++; 2006 2007 /* 2008 * Transfer the data from mbuf chain to the transmission buffer. 2009 * MB86960 seems to require that data be transferred as words, and 2010 * only words. So that we require some extra code to patch 2011 * over odd-length mbufs. 2012 */ 2013 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 2014 { 2015 /* 8-bit cards are easy. */ 2016 for (mp = m; mp != NULL; mp = mp->m_next) { 2017 if (mp->m_len) 2018 fe_outsb(sc, FE_BMPR8, mtod(mp, caddr_t), 2019 mp->m_len); 2020 } 2021 } 2022 else 2023 { 2024 /* 16-bit cards are a pain. */ 2025 savebyte = NO_PENDING_BYTE; 2026 for (mp = m; mp != NULL; mp = mp->m_next) { 2027 2028 /* Ignore empty mbuf. */ 2029 len = mp->m_len; 2030 if (len == 0) 2031 continue; 2032 2033 /* Find the actual data to send. */ 2034 data = mtod(mp, caddr_t); 2035 2036 /* Finish the last byte. */ 2037 if (savebyte != NO_PENDING_BYTE) { 2038 fe_outw(sc, FE_BMPR8, savebyte | (*data << 8)); 2039 data++; 2040 len--; 2041 savebyte = NO_PENDING_BYTE; 2042 } 2043 2044 /* output contiguous words */ 2045 if (len > 1) { 2046 fe_outsw(sc, FE_BMPR8, (u_int16_t *)data, 2047 len >> 1); 2048 data += len & ~1; 2049 len &= 1; 2050 } 2051 2052 /* Save a remaining byte, if there is one. */ 2053 if (len > 0) 2054 savebyte = *data; 2055 } 2056 2057 /* Spit the last byte, if the length is odd. */ 2058 if (savebyte != NO_PENDING_BYTE) 2059 fe_outw(sc, FE_BMPR8, savebyte); 2060 } 2061 2062 /* Pad to the Ethernet minimum length, if the packet is too short. */ 2063 if (length < ETHER_MIN_LEN - ETHER_CRC_LEN) { 2064 if ((sc->proto_dlcr6 & FE_D6_SBW) == FE_D6_SBW_BYTE) 2065 { 2066 fe_outsb(sc, FE_BMPR8, padding, 2067 ETHER_MIN_LEN - ETHER_CRC_LEN - length); 2068 } 2069 else 2070 { 2071 fe_outsw(sc, FE_BMPR8, (u_int16_t *)padding, 2072 (ETHER_MIN_LEN - ETHER_CRC_LEN - length) >> 1); 2073 } 2074 } 2075} 2076 2077/* 2078 * Compute the multicast address filter from the 2079 * list of multicast addresses we need to listen to. 2080 */ 2081static struct fe_filter 2082fe_mcaf ( struct fe_softc *sc ) 2083{ 2084 int index; 2085 struct fe_filter filter; 2086 struct ifmultiaddr *ifma; 2087 2088 filter = fe_filter_nothing; 2089 if_maddr_rlock(sc->ifp); 2090 TAILQ_FOREACH(ifma, &sc->ifp->if_multiaddrs, ifma_link) { 2091 if (ifma->ifma_addr->sa_family != AF_LINK) 2092 continue; 2093 index = ether_crc32_le(LLADDR((struct sockaddr_dl *) 2094 ifma->ifma_addr), ETHER_ADDR_LEN) >> 26; 2095#ifdef FE_DEBUG 2096 if_printf(sc->ifp, "hash(%6D) == %d\n", 2097 enm->enm_addrlo , ":", index); 2098#endif 2099 2100 filter.data[index >> 3] |= 1 << (index & 7); 2101 } 2102 if_maddr_runlock(sc->ifp); 2103 return ( filter ); 2104} 2105 2106/* 2107 * Calculate a new "multicast packet filter" and put the 86960 2108 * receiver in appropriate mode. 2109 */ 2110static void 2111fe_setmode (struct fe_softc *sc) 2112{ 2113 2114 /* 2115 * If the interface is not running, we postpone the update 2116 * process for receive modes and multicast address filter 2117 * until the interface is restarted. It reduces some 2118 * complicated job on maintaining chip states. (Earlier versions 2119 * of this driver had a bug on that point...) 2120 * 2121 * To complete the trick, fe_init() calls fe_setmode() after 2122 * restarting the interface. 2123 */ 2124 if (!(sc->ifp->if_drv_flags & IFF_DRV_RUNNING)) 2125 return; 2126 2127 /* 2128 * Promiscuous mode is handled separately. 2129 */ 2130 if (sc->ifp->if_flags & IFF_PROMISC) { 2131 /* 2132 * Program 86960 to receive all packets on the segment 2133 * including those directed to other stations. 2134 * Multicast filter stored in MARs are ignored 2135 * under this setting, so we don't need to update it. 2136 * 2137 * Promiscuous mode in FreeBSD 2 is used solely by 2138 * BPF, and BPF only listens to valid (no error) packets. 2139 * So, we ignore erroneous ones even in this mode. 2140 * (Older versions of fe driver mistook the point.) 