| 1 | /* $NetBSD: dp8390.c,v 1.85 2016/06/10 13:27:13 ozaki-r Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Device driver for National Semiconductor DS8390/WD83C690 based ethernet |
| 5 | * adapters. |
| 6 | * |
| 7 | * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. |
| 8 | * |
| 9 | * Copyright (C) 1993, David Greenman. This software may be used, modified, |
| 10 | * copied, distributed, and sold, in both source and binary form provided that |
| 11 | * the above copyright and these terms are retained. Under no circumstances is |
| 12 | * the author responsible for the proper functioning of this software, nor does |
| 13 | * the author assume any responsibility for damages incurred with its use. |
| 14 | */ |
| 15 | |
| 16 | #include <sys/cdefs.h> |
| 17 | __KERNEL_RCSID(0, "$NetBSD: dp8390.c,v 1.85 2016/06/10 13:27:13 ozaki-r Exp $" ); |
| 18 | |
| 19 | #include "opt_ipkdb.h" |
| 20 | #include "opt_inet.h" |
| 21 | |
| 22 | #include <sys/param.h> |
| 23 | #include <sys/systm.h> |
| 24 | #include <sys/device.h> |
| 25 | #include <sys/errno.h> |
| 26 | #include <sys/ioctl.h> |
| 27 | #include <sys/mbuf.h> |
| 28 | #include <sys/socket.h> |
| 29 | #include <sys/syslog.h> |
| 30 | |
| 31 | #include <sys/rndsource.h> |
| 32 | |
| 33 | #include <net/if.h> |
| 34 | #include <net/if_dl.h> |
| 35 | #include <net/if_types.h> |
| 36 | #include <net/if_media.h> |
| 37 | #include <net/if_ether.h> |
| 38 | |
| 39 | #ifdef INET |
| 40 | #include <netinet/in.h> |
| 41 | #include <netinet/in_systm.h> |
| 42 | #include <netinet/in_var.h> |
| 43 | #include <netinet/ip.h> |
| 44 | #include <netinet/if_inarp.h> |
| 45 | #endif |
| 46 | |
| 47 | |
| 48 | #include <net/bpf.h> |
| 49 | #include <net/bpfdesc.h> |
| 50 | |
| 51 | #include <sys/bus.h> |
| 52 | |
| 53 | #ifdef IPKDB_DP8390 |
| 54 | #include <ipkdb/ipkdb.h> |
| 55 | #endif |
| 56 | |
| 57 | #include <dev/ic/dp8390reg.h> |
| 58 | #include <dev/ic/dp8390var.h> |
| 59 | |
| 60 | #ifdef DEBUG |
| 61 | int dp8390_debug = 0; |
| 62 | #endif |
| 63 | |
| 64 | static void dp8390_xmit(struct dp8390_softc *); |
| 65 | |
| 66 | static void dp8390_read_hdr(struct dp8390_softc *, int, struct dp8390_ring *); |
| 67 | static int dp8390_ring_copy(struct dp8390_softc *, int, void *, u_short); |
| 68 | static int dp8390_write_mbuf(struct dp8390_softc *, struct mbuf *, int); |
| 69 | |
| 70 | static int dp8390_test_mem(struct dp8390_softc *); |
| 71 | |
| 72 | /* |
| 73 | * Standard media init routine for the dp8390. |
| 74 | */ |
| 75 | void |
| 76 | dp8390_media_init(struct dp8390_softc *sc) |
| 77 | { |
| 78 | |
| 79 | ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus); |
| 80 | ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); |
| 81 | ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Do bus-independent setup. |
| 86 | */ |
| 87 | int |
| 88 | dp8390_config(struct dp8390_softc *sc) |
| 89 | { |
| 90 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 91 | int rv; |
| 92 | |
| 93 | rv = 1; |
| 94 | |
| 95 | if (sc->test_mem == NULL) |
| 96 | sc->test_mem = dp8390_test_mem; |
| 97 | if (sc->read_hdr == NULL) |
| 98 | sc->read_hdr = dp8390_read_hdr; |
| 99 | if (sc->recv_int == NULL) |
| 100 | sc->recv_int = dp8390_rint; |
| 101 | if (sc->ring_copy == NULL) |
| 102 | sc->ring_copy = dp8390_ring_copy; |
| 103 | if (sc->write_mbuf == NULL) |
| 104 | sc->write_mbuf = dp8390_write_mbuf; |
| 105 | |
| 106 | /* Allocate one xmit buffer if < 16k, two buffers otherwise. */ |
| 107 | if ((sc->mem_size < 16384) || |
| 108 | (sc->sc_flags & DP8390_NO_MULTI_BUFFERING)) |
| 109 | sc->txb_cnt = 1; |
| 110 | else if (sc->mem_size < 8192 * 3) |
| 111 | sc->txb_cnt = 2; |
| 112 | else |
| 113 | sc->txb_cnt = 3; |
| 114 | |
| 115 | sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; |
| 116 | sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; |
| 117 | sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); |
| 118 | sc->mem_ring = sc->mem_start + |
| 119 | ((sc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); |
| 120 | sc->mem_end = sc->mem_start + sc->mem_size; |
| 121 | |
| 122 | /* Now zero memory and verify that it is clear. */ |
| 123 | if ((*sc->test_mem)(sc)) |
| 124 | goto out; |
| 125 | |
| 126 | /* Set interface to stopped condition (reset). */ |
| 127 | dp8390_stop(sc); |
| 128 | |
| 129 | /* Initialize ifnet structure. */ |
| 130 | strcpy(ifp->if_xname, device_xname(sc->sc_dev)); |
| 131 | ifp->if_softc = sc; |
| 132 | ifp->if_start = dp8390_start; |
| 133 | ifp->if_ioctl = dp8390_ioctl; |
| 134 | if (ifp->if_watchdog == NULL) |
| 135 | ifp->if_watchdog = dp8390_watchdog; |
| 136 | ifp->if_flags = |
| 137 | IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; |
| 138 | IFQ_SET_READY(&ifp->if_snd); |
| 139 | |
| 140 | /* Print additional info when attached. */ |
| 141 | aprint_normal_dev(sc->sc_dev, "Ethernet address %s\n" , |
| 142 | ether_sprintf(sc->sc_enaddr)); |
| 143 | |
| 144 | /* Initialize media goo. */ |
| 145 | (*sc->sc_media_init)(sc); |
| 146 | |
| 147 | /* |
| 148 | * We can support 802.1Q VLAN-sized frames. |
| 149 | */ |
| 150 | sc->sc_ec.ec_capabilities |= ETHERCAP_VLAN_MTU; |
| 151 | |
| 152 | /* Attach the interface. */ |
| 153 | if_attach(ifp); |
| 154 | ether_ifattach(ifp, sc->sc_enaddr); |
| 155 | |
| 156 | rnd_attach_source(&sc->rnd_source, device_xname(sc->sc_dev), |
| 157 | RND_TYPE_NET, RND_FLAG_DEFAULT); |
| 158 | |
| 159 | /* The attach is successful. */ |
| 160 | sc->sc_flags |= DP8390_ATTACHED; |
| 161 | |
| 162 | rv = 0; |
| 163 | out: |
| 164 | return rv; |
| 165 | } |
| 166 | |
| 167 | /* |
| 168 | * Media change callback. |
| 169 | */ |
| 170 | int |
| 171 | dp8390_mediachange(struct ifnet *ifp) |
| 172 | { |
| 173 | struct dp8390_softc *sc = ifp->if_softc; |
| 174 | |
| 175 | if (sc->sc_mediachange) |
| 176 | return (*sc->sc_mediachange)(sc); |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /* |
| 181 | * Media status callback. |
| 182 | */ |
| 183 | void |
| 184 | dp8390_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr) |
| 185 | { |
| 186 | struct dp8390_softc *sc = ifp->if_softc; |
| 187 | |
| 188 | if (sc->sc_enabled == 0) { |
| 189 | ifmr->ifm_active = IFM_ETHER | IFM_NONE; |
| 190 | ifmr->ifm_status = 0; |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | if (sc->sc_mediastatus) |
| 195 | (*sc->sc_mediastatus)(sc, ifmr); |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * Reset interface. |
