/* * Copyright (c) 1997, 1998, 1999 * Bill Paul . 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 Bill Paul. * 4. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD * 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. * * $FreeBSD$ */ /* * Davicom DM9102 fast ethernet PCI NIC driver. * * Written by Bill Paul * Electrical Engineering Department * Columbia University, New York City */ /* * The Davicom DM9102 is yet another DEC 21x4x clone. This one is actually * a pretty faithful copy. Same RX filter programming, same SROM layout, * same everything. Datasheets available from www.davicom8.com. Only * MII-based transceivers are supported. * * The DM9102's DMA engine seems pretty weak. Multi-fragment transmits * don't seem to work well, and on slow machines you get lots of RX * overruns. */ #include "bpf.h" #include #include #include #include #include #include #include #include #include #include #include #include #if NBPF > 0 #include #endif #include /* for vtophys */ #include /* for vtophys */ #include /* for DELAY */ #include #include #include #include #include #include #include #include #include #include #define DM_USEIOSPACE #include #include "miibus_if.h" #ifndef lint static const char rcsid[] = "$FreeBSD$"; #endif /* * Various supported device vendors/types and their names. */ static struct dm_type dm_devs[] = { { DM_VENDORID, DM_DEVICEID_DM9100, "Davicom DM9100 10/100BaseTX" }, { DM_VENDORID, DM_DEVICEID_DM9102, "Davicom DM9102 10/100BaseTX" }, { 0, 0, NULL } }; static int dm_probe __P((device_t)); static int dm_attach __P((device_t)); static int dm_detach __P((device_t)); static int dm_newbuf __P((struct dm_softc *, struct dm_desc *, struct mbuf *)); static int dm_encap __P((struct dm_softc *, struct mbuf **, u_int32_t *)); static void dm_rxeof __P((struct dm_softc *)); static void dm_rxeoc __P((struct dm_softc *)); static void dm_txeof __P((struct dm_softc *)); static void dm_intr __P((void *)); static void dm_tick __P((void *)); static void dm_start __P((struct ifnet *)); static int dm_ioctl __P((struct ifnet *, u_long, caddr_t)); static void dm_init __P((void *)); static void dm_stop __P((struct dm_softc *)); static void dm_watchdog __P((struct ifnet *)); static void dm_shutdown __P((device_t)); static int dm_ifmedia_upd __P((struct ifnet *)); static void dm_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); static void dm_delay __P((struct dm_softc *)); static void dm_eeprom_idle __P((struct dm_softc *)); static void dm_eeprom_putbyte __P((struct dm_softc *, int)); static void dm_eeprom_getword __P((struct dm_softc *, int, u_int16_t *)); static void dm_read_eeprom __P((struct dm_softc *, caddr_t, int, int, int)); static void dm_mii_writebit __P((struct dm_softc *, int)); static int dm_mii_readbit __P((struct dm_softc *)); static void dm_mii_sync __P((struct dm_softc *)); static void dm_mii_send __P((struct dm_softc *, u_int32_t, int)); static int dm_mii_readreg __P((struct dm_softc *, struct dm_mii_frame *)); static int dm_mii_writereg __P((struct dm_softc *, struct dm_mii_frame *)); static int dm_miibus_readreg __P((device_t, int, int)); static int dm_miibus_writereg __P((device_t, int, int, int)); static void dm_miibus_statchg __P((device_t)); static u_int32_t dm_calchash __P((caddr_t)); static void dm_setfilt __P((struct dm_softc *)); static void dm_reset __P((struct dm_softc *)); static int dm_list_rx_init __P((struct dm_softc *)); static int dm_list_tx_init __P((struct dm_softc *)); #ifdef DM_USEIOSPACE #define DM_RES SYS_RES_IOPORT #define DM_RID DM_PCI_LOIO #else #define DM_RES SYS_RES_MEMORY #define DM_RID DM_PCI_LOMEM #endif static device_method_t dm_methods[] = { /* Device interface */ DEVMETHOD(device_probe, dm_probe), DEVMETHOD(device_attach, dm_attach), DEVMETHOD(device_detach, dm_detach), DEVMETHOD(device_shutdown, dm_shutdown), /* bus interface */ DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_driver_added, bus_generic_driver_added), /* MII interface */ DEVMETHOD(miibus_readreg, dm_miibus_readreg), DEVMETHOD(miibus_writereg, dm_miibus_writereg), DEVMETHOD(miibus_statchg, dm_miibus_statchg), { 0, 0 } }; static driver_t dm_driver = { "dm", dm_methods, sizeof(struct dm_softc) }; static devclass_t