/* $OpenBSD: if_vr.c,v 1.13 2001/02/20 19:39:44 mickey Exp $ */ /* * Copyright (c) 1997, 1998 * 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: src/sys/pci/if_vr.c,v 1.40 2001/02/06 10:11:48 phk Exp $ */ /* * VIA Rhine fast ethernet PCI NIC driver * * Supports various network adapters based on the VIA Rhine * and Rhine II PCI controllers, including the D-Link DFE530TX. * Datasheets are available at http://www.via.com.tw. * * Written by Bill Paul * Electrical Engineering Department * Columbia University, New York City */ /* * The VIA Rhine controllers are similar in some respects to the * the DEC tulip chips, except less complicated. The controller * uses an MII bus and an external physical layer interface. The * receiver has a one entry perfect filter and a 64-bit hash table * multicast filter. Transmit and receive descriptors are similar * to the tulip. * * The Rhine has a serious flaw in its transmit DMA mechanism: * transmit buffers must be longword aligned. Unfortunately, * FreeBSD doesn't guarantee that mbufs will be filled in starting * at longword boundaries, so we have to do a buffer copy before * transmission. */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #include #endif /* INET */ #include #include #if NBPFILTER > 0 #include #endif #include /* for vtophys */ #include /* for vtophys */ #include #include #include #include #include #define VR_USEIOSPACE #include int vr_probe __P((struct device *, void *, void *)); void vr_attach __P((struct device *, struct device *, void *)); struct cfattach vr_ca = { sizeof(struct vr_softc), vr_probe, vr_attach }; struct cfdriver vr_cd = { 0, "vr", DV_IFNET }; int vr_newbuf __P((struct vr_softc *, struct vr_chain_onefrag *, struct mbuf *)); int vr_encap __P((struct vr_softc *, struct vr_chain *, struct mbuf * )); void vr_rxeof __P((struct vr_softc *)); void vr_rxeoc __P((struct vr_softc *)); void vr_txeof __P((struct vr_softc *)); void vr_txeoc __P((struct vr_softc *)); void vr_tick __P((void *)); int vr_intr __P((void *)); void vr_start __P((struct ifnet *)); int vr_ioctl __P((struct ifnet *, u_long, caddr_t)); void vr_init __P((void *)); void vr_stop __P((struct vr_softc *)); void vr_watchdog __P((struct ifnet *)); void vr_shutdown __P((void *)); int vr_ifmedia_upd __P((struct ifnet *)); void vr_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); void vr_mii_sync __P((struct vr_softc *)); void vr_mii_send __P((struct vr_softc *, u_int32_t, int)); int vr_mii_readreg __P((struct vr_softc *, struct vr_mii_frame *)); int vr_mii_writereg __P((struct vr_softc *, struct vr_mii_frame *)); int vr_miibus_readreg __P((struct device *, int, int)); void vr_miibus_writereg __P((struct device *, int, int, int)); void vr_miibus_statchg __P((struct device *)); void vr_setcfg __P((struct vr_softc *, int)); u_int8_t vr_calchash __P((u_int8_t *)); void vr_setmulti __P((struct vr_softc *)); void vr_reset __P((struct vr_softc *)); int vr_list_rx_init __P((struct vr_softc *)); int vr_list_tx_init __P((struct vr_softc *)); #define VR_SETBIT(sc, reg, x) \ CSR_WRITE_1(sc, reg, \ CSR_READ_1(sc, reg) | x) #define VR_CLRBIT(sc, reg, x) \ CSR_WRITE_1(sc, reg, \ CSR_READ_1(sc, reg) & ~x) #define VR_SETBIT16(sc, reg, x) \ CSR_WRITE_2(sc, reg, \ CSR_READ_2(sc, reg) | x) #define VR_CLRBIT16(sc, reg, x) \ CSR_WRITE_2(sc, reg, \ CSR_READ_2(sc, reg) & ~x) #define VR_SETBIT32(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) | x) #define VR_CLRBIT32(sc, reg, x) \ CSR_WRITE_4(sc, reg, \ CSR_READ_4(sc, reg) & ~x) #define SIO_SET(x) \ CSR_WRITE_1(sc, VR_MIICMD, \ CSR_READ_1(sc, VR_MIICMD) | x) #define SIO_CLR(x) \ CSR_WRITE_1(sc, VR_MIICMD, \ CSR_READ_1(sc, VR_MIICMD) & ~x) /* * Sync the PHYs by setting data bit and strobing the clock 32 times. */ void vr_mii_sync(sc) struct vr_softc *sc; { register int i; SIO_SET(VR_MIICMD_DIR|VR_MIICMD_DATAIN); for (i = 0; i < 32; i++) { SIO_SET(VR_MIICMD_CLK); DELAY(1); SIO_CLR(VR_MIICMD_CLK); DELAY(1); } return; } /* * Clock a series of bits through the MII. */ void vr_mii_send(sc, bits, cnt) struct vr_softc *sc; u_int32_t bits; int cnt; { int i; SIO_CLR(VR_MIICMD_CLK); for (i = (0x1 << (cnt - 1)); i; i >>= 1) { if (bits & i) { SIO_SET(VR_MIICMD_DATAIN); } else { SIO_CLR(VR_MIICMD_DATAIN); } DELAY(1); SIO_CLR(VR_MIICMD_CLK); DELAY(1); SIO_SET(VR_MIICMD_CLK); } } /* * Read an PHY register through the MII. */ int vr_mii_readreg(sc, frame) struct vr_softc *sc; struct vr_mii_frame *frame; { int i, ack, s; s = splimp(); /* * Set up frame for RX. */ frame->mii_stdelim = VR_MII_STARTDELIM; frame->mii_opcode = VR_MII_READOP; frame->mii_turnaround = 0; frame->mii_data = 0; CSR_WRITE_1(sc, VR_MIICMD, 0); VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); /* * Turn on data xmit. */ SIO_SET(VR_MIICMD_DIR); vr_mii_sync(sc); /* * Send command/address info. */ vr_mii_send(sc, frame->mii_stdelim, 2); vr_mii_send(sc, frame->mii_opcode, 2); vr_mii_send(sc, frame->mii_phyaddr, 5); vr_mii_send(sc, frame->mii_regaddr, 5); /* Idle bit */ SIO_CLR((VR_MIICMD_CLK|VR_MIICMD_DATAIN)); DELAY(1); SIO_SET(VR_MIICMD_CLK); DELAY(1); /* Turn off xmit. */ SIO_CLR(VR_MIICMD_DIR); /* Check for ack */ SIO_CLR(VR_MIICMD_CLK); DELAY(1); SIO_SET(VR_MIICMD_CLK); DELAY(1); ack = CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT; /* * 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++) { SIO_CLR(VR_MIICMD_CLK); DELAY(1); SIO_SET(VR_MIICMD_CLK); DELAY(1); } goto fail; } for (i = 0x8000; i; i >>= 1) { SIO_CLR(VR_MIICMD_CLK); DELAY(1); if (!ack) { if (CSR_READ_4(sc, VR_MIICMD) & VR_MIICMD_DATAOUT) frame->mii_data |= i; DELAY(1); } SIO_SET(VR_MIICMD_CLK); DELAY(1); } fail: SIO_CLR(VR_MIICMD_CLK); DELAY(1); SIO_SET(VR_MIICMD_CLK); DELAY(1); splx(s); if (ack) return(1); return(0); } /* * Write to a PHY register through the MII. */ int vr_mii_writereg(sc, frame) struct vr_softc *sc; struct vr_mii_frame *frame; { int s; s = splimp(); CSR_WRITE_1(sc, VR_MIICMD, 0); VR_SETBIT(sc, VR_MIICMD, VR_MIICMD_DIRECTPGM); /* * Set up frame for TX. */ frame->mii_stdelim = VR_MII_STARTDELIM; frame->mii_opcode = VR_MII_WRITEOP; frame->mii_turnaround = VR_MII_TURNAROUND; /* * Turn on data output. */ SIO_SET(VR_MIICMD_DIR); vr_mii_sync(sc); vr_mii_send(sc, frame->mii_stdelim, 2); vr_mii_send(sc, frame->mii_opcode, 2); vr_mii_send(sc, frame->mii_phyaddr, 5); vr_mii_send(sc, frame->mii_regaddr, 5); vr_mii_send(sc, frame->mii_turnaround, 2); vr_mii_send(sc, frame->mii_data, 16); /* Idle bit. */ SIO_SET(VR_MIICMD_CLK); DELAY(1); SIO_CLR(VR_MIICMD_CLK); DELAY(1); /* * Turn