| 200 | */ |
| 201 | void |
| 202 | dp8390_reset(struct dp8390_softc *sc) |
| 203 | { |
| 204 | int s; |
| 205 | |
| 206 | s = splnet(); |
| 207 | dp8390_stop(sc); |
| 208 | dp8390_init(sc); |
| 209 | splx(s); |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Take interface offline. |
| 214 | */ |
| 215 | void |
| 216 | dp8390_stop(struct dp8390_softc *sc) |
| 217 | { |
| 218 | bus_space_tag_t regt = sc->sc_regt; |
| 219 | bus_space_handle_t regh = sc->sc_regh; |
| 220 | int n = 5000; |
| 221 | |
| 222 | /* Stop everything on the interface, and select page 0 registers. */ |
| 223 | NIC_BARRIER(regt, regh); |
| 224 | NIC_PUT(regt, regh, ED_P0_CR, |
| 225 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); |
| 226 | NIC_BARRIER(regt, regh); |
| 227 | |
| 228 | /* |
| 229 | * Wait for interface to enter stopped state, but limit # of checks to |
| 230 | * 'n' (about 5ms). It shouldn't even take 5us on modern DS8390's, but |
| 231 | * just in case it's an old one. |
| 232 | */ |
| 233 | while (((NIC_GET(regt, regh, ED_P0_ISR) & ED_ISR_RST) == 0) && --n) |
| 234 | DELAY(1); |
| 235 | |
| 236 | if (sc->stop_card != NULL) |
| 237 | (*sc->stop_card)(sc); |
| 238 | } |
| 239 | |
| 240 | /* |
| 241 | * Device timeout/watchdog routine. Entered if the device neglects to generate |
| 242 | * an interrupt after a transmit has been started on it. |
| 243 | */ |
| 244 | |
| 245 | void |
| 246 | dp8390_watchdog(struct ifnet *ifp) |
| 247 | { |
| 248 | struct dp8390_softc *sc = ifp->if_softc; |
| 249 | |
| 250 | log(LOG_ERR, "%s: device timeout\n" , device_xname(sc->sc_dev)); |
| 251 | ++sc->sc_ec.ec_if.if_oerrors; |
| 252 | |
| 253 | dp8390_reset(sc); |
| 254 | } |
| 255 | |
| 256 | /* |
| 257 | * Initialize device. |
| 258 | */ |
| 259 | void |
| 260 | dp8390_init(struct dp8390_softc *sc) |
| 261 | { |
| 262 | bus_space_tag_t regt = sc->sc_regt; |
| 263 | bus_space_handle_t regh = sc->sc_regh; |
| 264 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 265 | uint8_t mcaf[8]; |
| 266 | int i; |
| 267 | |
| 268 | /* |
| 269 | * Initialize the NIC in the exact order outlined in the NS manual. |
| 270 | * This init procedure is "mandatory"...don't change what or when |
| 271 | * things happen. |
| 272 | */ |
| 273 | |
| 274 | /* Reset transmitter flags. */ |
| 275 | ifp->if_timer = 0; |
| 276 | |
| 277 | sc->txb_inuse = 0; |
| 278 | sc->txb_new = 0; |
| 279 | sc->txb_next_tx = 0; |
| 280 | |
| 281 | /* Set interface for page 0, remote DMA complete, stopped. */ |
| 282 | NIC_BARRIER(regt, regh); |
| 283 | NIC_PUT(regt, regh, ED_P0_CR, |
| 284 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); |
| 285 | NIC_BARRIER(regt, regh); |
| 286 | |
| 287 | if (sc->dcr_reg & ED_DCR_LS) { |
| 288 | NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); |
| 289 | } else { |
| 290 | /* |
| 291 | * Set FIFO threshold to 8, No auto-init Remote DMA, byte |
| 292 | * order=80x86, byte-wide DMA xfers, |
| 293 | */ |
| 294 | NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); |
| 295 | } |
| 296 | |
| 297 | /* Clear remote byte count registers. */ |
| 298 | NIC_PUT(regt, regh, ED_P0_RBCR0, 0); |
| 299 | NIC_PUT(regt, regh, ED_P0_RBCR1, 0); |
| 300 | |
| 301 | /* Tell RCR to do nothing for now. */ |
| 302 | NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON | sc->rcr_proto); |
| 303 | |
| 304 | /* Place NIC in internal loopback mode. */ |
| 305 | NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); |
| 306 | |
| 307 | /* Set lower bits of byte addressable framing to 0. */ |
| 308 | if (sc->is790) |
| 309 | NIC_PUT(regt, regh, 0x09, 0); |
| 310 | |
| 311 | /* Initialize receive buffer ring. */ |
| 312 | NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); |
| 313 | NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); |
| 314 | NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); |
| 315 | |
| 316 | /* |
| 317 | * Enable the following interrupts: receive/transmit complete, |
| 318 | * receive/transmit error, and Receiver OverWrite. |
| 319 | * |
| 320 | * Counter overflow and Remote DMA complete are *not* enabled. |
| 321 | */ |
| 322 | NIC_PUT(regt, regh, ED_P0_IMR, |
| 323 | ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE | |
| 324 | ED_IMR_OVWE); |
| 325 | |
| 326 | /* |
| 327 | * Clear all interrupts. A '1' in each bit position clears the |
| 328 | * corresponding flag. |
| 329 | */ |
| 330 | NIC_PUT(regt, regh, ED_P0_ISR, 0xff); |
| 331 | |
| 332 | /* Program command register for page 1. */ |
| 333 | NIC_BARRIER(regt, regh); |
| 334 | NIC_PUT(regt, regh, ED_P0_CR, |
| 335 | sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); |
| 336 | NIC_BARRIER(regt, regh); |
| 337 | |
| 338 | /* Copy out our station address. */ |
| 339 | for (i = 0; i < ETHER_ADDR_LEN; i++) |
| 340 | NIC_PUT(regt, regh, ED_P1_PAR0 + i, CLLADDR(ifp->if_sadl)[i]); |
| 341 | |
| 342 | /* Set multicast filter on chip. */ |
| 343 | dp8390_getmcaf(&sc->sc_ec, mcaf); |
| 344 | for (i = 0; i < 8; i++) |
| 345 | NIC_PUT(regt, regh, ED_P1_MAR0 + i, mcaf[i]); |
| 346 | |
| 347 | /* |
| 348 | * Set current page pointer to one page after the boundary pointer, as |
| 349 | * recommended in the National manual. |
| 350 | */ |
| 351 | sc->next_packet = sc->rec_page_start + 1; |
| 352 | NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); |
| 353 | |
| 354 | /* Program command register for page 0. */ |
| 355 | NIC_BARRIER(regt, regh); |
| 356 | NIC_PUT(regt, regh, ED_P1_CR, |
| 357 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); |
| 358 | NIC_BARRIER(regt, regh); |
| 359 | |
| 360 | /* Accept broadcast and multicast packets by default. */ |
| 361 | i = ED_RCR_AB | ED_RCR_AM | sc->rcr_proto; |
| 362 | if (ifp->if_flags & IFF_PROMISC) { |
| 363 | /* |
| 364 | * Set promiscuous mode. Multicast filter was set earlier so |
| 365 | * that we should receive all multicast packets. |
| 366 | */ |
| 367 | i |= ED_RCR_PRO | ED_RCR_AR | ED_RCR_SEP; |
| 368 | } |
| 369 | NIC_PUT(regt, regh, ED_P0_RCR, i); |
| 370 | |
| 371 | /* Take interface out of loopback. */ |
| 372 | NIC_PUT(regt, regh, ED_P0_TCR, 0); |
| 373 | |
| 374 | /* Do any card-specific initialization, if applicable. */ |
| 375 | if (sc->init_card != NULL) |
| 376 | (*sc->init_card)(sc); |
| 377 | |
| 378 | /* Fire up the interface. */ |
| 379 | NIC_BARRIER(regt, regh); |
| 380 | NIC_PUT(regt, regh, ED_P0_CR, |
| 381 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 382 | |
