1 /* $NetBSD: if_gpn.c,v 1.18 2024/06/29 12:11:10 riastradh 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 (at) 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 1.18 2024/06/29 12:11:10 riastradh 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 bool sc_txbusy; 110 void *sc_ih; 111 ipm_gpn_ack_desc_t sc_ack_desc; 112 struct mbuf *sc_rxmbuf; 113 struct gpn_txinfo sc_txinfo[MAX_TXACTIVE]; 114 uint8_t sc_lastid; 115 bool sc_remoteup; /* remote side up? */ 116 }; 117 118 CTASSERT((GPN_SOF | GPN_EOF) == GPN_FRAME); 119 CTASSERT((GPN_SOF & GPN_EOF) == 0); 120 121 extern struct cfdriver gpn_cd; 122 123 static void gpn_ifstart(struct ifnet *); 124 125 #ifdef GPNDEBUG 126 static uint32_t 127 m_crc32_le(struct mbuf *m) 128 { 129 static const uint32_t crctab[] = { 130 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 131 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 132 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 133 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 134 }; 135 uint32_t crc; 136 size_t i; 137 138 crc = 0xffffffffU; /* initial value */ 139 140 for (; m; m = m->m_next) { 141 for (i = 0; i < m->m_len; i++) { 142 crc ^= m->m_data[i]; 143 crc = (crc >> 4) ^ crctab[crc & 0xf]; 144 crc = (crc >> 4) ^ crctab[crc & 0xf]; 145 } 146 } 147 148 return crc; 149 } 150 #endif 151 152 static void 153 gpn_free_dmamaps(struct gpn_softc *sc) 154 { 155 struct gpn_txinfo *ti = sc->sc_txinfo; 156 struct gpn_txinfo * const end_ti = ti + __arraycount(sc->sc_txinfo); 157 158 for (; ti < end_ti; ti++) { 159 if (ti->ti_map == NULL) 160 continue; 161 bus_dmamap_destroy(sc->sc_dmat, ti->ti_map); 162 ti->ti_map = NULL; 163 } 164 } 165 166 static int 167 gpn_alloc_dmamaps(struct gpn_softc *sc) 168 { 169 struct gpn_txinfo *ti = sc->sc_txinfo; 170 struct gpn_txinfo * const end_ti = ti + __arraycount(sc->sc_txinfo); 171 int error; 172 173 for (error = 0; ti < end_ti; ti++) { 174 if (ti->ti_map != NULL) 175 continue; 176 error = bus_dmamap_create(sc->sc_dmat, 177 10000, 2, 8192, 0, 178 BUS_DMA_ALLOCNOW | BUS_DMA_WAITOK, 179 &ti->ti_map); 180 if (error) 181 break; 182 } 183 184 if (error) 185 gpn_free_dmamaps(sc); 186 187 return error; 188 } 189 190 static bool 191 gpn_add_data(struct gpn_softc *sc, bus_addr_t addr, bus_size_t len) 192 { 193 struct mbuf *m, *m0; 194 size_t space; 195 196 m = sc->sc_rxmbuf; 197 KASSERT(m != NULL); 198 199 m->m_pkthdr.len += len; 200 201 while (m->m_next != NULL) 202 m = m->m_next; 203 204 KASSERT(len > 0); 205 space = M_TRAILINGSPACE(m); 206 for (;;) { 207 if (space > 0) { 208 if (len < space) 209 space = len; 210 gemini_ipm_copyin(mtod(m, uint8_t *) + m->m_len, addr, 211 space); 212 len -= space; 213 m->m_len += space; 214 if (len == 0) 215 return true; 216 addr += space; 217 } 218 MGET(m0, M_DONTWAIT, MT_DATA); 219 if (m0 == NULL) 220 break; 221 space = MLEN; 222 if (len > space) { 223 MCLGET(m0, M_DONTWAIT); 224 if (m0->m_flags & M_EXT) 225 space = MCLBYTES; 226 } 227 m->m_len = 0; 228 m->m_next = m0; 229 m = m0; 230 } 