| 1 | /* $NetBSD: mb86960.c,v 1.83 2016/06/10 13:27:13 ozaki-r Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * All Rights Reserved, Copyright (C) Fujitsu Limited 1995 |
| 5 | * |
| 6 | * This software may be used, modified, copied, distributed, and sold, in |
| 7 | * both source and binary form provided that the above copyright, these |
| 8 | * terms and the following disclaimer are retained. The name of the author |
| 9 | * and/or the contributor may not be used to endorse or promote products |
| 10 | * derived from this software without specific prior written permission. |
| 11 | * |
| 12 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND |
| 13 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 14 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 15 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE |
| 16 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 17 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 18 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION. |
| 19 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 20 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 21 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 22 | * SUCH DAMAGE. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * Portions copyright (C) 1993, David Greenman. This software may be used, |
| 27 | * modified, copied, distributed, and sold, in both source and binary form |
| 28 | * provided that the above copyright and these terms are retained. Under no |
| 29 | * circumstances is the author responsible for the proper functioning of this |
| 30 | * software, nor does the author assume any responsibility for damages |
| 31 | * incurred with its use. |
| 32 | */ |
| 33 | |
| 34 | #include <sys/cdefs.h> |
| 35 | __KERNEL_RCSID(0, "$NetBSD: mb86960.c,v 1.83 2016/06/10 13:27:13 ozaki-r Exp $" ); |
| 36 | |
| 37 | /* |
| 38 | * Device driver for Fujitsu MB86960A/MB86965A based Ethernet cards. |
| 39 | * Contributed by M.S. <seki@sysrap.cs.fujitsu.co.jp> |
| 40 | * |
| 41 | * This version is intended to be a generic template for various |
| 42 | * MB86960A/MB86965A based Ethernet cards. It currently supports |
| 43 | * Fujitsu FMV-180 series (i.e., FMV-181 and FMV-182) and Allied- |
| 44 | * Telesis AT1700 series and RE2000 series. There are some |
| 45 | * unnecessary hooks embedded, which are primarily intended to support |
| 46 | * other types of Ethernet cards, but the author is not sure whether |
| 47 | * they are useful. |
| 48 | */ |
| 49 | |
| 50 | #include "opt_inet.h" |
| 51 | |
| 52 | #include <sys/param.h> |
| 53 | #include <sys/systm.h> |
| 54 | #include <sys/errno.h> |
| 55 | #include <sys/ioctl.h> |
| 56 | #include <sys/mbuf.h> |
| 57 | #include <sys/socket.h> |
| 58 | #include <sys/syslog.h> |
| 59 | #include <sys/device.h> |
| 60 | #include <sys/rndsource.h> |
| 61 | |
| 62 | #include <net/if.h> |
| 63 | #include <net/if_dl.h> |
| 64 | #include <net/if_types.h> |
| 65 | #include <net/if_media.h> |
| 66 | #include <net/if_ether.h> |
| 67 | |
| 68 | #ifdef INET |
| 69 | #include <netinet/in.h> |
| 70 | #include <netinet/in_systm.h> |
| 71 | #include <netinet/in_var.h> |
| 72 | #include <netinet/ip.h> |
| 73 | #include <netinet/if_inarp.h> |
| 74 | #endif |
| 75 | |
| 76 | |
| 77 | #include <net/bpf.h> |
| 78 | #include <net/bpfdesc.h> |
| 79 | |
| 80 | #include <sys/bus.h> |
| 81 | |
| 82 | #include <dev/ic/mb86960reg.h> |
| 83 | #include <dev/ic/mb86960var.h> |
| 84 | |
| 85 | #ifndef __BUS_SPACE_HAS_STREAM_METHODS |
| 86 | #define bus_space_write_stream_2 bus_space_write_2 |
| 87 | #define bus_space_write_multi_stream_2 bus_space_write_multi_2 |
| 88 | #define bus_space_read_multi_stream_2 bus_space_read_multi_2 |
| 89 | #endif /* __BUS_SPACE_HAS_STREAM_METHODS */ |
| 90 | |
| 91 | /* Standard driver entry points. These can be static. */ |
| 92 | void mb86960_init(struct mb86960_softc *); |
| 93 | int mb86960_ioctl(struct ifnet *, u_long, void *); |
| 94 | void mb86960_start(struct ifnet *); |
| 95 | void mb86960_reset(struct mb86960_softc *); |
| 96 | void mb86960_watchdog(struct ifnet *); |
| 97 | |
| 98 | /* Local functions. Order of declaration is confused. FIXME. */ |
| 99 | int mb86960_get_packet(struct mb86960_softc *, u_int); |
| 100 | void mb86960_stop(struct mb86960_softc *); |
| 101 | void mb86960_tint(struct mb86960_softc *, uint8_t); |
| 102 | void mb86960_rint(struct mb86960_softc *, uint8_t); |
| 103 | static inline |
| 104 | void mb86960_xmit(struct mb86960_softc *); |
| 105 | void mb86960_write_mbufs(struct mb86960_softc *, struct mbuf *); |
| 106 | static inline |
| 107 | void mb86960_droppacket(struct mb86960_softc *); |
| 108 | void mb86960_getmcaf(struct ethercom *, uint8_t *); |
| 109 | void mb86960_setmode(struct mb86960_softc *); |
| 110 | void mb86960_loadmar(struct mb86960_softc *); |
| 111 | |
| 112 | int mb86960_mediachange(struct ifnet *); |
| 113 | void mb86960_mediastatus(struct ifnet *, struct ifmediareq *); |
| 114 | |
| 115 | #if FE_DEBUG >= 1 |
| 116 | void mb86960_dump(int, struct mb86960_softc *); |
| 117 | #endif |
| 118 | |
| 119 | void |
| 120 | mb86960_attach(struct mb86960_softc *sc, uint8_t *myea) |
| 121 | { |
| 122 | bus_space_tag_t bst = sc->sc_bst; |
| 123 | bus_space_handle_t bsh = sc->sc_bsh; |
| 124 | |
| 125 | /* Register values which depend on board design. */ |
| 126 | sc->proto_dlcr4 = FE_D4_LBC_DISABLE | FE_D4_CNTRL; |
| 127 | sc->proto_dlcr5 = 0; |
| 128 | sc->proto_dlcr7 = FE_D7_BYTSWP_LH; |
| 129 | if ((sc->sc_flags & FE_FLAGS_MB86960) != 0) |
| 130 | sc->proto_dlcr7 |= FE_D7_ED_TEST; /* XXX */ |
| 131 | sc->proto_bmpr13 = FE_B13_TPTYPE_UTP | FE_B13_PORT_AUTO; |
| 132 | |
| 133 | /* |
| 134 | * Program the 86960 as following defaults: |
| 135 | * SRAM: 32KB, 100ns, byte-wide access. |
| 136 | * Transmission buffer: 4KB x 2. |
| 137 | * System bus interface: 16 bits. |
| 138 | * These values except TXBSIZE should be modified as per |
| 139 | * sc_flags which is set in MD attachments, because they |
| 140 | * are hard-wired on the board. Modifying TXBSIZE will affect |
| 141 | * the driver performance. |
| 142 | */ |
| 143 | sc->proto_dlcr6 = FE_D6_BUFSIZ_32KB | FE_D6_TXBSIZ_2x4KB | |
| 144 | FE_D6_BBW_BYTE | FE_D6_SRAM_100ns; |
| 145 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) |
| 146 | sc->proto_dlcr6 |= FE_D6_SBW_BYTE; |
| 147 | if (sc->sc_flags & FE_FLAGS_SRAM_150ns) |
| 148 | sc->proto_dlcr6 &= ~FE_D6_SRAM_100ns; |
| 149 | |
| 150 | /* |
| 151 | * Minimum initialization of the hardware. |
| 152 | * We write into registers; hope I/O ports have no |
| 153 | * overlap with other boards. |
| 154 | */ |
| 155 | |
| 156 | /* Initialize 86960. */ |
| 157 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 158 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
| 159 | delay(200); |
| 160 | |
| 161 | #ifdef DIAGNOSTIC |
| 162 | if (myea == NULL) { |
| 163 | aprint_error_dev(sc->sc_dev, |
| 164 | "ethernet address shouldn't be NULL\n" ); |
| 165 | panic("NULL ethernet address" ); |
| 166 | } |
| 167 | #endif |
| 168 | memcpy(sc->sc_enaddr, myea, sizeof(sc->sc_enaddr)); |
| 169 | |
| 170 | /* Disable all interrupts. */ |
| 171 | bus_space_write_1(bst, bsh, FE_DLCR2, 0); |
| 172 | bus_space_write_1(bst, bsh, FE_DLCR3, 0); |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Install interface into kernel networking data structures |
| 177 | */ |
| 178 | void |
| 179 | mb86960_config(struct mb86960_softc *sc, int *media, int nmedia, int defmedia) |
| 180 | { |
| 181 | cfdata_t cf = device_cfdata(sc->sc_dev); |
| 182 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 183 | int i; |
| 184 | |
| 185 | /* Stop the 86960. */ |
| 186 | mb86960_stop(sc); |
| 187 | |
| 188 | /* Initialize ifnet structure. */ |
| 189 | strlcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ); |
| 190 | ifp->if_softc = sc; |
| 191 | ifp->if_start = mb86960_start; |
| 192 | ifp->if_ioctl = mb86960_ioctl; |
| 193 | ifp->if_watchdog = mb86960_watchdog; |
| 194 | ifp->if_flags = |
| 195 | IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; |
| 196 | IFQ_SET_READY(&ifp->if_snd); |
| 197 | |
| 198 | #if FE_DEBUG >= 3 |
| 199 | log(LOG_INFO, "%s: mb86960_config()\n" , device_xname(sc->sc_dev)); |
| 200 | mb86960_dump(LOG_INFO, sc); |
| 201 | #endif |
| 202 | |
| 203 | #if FE_SINGLE_TRANSMISSION |
| 204 | /* Override txb config to allocate minimum. */ |
| 205 | sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; |
| 206 | sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; |
| 207 | #endif |
| 208 | |
| 209 | /* Modify hardware config if it is requested. */ |
| 210 | if ((cf->cf_flags & FE_FLAGS_OVERRIDE_DLCR6) != 0) |
| 211 | sc->proto_dlcr6 = cf->cf_flags & FE_FLAGS_DLCR6_VALUE; |
| 212 | |
| 213 | /* Find TX buffer size, based on the hardware dependent proto. */ |
| 214 | switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { |
| 215 | case FE_D6_TXBSIZ_2x2KB: |