| 383 | /* Set 'running' flag, and clear output active flag. */ |
| 384 | ifp->if_flags |= IFF_RUNNING; |
| 385 | ifp->if_flags &= ~IFF_OACTIVE; |
| 386 | |
| 387 | /* ...and attempt to start output. */ |
| 388 | dp8390_start(ifp); |
| 389 | } |
| 390 | |
| 391 | /* |
| 392 | * This routine actually starts the transmission on the interface. |
| 393 | */ |
| 394 | static void |
| 395 | dp8390_xmit(struct dp8390_softc *sc) |
| 396 | { |
| 397 | bus_space_tag_t regt = sc->sc_regt; |
| 398 | bus_space_handle_t regh = sc->sc_regh; |
| 399 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 400 | u_short len; |
| 401 | |
| 402 | #ifdef DIAGNOSTIC |
| 403 | if ((sc->txb_next_tx + sc->txb_inuse) % sc->txb_cnt != sc->txb_new) |
| 404 | panic("dp8390_xmit: desync, next_tx=%d inuse=%d cnt=%d new=%d" , |
| 405 | sc->txb_next_tx, sc->txb_inuse, sc->txb_cnt, sc->txb_new); |
| 406 | |
| 407 | if (sc->txb_inuse == 0) |
| 408 | panic("dp8390_xmit: no packets to xmit" ); |
| 409 | #endif |
| 410 | |
| 411 | len = sc->txb_len[sc->txb_next_tx]; |
| 412 | |
| 413 | /* Set NIC for page 0 register access. */ |
| 414 | NIC_BARRIER(regt, regh); |
| 415 | NIC_PUT(regt, regh, ED_P0_CR, |
| 416 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 417 | NIC_BARRIER(regt, regh); |
| 418 | |
| 419 | /* Set TX buffer start page. */ |
| 420 | NIC_PUT(regt, regh, ED_P0_TPSR, |
| 421 | sc->tx_page_start + sc->txb_next_tx * ED_TXBUF_SIZE); |
| 422 | |
| 423 | /* Set TX length. */ |
| 424 | NIC_PUT(regt, regh, ED_P0_TBCR0, len); |
| 425 | NIC_PUT(regt, regh, ED_P0_TBCR1, len >> 8); |
| 426 | |
| 427 | /* Set page 0, remote DMA complete, transmit packet, and *start*. */ |
| 428 | NIC_BARRIER(regt, regh); |
| 429 | NIC_PUT(regt, regh, ED_P0_CR, |
| 430 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); |
| 431 | |
| 432 | /* Point to next transmit buffer slot and wrap if necessary. */ |
| 433 | if (++sc->txb_next_tx == sc->txb_cnt) |
| 434 | sc->txb_next_tx = 0; |
| 435 | |
| 436 | /* Set a timer just in case we never hear from the board again. */ |
| 437 | ifp->if_timer = 2; |
| 438 | } |
| 439 | |
| 440 | /* |
| 441 | * Start output on interface. |
| 442 | * We make two assumptions here: |
| 443 | * 1) that the current priority is set to splnet _before_ this code |
| 444 | * is called *and* is returned to the appropriate priority after |
| 445 | * return |
| 446 | * 2) that the IFF_OACTIVE flag is checked before this code is called |
| 447 | * (i.e. that the output part of the interface is idle) |
| 448 | */ |
| 449 | void |
| 450 | dp8390_start(struct ifnet *ifp) |
| 451 | { |
| 452 | struct dp8390_softc *sc = ifp->if_softc; |
| 453 | struct mbuf *m0; |
| 454 | int buffer; |
| 455 | int len; |
| 456 | |
| 457 | if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) |
| 458 | return; |
| 459 | |
| 460 | outloop: |
| 461 | /* See if there is room to put another packet in the buffer. */ |
| 462 | if (sc->txb_inuse == sc->txb_cnt) { |
| 463 | /* No room. Indicate this to the outside world and exit. */ |
| 464 | ifp->if_flags |= IFF_OACTIVE; |
| 465 | return; |
| 466 | } |
| 467 | IFQ_DEQUEUE(&ifp->if_snd, m0); |
| 468 | if (m0 == NULL) |
| 469 | return; |
| 470 | |
| 471 | /* We need to use m->m_pkthdr.len, so require the header */ |
| 472 | if ((m0->m_flags & M_PKTHDR) == 0) |
| 473 | panic("dp8390_start: no header mbuf" ); |
| 474 | |
| 475 | /* Tap off here if there is a BPF listener. */ |
| 476 | bpf_mtap(ifp, m0); |
| 477 | |
| 478 | /* txb_new points to next open buffer slot. */ |
| 479 | buffer = sc->mem_start + |
| 480 | ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); |
| 481 | |
| 482 | len = (*sc->write_mbuf)(sc, m0, buffer); |
| 483 | |
| 484 | m_freem(m0); |
| 485 | sc->txb_len[sc->txb_new] = len; |
| 486 | |
| 487 | /* Point to next buffer slot and wrap if necessary. */ |
| 488 | if (++sc->txb_new == sc->txb_cnt) |
| 489 | sc->txb_new = 0; |
| 490 | |
| 491 | /* Start the first packet transmitting. */ |
| 492 | if (sc->txb_inuse++ == 0) |
| 493 | dp8390_xmit(sc); |
| 494 | |
| 495 | /* Loop back to the top to possibly buffer more packets. */ |
| 496 | goto outloop; |
| 497 | } |
| 498 | |
| 499 | /* |
| 500 | * Ethernet interface receiver interrupt. |
| 501 | */ |
| 502 | void |
| 503 | dp8390_rint(struct dp8390_softc *sc) |
| 504 | { |
| 505 | bus_space_tag_t regt = sc->sc_regt; |
| 506 | bus_space_handle_t regh = sc->sc_regh; |
| 507 | struct dp8390_ring packet_hdr; |
| 508 | int packet_ptr; |
| 509 | uint16_t len; |
| 510 | uint8_t boundary, current; |
| 511 | uint8_t nlen; |
| 512 | |
| 513 | loop: |
| 514 | /* Set NIC to page 1 registers to get 'current' pointer. */ |
| 515 | NIC_BARRIER(regt, regh); |
| 516 | NIC_PUT(regt, regh, ED_P0_CR, |
| 517 | sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); |
| 518 | NIC_BARRIER(regt, regh); |
| 519 | |
| 520 | /* |
| 521 | * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. |
| 522 | * it points to where new data has been buffered. The 'CURR' (current) |
| 523 | * register points to the logical end of the ring-buffer - i.e. it |
| 524 | * points to where additional new data will be added. We loop here |
| 525 | * until the logical beginning equals the logical end (or in other |
| 526 | * words, until the ring-buffer is empty). |
| 527 | */ |
| 528 | current = NIC_GET(regt, regh, ED_P1_CURR); |
| 529 | if (sc->next_packet == current) |
| 530 | return; |
| 531 | |
| 532 | /* Set NIC to page 0 registers to update boundary register. */ |
| 533 | NIC_BARRIER(regt, regh); |
| 534 | NIC_PUT(regt, regh, ED_P1_CR, |
| 535 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 536 | NIC_BARRIER(regt, regh); |
| 537 | |
| 538 | do { |
| 539 | /* Get pointer to this buffer's header structure. */ |
| 540 | packet_ptr = sc->mem_ring + |
| 541 | ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); |
| 542 | |
| 543 | (*sc->read_hdr)(sc, packet_ptr, &packet_hdr); |
| 544 | len = packet_hdr.count; |
| 545 | |
| 546 | /* |
| 547 | * Try do deal with old, buggy chips that sometimes duplicate |
| 548 | * the low byte of the length into the high byte. We do this |
| 549 | * by simply ignoring the high byte of the length and always |
| 550 | * recalculating it. |
| 551 | * |
| 552 | * NOTE: sc->next_packet is pointing at the current packet. |
| 553 | */ |
| 554 | if (packet_hdr.next_packet >= sc->next_packet) |
| 555 | nlen = (packet_hdr.next_packet - sc->next_packet); |