dm_devclass; DRIVER_MODULE(dm, pci, dm_driver, dm_devclass, 0, 0); DRIVER_MODULE(miibus, dm, miibus_driver, miibus_devclass, 0, 0); #define DM_SETBIT(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) | x) #define DM_CLRBIT(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) & ~x) #define SIO_SET(x) \ CSR_WRITE_4(sc, DM_SIO, \ CSR_READ_4(sc, DM_SIO) | x) #define SIO_CLR(x) \ CSR_WRITE_4(sc, DM_SIO, \ CSR_READ_4(sc, DM_SIO) & ~x) static void dm_delay(sc) struct dm_softc *sc; { int idx; for (idx = (300 / 33) + 1; idx > 0; idx--) CSR_READ_4(sc, DM_BUSCTL); } static void dm_eeprom_idle(sc) struct dm_softc *sc; { register int i; CSR_WRITE_4(sc, DM_SIO, DM_SIO_EESEL); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_ROMCTL_READ); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CS); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK); dm_delay(sc); for (i = 0; i < 25; i++) { DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CLK); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK); dm_delay(sc); } DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CLK); dm_delay(sc); DM_CLRBIT(sc, DM_SIO, DM_SIO_EE_CS); dm_delay(sc); CSR_WRITE_4(sc, DM_SIO, 0x00000000); return; } /* * Send a read command and address to the EEPROM, check for ACK. */ static void dm_eeprom_putbyte(sc, addr) struct dm_softc *sc; int addr; { register int d, i; d = addr | DM_EECMD_READ; /* * Feed in each bit and stobe the clock. */ for (i = 0x400; i; i >>= 1) { if (d & i) { SIO_SET(DM_SIO_EE_DATAIN); } else { SIO_CLR(DM_SIO_EE_DATAIN); } dm_delay(sc); SIO_SET(DM_SIO_EE_CLK); dm_delay(sc); SIO_CLR(DM_SIO_EE_CLK); dm_delay(sc); } return; } /* * Read a word of data stored in the EEPROM at address 'addr.' */ static void dm_eeprom_getword(sc, addr, dest) struct dm_softc *sc; int addr; u_int16_t *dest; { register int i; u_int16_t word = 0; /* Force EEPROM to idle state. */ dm_eeprom_idle(sc); /* Enter EEPROM access mode. */ CSR_WRITE_4(sc, DM_SIO, DM_SIO_EESEL); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_ROMCTL_READ); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CS); dm_delay(sc); DM_SETBIT(sc, DM_SIO, DM_SIO_EE_CLK); dm_delay(sc); /* * Send address of word we want to read. */ dm_eeprom_putbyte(sc, addr); /* * Start reading bits from EEPROM. */ for (i = 0x8000; i; i >>= 1) { SIO_SET(DM_SIO_EE_CLK); dm_delay(sc); if (CSR_READ_4(sc, DM_SIO) & DM_SIO_EE_DATAOUT) word |= i; dm_delay(sc); SIO_CLR(DM_SIO_EE_CLK); dm_delay(sc); } /* Turn off EEPROM access mode. */ dm_eeprom_idle(sc); *dest = word; return; } /* * Read a sequence of words from the EEPROM. */ static void dm_read_eeprom(sc, dest, off, cnt, swap) struct dm_softc *sc; caddr_t dest; int off; int cnt; int swap; { int i; u_int16_t word = 0, *ptr; for (i = 0; i < cnt; i++) { dm_eeprom_getword(sc, off + i, &word); ptr = (u_int16_t *)(dest + (i * 2)); if (swap) *ptr = ntohs(word); else *ptr = word; } return; } /* * Write a bit to the MII bus. */ static void dm_mii_writebit(sc, bit) struct dm_softc *sc; int bit; { if (bit) CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE|DM_SIO_MII_DATAOUT); else CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE); DM_SETBIT(sc, DM_SIO, DM_SIO_MII_CLK); DM_CLRBIT(sc, DM_SIO, DM_SIO_MII_CLK); return; } /* * Read a bit from the MII bus. */ static int dm_mii_readbit(sc) struct dm_softc *sc; { CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_READ|DM_SIO_MII_DIR); CSR_READ_4(sc, DM_SIO); DM_SETBIT(sc, DM_SIO, DM_SIO_MII_CLK); DM_CLRBIT(sc, DM_SIO, DM_SIO_MII_CLK); if (CSR_READ_4(sc, DM_SIO) & DM_SIO_MII_DATAIN) return(1); return(0); } /* * Sync the PHYs by setting data bit and strobing the clock 32 times. */ static void dm_mii_sync(sc) struct dm_softc *sc; { register int i; CSR_WRITE_4(sc, DM_SIO, DM_SIO_ROMCTL_WRITE); for (i = 0; i < 32; i++) dm_mii_writebit(sc, 1); return; } /* * Clock a series of bits through the MII. */ static void dm_mii_send(sc, bits, cnt) struct dm_softc *sc; u_int32_t bits; int cnt; { int i; for (i = (0x1 << (cnt - 1)); i; i >>= 1) dm_mii_writebit(sc, bits & i); } /* * Read an PHY register through the MII. */ static int dm_mii_readreg(sc, frame) struct dm_softc *sc; struct dm_mii_frame *frame; { int i, ack, s; s = splimp(); /* * Set up frame for RX. */ frame->mii_stdelim = DM_MII_STARTDELIM; frame->mii_opcode = DM_MII_READOP; frame->mii_turnaround = 0; frame->mii_data = 0; /* * Sync the PHYs. */ dm_mii_sync(sc); /* * Send command/address info. */ dm_mii_send(sc, frame->mii_stdelim, 2); dm_mii_send(sc, frame->mii_opcode, 2); dm_mii_send(sc, frame->mii_phyaddr, 5); dm_mii_send(sc, frame->mii_regaddr, 5); #ifdef notdef /* Idle bit */ dm_mii_writebit(sc, 1); dm_mii_writebit(sc, 0); #endif /* Check for ack */ ack = dm_mii_readbit(sc); /* * Now try reading data bits. If the ack failed, we still * need to clock through 16 cycles to keep the PHY(s) in sync. */ if (ack) { for(i = 0; i < 16; i++) { dm_mii_readbit(sc); } goto fail; } for (i = 0x8000; i; i >>= 1) { if (!ack) { if (dm_mii_readbit(sc)) frame->mii_data |= i; } } fail: dm_mii_writebit(sc, 0); dm_mii_writebit(sc, 0); splx(s); if (ack) return(1); return(0); } /* * Write to a PHY register through the MII. */ static int dm_mii_writereg(sc, frame) struct dm_softc *sc; struct dm_mii_frame *frame; { int s; s = splimp(); /* * Set up frame for TX. */ frame->mii_stdelim = DM_MII_STARTDELIM; frame->mii_opcode = DM_MII_WRITEOP; frame->mii_turnaround = DM_MII_TURNAROUND; /* * Sync the PHYs. */ dm_mii_sync(sc); dm_mii_send(sc, frame->mii_stdelim, 2); dm_mii_send(sc, frame->mii_opcode, 2); dm_mii_send(sc, frame->mii_phyaddr, 5); dm_mii_send(sc, frame->mii_regaddr, 5); dm_mii_send(sc, frame->mii_turnaround, 2); dm_mii_send(sc, frame->mii_data, 16); /* Idle bit. */ dm_mii_writebit(sc, 0); dm_mii_writebit(sc, 0); splx(s); return(0); } static int dm_miibus_readreg(dev, phy, reg) device_t dev; int phy, reg; { struct dm_softc *sc; struct dm_mii_frame frame; sc = device_get_softc(dev); bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; dm_mii_readreg(sc, &frame); return(frame.mii_data); } static int dm_miibus_writereg(dev, phy, reg, data) device_t dev; int phy, reg, data; { struct dm_softc *sc; struct dm_mii_frame frame; sc = device_get_softc(dev); bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; frame.mii_data = data; dm_mii_writereg(sc, &frame); return(0); } static void dm_miibus_statchg(dev) device_t dev; { struct dm_softc *sc; struct mii_data *mii; sc = device_get_softc(dev); mii = device_get_softc(sc->dm_miibus); if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL); else DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL); if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_FULLDUPLEX); else DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_FULLDUPLEX); return; } #define DM_POLY 0xEDB88320 #define DM_BITS 9 static u_int32_t dm_calchash(addr) caddr_t addr; { u_int32_t idx, bit, data, crc; /* Compute CRC for the address value. */ crc = 0xFFFFFFFF; /* initial value */ for (idx = 0; idx < 6; idx++) { for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) crc = (crc >> 1) ^ (((crc ^ data) & 1) ? DM_POLY : 0); } return (crc & ((1 << DM_BITS) - 1)); } void dm_setfilt(sc) struct dm_softc *sc; { struct dm_desc *sframe; u_int32_t h, *sp; struct ifmultiaddr *ifma; struct ifnet *ifp; int i; ifp = &sc->arpcom.ac_if; DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON); DM_SETBIT(sc, DM_ISR, DM_ISR_TX_IDLE); sframe = &sc->dm_ldata->dm_sframe; sp = (u_int32_t *)&sc->dm_cdata.dm_sbuf; bzero((char *)sp, DM_SFRAME_LEN); sframe->dm_next = vtophys(&sc->dm_ldata->dm_tx_list[0]); sframe->dm_data = vtophys(&sc->dm_cdata.dm_sbuf); sframe->dm_ctl = DM_SFRAME_LEN | DM_TXCTL_TLINK | DM_TXCTL_SETUP | DM_FILTER_HASHPERF; /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC); else DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC); if (ifp->if_flags & IFF_ALLMULTI) DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_ALLMULTI); for (ifma = ifp->if_multiaddrs.lh_first; ifma != NULL; ifma = ifma->ifma_link.le_next) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; h = dm_calchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); sp[h >> 4] |= 1 << (h & 0xF); } if (ifp->if_flags & IFF_BROADCAST) { h = dm_calchash((caddr_t)ðerbroadcastaddr); sp[h >> 4] |= 1 << (h & 0xF); } sp[39] = ((u_int16_t *)sc->arpcom.ac_enaddr)[0]; sp[40] = ((u_int16_t *)sc->arpcom.ac_enaddr)[1]; sp[41] = ((u_int16_t *)sc->arpcom.ac_enaddr)[2]; CSR_WRITE_4(sc, DM_TXADDR, vtophys(sframe)); DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON); sframe->dm_status = DM_TXSTAT_OWN; CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF); DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON); /* * Wait for chip to clear the 'own' bit. */ for (i = 0; i < DM_TIMEOUT; i++) { DELAY(10); if (sframe->dm_status != DM_TXSTAT_OWN) break; } if (i == DM_TIMEOUT) printf("dm%d: failed to send setup frame\n", sc->dm_unit); DM_SETBIT(sc, DM_ISR, DM_ISR_TX_NOBUF|DM_ISR_TX_IDLE); return; } static void dm_reset(sc) struct dm_softc *sc; { register int i; DM_SETBIT(sc, DM_BUSCTL, DM_BUSCTL_RESET); for (i = 0; i < DM_TIMEOUT; i++) { DELAY(10); if (!