mtd803.c revision 1.37
1 /* $NetBSD: mtd803.c,v 1.37 2019/01/22 03:42:26 msaitoh Exp $ */ 2 3 /*- 4 * 5 * Copyright (c) 2002 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Peter Bex <Peter.Bex (at) student.kun.nl>. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * TODO: 35 * - Most importantly, get some bus_dmamap_syncs in the correct places. 36 * I don't have access to a computer with PCI other than i386, and i386 37 * is just such a machine where dmamap_syncs don't do anything. 38 * - Powerhook for when resuming after standby. 39 * - Watchdog stuff doesn't work yet, the system crashes. 40 * - There seems to be a CardBus version of the card. (see datasheet) 41 * Perhaps a detach function is necessary then? (free buffs, stop rx/tx etc) 42 * - When you enable the TXBUN (Tx buffer unavailable) interrupt, it gets 43 * raised every time a packet is sent. Strange, since everything works anyway 44 */ 45 46 #include <sys/cdefs.h> 47 __KERNEL_RCSID(0, "$NetBSD: mtd803.c,v 1.37 2019/01/22 03:42:26 msaitoh Exp $"); 48 49 50 #include <sys/param.h> 51 #include <sys/mbuf.h> 52 #include <sys/systm.h> 53 #include <sys/device.h> 54 #include <sys/socket.h> 55 #include <sys/ioctl.h> 56 #include <sys/syslog.h> 57 58 #include <net/if.h> 59 #include <net/if_ether.h> 60 #include <net/if_media.h> 61 #include <net/bpf.h> 62 63 #ifdef INET 64 #include <netinet/in.h> 65 #include <netinet/if_inarp.h> 66 #include <netinet/in_systm.h> 67 #include <netinet/in_var.h> 68 #include <netinet/ip.h> 69 #endif 70 71 #include <sys/bus.h> 72 73 #include <dev/ic/mtd803reg.h> 74 #include <dev/ic/mtd803var.h> 75 #include <dev/mii/mii.h> 76 #include <dev/mii/miivar.h> 77 78 /* 79 * Device driver for the MTD803 3-in-1 Fast Ethernet Controller 80 * Written by Peter Bex (peter.bex (at) student.kun.nl) 81 * 82 * Datasheet at: http://www.myson.com.tw or http://www.century-semi.com 83 */ 84 85 #define MTD_READ_1(sc, reg) \ 86 bus_space_read_1((sc)->bus_tag, (sc)->bus_handle, (reg)) 87 #define MTD_WRITE_1(sc, reg, data) \ 88 bus_space_write_1((sc)->bus_tag, (sc)->bus_handle, (reg), (data)) 89 90 #define MTD_READ_2(sc, reg) \ 91 bus_space_read_2((sc)->bus_tag, (sc)->bus_handle, (reg)) 92 #define MTD_WRITE_2(sc, reg, data) \ 93 bus_space_write_2((sc)->bus_tag, (sc)->bus_handle, (reg), (data)) 94 95 #define MTD_READ_4(sc, reg) \ 96 bus_space_read_4((sc)->bus_tag, (sc)->bus_handle, (reg)) 97 #define MTD_WRITE_4(sc, reg, data) \ 98 bus_space_write_4((sc)->bus_tag, (sc)->bus_handle, (reg), (data)) 99 100 #define MTD_SETBIT(sc, reg, x) \ 101 MTD_WRITE_4((sc), (reg), MTD_READ_4((sc), (reg)) | (x)) 102 #define MTD_CLRBIT(sc, reg, x) \ 103 MTD_WRITE_4((sc), (reg), MTD_READ_4((sc), (reg)) & ~(x)) 104 105 #define ETHER_CRC32(buf, len) (ether_crc32_be((buf), (len))) 106 107 int mtd_mii_readreg(device_t, int, int, uint16_t *); 108 int mtd_mii_writereg(device_t, int, int, uint16_t); 109 void mtd_mii_statchg(struct ifnet *); 110 111 void mtd_start(struct