| 556 | else |
| 557 | nlen = ((packet_hdr.next_packet - sc->rec_page_start) + |
| 558 | (sc->rec_page_stop - sc->next_packet)); |
| 559 | --nlen; |
| 560 | if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) |
| 561 | --nlen; |
| 562 | len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); |
| 563 | #ifdef DIAGNOSTIC |
| 564 | if (len != packet_hdr.count) { |
| 565 | aprint_verbose_dev(sc->sc_dev, "length does not match " |
| 566 | "next packet pointer\n" ); |
| 567 | aprint_verbose_dev(sc->sc_dev, "len %04x nlen %04x " |
| 568 | "start %02x first %02x curr %02x next %02x " |
| 569 | "stop %02x\n" , packet_hdr.count, len, |
| 570 | sc->rec_page_start, sc->next_packet, current, |
| 571 | packet_hdr.next_packet, sc->rec_page_stop); |
| 572 | } |
| 573 | #endif |
| 574 | |
| 575 | /* |
| 576 | * Be fairly liberal about what we allow as a "reasonable" |
| 577 | * length so that a [crufty] packet will make it to BPF (and |
| 578 | * can thus be analyzed). Note that all that is really |
| 579 | * important is that we have a length that will fit into one |
| 580 | * mbuf cluster or less; the upper layer protocols can then |
| 581 | * figure out the length from their own length field(s). |
| 582 | */ |
| 583 | if (len <= MCLBYTES && |
| 584 | packet_hdr.next_packet >= sc->rec_page_start && |
| 585 | packet_hdr.next_packet < sc->rec_page_stop) { |
| 586 | /* Go get packet. */ |
| 587 | dp8390_read(sc, |
| 588 | packet_ptr + sizeof(struct dp8390_ring), |
| 589 | len - sizeof(struct dp8390_ring)); |
| 590 | } else { |
| 591 | /* Really BAD. The ring pointers are corrupted. */ |
| 592 | log(LOG_ERR, "%s: NIC memory corrupt - " |
| 593 | "invalid packet length %d\n" , |
| 594 | device_xname(sc->sc_dev), len); |
| 595 | ++sc->sc_ec.ec_if.if_ierrors; |
| 596 | dp8390_reset(sc); |
| 597 | return; |
| 598 | } |
| 599 | |
| 600 | /* Update next packet pointer. */ |
| 601 | sc->next_packet = packet_hdr.next_packet; |
| 602 | |
| 603 | /* |
| 604 | * Update NIC boundary pointer - being careful to keep it one |
| 605 | * buffer behind (as recommended by NS databook). |
| 606 | */ |
| 607 | boundary = sc->next_packet - 1; |
| 608 | if (boundary < sc->rec_page_start) |
| 609 | boundary = sc->rec_page_stop - 1; |
| 610 | NIC_PUT(regt, regh, ED_P0_BNRY, boundary); |
| 611 | } while (sc->next_packet != current); |
| 612 | |
| 613 | goto loop; |
| 614 | } |
| 615 | |
| 616 | /* Ethernet interface interrupt processor. */ |
| 617 | int |
| 618 | dp8390_intr(void *arg) |
| 619 | { |
| 620 | struct dp8390_softc *sc = arg; |
| 621 | bus_space_tag_t regt = sc->sc_regt; |
| 622 | bus_space_handle_t regh = sc->sc_regh; |
| 623 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 624 | uint8_t isr; |
| 625 | uint8_t rndisr; |
| 626 | |
| 627 | if (sc->sc_enabled == 0 || |
| 628 | !device_is_active(sc->sc_dev)) |
| 629 | return 0; |
| 630 | |
| 631 | /* Set NIC to page 0 registers. */ |
| 632 | NIC_BARRIER(regt, regh); |
| 633 | NIC_PUT(regt, regh, ED_P0_CR, |
| 634 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 635 | NIC_BARRIER(regt, regh); |
| 636 | |
| 637 | isr = NIC_GET(regt, regh, ED_P0_ISR); |
| 638 | if (isr == 0) |
| 639 | return 0; |
| 640 | |
| 641 | rndisr = isr; |
| 642 | |
| 643 | /* Loop until there are no more new interrupts. */ |
| 644 | for (;;) { |
| 645 | /* |
| 646 | * Reset all the bits that we are 'acknowledging' by writing a |
| 647 | * '1' to each bit position that was set. |
| 648 | * (Writing a '1' *clears* the bit.) |
| 649 | */ |
| 650 | NIC_PUT(regt, regh, ED_P0_ISR, isr); |
| 651 | |
| 652 | /* Work around for AX88190 bug */ |
| 653 | if ((sc->sc_flags & DP8390_DO_AX88190_WORKAROUND) != 0) |
| 654 | while ((NIC_GET(regt, regh, ED_P0_ISR) & isr) != 0) { |
| 655 | NIC_PUT(regt, regh, ED_P0_ISR, 0); |
| 656 | NIC_PUT(regt, regh, ED_P0_ISR, isr); |
| 657 | } |
| 658 | |
| 659 | /* |
| 660 | * Handle transmitter interrupts. Handle these first because |
| 661 | * the receiver will reset the board under some conditions. |
| 662 | * |
| 663 | * If the chip was reset while a packet was transmitting, it |
| 664 | * may still deliver a TX interrupt. In this case, just ignore |
| 665 | * the interrupt. |
| 666 | */ |
| 667 | if ((isr & (ED_ISR_PTX | ED_ISR_TXE)) != 0 && |
| 668 | sc->txb_inuse != 0) { |
| 669 | uint8_t collisions = |
| 670 | NIC_GET(regt, regh, ED_P0_NCR) & 0x0f; |
| 671 | |
| 672 | /* |
| 673 | * Check for transmit error. If a TX completed with an |
| 674 | * error, we end up throwing the packet away. Really |
| 675 | * the only error that is possible is excessive |
| 676 | * collisions, and in this case it is best to allow the |
| 677 | * automatic mechanisms of TCP to backoff the flow. Of |
| 678 | * course, with UDP we're screwed, but this is expected |
| 679 | * when a network is heavily loaded. |
| 680 | */ |
| 681 | if ((isr & ED_ISR_TXE) != 0) { |
| 682 | /* |
| 683 | * Excessive collisions (16). |
| 684 | */ |
| 685 | if ((NIC_GET(regt, regh, ED_P0_TSR) |
| 686 | & ED_TSR_ABT) && (collisions == 0)) { |
| 687 | /* |
| 688 | * When collisions total 16, the P0_NCR |
| 689 | * will indicate 0, and the TSR_ABT is |
| 690 | * set. |
| 691 | */ |
| 692 | collisions = 16; |
| 693 | } |
| 694 | |
| 695 | /* Update output errors counter. */ |
| 696 | ++ifp->if_oerrors; |
| 697 | } else { |
| 698 | /* |
| 699 | * Throw away the non-error status bits. |
| 700 | * |
| 701 | * XXX |
| 702 | * It may be useful to detect loss of carrier |
| 703 | * and late collisions here. |
| 704 | */ |
| 705 | (void)NIC_GET(regt, regh, ED_P0_TSR); |
| 706 | |
| 707 | /* |
| 708 | * Update total number of successfully |
| 709 | * transmitted packets. |
| 710 | */ |
| 711 | ++ifp->if_opackets; |
| 712 | } |
| 713 | |
| 714 | /* Clear watchdog timer. */ |
| 715 | ifp->if_timer = 0; |
| 716 | ifp->if_flags &= ~IFF_OACTIVE; |
| 717 | |
| 718 | /* |
| 719 | * Add in total number of collisions on last |
| 720 | * transmission. |
| 721 | */ |
| 722 | ifp->if_collisions += collisions; |
| 723 | |
| 724 | /* |
| 725 | * Decrement buffer in-use count if not zero (can only |
| 726 | * be zero if a transmitter interrupt occurred while not |
| 727 | * actually transmitting). |
| 728 | * If data is ready to transmit, start it transmitting, |
| 729 | * otherwise defer until after handling receiver. |
| 730 | */ |
| 731 | if (--sc->txb_inuse != 0) |
| 732 | dp8390_xmit(sc); |
| 733 | } |
| 734 | |