231 return false; 232 } 233 234 static void 235 gpn_ack_txid(struct gpn_softc *sc, unsigned int txid) 236 { 237 ipm_gpn_ack_desc_t * const agd = &sc->sc_ack_desc; 238 agd->agd_txids[agd->agd_subtype] = txid; 239 if (++agd->agd_subtype == __arraycount(agd->agd_txids)) { 240 agd->agd_subtype += GPN_ACK0; 241 sc->sc_free--; 242 gemini_ipm_produce(agd, 1); 243 agd->agd_subtype = 0; 244 } 245 } 246 247 static void 248 gpn_process_data(struct gpn_softc *sc, const ipm_gpn_desc_t *gd) 249 { 250 struct ifnet * const ifp = &sc->sc_if; 251 size_t pktlen = gd->gd_pktlen64 * 64; 252 unsigned int subtype = gd->gd_subtype; 253 bool ok; 254 255 if ((subtype & GPN_SOF) == 0 && sc->sc_rxmbuf == NULL) { 256 if_statinc(ifp, if_ierrors); 257 goto out; 258 } 259 260 if ((subtype & GPN_SOF) && sc->sc_rxmbuf != NULL) { 261 if_statinc(ifp, if_ierrors); 262 m_freem(sc->sc_rxmbuf); 263 sc->sc_rxmbuf = NULL; 264 } 265 266 if (sc->sc_rxmbuf == NULL) { 267 struct mbuf *m; 268 MGETHDR(m, M_DONTWAIT, MT_DATA); 269 if (m == NULL) { 270 if_statinc(ifp, if_ierrors); 271 goto out; 272 } 273 if (pktlen > MHLEN - 2) { 274 MCLGET(m, M_DONTWAIT); 275 if ((m->m_flags & M_EXT) == 0) { 276 if_statinc(ifp, if_ierrors); 277 m_free(m); 278 goto out; 279 } 280 } 281 m->m_data += 2; /* makes ethernet payload 32bit aligned */ 282 m->m_len = 0; 283 m->m_pkthdr.len = 0; 284 sc->sc_rxmbuf = m; 285 } 286 287 ok = gpn_add_data(sc, gd->gd_addr1, gd->gd_len1); 288 if (ok && gd->gd_addr2 && gd->gd_len2) 289 ok = gpn_add_data(sc, gd->gd_addr2, gd->gd_len2); 290 if (!ok) { 291 if_statinc(ifp, if_ierrors); 292 m_freem(sc->sc_rxmbuf); 293 sc->sc_rxmbuf = NULL; 294 goto out; 295 } 296 297 if (subtype & GPN_EOF) { 298 struct mbuf *m; 299 m = sc->sc_rxmbuf; 300 sc->sc_rxmbuf = NULL; 301 m_set_rcvif(m, ifp); 302 KASSERT(((m->m_pkthdr.len + 63) >> 6) == gd->gd_pktlen64); 303 #ifdef GPNDEBUG 304 printf("%s: rx len=%d crc=%#x\n", ifp->if_xname, 305 m->m_pkthdr.len, m_crc32_le(m)); 306 #endif 307 if_percpuq_enqueue(ifp->if_percpuq, m); 308 } 309 310 out: 311 gpn_ack_txid(sc, gd->gd_txid); 312 } 313 314 static void 315 gpn_free_txid(struct gpn_softc *sc, size_t txid) 316 { 317 struct gpn_txinfo * const ti = sc->sc_txinfo + txid; 318 319 KASSERT(txid < MAX_TXACTIVE); 320 321 if (ti->ti_mbuf == NULL) 322 return; 323 324 bus_dmamap_sync(sc->sc_dmat, ti->ti_map, 325 0, ti->ti_mbuf->m_len, BUS_DMASYNC_POSTREAD); 326 bus_dmamap_unload(sc->sc_dmat, ti->ti_map); 327 m_freem(ti->ti_mbuf); 328 ti->ti_mbuf = NULL; 329 sc->sc_txactive--; 330 KASSERT(sc->sc_txactive < MAX_TXACTIVE); 331 if (sc->sc_txbusy) { 332 sc->sc_txbusy = false; 333 gpn_ifstart(&sc->sc_if); 334 } 335 } 336 337 static void 338 gpn_ipm_rebate(void *arg, size_t count) 339 { 340 struct gpn_softc * const sc = arg; 341 int s; 342 343 s = splnet(); 344 sc->sc_free += count; 345 346 sc->sc_txbusy = false; 347 gpn_ifstart(&sc->sc_if); 348 splx(s); 349 } 350 351 static void 352 gpn_ifstart(struct ifnet *ifp) 353 { 354 struct gpn_softc * const sc = ifp->if_softc; 355 356 for (;;) { 357 struct mbuf *m, *m0; 358 ipm_gpn_desc_t gd; 359 ipm_gpn_desc_t *last_gd; 360 size_t count; 361 362 if (sc->sc_free == 0) { 363 sc->sc_txbusy = true; 364 break; 365 } 366 367 IF_POLL(&ifp->if_snd, m); 368 if (!m) 369 break; 370 371 if ((ifp->if_flags & IFF_UP) == 0) { 372 m_freem(m); 373 continue; 374 } 375 376 /* 377 * Make sure to send any pending acks first. 