/* $NetBSD: gem.c,v 1.1 2001/09/16 00:11:43 eeh Exp $ */ /* * * Copyright (C) 2001 Eduardo Horvath. * 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. * * 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. * */ /* * Driver for Sun GEM ethernet controllers. */ #define GEM_DEBUG int gem_opdebug = 0; #include "bpfilter.h" #include "vlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #if NBPFILTER > 0 #include #endif #if NVLAN > 0 #include #endif #include #include #include #include #include #include #include #define TRIES 10000 struct cfdriver gem_cd = { NULL, "gem", DV_IFNET }; void gem_start __P((struct ifnet *)); void gem_stop __P((struct ifnet *, int)); int gem_ioctl __P((struct ifnet *, u_long, caddr_t)); void gem_tick __P((void *)); void gem_watchdog __P((struct ifnet *)); void gem_shutdown __P((void *)); int gem_init __P((struct ifnet *)); void gem_init_regs(struct gem_softc *sc); static int gem_ringsize(int sz); int gem_meminit __P((struct gem_softc *)); void gem_mifinit __P((struct gem_softc *)); void gem_reset __P((struct gem_softc *)); int gem_reset_rx(struct gem_softc *sc); int gem_reset_tx(struct gem_softc *sc); int gem_disable_rx(struct gem_softc *sc); int gem_disable_tx(struct gem_softc *sc); void gem_rxdrain(struct gem_softc *sc); int gem_add_rxbuf(struct gem_softc *sc, int idx); void gem_setladrf __P((struct gem_softc *)); /* MII methods & callbacks */ static int gem_mii_readreg __P((struct device *, int, int)); static void gem_mii_writereg __P((struct device *, int, int, int)); static void gem_mii_statchg __P((struct device *)); int gem_mediachange __P((struct ifnet *)); void gem_mediastatus __P((struct ifnet *, struct ifmediareq *)); struct mbuf *gem_get __P((struct gem_softc *, int, int)); int gem_put __P((struct gem_softc *, int, struct mbuf *)); void gem_read __P((struct gem_softc *, int, int)); int gem_eint __P((struct gem_softc *, u_int)); int gem_rint __P((struct gem_softc *)); int gem_tint __P((struct gem_softc *)); void gem_power __P((int, void *)); static int ether_cmp __P((u_char *, u_char *)); /* Default buffer copy routines */ void gem_copytobuf_contig __P((struct gem_softc *, void *, int, int)); void gem_copyfrombuf_contig __P((struct gem_softc *, void *, int, int)); void gem_zerobuf_contig __P((struct gem_softc *, int, int)); #ifdef GEM_DEBUG #define DPRINTF(sc, x) if ((sc)->sc_arpcom.ac_if.if_flags & IFF_DEBUG) \ printf x #else #define DPRINTF(sc, x) /* nothing */ #endif /* * gem_config: * * Attach a Gem interface to the system. */ void gem_config(sc) struct gem_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct mii_data *mii = &sc->sc_mii; struct mii_softc *child; int i, error; bcopy(sc->sc_enaddr, sc->sc_arpcom.ac_enaddr, ETHER_ADDR_LEN); /* Make sure the chip is stopped. */ ifp->if_softc = sc; gem_reset(sc); /* * Allocate the control data structures, and create and load the * DMA map for it. */ if ((error = bus_dmamem_alloc(sc->sc_dmatag, sizeof(struct gem_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 1, &sc->sc_cdnseg, 0)) != 0) { printf("%s: unable to allocate control data, error = %d\n", sc->sc_dev.dv_xname, error); goto fail_0; } /* XXX should map this in with correct endianness */ if ((error = bus_dmamem_map(sc->sc_dmatag, &sc->sc_cdseg, sc->sc_cdnseg, sizeof(struct gem_control_data), (caddr_t *)&sc->sc_control_data, BUS_DMA_COHERENT)) != 0) { printf("%s: unable to map control data, error = %d\n", sc->sc_dev.dv_xname, error); goto fail_1; } if ((error = bus_dmamap_create(sc->sc_dmatag, sizeof(struct gem_control_data), 1, sizeof(struct gem_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { printf("%s: unable to create control data DMA map, " "error = %d\n", sc->sc_dev.dv_xname, error); goto fail_2; } if ((error = bus_dmamap_load(sc->sc_dmatag, sc->sc_cddmamap, sc->sc_control_data, sizeof(struct gem_control_data), NULL, 0)) != 0) { printf("%s: unable to load control data DMA map, error = %d\n", sc->sc_dev.dv_xname, error); goto fail_3; } /* * Initialize the transmit job descriptors. */ SIMPLEQ_INIT(&sc->sc_txfreeq); SIMPLEQ_INIT(&sc->sc_txdirtyq); /* * Create the transmit buffer DMA maps. */ for (i = 0; i < GEM_TXQUEUELEN; i++) { struct gem_txsoft *txs; txs = &sc->sc_txsoft[i]; txs->txs_mbuf = NULL; if ((error = bus_dmamap_create(sc->sc_dmatag, MCLBYTES, GEM_NTXSEGS, MCLBYTES, 0, 0, &txs->txs_dmamap)) != 0) { printf("%s: unable to create tx DMA map %d, " "error = %d\n", sc->sc_dev.dv_xname, i, error); goto fail_4; } SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); } /* * Create the receive buffer DMA maps. */ for (i = 0; i < GEM_NRXDESC; i++) { if ((error = bus_dmamap_create(sc->sc_dmatag, MCLBYTES, 1, MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { printf("%s: unable to create rx DMA map %d, " "error = %d\n", sc->sc_dev.dv_xname, i, error); goto fail_5; } sc->sc_rxsoft[i].rxs_mbuf = NULL; } /* * From this point forward, the attachment cannot fail. A failure * before this point releases all resources that may have been * allocated. */ sc->sc_flags |= GEMF_ATTACHED; /* Announce ourselves. */ printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname, ether_sprintf(sc->sc_enaddr)); /* Initialize ifnet structure. */ strcpy(ifp->if_xname, sc->sc_dev.dv_xname); ifp->if_softc = sc; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; ifp->if_start = gem_start; ifp->if_ioctl = gem_ioctl; ifp->if_watchdog = gem_watchdog; IFQ_SET_READY(&ifp->if_snd); /* Initialize ifmedia structures and MII info */ mii->mii_ifp = ifp; mii->mii_readreg = gem_mii_readreg; mii->mii_writereg = gem_mii_writereg; mii->mii_statchg = gem_mii_statchg; ifmedia_init(&mii->mii_media, 0, gem_mediachange, gem_mediastatus); gem_mifinit(sc); mii_attach(&sc->sc_dev, mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0); child = LIST_FIRST(&mii->mii_phys); if (child == NULL) { /* No PHY attached */ ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); } else { /* * Walk along the list of attached MII devices and * establish an `MII instance' to `phy number' * mapping. We'll use this mapping in media change * requests to determine which phy to use to program * the MIF configuration register. */ for (; child != NULL; child = LIST_NEXT(child, mii_list)) { /* * Note: we support just two PHYs: the built-in * internal device and an external on the MII * connector. */ if (child->mii_phy > 1 || child->mii_inst > 1) { printf("%s: cannot accomodate MII device %s" " at phy %d, instance %d\n", sc->sc_dev.dv_xname, child->mii_dev.dv_xname, child->mii_phy, child->mii_inst); continue; } sc->sc_phys[child->mii_inst] = child->mii_phy; } /* * Now select and activate the PHY we will use. * * The order of preference is External (MDI1), * Internal (MDI0), Serial Link (no MII). */ if (sc->sc_phys[1]) { #ifdef DEBUG printf("using external phy\n"); #endif sc->sc_mif_config |= GEM_MIF_CONFIG_PHY_SEL; } else { #ifdef DEBUG printf("using internal phy\n"); #endif sc->sc_mif_config &= ~GEM_MIF_CONFIG_PHY_SEL; } bus_space_write_4(sc->sc_bustag, sc->sc_h, GEM_MIF_CONFIG, sc->sc_mif_config); /* * XXX - we can really do the following ONLY if the * phy indeed has the auto negotiation capability!! */ ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_AUTO); } /* Attach the interface. */ if_attach(ifp); ether_ifattach(ifp); sc->sc_sh = shutdownhook_establish(gem_shutdown, sc); if (sc->sc_sh == NULL) panic("gem_config: can't establish shutdownhook"); #if notyet /* * Add a suspend hook to make sure we come back up after a * resume. */ sc->sc_powerhook = powerhook_establish(gem_power, sc); if (sc->sc_powerhook == NULL) printf("%s: WARNING: unable to establish power hook\n", sc->sc_dev.dv_xname); #endif timeout_set(&sc->sc_tick_ch, gem_tick, sc); return; /* * Free any resources we've allocated during the failed attach * attempt. Do this in reverse order and fall through. */ fail_5: for (i = 0; i < GEM_NRXDESC; i++) { if (sc->sc_rxsoft[i].rxs_dmamap != NULL) bus_dmamap_destroy(sc->sc_dmatag, sc->sc_rxsoft[i].rxs_dmamap); } fail_4: for (i = 0; i < GEM_TXQUEUELEN; i++) { if (sc->sc_txsoft[i].txs_dmamap != NULL) bus_dmamap_destroy(sc->sc_dmatag, sc->sc_txsoft[i].txs_dmamap); } bus_dmamap_unload(sc->sc_dmatag, sc->sc_cddmamap); fail_3: bus_dmamap_destroy(sc->sc_dmatag, sc->sc_cddmamap); fail_2: bus_dmamem_unmap(sc->sc_dmatag, (caddr_t)sc->sc_control_data, sizeof(struct gem_control_data)); fail_1: bus_dmamem_free(sc->sc_dmatag, &sc->sc_cdseg, sc->sc_cdnseg); fail_0: return; } void gem_tick(arg) void *arg; { struct gem_softc *sc = arg; int s; s = splnet(); mii_tick(&sc->sc_mii); splx(s); timeout_add(&sc->sc_tick_ch, hz); } void gem_reset(sc) struct gem_softc *sc; { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int i; int s; s = splnet(); DPRINTF(sc, ("%s: gem_reset\n", sc->sc_dev.dv_xname)); gem_reset_rx(sc); gem_reset_tx(sc); /* Do a full reset */ bus_space_write_4(t, h, GEM_RESET, GEM_RESET_RX|GEM_RESET_TX); for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_RESET) & (GEM_RESET_RX|GEM_RESET_TX)) == 0) break; if ((bus_space_read_4(t, h, GEM_RESET) & (GEM_RESET_RX|GEM_RESET_TX)) != 0) { printf("%s: cannot reset device\n", sc->sc_dev.dv_xname); } splx(s); } /* * gem_rxdrain: * * Drain the receive queue. */ void gem_rxdrain(struct gem_softc *sc) { struct gem_rxsoft *rxs; int i; for (i = 0; i < GEM_NRXDESC; i++) { rxs = &sc->sc_rxsoft[i]; if (rxs->rxs_mbuf != NULL) { bus_dmamap_unload(sc->sc_dmatag, rxs->rxs_dmamap); m_freem(rxs->rxs_mbuf); rxs->rxs_mbuf = NULL; } } } /* * Reset the whole thing. */ void gem_stop(struct ifnet *ifp, int disable) { struct gem_softc *sc = (struct gem_softc *)ifp->if_softc; struct gem_txsoft *txs; if (gem_opdebug) printf("in stop %d\n", disable); DPRINTF(sc, ("%s: gem_stop\n", sc->sc_dev.dv_xname)); timeout_del(&sc->sc_tick_ch); mii_down(&sc->sc_mii); /* XXX - Should we reset these instead? */ gem_disable_rx(sc); gem_disable_rx(sc); /* * Release any queued transmit buffers. */ while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs, txs_q); if (txs->txs_mbuf != NULL) { bus_dmamap_unload(sc->sc_dmatag, txs->txs_dmamap); m_freem(txs->txs_mbuf); txs->txs_mbuf = NULL; } SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); } if (disable) { gem_rxdrain(sc); } /* * Mark the interface down and cancel the watchdog timer. */ ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); ifp->if_timer = 0; } /* * Reset the receiver */ int gem_reset_rx(struct gem_softc *sc) { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int i; /* * Resetting while DMA is in progress can cause a bus hang, so we * disable DMA first. */ gem_disable_rx(sc); bus_space_write_4(t, h, GEM_RX_CONFIG, 0); /* Wait till it finishes */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_RX_CONFIG) & 1) == 0) break; if ((bus_space_read_4(t, h, GEM_RX_CONFIG) & 1) != 0) printf("%s: cannot disable read dma\n", sc->sc_dev.dv_xname); /* Wait 5ms extra. */ delay(5000); /* Finally, reset the ERX */ bus_space_write_4(t, h, GEM_RESET, GEM_RESET_RX); /* Wait till it finishes */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_RESET) & GEM_RESET_RX) == 0) break; if ((bus_space_read_4(t, h, GEM_RESET) & GEM_RESET_RX) != 0) { printf("%s: cannot reset receiver\n", sc->sc_dev.dv_xname); return (1); } return (0); } /* * Reset the transmitter */ int gem_reset_tx(struct gem_softc *sc) { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int i; /* * Resetting while DMA is in progress can cause a bus hang, so we * disable DMA first. */ gem_disable_tx(sc); bus_space_write_4(t, h, GEM_TX_CONFIG, 0); /* Wait till it finishes */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_TX_CONFIG) & 1) == 0) break; if ((bus_space_read_4(t, h, GEM_TX_CONFIG) & 1) != 0) printf("%s: cannot disable read dma\n", sc->sc_dev.dv_xname); /* Wait 5ms extra. */ delay(5000); /* Finally, reset the ETX */ bus_space_write_4(t, h, GEM_RESET, GEM_RESET_TX); /* Wait till it finishes */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_RESET) & GEM_RESET_TX) == 0) break; if ((bus_space_read_4(t, h, GEM_RESET) & GEM_RESET_TX) != 0) { printf("%s: cannot reset receiver\n", sc->sc_dev.dv_xname); return (1); } return (0); } /* * disable receiver. */ int gem_disable_rx(struct gem_softc *sc) { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int i; u_int32_t cfg; /* Flip the enable bit */ cfg = bus_space_read_4(t, h, GEM_MAC_RX_CONFIG); cfg &= ~GEM_MAC_RX_ENABLE; bus_space_write_4(t, h, GEM_MAC_RX_CONFIG, cfg); /* Wait for it to finish */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_MAC_RX_CONFIG) & GEM_MAC_RX_ENABLE) == 0) return (0); return (1); } /* * disable transmitter. */ int gem_disable_tx(struct gem_softc *sc) { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int i; u_int32_t cfg; /* Flip the enable bit */ cfg = bus_space_read_4(t, h, GEM_MAC_TX_CONFIG); cfg &= ~GEM_MAC_TX_ENABLE; bus_space_write_4(t, h, GEM_MAC_TX_CONFIG, cfg); /* Wait for it to finish */ for (i=TRIES; i--; delay(100)) if ((bus_space_read_4(t, h, GEM_MAC_TX_CONFIG) & GEM_MAC_TX_ENABLE) == 0) return (0); return (1); } /* * Initialize interface. */ int gem_meminit(struct gem_softc *sc) { struct gem_rxsoft *rxs; int i, error; /* * Initialize the transmit descriptor ring. */ memset((void *)sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); for (i = 0; i < GEM_NTXDESC; i++) { sc->sc_txdescs[i].gd_flags = 0; sc->sc_txdescs[i].gd_addr = 0; } GEM_CDTXSYNC(sc, 0, GEM_NTXDESC, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); sc->sc_txfree = GEM_NTXDESC; sc->sc_txnext = 0; /* * Initialize the receive descriptor and receive job * descriptor rings. */ for (i = 0; i < GEM_NRXDESC; i++) { rxs = &sc->sc_rxsoft[i]; if (rxs->rxs_mbuf == NULL) { if ((error = gem_add_rxbuf(sc, i)) != 0) { printf("%s: unable to allocate or map rx " "buffer %d, error = %d\n", sc->sc_dev.dv_xname, i, error); /* * XXX Should attempt to run with fewer receive * XXX buffers instead of just failing. */ gem_rxdrain(sc); return (1); } } else GEM_INIT_RXDESC(sc, i); } sc->sc_rxptr = 0; return (0); } static int gem_ringsize(int sz) { int v; switch (sz) { case 32: v = GEM_RING_SZ_32; break; case 64: v = GEM_RING_SZ_64; break; case 128: v = GEM_RING_SZ_128; break; case 256: v = GEM_RING_SZ_256; break; case 512: v = GEM_RING_SZ_512; break; case 1024: v = GEM_RING_SZ_1024; break; case 2048: v = GEM_RING_SZ_2048; break; case 4096: v = GEM_RING_SZ_4096; break; case 8192: v = GEM_RING_SZ_8192; break; default: printf("gem: invalid Receive Descriptor ring size\n"); break; } return (v); } /* * Initialization of interface; set up initialization block * and transmit/receive descriptor rings. */ int gem_init(struct ifnet *ifp) { struct gem_softc *sc = (struct gem_softc *)ifp->if_softc; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; int s; u_int32_t v; s = splnet(); DPRINTF(sc, ("%s: gem_init: calling stop\n", sc->sc_dev.dv_xname)); /* * Initialization sequence. The numbered steps below correspond * to the sequence outlined in section 6.3.5.1 in the Ethernet * Channel Engine manual (part of the PCIO manual). * See also the STP2002-STQ document from Sun Microsystems. */ /* step 1 & 2. Reset the Ethernet Channel */ gem_stop(ifp, 0); if (gem_opdebug) printf("in init\n"); gem_reset(sc); DPRINTF(sc, ("%s: gem_init: restarting\n", sc->sc_dev.dv_xname)); /* Re-initialize the MIF */ gem_mifinit(sc); /* Call MI reset function if any */ if (sc->sc_hwreset) (*sc->sc_hwreset)(sc); /* step 3. Setup data structures in host memory */ gem_meminit(sc); /* step 4. TX MAC registers & counters */ gem_init_regs(sc); v = (GEM_MTU) | (0x2000 << 16) /* Burst size */; bus_space_write_4(t, h, GEM_MAC_MAC_MAX_FRAME, v); /* step 5. RX MAC registers & counters */ gem_setladrf(sc); /* step 6 & 7. Program Descriptor Ring Base Addresses */ bus_space_write_8(t, h, GEM_TX_RING_PTR, GEM_CDTXADDR(sc, 0)); /* Yeeech. The following has endianness issues. */ bus_space_write_4(t, h, GEM_RX_RING_PTR_HI, (((uint64_t)GEM_CDRXADDR(sc, 0))>>32)); bus_space_write_4(t, h, GEM_RX_RING_PTR_LO, GEM_CDRXADDR(sc, 0)); /* step 8. Global Configuration & Interrupt Mask */ bus_space_write_4(t, h, GEM_INTMASK, ~(GEM_INTR_TX_INTME| GEM_INTR_TX_EMPTY| GEM_INTR_RX_DONE|GEM_INTR_RX_NOBUF| GEM_INTR_RX_TAG_ERR|GEM_INTR_PCS| GEM_INTR_MAC_CONTROL|GEM_INTR_MIF| GEM_INTR_BERR)); bus_space_write_4(t, h, GEM_MAC_RX_MASK, 0); /* XXXX */ bus_space_write_4(t, h, GEM_MAC_TX_MASK, 0xffff); /* XXXX */ bus_space_write_4(t, h, GEM_MAC_CONTROL_MASK, 0); /* XXXX */ #if 0 if (!sc->sc_pci) { /* Config SBus */ switch (sc->sc_burst) { default: v = 0; break; case 16: v = GEM_SEB_CFG_BURST16; break; case 32: v = GEM_SEB_CFG_BURST32; break; case 64: v = GEM_SEB_CFG_BURST64; break; } bus_space_write_4(t, seb, GEM_SEBI_CFG, v|GE_SIOCFG_PARITY|GE_SIOCFG_BMODE64); } #endif /* step 9. ETX Configuration: use mostly default values */ /* Enable DMA */ v = gem_ringsize(GEM_NTXDESC /*XXX*/); bus_space_write_4(t, h, GEM_TX_CONFIG, v|GEM_TX_CONFIG_TXDMA_EN| ((0x400<<10)&GEM_TX_CONFIG_TXFIFO_TH)); bus_space_write_4(t, h, GEM_TX_KICK, sc->sc_txnext); /* step 10. ERX Configuration */ /* Encode Receive Descriptor ring size: four possible values */ v = gem_ringsize(GEM_NRXDESC /*XXX*/); /* Enable DMA */ bus_space_write_4(t, h, GEM_RX_CONFIG, v|(GEM_THRSH_1024<sc_dev); /* XXXX Serial link needs a whole different setup. */ /* step 12. RX_MAC Configuration Register */ v = bus_space_read_4(t, h, GEM_MAC_RX_CONFIG); v |= GEM_MAC_RX_ENABLE; bus_space_write_4(t, h, GEM_MAC_RX_CONFIG, v); /* step 14. Issue Transmit Pending command */ /* Call MI initialization function if any */ if (sc->sc_hwinit) (*sc->sc_hwinit)(sc); /* step 15. Give the reciever a swift kick */ bus_space_write_4(t, h, GEM_RX_KICK, GEM_NRXDESC-4); /* Start the one second timer. */ timeout_add(&sc->sc_tick_ch, hz); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; ifp->if_timer = 0; splx(s); return (0); } /* * Compare two Ether/802 addresses for equality, inlined and unrolled for * speed. */ static __inline__ int ether_cmp(a, b) u_char *a, *b; { if (a[5] != b[5] || a[4] != b[4] || a[3] != b[3] || a[2] != b[2] || a[1] != b[1] || a[0] != b[0]) return (0); return (1); } void gem_init_regs(struct gem_softc *sc) { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; u_int32_t v; /* These regs are not cleared on reset */ sc->sc_inited = 0; if (!sc->sc_inited) { /* Wooo. Magic values. */ bus_space_write_4(t, h, GEM_MAC_IPG0, 0); bus_space_write_4(t, h, GEM_MAC_IPG1, 8); bus_space_write_4(t, h, GEM_MAC_IPG2, 4); bus_space_write_4(t, h, GEM_MAC_MAC_MIN_FRAME, ETHER_MIN_LEN); /* Max frame and max burst size */ v = (GEM_MTU) | (0x2000 << 16) /* Burst size */; bus_space_write_4(t, h, GEM_MAC_MAC_MAX_FRAME, v); bus_space_write_4(t, h, GEM_MAC_PREAMBLE_LEN, 0x7); bus_space_write_4(t, h, GEM_MAC_JAM_SIZE, 0x4); bus_space_write_4(t, h, GEM_MAC_ATTEMPT_LIMIT, 0x10); /* Dunno.... */ bus_space_write_4(t, h, GEM_MAC_CONTROL_TYPE, 0x8088); bus_space_write_4(t, h, GEM_MAC_RANDOM_SEED, ((sc->sc_enaddr[5]<<8)|sc->sc_enaddr[4])&0x3ff); /* Secondary MAC addr set to 0:0:0:0:0:0 */ bus_space_write_4(t, h, GEM_MAC_ADDR3, 0); bus_space_write_4(t, h, GEM_MAC_ADDR4, 0); bus_space_write_4(t, h, GEM_MAC_ADDR5, 0); /* MAC control addr set to 0:1:c2:0:1:80 */ bus_space_write_4(t, h, GEM_MAC_ADDR6, 0x0001); bus_space_write_4(t, h, GEM_MAC_ADDR7, 0xc200); bus_space_write_4(t, h, GEM_MAC_ADDR8, 0x0180); /* MAC filter addr set to 0:0:0:0:0:0 */ bus_space_write_4(t, h, GEM_MAC_ADDR_FILTER0, 0); bus_space_write_4(t, h, GEM_MAC_ADDR_FILTER1, 0); bus_space_write_4(t, h, GEM_MAC_ADDR_FILTER2, 0); bus_space_write_4(t, h, GEM_MAC_ADR_FLT_MASK1_2, 0); bus_space_write_4(t, h, GEM_MAC_ADR_FLT_MASK0, 0); sc->sc_inited = 1; } /* Counters need to be zeroed */ bus_space_write_4(t, h, GEM_MAC_NORM_COLL_CNT, 0); bus_space_write_4(t, h, GEM_MAC_FIRST_COLL_CNT, 0); bus_space_write_4(t, h, GEM_MAC_EXCESS_COLL_CNT, 0); bus_space_write_4(t, h, GEM_MAC_LATE_COLL_CNT, 0); bus_space_write_4(t, h, GEM_MAC_DEFER_TMR_CNT, 0); bus_space_write_4(t, h, GEM_MAC_PEAK_ATTEMPTS, 0); bus_space_write_4(t, h, GEM_MAC_RX_FRAME_COUNT, 0); bus_space_write_4(t, h, GEM_MAC_RX_LEN_ERR_CNT, 0); bus_space_write_4(t, h, GEM_MAC_RX_ALIGN_ERR, 0); bus_space_write_4(t, h, GEM_MAC_RX_CRC_ERR_CNT, 0); bus_space_write_4(t, h, GEM_MAC_RX_CODE_VIOL, 0); /* Un-pause stuff */ #if 0 bus_space_write_4(t, h, GEM_MAC_SEND_PAUSE_CMD, 0x1BF0); #else bus_space_write_4(t, h, GEM_MAC_SEND_PAUSE_CMD, 0); #endif /* * Set the station address. */ bus_space_write_4(t, h, GEM_MAC_ADDR0, (sc->sc_enaddr[4]<<8) | sc->sc_enaddr[5]); bus_space_write_4(t, h, GEM_MAC_ADDR1, (sc->sc_enaddr[2]<<8) | sc->sc_enaddr[3]); bus_space_write_4(t, h, GEM_MAC_ADDR2, (sc->sc_enaddr[0]<<8) | sc->sc_enaddr[1]); } void gem_start(ifp) struct ifnet *ifp; { struct gem_softc *sc = (struct gem_softc *)ifp->if_softc; struct mbuf *m0, *m; struct gem_txsoft *txs, *last_txs; bus_dmamap_t dmamap; int error, firsttx, nexttx, lasttx, ofree, seg; if (gem_opdebug) printf("in start free %x next %x kick %x\n", sc->sc_txfree, sc->sc_txnext, bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_KICK)); if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) return; /* * Remember the previous number of free descriptors and * the first descriptor we'll use. */ ofree = sc->sc_txfree; firsttx = sc->sc_txnext; DPRINTF(sc, ("%s: gem_start: txfree %d, txnext %d\n", sc->sc_dev.dv_xname, ofree, firsttx)); /* * Loop through the send queue, setting up transmit descriptors * until we drain the queue, or use up all available transmit * descriptors. */ while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && sc->sc_txfree != 0) { /* * Grab a packet off the queue. */ IFQ_POLL(&ifp->if_snd, m0); if (m0 == NULL) break; m = NULL; dmamap = txs->txs_dmamap; /* * Load the DMA map. If this fails, the packet either * didn't fit in the alloted number of segments, or we were * short on resources. In this case, we'll copy and try * again. */ if (bus_dmamap_load_mbuf(sc->sc_dmatag, dmamap, m0, BUS_DMA_WRITE|BUS_DMA_NOWAIT) != 0) { MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) { printf("%s: unable to allocate Tx mbuf\n", sc->sc_dev.dv_xname); break; } if (m0->m_pkthdr.len > MHLEN) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { printf("%s: unable to allocate Tx " "cluster\n", sc->sc_dev.dv_xname); m_freem(m); break; } } m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; error = bus_dmamap_load_mbuf(sc->sc_dmatag, dmamap, m, BUS_DMA_WRITE|BUS_DMA_NOWAIT); if (error) { printf("%s: unable to load Tx buffer, " "error = %d\n", sc->sc_dev.dv_xname, error); break; } } /* * Ensure we have enough descriptors free to describe * the packet. */ if (dmamap->dm_nsegs > sc->sc_txfree) { /* * Not enough free descriptors to transmit this * packet. We haven't committed to anything yet, * so just unload the DMA map, put the packet * back on the queue, and punt. Notify the upper * layer that there are no more slots left. * * XXX We could allocate an mbuf and copy, but * XXX it is worth it? */ ifp->if_flags |= IFF_OACTIVE; bus_dmamap_unload(sc->sc_dmatag, dmamap); if (m != NULL) m_freem(m); break; } IFQ_DEQUEUE(&ifp->if_snd, m0); if (m != NULL) { m_freem(m0); m0 = m; } /* * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. */ /* Sync the DMA map. */ bus_dmamap_sync(sc->sc_dmatag, dmamap, 0, dmamap->dm_mapsize, BUS_DMASYNC_PREWRITE); /* * Initialize the transmit descriptors. */ for (nexttx = sc->sc_txnext, seg = 0; seg < dmamap->dm_nsegs; seg++, nexttx = GEM_NEXTTX(nexttx)) { uint64_t flags; /* * If this is the first descriptor we're * enqueueing, set the start of packet flag, * and the checksum stuff if we want the hardware * to do it. */ sc->sc_txdescs[nexttx].gd_addr = htole64(dmamap->dm_segs[seg].ds_addr); flags = dmamap->dm_segs[seg].ds_len & GEM_TD_BUFSIZE; if (nexttx == firsttx) { flags |= GEM_TD_START_OF_PACKET; } if (seg == dmamap->dm_nsegs - 1) { flags |= GEM_TD_END_OF_PACKET; } sc->sc_txdescs[nexttx].gd_flags = htole64(flags); lasttx = nexttx; } #ifdef GEM_DEBUG if (ifp->if_flags & IFF_DEBUG) { printf(" gem_start %p transmit chain:\n", txs); for (seg = sc->sc_txnext;; seg = GEM_NEXTTX(seg)) { printf("descriptor %d:\t", seg); printf("gd_flags: 0x%016llx\t", (long long) letoh64(sc->sc_txdescs[seg].gd_flags)); printf("gd_addr: 0x%016llx\n", (long long) letoh64(sc->sc_txdescs[seg].gd_addr)); if (seg == lasttx) break; } } #endif /* Sync the descriptors we're using. */ GEM_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); /* * Store a pointer to the packet so we can free it later, * and remember what txdirty will be once the packet is * done. */ txs->txs_mbuf = m0; txs->txs_firstdesc = sc->sc_txnext; txs->txs_lastdesc = lasttx; txs->txs_ndescs = dmamap->dm_nsegs; /* Advance the tx pointer. */ sc->sc_txfree -= dmamap->dm_nsegs; sc->sc_txnext = nexttx; SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs, txs_q); SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); last_txs = txs; #if NBPFILTER > 0 /* * Pass the packet to any BPF listeners. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m0); #endif /* NBPFILTER > 0 */ } if (txs == NULL || sc->sc_txfree == 0) { /* No more slots left; notify upper layer. */ ifp->if_flags |= IFF_OACTIVE; } if (sc->sc_txfree != ofree) { DPRINTF(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", sc->sc_dev.dv_xname, lasttx, firsttx)); #if 0 /* * Cause a transmit interrupt to happen on the * last packet we enqueued. */ sc->sc_txdescs[lasttx].gd_flags |= htole64(GEM_TD_INTERRUPT_ME); GEM_CDTXSYNC(sc, lasttx, 1, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); #endif /* * The entire packet chain is set up. * Kick the transmitter. */ DPRINTF(sc, ("%s: gem_start: kicking tx %d\n", sc->sc_dev.dv_xname, nexttx)); if (gem_opdebug) { int i; int64_t pa; i = bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_KICK); printf("GEM_TX_KICK %x GEM_TX_DATA_PTR %llx GEM_TX_RING_PTR %llx\n", i, (long long)bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_DATA_PTR), (long long)bus_space_read_8(sc->sc_bustag, sc->sc_h, GEM_TX_RING_PTR)); printf("descriptor %d: ", (i = lasttx)); printf("gd_flags: 0x%016llx\t", (long long) letoh64(sc->sc_txdescs[i].gd_flags)); pa = letoh64(sc->sc_txdescs[i].gd_addr); printf("gd_addr: 0x%016llx\n", (long long) pa); printf("GEM_TX_CONFIG %x GEM_MAC_XIF_CONFIG %x GEM_MAC_TX_CONFIG %x\n", bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_CONFIG), bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_MAC_XIF_CONFIG), bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_MAC_TX_CONFIG)); } bus_space_write_4(sc->sc_bustag, sc->sc_h, GEM_TX_KICK, sc->sc_txnext); if (gem_opdebug) printf("gem_start: txkick %x\n", bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_KICK)); /* Set a watchdog timer in case the chip flakes out. */ ifp->if_timer = 5; DPRINTF(sc, ("%s: gem_start: watchdog %d\n", sc->sc_dev.dv_xname, ifp->if_timer)); } } /* * Transmit interrupt. */ int gem_tint(sc) struct gem_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t mac = sc->sc_h; struct gem_txsoft *txs; int txlast; DPRINTF(sc, ("%s: gem_tint: sc_flags 0x%08x\n", sc->sc_dev.dv_xname, sc->sc_flags)); /* * Unload collision counters */ ifp->if_collisions += bus_space_read_4(t, mac, GEM_MAC_NORM_COLL_CNT) + bus_space_read_4(t, mac, GEM_MAC_FIRST_COLL_CNT) + bus_space_read_4(t, mac, GEM_MAC_EXCESS_COLL_CNT) + bus_space_read_4(t, mac, GEM_MAC_LATE_COLL_CNT); /* * then clear the hardware counters. */ bus_space_write_4(t, mac, GEM_MAC_NORM_COLL_CNT, 0); bus_space_write_4(t, mac, GEM_MAC_FIRST_COLL_CNT, 0); bus_space_write_4(t, mac, GEM_MAC_EXCESS_COLL_CNT, 0); bus_space_write_4(t, mac, GEM_MAC_LATE_COLL_CNT, 0); /* * Go through our Tx list and free mbufs for those * frames that have been transmitted. */ while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { GEM_CDTXSYNC(sc, txs->txs_lastdesc, txs->txs_ndescs, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); #ifdef GEM_DEBUG if (ifp->if_flags & IFF_DEBUG) { int i; printf(" txsoft %p transmit chain:\n", txs); for (i = txs->txs_firstdesc;; i = GEM_NEXTTX(i)) { printf("descriptor %d: ", i); printf("gd_flags: 0x%016llx\t", (long long) letoh64(sc->sc_txdescs[i].gd_flags)); printf("gd_addr: 0x%016llx\n", (long long) letoh64(sc->sc_txdescs[i].gd_addr)); if (i == txs->txs_lastdesc) break; } } #endif /* * In theory, we could harveast some descriptors before * the ring is empty, but that's a bit complicated. * * GEM_TX_COMPLETION points to the last descriptor * processed +1. */ txlast = bus_space_read_4(t, mac, GEM_TX_COMPLETION); DPRINTF(sc, ("gem_tint: txs->txs_lastdesc = %d, txlast = %d\n", txs->txs_lastdesc, txlast)); if (txs->txs_firstdesc <= txs->txs_lastdesc) { if ((txlast >= txs->txs_firstdesc) && (txlast <= txs->txs_lastdesc)) break; } else { /* Ick -- this command wraps */ if ((txlast >= txs->txs_firstdesc) || (txlast <= txs->txs_lastdesc)) break; } DPRINTF(sc, ("gem_tint: releasing a desc\n")); SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs, txs_q); sc->sc_txfree += txs->txs_ndescs; if (txs->txs_mbuf == NULL) { #ifdef DIAGNOSTIC panic("gem_txintr: null mbuf"); #endif } bus_dmamap_sync(sc->sc_dmatag, txs->txs_dmamap, 0, txs->txs_dmamap->dm_mapsize, BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(sc->sc_dmatag, txs->txs_dmamap); m_freem(txs->txs_mbuf); txs->txs_mbuf = NULL; SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); ifp->if_opackets++; } DPRINTF(sc, ("gem_tint: GEM_TX_STATE_MACHINE %x " "GEM_TX_DATA_PTR %llx " "GEM_TX_COMPLETION %x\n", bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_STATE_MACHINE), (long