| 735 | /* Handle receiver interrupts. */ |
| 736 | if ((isr & (ED_ISR_PRX | ED_ISR_RXE | ED_ISR_OVW)) != 0) { |
| 737 | /* |
| 738 | * Overwrite warning. In order to make sure that a |
| 739 | * lockup of the local DMA hasn't occurred, we reset |
| 740 | * and re-init the NIC. The NSC manual suggests only a |
| 741 | * partial reset/re-init is necessary - but some chips |
| 742 | * seem to want more. The DMA lockup has been seen |
| 743 | * only with early rev chips - Methinks this bug was |
| 744 | * fixed in later revs. -DG |
| 745 | */ |
| 746 | if ((isr & ED_ISR_OVW) != 0) { |
| 747 | ++ifp->if_ierrors; |
| 748 | #ifdef DIAGNOSTIC |
| 749 | log(LOG_WARNING, "%s: warning - receiver " |
| 750 | "ring buffer overrun\n" , |
| 751 | device_xname(sc->sc_dev)); |
| 752 | #endif |
| 753 | /* Stop/reset/re-init NIC. */ |
| 754 | dp8390_reset(sc); |
| 755 | } else { |
| 756 | /* |
| 757 | * Receiver Error. One or more of: CRC error, |
| 758 | * frame alignment error FIFO overrun, or |
| 759 | * missed packet. |
| 760 | */ |
| 761 | if ((isr & ED_ISR_RXE) != 0) { |
| 762 | ++ifp->if_ierrors; |
| 763 | #ifdef DEBUG |
| 764 | if (dp8390_debug) { |
| 765 | printf("%s: receive error %x\n" , |
| 766 | device_xname(sc->sc_dev), |
| 767 | NIC_GET(regt, regh, |
| 768 | ED_P0_RSR)); |
| 769 | } |
| 770 | #endif |
| 771 | } |
| 772 | |
| 773 | /* |
| 774 | * Go get the packet(s) |
| 775 | * XXX - Doing this on an error is dubious |
| 776 | * because there shouldn't be any data to get |
| 777 | * (we've configured the interface to not |
| 778 | * accept packets with errors). |
| 779 | */ |
| 780 | (*sc->recv_int)(sc); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | /* |
| 785 | * If it looks like the transmitter can take more data, attempt |
| 786 | * to start output on the interface. This is done after |
| 787 | * handling the receiver to give the receiver priority. |
| 788 | */ |
| 789 | dp8390_start(ifp); |
| 790 | |
| 791 | /* |
| 792 | * Return NIC CR to standard state: page 0, remote DMA |
| 793 | * complete, start (toggling the TXP bit off, even if was just |
| 794 | * set in the transmit routine, is *okay* - it is 'edge' |
| 795 | * triggered from low to high). |
| 796 | */ |
| 797 | NIC_BARRIER(regt, regh); |
| 798 | NIC_PUT(regt, regh, ED_P0_CR, |
| 799 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 800 | NIC_BARRIER(regt, regh); |
| 801 | |
| 802 | /* |
| 803 | * If the Network Talley Counters overflow, read them to reset |
| 804 | * them. It appears that old 8390's won't clear the ISR flag |
| 805 | * otherwise - resulting in an infinite loop. |
| 806 | */ |
| 807 | if ((isr & ED_ISR_CNT) != 0) { |
| 808 | (void)NIC_GET(regt, regh, ED_P0_CNTR0); |
| 809 | (void)NIC_GET(regt, regh, ED_P0_CNTR1); |
| 810 | (void)NIC_GET(regt, regh, ED_P0_CNTR2); |
| 811 | } |
| 812 | |
| 813 | isr = NIC_GET(regt, regh, ED_P0_ISR); |
| 814 | if (isr == 0) |
| 815 | goto out; |
| 816 | } |
| 817 | |
| 818 | out: |
| 819 | rnd_add_uint32(&sc->rnd_source, rndisr); |
| 820 | return 1; |
| 821 | } |
| 822 | |
| 823 | /* |
| 824 | * Process an ioctl request. This code needs some work - it looks pretty ugly. |
| 825 | */ |
| 826 | int |
| 827 | dp8390_ioctl(struct ifnet *ifp, u_long cmd, void *data) |
| 828 | { |
| 829 | struct dp8390_softc *sc = ifp->if_softc; |
| 830 | struct ifaddr *ifa = data; |
| 831 | struct ifreq *ifr = data; |
| 832 | int s, error = 0; |
| 833 | |
| 834 | s = splnet(); |
| 835 | |
| 836 | switch (cmd) { |
| 837 | |
| 838 | case SIOCINITIFADDR: |
| 839 | if ((error = dp8390_enable(sc)) != 0) |
| 840 | break; |
| 841 | ifp->if_flags |= IFF_UP; |
| 842 | |
| 843 | dp8390_init(sc); |
| 844 | switch (ifa->ifa_addr->sa_family) { |
| 845 | #ifdef INET |
| 846 | case AF_INET: |
| 847 | arp_ifinit(ifp, ifa); |
| 848 | break; |
| 849 | #endif |
| 850 | default: |
| 851 | break; |
| 852 | } |
| 853 | break; |
| 854 | |
| 855 | case SIOCSIFFLAGS: |
| 856 | if ((error = ifioctl_common(ifp, cmd, data)) != 0) |
| 857 | break; |
| 858 | switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { |
| 859 | case IFF_RUNNING: |
| 860 | /* |
| 861 | * If interface is marked down and it is running, then |
| 862 | * stop it. |
| 863 | */ |
| 864 | dp8390_stop(sc); |
| 865 | ifp->if_flags &= ~IFF_RUNNING; |
| 866 | dp8390_disable(sc); |
| 867 | break; |
| 868 | case IFF_UP: |
| 869 | /* |
| 870 | * If interface is marked up and it is stopped, then |
| 871 | * start it. |
| 872 | */ |
| 873 | if ((error = dp8390_enable(sc)) != 0) |
| 874 | break; |
| 875 | dp8390_init(sc); |
| 876 | break; |
| 877 | case IFF_UP|IFF_RUNNING: |
| 878 | /* |
| 879 | * Reset the interface to pick up changes in any other |
| 880 | * flags that affect hardware registers. |
| 881 | */ |
| 882 | dp8390_stop(sc); |
| 883 | dp8390_init(sc); |
| 884 | break; |
| 885 | default: |
| 886 | break; |
| 887 | } |
| 888 | break; |
| 889 | |
| 890 | case SIOCADDMULTI: |
| 891 | case SIOCDELMULTI: |
| 892 | if (sc->sc_enabled == 0) { |
| 893 | error = EIO; |
| 894 | break; |
| 895 | } |
| 896 | |
| 897 | /* Update our multicast list. */ |
| 898 | if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { |
| 899 | /* |
| 900 | * Multicast list has changed; set the hardware filter |
| 901 | * accordingly. |
| 902 | */ |
| 903 | if (ifp->if_flags & IFF_RUNNING) { |
| 904 | dp8390_stop(sc); /* XXX for ds_setmcaf? */ |
| 905 | dp8390_init(sc); |
| 906 | } |
| 907 | error = 0; |
| 908 | } |
| 909 | break; |
| 910 | |
| 911 | case SIOCGIFMEDIA: |
| 912 | case SIOCSIFMEDIA: |
| 913 | error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); |
| 914 | break; |
| 915 | |
| 916 | default: |
| 917 | error = ether_ioctl(ifp, cmd, data); |
| 918 | break; |
| 919 | } |
| 920 | |
| 921 | splx(s); |
| 922 | return error; |
| 923 | } |
| 924 | |
| 925 | /* |
| 926 | * Retrieve packet from buffer memory and send to the next level up via |
| 927 | * ether_input(). If there is a BPF listener, give a copy to BPF, too. |
| 928 | */ |
| 929 | void |
| 930 | dp8390_read(struct dp8390_softc *sc, int buf, u_short len) |
| 931 | { |
| 932 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 933 | struct mbuf *m; |
| 934 | |
| 935 | /* Pull packet off interface. */ |
| 936 | m = dp8390_get(sc, buf, len); |
| 937 | if (m == NULL) { |
| 938 | ifp->if_ierrors++; |
| 939 | return; |
| 940 | } |
| 941 | |
| 942 | ifp->if_ipackets++; |
| 943 | |
| 944 | /* |
| 945 | * Check if there's a BPF listener on this interface. |