| 216 | sc->txb_size = 2048; |
| 217 | break; |
| 218 | case FE_D6_TXBSIZ_2x4KB: |
| 219 | sc->txb_size = 4096; |
| 220 | break; |
| 221 | case FE_D6_TXBSIZ_2x8KB: |
| 222 | sc->txb_size = 8192; |
| 223 | break; |
| 224 | default: |
| 225 | /* Oops, we can't work with single buffer configuration. */ |
| 226 | #if FE_DEBUG >= 2 |
| 227 | log(LOG_WARNING, "%s: strange TXBSIZ config; fixing\n" , |
| 228 | device_xname(sc->sc_dev)); |
| 229 | #endif |
| 230 | sc->proto_dlcr6 &= ~FE_D6_TXBSIZ; |
| 231 | sc->proto_dlcr6 |= FE_D6_TXBSIZ_2x2KB; |
| 232 | sc->txb_size = 2048; |
| 233 | break; |
| 234 | } |
| 235 | |
| 236 | /* Initialize media goo. */ |
| 237 | ifmedia_init(&sc->sc_media, 0, mb86960_mediachange, |
| 238 | mb86960_mediastatus); |
| 239 | if (media != NULL) { |
| 240 | for (i = 0; i < nmedia; i++) |
| 241 | ifmedia_add(&sc->sc_media, media[i], 0, NULL); |
| 242 | ifmedia_set(&sc->sc_media, defmedia); |
| 243 | } else { |
| 244 | ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); |
| 245 | ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); |
| 246 | } |
| 247 | |
| 248 | /* Attach the interface. */ |
| 249 | if_attach(ifp); |
| 250 | ether_ifattach(ifp, sc->sc_enaddr); |
| 251 | |
| 252 | rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), |
| 253 | RND_TYPE_NET, RND_FLAG_DEFAULT); |
| 254 | |
| 255 | /* Print additional info when attached. */ |
| 256 | aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n" , |
| 257 | ether_sprintf(sc->sc_enaddr)); |
| 258 | |
| 259 | #if FE_DEBUG >= 3 |
| 260 | { |
| 261 | int buf, txb, bbw, sbw, ram; |
| 262 | |
| 263 | buf = txb = bbw = sbw = ram = -1; |
| 264 | switch (sc->proto_dlcr6 & FE_D6_BUFSIZ) { |
| 265 | case FE_D6_BUFSIZ_8KB: |
| 266 | buf = 8; |
| 267 | break; |
| 268 | case FE_D6_BUFSIZ_16KB: |
| 269 | buf = 16; |
| 270 | break; |
| 271 | case FE_D6_BUFSIZ_32KB: |
| 272 | buf = 32; |
| 273 | break; |
| 274 | case FE_D6_BUFSIZ_64KB: |
| 275 | buf = 64; |
| 276 | break; |
| 277 | } |
| 278 | switch (sc->proto_dlcr6 & FE_D6_TXBSIZ) { |
| 279 | case FE_D6_TXBSIZ_2x2KB: |
| 280 | txb = 2; |
| 281 | break; |
| 282 | case FE_D6_TXBSIZ_2x4KB: |
| 283 | txb = 4; |
| 284 | break; |
| 285 | case FE_D6_TXBSIZ_2x8KB: |
| 286 | txb = 8; |
| 287 | break; |
| 288 | } |
| 289 | switch (sc->proto_dlcr6 & FE_D6_BBW) { |
| 290 | case FE_D6_BBW_BYTE: |
| 291 | bbw = 8; |
| 292 | break; |
| 293 | case FE_D6_BBW_WORD: |
| 294 | bbw = 16; |
| 295 | break; |
| 296 | } |
| 297 | switch (sc->proto_dlcr6 & FE_D6_SBW) { |
| 298 | case FE_D6_SBW_BYTE: |
| 299 | sbw = 8; |
| 300 | break; |
| 301 | case FE_D6_SBW_WORD: |
| 302 | sbw = 16; |
| 303 | break; |
| 304 | } |
| 305 | switch (sc->proto_dlcr6 & FE_D6_SRAM) { |
| 306 | case FE_D6_SRAM_100ns: |
| 307 | ram = 100; |
| 308 | break; |
| 309 | case FE_D6_SRAM_150ns: |
| 310 | ram = 150; |
| 311 | break; |
| 312 | } |
| 313 | aprint_debug_dev(sc->sc_dev, |
| 314 | "SRAM %dKB %dbit %dns, TXB %dKBx2, %dbit I/O\n" , |
| 315 | buf, bbw, ram, txb, sbw); |
| 316 | } |
| 317 | #endif |
| 318 | |
| 319 | /* The attach is successful. */ |
| 320 | sc->sc_stat |= FE_STAT_ATTACHED; |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * Media change callback. |
| 325 | */ |
| 326 | int |
| 327 | mb86960_mediachange(struct ifnet *ifp) |
| 328 | { |
| 329 | struct mb86960_softc *sc = ifp->if_softc; |
| 330 | |
| 331 | if (sc->sc_mediachange) |
| 332 | return (*sc->sc_mediachange)(sc); |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | /* |
| 337 | * Media status callback. |
| 338 | */ |
| 339 | void |
| 340 | mb86960_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) |
| 341 | { |
| 342 | struct mb86960_softc *sc = ifp->if_softc; |
| 343 | |
| 344 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0) { |
| 345 | ifmr->ifm_active = IFM_ETHER | IFM_NONE; |
| 346 | ifmr->ifm_status = 0; |
| 347 | return; |
| 348 | } |
| 349 | |
| 350 | if (sc->sc_mediastatus) |
| 351 | (*sc->sc_mediastatus)(sc, ifmr); |
| 352 | } |
| 353 | |
| 354 | /* |
| 355 | * Reset interface. |
| 356 | */ |
| 357 | void |
| 358 | mb86960_reset(struct mb86960_softc *sc) |
| 359 | { |
| 360 | int s; |
| 361 | |
| 362 | s = splnet(); |
| 363 | mb86960_stop(sc); |
| 364 | mb86960_init(sc); |
| 365 | splx(s); |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Stop everything on the interface. |
| 370 | * |
| 371 | * All buffered packets, both transmitting and receiving, |
| 372 | * if any, will be lost by stopping the interface. |
| 373 | */ |
| 374 | void |
| 375 | mb86960_stop(struct mb86960_softc *sc) |
| 376 | { |
| 377 | bus_space_tag_t bst = sc->sc_bst; |
| 378 | bus_space_handle_t bsh = sc->sc_bsh; |
| 379 | |
| 380 | #if FE_DEBUG >= 3 |
| 381 | log(LOG_INFO, "%s: top of mb86960_stop()\n" , device_xname(sc->sc_dev)); |
| 382 | mb86960_dump(LOG_INFO, sc); |
| 383 | #endif |
| 384 | |
| 385 | /* Disable interrupts. */ |
| 386 | bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); |
| 387 | bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); |
| 388 | |
| 389 | /* Stop interface hardware. */ |
| 390 | delay(200); |
| 391 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 392 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
| 393 | delay(200); |
| 394 | |
| 395 | /* Clear all interrupt status. */ |
| 396 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); |
| 397 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); |
| 398 | |
| 399 | /* Put the chip in stand-by mode. */ |
| 400 | delay(200); |
| 401 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 402 | sc->proto_dlcr7 | FE_D7_POWER_DOWN); |
| 403 | delay(200); |
| 404 | |
| 405 | /* MAR loading can be delayed. */ |
| 406 | sc->filter_change = 0; |
| 407 | |
| 408 | /* Call a hook. */ |
| 409 | if (sc->stop_card) |
| 410 | (*sc->stop_card)(sc); |
| 411 | |
| 412 | #if FE_DEBUG >= 3 |
| 413 | log(LOG_INFO, "%s: end of mb86960_stop()\n" , device_xname(sc->sc_dev)); |
| 414 | mb86960_dump(LOG_INFO, sc); |
| 415 | #endif |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Device timeout/watchdog routine. Entered if the device neglects to |
| 420 | * generate an interrupt after a transmit has been started on it. |
| 421 | */ |
| 422 | void |
| 423 | mb86960_watchdog(struct ifnet *ifp) |
| 424 | { |
| 425 | struct mb86960_softc *sc = ifp->if_softc; |
| 426 | |
| 427 | log(LOG_ERR, "%s: device timeout\n" , device_xname(sc->sc_dev)); |
| 428 | #if FE_DEBUG >= 3 |
| 429 | mb86960_dump(LOG_INFO, sc); |
| 430 | #endif |
| 431 | |
| 432 | /* Record how many packets are lost by this accident. */ |
| 433 | sc->sc_ec.ec_if.if_oerrors += sc->txb_sched + sc->txb_count; |
| 434 | |
| 435 | mb86960_reset(sc); |
| 436 | } |
| 437 | |
| 438 | /* |
| 439 | * Drop (skip) a packet from receive buffer in 86960 memory. |
| 440 | */ |
| 441 | static inline void |
| 442 | mb86960_droppacket(struct mb86960_softc *sc) |
| 443 | { |
| 444 | bus_space_tag_t bst = sc->sc_bst; |
| 445 | bus_space_handle_t bsh = sc->sc_bsh; |
| 446 | |
| 447 | bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER | FE_B14_SKIP); |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Initialize device. |
| 452 | */ |
| 453 | void |
| 454 | mb86960_init(struct mb86960_softc *sc) |
| 455 | { |
| 456 | bus_space_tag_t bst = sc->sc_bst; |
| 457 | bus_space_handle_t bsh = sc->sc_bsh; |
| 458 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 459 | int i; |
| 460 | |
| 461 | #if FE_DEBUG >= 3 |
| 462 | log(LOG_INFO, "%s: top of mb86960_init()\n" , device_xname(sc->sc_dev)); |
| 463 | mb86960_dump(LOG_INFO, sc); |
| 464 | #endif |
| 465 | |
| 466 | /* Reset transmitter flags. */ |
| 467 | ifp->if_flags &= ~IFF_OACTIVE; |
| 468 | ifp->if_timer = 0; |
| 469 | |
| 470 | sc->txb_free = sc->txb_size; |
| 471 | sc->txb_count = 0; |
| 472 | sc->txb_sched = 0; |
| 473 | |
| 474 | /* Do any card-specific initialization, if applicable. */ |
| 475 | if (sc->init_card) |
| 476 | (*sc->init_card)(sc); |
| 477 | |
| 478 | #if FE_DEBUG >= 3 |
| 479 | log(LOG_INFO, "%s: after init hook\n" , device_xname(sc->sc_dev)); |
| 480 | mb86960_dump(LOG_INFO, sc); |
| 481 | #endif |
| 482 | |
| 483 | /* |
| 484 | * Make sure to disable the chip, also. |
| 485 | * This may also help re-programming the chip after |
| 486 | * hot insertion of PCMCIAs. |
| 487 | */ |
| 488 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 489 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
| 490 | delay(200); |
| 491 | |
| 492 | /* Power up the chip and select register bank for DLCRs. */ |
| 493 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 494 | sc->proto_dlcr7 | FE_D7_RBS_DLCR | FE_D7_POWER_UP); |
| 495 | delay(200); |
| 496 | |
| 497 | /* Feed the station address. */ |
| 498 | bus_space_write_region_1(bst, bsh, FE_DLCR8, |
| 499 | sc->sc_enaddr, ETHER_ADDR_LEN); |
| 500 | |
| 501 | /* Select the BMPR bank for runtime register access. */ |