ifnet *); 112 void mtd_stop(struct ifnet *, int); 113 int mtd_ioctl(struct ifnet *, u_long, void *); 114 void mtd_setmulti(struct mtd_softc *); 115 void mtd_watchdog(struct ifnet *); 116 117 int mtd_init(struct ifnet *); 118 void mtd_reset(struct mtd_softc *); 119 void mtd_shutdown(void *); 120 int mtd_init_desc(struct mtd_softc *); 121 int mtd_put(struct mtd_softc *, int, struct mbuf *); 122 struct mbuf *mtd_get(struct mtd_softc *, int, int); 123 124 int mtd_rxirq(struct mtd_softc *); 125 int mtd_txirq(struct mtd_softc *); 126 int mtd_bufirq(struct mtd_softc *); 127 128 129 int 130 mtd_config(struct mtd_softc *sc) 131 { 132 struct ifnet *ifp = &sc->ethercom.ec_if; 133 int i; 134 135 /* Read station address */ 136 for (i = 0; i < ETHER_ADDR_LEN; ++i) 137 sc->eaddr[i] = MTD_READ_1(sc, MTD_PAR0 + i); 138 139 /* Initialize ifnet structure */ 140 memcpy(ifp->if_xname, device_xname(sc->dev), IFNAMSIZ); 141 ifp->if_softc = sc; 142 ifp->if_init = mtd_init; 143 ifp->if_start = mtd_start; 144 ifp->if_stop = mtd_stop; 145 ifp->if_ioctl = mtd_ioctl; 146 ifp->if_watchdog = mtd_watchdog; 147 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 148 IFQ_SET_READY(&ifp->if_snd); 149 150 /* Setup MII interface */ 151 sc->mii.mii_ifp = ifp; 152 sc->mii.mii_readreg = mtd_mii_readreg; 153 sc->mii.mii_writereg = mtd_mii_writereg; 154 sc->mii.mii_statchg = mtd_mii_statchg; 155 156 sc->ethercom.ec_mii = &sc->mii; 157 ifmedia_init(&sc->mii.mii_media, 0, ether_mediachange, 158 ether_mediastatus); 159 160 mii_attach(sc->dev, &sc->mii, 0xffffffff, MII_PHY_ANY, 0, 0); 161 162 if (LIST_FIRST(&sc->mii.mii_phys) == NULL) { 163 aprint_error_dev(sc->dev, "Unable to configure MII\n"); 164 return 1; 165 } else { 166 ifmedia_set(&sc->mii.mii_media, IFM_ETHER | IFM_AUTO); 167 } 168 169 if (mtd_init_desc(sc)) 170 return 1; 171 172 /* Attach interface */ 173 if_attach(ifp); 174 ether_ifattach(ifp, sc->eaddr); 175 176 /* Initialise random source */ 177 rnd_attach_source(&sc->rnd_src, device_xname(sc->dev), 178 RND_TYPE_NET, RND_FLAG_DEFAULT); 179 180 /* Add shutdown hook to reset card when we reboot */ 181 sc->sd_hook = shutdownhook_establish(mtd_shutdown, sc); 182 183 return 0; 184 } 185 186 187 /* 188 * mtd_init 189 * Must be called at splnet() 190 */ 191 int 192 mtd_init(struct ifnet *ifp) 193 { 194 struct mtd_softc *sc = ifp->if_softc; 195 196 mtd_reset(sc); 197 198 /* 199 * Set cache alignment and burst length. Don't really know what these 200 * mean, so their values are probably suboptimal. 201 */ 202 MTD_WRITE_4(sc, MTD_BCR, MTD_BCR_BLEN16); 203 204 MTD_WRITE_4(sc, MTD_RXTXR, MTD_TX_STFWD | MTD_TX_FDPLX); 205 206 /* Promiscuous mode? */ 207 if (ifp->if_flags & IFF_PROMISC) 208 MTD_SETBIT(sc, MTD_RXTXR, MTD_RX_PROM); 209 else 210 MTD_CLRBIT(sc, MTD_RXTXR, MTD_RX_PROM); 211 212 /* Broadcast mode? */ 213 if (ifp->if_flags & IFF_BROADCAST) 214 MTD_SETBIT(sc, MTD_RXTXR, MTD_RX_ABROAD); 215 else 216 MTD_CLRBIT(sc, MTD_RXTXR, MTD_RX_ABROAD); 