| 946 | * If so, hand off the raw packet to bpf. |
| 947 | */ |
| 948 | bpf_mtap(ifp, m); |
| 949 | |
| 950 | if_percpuq_enqueue(ifp->if_percpuq, m); |
| 951 | } |
| 952 | |
| 953 | |
| 954 | /* |
| 955 | * Supporting routines. |
| 956 | */ |
| 957 | |
| 958 | /* |
| 959 | * Compute the multicast address filter from the list of multicast addresses we |
| 960 | * need to listen to. |
| 961 | */ |
| 962 | void |
| 963 | dp8390_getmcaf(struct ethercom *ec, uint8_t *af) |
| 964 | { |
| 965 | struct ifnet *ifp = &ec->ec_if; |
| 966 | struct ether_multi *enm; |
| 967 | uint32_t crc; |
| 968 | int i; |
| 969 | struct ether_multistep step; |
| 970 | |
| 971 | /* |
| 972 | * Set up multicast address filter by passing all multicast addresses |
| 973 | * through a crc generator, and then using the high order 6 bits as an |
| 974 | * index into the 64 bit logical address filter. The high order bit |
| 975 | * selects the word, while the rest of the bits select the bit within |
| 976 | * the word. |
| 977 | */ |
| 978 | |
| 979 | if (ifp->if_flags & IFF_PROMISC) { |
| 980 | ifp->if_flags |= IFF_ALLMULTI; |
| 981 | for (i = 0; i < 8; i++) |
| 982 | af[i] = 0xff; |
| 983 | return; |
| 984 | } |
| 985 | for (i = 0; i < 8; i++) |
| 986 | af[i] = 0; |
| 987 | ETHER_FIRST_MULTI(step, ec, enm); |
| 988 | while (enm != NULL) { |
| 989 | if (memcmp(enm->enm_addrlo, enm->enm_addrhi, |
| 990 | sizeof(enm->enm_addrlo)) != 0) { |
| 991 | /* |
| 992 | * We must listen to a range of multicast addresses. |
| 993 | * For now, just accept all multicasts, rather than |
| 994 | * trying to set only those filter bits needed to match |
| 995 | * the range. (At this time, the only use of address |
| 996 | * ranges is for IP multicast routing, for which the |
| 997 | * range is big enough to require all bits set.) |
| 998 | */ |
| 999 | ifp->if_flags |= IFF_ALLMULTI; |
| 1000 | for (i = 0; i < 8; i++) |
| 1001 | af[i] = 0xff; |
| 1002 | return; |
| 1003 | } |
| 1004 | |
| 1005 | crc = ether_crc32_be(enm->enm_addrlo, ETHER_ADDR_LEN); |
| 1006 | |
| 1007 | /* Just want the 6 most significant bits. */ |
| 1008 | crc >>= 26; |
| 1009 | |
| 1010 | /* Turn on the corresponding bit in the filter. */ |
| 1011 | af[crc >> 3] |= 1 << (crc & 0x7); |
| 1012 | |
| 1013 | ETHER_NEXT_MULTI(step, enm); |
| 1014 | } |
| 1015 | ifp->if_flags &= ~IFF_ALLMULTI; |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * Copy data from receive buffer to a new mbuf chain allocating mbufs |
| 1020 | * as needed. Return pointer to first mbuf in chain. |
| 1021 | * sc = dp8390 info (softc) |
| 1022 | * src = pointer in dp8390 ring buffer |
| 1023 | * total_len = amount of data to copy |
| 1024 | */ |
| 1025 | struct mbuf * |
| 1026 | dp8390_get(struct dp8390_softc *sc, int src, u_short total_len) |
| 1027 | { |
| 1028 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1029 | struct mbuf *m, *m0, *newm; |
| 1030 | u_short len; |
| 1031 | |
| 1032 | MGETHDR(m0, M_DONTWAIT, MT_DATA); |
| 1033 | if (m0 == NULL) |
| 1034 | return NULL; |
| 1035 | m_set_rcvif(m0, ifp); |
| 1036 | m0->m_pkthdr.len = total_len; |
| 1037 | len = MHLEN; |
| 1038 | m = m0; |
| 1039 | |
| 1040 | while (total_len > 0) { |
| 1041 | if (total_len >= MINCLSIZE) { |
| 1042 | MCLGET(m, M_DONTWAIT); |
| 1043 | if ((m->m_flags & M_EXT) == 0) |
| 1044 | goto bad; |
| 1045 | len = MCLBYTES; |
| 1046 | } |
| 1047 | |
| 1048 | /* |
| 1049 | * Make sure the data after the Ethernet header is aligned. |
| 1050 | */ |
| 1051 | if (m == m0) { |
| 1052 | char *newdata = (char *) |
| 1053 | ALIGN(m->m_data + sizeof(struct ether_header)) - |
| 1054 | sizeof(struct ether_header); |
| 1055 | len -= newdata - m->m_data; |
| 1056 | m->m_data = newdata; |
| 1057 | } |
| 1058 | |
| 1059 | m->m_len = len = min(total_len, len); |
| 1060 | src = (*sc->ring_copy)(sc, src, mtod(m, void *), len); |
| 1061 | |
| 1062 | total_len -= len; |
| 1063 | if (total_len > 0) { |
| 1064 | MGET(newm, M_DONTWAIT, MT_DATA); |
| 1065 | if (newm == NULL) |
| 1066 | goto bad; |
| 1067 | len = MLEN; |
| 1068 | m = m->m_next = newm; |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | return m0; |
| 1073 | |
| 1074 | bad: |
| 1075 | m_freem(m0); |
| 1076 | return NULL; |
| 1077 | } |
| 1078 | |
| 1079 | |
| 1080 | /* |
| 1081 | * Default driver support functions. |
| 1082 | * |
| 1083 | * NOTE: all support functions assume 8-bit shared memory. |
| 1084 | */ |
| 1085 | /* |
| 1086 | * Zero NIC buffer memory and verify that it is clear. |
| 1087 | */ |
| 1088 | static int |
| 1089 | dp8390_test_mem(struct dp8390_softc *sc) |
| 1090 | { |
| 1091 | bus_space_tag_t buft = sc->sc_buft; |
| 1092 | bus_space_handle_t bufh = sc->sc_bufh; |
| 1093 | int i; |
| 1094 | |
| 1095 | bus_space_set_region_1(buft, bufh, sc->mem_start, 0, sc->mem_size); |
| 1096 | |
| 1097 | for (i = 0; i < sc->mem_size; ++i) { |
| 1098 | if (bus_space_read_1(buft, bufh, sc->mem_start + i)) { |
| 1099 | printf(": failed to clear NIC buffer at offset %x - " |
| 1100 | "check configuration\n" , (sc->mem_start + i)); |
| 1101 | return 1; |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * Read a packet header from the ring, given the source offset. |
| 1110 | */ |
| 1111 | static void |
| 1112 | dp8390_read_hdr(struct dp8390_softc *sc, int src, struct dp8390_ring *hdrp) |
| 1113 | { |
| 1114 | bus_space_tag_t buft = sc->sc_buft; |
| 1115 | bus_space_handle_t bufh = sc->sc_bufh; |
| 1116 | |
| 1117 | /* |
| 1118 | * The byte count includes a 4 byte header that was added by |
| 1119 | * the NIC. |
| 1120 | */ |
| 1121 | hdrp->rsr = bus_space_read_1(buft, bufh, src); |
| 1122 | hdrp->next_packet = bus_space_read_1(buft, bufh, src + 1); |
| 1123 | hdrp->count = bus_space_read_1(buft, bufh, src + 2) | |
| 1124 | (bus_space_read_1(buft, bufh, src + 3) << 8); |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * Copy `amount' bytes from a packet in the ring buffer to a linear |
| 1129 | * destination buffer, given a source offset and destination address. |
| 1130 | * Takes into account ring-wrap. |
| 1131 | */ |
| 1132 | static int |
| 1133 | dp8390_ring_copy(struct dp8390_softc *sc, int src, void *dst, u_short amount) |
| 1134 | { |
| 1135 | bus_space_tag_t buft = sc->sc_buft; |
| 1136 | bus_space_handle_t bufh = sc->sc_bufh; |
| 1137 | u_short tmp_amount; |
| 1138 | |
| 1139 | /* Does copy wrap to lower addr in ring buffer? */ |