| 502 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 503 | sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); |
| 504 | |
| 505 | /* Initialize registers. */ |
| 506 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ |
| 507 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ |
| 508 | bus_space_write_1(bst, bsh, FE_DLCR2, 0x00); |
| 509 | bus_space_write_1(bst, bsh, FE_DLCR3, 0x00); |
| 510 | bus_space_write_1(bst, bsh, FE_DLCR4, sc->proto_dlcr4); |
| 511 | bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5); |
| 512 | bus_space_write_1(bst, bsh, FE_BMPR10, 0x00); |
| 513 | bus_space_write_1(bst, bsh, FE_BMPR11, FE_B11_CTRL_SKIP); |
| 514 | bus_space_write_1(bst, bsh, FE_BMPR12, 0x00); |
| 515 | bus_space_write_1(bst, bsh, FE_BMPR13, sc->proto_bmpr13); |
| 516 | bus_space_write_1(bst, bsh, FE_BMPR14, FE_B14_FILTER); |
| 517 | bus_space_write_1(bst, bsh, FE_BMPR15, 0x00); |
| 518 | |
| 519 | #if FE_DEBUG >= 3 |
| 520 | log(LOG_INFO, "%s: just before enabling DLC\n" , |
| 521 | device_xname(sc->sc_dev)); |
| 522 | mb86960_dump(LOG_INFO, sc); |
| 523 | #endif |
| 524 | |
| 525 | /* Enable interrupts. */ |
| 526 | bus_space_write_1(bst, bsh, FE_DLCR2, FE_TMASK); |
| 527 | bus_space_write_1(bst, bsh, FE_DLCR3, FE_RMASK); |
| 528 | |
| 529 | /* Enable transmitter and receiver. */ |
| 530 | delay(200); |
| 531 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 532 | sc->proto_dlcr6 | FE_D6_DLC_ENABLE); |
| 533 | delay(200); |
| 534 | |
| 535 | #if FE_DEBUG >= 3 |
| 536 | log(LOG_INFO, "%s: just after enabling DLC\n" , |
| 537 | device_xname(sc->sc_dev)); |
| 538 | mb86960_dump(LOG_INFO, sc); |
| 539 | #endif |
| 540 | |
| 541 | /* |
| 542 | * Make sure to empty the receive buffer. |
| 543 | * |
| 544 | * This may be redundant, but *if* the receive buffer were full |
| 545 | * at this point, the driver would hang. I have experienced |
| 546 | * some strange hangups just after UP. I hope the following |
| 547 | * code solve the problem. |
| 548 | * |
| 549 | * I have changed the order of hardware initialization. |
| 550 | * I think the receive buffer cannot have any packets at this |
| 551 | * point in this version. The following code *must* be |
| 552 | * redundant now. FIXME. |
| 553 | */ |
| 554 | for (i = 0; i < FE_MAX_RECV_COUNT; i++) { |
| 555 | if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) |
| 556 | break; |
| 557 | mb86960_droppacket(sc); |
| 558 | } |
| 559 | #if FE_DEBUG >= 1 |
| 560 | if (i >= FE_MAX_RECV_COUNT) |
| 561 | log(LOG_ERR, "%s: cannot empty receive buffer\n" , |
| 562 | device_xname(sc->sc_dev)); |
| 563 | #endif |
| 564 | #if FE_DEBUG >= 3 |
| 565 | if (i < FE_MAX_RECV_COUNT) |
| 566 | log(LOG_INFO, "%s: receive buffer emptied (%d)\n" , |
| 567 | device_xname(sc->sc_dev), i); |
| 568 | #endif |
| 569 | |
| 570 | #if FE_DEBUG >= 3 |
| 571 | log(LOG_INFO, "%s: after ERB loop\n" , device_xname(sc->sc_dev)); |
| 572 | mb86960_dump(LOG_INFO, sc); |
| 573 | #endif |
| 574 | |
| 575 | /* Do we need this here? */ |
| 576 | bus_space_write_1(bst, bsh, FE_DLCR0, 0xFF); /* Clear all bits. */ |
| 577 | bus_space_write_1(bst, bsh, FE_DLCR1, 0xFF); /* ditto. */ |
| 578 | |
| 579 | #if FE_DEBUG >= 3 |
| 580 | log(LOG_INFO, "%s: after FIXME\n" , device_xname(sc->sc_dev)); |
| 581 | mb86960_dump(LOG_INFO, sc); |
| 582 | #endif |
| 583 | |
| 584 | /* Set 'running' flag. */ |
| 585 | ifp->if_flags |= IFF_RUNNING; |
| 586 | |
| 587 | /* |
| 588 | * At this point, the interface is runnung properly, |
| 589 | * except that it receives *no* packets. we then call |
| 590 | * mb86960_setmode() to tell the chip what packets to be |
| 591 | * received, based on the if_flags and multicast group |
| 592 | * list. It completes the initialization process. |
| 593 | */ |
| 594 | mb86960_setmode(sc); |
| 595 | |
| 596 | #if FE_DEBUG >= 3 |
| 597 | log(LOG_INFO, "%s: after setmode\n" , device_xname(sc->sc_dev)); |
| 598 | mb86960_dump(LOG_INFO, sc); |
| 599 | #endif |
| 600 | |
| 601 | /* ...and attempt to start output. */ |
| 602 | mb86960_start(ifp); |
| 603 | |
| 604 | #if FE_DEBUG >= 3 |
| 605 | log(LOG_INFO, "%s: end of mb86960_init()\n" , device_xname(sc->sc_dev)); |
| 606 | mb86960_dump(LOG_INFO, sc); |
| 607 | #endif |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * This routine actually starts the transmission on the interface |
| 612 | */ |
| 613 | static inline void |
| 614 | mb86960_xmit(struct mb86960_softc *sc) |
| 615 | { |
| 616 | bus_space_tag_t bst = sc->sc_bst; |
| 617 | bus_space_handle_t bsh = sc->sc_bsh; |
| 618 | |
| 619 | /* |
| 620 | * Set a timer just in case we never hear from the board again. |
| 621 | * We use longer timeout for multiple packet transmission. |
| 622 | * I'm not sure this timer value is appropriate. FIXME. |
| 623 | */ |
| 624 | sc->sc_ec.ec_if.if_timer = 1 + sc->txb_count; |
| 625 | |
| 626 | /* Update txb variables. */ |
| 627 | sc->txb_sched = sc->txb_count; |
| 628 | sc->txb_count = 0; |
| 629 | sc->txb_free = sc->txb_size; |
| 630 | |
| 631 | #if FE_DELAYED_PADDING |
| 632 | /* Omit the postponed padding process. */ |
| 633 | sc->txb_padding = 0; |
| 634 | #endif |
| 635 | |
| 636 | /* Start transmitter, passing packets in TX buffer. */ |
| 637 | bus_space_write_1(bst, bsh, FE_BMPR10, sc->txb_sched | FE_B10_START); |
| 638 | } |
| 639 | |
| 640 | /* |
| 641 | * Start output on interface. |
| 642 | * We make two assumptions here: |
| 643 | * 1) that the current priority is set to splnet _before_ this code |
| 644 | * is called *and* is returned to the appropriate priority after |
| 645 | * return |
| 646 | * 2) that the IFF_OACTIVE flag is checked before this code is called |
| 647 | * (i.e. that the output part of the interface is idle) |
| 648 | */ |
| 649 | void |
| 650 | mb86960_start(struct ifnet *ifp) |
| 651 | { |
| 652 | struct mb86960_softc *sc = ifp->if_softc; |
| 653 | struct mbuf *m; |
| 654 | |
| 655 | #if FE_DEBUG >= 1 |
| 656 | /* Just a sanity check. */ |
| 657 | if ((sc->txb_count == 0) != (sc->txb_free == sc->txb_size)) { |
| 658 | /* |
| 659 | * Txb_count and txb_free co-works to manage the |
| 660 | * transmission buffer. Txb_count keeps track of the |
| 661 | * used potion of the buffer, while txb_free does unused |
| 662 | * potion. So, as long as the driver runs properly, |
| 663 | * txb_count is zero if and only if txb_free is same |
| 664 | * as txb_size (which represents whole buffer.) |
| 665 | */ |
| 666 | log(LOG_ERR, "%s: inconsistent txb variables (%d, %d)\n" , |
| 667 | device_xname(sc->sc_dev), sc->txb_count, sc->txb_free); |
| 668 | /* |
| 669 | * So, what should I do, then? |
| 670 | * |
| 671 | * We now know txb_count and txb_free contradicts. We |
| 672 | * cannot, however, tell which is wrong. More |
| 673 | * over, we cannot peek 86960 transmission buffer or |
| 674 | * reset the transmission buffer. (In fact, we can |
| 675 | * reset the entire interface. I don't want to do it.) |
| 676 | * |
| 677 | * If txb_count is incorrect, leaving it as is will cause |
| 678 | * sending of garbage after the next interrupt. We have to |
| 679 | * avoid it. Hence, we reset the txb_count here. If |
| 680 | * txb_free was incorrect, resetting txb_count just loose |
| 681 | * some packets. We can live with it. |
| 682 | */ |
| 683 | sc->txb_count = 0; |
| 684 | } |
| 685 | #endif |
| 686 | |
| 687 | #if FE_DEBUG >= 1 |
| 688 | /* |
| 689 | * First, see if there are buffered packets and an idle |
| 690 | * transmitter - should never happen at this point. |
| 691 | */ |
| 692 | if ((sc->txb_count > 0) && (sc->txb_sched == 0)) { |
| 693 | log(LOG_ERR, "%s: transmitter idle with %d buffered packets\n" , |
| 694 | device_xname(sc->sc_dev), sc->txb_count); |
| 695 | mb86960_xmit(sc); |
| 696 | } |
| 697 | #endif |
| 698 | |
| 699 | /* |
| 700 | * Stop accepting more transmission packets temporarily, when |
| 701 | * a filter change request is delayed. Updating the MARs on |
| 702 | * 86960 flushes the transmisstion buffer, so it is delayed |
| 703 | * until all buffered transmission packets have been sent |
| 704 | * out. |
| 705 | */ |
| 706 | if (sc->filter_change) { |
| 707 | /* |
| 708 | * Filter change request is delayed only when the DLC is |
| 709 | * working. DLC soon raise an interrupt after finishing |
| 710 | * the work. |
| 711 | */ |
| 712 | goto indicate_active; |
| 713 | } |
| 714 | |
| 715 | for (;;) { |
| 716 | /* |
| 717 | * See if there is room to put another packet in the buffer. |
| 718 | * We *could* do better job by peeking the send queue to |
| 719 | * know the length of the next packet. Current version just |
| 720 | * tests against the worst case (i.e., longest packet). FIXME. |
| 721 | * |
| 722 | * When adding the packet-peek feature, don't forget adding a |
| 723 | * test on txb_count against QUEUEING_MAX. |
| 724 | * There is a little chance the packet count exceeds |
| 725 | * the limit. Assume transmission buffer is 8KB (2x8KB |
