1 /* $NetBSD: if_gpn.c,v 1.14 2020/02/01 21:45:11 thorpej Exp $ */ 2 /*- 3 * Copyright (c) 2008 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas <matt@3am-software.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 33 #include "opt_gemini.h" 34 35 __KERNEL_RCSID(0, "$NetBSD: if_gpn.c,v 1.14 2020/02/01 21:45:11 thorpej Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/device.h> 39 #include <sys/mbuf.h> 40 #include <sys/ioctl.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 #include <net/if_ether.h> 45 #include <net/if_dl.h> 46 #include <net/bpf.h> 47 48 #include <sys/bus.h> 49 50 #include <arm/gemini/gemini_var.h> 51 #include <arm/gemini/gemini_ipm.h> 52 53 #define GPN_MOF 0x00 /* Middle Of Frame */ 54 #define GPN_SOF 0x01 /* Start of Frame */ 55 #define GPN_EOF 0x02 /* End of Frame */ 56 #define GPN_FRAME 0x03 /* Complete Frame */ 57 58 #define GPN_IFUP 0x05 /* partner is up */ 59 #define GPN_IFDOWN 0x06 /* partner is down */ 60 61 #define GPN_ACK0 0x10 /* placeholder */ 62 #define GPN_ACK1 0x11 /* Ack 1 descriptor */ 63 #define GPN_ACK2 0x12 /* Ack 2 descriptors */ 64 #define GPN_ACK3 0x13 /* Ack 3 descriptors */ 65 #define GPN_ACK4 0x14 /* Ack 4 descriptors */ 66 #define GPN_ACK5 0x15 /* Ack 5 descriptors */ 67 #define GPN_ACK6 0x16 /* Ack 6 descriptors */ 68 #define GPN_ACK7 0x17 /* Ack 7 descriptors */ 69 #define GPN_ACK8 0x18 /* Ack 8 descriptors */ 70 #define GPN_ACK9 0x19 /* Ack 9 descriptors */ 71 #define GPN_ACK10 0x1a /* Ack 10 descriptors */ 72 #define GPN_ACK11 0x1b /* Ack 11 descriptors */ 73 #define GPN_ACK12 0x1c /* Ack 12 descriptors */ 74 #define GPN_ACK13 0x1d /* Ack 13 descriptors */ 75 #define GPN_ACK14 0x1e /* Ack 14 descriptors */ 76 77 typedef struct { 78 uint8_t gd_tag; 79 uint8_t gd_subtype; 80 uint8_t gd_txid; 81 uint8_t gd_pktlen64; 82 uint16_t gd_len1; 83 uint16_t gd_len2; 84 uint32_t gd_addr1; 85 uint32_t gd_addr2; 86 } ipm_gpn_desc_t; 87 88 typedef struct { 89 uint8_t agd_tag; 90 uint8_t agd_subtype; 91 uint8_t agd_txids[14]; 92 } ipm_gpn_ack_desc_t; 93 94 #define MAX_TXACTIVE 60 95 96 struct gpn_txinfo { 97 struct mbuf *ti_mbuf; 98 bus_dmamap_t ti_map; 99 }; 100 101 struct gpn_softc { 102 device_t sc_dev; 103 bus_dma_tag_t sc_dmat; 104 struct ifmedia sc_im; 105 struct ethercom sc_ec; 106 #define sc_if sc_ec.ec_if 107 size_t sc_free; 108 size_t sc_txactive; 109 void *sc_ih; 110 ipm_gpn_ack_desc_t sc_ack_desc; 111 struct mbuf *sc_rxmbuf; 112 struct gpn_txinfo sc_txinfo[MAX_TXACTIVE]; 113 uint8_t sc_lastid; 114 bool sc_remoteup; /* remote side up? */ 115 }; 116 117 CTASSERT((GPN_SOF | GPN_EOF) == GPN_FRAME); 118 CTASSERT((GPN_SOF & GPN_EOF) == 0); 119 120 extern struct cfdriver gpn_cd; 121 122 static void gpn_ifstart(struct ifnet *); 123 124 #ifdef GPNDEBUG 125 static uint32_t 126 m_crc32_le(struct mbuf *m) 127 { 128 static const uint32_t crctab[] = { 129 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 130 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 