(CSR_READ_4(sc, DM_BUSCTL) & DM_BUSCTL_RESET)) break; } if (i == DM_TIMEOUT) printf("dm%d: reset never completed!\n", sc->dm_unit); CSR_WRITE_4(sc, DM_BUSCTL, 0); /* Wait a little while for the chip to get its brains in order. */ DELAY(1000); return; } /* * Probe for an Davicom chip. Check the PCI vendor and device * IDs against our list and return a device name if we find a match. */ static int dm_probe(dev) device_t dev; { struct dm_type *t; t = dm_devs; while(t->dm_name != NULL) { if ((pci_get_vendor(dev) == t->dm_vid) && (pci_get_device(dev) == t->dm_did)) { device_set_desc(dev, t->dm_name); return(0); } t++; } return(ENXIO); } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ static int dm_attach(dev) device_t dev; { int s; u_char eaddr[ETHER_ADDR_LEN]; u_int32_t command; struct dm_softc *sc; struct ifnet *ifp; int unit, error = 0, rid; s = splimp(); sc = device_get_softc(dev); unit = device_get_unit(dev); bzero(sc, sizeof(struct dm_softc)); /* * Handle power management nonsense. */ command = pci_read_config(dev, DM_PCI_CAPID, 4) & 0x000000FF; if (command == 0x01) { command = pci_read_config(dev, DM_PCI_PWRMGMTCTRL, 4); if (command & DM_PSTATE_MASK) { u_int32_t iobase, membase, irq; /* Save important PCI config data. */ iobase = pci_read_config(dev, DM_PCI_LOIO, 4); membase = pci_read_config(dev, DM_PCI_LOMEM, 4); irq = pci_read_config(dev, DM_PCI_INTLINE, 4); /* Reset the power state. */ printf("dm%d: chip is in D%d power mode " "-- setting to D0\n", unit, command & DM_PSTATE_MASK); command &= 0xFFFFFFFC; pci_write_config(dev, DM_PCI_PWRMGMTCTRL, command, 4); /* Restore PCI config data. */ pci_write_config(dev, DM_PCI_LOIO, iobase, 4); pci_write_config(dev, DM_PCI_LOMEM, membase, 4); pci_write_config(dev, DM_PCI_INTLINE, irq, 4); } } /* * Map control/status registers. */ command = pci_read_config(dev, PCI_COMMAND_STATUS_REG, 4); command |= (PCIM_CMD_PORTEN|PCIM_CMD_MEMEN|PCIM_CMD_BUSMASTEREN); pci_write_config(dev, PCI_COMMAND_STATUS_REG, command, 4); command = pci_read_config(dev, PCI_COMMAND_STATUS_REG, 4); #ifdef DM_USEIOSPACE if (!(command & PCIM_CMD_PORTEN)) { printf("dm%d: failed to enable I/O ports!\n", unit); error = ENXIO;; goto fail; } #else if (!(command & PCIM_CMD_MEMEN)) { printf("dm%d: failed to enable memory mapping!\n", unit); error = ENXIO;; goto fail; } #endif rid = DM_RID; sc->dm_res = bus_alloc_resource(dev, DM_RES, &rid, 0, ~0, 1, RF_ACTIVE); if (sc->dm_res == NULL) { printf("dm%d: couldn't map ports/memory\n", unit); error = ENXIO; goto fail; } sc->dm_btag = rman_get_bustag(sc->dm_res); sc->dm_bhandle = rman_get_bushandle(sc->dm_res); /* Allocate interrupt */ rid = 0; sc->dm_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_SHAREABLE | RF_ACTIVE); if (sc->dm_irq == NULL) { printf("dm%d: couldn't map interrupt\n", unit); bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res); error = ENXIO; goto fail; } error = bus_setup_intr(dev, sc->dm_irq, INTR_TYPE_NET, dm_intr, sc, &sc->dm_intrhand); if (error) { bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_res); bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res); printf("dm%d: couldn't set up irq\n", unit); goto fail; } /* Save the cache line size. */ sc->dm_cachesize = pci_read_config(dev, DM_PCI_CACHELEN, 4) & 0xFF; /* Reset the adapter. */ dm_reset(sc); /* * Get station address from the EEPROM. */ dm_read_eeprom(sc, (caddr_t)&eaddr, DM_EE_NODEADDR, 3, 0); /* * A Davicom chip was detected. Inform the world. */ printf("dm%d: Ethernet address: %6D\n", unit, eaddr, ":"); sc->dm_unit = unit; callout_handle_init(&sc->dm_stat_ch); bcopy(eaddr, (char *)&sc->arpcom.ac_enaddr, ETHER_ADDR_LEN); sc->dm_ldata = contigmalloc(sizeof(struct dm_list_data), M_DEVBUF, M_NOWAIT, 0x100000, 0xffffffff, PAGE_SIZE, 0); if (sc->dm_ldata == NULL) { printf("dm%d: no memory for list buffers!