| 1140 | if (src + amount > sc->mem_end) { |
| 1141 | tmp_amount = sc->mem_end - src; |
| 1142 | |
| 1143 | /* Copy amount up to end of NIC memory. */ |
| 1144 | bus_space_read_region_1(buft, bufh, src, dst, tmp_amount); |
| 1145 | |
| 1146 | amount -= tmp_amount; |
| 1147 | src = sc->mem_ring; |
| 1148 | dst = (char *)dst + tmp_amount; |
| 1149 | } |
| 1150 | bus_space_read_region_1(buft, bufh, src, dst, amount); |
| 1151 | |
| 1152 | return src + amount; |
| 1153 | } |
| 1154 | |
| 1155 | /* |
| 1156 | * Copy a packet from an mbuf to the transmit buffer on the card. |
| 1157 | * |
| 1158 | * Currently uses an extra buffer/extra memory copy, unless the whole |
| 1159 | * packet fits in one mbuf. |
| 1160 | */ |
| 1161 | static int |
| 1162 | dp8390_write_mbuf(struct dp8390_softc *sc, struct mbuf *m, int buf) |
| 1163 | { |
| 1164 | bus_space_tag_t buft = sc->sc_buft; |
| 1165 | bus_space_handle_t bufh = sc->sc_bufh; |
| 1166 | uint8_t *data; |
| 1167 | int len, totlen = 0; |
| 1168 | |
| 1169 | for (; m ; m = m->m_next) { |
| 1170 | data = mtod(m, uint8_t *); |
| 1171 | len = m->m_len; |
| 1172 | if (len > 0) { |
| 1173 | bus_space_write_region_1(buft, bufh, buf, data, len); |
| 1174 | totlen += len; |
| 1175 | buf += len; |
| 1176 | } |
| 1177 | } |
| 1178 | if (totlen < ETHER_MIN_LEN - ETHER_CRC_LEN) { |
| 1179 | bus_space_set_region_1(buft, bufh, buf, 0, |
| 1180 | ETHER_MIN_LEN - ETHER_CRC_LEN - totlen); |
| 1181 | totlen = ETHER_MIN_LEN - ETHER_CRC_LEN; |
| 1182 | } |
| 1183 | return totlen; |
| 1184 | } |
| 1185 | |
| 1186 | /* |
| 1187 | * Enable power on the interface. |
| 1188 | */ |
| 1189 | int |
| 1190 | dp8390_enable(struct dp8390_softc *sc) |
| 1191 | { |
| 1192 | |
| 1193 | if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { |
| 1194 | if ((*sc->sc_enable)(sc) != 0) { |
| 1195 | aprint_error_dev(sc->sc_dev, |
| 1196 | "device enable failed\n" ); |
| 1197 | return EIO; |
| 1198 | } |
| 1199 | } |
| 1200 | |
| 1201 | sc->sc_enabled = 1; |
| 1202 | return 0; |
| 1203 | } |
| 1204 | |
| 1205 | /* |
| 1206 | * Disable power on the interface. |
| 1207 | */ |
| 1208 | void |
| 1209 | dp8390_disable(struct dp8390_softc *sc) |
| 1210 | { |
| 1211 | |
| 1212 | if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { |
| 1213 | (*sc->sc_disable)(sc); |
| 1214 | sc->sc_enabled = 0; |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | int |
| 1219 | dp8390_activate(device_t self, enum devact act) |
| 1220 | { |
| 1221 | struct dp8390_softc *sc = device_private(self); |
| 1222 | |
| 1223 | switch (act) { |
| 1224 | case DVACT_DEACTIVATE: |
| 1225 | if_deactivate(&sc->sc_ec.ec_if); |
| 1226 | return 0; |
| 1227 | default: |
| 1228 | return EOPNOTSUPP; |
| 1229 | } |
| 1230 | } |
| 1231 | |
| 1232 | int |
| 1233 | dp8390_detach(struct dp8390_softc *sc, int flags) |
| 1234 | { |
| 1235 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1236 | |
| 1237 | /* Succeed now if there's no work to do. */ |
| 1238 | if ((sc->sc_flags & DP8390_ATTACHED) == 0) |
| 1239 | return 0; |
| 1240 | |
| 1241 | /* dp8390_disable() checks sc->sc_enabled */ |
| 1242 | dp8390_disable(sc); |
| 1243 | |
| 1244 | if (sc->sc_media_fini != NULL) |
| 1245 | (*sc->sc_media_fini)(sc); |
| 1246 | |
| 1247 | /* Delete all remaining media. */ |
| 1248 | ifmedia_delete_instance(&sc->sc_media, IFM_INST_ANY); |
| 1249 | |
| 1250 | rnd_detach_source(&sc->rnd_source); |
| 1251 | ether_ifdetach(ifp); |
| 1252 | if_detach(ifp); |
| 1253 | |
| 1254 | return 0; |
| 1255 | } |
| 1256 | |
| 1257 | #ifdef IPKDB_DP8390 |
| 1258 | static void dp8390_ipkdb_hwinit(struct ipkdb_if *); |
| 1259 | static void dp8390_ipkdb_init(struct ipkdb_if *); |
| 1260 | static void dp8390_ipkdb_leave(struct ipkdb_if *); |
| 1261 | static int dp8390_ipkdb_rcv(struct ipkdb_if *, uint8_t *, int); |
| 1262 | static void dp8390_ipkdb_send(struct ipkdb_if *, uint8_t *, int); |
| 1263 | |
| 1264 | /* |
| 1265 | * This is essentially similar to dp8390_config above. |
| 1266 | */ |
| 1267 | int |
| 1268 | dp8390_ipkdb_attach(struct ipkdb_if *kip) |
| 1269 | { |
| 1270 | struct dp8390_softc *sc = kip->port; |
| 1271 | |
| 1272 | if (sc->mem_size < 8192 * 2) |
| 1273 | sc->txb_cnt = 1; |
| 1274 | else if (sc->mem_size < 8192 * 3) |
| 1275 | sc->txb_cnt = 2; |
| 1276 | else |
| 1277 | sc->txb_cnt = 3; |
| 1278 | |
| 1279 | sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; |
| 1280 | sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; |
| 1281 | sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); |
| 1282 | sc->mem_ring = sc->mem_start + |
| 1283 | ((sc->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); |
| 1284 | sc->mem_end = sc->mem_start + sc->mem_size; |
| 1285 | |
| 1286 | dp8390_stop(sc); |
| 1287 | |
| 1288 | kip->start = dp8390_ipkdb_init; |
| 1289 | kip->leave = dp8390_ipkdb_leave; |
| 1290 | kip->receive = dp8390_ipkdb_rcv; |
| 1291 | kip->send = dp8390_ipkdb_send; |
| 1292 | |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
| 1296 | /* |
| 1297 | * Similar to dp8390_init above. |
| 1298 | */ |
| 1299 | static void |
| 1300 | dp8390_ipkdb_hwinit(struct ipkdb_if *kip) |
| 1301 | { |
| 1302 | struct dp8390_softc *sc = kip->port; |
| 1303 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1304 | bus_space_tag_t regt = sc->sc_regt; |
| 1305 | bus_space_handle_t regh = sc->sc_regh; |
| 1306 | int i; |
| 1307 | |
| 1308 | sc->txb_inuse = 0; |
| 1309 | sc->txb_new = 0; |
| 1310 | sc->txb_next_tx = 0; |
| 1311 | dp8390_stop(sc); |
| 1312 | |
| 1313 | if (sc->dcr_reg & ED_DCR_LS) |
| 1314 | NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); |
| 1315 | else |
| 1316 | NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); |
| 1317 | NIC_PUT(regt, regh, ED_P0_RBCR0, 0); |
| 1318 | NIC_PUT(regt, regh, ED_P0_RBCR1, 0); |
| 1319 | NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON | sc->rcr_proto); |
| 1320 | NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); |
| 1321 | if (sc->is790) |
| 1322 | NIC_PUT(regt, regh, 0x09, 0); |
| 1323 | NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); |
| 1324 | NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); |
| 1325 | NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); |
| 1326 | NIC_PUT(regt, regh, ED_P0_IMR, 0); |
| 1327 | NIC_BARRIER(regt, regh); |
| 1328 | NIC_PUT(regt, regh, ED_P0_ISR, 0xff); |
| 1329 | |
| 1330 | NIC_BARRIER(regt, regh); |
| 1331 | NIC_PUT(regt, regh, ED_P0_CR, |