| 726 | * configuration) and an application sends a bunch of small |
| 727 | * (i.e., minimum packet sized) packets rapidly. An 8KB |
| 728 | * buffer can hold 130 blocks of 62 bytes long... |
| 729 | */ |
| 730 | if (sc->txb_free < |
| 731 | (ETHER_MAX_LEN - ETHER_CRC_LEN) + FE_TXLEN_SIZE) { |
| 732 | /* No room. */ |
| 733 | goto indicate_active; |
| 734 | } |
| 735 | |
| 736 | #if FE_SINGLE_TRANSMISSION |
| 737 | if (sc->txb_count > 0) { |
| 738 | /* Just one packet per a transmission buffer. */ |
| 739 | goto indicate_active; |
| 740 | } |
| 741 | #endif |
| 742 | |
| 743 | /* |
| 744 | * Get the next mbuf chain for a packet to send. |
| 745 | */ |
| 746 | IFQ_DEQUEUE(&ifp->if_snd, m); |
| 747 | if (m == 0) { |
| 748 | /* No more packets to send. */ |
| 749 | goto indicate_inactive; |
| 750 | } |
| 751 | |
| 752 | /* Tap off here if there is a BPF listener. */ |
| 753 | bpf_mtap(ifp, m); |
| 754 | |
| 755 | /* |
| 756 | * Copy the mbuf chain into the transmission buffer. |
| 757 | * txb_* variables are updated as necessary. |
| 758 | */ |
| 759 | mb86960_write_mbufs(sc, m); |
| 760 | |
| 761 | m_freem(m); |
| 762 | |
| 763 | /* Start transmitter if it's idle. */ |
| 764 | if (sc->txb_sched == 0) |
| 765 | mb86960_xmit(sc); |
| 766 | } |
| 767 | |
| 768 | indicate_inactive: |
| 769 | /* |
| 770 | * We are using the !OACTIVE flag to indicate to |
| 771 | * the outside world that we can accept an |
| 772 | * additional packet rather than that the |
| 773 | * transmitter is _actually_ active. Indeed, the |
| 774 | * transmitter may be active, but if we haven't |
| 775 | * filled all the buffers with data then we still |
| 776 | * want to accept more. |
| 777 | */ |
| 778 | ifp->if_flags &= ~IFF_OACTIVE; |
| 779 | return; |
| 780 | |
| 781 | indicate_active: |
| 782 | /* |
| 783 | * The transmitter is active, and there are no room for |
| 784 | * more outgoing packets in the transmission buffer. |
| 785 | */ |
| 786 | ifp->if_flags |= IFF_OACTIVE; |
| 787 | return; |
| 788 | } |
| 789 | |
| 790 | /* |
| 791 | * Transmission interrupt handler |
| 792 | * The control flow of this function looks silly. FIXME. |
| 793 | */ |
| 794 | void |
| 795 | mb86960_tint(struct mb86960_softc *sc, uint8_t tstat) |
| 796 | { |
| 797 | bus_space_tag_t bst = sc->sc_bst; |
| 798 | bus_space_handle_t bsh = sc->sc_bsh; |
| 799 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 800 | int left; |
| 801 | int col; |
| 802 | |
| 803 | /* |
| 804 | * Handle "excessive collision" interrupt. |
| 805 | */ |
| 806 | if (tstat & FE_D0_COLL16) { |
| 807 | /* |
| 808 | * Find how many packets (including this collided one) |
| 809 | * are left unsent in transmission buffer. |
| 810 | */ |
| 811 | left = bus_space_read_1(bst, bsh, FE_BMPR10); |
| 812 | |
| 813 | #if FE_DEBUG >= 2 |
| 814 | log(LOG_WARNING, "%s: excessive collision (%d/%d)\n" , |
| 815 | device_xname(sc->sc_dev), left, sc->txb_sched); |
| 816 | #endif |
| 817 | #if FE_DEBUG >= 3 |
| 818 | mb86960_dump(LOG_INFO, sc); |
| 819 | #endif |
| 820 | |
| 821 | /* |
| 822 | * Update statistics. |
| 823 | */ |
| 824 | ifp->if_collisions += 16; |
| 825 | ifp->if_oerrors++; |
| 826 | ifp->if_opackets += sc->txb_sched - left; |
| 827 | |
| 828 | /* |
| 829 | * Collision statistics has been updated. |
| 830 | * Clear the collision flag on 86960 now to avoid confusion. |
| 831 | */ |
| 832 | bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); |
| 833 | |
| 834 | /* |
| 835 | * Restart transmitter, skipping the |
| 836 | * collided packet. |
| 837 | * |
| 838 | * We *must* skip the packet to keep network running |
| 839 | * properly. Excessive collision error is an |
| 840 | * indication of the network overload. If we |
| 841 | * tried sending the same packet after excessive |
| 842 | * collision, the network would be filled with |
| 843 | * out-of-time packets. Packets belonging |
| 844 | * to reliable transport (such as TCP) are resent |
| 845 | * by some upper layer. |
| 846 | */ |
| 847 | bus_space_write_1(bst, bsh, FE_BMPR11, |
| 848 | FE_B11_CTRL_SKIP | FE_B11_MODE1); |
| 849 | sc->txb_sched = left - 1; |
| 850 | } |
| 851 | |
| 852 | /* |
| 853 | * Handle "transmission complete" interrupt. |
| 854 | */ |
| 855 | if (tstat & FE_D0_TXDONE) { |
| 856 | /* |
| 857 | * Add in total number of collisions on last |
| 858 | * transmission. We also clear "collision occurred" flag |
| 859 | * here. |
| 860 | * |
| 861 | * 86960 has a design flow on collision count on multiple |
| 862 | * packet transmission. When we send two or more packets |
| 863 | * with one start command (that's what we do when the |
| 864 | * transmission queue is clauded), 86960 informs us number |
| 865 | * of collisions occurred on the last packet on the |
| 866 | * transmission only. Number of collisions on previous |
| 867 | * packets are lost. I have told that the fact is clearly |
| 868 | * stated in the Fujitsu document. |
| 869 | * |
| 870 | * I considered not to mind it seriously. Collision |
| 871 | * count is not so important, anyway. Any comments? FIXME. |
| 872 | */ |
| 873 | |
| 874 | if (bus_space_read_1(bst, bsh, FE_DLCR0) & FE_D0_COLLID) { |
| 875 | /* Clear collision flag. */ |
| 876 | bus_space_write_1(bst, bsh, FE_DLCR0, FE_D0_COLLID); |
| 877 | |
| 878 | /* Extract collision count from 86960. */ |
| 879 | col = bus_space_read_1(bst, bsh, FE_DLCR4) & FE_D4_COL; |
| 880 | if (col == 0) { |
| 881 | /* |
| 882 | * Status register indicates collisions, |
| 883 | * while the collision count is zero. |
| 884 | * This can happen after multiple packet |
| 885 | * transmission, indicating that one or more |
| 886 | * previous packet(s) had been collided. |
| 887 | * |
| 888 | * Since the accurate number of collisions |
| 889 | * has been lost, we just guess it as 1; |
| 890 | * Am I too optimistic? FIXME. |
| 891 | */ |
| 892 | col = 1; |
| 893 | } else |
| 894 | col >>= FE_D4_COL_SHIFT; |
| 895 | ifp->if_collisions += col; |
| 896 | #if FE_DEBUG >= 4 |
| 897 | log(LOG_WARNING, "%s: %d collision%s (%d)\n" , |
| 898 | device_xname(sc->sc_dev), col, col == 1 ? "" : "s" , |
| 899 | sc->txb_sched); |
| 900 | #endif |
| 901 | } |
| 902 | |
| 903 | /* |
| 904 | * Update total number of successfully |
| 905 | * transmitted packets. |
| 906 | */ |
| 907 | ifp->if_opackets += sc->txb_sched; |
| 908 | sc->txb_sched = 0; |
| 909 | } |
| 910 | |
| 911 | if (sc->txb_sched == 0) { |
| 912 | /* |
| 913 | * The transmitter is no more active. |
| 914 | * Reset output active flag and watchdog timer. |
| 915 | */ |
| 916 | ifp->if_flags &= ~IFF_OACTIVE; |
| 917 | ifp->if_timer = 0; |
| 918 | |
| 919 | /* |
| 920 | * If more data is ready to transmit in the buffer, start |
| 921 | * transmitting them. Otherwise keep transmitter idle, |
| 922 | * even if more data is queued. This gives receive |
| 923 | * process a slight priority. |
| 924 | */ |
| 925 | if (sc->txb_count > 0) |
| 926 | mb86960_xmit(sc); |
| 927 | } |
| 928 | } |
| 929 | |
| 930 | /* |
| 931 | * Ethernet interface receiver interrupt. |
| 932 | */ |
| 933 | void |
| 934 | mb86960_rint(struct mb86960_softc *sc, uint8_t rstat) |
| 935 | { |
| 936 | bus_space_tag_t bst = sc->sc_bst; |
| 937 | bus_space_handle_t bsh = sc->sc_bsh; |
| 938 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 939 | u_int status, len; |
| 940 | int i; |
| 941 | |
| 942 | /* |
| 943 | * Update statistics if this interrupt is caused by an error. |
| 944 | */ |
| 945 | if (rstat & (FE_D1_OVRFLO | FE_D1_CRCERR | FE_D1_ALGERR | |
| 946 | FE_D1_SRTPKT)) { |
| 947 | #if FE_DEBUG >= 3 |
| 948 | char sbuf[sizeof(FE_D1_ERRBITS) + 64]; |
| 949 | |
| 950 | snprintb(sbuf, sizeof(sbuf), FE_D1_ERRBITS, rstat); |
| 951 | log(LOG_WARNING, "%s: receive error: %s\n" , |
| 952 | device_xname(sc->sc_dev), sbuf); |
| 953 | #endif |
| 954 | ifp->if_ierrors++; |
| 955 | } |
| 956 | |
| 957 | /* |
| 958 | * MB86960 has a flag indicating "receive queue empty." |
| 959 | * We just loop checking the flag to pull out all received |
| 960 | * packets. |
| 961 | * |
| 962 | * We limit the number of iterrations to avoid infinite loop. |
| 963 | * It can be caused by a very slow CPU (some broken |
| 964 | * peripheral may insert incredible number of wait cycles) |
| 965 | * or, worse, by a broken MB86960 chip. |
| 966 | */ |
| 967 | for (i = 0; i < FE_MAX_RECV_COUNT; i++) { |
| 968 | /* Stop the iterration if 86960 indicates no packets. */ |
| 969 | if (bus_space_read_1(bst, bsh, FE_DLCR5) & FE_D5_BUFEMP) |
| 970 | break; |
| 971 | |
| 972 | /* |
| 973 | * Extract receive packet status from the receive |
| 974 | * packet header. |
| 975 | */ |
| 976 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 977 | status = bus_space_read_1(bst, bsh, FE_BMPR8); |
| 978 | (void)bus_space_read_1(bst, bsh, FE_BMPR8); |
| 979 | } else |
| 980 | status = bus_space_read_2(bst, bsh, FE_BMPR8); |
| 981 | |
| 982 | #if FE_DEBUG >= 4 |
| 983 | log(LOG_INFO, "%s: receive status = %02x\n" , |