long)bus_space_read_8(sc->sc_bustag, sc->sc_h, GEM_TX_DATA_PTR), bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_TX_COMPLETION))); gem_start(ifp); if (SIMPLEQ_FIRST(&sc->sc_txdirtyq) == NULL) ifp->if_timer = 0; DPRINTF(sc, ("%s: gem_tint: watchdog %d\n", sc->sc_dev.dv_xname, ifp->if_timer)); return (1); } /* * Receive interrupt. */ int gem_rint(sc) struct gem_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; struct ether_header *eh; struct gem_rxsoft *rxs; struct mbuf *m; u_int64_t rxstat; int i, len; DPRINTF(sc, ("%s: gem_rint: sc_flags 0x%08x\n", sc->sc_dev.dv_xname, sc->sc_flags)); /* * XXXX Read the lastrx only once at the top for speed. */ DPRINTF(sc, ("gem_rint: sc->rxptr %d, complete %d\n", sc->sc_rxptr, bus_space_read_4(t, h, GEM_RX_COMPLETION))); for (i = sc->sc_rxptr; i != bus_space_read_4(t, h, GEM_RX_COMPLETION); i = GEM_NEXTRX(i)) { rxs = &sc->sc_rxsoft[i]; GEM_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); rxstat = letoh64(sc->sc_rxdescs[i].gd_flags); if (rxstat & GEM_RD_OWN) { printf("gem_rint: completed descriptor " "still owned %d\n", i); /* * We have processed all of the receive buffers. */ break; } if (rxstat & GEM_RD_BAD_CRC) { printf("%s: receive error: CRC error\n", sc->sc_dev.dv_xname); GEM_INIT_RXDESC(sc, i); continue; } bus_dmamap_sync(sc->sc_dmatag, rxs->rxs_dmamap, 0, rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); #ifdef GEM_DEBUG if (ifp->if_flags & IFF_DEBUG) { printf(" rxsoft %p descriptor %d: ", rxs, i); printf("gd_flags: 0x%016llx\t", (long long) letoh64(sc->sc_rxdescs[i].gd_flags)); printf("gd_addr: 0x%016llx\n", (long long) letoh64(sc->sc_rxdescs[i].gd_addr)); } #endif /* * No errors; receive the packet. Note the Gem * includes the CRC with every packet. */ len = GEM_RD_BUFLEN(rxstat); /* * We align the mbuf data in gem_add_rxbuf() so * we can use __NO_STRICT_ALIGNMENT here */ #define __NO_STRICT_ALIGNMENT #ifdef __NO_STRICT_ALIGNMENT /* * Allocate a new mbuf cluster. If that fails, we are * out of memory, and must drop the packet and recycle * the buffer that's already attached to this descriptor. */ m = rxs->rxs_mbuf; if (gem_add_rxbuf(sc, i) != 0) { ifp->if_ierrors++; GEM_INIT_RXDESC(sc, i); bus_dmamap_sync(sc->sc_dmatag, rxs->rxs_dmamap, 0, rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); continue; } m->m_data += 2; /* We're already off by two */ #else /* * The Gem's receive buffers must be 4-byte aligned. * But this means that the data after the Ethernet header * is misaligned. We must allocate a new buffer and * copy the data, shifted forward 2 bytes. */ MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) { dropit: ifp->if_ierrors++; GEM_INIT_RXDESC(sc, i); bus_dmamap_sync(sc->sc_dmatag, rxs->rxs_dmamap, 0, rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); continue; } if (len > (MHLEN - 2)) { MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); goto dropit; } } m->m_data += 2; /* * Note that we use clusters for incoming frames, so the * buffer is virtually contiguous. */ memcpy(mtod(m, caddr_t), mtod(rxs->rxs_mbuf, caddr_t), len); /* Allow the receive descriptor to continue using its mbuf. */ GEM_INIT_RXDESC(sc, i); bus_dmamap_sync(sc->sc_dmatag, rxs->rxs_dmamap, 0, rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); #endif /* __NO_STRICT_ALIGNMENT */ ifp->if_ipackets++; eh = mtod(m, struct ether_header *); m->m_pkthdr.rcvif = ifp; m->m_pkthdr.len = m->m_len = len; #if NBPFILTER > 0 /* * Pass this up to any BPF listeners, but only * pass it up the stack if its for us. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif /* NPBFILTER > 0 */ #if 0 /* * We sometimes have to run the 21140 in Hash-Only * mode. If we're in that mode, and not in promiscuous * mode, and we have a unicast packet that isn't for * us, then drop it. */ if (sc->sc_filtmode == TDCTL_Tx_FT_HASHONLY && (ifp->if_flags & IFF_PROMISC) == 0 && ETHER_IS_MULTICAST(eh->ether_dhost) == 0 && memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, ETHER_ADDR_LEN) != 0) { m_freem(m); continue; } #endif /* Pass it on. */ ether_input_mbuf(ifp, m); } /* Update the receive pointer. */ sc->sc_rxptr = i; bus_space_write_4(t, h, GEM_RX_KICK, i); DPRINTF(sc, ("gem_rint: done sc->rxptr %d, complete %d\n", sc->sc_rxptr, bus_space_read_4(t, h, GEM_RX_COMPLETION))); return (1); } /* * gem_add_rxbuf: * * Add a receive buffer to the indicated descriptor. */ int gem_add_rxbuf(struct gem_softc *sc, int idx) { struct gem_rxsoft *rxs = &sc->sc_rxsoft[idx]; struct mbuf *m; int error; MGETHDR(m, M_DONTWAIT, MT_DATA); if (m == NULL) return (ENOBUFS); MCLGET(m, M_DONTWAIT); if ((m->m_flags & M_EXT) == 0) { m_freem(m); return (ENOBUFS); } #ifdef GEM_DEBUG /* bzero the packet to check dma */ memset(m->m_ext.ext_buf, 0, m->m_ext.ext_size); #endif if (rxs->rxs_mbuf != NULL) bus_dmamap_unload(sc->sc_dmatag, rxs->rxs_dmamap); rxs->rxs_mbuf = m; error = bus_dmamap_load(sc->sc_dmatag, rxs->rxs_dmamap, m->m_ext.ext_buf, m->m_ext.ext_size, NULL, BUS_DMA_READ|BUS_DMA_NOWAIT); if (error) { printf("%s: can't load rx DMA map %d, error = %d\n", sc->sc_dev.dv_xname, idx, error); panic("gem_add_rxbuf"); /* XXX */ } bus_dmamap_sync(sc->sc_dmatag, rxs->rxs_dmamap, 0, rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); GEM_INIT_RXDESC(sc, idx); return (0); } int gem_eint(sc, status) struct gem_softc *sc; u_int status; { if ((status & GEM_INTR_MIF) != 0) { printf("%s: XXXlink status changed\n", sc->sc_dev.dv_xname); return (1); } printf("%s: status=%b\n", sc->sc_dev.dv_xname, status, GEM_INTR_BITS); return (1); } int gem_intr(v) void *v; { struct gem_softc *sc = (struct gem_softc *)v; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t seb = sc->sc_h; u_int32_t status; int r = 0; status = bus_space_read_4(t, seb, GEM_STATUS); DPRINTF(sc, ("%s: gem_intr: cplt %xstatus %b\n", sc->sc_dev.dv_xname, (status>>19), status, GEM_INTR_BITS)); if (gem_opdebug) printf("%s: gem_intr: cplt %x status %b\n", sc->sc_dev.dv_xname, (status>>19), status, GEM_INTR_BITS); if (gem_opdebug && (status & GEM_INTR_TX_DONE)) { int i; int64_t pa; i = bus_space_read_4(t, seb, GEM_TX_KICK); printf("GEM_TX_KICK %x GEM_TX_DATA_PTR %llx GEM_TX_RING_PTR %llx\n", i, (long long)bus_space_read_4(t, seb, GEM_TX_DATA_PTR), (long long)bus_space_read_8(t, seb, GEM_TX_RING_PTR)); printf("descriptor %d: ", --i); printf("gd_flags: 0x%016llx\t", (long long) letoh64(sc->sc_txdescs[i].gd_flags)); pa = letoh64(sc->sc_txdescs[i].gd_addr); printf("gd_addr: 0x%016llx\n", (long long) pa); printf("GEM_TX_CONFIG %x GEM_MAC_XIF_CONFIG %x GEM_MAC_TX_CONFIG %x " "GEM_MAC_TX_STATUS %x\n", bus_space_read_4(t, seb, GEM_TX_CONFIG), bus_space_read_4(t, seb, GEM_MAC_XIF_CONFIG), bus_space_read_4(t, seb, GEM_MAC_TX_CONFIG), bus_space_read_4(t, seb, GEM_MAC_TX_STATUS)); } if ((status & (GEM_INTR_RX_TAG_ERR | GEM_INTR_BERR)) != 0) r |= gem_eint(sc, status); if ((status & (GEM_INTR_TX_EMPTY | GEM_INTR_TX_INTME)) != 0) r |= gem_tint(sc); if ((status & (GEM_INTR_RX_DONE | GEM_INTR_RX_NOBUF)) != 0) r |= gem_rint(sc); /* We should eventually do more than just print out error stats. */ if (status & GEM_INTR_TX_MAC) { int txstat = bus_space_read_4(t, seb, GEM_MAC_TX_STATUS); if (txstat & ~GEM_MAC_TX_XMIT_DONE) printf("MAC tx fault, status %x\n", txstat); } if (status & GEM_INTR_RX_MAC) { int rxstat = bus_space_read_4(t, seb, GEM_MAC_RX_STATUS); if (rxstat & ~GEM_MAC_RX_DONE) printf("MAC rx fault, status %x\n", rxstat); } return (r); } void gem_watchdog(ifp) struct ifnet *ifp; { struct gem_softc *sc = ifp->if_softc; DPRINTF(sc, ("gem_watchdog: GEM_RX_CONFIG %x GEM_MAC_RX_STATUS %x " "GEM_MAC_RX_CONFIG %x\n", bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_RX_CONFIG), bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_MAC_RX_STATUS), bus_space_read_4(sc->sc_bustag, sc->sc_h, GEM_MAC_RX_CONFIG))); log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); ++ifp->if_oerrors; /* Try to get more packets going. */ // gem_reset(sc); gem_start(ifp); } /* * Initialize the MII Management Interface */ void gem_mifinit(sc) struct gem_softc *sc; { bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t mif = sc->sc_h; /* Configure the MIF in frame mode */ sc->sc_mif_config = bus_space_read_4(t, mif, GEM_MIF_CONFIG); sc->sc_mif_config &= ~GEM_MIF_CONFIG_BB_ENA; bus_space_write_4(t, mif, GEM_MIF_CONFIG, sc->sc_mif_config); } /* * MII interface * * The GEM MII interface supports at least three different operating modes: * * Bitbang mode is implemented using data, clock and output enable registers. * * Frame mode is implemented by loading a complete frame into the frame * register and polling the valid bit for completion. * * Polling mode uses the frame register but completion is indicated by * an interrupt. * */ static int gem_mii_readreg(self, phy, reg) struct device *self; int phy, reg; { struct gem_softc *sc = (void *)self; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t mif = sc->sc_h; int n; u_int32_t v; #ifdef GEM_DEBUG1 if (sc->sc_debug) printf("gem_mii_readreg: phy %d reg %d\n", phy, reg); #endif #if 0 /* Select the desired PHY in the MIF configuration register */ v = bus_space_read_4(t, mif, GEM_MIF_CONFIG); /* Clear PHY select bit */ v &= ~GEM_MIF_CONFIG_PHY_SEL; if (phy == GEM_PHYAD_EXTERNAL) /* Set PHY select bit to get at external device */ v |= GEM_MIF_CONFIG_PHY_SEL; bus_space_write_4(t, mif, GEM_MIF_CONFIG, v); #endif /* Construct the frame command */ v = (reg << GEM_MIF_REG_SHIFT) | (phy << GEM_MIF_PHY_SHIFT) | GEM_MIF_FRAME_READ; bus_space_write_4(t, mif, GEM_MIF_FRAME, v); for (n = 0; n < 100; n++) { DELAY(1); v = bus_space_read_4(t, mif, GEM_MIF_FRAME); if (v & GEM_MIF_FRAME_TA0) return (v & GEM_MIF_FRAME_DATA); } printf("%s: mii_read timeout\n", sc->sc_dev.dv_xname); return (0); } static void gem_mii_writereg(self, phy, reg, val) struct device *self; int phy, reg, val; { struct gem_softc *sc = (void *)self; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t mif = sc->sc_h; int n; u_int32_t v; #ifdef GEM_DEBUG1 if (sc->sc_debug) printf("gem_mii_writereg: phy %d reg %d val %x\n", phy, reg, val); #endif #if 0 /* Select the desired PHY in the MIF configuration register */ v = bus_space_read_4(t, mif, GEM_MIF_CONFIG); /* Clear PHY select bit */ v &= ~GEM_MIF_CONFIG_PHY_SEL; if (phy == GEM_PHYAD_EXTERNAL) /* Set PHY select bit to get at external device */ v |= GEM_MIF_CONFIG_PHY_SEL; bus_space_write_4(t, mif, GEM_MIF_CONFIG, v); #endif /* Construct the frame command */ v = GEM_MIF_FRAME_WRITE | (phy << GEM_MIF_PHY_SHIFT) | (reg << GEM_MIF_REG_SHIFT) | (val & GEM_MIF_FRAME_DATA); bus_space_write_4(t, mif, GEM_MIF_FRAME, v); for (n = 0; n < 100; n++) { DELAY(1); v = bus_space_read_4(t, mif, GEM_MIF_FRAME); if (v & GEM_MIF_FRAME_TA0) return; } printf("%s: mii_write timeout\n", sc->sc_dev.dv_xname); } static void gem_mii_statchg(dev) struct device *dev; { struct gem_softc *sc = (void *)dev; int instance = IFM_INST(sc->sc_mii.mii_media.ifm_cur->ifm_media); int phy = sc->sc_phys[instance]; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t mac = sc->sc_h; u_int32_t v; #ifdef GEM_DEBUG if (sc->sc_debug) printf("gem_mii_statchg: status change: phy = %d\n", phy); #endif /* Set tx full duplex options */ bus_space_write_4(t, mac, GEM_MAC_TX_CONFIG, 0); delay(10000); /* reg must be cleared and delay before changing. */ v = GEM_MAC_TX_ENA_IPG0|GEM_MAC_TX_NGU|GEM_MAC_TX_NGU_LIMIT| GEM_MAC_TX_ENABLE; if ((IFM_OPTIONS(sc->sc_mii.mii_media_active) & IFM_FDX) != 0) { v |= GEM_MAC_TX_IGN_CARRIER|GEM_MAC_TX_IGN_COLLIS; } bus_space_write_4(t, mac, GEM_MAC_TX_CONFIG, v); /* XIF Configuration */ /* We should really calculate all this rather than rely on defaults */ v = bus_space_read_4(t, mac, GEM_MAC_XIF_CONFIG); v = GEM_MAC_XIF_LINK_LED; v |= GEM_MAC_XIF_TX_MII_ENA; /* If an external transceiver is connected, enable its MII drivers */ sc->sc_mif_config = bus_space_read_4(t, mac, GEM_MIF_CONFIG); if ((sc->sc_mif_config & GEM_MIF_CONFIG_MDI1) != 0) { /* External MII needs echo disable if half duplex. */ if ((IFM_OPTIONS(sc->sc_mii.mii_media_active) & IFM_FDX) != 0) /* turn on full duplex LED */ v |= GEM_MAC_XIF_FDPLX_LED; else /* half duplex -- disable echo */ v |= GEM_MAC_XIF_ECHO_DISABL; } else /* Internal MII needs buf enable */ v |= GEM_MAC_XIF_MII_BUF_ENA; bus_space_write_4(t, mac, GEM_MAC_XIF_CONFIG, v); } int gem_mediachange(ifp) struct ifnet *ifp; { struct gem_softc *sc = ifp->if_softc; if (IFM_TYPE(sc->sc_media.ifm_media) != IFM_ETHER) return (EINVAL); return (mii_mediachg(&sc->sc_mii)); } void gem_mediastatus(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct gem_softc *sc = ifp->if_softc; if ((ifp->if_flags & IFF_UP) == 0) return; mii_pollstat(&sc->sc_mii); ifmr->ifm_active = sc->sc_mii.mii_media_active; ifmr->ifm_status = sc->sc_mii.mii_media_status; } int gem_ioctldebug = 0; /* * Process an ioctl request. */ int gem_ioctl(ifp, cmd, data) struct ifnet *ifp; u_long cmd; caddr_t data; { struct gem_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: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: gem_init(ifp); 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 { memcpy(LLADDR(ifp->if_sadl), ina->x_host.c_host, sizeof(sc->sc_enaddr)); } /* Set new address. */ gem_init(ifp); break; } #endif default: gem_init(ifp); break; } break; case SIOCSIFFLAGS: if ((ifp->if_flags & IFF_UP) == 0 && (ifp->if_flags & IFF_RUNNING) != 0) { /* * If interface is marked down and it is running, then * stop it. */ gem_stop(ifp, 1); ifp->if_flags &= ~IFF_RUNNING; } else if ((ifp->if_flags & IFF_UP) != 0 && (ifp->if_flags & IFF_RUNNING) == 0) { /* * If interface is marked up and it is stopped, then * start it. */ gem_init(ifp); } else if ((ifp->if_flags & IFF_UP) != 0) { /* * Reset the interface to pick up changes in any other * flags that affect hardware registers. */ /*gem_stop(sc);*/ gem_init(ifp); } #ifdef HMEDEBUG sc->sc_debug = (ifp->if_flags & IFF_DEBUG) != 0 ? 1 : 0; #endif break; case SIOCADDMULTI: case SIOCDELMULTI: 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. */ gem_setladrf(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); } void gem_shutdown(arg) void *arg; { struct gem_softc *sc = (struct gem_softc *)arg; struct ifnet *ifp = &sc->sc_arpcom.ac_if; gem_stop(ifp, 1); } /* * Set up the logical address filter. */ void gem_setladrf(sc) struct gem_softc *sc; { struct ifnet *ifp = &sc->sc_arpcom.ac_if; struct ether_multi *enm; struct ether_multistep step; struct arpcom *ac = &sc->sc_arpcom; bus_space_tag_t t = sc->sc_bustag; bus_space_handle_t h = sc->sc_h; u_char *cp; u_int32_t crc; u_int32_t hash[16]; u_int32_t v; int len; /* Clear hash table */ memset(hash, 0, sizeof(hash)); /* Get current RX configuration */ v = bus_space_read_4(t, h, GEM_MAC_RX_CONFIG); if ((ifp->if_flags & IFF_PROMISC) != 0) { /* Turn on promiscuous mode; turn off the hash filter */ v |= GEM_MAC_RX_PROMISCUOUS; v &= ~GEM_MAC_RX_HASH_FILTER; ifp->if_flags |= IFF_ALLMULTI; goto chipit; } /* Turn off promiscuous mode; turn on the hash filter */ v &= ~GEM_MAC_RX_PROMISCUOUS; v |= GEM_MAC_RX_HASH_FILTER; /* * Set up multicast address filter by passing all multicast addresses * through a crc generator, and then using the high order 6 bits as an * index into the 256 bit logical address filter. The high order bit * selects the word, while the rest of the bits select the bit within * the word. */ ETHER_FIRST_MULTI(step, ac, enm); while (enm != NULL) { if (ether_cmp(enm->enm_addrlo, enm->enm_addrhi)) { /* * We must listen to a range of multicast addresses. * For now, just accept all multicasts, rather than * trying to set only those filter bits needed to match * the range. (At this time, the only use of address * ranges is for IP multicast routing, for which the * range is big enough to require all bits set.) */ hash[3] = hash[2] = hash[1] = hash[0] = 0xffff; ifp->if_flags |= IFF_ALLMULTI; goto chipit; } cp = enm->enm_addrlo; crc = 0xffffffff; for (len = sizeof(enm->enm_addrlo); --len >= 0;) { int octet = *cp++; int i; #define MC_POLY_LE 0xedb88320UL /* mcast crc, little endian */ for (i = 0; i < 8; i++) { if ((crc & 1) ^ (octet & 1)) { crc >>= 1; crc ^= MC_POLY_LE; } else { crc >>= 1; } octet >>= 1; } } /* Just want the 8 most significant bits. */ crc >>= 24; /* Set the corresponding bit in the filter. */ hash[crc >> 4] |= 1 << (crc & 0xf); ETHER_NEXT_MULTI(step, enm); } ifp->if_flags &= ~IFF_ALLMULTI; chipit: /* Now load the hash table into the chip */ bus_space_write_4(t, h, GEM_MAC_HASH0, hash[0]); bus_space_write_4(t, h, GEM_MAC_HASH1, hash[1]); bus_space_write_4(t, h, GEM_MAC_HASH2, hash[2]); bus_space_write_4(t, h, GEM_MAC_HASH3, hash[3]); bus_space_write_4(t, h, GEM_MAC_HASH4, hash[4]); bus_space_write_4(t, h, GEM_MAC_HASH5, hash[5]); bus_space_write_4(t, h, GEM_MAC_HASH6, hash[6]); bus_space_write_4(t, h, GEM_MAC_HASH7, hash[7]); bus_space_write_4(t, h, GEM_MAC_HASH8, hash[8]); bus_space_write_4(t, h, GEM_MAC_HASH9, hash[9]); bus_space_write_4(t, h, GEM_MAC_HASH10, hash[10]); bus_space_write_4(t, h, GEM_MAC_HASH11, hash[11]); bus_space_write_4(t, h, GEM_MAC_HASH12, hash[12]); bus_space_write_4(t, h, GEM_MAC_HASH13, hash[13]); bus_space_write_4(t, h, GEM_MAC_HASH14, hash[14]); bus_space_write_4(t, h, GEM_MAC_HASH15, hash[15]); bus_space_write_4(t, h, GEM_MAC_RX_CONFIG, v); } #if notyet /* * gem_power: * * Power management (suspend/resume) hook. */ void gem_power(why, arg) int why; void *arg; { struct gem_softc *sc = arg; struct ifnet *ifp = &sc->sc_arpcom.ac_if; int s; s = splnet(); switch (why) { case PWR_SUSPEND: case PWR_STANDBY: gem_stop(ifp, 1); if (sc->sc_power != NULL) (*sc->sc_power)(sc, why); break; case PWR_RESUME: if (ifp->if_flags & IFF_UP) { if (sc->sc_power != NULL) (*sc->sc_power)(sc, why); gem_init(ifp); } break; case PWR_SOFTSUSPEND: case PWR_SOFTSTANDBY: case PWR_SOFTRESUME: break; } splx(s); } #endif