131 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 132 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 133 }; 134 uint32_t crc; 135 size_t i; 136 137 crc = 0xffffffffU; /* initial value */ 138 139 for (; m; m = m->m_next) { 140 for (i = 0; i < m->m_len; i++) { 141 crc ^= m->m_data[i]; 142 crc = (crc >> 4) ^ crctab[crc & 0xf]; 143 crc = (crc >> 4) ^ crctab[crc & 0xf]; 144 } 145 } 146 147 return crc; 148 } 149 #endif 150 151 static void 152 gpn_free_dmamaps(struct gpn_softc *sc) 153 { 154 struct gpn_txinfo *ti = sc->sc_txinfo; 155 struct gpn_txinfo * const end_ti = ti + __arraycount(sc->sc_txinfo); 156 157 for (; ti < end_ti; ti++) { 158 if (ti->ti_map == NULL) 159 continue; 160 bus_dmamap_destroy(sc->sc_dmat, ti->ti_map); 161 ti->ti_map = NULL; 162 } 163 } 164 165 static int 166 gpn_alloc_dmamaps(struct gpn_softc *sc) 167 { 168 struct gpn_txinfo *ti = sc->sc_txinfo; 169 struct gpn_txinfo * const end_ti = ti + __arraycount(sc->sc_txinfo); 170 int error; 171 172 for (error = 0; ti < end_ti; ti++) { 173 if (ti->ti_map != NULL) 174 continue; 175 error = bus_dmamap_create(sc->sc_dmat, 176 10000, 2, 8192, 0, 177 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK, 178 &ti->ti_map); 179 if (error) 180 break; 181 } 182 183 if (error) 184 gpn_free_dmamaps(sc); 185 186 return error; 187 } 188 189 static bool 190 gpn_add_data(struct gpn_softc *sc, bus_addr_t addr, bus_size_t len) 191 { 192 struct mbuf *m, *m0; 193 size_t space; 194 195 m = sc->sc_rxmbuf; 196 KASSERT(m != NULL); 197 198 m->m_pkthdr.len += len; 199 200 while (m->m_next != NULL) 201 m = m->m_next; 202 203 KASSERT(len > 0); 204 space = M_TRAILINGSPACE(m); 205 for (;;) { 206 if (space > 0) { 207 if (len < space) 208 space = len; 209 gemini_ipm_copyin(mtod(m, uint8_t *) + m->m_len, addr, 210 space); 211 len -= space; 212 m->m_len += space; 213 if (len == 0) 214 return true; 215 addr += space; 216 } 217 MGET(m0, M_DONTWAIT, MT_DATA); 218 if (m0 == NULL) 219 break; 220 space = MLEN; 221 if (len > space) { 222 MCLGET(m0, M_DONTWAIT); 223 if (m0->m_flags & M_EXT) 224 space = MCLBYTES; 225 } 226 m->m_len = 0; 227 m->m_next = m0; 228 m = m0; 229 } 230 return false; 231 } 232 233 static void 234 gpn_ack_txid(struct gpn_softc *sc, unsigned int txid) 235 { 236 ipm_gpn_ack_desc_t * const agd = &sc->sc_ack_desc; 237 agd->agd_txids[agd->agd_subtype] = txid; 238 if (++agd->agd_subtype == __arraycount(agd->agd_txids)) { 239 agd->agd_subtype += GPN_ACK0; 240 sc->sc_free--; 241 gemini_ipm_produce(agd, 1); 242 agd->agd_subtype = 0; 243 } 244 } 245 246 static void 247 gpn_process_data(struct gpn_softc *sc, const ipm_gpn_desc_t *gd) 248 { 249 struct ifnet * const ifp = &sc->sc_if; 250 size_t pktlen = gd->gd_pktlen64 * 64; 251 unsigned int subtype = gd->gd_subtype; 252 bool ok; 253 254 if ((subtype & GPN_SOF) == 0 && sc->sc_rxmbuf == NULL) { 255 if_statinc(ifp, if_ierrors); 256 goto out; 257 } 258 259 if ((subtype & GPN_SOF) && sc->sc_rxmbuf != NULL) { 260 