| 984 | device_xname(sc->sc_dev), status); |
| 985 | #endif |
| 986 | |
| 987 | /* |
| 988 | * If there was an error, update statistics and drop |
| 989 | * the packet, unless the interface is in promiscuous |
| 990 | * mode. |
| 991 | */ |
| 992 | if ((status & FE_RXSTAT_GOODPKT) == 0) { |
| 993 | if ((ifp->if_flags & IFF_PROMISC) == 0) { |
| 994 | ifp->if_ierrors++; |
| 995 | mb86960_droppacket(sc); |
| 996 | continue; |
| 997 | } |
| 998 | } |
| 999 | |
| 1000 | /* |
| 1001 | * Extract the packet length from the receive packet header. |
| 1002 | * It is a sum of a header (14 bytes) and a payload. |
| 1003 | * CRC has been stripped off by the 86960. |
| 1004 | */ |
| 1005 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 1006 | len = bus_space_read_1(bst, bsh, FE_BMPR8); |
| 1007 | len |= bus_space_read_1(bst, bsh, FE_BMPR8) << 8; |
| 1008 | } else |
| 1009 | len = bus_space_read_2(bst, bsh, FE_BMPR8); |
| 1010 | |
| 1011 | /* |
| 1012 | * MB86965 checks the packet length and drop big packet |
| 1013 | * before passing it to us. There are no chance we can |
| 1014 | * get [crufty] packets. Hence, if the length exceeds |
| 1015 | * the specified limit, it means some serious failure, |
| 1016 | * such as out-of-sync on receive buffer management. |
| 1017 | * |
| 1018 | * Is this statement true? FIXME. |
| 1019 | */ |
| 1020 | if (len > (ETHER_MAX_LEN - ETHER_CRC_LEN) || |
| 1021 | len < ETHER_HDR_LEN) { |
| 1022 | #if FE_DEBUG >= 2 |
| 1023 | log(LOG_WARNING, |
| 1024 | "%s: received a %s packet? (%u bytes)\n" , |
| 1025 | device_xname(sc->sc_dev), |
| 1026 | len < ETHER_HDR_LEN ? "partial" : "big" , len); |
| 1027 | #endif |
| 1028 | ifp->if_ierrors++; |
| 1029 | mb86960_droppacket(sc); |
| 1030 | continue; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * Check for a short (RUNT) packet. We *do* check |
| 1035 | * but do nothing other than print a message. |
| 1036 | * Short packets are illegal, but does nothing bad |
| 1037 | * if it carries data for upper layer. |
| 1038 | */ |
| 1039 | #if FE_DEBUG >= 2 |
| 1040 | if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) { |
| 1041 | log(LOG_WARNING, |
| 1042 | "%s: received a short packet? (%u bytes)\n" , |
| 1043 | device_xname(sc->sc_dev), len); |
| 1044 | } |
| 1045 | #endif |
| 1046 | |
| 1047 | /* |
| 1048 | * Go get a packet. |
| 1049 | */ |
| 1050 | if (mb86960_get_packet(sc, len) == 0) { |
| 1051 | /* Skip a packet, updating statistics. */ |
| 1052 | #if FE_DEBUG >= 2 |
| 1053 | log(LOG_WARNING, |
| 1054 | "%s: out of mbufs; dropping packet (%u bytes)\n" , |
| 1055 | device_xname(sc->sc_dev), len); |
| 1056 | #endif |
| 1057 | ifp->if_ierrors++; |
| 1058 | mb86960_droppacket(sc); |
| 1059 | |
| 1060 | /* |
| 1061 | * We stop receiving packets, even if there are |
| 1062 | * more in the buffer. We hope we can get more |
| 1063 | * mbufs next time. |
| 1064 | */ |
| 1065 | return; |
| 1066 | } |
| 1067 | |
| 1068 | /* Successfully received a packet. Update stat. */ |
| 1069 | ifp->if_ipackets++; |
| 1070 | } |
| 1071 | } |
| 1072 | |
| 1073 | /* |
| 1074 | * Ethernet interface interrupt processor |
| 1075 | */ |
| 1076 | int |
| 1077 | mb86960_intr(void *arg) |
| 1078 | { |
| 1079 | struct mb86960_softc *sc = arg; |
| 1080 | bus_space_tag_t bst = sc->sc_bst; |
| 1081 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1082 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1083 | uint8_t tstat, rstat; |
| 1084 | |
| 1085 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0 || |
| 1086 | !device_is_active(sc->sc_dev)) |
| 1087 | return 0; |
| 1088 | |
| 1089 | #if FE_DEBUG >= 4 |
| 1090 | log(LOG_INFO, "%s: mb86960_intr()\n" , device_xname(sc->sc_dev)); |
| 1091 | mb86960_dump(LOG_INFO, sc); |
| 1092 | #endif |
| 1093 | |
| 1094 | /* |
| 1095 | * Get interrupt conditions, masking unneeded flags. |
| 1096 | */ |
| 1097 | tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; |
| 1098 | rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; |
| 1099 | if (tstat == 0 && rstat == 0) |
| 1100 | return 0; |
| 1101 | |
| 1102 | /* |
| 1103 | * Loop until there are no more new interrupt conditions. |
| 1104 | */ |
| 1105 | for (;;) { |
| 1106 | /* |
| 1107 | * Reset the conditions we are acknowledging. |
| 1108 | */ |
| 1109 | bus_space_write_1(bst, bsh, FE_DLCR0, tstat); |
| 1110 | bus_space_write_1(bst, bsh, FE_DLCR1, rstat); |
| 1111 | |
| 1112 | /* |
| 1113 | * Handle transmitter interrupts. Handle these first because |
| 1114 | * the receiver will reset the board under some conditions. |
| 1115 | */ |
| 1116 | if (tstat != 0) |
| 1117 | mb86960_tint(sc, tstat); |
| 1118 | |
| 1119 | /* |
| 1120 | * Handle receiver interrupts. |
| 1121 | */ |
| 1122 | if (rstat != 0) |
| 1123 | mb86960_rint(sc, rstat); |
| 1124 | |
| 1125 | /* |
| 1126 | * Update the multicast address filter if it is |
| 1127 | * needed and possible. We do it now, because |
| 1128 | * we can make sure the transmission buffer is empty, |
| 1129 | * and there is a good chance that the receive queue |
| 1130 | * is empty. It will minimize the possibility of |
| 1131 | * packet lossage. |
| 1132 | */ |
| 1133 | if (sc->filter_change && |
| 1134 | sc->txb_count == 0 && sc->txb_sched == 0) { |
| 1135 | mb86960_loadmar(sc); |
| 1136 | ifp->if_flags &= ~IFF_OACTIVE; |
| 1137 | } |
| 1138 | |
| 1139 | /* |
| 1140 | * If it looks like the transmitter can take more data, |
| 1141 | * attempt to start output on the interface. This is done |
| 1142 | * after handling the receiver interrupt to give the |
| 1143 | * receive operation priority. |
| 1144 | */ |
| 1145 | if ((ifp->if_flags & IFF_OACTIVE) == 0) |
| 1146 | mb86960_start(ifp); |
| 1147 | |
| 1148 | if (rstat != 0 || tstat != 0) |
| 1149 | rnd_add_uint32(&sc->rnd_source, rstat + tstat); |
| 1150 | |
| 1151 | /* |
| 1152 | * Get interrupt conditions, masking unneeded flags. |
| 1153 | */ |
| 1154 | tstat = bus_space_read_1(bst, bsh, FE_DLCR0) & FE_TMASK; |
| 1155 | rstat = bus_space_read_1(bst, bsh, FE_DLCR1) & FE_RMASK; |
| 1156 | if (tstat == 0 && rstat == 0) |
| 1157 | return 1; |
| 1158 | } |
| 1159 | } |
| 1160 | |
| 1161 | /* |
| 1162 | * Process an ioctl request. This code needs some work - it looks pretty ugly. |
| 1163 | */ |
| 1164 | int |
| 1165 | mb86960_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
| 1166 | { |
| 1167 | struct mb86960_softc *sc = ifp->if_softc; |
| 1168 | struct ifaddr *ifa = (struct ifaddr *)data; |
| 1169 | struct ifreq *ifr = (struct ifreq *)data; |
| 1170 | int s, error = 0; |
| 1171 | |
| 1172 | #if FE_DEBUG >= 3 |
| 1173 | log(LOG_INFO, "%s: ioctl(%lx)\n" , device_xname(sc->sc_dev), cmd); |
| 1174 | #endif |
| 1175 | |
| 1176 | s = splnet(); |
| 1177 | |
| 1178 | switch (cmd) { |
| 1179 | case SIOCINITIFADDR: |
| 1180 | if ((error = mb86960_enable(sc)) != 0) |
| 1181 | break; |
| 1182 | ifp->if_flags |= IFF_UP; |
| 1183 | |
| 1184 | mb86960_init(sc); |
| 1185 | switch (ifa->ifa_addr->sa_family) { |
| 1186 | #ifdef INET |
| 1187 | case AF_INET: |
| 1188 | arp_ifinit(ifp, ifa); |
| 1189 | break; |
| 1190 | #endif |
| 1191 | default: |
| 1192 | break; |
| 1193 | } |
| 1194 | break; |
| 1195 | |
| 1196 | case SIOCSIFFLAGS: |
| 1197 | if ((error = ifioctl_common(ifp, cmd, data)) != 0) |
| 1198 | break; |
| 1199 | /* XXX re-use ether_ioctl() */ |
| 1200 | switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { |
| 1201 | case IFF_RUNNING: |
| 1202 | /* |
| 1203 | * If interface is marked down and it is running, then |
| 1204 | * stop it. |
| 1205 | */ |
| 1206 | mb86960_stop(sc); |
| 1207 | ifp->if_flags &= ~IFF_RUNNING; |
| 1208 | mb86960_disable(sc); |
| 1209 | break; |
| 1210 | case IFF_UP: |
| 1211 | /* |
| 1212 | * If interface is marked up and it is stopped, then |
| 1213 | * start it. |
| 1214 | */ |
| 1215 | if ((error = mb86960_enable(sc)) != 0) |
| 1216 | break; |
| 1217 | mb86960_init(sc); |
| 1218 | break; |
| 1219 | case IFF_UP|IFF_RUNNING: |
| 1220 | /* |
| 1221 | * Reset the interface to pick up changes in any other |
| 1222 | * flags that affect hardware registers. |
| 1223 | */ |
| 1224 | mb86960_setmode(sc); |
| 1225 | break; |
| 1226 | case 0: |
| 1227 | break; |
| 1228 | } |
| 1229 | #if FE_DEBUG >= 1 |
| 1230 | /* "ifconfig fe0 debug" to print register dump. */ |
| 1231 | if (ifp->if_flags & IFF_DEBUG) { |
| 1232 | log(LOG_INFO, "%s: SIOCSIFFLAGS(DEBUG)\n" , |
| 1233 | device_xname(sc->sc_dev)); |
| 1234 | mb86960_dump(LOG_DEBUG, sc); |
| 1235 | } |
| 1236 | #endif |
| 1237 | break; |
| 1238 | |
| 1239 | case SIOCADDMULTI: |
| 1240 | case SIOCDELMULTI: |
| 1241 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0) { |
| 1242 | error = EIO; |
| 1243 | break; |
| 1244 | } |
| 1245 | |
| 1246 | /* Update our multicast list. */ |
| 1247 | if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { |
| 1248 | /* |
| 1249 | * Multicast list has changed; set the hardware filter |
| 1250 | * accordingly. |