378 */ 379 if (sc->sc_ack_desc.agd_subtype) { 380 sc->sc_free--; 381 sc->sc_ack_desc.agd_subtype += GPN_ACK0; 382 gemini_ipm_produce(&sc->sc_ack_desc, 1); 383 sc->sc_ack_desc.agd_subtype = 0; 384 } 385 386 /* 387 * Let's find out how many mbufs we are using. 388 */ 389 for (m0 = m, count = 0; m0; m0 = m0->m_next) { 390 if (m0->m_len == 0) 391 continue; 392 count++; 393 } 394 395 /* 396 * Make sure there is always enough room. 397 */ 398 if (sc->sc_free < count 399 || sc->sc_txactive + count > MAX_TXACTIVE) { 400 sc->sc_txbusy = true; 401 return; 402 } 403 IF_DEQUEUE(&ifp->if_snd, m); 404 405 bpf_mtap(ifp, m, BPF_D_OUT); 406 #ifdef GPNDEBUG 407 printf("%s: tx len=%d crc=%#x\n", ifp->if_xname, 408 m->m_pkthdr.len, m_crc32_le(m)); 409 #endif 410 411 last_gd = NULL; 412 gd.gd_tag = IPM_TAG_GPN; 413 gd.gd_subtype = GPN_SOF; 414 gd.gd_pktlen64 = (m->m_pkthdr.len + 63) >> 6; 415 net_stat_ref_t nsr = IF_STAT_GETREF(ifp); 416 for (; m != NULL; m = m0) { 417 struct gpn_txinfo *ti; 418 bus_dmamap_t map; 419 size_t id; 420 int error; 421 422 m0 = m->m_next; 423 m->m_next = NULL; 424 if (m->m_len == 0) { 425 m_free(m); 426 continue; 427 } 428 if (last_gd) { 429 sc->sc_txactive++; 430 sc->sc_free--; 431 gemini_ipm_produce(last_gd, 1); 432 last_gd = NULL; 433 gd.gd_subtype = GPN_MOF; 434 } 435 for (id = sc->sc_lastid; 436 sc->sc_txinfo[id].ti_mbuf != NULL;) { 437 if (++id == __arraycount(sc->sc_txinfo)) 438 id = 0; 439 } 440 KASSERT(id < MAX_TXACTIVE); 441 ti = sc->sc_txinfo + id; 442 map = ti->ti_map; 443 error = bus_dmamap_load(sc->sc_dmat, map, 444 mtod(m, void *), m->m_len, NULL, 445 BUS_DMA_READ | BUS_DMA_NOWAIT); 446 if (error) { 447 if_statinc_ref(ifp, nsr, if_oerrors); 448 m_freem(m); 449 break; 450 } 451 bus_dmamap_sync(sc->sc_dmat, map, 0, 452 m->m_len, BUS_DMASYNC_PREREAD); 453 KASSERT(map->dm_nsegs > 0); 454 KASSERT(map->dm_nsegs <= 2); 455 KASSERT(map->dm_segs[0].ds_addr != 0); 456 gd.gd_len1 = map->dm_segs[0].ds_len; 457 gd.gd_addr1 = map->dm_segs[0].ds_addr; 458 if (map->dm_nsegs == 1) { 459 gd.gd_len2 = 0; 460 gd.gd_addr2 = 0; 461 } else { 462 KASSERT(map->dm_segs[0].ds_addr != 0); 463 gd.gd_len2 = map->dm_segs[1].ds_len; 464 gd.gd_addr2 = map->dm_segs[1].ds_addr; 465 } 466 467 gd.gd_txid = id; 468 ti->ti_mbuf = m; 469 last_gd = &gd; 470 if_statadd_ref(ifp, nsr, if_obytes, m->m_len); 471 } 472 if_statinc_ref(ifp, nsr, if_opackets); 473 IF_STAT_PUTREF(ifp); 474 475 if (last_gd != NULL) { 476 last_gd->gd_subtype |= GPN_EOF; 477 478 sc->sc_txactive++; 479 sc->sc_free--; 480 gemini_ipm_produce(last_gd, 1); 481 } 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
Indexes created Sun Sep 28 12:09:53 GMT 2025