217 218 mtd_setmulti(sc); 219 220 /* Enable interrupts */ 221 MTD_WRITE_4(sc, MTD_IMR, MTD_IMR_MASK); 222 MTD_WRITE_4(sc, MTD_ISR, MTD_ISR_ENABLE); 223 224 /* Set descriptor base addresses */ 225 MTD_WRITE_4(sc, MTD_TXLBA, htole32(sc->desc_dma_map->dm_segs[0].ds_addr 226 + sizeof(struct mtd_desc) * MTD_NUM_RXD)); 227 MTD_WRITE_4(sc, MTD_RXLBA, 228 htole32(sc->desc_dma_map->dm_segs[0].ds_addr)); 229 230 /* Enable receiver and transmitter */ 231 MTD_SETBIT(sc, MTD_RXTXR, MTD_RX_ENABLE); 232 MTD_SETBIT(sc, MTD_RXTXR, MTD_TX_ENABLE); 233 234 /* Interface is running */ 235 ifp->if_flags |= IFF_RUNNING; 236 ifp->if_flags &= ~IFF_OACTIVE; 237 238 return 0; 239 } 240 241 242 int 243 mtd_init_desc(struct mtd_softc *sc) 244 { 245 int rseg, err, i; 246 bus_dma_segment_t seg; 247 bus_size_t size; 248 249 /* Allocate memory for descriptors */ 250 size = (MTD_NUM_RXD + MTD_NUM_TXD) * sizeof(struct mtd_desc); 251 252 /* Allocate DMA-safe memory */ 253 if ((err = bus_dmamem_alloc(sc->dma_tag, size, MTD_DMA_ALIGN, 254 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 255 aprint_error_dev(sc->dev, "unable to allocate DMA buffer, error = %d\n", err); 256 return 1; 257 } 258 259 /* Map memory to kernel addressable space */ 260 if ((err = bus_dmamem_map(sc->dma_tag, &seg, 1, size, 261 (void **)&sc->desc, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 262 aprint_error_dev(sc->dev, "unable to map DMA buffer, error = %d\n", err); 263 bus_dmamem_free(sc->dma_tag, &seg, rseg); 264 return 1; 265 } 266 267 /* Create a DMA map */ 268 if ((err = bus_dmamap_create(sc->dma_tag, size, 1, 269 size, 0, BUS_DMA_NOWAIT, &sc->desc_dma_map)) != 0) { 270 aprint_error_dev(sc->dev, "unable to create DMA map, error = %d\n", err); 271 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 272 bus_dmamem_free(sc->dma_tag, &seg, rseg); 273 return 1; 274 } 275 276 /* Load the DMA map */ 277 if ((err = bus_dmamap_load(sc->dma_tag, sc->desc_dma_map, sc->desc, 278 size, NULL, BUS_DMA_NOWAIT)) != 0) { 279 aprint_error_dev(sc->dev, "unable to load DMA map, error = %d\n", 280 err); 281 bus_dmamap_destroy(sc->dma_tag, sc->desc_dma_map); 282 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 283 bus_dmamem_free(sc->dma_tag, &seg, rseg); 284 return 1; 285 } 286 287 /* Allocate memory for the buffers */ 288 size = MTD_NUM_RXD * MTD_RXBUF_SIZE + MTD_NUM_TXD * MTD_TXBUF_SIZE; 289 290 /* Allocate DMA-safe memory */ 291 if ((err = bus_dmamem_alloc(sc->dma_tag, size, MTD_DMA_ALIGN, 292 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) != 0) { 293 aprint_error_dev(sc->dev, "unable to allocate DMA buffer, error = %d\n", 294 err); 295 296 /* Undo DMA map for descriptors */ 297 bus_dmamap_unload(sc->dma_tag, sc->desc_dma_map); 298 bus_dmamap_destroy(sc->dma_tag, sc->desc_dma_map); 299 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 300 bus_dmamem_free(sc->dma_tag, &seg, rseg); 301 return 1; 302 } 303 304 /* Map memory to kernel addressable