\n", unit); bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand); bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq); bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res); error = ENXIO; goto fail; } bzero(sc->dm_ldata, sizeof(struct dm_list_data)); ifp = &sc->arpcom.ac_if; ifp->if_softc = sc; ifp->if_unit = unit; ifp->if_name = "dm"; ifp->if_mtu = ETHERMTU; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = dm_ioctl; ifp->if_output = ether_output; ifp->if_start = dm_start; ifp->if_watchdog = dm_watchdog; ifp->if_init = dm_init; ifp->if_baudrate = 10000000; ifp->if_snd.ifq_maxlen = DM_TX_LIST_CNT - 1; /* * Do MII setup. */ if (mii_phy_probe(dev, &sc->dm_miibus, dm_ifmedia_upd, dm_ifmedia_sts)) { printf("dm%d: MII without any PHY!\n", sc->dm_unit); bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand); bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq); bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res); error = ENXIO; goto fail; } /* * Call MI attach routines. */ if_attach(ifp); ether_ifattach(ifp); #if NBPF > 0 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif fail: splx(s); return(error); } static int dm_detach(dev) device_t dev; { struct dm_softc *sc; struct ifnet *ifp; int s; s = splimp(); sc = device_get_softc(dev); ifp = &sc->arpcom.ac_if; dm_reset(sc); dm_stop(sc); if_detach(ifp); bus_generic_detach(dev); device_delete_child(dev, sc->dm_miibus); bus_teardown_intr(dev, sc->dm_irq, sc->dm_intrhand); bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dm_irq); bus_release_resource(dev, DM_RES, DM_RID, sc->dm_res); contigfree(sc->dm_ldata, sizeof(struct dm_list_data), M_DEVBUF); splx(s); return(0); } /* * Initialize the transmit descriptors. */ static int dm_list_tx_init(sc) struct dm_softc *sc; { struct dm_chain_data *cd; struct dm_list_data *ld; int i; cd = &sc->dm_cdata; ld = sc->dm_ldata; for (i = 0; i < DM_TX_LIST_CNT; i++) { if (i == (DM_TX_LIST_CNT - 1)) { ld->dm_tx_list[i].dm_nextdesc = &ld->dm_tx_list[0]; ld->dm_tx_list[i].dm_next = vtophys(&ld->dm_tx_list[0]); } else { ld->dm_tx_list[i].dm_nextdesc = &ld->dm_tx_list[i + 1]; ld->dm_tx_list[i].dm_next = vtophys(&ld->dm_tx_list[i + 1]); } ld->dm_tx_list[i].dm_mbuf = NULL; ld->dm_tx_list[i].dm_data = 0; ld->dm_tx_list[i].dm_ctl = 0; } cd->dm_tx_prod = cd->dm_tx_cons = cd->dm_tx_cnt = 0; return(0); } /* * Initialize the RX descriptors and allocate mbufs for them. Note that * we arrange the descriptors in a closed ring, so that the last descriptor * points back to the first. */ static int dm_list_rx_init(sc) struct dm_softc *sc; { struct dm_chain_data *cd; struct dm_list_data *ld; int i; cd = &sc->dm_cdata; ld = sc->dm_ldata; for (i = 0; i < DM_RX_LIST_CNT; i++) { if (dm_newbuf(sc, &ld->dm_rx_list[i], NULL) == ENOBUFS) return(ENOBUFS); if (i == (DM_RX_LIST_CNT - 1)) { ld->dm_rx_list[i].dm_nextdesc = &ld->dm_rx_list[0]; ld->dm_rx_list[i].dm_next = vtophys(&ld->dm_rx_list[0]); } else { ld->dm_rx_list[i].dm_nextdesc = &ld->dm_rx_list[i + 1]; ld->dm_rx_list[i].dm_next = vtophys(&ld->dm_rx_list[i + 1]); } } cd->dm_rx_prod = 0; return(0); } /* * Initialize an RX descriptor and attach an MBUF cluster. * Note: the length fields are only 11 bits wide, which means the * largest size we can specify is 2047. This is important because * MCLBYTES is 2048, so we have to subtract one otherwise we'll * overflow the field and make a mess. */ static int dm_newbuf(sc, c, m) struct dm_softc *sc; struct dm_desc *c; struct mbuf *m; { struct mbuf *m_new = NULL; if (m == NULL) { MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("dm%d: no memory for rx list " "-- packet dropped!\n", sc->dm_unit); return(ENOBUFS); } MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { printf("dm%d: no memory for rx list " "-- packet dropped!