if_statinc(ifp, if_ierrors); 261 m_freem(sc->sc_rxmbuf); 262 sc->sc_rxmbuf = NULL; 263 } 264 265 if (sc->sc_rxmbuf == NULL) { 266 struct mbuf *m; 267 MGETHDR(m, M_DONTWAIT, MT_DATA); 268 if (m == NULL) { 269 if_statinc(ifp, if_ierrors); 270 goto out; 271 } 272 if (pktlen > MHLEN - 2) { 273 MCLGET(m, M_DONTWAIT); 274 if ((m->m_flags & M_EXT) == 0) { 275 if_statinc(ifp, if_ierrors); 276 m_free(m); 277 goto out; 278 } 279 } 280 m->m_data += 2; /* makes ethernet payload 32bit aligned */ 281 m->m_len = 0; 282 m->m_pkthdr.len = 0; 283 sc->sc_rxmbuf = m; 284 } 285 286 ok = gpn_add_data(sc, gd->gd_addr1, gd->gd_len1); 287 if (ok && gd->gd_addr2 && gd->gd_len2) 288 ok = gpn_add_data(sc, gd->gd_addr2, gd->gd_len2); 289 if (!ok) { 290 if_statinc(ifp, if_ierrors); 291 m_freem(sc->sc_rxmbuf); 292 sc->sc_rxmbuf = NULL; 293 goto out; 294 } 295 296 if (subtype & GPN_EOF) { 297 struct mbuf *m; 298 m = sc->sc_rxmbuf; 299 sc->sc_rxmbuf = NULL; 300 m_set_rcvif(m, ifp); 301 KASSERT(((m->m_pkthdr.len + 63) >> 6) == gd->gd_pktlen64); 302 #ifdef GPNDEBUG 303 printf("%s: rx len=%d crc=%#x\n", ifp->if_xname, 304 m->m_pkthdr.len, m_crc32_le(m)); 305 #endif 306 if_percpuq_enqueue(ifp->if_percpuq, m); 307 } 308 309 out: 310 gpn_ack_txid(sc, gd->gd_txid); 311 } 312 313 static void 314 gpn_free_txid(struct gpn_softc *sc, size_t txid) 315 { 316 struct gpn_txinfo * const ti = sc->sc_txinfo + txid; 317 318 KASSERT(txid < MAX_TXACTIVE); 319 320 if (ti->ti_mbuf == NULL) 321 return; 322 323 bus_dmamap_sync(sc->sc_dmat, ti->ti_map, 324 0, ti->ti_mbuf->m_len, BUS_DMASYNC_POSTREAD); 325 bus_dmamap_unload(sc->sc_dmat, ti->ti_map); 326 m_freem(ti->ti_mbuf); 327 ti->ti_mbuf = NULL; 328 sc->sc_txactive--; 329 KASSERT(sc->sc_txactive < MAX_TXACTIVE); 330 if (sc->sc_if.if_flags & IFF_OACTIVE) { 331 sc->sc_if.if_flags &= ~IFF_OACTIVE; 332 gpn_ifstart(&sc->sc_if); 333 } 334 } 335 336 static void 337 gpn_ipm_rebate(void *arg, size_t count) 338 { 339 struct gpn_softc * const sc = arg; 340 int s; 341 342 s = splnet(); 343 sc->sc_free += count; 344 345 sc->sc_if.if_flags &= ~IFF_OACTIVE; 346 gpn_ifstart(&sc->sc_if); 347 splx(s); 348 } 349 350 static void 351 gpn_ifstart(struct ifnet *ifp) 352 { 353 struct gpn_softc * const sc = ifp->if_softc; 354 355 for (;;) { 356 struct mbuf *m, *m0; 357 ipm_gpn_desc_t gd; 358 ipm_gpn_desc_t *last_gd; 359 size_t count; 360 361 if (sc->sc_free == 0) { 362 ifp->if_flags |= IFF_OACTIVE; 363 break; 364 } 365 366 IF_DEQUEUE(&ifp->if_snd, m); 367 if (!m) 368 break; 369 370 if ((ifp->if_flags & IFF_UP) == 0) { 371 m_freem(m); 372 continue; 373 } 374 375 /* 376 * Make sure to send any pending acks first. 377 */ 378 if (sc->sc_ack_desc.agd_subtype) { 379 sc->sc_free--; 380 sc->sc_ack_desc.agd_subtype += GPN_ACK0; 381 gemini_ipm_produce(&sc->sc_ack_desc, 1); 382 sc->sc_ack_desc.agd_subtype = 0; 383 } 384 385 /* 386 * Let's find out how many mbufs we are using. 