space */ 305 if ((err = bus_dmamem_map(sc->dma_tag, &seg, 1, size, 306 &sc->buf, BUS_DMA_NOWAIT | BUS_DMA_COHERENT)) != 0) { 307 aprint_error_dev(sc->dev, "unable to map DMA buffer, error = %d\n", 308 err); 309 bus_dmamem_free(sc->dma_tag, &seg, rseg); 310 311 /* Undo DMA map for descriptors */ 312 bus_dmamap_unload(sc->dma_tag, sc->desc_dma_map); 313 bus_dmamap_destroy(sc->dma_tag, sc->desc_dma_map); 314 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 315 bus_dmamem_free(sc->dma_tag, &seg, rseg); 316 return 1; 317 } 318 319 /* Create a DMA map */ 320 if ((err = bus_dmamap_create(sc->dma_tag, size, 1, 321 size, 0, BUS_DMA_NOWAIT, &sc->buf_dma_map)) != 0) { 322 aprint_error_dev(sc->dev, "unable to create DMA map, error = %d\n", 323 err); 324 bus_dmamem_unmap(sc->dma_tag, sc->buf, size); 325 bus_dmamem_free(sc->dma_tag, &seg, rseg); 326 327 /* Undo DMA map for descriptors */ 328 bus_dmamap_unload(sc->dma_tag, sc->desc_dma_map); 329 bus_dmamap_destroy(sc->dma_tag, sc->desc_dma_map); 330 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 331 bus_dmamem_free(sc->dma_tag, &seg, rseg); 332 return 1; 333 } 334 335 /* Load the DMA map */ 336 if ((err = bus_dmamap_load(sc->dma_tag, sc->buf_dma_map, sc->buf, 337 size, NULL, BUS_DMA_NOWAIT)) != 0) { 338 aprint_error_dev(sc->dev, "unable to load DMA map, error = %d\n", 339 err); 340 bus_dmamap_destroy(sc->dma_tag, sc->buf_dma_map); 341 bus_dmamem_unmap(sc->dma_tag, sc->buf, size); 342 bus_dmamem_free(sc->dma_tag, &seg, rseg); 343 344 /* Undo DMA map for descriptors */ 345 bus_dmamap_unload(sc->dma_tag, sc->desc_dma_map); 346 bus_dmamap_destroy(sc->dma_tag, sc->desc_dma_map); 347 bus_dmamem_unmap(sc->dma_tag, (void *)sc->desc, size); 348 bus_dmamem_free(sc->dma_tag, &seg, rseg); 349 return 1; 350 } 351 352 /* Descriptors are stored as a circular linked list */ 353 /* Fill in rx descriptors */ 354 for (i = 0; i < MTD_NUM_RXD; ++i) { 355 sc->desc[i].stat = MTD_RXD_OWNER; 356 if (i == MTD_NUM_RXD - 1) { /* Last descriptor */ 357 /* Link back to first rx descriptor */ 358 sc->desc[i].next = 359 htole32(sc->desc_dma_map->dm_segs[0].ds_addr); 360 } else { 361 /* Link forward to next rx descriptor */ 362 sc->desc[i].next = 363 htole32(sc->desc_dma_map->dm_segs[0].ds_addr 364 + (i + 1) * sizeof(struct mtd_desc)); 365 } 366 sc->desc[i].conf = MTD_RXBUF_SIZE & MTD_RXD_CONF_BUFS; 367 /* Set buffer's address */ 368 sc->desc[i].data = htole32(sc->buf_dma_map->dm_segs[0].ds_addr 369 + i * MTD_RXBUF_SIZE); 370 } 371 372 /* Fill in tx descriptors */ 373 for (/* i = MTD_NUM_RXD */; i < (MTD_NUM_TXD + MTD_NUM_RXD); ++i) { 374 sc->desc[i].stat = 0; /* At least, NOT MTD_TXD_OWNER! */ 375 if (i == (MTD_NUM_RXD + MTD_NUM_TXD - 1)) { /* Last descr */ 376 /* Link back to first tx descriptor */ 377 sc->desc[i].next = 378 htole32(sc->desc_dma_map->dm_segs[0].ds_addr 379 +MTD_NUM_RXD * sizeof(struct mtd_desc)); 380 } else { 381 /* Link forward to next tx descriptor */ 382 sc->desc[i].next = 383 htole32(sc->desc_dma_map->dm_segs[0].ds_addr 384 + (i + 1) * sizeof(struct mtd_desc)); 385 } 386 /* sc->desc[i].conf = MTD_TXBUF_SIZE & MTD_TXD_CONF_BUFS; */ 387 /* Set buffer's address */ 388 sc->desc[i].data = htole32(sc->buf_dma_map->dm_segs[0].ds_addr 389 + MTD_NUM_RXD * MTD_RXBUF_SIZE 390 + (i - MTD_NUM_RXD) * MTD_TXBUF_SIZE); 391 } 392 393 return 0; 394 } 395 396 397 void 398 mtd_mii_statchg(struct ifnet *ifp) 399 { 400 /* Should we do something here? :) */ 401 } 402 403 404 int 405 mtd_mii_readreg(device_t self, int phy, int reg, uint16_t *val) 406 { 407 struct mtd_softc *sc = device_private(self); 408 409 *val = MTD_READ_2(sc, MTD_PHYBASE + reg * 2); 410 411 return 0; 412 } 413 414 415 int 416 mtd_mii_writereg(device_t self, int phy, int reg, uint16_t val) 417 { 418 struct mtd_softc *sc = device_private(self); 419 420 MTD_WRITE_2(sc, MTD_PHYBASE + reg * 2, val); 421 422 return 0; 423 } 424 425 426 int 427 mtd_put(struct mtd_softc *sc, int index, struct mbuf *m) 428 { 429 int len, tlen; 430 char *buf = (char *)sc->buf + MTD_NUM_RXD * MTD_RXBUF_SIZE 431 + index * MTD_TXBUF_SIZE; 432 struct mbuf *n; 433 434 for (tlen = 0; m != NULL; m = n) { 435 len = m->m_len; 436 if (len == 0) { 437 n = m_free(m); 438 continue; 439 } else if (tlen > MTD_TXBUF_SIZE) { 440 /* XXX FIXME: No idea what to do here. */ 441 aprint_error_dev(sc->dev, "packet too large! Size = %i\n", 442 tlen); 443 n = m_free(m); 444 continue; 445 } 446 memcpy(buf, mtod(m, void *), len); 447 buf += len; 448 tlen += len; 449 n = m_free(m); 450 } 451 sc->desc[MTD_NUM_RXD + index].conf = MTD_TXD_CONF_PAD | MTD_TXD_CONF_CRC 452 | MTD_TXD_CONF_IRQC 453 | ((tlen << MTD_TXD_PKTS_SHIFT) & MTD_TXD_CONF_PKTS) 454 | (tlen & MTD_TXD_CONF_BUFS); 455 456 return tlen; 457 } 458 459 460 void 461 mtd_start(struct ifnet *ifp) 462 { 463 struct mtd_softc *sc = ifp->if_softc; 464 struct mbuf *m; 465 int first_tx = sc->cur_tx; 466 467 /* Don't transmit when the interface is busy or inactive */ 468 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 469 return; 470 471 for (;;) { 472 IF_DEQUEUE(&ifp->if_snd, m); 473 474 if (m == NULL) 475 break; 476 477 bpf_mtap(ifp, m, BPF_D_OUT); 478 479 /* Copy mbuf chain into tx buffer */ 480 (void)mtd_put(sc, sc->cur_tx, m); 481 482 if (sc->cur_tx != first_tx) 483 sc->desc[MTD_NUM_RXD + sc->cur_tx].stat = MTD_TXD_OWNER; 484 485 if (++sc->cur_tx >= MTD_NUM_TXD) 486 sc->cur_tx = 0; 487 } 488 /* Mark first & last descriptor */ 489 sc->desc[MTD_NUM_RXD + first_tx].conf |= MTD_TXD_CONF_FSD; 490 491 if (sc->cur_tx == 0) { 492 sc->desc[MTD_NUM_RXD + MTD_NUM_TXD - 1].conf |=MTD_TXD_CONF_LSD; 493 } else { 494 sc->desc[MTD_NUM_RXD + sc->cur_tx - 1].conf |= MTD_TXD_CONF_LSD; 495 } 496 497 /* Give first descriptor to chip to complete transaction */ 498 sc->desc[MTD_NUM_RXD + first_tx].stat = MTD_TXD_OWNER; 499 500 /* Transmit polling demand */ 501 MTD_WRITE_4(sc, MTD_TXPDR, MTD_TXPDR_DEMAND); 502 503 /* XXX FIXME: Set