/* $OpenBSD: smc91cxx.c,v 1.7 2000/02/02 19:09:58 fgsch Exp $ */ /* $NetBSD: smc91cxx.c,v 1.11 1998/08/08 23:51:41 mycroft Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1996 Gardner Buchanan * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Gardner Buchanan. * 4. The name of Gardner Buchanan may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * from FreeBSD Id: if_sn.c,v 1.4 1996/03/18 15:47:16 gardner Exp */ /* * Core driver for the SMC 91Cxx family of Ethernet chips. * * Memory allocation interrupt logic is drived from an SMC 91C90 driver * written for NetBSD/amiga by Michael Hitch. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #if NRND > 0 #include #endif #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif #ifdef NS #include #include #endif #if defined(CCITT) && defined(LLC) #include #include #include #include #include #endif #if NBPFILTER > 0 #include #include #endif #include #include /* XXX Hardware padding doesn't work yet(?) */ #define SMC91CXX_SW_PAD #define ETHER_ADDR_LEN 6 #ifdef SMC_DEBUG const char *smc91cxx_idstrs[] = { NULL, /* 0 */ NULL, /* 1 */ NULL, /* 2 */ "SMC91C90/91C92", /* 3 */ "SMC91C94", /* 4 */ "SMC91C95", /* 5 */ NULL, /* 6 */ "SMC91C100", /* 7 */ NULL, /* 8 */ NULL, /* 9 */ NULL, /* 10 */ NULL, /* 11 */ NULL, /* 12 */ NULL, /* 13 */ NULL, /* 14 */ NULL, /* 15 */ }; #endif /* Supported media types. */ const int smc91cxx_media[] = { IFM_ETHER|IFM_10_T, IFM_ETHER|IFM_10_5, }; #define NSMC91CxxMEDIA (sizeof(smc91cxx_media) / sizeof(smc91cxx_media[0])) struct cfdriver sm_cd = { NULL, "sm", DV_IFNET }; int smc91cxx_mediachange __P((struct ifnet *)); void smc91cxx_mediastatus __P((struct ifnet *, struct ifmediareq *)); int smc91cxx_set_media __P((struct smc91cxx_softc *, int)); void smc91cxx_read __P((struct smc91cxx_softc *)); void smc91cxx_reset __P((struct smc91cxx_softc *)); void smc91cxx_start __P((struct ifnet *)); void smc91cxx_resume __P((struct smc91cxx_softc *)); void smc91cxx_watchdog __P((struct ifnet *)); int smc91cxx_ioctl __P((struct ifnet *, u_long, caddr_t)); int smc91cxx_enable __P((struct smc91cxx_softc *)); void smc91cxx_disable __P((struct smc91cxx_softc *)); /* XXX Should be in a common header file. */ #define ETHER_MAX_LEN 1518 #define ETHER_MIN_LEN 64 #define ETHER_CRC_LEN 4 static __inline int ether_cmp __P((void *, void *)); static __inline int ether_cmp(va, vb) void *va, *vb; { u_int8_t *a = va; u_int8_t *b = vb; return ((a[5] != b[5]) || (a[4] != b[4]) || (a[3] != b[3]) || (a[2] != b[2]) || (a[1] != b[1]) || (a[0] != b[0])); } void smc91cxx_attach(sc, myea) struct smc91cxx_softc *sc; u_int8_t *myea; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; int i, aui; #ifdef SMC_DEBUG const char *idstr; #endif /* Make sure the chip is stopped. */ smc91cxx_stop(sc); #ifdef SMC_DEBUG SMC_SELECT_BANK(sc, 3); tmp = bus_space_read_2(bst, bsh, REVISION_REG_W); idstr = smc91cxx_idstrs[RR_ID(tmp)]; printf("%s: ", sc->sc_dev.dv_xname); if (idstr != NULL) printf("%s, ", idstr); else printf("unknown chip id %d, ", RR_ID(tmp)); printf("revision %d\n", RR_REV(tmp)); #endif /* Read the station address from the chip. */ SMC_SELECT_BANK(sc, 1); if (myea == NULL) { for (i = 0; i < ETHER_ADDR_LEN; i += 2) { tmp = bus_space_read_2(bst, bsh, IAR_ADDR0_REG_W + i); sc->sc_arpcom.ac_enaddr[i + 1] = (tmp >>8) & 0xff; sc->sc_arpcom.ac_enaddr[i] = tmp & 0xff; } } else { bcopy(myea, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN); } printf(": address %s, ", ether_sprintf(sc->sc_arpcom.ac_enaddr)); /* ..and default media. */ tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); printf("utp/aui (default %s)\n", (aui = (tmp & CR_AUI_SELECT)) ? "aui" : "utp"); /* Initialize the ifnet structure. */ bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_softc = sc; ifp->if_start = smc91cxx_start; ifp->if_ioctl = smc91cxx_ioctl; ifp->if_watchdog = smc91cxx_watchdog; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; /* Attach the interface. */ if_attach(ifp); ether_ifattach(ifp); /* Initialize the media structures. */ ifmedia_init(&sc->sc_media, 0, smc91cxx_mediachange, smc91cxx_mediastatus); for (i = 0; i < NSMC91CxxMEDIA; i++) ifmedia_add(&sc->sc_media, smc91cxx_media[i], 0, NULL); ifmedia_set(&sc->sc_media, IFM_ETHER | (aui ? IFM_10_5 : IFM_10_T)); #if NBPFILTER > 0 bpfattach(&sc->sc_arpcom.ac_if.if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif #if NRND > 0 rnd_attach_source(&sc->rnd_source, sc->sc_dev.dv_xname, RND_TYPE_NET); #endif } /* * Change media according to request. */ int smc91cxx_mediachange(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; return (smc91cxx_set_media(sc, sc->sc_media.ifm_media)); } int smc91cxx_set_media(sc, media) struct smc91cxx_softc *sc; int media; { bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; /* * If the interface is not currently powered on, just return. * When it is enabled later, smc91cxx_init() will properly set * up the media for us. */ if (sc->sc_enabled == 0) return (0); if (IFM_TYPE(media) != IFM_ETHER) return (EINVAL); switch (IFM_SUBTYPE(media)) { case IFM_10_T: case IFM_10_5: SMC_SELECT_BANK(sc, 1); tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); if (IFM_SUBTYPE(media) == IFM_10_5) tmp |= CR_AUI_SELECT; else tmp &= ~CR_AUI_SELECT; bus_space_write_2(bst, bsh, CONFIG_REG_W, tmp); delay(20000); /* XXX is this needed? */ break; default: return (EINVAL); } return (0); } /* * Notify the world which media we're using. */ void smc91cxx_mediastatus(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct smc91cxx_softc *sc = ifp->if_softc; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; if (sc->sc_enabled == 0) { ifmr->ifm_active = IFM_ETHER | IFM_NONE; ifmr->ifm_status = 0; return; } SMC_SELECT_BANK(sc, 1); tmp = bus_space_read_2(bst, bsh, CONFIG_REG_W); ifmr->ifm_active = IFM_ETHER | ((tmp & CR_AUI_SELECT) ? IFM_10_5 : IFM_10_T); } /* * Reset and initialize the chip. */ void smc91cxx_init(sc) struct smc91cxx_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int16_t tmp; int s, i; s = splnet(); /* * This resets the registersmostly to defaults, but doesn't * affect the EEPROM. After the reset cycle, we pause briefly * for the chip to recover. * * XXX how long are we really supposed to delay? --thorpej */ SMC_SELECT_BANK(sc, 0); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, RCR_SOFTRESET); delay(100); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0); delay(200); bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0); /* Set the Ethernet address. */ SMC_SELECT_BANK(sc, 1); for (i = 0; i < ETHER_ADDR_LEN; i++ ) bus_space_write_1(bst, bsh, IAR_ADDR0_REG_W + i, sc->sc_arpcom.ac_enaddr[i]); /* * Set the control register to automatically release successfully * transmitted packets (making the best use of our limited memory) * and enable the EPH interrupt on certain TX errors. */ bus_space_write_2(bst, bsh, CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE | CTR_CR_ENABLE | CTR_LE_ENABLE)); /* * Reset the MMU and wait for it to be un-busy. */ SMC_SELECT_BANK(sc, 2); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RESET); while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; /* * Disable all interrupts. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Set current media. */ smc91cxx_set_media(sc, sc->sc_media.ifm_cur->ifm_media); /* * Set the receive filter. We want receive enable and auto * strip of CRC from received packet. If we are in promisc. mode, * then set that bit as well. * * XXX Initialize multicast filter. For now, we just accept * XXX all multicast. */ SMC_SELECT_BANK(sc, 0); tmp = RCR_ENABLE | RCR_STRIP_CRC | RCR_ALMUL; if (ifp->if_flags & IFF_PROMISC) tmp |= RCR_PROMISC; bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, tmp); /* * Set transmitter control to "enabled". */ tmp = TCR_ENABLE; #ifndef SMC91CXX_SW_PAD /* * Enable hardware padding of transmitted packets. * XXX doesn't work? */ tmp |= TCR_PAD_ENABLE; #endif bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, tmp); /* * Now, enable interrupts. */ SMC_SELECT_BANK(sc, 2); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, IM_EPH_INT | IM_RX_OVRN_INT | IM_RCV_INT | IM_TX_INT); /* Interface is now running, with no output active. */ ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; /* * Attempt to start any pending transmission. */ smc91cxx_start(ifp); splx(s); } /* * Start output on an interface. * Must be called at splnet or interrupt level. */ void smc91cxx_start(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int len; struct mbuf *m, *top; u_int16_t length, npages; u_int8_t packetno; int timo, pad; if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) return; again: /* * Peek at the next packet. */ if ((m = ifp->if_snd.ifq_head) == NULL) return; /* * Compute the frame length and set pad to give an overall even * number of bytes. Below, we assume that the packet length * is even. */ for (len = 0, top = m; m != NULL; m = m->m_next) len += m->m_len; pad = (len & 1); /* * We drop packets that are too large. Perhaps we should * truncate them instead? */ if ((len + pad) > (ETHER_MAX_LEN - ETHER_CRC_LEN)) { printf("%s: large packet discarded\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; IF_DEQUEUE(&ifp->if_snd, m); m_freem(m); goto readcheck; } #ifdef SMC91CXX_SW_PAD /* * Not using hardware padding; pad to ETHER_MIN_LEN. */ if (len < (ETHER_MIN_LEN - ETHER_CRC_LEN)) pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len; #endif length = pad + len; /* * The MMU has a 256 byte page size. The MMU expects us to * ask for "npages - 1". We include space for the status word, * byte count, and control bytes in the allocation request. */ npages = (length + 6) >> 8; /* * Now allocate the memory. */ SMC_SELECT_BANK(sc, 2); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ALLOC | npages); timo = MEMORY_WAIT_TIME; do { if (bus_space_read_1(bst, bsh, INTR_STAT_REG_B) & IM_ALLOC_INT) break; delay(1); } while (--timo); packetno = bus_space_read_1(bst, bsh, ALLOC_RESULT_REG_B); if (packetno & ARR_FAILED || timo == 0) { /* * No transmit memory is available. Record the number * of requestd pages and enable the allocation completion * interrupt. Set up the watchdog timer in case we miss * the interrupt. Mark the interface as active so that * no one else attempts to transmit while we're allocating * memory. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_ALLOC_INT); ifp->if_timer = 5; ifp->if_flags |= IFF_OACTIVE; return; } /* * We have a packet number - set the data window. */ bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno); /* * Point to the beginning of the packet. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC /* | 0x0000 */); /* * Send the packet length (+6 for stats, length, and control bytes) * and the status word (set to zeros). */ bus_space_write_2(bst, bsh, DATA_REG_W, 0); bus_space_write_1(bst, bsh, DATA_REG_B, (length + 6) & 0xff); bus_space_write_1(bst, bsh, DATA_REG_B, ((length + 6) >> 8) & 0xff); /* * Get the packet from the kernel. This will include the Ethernet * frame header, MAC address, etc. */ IF_DEQUEUE(&ifp->if_snd, m); /* * Push the packet out to the card. */ for (top = m; m != NULL; m = m->m_next) { /* Words... */ bus_space_write_multi_2(bst, bsh, DATA_REG_W, mtod(m, u_int16_t *), m->m_len >> 1); /* ...and the remaining byte, if any. */ if (m->m_len & 1) bus_space_write_1(bst, bsh, DATA_REG_B, *(u_int8_t *)(mtod(m, u_int8_t *) + (m->m_len - 1))); } #ifdef SMC91CXX_SW_PAD /* * Push out padding. */ while (pad > 1) { bus_space_write_2(bst, bsh, DATA_REG_W, 0); pad -= 2; } if (pad) bus_space_write_1(bst, bsh, DATA_REG_B, 0); #endif /* * Push out control byte and unused packet byte. The control byte * is 0, meaning the packet is even lengthed and no special * CRC handling is necessary. */ bus_space_write_2(bst, bsh, DATA_REG_W, 0); /* * Enable transmit interrupts and let the chip go. Set a watchdog * in case we miss the interrupt. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, bus_space_read_1(bst, bsh, INTR_MASK_REG_B) | IM_TX_INT | IM_TX_EMPTY_INT); bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_ENQUEUE); ifp->if_timer = 5; #if NBPFILTER > 0 /* Hand off a copy to the bpf. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, top); #endif ifp->if_opackets++; m_freem(top); readcheck: /* * Check for incoming pcakets. We don't want to overflow the small * RX FIFO. If nothing has arrived, attempt to queue another * transmit packet. */ if (bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) & FIFO_REMPTY) goto again; } /* * Interrupt service routine. */ int smc91cxx_intr(arg) void *arg; { struct smc91cxx_softc *sc = arg; struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; u_int8_t mask, interrupts, status; u_int16_t packetno, tx_status, card_stats; if (sc->sc_enabled == 0) return (0); SMC_SELECT_BANK(sc, 2); /* * Obtain the current interrupt mask. */ mask = bus_space_read_1(bst, bsh, INTR_MASK_REG_B); /* * Get the set of interrupt which occurred and eliminate any * which are not enabled. */ interrupts = bus_space_read_1(bst, bsh, INTR_STAT_REG_B); status = interrupts & mask; /* Ours? */ if (status == 0) return (0); /* * It's ours; disable all interrupts while we process them. */ bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Receive overrun interrupts. */ if (status & IM_RX_OVRN_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_RX_OVRN_INT); ifp->if_ierrors++; } /* * Receive interrupts. */ if (status & IM_RCV_INT) { #if 1 /* DIAGNOSTIC */ packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W); if (packetno & FIFO_REMPTY) printf("%s: receive interrupt on empty fifo\n", sc->sc_dev.dv_xname); else #endif smc91cxx_read(sc); } /* * Memory allocation interrupts. */ if (status & IM_ALLOC_INT) { /* Disable this interrupt. */ mask &= ~IM_ALLOC_INT; /* * Release the just-allocated memory. We will reallocate * it through the normal start logic. */ while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT); ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; } /* * Transmit complete interrupt. Handle transmission error messages. * This will only be called on error condition because of AUTO RELEASE * mode. */ if (status & IM_TX_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_INT); packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W) & FIFO_TX_MASK; /* * Select this as the packet to read from. */ bus_space_write_1(bst, bsh, PACKET_NUM_REG_B, packetno); /* * Position the pointer to the beginning of the packet. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_AUTOINC | PTR_READ /* | 0x0000 */); /* * Fetch the TX status word. This will be a copy of * the EPH_STATUS_REG_W at the time of the transmission * failure. */ tx_status = bus_space_read_2(bst, bsh, DATA_REG_W); if (tx_status & EPHSR_TX_SUC) printf("%s: successful packet caused TX interrupt?!