| 1251 | */ |
| 1252 | if (ifp->if_flags & IFF_RUNNING) |
| 1253 | mb86960_setmode(sc); |
| 1254 | error = 0; |
| 1255 | } |
| 1256 | break; |
| 1257 | |
| 1258 | case SIOCGIFMEDIA: |
| 1259 | case SIOCSIFMEDIA: |
| 1260 | error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); |
| 1261 | break; |
| 1262 | |
| 1263 | default: |
| 1264 | error = ether_ioctl(ifp, cmd, data); |
| 1265 | break; |
| 1266 | } |
| 1267 | |
| 1268 | splx(s); |
| 1269 | return error; |
| 1270 | } |
| 1271 | |
| 1272 | /* |
| 1273 | * Retrieve packet from receive buffer and send to the next level up via |
| 1274 | * ether_input(). If there is a BPF listener, give a copy to BPF, too. |
| 1275 | * Returns 0 if success, -1 if error (i.e., mbuf allocation failure). |
| 1276 | */ |
| 1277 | int |
| 1278 | mb86960_get_packet(struct mb86960_softc *sc, u_int len) |
| 1279 | { |
| 1280 | bus_space_tag_t bst = sc->sc_bst; |
| 1281 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1282 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1283 | struct mbuf *m; |
| 1284 | |
| 1285 | /* Allocate a header mbuf. */ |
| 1286 | MGETHDR(m, M_DONTWAIT, MT_DATA); |
| 1287 | if (m == 0) |
| 1288 | return 0; |
| 1289 | m_set_rcvif(m, ifp); |
| 1290 | m->m_pkthdr.len = len; |
| 1291 | |
| 1292 | /* The following silliness is to make NFS happy. */ |
| 1293 | #define EROUND ((sizeof(struct ether_header) + 3) & ~3) |
| 1294 | #define EOFF (EROUND - sizeof(struct ether_header)) |
| 1295 | |
| 1296 | /* |
| 1297 | * Our strategy has one more problem. There is a policy on |
| 1298 | * mbuf cluster allocation. It says that we must have at |
| 1299 | * least MINCLSIZE (208 bytes) to allocate a cluster. For a |
| 1300 | * packet of a size between (MHLEN - 2) to (MINCLSIZE - 2), |
| 1301 | * our code violates the rule... |
| 1302 | * On the other hand, the current code is short, simple, |
| 1303 | * and fast, however. It does no harmful thing, just waists |
| 1304 | * some memory. Any comments? FIXME. |
| 1305 | */ |
| 1306 | |
| 1307 | /* Attach a cluster if this packet doesn't fit in a normal mbuf. */ |
| 1308 | if (len > MHLEN - EOFF) { |
| 1309 | MCLGET(m, M_DONTWAIT); |
| 1310 | if ((m->m_flags & M_EXT) == 0) { |
| 1311 | m_freem(m); |
| 1312 | return 0; |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | /* |
| 1317 | * The following assumes there is room for the ether header in the |
| 1318 | * header mbuf. |
| 1319 | */ |
| 1320 | m->m_data += EOFF; |
| 1321 | |
| 1322 | /* Set the length of this packet. */ |
| 1323 | m->m_len = len; |
| 1324 | |
| 1325 | /* Get a packet. */ |
| 1326 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) |
| 1327 | bus_space_read_multi_1(bst, bsh, FE_BMPR8, |
| 1328 | mtod(m, uint8_t *), len); |
| 1329 | else |
| 1330 | bus_space_read_multi_stream_2(bst, bsh, FE_BMPR8, |
| 1331 | mtod(m, uint16_t *), (len + 1) >> 1); |
| 1332 | |
| 1333 | /* |
| 1334 | * Check if there's a BPF listener on this interface. If so, hand off |
| 1335 | * the raw packet to bpf. |
| 1336 | */ |
| 1337 | bpf_mtap(ifp, m); |
| 1338 | |
| 1339 | if_percpuq_enqueue(ifp->if_percpuq, m); |
| 1340 | return 1; |
| 1341 | } |
| 1342 | |
| 1343 | /* |
| 1344 | * Write an mbuf chain to the transmission buffer memory using 16 bit PIO. |
| 1345 | * Returns number of bytes actually written, including length word. |
| 1346 | * |
| 1347 | * If an mbuf chain is too long for an Ethernet frame, it is not sent. |
| 1348 | * Packets shorter than Ethernet minimum are legal, and we pad them |
| 1349 | * before sending out. An exception is "partial" packets which are |
| 1350 | * shorter than mandatory Ethernet header. |
| 1351 | * |
| 1352 | * I wrote a code for an experimental "delayed padding" technique. |
| 1353 | * When employed, it postpones the padding process for short packets. |
| 1354 | * If xmit() occurred at the moment, the padding process is omitted, and |
| 1355 | * garbages are sent as pad data. If next packet is stored in the |
| 1356 | * transmission buffer before xmit(), write_mbuf() pads the previous |
| 1357 | * packet before transmitting new packet. This *may* gain the |
| 1358 | * system performance (slightly). |
| 1359 | */ |
| 1360 | void |
| 1361 | mb86960_write_mbufs(struct mb86960_softc *sc, struct mbuf *m) |
| 1362 | { |
| 1363 | bus_space_tag_t bst = sc->sc_bst; |
| 1364 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1365 | int totlen, len; |
| 1366 | #if FE_DEBUG >= 2 |
| 1367 | struct mbuf *mp; |
| 1368 | #endif |
| 1369 | |
| 1370 | #if FE_DELAYED_PADDING |
| 1371 | /* Do the "delayed padding." */ |
| 1372 | if (sc->txb_padding > 0) { |
| 1373 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 1374 | for (len = sc->txb_padding; len > 0; len--) |
| 1375 | bus_space_write_1(bst, bsh, FE_BMPR8, 0); |
| 1376 | } else { |
| 1377 | for (len = sc->txb_padding >> 1; len > 0; len--) |
| 1378 | bus_space_write_2(bst, bsh, FE_BMPR8, 0); |
| 1379 | } |
| 1380 | sc->txb_padding = 0; |
| 1381 | } |
| 1382 | #endif |
| 1383 | |
| 1384 | /* We need to use m->m_pkthdr.len, so require the header */ |
| 1385 | if ((m->m_flags & M_PKTHDR) == 0) |
| 1386 | panic("mb86960_write_mbufs: no header mbuf" ); |
| 1387 | |
| 1388 | #if FE_DEBUG >= 2 |
| 1389 | /* First, count up the total number of bytes to copy. */ |
| 1390 | for (totlen = 0, mp = m; mp != 0; mp = mp->m_next) |
| 1391 | totlen += mp->m_len; |
| 1392 | /* Check if this matches the one in the packet header. */ |
| 1393 | if (totlen != m->m_pkthdr.len) |
| 1394 | log(LOG_WARNING, "%s: packet length mismatch? (%d/%d)\n" , |
| 1395 | device_xname(sc->sc_dev), totlen, m->m_pkthdr.len); |
| 1396 | #else |
| 1397 | /* Just use the length value in the packet header. */ |
| 1398 | totlen = m->m_pkthdr.len; |
| 1399 | #endif |
| 1400 | |
| 1401 | #if FE_DEBUG >= 1 |
| 1402 | /* |
| 1403 | * Should never send big packets. If such a packet is passed, |
| 1404 | * it should be a bug of upper layer. We just ignore it. |
| 1405 | * ... Partial (too short) packets, neither. |
| 1406 | */ |
| 1407 | if (totlen > (ETHER_MAX_LEN - ETHER_CRC_LEN) || |
| 1408 | totlen < ETHER_HDR_LEN) { |
| 1409 | log(LOG_ERR, "%s: got a %s packet (%u bytes) to send\n" , |
| 1410 | device_xname(sc->sc_dev), |
| 1411 | totlen < ETHER_HDR_LEN ? "partial" : "big" , totlen); |
| 1412 | sc->sc_ec.ec_if.if_oerrors++; |
| 1413 | return; |
| 1414 | } |
| 1415 | #endif |
| 1416 | |
| 1417 | /* |
| 1418 | * Put the length word for this frame. |
| 1419 | * Does 86960 accept odd length? -- Yes. |
| 1420 | * Do we need to pad the length to minimum size by ourselves? |
| 1421 | * -- Generally yes. But for (or will be) the last |
| 1422 | * packet in the transmission buffer, we can skip the |
| 1423 | * padding process. It may gain performance slightly. FIXME. |
| 1424 | */ |
| 1425 | len = max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); |
| 1426 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 1427 | bus_space_write_1(bst, bsh, FE_BMPR8, len); |
| 1428 | bus_space_write_1(bst, bsh, FE_BMPR8, len >> 8); |
| 1429 | } else { |
| 1430 | bus_space_write_2(bst, bsh, FE_BMPR8, len); |
| 1431 | /* roundup packet length since we will use word access */ |
| 1432 | totlen = (totlen + 1) & ~1; |
| 1433 | } |
| 1434 | |
| 1435 | /* |
| 1436 | * Update buffer status now. |
| 1437 | * Truncate the length up to an even number |
| 1438 | * if the chip is set in SBW_WORD mode. |
| 1439 | */ |
| 1440 | sc->txb_free -= FE_TXLEN_SIZE + |
| 1441 | max(totlen, (ETHER_MIN_LEN - ETHER_CRC_LEN)); |
| 1442 | sc->txb_count++; |
| 1443 | |
| 1444 | #if FE_DELAYED_PADDING |
| 1445 | /* Postpone the packet padding if necessary. */ |
| 1446 | if (totlen < (ETHER_MIN_LEN - ETHER_CRC_LEN)) |
| 1447 | sc->txb_padding = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; |
| 1448 | #endif |
| 1449 | |
| 1450 | /* |
| 1451 | * Transfer the data from mbuf chain to the transmission buffer. |
| 1452 | * If the MB86960 is configured in word mode, data needs to be |
| 1453 | * transferred as words, and only words. |
| 1454 | * So that we require some extra code to patch over odd-length |
| 1455 | * or unaligned mbufs. |
| 1456 | */ |
| 1457 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 1458 | /* It's simple in byte mode. */ |
| 1459 | for (; m != NULL; m = m->m_next) { |
| 1460 | if (m->m_len) { |
| 1461 | bus_space_write_multi_1(bst, bsh, FE_BMPR8, |
| 1462 | mtod(m, uint8_t *), m->m_len); |
| 1463 | } |
| 1464 | } |
| 1465 | } else { |
| 1466 | /* a bit trickier in word mode. */ |
| 1467 | uint8_t *data, savebyte[2]; |
| 1468 | int leftover; |
| 1469 | |
| 1470 | leftover = 0; |
| 1471 | savebyte[0] = savebyte[1] = 0; |
| 1472 | |
| 1473 | for (; m != NULL; m = m->m_next) { |
| 1474 | len = m->m_len; |
| 1475 | if (len == 0) |
| 1476 | continue; |
| 1477 | data = mtod(m, uint8_t *); |
| 1478 | while (len > 0) { |
| 1479 | if (leftover) { |
| 1480 | /* |
| 1481 | * Data left over (from mbuf or |