2141 */ 2142 fe_outb(sc, FE_DLCR5, 2143 sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1); 2144 sc->filter_change = 0; 2145 return; 2146 } 2147 2148 /* 2149 * Turn the chip to the normal (non-promiscuous) mode. 2150 */ 2151 fe_outb(sc, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1); 2152 2153 /* 2154 * Find the new multicast filter value. 2155 */ 2156 if (sc->ifp->if_flags & IFF_ALLMULTI) 2157 sc->filter = fe_filter_all; 2158 else 2159 sc->filter = fe_mcaf(sc); 2160 sc->filter_change = 1; 2161 2162 /* 2163 * We have to update the multicast filter in the 86960, A.S.A.P. 2164 * 2165 * Note that the DLC (Data Link Control unit, i.e. transmitter 2166 * and receiver) must be stopped when feeding the filter, and 2167 * DLC trashes all packets in both transmission and receive 2168 * buffers when stopped. 2169 * 2170 * To reduce the packet loss, we delay the filter update 2171 * process until buffers are empty. 2172 */ 2173 if (sc->txb_sched == 0 && sc->txb_count == 0 && 2174 !(fe_inb(sc, FE_DLCR1) & FE_D1_PKTRDY)) { 2175 /* 2176 * Buffers are (apparently) empty. Load 2177 * the new filter value into MARs now. 2178 */ 2179 fe_loadmar(sc); 2180 } else { 2181 /* 2182 * Buffers are not empty. Mark that we have to update 2183 * the MARs. The new filter will be loaded by feintr() 2184 * later. 2185 */ 2186 } 2187} 2188 2189/* 2190 * Load a new multicast address filter into MARs. 2191 * 2192 * The caller must have acquired the softc lock before fe_loadmar. 2193 * This function starts the DLC upon return. So it can be called only 2194 * when the chip is working, i.e., from the driver's point of view, when 2195 * a device is RUNNING. (I mistook the point in previous versions.) 2196 */ 2197static void 2198fe_loadmar (struct fe_softc * sc) 2199{ 2200 /* Stop the DLC (transmitter and receiver). */ 2201 DELAY(200); 2202 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_DISABLE); 2203 DELAY(200); 2204 2205 /* Select register bank 1 for MARs. */ 2206 fe_outb(sc, FE_DLCR7, sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); 2207 2208 /* Copy filter value into the registers. */ 2209 fe_outblk(sc, FE_MAR8, sc->filter.data, FE_FILTER_LEN); 2210 2211 /* Restore the bank selection for BMPRs (i.e., runtime registers). */ 2212 fe_outb(sc, FE_DLCR7, 2213 sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); 2214 2215 /* Restart the DLC. */ 2216 DELAY(200); 2217 fe_outb(sc, FE_DLCR6, sc->proto_dlcr6 | FE_D6_DLC_ENABLE); 2218 DELAY(200); 2219 2220 /* We have just updated the filter. */ 2221 sc->filter_change = 0; 2222} 2223 2224/* Change the media selection. */ 2225static int 2226fe_medchange (struct ifnet *ifp) 2227{ 2228 struct fe_softc *sc = (struct fe_softc *)ifp->if_softc; 2229 2230#ifdef DIAGNOSTIC 2231 /* If_media should not pass any request for a media which this 2232 interface doesn't support. */ 2233 int b; 2234 2235 for (b = 0; bit2media[b] != 0; b++) { 2236 if (bit2media[b] == sc->media.ifm_media) break; 2237 } 2238 if (((1 << b) & sc->mbitmap) == 0) { 2239 if_printf(sc->ifp, 2240 "got an unsupported media request (0x%x)\n", 2241 sc->media.ifm_media); 2242 return EINVAL; 2243 } 2244#endif 2245 2246 /* We don't actually change media when the interface is down. 2247 fe_init() will do the job, instead. Should we also wait 2248 until the transmission buffer being empty? Changing the 2249 media when we are sending a frame will cause two garbages 2250 on wires, one on old media and another on new. FIXME */ 2251 FE_LOCK(sc); 2252 if (sc->ifp->if_flags & IFF_UP) { 2253 if (sc->msel) sc->msel(sc); 2254 } 2255 FE_UNLOCK(sc); 2256 2257 return 0; 2258} 2259 2260/* I don't know how I can support media status callback... FIXME. */ 2261static void 2262fe_medstat (struct ifnet *ifp, struct ifmediareq *ifmr) 2263{ 2264 struct fe_softc *sc = ifp->if_softc; 2265 2266 ifmr->ifm_active = sc->media.ifm_media; 2267} 2268