\n", sc->dm_unit); m_freem(m_new); return(ENOBUFS); } m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; } else { m_new = m; m_new->m_len = m_new->m_pkthdr.len = MCLBYTES; m_new->m_data = m_new->m_ext.ext_buf; } m_adj(m_new, sizeof(u_int64_t)); c->dm_mbuf = m_new; c->dm_data = vtophys(mtod(m_new, caddr_t)); c->dm_ctl = DM_RXCTL_RLINK | DM_RXLEN; c->dm_status = DM_RXSTAT_OWN; return(0); } /* * A frame has been uploaded: pass the resulting mbuf chain up to * the higher level protocols. */ static void dm_rxeof(sc) struct dm_softc *sc; { struct ether_header *eh; struct mbuf *m; struct ifnet *ifp; struct dm_desc *cur_rx; int i, total_len = 0; u_int32_t rxstat; ifp = &sc->arpcom.ac_if; i = sc->dm_cdata.dm_rx_prod; while(!(sc->dm_ldata->dm_rx_list[i].dm_status & DM_RXSTAT_OWN)) { struct mbuf *m0 = NULL; cur_rx = &sc->dm_ldata->dm_rx_list[i]; rxstat = cur_rx->dm_status; m = cur_rx->dm_mbuf; cur_rx->dm_mbuf = NULL; total_len = DM_RXBYTES(rxstat); DM_INC(i, DM_RX_LIST_CNT); /* * If an error occurs, update stats, clear the * status word and leave the mbuf cluster in place: * it should simply get re-used next time this descriptor * comes up in the ring. */ if (rxstat & DM_RXSTAT_RXERR) { ifp->if_ierrors++; if (rxstat & DM_RXSTAT_COLLSEEN) ifp->if_collisions++; dm_newbuf(sc, cur_rx, m); dm_init(sc); return; } /* No errors; receive the packet. */ total_len -= ETHER_CRC_LEN; m0 = m_devget(mtod(m, char *) - ETHER_ALIGN, total_len + ETHER_ALIGN, 0, ifp, NULL); dm_newbuf(sc, cur_rx, m); if (m0 == NULL) { ifp->if_ierrors++; continue; } m_adj(m0, ETHER_ALIGN); m = m0; ifp->if_ipackets++; eh = mtod(m, struct ether_header *); #if NBPF > 0 /* * Handle BPF listeners. Let the BPF user see the packet, but * don't pass it up to the ether_input() layer unless it's * a broadcast packet, multicast packet, matches our ethernet * address or the interface is in promiscuous mode. */ if (ifp->if_bpf) { bpf_mtap(ifp, m); if (ifp->if_flags & IFF_PROMISC && (bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, ETHER_ADDR_LEN) && (eh->ether_dhost[0] & 1) == 0)) { m_freem(m); continue; } } #endif /* Remove header from mbuf and pass it on. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); } sc->dm_cdata.dm_rx_prod = i; return; } void dm_rxeoc(sc) struct dm_softc *sc; { dm_rxeof(sc); DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_ON); CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF); return; } /* * A frame was downloaded to the chip. It's safe for us to clean up * the list buffers. */ static void dm_txeof(sc) struct dm_softc *sc; { struct dm_desc *cur_tx = NULL; struct ifnet *ifp; int idx; ifp = &sc->arpcom.ac_if; /* Clear the timeout timer. */ ifp->if_timer = 0; /* * Go through our tx list and free mbufs for those * frames that have been transmitted. */ idx = sc->dm_cdata.dm_tx_cons; while(idx != sc->dm_cdata.dm_tx_prod) { u_int32_t txstat; cur_tx = &sc->dm_ldata->dm_tx_list[idx]; txstat = cur_tx->dm_status; if (txstat & DM_TXSTAT_OWN) break; if (!(cur_tx->dm_ctl & DM_TXCTL_LASTFRAG)) { sc->dm_cdata.dm_tx_cnt--; DM_INC(idx, DM_TX_LIST_CNT); continue; } if (txstat & DM_TXSTAT_ERRSUM) { ifp->if_oerrors++; if (txstat & DM_TXSTAT_EXCESSCOLL) ifp->if_collisions++; if (txstat & DM_TXSTAT_LATECOLL) ifp->if_collisions++; dm_init(sc); return; } ifp->if_collisions += (txstat & DM_TXSTAT_COLLCNT) >> 3; ifp->if_opackets++; if (cur_tx->dm_mbuf != NULL) { m_freem(cur_tx->dm_mbuf); cur_tx->dm_mbuf = NULL; } sc->dm_cdata.dm_tx_cnt--; DM_INC(idx, DM_TX_LIST_CNT); ifp->if_timer = 0; } sc->dm_cdata.dm_tx_cons = idx; if (cur_tx != NULL) ifp->if_flags &= ~IFF_OACTIVE; return; } static void dm_tick(xsc) void *xsc; { struct dm_softc *sc; struct mii_data *mii; int s; s = splimp(); sc = xsc; mii = device_get_softc(sc->dm_miibus); mii_tick(mii); sc->dm_stat_ch = timeout(dm_tick, sc, hz); splx(s); return; } static void dm_intr(arg) void *arg; { struct dm_softc *sc; struct ifnet *ifp; u_int32_t status; sc = arg; ifp = &sc->arpcom.ac_if; /* Supress unwanted interrupts */ if (!