| 1482 | * realignment). Buffer the next |
| 1483 | * byte, and write it and the |
| 1484 | * leftover data out. |
| 1485 | */ |
| 1486 | savebyte[1] = *data++; |
| 1487 | len--; |
| 1488 | bus_space_write_stream_2(bst, bsh, |
| 1489 | FE_BMPR8, *(uint16_t *)savebyte); |
| 1490 | leftover = 0; |
| 1491 | } else if (BUS_SPACE_ALIGNED_POINTER(data, |
| 1492 | uint16_t) == 0) { |
| 1493 | /* |
| 1494 | * Unaligned data; buffer the next byte. |
| 1495 | */ |
| 1496 | savebyte[0] = *data++; |
| 1497 | len--; |
| 1498 | leftover = 1; |
| 1499 | } else { |
| 1500 | /* |
| 1501 | * Aligned data; output contiguous |
| 1502 | * words as much as we can, then |
| 1503 | * buffer the remaining byte, if any. |
| 1504 | */ |
| 1505 | leftover = len & 1; |
| 1506 | len &= ~1; |
| 1507 | bus_space_write_multi_stream_2(bst, bsh, |
| 1508 | FE_BMPR8, (uint16_t *)data, |
| 1509 | len >> 1); |
| 1510 | data += len; |
| 1511 | if (leftover) |
| 1512 | savebyte[0] = *data++; |
| 1513 | len = 0; |
| 1514 | } |
| 1515 | } |
| 1516 | if (len < 0) |
| 1517 | panic("mb86960_write_mbufs: negative len" ); |
| 1518 | } |
| 1519 | if (leftover) { |
| 1520 | savebyte[1] = 0; |
| 1521 | bus_space_write_stream_2(bst, bsh, FE_BMPR8, |
| 1522 | *(uint16_t *)savebyte); |
| 1523 | } |
| 1524 | } |
| 1525 | #if FE_DELAYED_PADDING == 0 |
| 1526 | /* |
| 1527 | * Pad the packet to the minimum length if necessary. |
| 1528 | */ |
| 1529 | len = (ETHER_MIN_LEN - ETHER_CRC_LEN) - totlen; |
| 1530 | if (len > 0) { |
| 1531 | if (sc->sc_flags & FE_FLAGS_SBW_BYTE) { |
| 1532 | while (len-- > 0) |
| 1533 | bus_space_write_1(bst, bsh, FE_BMPR8, 0); |
| 1534 | } else { |
| 1535 | len >>= 1; |
| 1536 | while (len-- > 0) |
| 1537 | bus_space_write_2(bst, bsh, FE_BMPR8, 0); |
| 1538 | } |
| 1539 | } |
| 1540 | #endif |
| 1541 | } |
| 1542 | |
| 1543 | /* |
| 1544 | * Compute the multicast address filter from the |
| 1545 | * list of multicast addresses we need to listen to. |
| 1546 | */ |
| 1547 | void |
| 1548 | mb86960_getmcaf(struct ethercom *ec, uint8_t *af) |
| 1549 | { |
| 1550 | struct ifnet *ifp = &ec->ec_if; |
| 1551 | struct ether_multi *enm; |
| 1552 | uint32_t crc; |
| 1553 | struct ether_multistep step; |
| 1554 | |
| 1555 | /* |
| 1556 | * Set up multicast address filter by passing all multicast addresses |
| 1557 | * through a crc generator, and then using the high order 6 bits as an |
| 1558 | * index into the 64 bit logical address filter. The high order bit |
| 1559 | * selects the word, while the rest of the bits select the bit within |
| 1560 | * the word. |
| 1561 | */ |
| 1562 | |
| 1563 | if ((ifp->if_flags & IFF_PROMISC) != 0) |
| 1564 | goto allmulti; |
| 1565 | |
| 1566 | memset(af, 0, FE_FILTER_LEN); |
| 1567 | ETHER_FIRST_MULTI(step, ec, enm); |
| 1568 | while (enm != NULL) { |
| 1569 | if (memcmp(enm->enm_addrlo, enm->enm_addrhi, |
| 1570 | sizeof(enm->enm_addrlo)) != 0) { |
| 1571 | /* |
| 1572 | * We must listen to a range of multicast addresses. |
| 1573 | * For now, just accept all multicasts, rather than |
| 1574 | * trying to set only those filter bits needed to match |
| 1575 | * the range. (At this time, the only use of address |
| 1576 | * ranges is for IP multicast routing, for which the |
| 1577 | * range is big enough to require all bits set.) |
| 1578 | */ |
| 1579 | goto allmulti; |
| 1580 | } |
| 1581 | |
| 1582 | crc = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN); |
| 1583 | |
| 1584 | /* Just want the 6 most significant bits. */ |
| 1585 | crc >>= 26; |
| 1586 | |
| 1587 | /* Turn on the corresponding bit in the filter. */ |
| 1588 | af[crc >> 3] |= 1 << (crc & 7); |
| 1589 | |
| 1590 | ETHER_NEXT_MULTI(step, enm); |
| 1591 | } |
| 1592 | ifp->if_flags &= ~IFF_ALLMULTI; |
| 1593 | return; |
| 1594 | |
| 1595 | allmulti: |
| 1596 | ifp->if_flags |= IFF_ALLMULTI; |
| 1597 | memset(af, 0xff, FE_FILTER_LEN); |
| 1598 | } |
| 1599 | |
| 1600 | /* |
| 1601 | * Calculate a new "multicast packet filter" and put the 86960 |
| 1602 | * receiver in appropriate mode. |
| 1603 | */ |
| 1604 | void |
| 1605 | mb86960_setmode(struct mb86960_softc *sc) |
| 1606 | { |
| 1607 | bus_space_tag_t bst = sc->sc_bst; |
| 1608 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1609 | int flags = sc->sc_ec.ec_if.if_flags; |
| 1610 | |
| 1611 | /* |
| 1612 | * If the interface is not running, we postpone the update |
| 1613 | * process for receive modes and multicast address filter |
| 1614 | * until the interface is restarted. It reduces some |
| 1615 | * complicated job on maintaining chip states. (Earlier versions |
| 1616 | * of this driver had a bug on that point...) |
| 1617 | * |
| 1618 | * To complete the trick, mb86960_init() calls mb86960_setmode() after |
| 1619 | * restarting the interface. |
| 1620 | */ |
| 1621 | if ((flags & IFF_RUNNING) == 0) |
| 1622 | return; |
| 1623 | |
| 1624 | /* |
| 1625 | * Promiscuous mode is handled separately. |
| 1626 | */ |
| 1627 | if ((flags & IFF_PROMISC) != 0) { |
| 1628 | /* |
| 1629 | * Program 86960 to receive all packets on the segment |
| 1630 | * including those directed to other stations. |
| 1631 | * Multicast filter stored in MARs are ignored |
| 1632 | * under this setting, so we don't need to update it. |
| 1633 | * |
| 1634 | * Promiscuous mode is used solely by BPF, and BPF only |
| 1635 | * listens to valid (no error) packets. So, we ignore |
| 1636 | * errornous ones even in this mode. |
| 1637 | */ |
| 1638 | bus_space_write_1(bst, bsh, FE_DLCR5, |
| 1639 | sc->proto_dlcr5 | FE_D5_AFM0 | FE_D5_AFM1); |
| 1640 | sc->filter_change = 0; |
| 1641 | |
| 1642 | #if FE_DEBUG >= 3 |
| 1643 | log(LOG_INFO, "%s: promiscuous mode\n" , |
| 1644 | device_xname(sc->sc_dev)); |
| 1645 | #endif |
| 1646 | return; |
| 1647 | } |
| 1648 | |
| 1649 | /* |
| 1650 | * Turn the chip to the normal (non-promiscuous) mode. |
| 1651 | */ |
| 1652 | bus_space_write_1(bst, bsh, FE_DLCR5, sc->proto_dlcr5 | FE_D5_AFM1); |
| 1653 | |
| 1654 | /* |
| 1655 | * Find the new multicast filter value. |
| 1656 | */ |
| 1657 | mb86960_getmcaf(&sc->sc_ec, sc->filter); |
| 1658 | sc->filter_change = 1; |
| 1659 | |
| 1660 | #if FE_DEBUG >= 3 |
| 1661 | log(LOG_INFO, |
| 1662 | "%s: address filter: [%02x %02x %02x %02x %02x %02x %02x %02x]\n" , |
| 1663 | device_xname(sc->sc_dev), |
| 1664 | sc->filter[0], sc->filter[1], sc->filter[2], sc->filter[3], |
| 1665 | sc->filter[4], sc->filter[5], sc->filter[6], sc->filter[7]); |
| 1666 | #endif |
| 1667 | |
| 1668 | /* |
| 1669 | * We have to update the multicast filter in the 86960, A.S.A.P. |
| 1670 | * |
| 1671 | * Note that the DLC (Data Linc Control unit, i.e. transmitter |
| 1672 | * and receiver) must be stopped when feeding the filter, and |
| 1673 | * DLC trashes all packets in both transmission and receive |
| 1674 | * buffers when stopped. |
| 1675 | * |
| 1676 | * ... Are the above sentenses correct? I have to check the |
| 1677 | * manual of the MB86960A. FIXME. |
| 1678 | * |
| 1679 | * To reduce the packet lossage, we delay the filter update |
| 1680 | * process until buffers are empty. |
| 1681 | */ |
| 1682 | if (sc->txb_sched == 0 && sc->txb_count == 0 && |
| 1683 | (bus_space_read_1(bst, bsh, FE_DLCR1) & FE_D1_PKTRDY) == 0) { |
| 1684 | /* |
| 1685 | * Buffers are (apparently) empty. Load |
| 1686 | * the new filter value into MARs now. |
| 1687 | */ |
| 1688 | mb86960_loadmar(sc); |
| 1689 | } else { |
| 1690 | /* |
| 1691 | * Buffers are not empty. Mark that we have to update |
| 1692 | * the MARs. The new filter will be loaded by mb86960_intr() |
| 1693 | * later. |
| 1694 | */ |
| 1695 | #if FE_DEBUG >= 4 |
| 1696 | log(LOG_INFO, "%s: filter change delayed\n" , |
| 1697 | device_xname(sc->sc_dev)); |
| 1698 | #endif |
| 1699 | } |
| 1700 | } |
| 1701 | |
| 1702 | /* |
| 1703 | * Load a new multicast address filter into MARs. |
| 1704 | * |
| 1705 | * The caller must have splnet'ed befor mb86960_loadmar. |
| 1706 | * This function starts the DLC upon return. So it can be called only |
| 1707 | * when the chip is working, i.e., from the driver's point of view, when |
| 1708 | * a device is RUNNING. (I mistook the point in previous versions.) |
| 1709 | */ |
| 1710 | void |
| 1711 | mb86960_loadmar(struct mb86960_softc *sc) |
| 1712 | { |
| 1713 | bus_space_tag_t bst = sc->sc_bst; |
| 1714 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1715 | |
| 1716 | /* Stop the DLC (transmitter and receiver). */ |
| 1717 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 1718 | sc->proto_dlcr6 | FE_D6_DLC_DISABLE); |
| 1719 | |
| 1720 | /* Select register bank 1 for MARs. */ |
| 1721 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 1722 | sc->proto_dlcr7 | FE_D7_RBS_MAR | FE_D7_POWER_UP); |
| 1723 | |
| 1724 | /* Copy filter value into the registers. */ |
| 1725 | bus_space_write_region_1(bst, bsh, FE_MAR8, sc->filter, FE_FILTER_LEN); |
| 1726 | |