| 1332 | sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); |
| 1333 | NIC_BARRIER(regt, regh); |
| 1334 | |
| 1335 | for (i = 0; i < sizeof kip->myenetaddr; i++) |
| 1336 | NIC_PUT(regt, regh, ED_P1_PAR0 + i, kip->myenetaddr[i]); |
| 1337 | /* multicast filter? */ |
| 1338 | |
| 1339 | sc->next_packet = sc->rec_page_start + 1; |
| 1340 | NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); |
| 1341 | |
| 1342 | NIC_BARRIER(regt, regh); |
| 1343 | NIC_PUT(regt, regh, ED_P1_CR, |
| 1344 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); |
| 1345 | NIC_BARRIER(regt, regh); |
| 1346 | |
| 1347 | /* promiscuous mode? */ |
| 1348 | NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_AB | ED_RCR_AM | sc->rcr_proto); |
| 1349 | NIC_PUT(regt, regh, ED_P0_TCR, 0); |
| 1350 | |
| 1351 | /* card-specific initialization? */ |
| 1352 | |
| 1353 | NIC_BARRIER(regt, regh); |
| 1354 | NIC_PUT(regt, regh, ED_P0_CR, |
| 1355 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 1356 | |
| 1357 | ifp->if_flags &= ~IFF_OACTIVE; |
| 1358 | } |
| 1359 | |
| 1360 | static void |
| 1361 | dp8390_ipkdb_init(struct ipkdb_if *kip) |
| 1362 | { |
| 1363 | struct dp8390_softc *sc = kip->port; |
| 1364 | bus_space_tag_t regt = sc->sc_regt; |
| 1365 | bus_space_handle_t regh = sc->sc_regh; |
| 1366 | uint8_t cmd; |
| 1367 | |
| 1368 | cmd = NIC_GET(regt, regh, ED_P0_CR) & ~(ED_CR_PAGE_3 | ED_CR_STA); |
| 1369 | |
| 1370 | /* Select page 0 */ |
| 1371 | NIC_BARRIER(regt, regh); |
| 1372 | NIC_PUT(regt, regh, ED_P0_CR, cmd | ED_CR_PAGE_0 | ED_CR_STP); |
| 1373 | NIC_BARRIER(regt, regh); |
| 1374 | |
| 1375 | /* If not started, init chip */ |
| 1376 | if ((cmd & ED_CR_STP) != 0) |
| 1377 | dp8390_ipkdb_hwinit(kip); |
| 1378 | |
| 1379 | /* If output active, wait for packets to drain */ |
| 1380 | while (sc->txb_inuse) { |
| 1381 | while ((cmd = (NIC_GET(regt, regh, ED_P0_ISR) & |
| 1382 | (ED_ISR_PTX | ED_ISR_TXE))) == 0) |
| 1383 | DELAY(1); |
| 1384 | NIC_PUT(regt, regh, ED_P0_ISR, cmd); |
| 1385 | if (--sc->txb_inuse) |
| 1386 | dp8390_xmit(sc); |
| 1387 | } |
| 1388 | } |
| 1389 | |
| 1390 | static void |
| 1391 | dp8390_ipkdb_leave(struct ipkdb_if *kip) |
| 1392 | { |
| 1393 | struct dp8390_softc *sc = kip->port; |
| 1394 | struct ifnet *ifp = &sc->sc_ec.ec_if; |
| 1395 | |
| 1396 | ifp->if_timer = 0; |
| 1397 | } |
| 1398 | |
| 1399 | /* |
| 1400 | * Similar to dp8390_intr above. |
| 1401 | */ |
| 1402 | static int |
| 1403 | dp8390_ipkdb_rcv(struct ipkdb_if *kip, uint8_t *buf, int poll) |
| 1404 | { |
| 1405 | struct dp8390_softc *sc = kip->port; |
| 1406 | bus_space_tag_t regt = sc->sc_regt; |
| 1407 | bus_space_handle_t regh = sc->sc_regh; |
| 1408 | uint8_t bnry, current, isr; |
| 1409 | int len, nlen, packet_ptr; |
| 1410 | struct dp8390_ring packet_hdr; |
| 1411 | |
| 1412 | /* Switch to page 0. */ |
| 1413 | NIC_BARRIER(regt, regh); |
| 1414 | NIC_PUT(regt, regh, ED_P0_CR, |
| 1415 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 1416 | NIC_BARRIER(regt, regh); |
| 1417 | |
| 1418 | for (;;) { |
| 1419 | isr = NIC_GET(regt, regh, ED_P0_ISR); |
| 1420 | NIC_PUT(regt, regh, ED_P0_ISR, isr); |
| 1421 | |
| 1422 | if (isr & (ED_ISR_PRX | ED_ISR_TXE)) { |
| 1423 | NIC_GET(regt, regh, ED_P0_NCR); |
| 1424 | NIC_GET(regt, regh, ED_P0_TSR); |
| 1425 | } |
| 1426 | |
| 1427 | if (isr & ED_ISR_OVW) { |
| 1428 | dp8390_ipkdb_hwinit(kip); |
| 1429 | continue; |
| 1430 | } |
| 1431 | |
| 1432 | if (isr & ED_ISR_CNT) { |
| 1433 | NIC_GET(regt, regh, ED_P0_CNTR0); |
| 1434 | NIC_GET(regt, regh, ED_P0_CNTR1); |
| 1435 | NIC_GET(regt, regh, ED_P0_CNTR2); |
| 1436 | } |
| 1437 | |
| 1438 | /* Similar to dp8390_rint above. */ |
| 1439 | NIC_BARRIER(regt, regh); |
| 1440 | NIC_PUT(regt, regh, ED_P0_CR, |
| 1441 | sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); |
| 1442 | NIC_BARRIER(regt, regh); |
| 1443 | |
| 1444 | current = NIC_GET(regt, regh, ED_P1_CURR); |
| 1445 | |
| 1446 | NIC_BARRIER(regt, regh); |
| 1447 | NIC_PUT(regt, regh, ED_P1_CR, |
| 1448 | sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); |
| 1449 | NIC_BARRIER(regt, regh); |
| 1450 | |
| 1451 | if (sc->next_packet == current) { |
| 1452 | if (poll) |
| 1453 | return 0; |
| 1454 | continue; |
| 1455 | } |
| 1456 | |
| 1457 | packet_ptr = sc->mem_ring + |
| 1458 | ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); |
| 1459 | sc->read_hdr(sc, packet_ptr, &packet_hdr); |
| 1460 | len = packet_hdr.count; |
| 1461 | nlen = packet_hdr.next_packet - sc->next_packet; |
| 1462 | if (nlen < 0) |
| 1463 | nlen += sc->rec_page_stop - sc->rec_page_start; |
| 1464 | nlen--; |
| 1465 | if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) |
| 1466 | nlen--; |
| 1467 | len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); |
| 1468 | len -= sizeof(packet_hdr); |
| 1469 | |
| 1470 | if (len <= ETHERMTU && |
| 1471 | packet_hdr.next_packet >= sc->rec_page_start && |
| 1472 | packet_hdr.next_packet < sc->rec_page_stop) { |
| 1473 | sc->ring_copy(sc, packet_ptr + sizeof(packet_hdr), |
| 1474 | buf, len); |
| 1475 | sc->next_packet = packet_hdr.next_packet; |
| 1476 | bnry = sc->next_packet - 1; |
| 1477 | if (bnry < sc->rec_page_start) |
| 1478 | bnry = sc->rec_page_stop - 1; |
| 1479 | NIC_PUT(regt, regh, ED_P0_BNRY, bnry); |
| 1480 | return len; |
| 1481 | } |
| 1482 | |
| 1483 | dp8390_ipkdb_hwinit(kip); |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | static void |
| 1488 | dp8390_ipkdb_send(struct ipkdb_if *kip, uint8_t *buf, int l) |
| 1489 | { |
| 1490 | struct dp8390_softc *sc = kip->port; |
| 1491 | bus_space_tag_t regt = sc->sc_regt; |
| 1492 | bus_space_handle_t regh = sc->sc_regh; |
| 1493 | struct mbuf mb; |
| 1494 | |
| 1495 | mbuf_hdr_init(&mb, MT_DATA, NULL, buf, l); |
| 1496 | mbuf_pkthdr_init(&mb); |
| 1497 | mb.m_pkthdr.len = l; |
| 1498 | mb.m_flags |= M_EXT; |
| 1499 | |
| 1500 | l = sc->write_mbuf(sc, &mb, |
| 1501 | sc->mem_start + ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT)); |
| 1502 | sc->txb_len[sc->txb_new] = max(l, ETHER_MIN_LEN - ETHER_CRC_LEN); |
| 1503 | |
| 1504 | if (++sc->txb_new == sc->txb_cnt) |
| 1505 | sc->txb_new = 0; |
| 1506 | |
| 1507 | sc->txb_inuse++; |
| 1508 | dp8390_xmit(sc); |
| 1509 | |
| 1510 | while ((NIC_GET(regt, regh, ED_P0_ISR) & |
| 1511 | (ED_ISR_PTX | ED_ISR_TXE)) == 0) |
| 1512 | DELAY(1); |
| 1513 | |
| 1514 | sc->txb_inuse--; |
| 1515 | } |
| 1516 | #endif |
| 1517 | |