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