off xmit. */ SIO_CLR(VR_MIICMD_DIR); splx(s); return(0); } int vr_miibus_readreg(dev, phy, reg) struct device *dev; int phy, reg; { struct vr_softc *sc = (struct vr_softc *)dev; struct vr_mii_frame frame; bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; vr_mii_readreg(sc, &frame); return(frame.mii_data); } void vr_miibus_writereg(dev, phy, reg, data) struct device *dev; int phy, reg, data; { struct vr_softc *sc = (struct vr_softc *)dev; struct vr_mii_frame frame; bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; frame.mii_data = data; vr_mii_writereg(sc, &frame); return; } void vr_miibus_statchg(dev) struct device *dev; { struct vr_softc *sc = (struct vr_softc *)dev; vr_setcfg(sc, sc->sc_mii.mii_media_active); } /* * Calculate CRC of a multicast group address, return the lower 6 bits. */ u_int8_t vr_calchash(addr) u_int8_t *addr; { u_int32_t crc, carry; int i, j; u_int8_t c; /* Compute CRC for the address value. */ crc = 0xFFFFFFFF; /* initial value */ for (i = 0; i < 6; i++) { c = *(addr + i); for (j = 0; j < 8; j++) { carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); crc <<= 1; c >>= 1; if (carry) crc = (crc ^ 0x04c11db6) | carry; } } /* return the filter bit position */ return((crc >> 26) & 0x0000003F); } /* * Program the 64-bit multicast hash filter. */ void vr_setmulti(sc) struct vr_softc *sc; { struct ifnet *ifp; int h = 0; u_int32_t hashes[2] = { 0, 0 }; struct arpcom *ac = &sc->arpcom; struct ether_multi *enm; struct ether_multistep step; u_int8_t rxfilt; int mcnt = 0; ifp = &sc->arpcom.ac_if; rxfilt = CSR_READ_1(sc, VR_RXCFG); if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { rxfilt |= VR_RXCFG_RX_MULTI; CSR_WRITE_1(sc, VR_RXCFG, rxfilt); CSR_WRITE_4(sc, VR_MAR0, 0xFFFFFFFF); CSR_WRITE_4(sc, VR_MAR1, 0xFFFFFFFF); return; } /* first, zot all the existing hash bits */ CSR_WRITE_4(sc, VR_MAR0, 0); CSR_WRITE_4(sc, VR_MAR1, 0); /* now program new ones */ ETHER_FIRST_MULTI(step, ac, enm); while (enm != NULL) { h = vr_calchash(enm->enm_addrlo); if (h < 32) hashes[0] |= (1 << h); else hashes[1] |= (1 << (h - 32)); mcnt++; ETHER_NEXT_MULTI(step, enm); } if (mcnt) rxfilt |= VR_RXCFG_RX_MULTI; else rxfilt &= ~VR_RXCFG_RX_MULTI; CSR_WRITE_4(sc, VR_MAR0, hashes[0]); CSR_WRITE_4(sc, VR_MAR1, hashes[1]); CSR_WRITE_1(sc, VR_RXCFG, rxfilt); return; } /* * In order to fiddle with the * 'full-duplex' and '100Mbps' bits in the netconfig register, we * first have to put the transmit and/or receive logic in the idle state. */ void vr_setcfg(sc, media) struct vr_softc *sc; int media; { int restart = 0; if (CSR_READ_2(sc, VR_COMMAND) & (VR_CMD_TX_ON|VR_CMD_RX_ON)) { restart = 1; VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_TX_ON|VR_CMD_RX_ON)); } if ((media & IFM_GMASK) == IFM_FDX) VR_SETBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); else VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_FULLDUPLEX); if (restart) VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON|VR_CMD_RX_ON); return; } void vr_reset(sc) struct vr_softc *sc; { register int i; VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RESET); for (i = 0; i < VR_TIMEOUT; i++) { DELAY(10); if (!(CSR_READ_2(sc, VR_COMMAND) & VR_CMD_RESET)) break; } if (i == VR_TIMEOUT) printf("%s: reset never completed!