up a watchdog timer */ 504 /* ifp->if_timer = 5; */ 505 } 506 507 508 void 509 mtd_stop(struct ifnet *ifp, int disable) 510 { 511 struct mtd_softc *sc = ifp->if_softc; 512 513 /* Disable transmitter and receiver */ 514 MTD_CLRBIT(sc, MTD_RXTXR, MTD_TX_ENABLE); 515 MTD_CLRBIT(sc, MTD_RXTXR, MTD_RX_ENABLE); 516 517 /* Disable interrupts */ 518 MTD_WRITE_4(sc, MTD_IMR, 0x00000000); 519 520 /* Must do more at disable??... */ 521 if (disable) { 522 /* Delete tx and rx descriptor base addresses */ 523 MTD_WRITE_4(sc, MTD_RXLBA, 0x00000000); 524 MTD_WRITE_4(sc, MTD_TXLBA, 0x00000000); 525 } 526 527 ifp->if_timer = 0; 528 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 529 } 530 531 532 void 533 mtd_watchdog(struct ifnet *ifp) 534 { 535 struct mtd_softc *sc = ifp->if_softc; 536 int s; 537 538 log(LOG_ERR, "%s: device timeout\n", device_xname(sc->dev)); 539 ++sc->ethercom.ec_if.if_oerrors; 540 541 mtd_stop(ifp, 0); 542 543 s = splnet(); 544 mtd_init(ifp); 545 splx(s); 546 547 return; 548 } 549 550 551 int 552 mtd_ioctl(struct ifnet *ifp, u_long cmd, void *data) 553 { 554 struct mtd_softc *sc = ifp->if_softc; 555 int s, error = 0; 556 557 s = splnet(); 558 559 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 560 /* 561 * Multicast list has changed; set the hardware 562 * filter accordingly. 563 */ 564 if (ifp->if_flags & IFF_RUNNING) 565 mtd_setmulti(sc); 566 error = 0; 567 } 568 569 splx(s); 570 return error; 571 } 572 573 574 struct mbuf * 575 mtd_get(struct mtd_softc *sc, int index, int totlen) 576 { 577 struct ifnet *ifp = &sc->ethercom.ec_if; 578 struct mbuf *m, *m0, *newm; 579 int len; 580 char *buf = (char *)sc->buf + index * MTD_RXBUF_SIZE; 581 582 MGETHDR(m0, M_DONTWAIT, MT_DATA); 583 if (m0 == NULL) 584 return NULL; 585 586 m_set_rcvif(m0, ifp); 587 m0->m_pkthdr.len = totlen; 588 m = m0; 589 len = MHLEN; 590 591 while (totlen > 0) { 592 if (totlen >= MINCLSIZE) { 593 MCLGET(m, M_DONTWAIT); 594 if (!(m->m_flags & M_EXT)) { 595 m_freem(m0); 596 return NULL; 597 } 598 len = MCLBYTES; 599 } 600 601 if (m == m0) { 602 char *newdata = (char *) 603 ALIGN(m->m_data + sizeof(struct ether_header)) - 604 sizeof(struct ether_header); 605 len -= newdata - m->m_data; 606 m->m_data = newdata; 607 } 608 609 m->m_len = len = uimin(totlen, len); 610 memcpy(mtod(m, void *), buf, len); 611 buf += len; 612 613 totlen -= len; 614 if (totlen > 0) { 615 MGET(newm, M_DONTWAIT, MT_DATA); 616 if (newm == NULL) { 617 m_freem(m0); 618 return NULL; 619 } 620 len = MLEN; 621 m = m->m_next = newm; 622 } 623 } 624 625 return m0; 626 } 627 628 629 int 630 mtd_rxirq(struct mtd_softc *sc) 631 { 632 struct ifnet *ifp = &sc->ethercom.ec_if; 633 int len; 634 struct mbuf *m; 635 636 for (; !