387 */ 388 for (m0 = m, count = 0; m0; m0 = m0->m_next) { 389 if (m0->m_len == 0) 390 continue; 391 count++; 392 } 393 394 /* 395 * Make sure there is always enough room. 396 */ 397 if (sc->sc_free < count 398 || sc->sc_txactive + count > MAX_TXACTIVE) { 399 IF_PREPEND(&ifp->if_snd, m); 400 ifp->if_flags |= IFF_OACTIVE; 401 return; 402 } 403 404 bpf_mtap(ifp, m, BPF_D_OUT); 405 #ifdef GPNDEBUG 406 printf("%s: tx len=%d crc=%#x\n", ifp->if_xname, 407 m->m_pkthdr.len, m_crc32_le(m)); 408 #endif 409 410 last_gd = NULL; 411 gd.gd_tag = IPM_TAG_GPN; 412 gd.gd_subtype = GPN_SOF; 413 gd.gd_pktlen64 = (m->m_pkthdr.len + 63) >> 6; 414 net_stat_ref_t nsr = IF_STAT_GETREF(ifp); 415 for (; m != NULL; m = m0) { 416 struct gpn_txinfo *ti; 417 bus_dmamap_t map; 418 size_t id; 419 int error; 420 421 m0 = m->m_next; 422 m->m_next = NULL; 423 if (m->m_len == 0) { 424 m_free(m); 425 continue; 426 } 427 if (last_gd) { 428 sc->sc_txactive++; 429 sc->sc_free--; 430 gemini_ipm_produce(last_gd, 1); 431 last_gd = NULL; 432 gd.gd_subtype = GPN_MOF; 433 } 434 for (id = sc->sc_lastid; 435 sc->sc_txinfo[id].ti_mbuf != NULL;) { 436 if (++id == __arraycount(sc->sc_txinfo)) 437 id = 0; 438 } 439 KASSERT(id < MAX_TXACTIVE); 440 ti = sc->sc_txinfo + id; 441 map = ti->ti_map; 442 error = bus_dmamap_load(sc->sc_dmat, map, 443 mtod(m, void *), m->m_len, NULL, 444 BUS_DMA_READ | BUS_DMA_NOWAIT); 445 if (error) { 446 if_statinc_ref(nsr, if_oerrors); 447 m_freem(m); 448 break; 449 } 450 bus_dmamap_sync(sc->sc_dmat, map, 0, 451 m->m_len, BUS_DMASYNC_PREREAD); 452 KASSERT(map->dm_nsegs > 0); 453 KASSERT(map->dm_nsegs <= 2); 454 KASSERT(map->dm_segs[0].ds_addr != 0); 455 gd.gd_len1 = map->dm_segs[0].ds_len; 456 gd.gd_addr1 = map->dm_segs[0].ds_addr; 457 if (map->dm_nsegs == 1) { 458 gd.gd_len2 = 0; 459 gd.gd_addr2 = 0; 460 } else { 461 KASSERT(map->dm_segs[0].ds_addr != 0); 462 gd.gd_len2 = map->dm_segs[1].ds_len; 463 gd.gd_addr2 = map->dm_segs[1].ds_addr; 464 } 465 466 gd.gd_txid = id; 467 ti->ti_mbuf = m; 468 last_gd = &gd; 469 if_statadd_ref(nsr, if_obytes, m->m_len); 470 } 471 if_statinc_ref(nsr, if_opackets); 472 IF_STAT_PUTREF(ifp); 473 474 /* 475 * XXX XXX 'last_gd' could be NULL 476 */ 477 last_gd->gd_subtype |= GPN_EOF; 478 479 sc->sc_txactive++; 480 sc->sc_free--; 481 gemini_ipm_produce(last_gd, 1); 482 } 483 } 484 485 static void 486 gpn_ipm_ifup(struct gpn_softc *sc) 487 { 488 sc->sc_remoteup = true; 489 if (sc->sc_if.if_flags & IFF_UP) 490 ifmedia_set(&sc->sc_im, IFM_ETHER | IFM_1000_T | IFM_FDX); 491 } 492 493 static void 494 gpn_ipm_ifdown(struct gpn_softc *sc) 495 { 496 struct gpn_txinfo *ti = sc->sc_txinfo; 497 struct gpn_txinfo * const end_ti = ti + __arraycount(sc->sc_txinfo); 498 499 if (sc->sc_rxmbuf) { 500 m_freem(sc->sc_rxmbuf); 501 sc->sc_rxmbuf = NULL; 502 } 503 504 IF_PURGE(&sc->sc_if.if_snd); 505 506 for (; ti < end_ti; ti++) { 507 if (ti->ti_mbuf == NULL) 508 continue; 509 bus_dmamap_sync(sc->sc_dmat, ti->ti_map, 510 0, ti->ti_mbuf->m_len, BUS_DMASYNC_POSTREAD); 511 bus_dmamap_unload(sc->sc_dmat, ti->ti_map); 