(ifp->if_flags & IFF_UP)) { dm_stop(sc); return; } /* Disable interrupts. */ CSR_WRITE_4(sc, DM_IMR, 0x00000000); for (;;) { status = CSR_READ_4(sc, DM_ISR); if (status) CSR_WRITE_4(sc, DM_ISR, status); if ((status & DM_INTRS) == 0) break; if ((status & DM_ISR_TX_OK) || (status & DM_ISR_TX_EARLY)) dm_txeof(sc); if (status & DM_ISR_TX_NOBUF) dm_txeof(sc); if (status & DM_ISR_TX_IDLE) { dm_txeof(sc); if (sc->dm_cdata.dm_tx_cnt) { DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON); CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF); } } if (status & DM_ISR_TX_UNDERRUN) { u_int32_t cfg; cfg = CSR_READ_4(sc, DM_NETCFG); if ((cfg & DM_NETCFG_TX_THRESH) == DM_TXTHRESH_160BYTES) DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_STORENFWD); else CSR_WRITE_4(sc, DM_NETCFG, cfg + 0x4000); } if (status & DM_ISR_RX_OK) { dm_rxeof(sc); DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_ON); CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF); } if ((status & DM_ISR_RX_WATDOGTIMEO) || (status & DM_ISR_RX_NOBUF)) dm_rxeoc(sc); if (status & DM_ISR_BUS_ERR) { dm_reset(sc); dm_init(sc); } } /* Re-enable interrupts. */ CSR_WRITE_4(sc, DM_IMR, DM_INTRS); if (ifp->if_snd.ifq_head != NULL) dm_start(ifp); return; } /* * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data * pointers to the fragment pointers. */ static int dm_encap(sc, m_head, txidx) struct dm_softc *sc; struct mbuf **m_head; u_int32_t *txidx; { struct dm_desc *f = NULL; struct mbuf *m; int frag, cur, cnt = 0; struct mbuf *m_new = NULL; m = *m_head; MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("dm%d: no memory for tx list", sc->dm_unit); return(ENOBUFS); } if (m->m_pkthdr.len > MHLEN) { MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { m_freem(m_new); printf("dm%d: no memory for tx list", sc->dm_unit); return(ENOBUFS); } } m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; m_freem(m); *m_head = m_new; /* * Start packing the mbufs in this chain into * the fragment pointers. Stop when we run out * of fragments or hit the end of the mbuf chain. */ cur = frag = *txidx; for (m = m_new; m != NULL; m = m->m_next) { if (m->m_len != 0) { if ((DM_TX_LIST_CNT - (sc->dm_cdata.dm_tx_cnt + cnt)) < 2) return(ENOBUFS); f = &sc->dm_ldata->dm_tx_list[frag]; f->dm_ctl = DM_TXCTL_TLINK | m->m_len; if (cnt == 0) { f->dm_status = 0; f->dm_ctl |= DM_TXCTL_FIRSTFRAG; } else f->dm_status = DM_TXSTAT_OWN; f->dm_data = vtophys(mtod(m, vm_offset_t)); cur = frag; DM_INC(frag, DM_TX_LIST_CNT); cnt++; } } if (m != NULL) return(ENOBUFS); sc->dm_ldata->dm_tx_list[cur].dm_mbuf = *m_head; sc->dm_ldata->dm_tx_list[cur].dm_ctl |= DM_TXCTL_LASTFRAG|DM_TXCTL_FINT; sc->dm_ldata->dm_tx_list[*txidx].dm_status |= DM_TXSTAT_OWN; sc->dm_cdata.dm_tx_cnt += cnt; *txidx = frag; return(0); } /* * Main transmit routine. To avoid having to do mbuf copies, we put pointers * to the mbuf data regions directly in the transmit lists. We also save a * copy of the pointers since the transmit list fragment pointers are * physical addresses. */ static void dm_start(ifp) struct ifnet *ifp; { struct dm_softc *sc; struct mbuf *m_head = NULL; u_int32_t idx; sc = ifp->if_softc; if (ifp->if_flags & IFF_OACTIVE) return; idx = sc->dm_cdata.dm_tx_prod; while(sc->dm_ldata->dm_tx_list[idx].dm_mbuf == NULL) { IF_DEQUEUE(&ifp->if_snd, m_head); if (m_head == NULL) break; if (dm_encap(sc, &m_head, &idx)) { IF_PREPEND(&ifp->if_snd, m_head); ifp->if_flags |= IFF_OACTIVE; break; } #if NBPF > 0 /* * If there's a BPF listener, bounce a copy of this frame * to him. */ if (ifp->if_bpf) bpf_mtap(ifp, m_head); #endif } sc->dm_cdata.dm_tx_prod = idx; CSR_WRITE_4(sc, DM_TXSTART, 0xFFFFFFFF); /* * Set a timeout in case the chip goes out to lunch. */ ifp->if_timer = 5; return; } static void dm_init(xsc) void *xsc; { struct dm_softc *sc = xsc; struct ifnet *ifp = &sc->arpcom.ac_if; struct mii_data *mii; int s; s = splimp(); /* * Cancel pending I/O and free all RX/TX buffers. */ dm_stop(sc); dm_reset(sc); mii = device_get_softc(sc->dm_miibus); /* * Set cache alignment and burst length. */ CSR_WRITE_4(sc, DM_BUSCTL, DM_BURSTLEN_32LONG); switch(sc->dm_cachesize) { case 32: DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_32LONG); break; case 16: DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_16LONG); break; case 8: DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_8LONG); break; case 0: default: DM_SETBIT(sc, DM_BUSCTL, DM_CACHEALIGN_NONE); break; } DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_HEARTBEAT); DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_STORENFWD); DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_TX_THRESH); DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_SPEEDSEL); if (IFM_SUBTYPE(mii->mii_media.ifm_media) == IFM_10_T) DM_SETBIT(sc, DM_NETCFG, DM_TXTHRESH_160BYTES); else DM_SETBIT(sc, DM_NETCFG, DM_TXTHRESH_72BYTES); /* Init circular RX list. */ if (dm_list_rx_init(sc) == ENOBUFS) { printf("dm%d: initialization failed: no " "memory for rx buffers\n", sc->dm_unit); dm_stop(sc); (void)splx(s); return; } /* * Init tx descriptors. */ dm_list_tx_init(sc); /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) { DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC); } else { DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_PROMISC); } /* * Set the capture broadcast bit to capture broadcast frames. */ if (ifp->if_flags & IFF_BROADCAST) { DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_RX_BROAD); } else { DM_CLRBIT(sc, DM_NETCFG, DM_NETCFG_RX_BROAD); } /* * Load the RX/multicast filter. */ dm_setfilt(sc); /* * Load the address of the RX and TX lists. */ CSR_WRITE_4(sc, DM_RXADDR, vtophys(&sc->dm_ldata->dm_rx_list[0])); /*CSR_WRITE_4(sc, DM_TXADDR, vtophys(&sc->dm_ldata->dm_tx_list[0]));*/ /* * Enable interrupts. */ CSR_WRITE_4(sc, DM_IMR, DM_INTRS); CSR_WRITE_4(sc, DM_ISR, 0xFFFFFFFF); /* Enable receiver and transmitter. */ DM_SETBIT(sc, DM_NETCFG, DM_NETCFG_TX_ON|DM_NETCFG_RX_ON); CSR_WRITE_4(sc, DM_RXSTART, 0xFFFFFFFF); mii_mediachg(mii); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; (void)splx(s); sc->dm_stat_ch = timeout(dm_tick, sc, hz); return; } /* * Set media options. */ static int dm_ifmedia_upd(ifp) struct ifnet *ifp; { struct dm_softc *sc; sc = ifp->if_softc; if (ifp->if_flags & IFF_UP) dm_init(sc); return(0); } /* * Report current media status. */ static void dm_ifmedia_sts(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct dm_softc *sc; struct mii_data *mii; sc = ifp->if_softc; mii = device_get_softc(sc->dm_miibus); mii_pollstat(mii); ifmr->ifm_active = mii->mii_media_active; ifmr->ifm_status = mii->mii_media_status; return; } static int dm_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { struct dm_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; struct mii_data *mii; int s, error = 0; s = splimp(); switch(command) { case SIOCSIFADDR: case SIOCGIFADDR: case SIOCSIFMTU: error = ether_ioctl(ifp, command, data); break; case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { dm_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) dm_stop(sc); } error = 0; break; case SIOCADDMULTI: case SIOCDELMULTI: dm_init(sc); error = 0; break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: mii = device_get_softc(sc->dm_miibus); error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command); break; default: error = EINVAL; break; } (void)splx(s); return(error); } static void dm_watchdog(ifp) struct ifnet *ifp; { struct dm_softc *sc; sc = ifp->if_softc; ifp->if_oerrors++; printf("dm%d: watchdog timeout\n", sc->dm_unit); dm_stop(sc); dm_reset(sc); dm_init(sc); if (ifp->if_snd.ifq_head != NULL) dm_start(ifp); return; } /* * Stop the adapter and free any mbufs allocated to the * RX and TX lists. */ static void dm_stop(sc) struct dm_softc *sc; { register int i; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; ifp->if_timer = 0; untimeout(dm_tick, sc, sc->dm_stat_ch); DM_CLRBIT(sc, DM_NETCFG, (DM_NETCFG_RX_ON|DM_NETCFG_TX_ON)); CSR_WRITE_4(sc, DM_IMR, 0x00000000); CSR_WRITE_4(sc, DM_TXADDR, 0x00000000); CSR_WRITE_4(sc, DM_RXADDR, 0x00000000); /* * Free data in the RX lists. */ for (i = 0; i < DM_RX_LIST_CNT; i++) { if (sc->dm_ldata->dm_rx_list[i].dm_mbuf != NULL) { m_freem(sc->dm_ldata->dm_rx_list[i].dm_mbuf); sc->dm_ldata->dm_rx_list[i].dm_mbuf = NULL; } } bzero((char *)&sc->dm_ldata->dm_rx_list, sizeof(sc->dm_ldata->dm_rx_list)); /* * Free the TX list buffers. */ for (i = 0; i < DM_TX_LIST_CNT; i++) { if (sc->dm_ldata->dm_tx_list[i].dm_mbuf != NULL) { m_freem(sc->dm_ldata->dm_tx_list[i].dm_mbuf); sc->dm_ldata->dm_tx_list[i].dm_mbuf = NULL; } } bzero((char *)&sc->dm_ldata->dm_tx_list, sizeof(sc->dm_ldata->dm_tx_list)); ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); return; } /* * Stop all chip I/O so that the kernel's probe routines don't * get confused by errant DMAs when rebooting. */ static void dm_shutdown(dev) device_t dev; { struct dm_softc *sc; sc = device_get_softc(dev); dm_reset(sc); dm_stop(sc); return; }