(sc->desc[sc->cur_rx].stat & MTD_RXD_OWNER);) { 637 /* Error summary set? */ 638 if (sc->desc[sc->cur_rx].stat & MTD_RXD_ERRSUM) { 639 aprint_error_dev(sc->dev, "received packet with errors\n"); 640 /* Give up packet, since an error occurred */ 641 sc->desc[sc->cur_rx].stat = MTD_RXD_OWNER; 642 sc->desc[sc->cur_rx].conf = MTD_RXBUF_SIZE & 643 MTD_RXD_CONF_BUFS; 644 ++ifp->if_ierrors; 645 if (++sc->cur_rx >= MTD_NUM_RXD) 646 sc->cur_rx = 0; 647 continue; 648 } 649 /* Get buffer length */ 650 len = (sc->desc[sc->cur_rx].stat & MTD_RXD_FLEN) 651 >> MTD_RXD_FLEN_SHIFT; 652 len -= ETHER_CRC_LEN; 653 654 /* Check packet size */ 655 if (len <= sizeof(struct ether_header)) { 656 aprint_error_dev(sc->dev, "invalid packet size %d; dropping\n", 657 len); 658 sc->desc[sc->cur_rx].stat = MTD_RXD_OWNER; 659 sc->desc[sc->cur_rx].conf = MTD_RXBUF_SIZE & 660 MTD_RXD_CONF_BUFS; 661 ++ifp->if_ierrors; 662 if (++sc->cur_rx >= MTD_NUM_RXD) 663 sc->cur_rx = 0; 664 continue; 665 } 666 667 m = mtd_get(sc, (sc->cur_rx), len); 668 669 /* Give descriptor back to card */ 670 sc->desc[sc->cur_rx].conf = MTD_RXBUF_SIZE & MTD_RXD_CONF_BUFS; 671 sc->desc[sc->cur_rx].stat = MTD_RXD_OWNER; 672 673 if (++sc->cur_rx >= MTD_NUM_RXD) 674 sc->cur_rx = 0; 675 676 if (m == NULL) { 677 aprint_error_dev(sc->dev, "error pulling packet off interface\n"); 678 ++ifp->if_ierrors; 679 continue; 680 } 681 682 /* Pass the packet up */ 683 if_percpuq_enqueue(ifp->if_percpuq, m); 684 } 685 686 return 1; 687 } 688 689 690 int 691 mtd_txirq(struct mtd_softc *sc) 692 { 693 struct ifnet *ifp = &sc->ethercom.ec_if; 694 695 /* Clear timeout */ 696 ifp->if_timer = 0; 697 698 ifp->if_flags &= ~IFF_OACTIVE; 699 ++ifp->if_opackets; 700 701 /* XXX FIXME If there is some queued, do an mtd_start? */ 702 703 return 1; 704 } 705 706 707 int 708 mtd_bufirq(struct mtd_softc *sc) 709 { 710 struct ifnet *ifp = &sc->ethercom.ec_if; 711 712 /* Clear timeout */ 713 ifp->if_timer = 0; 714 715 /* XXX FIXME: Do something here to make sure we get some buffers! */ 716 717 return 1; 718 } 719 720 721 int 722 mtd_irq_h(void *args) 723 { 724 struct mtd_softc *sc = args; 725 struct ifnet *ifp = &sc->ethercom.ec_if; 726 u_int32_t status; 727 int r = 0; 728 729 if (!(ifp->if_flags & IFF_RUNNING) || !device_is_active(sc->dev)) 730 return 0; 731 732 /* Disable interrupts */ 733 MTD_WRITE_4(sc, MTD_IMR, 0x00000000); 734 735 for(;;) { 736 status = MTD_READ_4(sc, MTD_ISR); 737 738 /* Add random seed before masking out bits */ 739 if (status) 740 rnd_add_uint32(&sc->rnd_src, status); 741 742 status &= MTD_ISR_MASK; 743 if (!status) /* We didn't ask for this */ 744 break; 745 746 MTD_WRITE_4(sc, MTD_ISR, status); 747 748 /* NOTE: Perhaps we should reset with some of these errors? */ 749 750 if (status & MTD_ISR_RXBUN) { 751 aprint_error_dev(sc->dev, "receive buffer unavailable\n"); 752 ++ifp->if_ierrors; 753 } 754 755 if (status & MTD_ISR_RXERR) { 756 aprint_error_dev(sc->dev, "receive error\n"); 757 ++ifp->if_ierrors; 758 } 759 760 if (status & MTD_ISR_TXBUN) { 761 aprint_error_dev(sc->dev, "transmit buffer unavailable\n"); 762 ++ifp->if_ierrors; 763 } 764 765 if ((status & MTD_ISR_PDF)) { 766 aprint_error_dev(sc->dev, "parallel