512 m_freem(ti->ti_mbuf); 513 ti->ti_mbuf = NULL; 514 } 515 sc->sc_lastid = 0; 516 ifmedia_set(&sc->sc_im, IFM_ETHER | IFM_NONE); 517 sc->sc_remoteup = false; 518 } 519 520 static void 521 gpn_ipm_handler(void *arg, const void *desc) 522 { 523 struct gpn_softc * const sc = arg; 524 const ipm_gpn_desc_t * const gd = desc; 525 const ipm_gpn_ack_desc_t * const agd = desc; 526 int s; 527 528 s = splnet(); 529 530 switch (gd->gd_subtype) { 531 case GPN_ACK14: gpn_free_txid(sc, agd->agd_txids[13]); /* FALLTHROUGH */ 532 case GPN_ACK13: gpn_free_txid(sc, agd->agd_txids[12]); /* FALLTHROUGH */ 533 case GPN_ACK12: gpn_free_txid(sc, agd->agd_txids[11]); /* FALLTHROUGH */ 534 case GPN_ACK11: gpn_free_txid(sc, agd->agd_txids[10]); /* FALLTHROUGH */ 535 case GPN_ACK10: gpn_free_txid(sc, agd->agd_txids[9]); /* FALLTHROUGH */ 536 case GPN_ACK9: gpn_free_txid(sc, agd->agd_txids[8]); /* FALLTHROUGH */ 537 case GPN_ACK8: gpn_free_txid(sc, agd->agd_txids[7]); /* FALLTHROUGH */ 538 case GPN_ACK7: gpn_free_txid(sc, agd->agd_txids[6]); /* FALLTHROUGH */ 539 case GPN_ACK6: gpn_free_txid(sc, agd->agd_txids[5]); /* FALLTHROUGH */ 540 case GPN_ACK5: gpn_free_txid(sc, agd->agd_txids[4]); /* FALLTHROUGH */ 541 case GPN_ACK4: gpn_free_txid(sc, agd->agd_txids[3]); /* FALLTHROUGH */ 542 case GPN_ACK3: gpn_free_txid(sc, agd->agd_txids[2]); /* FALLTHROUGH */ 543 case GPN_ACK2: gpn_free_txid(sc, agd->agd_txids[1]); /* FALLTHROUGH */ 544 case GPN_ACK1: gpn_free_txid(sc, agd->agd_txids[0]); break; 545 case GPN_MOF: 546 case GPN_SOF: 547 case GPN_FRAME: 548 case GPN_EOF: 549 gpn_process_data(sc, gd); 550 break; 551 case GPN_IFUP: 552 gpn_ipm_ifup(sc); 553 break; 554 case GPN_IFDOWN: 555 gpn_ipm_ifdown(sc); 556 break; 557 default: 558 KASSERT(0); 559 } 560 561 splx(s); 562 } 563 564 static int 565 gpn_ifinit(struct ifnet *ifp) 566 { 567 struct gpn_softc * const sc = ifp->if_softc; 568 ipm_gpn_desc_t gd; 569 int error; 570 571 error = gpn_alloc_dmamaps(sc); 572 if (error) 573 return error; 574 575 memset(&gd, 0, sizeof(gd)); 576 gd.gd_tag = IPM_TAG_GPN; 577 gd.gd_subtype = GPN_IFUP; 578 KASSERT(sc->sc_free > 0); 579 sc->sc_free--; 580 gemini_ipm_produce(&gd, 1); 581 582 if (sc->sc_remoteup) 583 ifmedia_set(&sc->sc_im, IFM_ETHER | IFM_1000_T | IFM_FDX); 584 585 ifp->if_flags |= IFF_RUNNING; 586 587 return error; 588 } 589 590 static void 591 gpn_ifstop(struct ifnet *ifp, int disable) 592 { 593 struct gpn_softc * const sc = ifp->if_softc; 594 ipm_gpn_desc_t gd; 595 596 memset(&gd, 0, sizeof(gd)); 597 gd.gd_tag = IPM_TAG_GPN; 598 gd.gd_subtype = GPN_IFDOWN; 599 KASSERT(sc->sc_free > 0); 600 sc->sc_free--; 601 gemini_ipm_produce(&gd, 1); 602 ifp->if_flags &= ~IFF_RUNNING; 603 gpn_ipm_ifdown(sc); 604 605 if (disable) { 606 gpn_free_dmamaps(sc); 607 } 608 } 609 610 static int 611 gpn_ifioctl(struct ifnet *ifp, u_long cmd, void *data) 612 { 613 struct ifaliasreq * const ifra = data; 614 int s, error; 615 616 s = splnet(); 617 618 switch (cmd) { 619 case SIOCSIFPHYADDR: { 620 const struct sockaddr_dl *sdl = satosdl(&ifra->ifra_addr); 621 622 if (sdl->sdl_family != AF_LINK) { 623 error = EINVAL; 624 break; 625 } 626 627 if_set_sadl(ifp, CLLADDR(sdl), ETHER_ADDR_LEN, false); 628 error = 0; 629 break; 630 } 631 default: 632 error = ether_ioctl(ifp, cmd, data); 633 if (error == ENETRESET) 634 error = 0; 635 break; 636 } 637 638 splx(s); 639 return error; 640 } 641 642 static int 643 gpn_mediachange(struct ifnet *ifp) 644 { 645 return 0; 646 } 647 648 static void 649 gpn_mediastatus(struct ifnet *ifp, struct ifmediareq *imr) 650 { 651 struct gpn_softc * const sc = ifp->if_softc; 652 imr->ifm_active = sc->sc_im.ifm_cur->ifm_media; 653 } 654 655 static int 656 gpn_match(device_t parent, cfdata_t cf, void *aux) 657 { 658 return strcmp(gpn_cd.cd_name, aux) == 0; 659 } 660 661 static void 662 gpn_attach(device_t parent, device_t self, void *aux) 663 { 664 struct gpn_softc * const sc = device_private(self); 665 struct ifnet * const ifp = &sc->sc_if; 666 char enaddr[6]; 667 668 enaddr[0] = 2; 669 enaddr[1] = 0; 670 enaddr[2] = 0; 671 enaddr[3] = 0; 672 enaddr[4] = 0; 673 #ifdef GEMINI_MASTER 674 enaddr[5] = 0; 675 #elif defined(GEMINI_SLAVE) 676 enaddr[5] = 1; 677 #else 678 #error not master nor slave 679 #endif 680 681 aprint_normal("\n"); 682 aprint_naive("\n"); 683 sc->sc_dev = self; 684 sc->sc_dmat = &gemini_bus_dma_tag; 685 686 /* Setup ifmedia interface */ 687 sc->sc_ec.ec_ifmedia = &sc->sc_im; 688 ifmedia_init(&sc->sc_im, 0, gpn_mediachange, gpn_mediastatus); 689 /* Pretend we are full-duplex gigabit ethernet. */ 690 ifmedia_add(&sc->sc_im, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL); 691 ifmedia_add(&sc->sc_im, IFM_ETHER | IFM_NONE, 0, NULL); 692 ifmedia_set(&sc->sc_im, IFM_ETHER | IFM_NONE); 693 694 strlcpy(ifp->if_xname, device_xname(self), sizeof(ifp->if_xname)); 695 ifp->if_softc = sc; 696 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 697 ifp->if_ioctl = gpn_ifioctl; 698 ifp->if_start = gpn_ifstart; 699 ifp->if_init = gpn_ifinit; 700 ifp->if_stop = gpn_ifstop; 701 702 IFQ_SET_READY(&ifp->if_snd); 703 704 sc->sc_ec.ec_capabilities = ETHERCAP_VLAN_MTU | ETHERCAP_JUMBO_MTU; 705 706 if_attach(ifp); 707 ether_ifattach(ifp, enaddr); 708 709 sc->sc_free = MAX_TXACTIVE*2; 710 sc->sc_ih = gemini_ipm_register(IPM_TAG_GPN, IPL_SOFTNET, sc->sc_free, 711 gpn_ipm_handler, gpn_ipm_rebate, sc); 712 KASSERT(sc->sc_ih); 713 714 sc->sc_ack_desc.agd_tag = IPM_TAG_GPN; 715 } 716 717 void gpn_print_gd(ipm_gpn_desc_t *); 718 void 719 gpn_print_gd(ipm_gpn_desc_t *gd) 720 { 721 printf("%s: %p\n", __FUNCTION__, gd); 722 printf("\ttag %d, subtype %d, id %d, pktlen64 %d\n", 723 gd->gd_tag, gd->gd_subtype, gd->gd_txid, gd->gd_pktlen64); 724 printf("\tlen1 %d, len2 %d, addr1 %#x, addr2 %#x\n", 725 gd->gd_len1, gd->gd_len2, gd->gd_addr1, gd->gd_addr2); 726 } 727 728 CFATTACH_DECL_NEW(gpn, sizeof(struct gpn_softc), 729 gpn_match, gpn_attach, NULL, NULL); 730