| 1727 | /* Restore the bank selection for BMPRs (i.e., runtime registers). */ |
| 1728 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 1729 | sc->proto_dlcr7 | FE_D7_RBS_BMPR | FE_D7_POWER_UP); |
| 1730 | |
| 1731 | /* Restart the DLC. */ |
| 1732 | bus_space_write_1(bst, bsh, FE_DLCR6, |
| 1733 | sc->proto_dlcr6 | FE_D6_DLC_ENABLE); |
| 1734 | |
| 1735 | /* We have just updated the filter. */ |
| 1736 | sc->filter_change = 0; |
| 1737 | |
| 1738 | #if FE_DEBUG >= 3 |
| 1739 | log(LOG_INFO, "%s: address filter changed\n" , device_xname(sc->sc_dev)); |
| 1740 | #endif |
| 1741 | } |
| 1742 | |
| 1743 | /* |
| 1744 | * Enable power on the interface. |
| 1745 | */ |
| 1746 | int |
| 1747 | mb86960_enable(struct mb86960_softc *sc) |
| 1748 | { |
| 1749 | |
| 1750 | #if FE_DEBUG >= 3 |
| 1751 | log(LOG_INFO, "%s: mb86960_enable()\n" , device_xname(sc->sc_dev)); |
| 1752 | #endif |
| 1753 | |
| 1754 | if ((sc->sc_stat & FE_STAT_ENABLED) == 0 && sc->sc_enable != NULL) { |
| 1755 | if ((*sc->sc_enable)(sc) != 0) { |
| 1756 | aprint_error_dev(sc->sc_dev, "device enable failed\n" ); |
| 1757 | return EIO; |
| 1758 | } |
| 1759 | } |
| 1760 | |
| 1761 | sc->sc_stat |= FE_STAT_ENABLED; |
| 1762 | return 0; |
| 1763 | } |
| 1764 | |
| 1765 | /* |
| 1766 | * Disable power on the interface. |
| 1767 | */ |
| 1768 | void |
| 1769 | mb86960_disable(struct mb86960_softc *sc) |
| 1770 | { |
| 1771 | |
| 1772 | #if FE_DEBUG >= 3 |
| 1773 | log(LOG_INFO, "%s: mb86960_disable()\n" , device_xname(sc->sc_dev)); |
| 1774 | #endif |
| 1775 | |
| 1776 | if ((sc->sc_stat & FE_STAT_ENABLED) != 0 && sc->sc_disable != NULL) { |
| 1777 | (*sc->sc_disable)(sc); |
| 1778 | sc->sc_stat &= ~FE_STAT_ENABLED; |
| 1779 | } |
| 1780 | } |
| 1781 | |
| 1782 | /* |
| 1783 | * mbe_activate: |
| 1784 | * |
| 1785 | * Handle device activation/deactivation requests. |
| 1786 | */ |
| 1787 | int |
| 1788 | mb86960_activate(device_t self, enum devact act) |
| 1789 | { |
| 1790 | struct mb86960_softc *sc = device_private(self); |
| 1791 | |
| 1792 | switch (act) { |
| 1793 | case DVACT_DEACTIVATE: |
| 1794 | if_deactivate(&sc->sc_ec.ec_if); |
| 1795 | return 0; |
| 1796 | default: |
| 1797 | return EOPNOTSUPP; |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | /* |
| 1802 | * mb86960_detach: |
| 1803 | * |
| 1804 | * Detach a MB86960 interface. |
| 1805 | */ |
| 1806 | int |
| 1807 | mb86960_detach(struct mb86960_softc *sc) |
| 1808 | { |
| 1809 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1810 | |
| 1811 | /* Succeed now if there's no work to do. */ |
| 1812 | if ((sc->sc_stat & FE_STAT_ATTACHED) == 0) |
| 1813 | return 0; |
| 1814 | |
| 1815 | /* Delete all media. */ |
| 1816 | ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); |
| 1817 | |
| 1818 | /* Unhook the entropy source. */ |
| 1819 | rnd_detach_source(&sc->rnd_source); |
| 1820 | |
| 1821 | ether_ifdetach(ifp); |
| 1822 | if_detach(ifp); |
| 1823 | |
| 1824 | mb86960_disable(sc); |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | /* |
| 1829 | * Routines to read all bytes from the config EEPROM (93C06) through MB86965A. |
| 1830 | */ |
| 1831 | void |
| 1832 | mb86965_read_eeprom(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *data) |
| 1833 | { |
| 1834 | int addr, op, bit; |
| 1835 | uint16_t val; |
| 1836 | |
| 1837 | /* Read bytes from EEPROM; two bytes per an iteration. */ |
| 1838 | for (addr = 0; addr < FE_EEPROM_SIZE / 2; addr++) { |
| 1839 | /* Reset the EEPROM interface. */ |
| 1840 | bus_space_write_1(iot, ioh, FE_BMPR16, 0x00); |
| 1841 | bus_space_write_1(iot, ioh, FE_BMPR17, 0x00); |
| 1842 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
| 1843 | |
| 1844 | /* Send start bit. */ |
| 1845 | bus_space_write_1(iot, ioh, FE_BMPR17, FE_B17_DATA); |
| 1846 | FE_EEPROM_DELAY(); |
| 1847 | bus_space_write_1(iot, ioh, |
| 1848 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
| 1849 | FE_EEPROM_DELAY(); |
| 1850 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
| 1851 | |
| 1852 | /* Send read command and read address. */ |
| 1853 | op = 0x80 | addr; /* READ instruction */ |
| 1854 | for (bit = 8; bit > 0; bit--) { |
| 1855 | bus_space_write_1(iot, ioh, FE_BMPR17, |
| 1856 | (op & (1 << (bit - 1))) ? FE_B17_DATA : 0); |
| 1857 | FE_EEPROM_DELAY(); |
| 1858 | bus_space_write_1(iot, ioh, |
| 1859 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
| 1860 | FE_EEPROM_DELAY(); |
| 1861 | bus_space_write_1(iot, ioh, FE_BMPR16, FE_B16_SELECT); |
| 1862 | } |
| 1863 | bus_space_write_1(iot, ioh, FE_BMPR17, 0x00); |
| 1864 | |
| 1865 | /* Read two bytes in each address */ |
| 1866 | val = 0; |
| 1867 | for (bit = 16; bit > 0; bit--) { |
| 1868 | FE_EEPROM_DELAY(); |
| 1869 | bus_space_write_1(iot, ioh, |
| 1870 | FE_BMPR16, FE_B16_SELECT | FE_B16_CLOCK); |
| 1871 | FE_EEPROM_DELAY(); |
| 1872 | if (bus_space_read_1(iot, ioh, FE_BMPR17) & |
| 1873 | FE_B17_DATA) |
| 1874 | val |= 1 << (bit - 1); |
| 1875 | bus_space_write_1(iot, ioh, |
| 1876 | FE_BMPR16, FE_B16_SELECT); |
| 1877 | } |
| 1878 | data[addr * 2] = val >> 8; |
| 1879 | data[addr * 2 + 1] = val & 0xff; |
| 1880 | } |
| 1881 | |
| 1882 | /* Make sure the EEPROM is turned off. */ |
| 1883 | bus_space_write_1(iot, ioh, FE_BMPR16, 0); |
| 1884 | bus_space_write_1(iot, ioh, FE_BMPR17, 0); |
| 1885 | |
| 1886 | #if FE_DEBUG >= 3 |
| 1887 | /* Report what we got. */ |
| 1888 | log(LOG_INFO, "mb86965_read_eeprom: " |
| 1889 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
| 1890 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
| 1891 | " %02x%02x%02x%02x %02x%02x%02x%02x -" |
| 1892 | " %02x%02x%02x%02x %02x%02x%02x%02x\n" , |
| 1893 | data[ 0], data[ 1], data[ 2], data[ 3], |
| 1894 | data[ 4], data[ 5], data[ 6], data[ 7], |
| 1895 | data[ 8], data[ 9], data[10], data[11], |
| 1896 | data[12], data[13], data[14], data[15], |
| 1897 | data[16], data[17], data[18], data[19], |
| 1898 | data[20], data[21], data[22], data[23], |
| 1899 | data[24], data[25], data[26], data[27], |
| 1900 | data[28], data[29], data[30], data[31]); |
| 1901 | #endif |
| 1902 | } |
| 1903 | |
| 1904 | #if FE_DEBUG >= 1 |
| 1905 | void |
| 1906 | mb86960_dump(int level, struct mb86960_softc *sc) |
| 1907 | { |
| 1908 | bus_space_tag_t bst = sc->sc_bst; |
| 1909 | bus_space_handle_t bsh = sc->sc_bsh; |
| 1910 | uint8_t save_dlcr7; |
| 1911 | |
| 1912 | save_dlcr7 = bus_space_read_1(bst, bsh, FE_DLCR7); |
| 1913 | |
| 1914 | log(level, "\tDLCR = %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
| 1915 | bus_space_read_1(bst, bsh, FE_DLCR0), |
| 1916 | bus_space_read_1(bst, bsh, FE_DLCR1), |
| 1917 | bus_space_read_1(bst, bsh, FE_DLCR2), |
| 1918 | bus_space_read_1(bst, bsh, FE_DLCR3), |
| 1919 | bus_space_read_1(bst, bsh, FE_DLCR4), |
| 1920 | bus_space_read_1(bst, bsh, FE_DLCR5), |
| 1921 | bus_space_read_1(bst, bsh, FE_DLCR6), |
| 1922 | bus_space_read_1(bst, bsh, FE_DLCR7)); |
| 1923 | |
| 1924 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 1925 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_DLCR); |
| 1926 | log(level, "\t %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
| 1927 | bus_space_read_1(bst, bsh, FE_DLCR8), |
| 1928 | bus_space_read_1(bst, bsh, FE_DLCR9), |
| 1929 | bus_space_read_1(bst, bsh, FE_DLCR10), |
| 1930 | bus_space_read_1(bst, bsh, FE_DLCR11), |
| 1931 | bus_space_read_1(bst, bsh, FE_DLCR12), |
| 1932 | bus_space_read_1(bst, bsh, FE_DLCR13), |
| 1933 | bus_space_read_1(bst, bsh, FE_DLCR14), |
| 1934 | bus_space_read_1(bst, bsh, FE_DLCR15)); |
| 1935 | |
| 1936 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 1937 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_MAR); |
| 1938 | log(level, "\tMAR = %02x %02x %02x %02x %02x %02x %02x %02x\n" , |
| 1939 | bus_space_read_1(bst, bsh, FE_MAR8), |
| 1940 | bus_space_read_1(bst, bsh, FE_MAR9), |
| 1941 | bus_space_read_1(bst, bsh, FE_MAR10), |
| 1942 | bus_space_read_1(bst, bsh, FE_MAR11), |
| 1943 | bus_space_read_1(bst, bsh, FE_MAR12), |
| 1944 | bus_space_read_1(bst, bsh, FE_MAR13), |
| 1945 | bus_space_read_1(bst, bsh, FE_MAR14), |
| 1946 | bus_space_read_1(bst, bsh, FE_MAR15)); |
| 1947 | |
| 1948 | bus_space_write_1(bst, bsh, FE_DLCR7, |
| 1949 | (save_dlcr7 & ~FE_D7_RBS) | FE_D7_RBS_BMPR); |
| 1950 | log(level, |
| 1951 | "\tBMPR = xx xx %02x %02x %02x %02x %02x %02x %02x %02x xx %02x\n" , |
| 1952 | bus_space_read_1(bst, bsh, FE_BMPR10), |
| 1953 | bus_space_read_1(bst, bsh, FE_BMPR11), |
| 1954 | bus_space_read_1(bst, bsh, FE_BMPR12), |
| 1955 | bus_space_read_1(bst, bsh, FE_BMPR13), |
| 1956 | bus_space_read_1(bst, bsh, FE_BMPR14), |
| 1957 | bus_space_read_1(bst, bsh, FE_BMPR15), |
| 1958 | bus_space_read_1(bst, bsh, FE_BMPR16), |
| 1959 | bus_space_read_1(bst, bsh, FE_BMPR17), |
| 1960 | bus_space_read_1(bst, bsh, FE_BMPR19)); |
| 1961 | |
| 1962 | bus_space_write_1(bst, bsh, FE_DLCR7, save_dlcr7); |
| 1963 | } |
| 1964 | #endif |
| 1965 | |
| 1966 | |