detection fault\n"); 767 ++ifp->if_ierrors; 768 } 769 770 if (status & MTD_ISR_FBUSERR) { 771 aprint_error_dev(sc->dev, "fatal bus error\n"); 772 ++ifp->if_ierrors; 773 } 774 775 if (status & MTD_ISR_TARERR) { 776 aprint_error_dev(sc->dev, "target error\n"); 777 ++ifp->if_ierrors; 778 } 779 780 if (status & MTD_ISR_MASTERR) { 781 aprint_error_dev(sc->dev, "master error\n"); 782 ++ifp->if_ierrors; 783 } 784 785 if (status & MTD_ISR_PARERR) { 786 aprint_error_dev(sc->dev, "parity error\n"); 787 ++ifp->if_ierrors; 788 } 789 790 if (status & MTD_ISR_RXIRQ) /* Receive interrupt */ 791 r |= mtd_rxirq(sc); 792 793 if (status & MTD_ISR_TXIRQ) /* Transmit interrupt */ 794 r |= mtd_txirq(sc); 795 796 if (status & MTD_ISR_TXEARLY) /* Transmit early */ 797 r |= mtd_txirq(sc); 798 799 if (status & MTD_ISR_TXBUN) /* Transmit buffer n/a */ 800 r |= mtd_bufirq(sc); 801 802 } 803 804 /* Enable interrupts */ 805 MTD_WRITE_4(sc, MTD_IMR, MTD_IMR_MASK); 806 807 return r; 808 } 809 810 811 void 812 mtd_setmulti(struct mtd_softc *sc) 813 { 814 struct ifnet *ifp = &sc->ethercom.ec_if; 815 u_int32_t rxtx_stat; 816 u_int32_t hash[2] = {0, 0}; 817 u_int32_t crc; 818 struct ether_multi *enm; 819 struct ether_multistep step; 820 int mcnt = 0; 821 822 /* Get old status */ 823 rxtx_stat = MTD_READ_4(sc, MTD_RXTXR); 824 825 if ((ifp->if_flags & IFF_ALLMULTI) || (ifp->if_flags & IFF_PROMISC)) { 826 rxtx_stat |= MTD_RX_AMULTI; 827 MTD_WRITE_4(sc, MTD_RXTXR, rxtx_stat); 828 MTD_WRITE_4(sc, MTD_MAR0, MTD_ALL_ADDR); 829 MTD_WRITE_4(sc, MTD_MAR1, MTD_ALL_ADDR); 830 return; 831 } 832 833 ETHER_FIRST_MULTI(step, &sc->ethercom, enm); 834 while (enm != NULL) { 835 /* We need the 6 most significant bits of the CRC */ 836 crc = ETHER_CRC32(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26; 837 838 hash[crc >> 5] |= 1 << (crc & 0xf); 839 840 ++mcnt; 841 ETHER_NEXT_MULTI(step, enm); 842 } 843 844 /* Accept multicast bit needs to be on? */ 845 if (mcnt) 846 rxtx_stat |= MTD_RX_AMULTI; 847 else 848 rxtx_stat &= ~MTD_RX_AMULTI; 849 850 /* Write out the hash */ 851 MTD_WRITE_4(sc, MTD_MAR0, hash[0]); 852 MTD_WRITE_4(sc, MTD_MAR1, hash[1]); 853 MTD_WRITE_4(sc, MTD_RXTXR, rxtx_stat); 854 } 855 856 857 void 858 mtd_reset(struct mtd_softc *sc) 859 { 860 int i; 861 862 MTD_SETBIT(sc, MTD_BCR, MTD_BCR_RESET); 863 864 /* Reset descriptor status */ 865 sc->cur_tx = 0; 866 sc->cur_rx = 0; 867 868 /* Wait until done with reset */ 869 for (i = 0; i < MTD_TIMEOUT; ++i) { 870 DELAY(10); 871 if (!(MTD_READ_4(sc, MTD_BCR) & MTD_BCR_RESET)) 872 break; 873 } 874 875 if (i == MTD_TIMEOUT) { 876 aprint_error_dev(sc->dev, "reset timed out\n"); 877 } 878 879 /* Wait a little so chip can stabilize */ 880 DELAY(1000); 881 } 882 883 884 void 885 mtd_shutdown (void *arg) 886 { 887 struct mtd_softc *sc = arg; 888 struct ifnet *ifp = &sc->ethercom.ec_if; 889 890 rnd_detach_source(&sc->rnd_src); 891 mtd_stop(ifp, 1); 892 } 893
Indexes created Wed Sep 24 05:09:52 GMT 2025