\n", sc->sc_dev.dv_xname); else ifp->if_oerrors++; if (tx_status & EPHSR_LATCOL) ifp->if_collisions++; /* * Some of these errors disable the transmitter; reenable it. */ SMC_SELECT_BANK(sc, 0); #ifdef SMC91CXX_SW_PAD bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, TCR_ENABLE); #else bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE); #endif /* * Kill the failed packet and wait for the MMU to unbusy. */ SMC_SELECT_BANK(sc, 2); while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_FREEPKT); ifp->if_timer = 0; } /* * Transmit underrun interrupts. We use this opportunity to * update transmit statistics from the card. */ if (status & IM_TX_EMPTY_INT) { bus_space_write_1(bst, bsh, INTR_ACK_REG_B, IM_TX_EMPTY_INT); /* Disable this interrupt. */ mask &= ~IM_TX_EMPTY_INT; SMC_SELECT_BANK(sc, 0); card_stats = bus_space_read_2(bst, bsh, COUNTER_REG_W); /* Single collisions. */ ifp->if_collisions += card_stats & ECR_COLN_MASK; /* Multiple collisions. */ ifp->if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4; SMC_SELECT_BANK(sc, 2); ifp->if_timer = 0; } /* * Other errors. Reset the interface. */ if (status & IM_EPH_INT) { smc91cxx_stop(sc); smc91cxx_init(sc); } /* * Attempt to queue more packets for transmission. */ smc91cxx_start(ifp); /* * Reenable the interrupts we wish to receive now that processing * is complete. */ mask |= bus_space_read_1(bst, bsh, INTR_MASK_REG_B); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, mask); #if NRND > 0 if (status) rnd_add_uint32(&sc->rnd_source, status); #endif return (1); } /* * Read a packet from the card and pass it up to the kernel. * NOTE! WE EXPECT TO BE IN REGISTER WINDOW 2! */ void smc91cxx_read(sc) struct smc91cxx_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; struct ether_header *eh; struct mbuf *m; u_int16_t status, packetno, packetlen; u_int8_t *data; again: /* * Set data pointer to the beginning of the packet. Since * PTR_RCV is set, the packet number will be found automatically * in FIFO_PORTS_REG_W, FIFO_RX_MASK. */ bus_space_write_2(bst, bsh, POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC /* | 0x0000 */); /* * First two words are status and packet length. */ status = bus_space_read_2(bst, bsh, DATA_REG_W); packetlen = bus_space_read_2(bst, bsh, DATA_REG_W); /* * The packet length includes 3 extra words: status, length, * and an extra word that includes the control byte. */ packetlen -= 6; /* * Account for receive errors and discard. */ if (status & RS_ERRORS) { ifp->if_ierrors++; goto out; } /* * Adjust for odd-length packet. */ if (status & RS_ODDFRAME) packetlen++; /* * Allocate a header mbuf. */ MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) goto out; m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = m->m_len = packetlen; /* * Always put the packet in a cluster. * XXX should chain small mbufs if less than threshold. */ MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); ifp->if_ierrors++; printf("%s: can't allocate cluster for incoming packet\n", sc->sc_dev.dv_xname); goto out; } /* * Pull the packet off the interface. */ eh = mtod(m, struct ether_header *); data = mtod(m, u_int8_t *); bus_space_read_multi_2(bst, bsh, DATA_REG_W, (u_int16_t *)data, packetlen >> 1); if (packetlen & 1) { data += packetlen & ~1; *data = bus_space_read_1(bst, bsh, DATA_REG_B); } ifp->if_ipackets++; #if NBPFILTER > 0 /* * Hand the packet off to bpf listeners. If there's a bpf listener, * we need to check if the packet is ours. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif /* * Strip the ethernet header. */ m->m_pkthdr.len = m->m_len = packetlen - sizeof(struct ether_header); m->m_data += sizeof(struct ether_header); ether_input(ifp, eh, m); out: /* * Tell the card to free the memory occupied by this packet. */ while (bus_space_read_2(bst, bsh, MMU_CMD_REG_W) & MMUCR_BUSY) /* XXX bound this loop! */ ; bus_space_write_2(bst, bsh, MMU_CMD_REG_W, MMUCR_RELEASE); /* * Check for another packet. */ packetno = bus_space_read_2(bst, bsh, FIFO_PORTS_REG_W); if (packetno & FIFO_REMPTY) return; goto again; } /* * Process an ioctl request. */ int smc91cxx_ioctl(ifp, cmd, data) struct ifnet *ifp; u_long cmd; caddr_t data; { struct smc91cxx_softc *sc = ifp->if_softc; struct ifaddr *ifa = (struct ifaddr *)data; struct ifreq *ifr = (struct ifreq *)data; int s, error = 0; s = splnet(); switch (cmd) { case SIOCSIFADDR: if ((error = smc91cxx_enable(sc)) != 0) break; ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: smc91cxx_init(sc); arp_ifinit(&sc->sc_arpcom, ifa); break; #endif #ifdef NS case AF_NS: { struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *)LLADDR(ifp->if_sadl); else { bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); } /* * Set new address. Reset, because the receiver * has to be stopped before we can set the new * MAC address. */ smc91cxx_reset(sc); break; } #endif default: smc91cxx_init(sc); break; } break; #if defined(CCITT) && defined(LLC) case SIOCSIFCONF_X25: if ((error = smc91cxx_enable(sc)) != 0) break; ifp->if_flags |= IFF_UP; ifa->ifa_rtrequest = cons_rtrequest; /* XXX */ error = x25_llcglue(PRC_IFUP, ifa->ifa_addr); if (error == 0) smc91cxx_init(sc); break; #endif case SIOCSIFFLAGS: if ((ifp->if_flags & IFF_UP) == 0 && (ifp->if_flags & IFF_RUNNING) != 0) { /* * If interface is marked down and it is running, * stop it. */ smc91cxx_stop(sc); ifp->if_flags &= ~IFF_RUNNING; smc91cxx_disable(sc); } else if ((ifp->if_flags & IFF_UP) != 0 && (ifp->if_flags & IFF_RUNNING) == 0) { /* * If interface is marked up and it is stopped, * start it. */ if ((error = smc91cxx_enable(sc)) != 0) break; smc91cxx_init(sc); } else if (sc->sc_enabled) { /* * Reset the interface to pick up changes in any * other flags that affect hardware registers. */ smc91cxx_reset(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: if (sc->sc_enabled == 0) { error = EIO; break; } error = (cmd == SIOCADDMULTI) ? ether_addmulti(ifr, &sc->sc_arpcom) : ether_delmulti(ifr, &sc->sc_arpcom); if (error == ENETRESET) { /* * Multicast list has changed; set the hardware * filter accordingly. */ smc91cxx_reset(sc); error = 0; } break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); break; default: error = EINVAL; break; } splx(s); return (error); } /* * Reset the interface. */ void smc91cxx_reset(sc) struct smc91cxx_softc *sc; { int s; s = splnet(); smc91cxx_stop(sc); smc91cxx_init(sc); splx(s); } /* * Watchdog timer. */ void smc91cxx_watchdog(ifp) struct ifnet *ifp; { struct smc91cxx_softc *sc = ifp->if_softc; log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++sc->sc_arpcom.ac_if.if_oerrors; smc91cxx_reset(sc); } /* * Stop output on the interface. */ void smc91cxx_stop(sc) struct smc91cxx_softc *sc; { bus_space_tag_t bst = sc->sc_bst; bus_space_handle_t bsh = sc->sc_bsh; /* * Clear interrupt mask; disable all interrupts. */ SMC_SELECT_BANK(sc, 2); bus_space_write_1(bst, bsh, INTR_MASK_REG_B, 0); /* * Disable transmitter and receiver. */ SMC_SELECT_BANK(sc, 0); bus_space_write_2(bst, bsh, RECV_CONTROL_REG_W, 0); bus_space_write_2(bst, bsh, TXMIT_CONTROL_REG_W, 0); /* * Cancel watchdog timer. */ sc->sc_arpcom.ac_if.if_timer = 0; } /* * Enable power on the interface. */ int smc91cxx_enable(sc) struct smc91cxx_softc *sc; { if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { if ((*sc->sc_enable)(sc) != 0) { printf("%s: device enable failed\n", sc->sc_dev.dv_xname); return (EIO); } } sc->sc_enabled = 1; return (0); } /* * Disable power on the interface. */ void smc91cxx_disable(sc) struct smc91cxx_softc *sc; { if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { (*sc->sc_disable)(sc); sc->sc_enabled = 0; } }