\n", sc->sc_dev.dv_xname); /* Wait a little while for the chip to get its brains in order. */ DELAY(1000); return; } /* * Probe for a VIA Rhine chip. */ int vr_probe(parent, match, aux) struct device *parent; void *match, *aux; { struct pci_attach_args *pa = (struct pci_attach_args *)aux; if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH) { switch (PCI_PRODUCT(pa->pa_id)) { case PCI_PRODUCT_VIATECH_RHINE: case PCI_PRODUCT_VIATECH_RHINEII: case PCI_PRODUCT_VIATECH_RHINEII_2: return (1); } } if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_DELTA && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_DELTA_RHINEII) return (1); if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ADDTRON && PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ADDTRON_RHINEII) return (1); return (0); } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ void vr_attach(parent, self, aux) struct device *parent, *self; void *aux; { int s, i; u_int32_t command; struct vr_softc *sc = (struct vr_softc *)self; struct pci_attach_args *pa = aux; pci_chipset_tag_t pc = pa->pa_pc; pci_intr_handle_t ih; const char *intrstr = NULL; struct ifnet *ifp = &sc->arpcom.ac_if; bus_addr_t iobase; bus_size_t iosize; bus_dma_segment_t seg; bus_dmamap_t dmamap; int rseg; caddr_t kva; s = splimp(); /* * Handle power management nonsense. */ command = pci_conf_read(pa->pa_pc, pa->pa_tag, VR_PCI_CAPID) & 0x000000FF; if (command == 0x01) { command = pci_conf_read(pa->pa_pc, pa->pa_tag, VR_PCI_PWRMGMTCTRL); if (command & VR_PSTATE_MASK) { u_int32_t iobase, membase, irq; /* Save important PCI config data. */ iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, VR_PCI_LOIO); membase = pci_conf_read(pa->pa_pc, pa->pa_tag, VR_PCI_LOMEM); irq = pci_conf_read(pa->pa_pc, pa->pa_tag, VR_PCI_INTLINE); /* Reset the power state. */ command &= 0xFFFFFFFC; pci_conf_write(pa->pa_pc, pa->pa_tag, VR_PCI_PWRMGMTCTRL, command); /* Restore PCI config data. */ pci_conf_write(pa->pa_pc, pa->pa_tag, VR_PCI_LOIO, iobase); pci_conf_write(pa->pa_pc, pa->pa_tag, VR_PCI_LOMEM, membase); pci_conf_write(pa->pa_pc, pa->pa_tag, VR_PCI_INTLINE, irq); } } /* * Map control/status registers. */ command = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG); #ifdef VR_USEIOSPACE if (!(command & PCI_COMMAND_IO_ENABLE)) { printf(": failed to enable I/O ports\n"); goto fail; } if (pci_io_find(pc, pa->pa_tag, VR_PCI_LOIO, &iobase, &iosize)) { printf(": failed to find i/o space\n"); goto fail; } if (bus_space_map(pa->pa_iot, iobase, iosize, 0, &sc->vr_bhandle)) { printf(": failed map i/o space\n"); goto fail; } sc->vr_btag = pa->pa_iot; #else if (!(command & PCI_COMMAND_MEM_ENABLE)) { printf(": failed to enable memory mapping\n"); goto fail; } if (pci_mem_find(pc, pa->pa_tag, VR_PCI_LOMEM, &iobase, &iosize)) { printf(": failed to find memory space\n"); goto fail; } if (bus_space_map(pa->pa_memt, iobase, iosize, 0, &sc->vr_bhandle)) { printf(": failed map memory space\n"); goto fail; } sc->vr_btag = pa->pa_memt; #endif /* Allocate interrupt */ if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin, pa->pa_intrline, &ih)) { printf(": couldn't map interrupt\n"); goto fail; } intrstr = pci_intr_string(pc, ih); sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, vr_intr, sc, self->dv_xname); if (sc->sc_ih == NULL) { printf(": could not establish interrupt"); if (intrstr != NULL) printf(" at %s", intrstr); printf("\n"); goto fail; } printf(": %s", intrstr); /* Reset the adapter. */ vr_reset(sc); /* * Get station address. The way the Rhine chips work, * you're not allowed to directly access the EEPROM once * they've been programmed a special way. Consequently, * we need to read the node address from the PAR0 and PAR1 * registers. */ VR_SETBIT(sc, VR_EECSR, VR_EECSR_LOAD); DELAY(1000); for (i = 0; i < ETHER_ADDR_LEN; i++) sc->arpcom.ac_enaddr[i] = CSR_READ_1(sc, VR_PAR0 + i); /* * A Rhine chip was detected. Inform the world. */ printf(" address %s\n", ether_sprintf(sc->arpcom.ac_enaddr)); sc->sc_dmat = pa->pa_dmat; if (bus_dmamem_alloc(sc->sc_dmat, sizeof(struct vr_list_data), PAGE_SIZE, 0, &seg, 1, &rseg, BUS_DMA_NOWAIT)) { printf("%s: can't alloc list\n", sc->sc_dev.dv_xname); return; } if (bus_dmamem_map(sc->sc_dmat, &seg, rseg, sizeof(struct vr_list_data), &kva, BUS_DMA_NOWAIT)) { printf("%s: can't map dma buffers (%d bytes)\n", sc->sc_dev.dv_xname, sizeof(struct vr_list_data)); bus_dmamem_free(sc->sc_dmat, &seg, rseg); return; } if (bus_dmamap_create(sc->sc_dmat, sizeof(struct vr_list_data), 1, sizeof(struct vr_list_data), 0, BUS_DMA_NOWAIT, &dmamap)) { printf("%s: can't create dma map\n", sc->sc_dev.dv_xname); bus_dmamem_unmap(sc->sc_dmat, kva, sizeof(struct vr_list_data)); bus_dmamem_free(sc->sc_dmat, &seg, rseg); return; } if (bus_dmamap_load(sc->sc_dmat, dmamap, kva, sizeof(struct vr_list_data), NULL, BUS_DMA_NOWAIT)) { printf("%s: can't load dma map\n", sc->sc_dev.dv_xname); bus_dmamap_destroy(sc->sc_dmat, dmamap); bus_dmamem_unmap(sc->sc_dmat, kva, sizeof(struct vr_list_data)); bus_dmamem_free(sc->sc_dmat, &seg, rseg); return; } sc->vr_ldata = (struct vr_list_data *)kva; bzero(sc->vr_ldata, sizeof(struct vr_list_data)); ifp = &sc->arpcom.ac_if; ifp->if_softc = sc; ifp->if_mtu = ETHERMTU; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = vr_ioctl; ifp->if_output = ether_output; ifp->if_start = vr_start; ifp->if_watchdog = vr_watchdog; ifp->if_baudrate = 10000000; bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); /* * Do MII setup. */ sc->sc_mii.mii_ifp = ifp; sc->sc_mii.mii_readreg = vr_miibus_readreg; sc->sc_mii.mii_writereg = vr_miibus_writereg; sc->sc_mii.mii_statchg = vr_miibus_statchg; ifmedia_init(&sc->sc_mii.mii_media, 0, vr_ifmedia_upd, vr_ifmedia_sts); mii_attach(self, &sc->sc_mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0); if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) { ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL); ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE); } else ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO); timeout_set(&sc->sc_to, vr_tick, sc); /* * Call MI attach routines. */ if_attach(ifp); ether_ifattach(ifp); shutdownhook_establish(vr_shutdown, sc); fail: splx(s); return; } /* * Initialize the transmit descriptors. */ int vr_list_tx_init(sc) struct vr_softc *sc; { struct vr_chain_data *cd; struct vr_list_data *ld; int i; cd = &sc->vr_cdata; ld = sc->vr_ldata; for (i = 0; i < VR_TX_LIST_CNT; i++) { cd->vr_tx_chain[i].vr_ptr = &ld->vr_tx_list[i]; if (i == (VR_TX_LIST_CNT - 1)) cd->vr_tx_chain[i].vr_nextdesc = &cd->vr_tx_chain[0]; else cd->vr_tx_chain[i].vr_nextdesc = &cd->vr_tx_chain[i + 1]; } cd->vr_tx_free = &cd->vr_tx_chain[0]; cd->vr_tx_tail = cd->vr_tx_head = NULL; 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. */ int vr_list_rx_init(sc) struct vr_softc *sc; { struct vr_chain_data *cd; struct vr_list_data *ld; int i; cd = &sc->vr_cdata; ld = sc->vr_ldata; for (i = 0; i < VR_RX_LIST_CNT; i++) { cd->vr_rx_chain[i].vr_ptr = (struct vr_desc *)&ld->vr_rx_list[i]; if (vr_newbuf(sc, &cd->vr_rx_chain[i], NULL) == ENOBUFS) return(ENOBUFS); if (i == (VR_RX_LIST_CNT - 1)) { cd->vr_rx_chain[i].vr_nextdesc = &cd->vr_rx_chain[0]; ld->vr_rx_list[i].vr_next = vtophys(&ld->vr_rx_list[0]); } else { cd->vr_rx_chain[i].vr_nextdesc = &cd->vr_rx_chain[i + 1]; ld->vr_rx_list[i].vr_next = vtophys(&ld->vr_rx_list[i + 1]); } } cd->vr_rx_head = &cd->vr_rx_chain[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. */ int vr_newbuf(sc, c, m) struct vr_softc *sc; struct vr_chain_onefrag *c; struct mbuf *m; { struct mbuf *m_new = NULL; if (m == NULL) { MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) return(ENOBUFS); MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { 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->vr_mbuf = m_new; c->vr_ptr->vr_status = VR_RXSTAT; c->vr_ptr->vr_data = vtophys(mtod(m_new, caddr_t)); c->vr_ptr->vr_ctl = VR_RXCTL | VR_RXLEN; return(0); } /* * A frame has been uploaded: pass the resulting mbuf chain up to * the higher level protocols. */ void vr_rxeof(sc) struct vr_softc *sc; { struct ether_header *eh; struct mbuf *m; struct ifnet *ifp; struct vr_chain_onefrag *cur_rx; int total_len = 0; u_int32_t rxstat; ifp = &sc->arpcom.ac_if; while(!((rxstat = sc->vr_cdata.vr_rx_head->vr_ptr->vr_status) & VR_RXSTAT_OWN)) { struct mbuf *m0 = NULL; cur_rx = sc->vr_cdata.vr_rx_head; sc->vr_cdata.vr_rx_head = cur_rx->vr_nextdesc; m = cur_rx->vr_mbuf; /* * 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 & VR_RXSTAT_RXERR) { ifp->if_ierrors++; printf("%s: rx error: ", sc->sc_dev.dv_xname); switch(rxstat & 0x000000FF) { case VR_RXSTAT_CRCERR: printf("crc error\n"); break; case VR_RXSTAT_FRAMEALIGNERR: printf("frame alignment error\n"); break; case VR_RXSTAT_FIFOOFLOW: printf("FIFO overflow\n"); break; case VR_RXSTAT_GIANT: printf("received giant packet\n"); break; case VR_RXSTAT_RUNT: printf("received runt packet\n"); break; case VR_RXSTAT_BUSERR: printf("system bus error\n"); break; case VR_RXSTAT_BUFFERR: printf("rx buffer error\n"); break; default: printf("unknown rx error\n"); break; } vr_newbuf(sc, cur_rx, m); continue; } /* No errors; receive the packet. */ total_len = VR_RXBYTES(cur_rx->vr_ptr->vr_status); /* * XXX The VIA Rhine chip includes the CRC with every * received frame, and there's no way to turn this * behavior off (at least, I can't find anything in * the manual that explains how to do it) so we have * to trim off the CRC manually. */ total_len -= ETHER_CRC_LEN; m0 = m_devget(mtod(m, char *) - ETHER_ALIGN, total_len + ETHER_ALIGN, 0, ifp, NULL); vr_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 NBPFILTER > 0 /* * Handle BPF listeners. Let the BPF user see the packet. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, m); #endif /* Remove header from mbuf and pass it on. */ m_adj(m, sizeof(struct ether_header)); ether_input(ifp, eh, m); } return; } void vr_rxeoc(sc) struct vr_softc *sc; { vr_rxeof(sc); VR_CLRBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_ON); VR_SETBIT16(sc, VR_COMMAND, VR_CMD_RX_GO); return; } /* * A frame was downloaded to the chip. It's safe for us to clean up * the list buffers. */ void vr_txeof(sc) struct vr_softc *sc; { struct vr_chain *cur_tx; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; /* Clear the timeout timer. */ ifp->if_timer = 0; /* Sanity check. */ if (sc->vr_cdata.vr_tx_head == NULL) return; /* * Go through our tx list and free mbufs for those * frames that have been transmitted. */ while(sc->vr_cdata.vr_tx_head->vr_mbuf != NULL) { u_int32_t txstat; cur_tx = sc->vr_cdata.vr_tx_head; txstat = cur_tx->vr_ptr->vr_status; if (txstat & VR_TXSTAT_OWN) break; if (txstat & VR_TXSTAT_ERRSUM) { ifp->if_oerrors++; if (txstat & VR_TXSTAT_DEFER) ifp->if_collisions++; if (txstat & VR_TXSTAT_LATECOLL) ifp->if_collisions++; } ifp->if_collisions +=(txstat & VR_TXSTAT_COLLCNT) >> 3; ifp->if_opackets++; if (cur_tx->vr_mbuf != NULL) { m_freem(cur_tx->vr_mbuf); cur_tx->vr_mbuf = NULL; } if (sc->vr_cdata.vr_tx_head == sc->vr_cdata.vr_tx_tail) { sc->vr_cdata.vr_tx_head = NULL; sc->vr_cdata.vr_tx_tail = NULL; break; } sc->vr_cdata.vr_tx_head = cur_tx->vr_nextdesc; } return; } /* * TX 'end of channel' interrupt handler. */ void vr_txeoc(sc) struct vr_softc *sc; { struct ifnet *ifp; ifp = &sc->arpcom.ac_if; ifp->if_timer = 0; if (sc->vr_cdata.vr_tx_head == NULL) { ifp->if_flags &= ~IFF_OACTIVE; sc->vr_cdata.vr_tx_tail = NULL; } return; } void vr_tick(xsc) void *xsc; { struct vr_softc *sc = xsc; int s; s = splimp(); mii_tick(&sc->sc_mii); timeout_add(&sc->sc_to, hz); splx(s); } int vr_intr(arg) void *arg; { struct vr_softc *sc; struct ifnet *ifp; u_int16_t status; int claimed = 0; sc = arg; ifp = &sc->arpcom.ac_if; /* Supress unwanted interrupts. */ if (!(ifp->if_flags & IFF_UP)) { vr_stop(sc); return 0; } /* Disable interrupts. */ CSR_WRITE_2(sc, VR_IMR, 0x0000); for (;;) { status = CSR_READ_2(sc, VR_ISR); if (status) CSR_WRITE_2(sc, VR_ISR, status); if ((status & VR_INTRS) == 0) break; claimed = 1; if (status & VR_ISR_RX_OK) vr_rxeof(sc); if ((status & VR_ISR_RX_ERR) || (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_NOBUF) || (status & VR_ISR_RX_OFLOW) || (status & VR_ISR_RX_DROPPED)) { vr_rxeof(sc); vr_rxeoc(sc); } if (status & VR_ISR_TX_OK) { vr_txeof(sc); vr_txeoc(sc); } if ((status & VR_ISR_TX_UNDERRUN)||(status & VR_ISR_TX_ABRT)){ ifp->if_oerrors++; vr_txeof(sc); if (sc->vr_cdata.vr_tx_head != NULL) { VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_ON); VR_SETBIT16(sc, VR_COMMAND, VR_CMD_TX_GO); } } if (status & VR_ISR_BUSERR) { vr_reset(sc); vr_init(sc); } } /* Re-enable interrupts. */ CSR_WRITE_2(sc, VR_IMR, VR_INTRS); if (ifp->if_snd.ifq_head != NULL) { vr_start(ifp); } return (claimed); } /* * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data * pointers to the fragment pointers. */ int vr_encap(sc, c, m_head) struct vr_softc *sc; struct vr_chain *c; struct mbuf *m_head; { int frag = 0; struct vr_desc *f = NULL; int total_len; struct mbuf *m; m = m_head; total_len = 0; /* * The VIA Rhine wants packet buffers to be longword * aligned, but very often our mbufs aren't. Rather than * waste time trying to decide when to copy and when not * to copy, just do it all the time. */ if (m != NULL) { struct mbuf *m_new = NULL; MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { return(1); } if (m_head->m_pkthdr.len > MHLEN) { MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { m_freem(m_new); return(1); } } m_copydata(m_head, 0, m_head->m_pkthdr.len, mtod(m_new, caddr_t)); m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len; m_freem(m_head); m_head = m_new; /* * The Rhine chip doesn't auto-pad, so we have to make * sure to pad short frames out to the minimum frame length * ourselves. */ if (m_head->m_len < VR_MIN_FRAMELEN) { m_new->m_pkthdr.len += VR_MIN_FRAMELEN - m_new->m_len; m_new->m_len = m_new->m_pkthdr.len; } f = c->vr_ptr; f->vr_data = vtophys(mtod(m_new, caddr_t)); f->vr_ctl = total_len = m_new->m_len; f->vr_ctl |= VR_TXCTL_TLINK|VR_TXCTL_FIRSTFRAG; f->vr_status = 0; frag = 1; } c->vr_mbuf = m_head; c->vr_ptr->vr_ctl |= VR_TXCTL_LASTFRAG|VR_TXCTL_FINT; c->vr_ptr->vr_next = vtophys(c->vr_nextdesc->vr_ptr); 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. */ void vr_start(ifp) struct ifnet *ifp; { struct vr_softc *sc; struct mbuf *m_head = NULL; struct vr_chain *cur_tx = NULL, *start_tx; sc = ifp->if_softc; if (ifp->if_flags & IFF_OACTIVE) return; /* * Check for an available queue slot. If there are none, * punt. */ if (sc->vr_cdata.vr_tx_free->vr_mbuf != NULL) { ifp->if_flags |= IFF_OACTIVE; return; } start_tx = sc->vr_cdata.vr_tx_free; while(sc->vr_cdata.vr_tx_free->vr_mbuf == NULL) { IF_DEQUEUE(&ifp->if_snd, m_head); if (m_head == NULL) break; /* Pick a descriptor off the free list. */ cur_tx = sc->vr_cdata.vr_tx_free; sc->vr_cdata.vr_tx_free = cur_tx->vr_nextdesc; /* Pack the data into the descriptor. */ if (vr_encap(sc, cur_tx, m_head)) { IF_PREPEND(&ifp->if_snd, m_head); ifp->if_flags |= IFF_OACTIVE; cur_tx = NULL; break; } if (cur_tx != start_tx) VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; #if NBPFILTER > 0 /* * If there's a BPF listener, bounce a copy of this frame * to him. */ if (ifp->if_bpf) bpf_mtap(ifp->if_bpf, cur_tx->vr_mbuf); #endif VR_TXOWN(cur_tx) = VR_TXSTAT_OWN; VR_SETBIT16(sc, VR_COMMAND, /*VR_CMD_TX_ON|*/VR_CMD_TX_GO); } /* * If there are no frames queued, bail. */ if (cur_tx == NULL) return; sc->vr_cdata.vr_tx_tail = cur_tx; if (sc->vr_cdata.vr_tx_head == NULL) sc->vr_cdata.vr_tx_head = start_tx; /* * Set a timeout in case the chip goes out to lunch. */ ifp->if_timer = 5; return; } void vr_init(xsc) void *xsc; { struct vr_softc *sc = xsc; struct ifnet *ifp = &sc->arpcom.ac_if; struct mii_data *mii = &sc->sc_mii; int s; s = splimp(); /* * Cancel pending I/O and free all RX/TX buffers. */ vr_stop(sc); vr_reset(sc); VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_THRESH); VR_SETBIT(sc, VR_RXCFG, VR_RXTHRESH_STORENFWD); VR_CLRBIT(sc, VR_TXCFG, VR_TXCFG_TX_THRESH); VR_SETBIT(sc, VR_TXCFG, VR_TXTHRESH_STORENFWD); /* Init circular RX list. */ if (vr_list_rx_init(sc) == ENOBUFS) { printf("%s: initialization failed: no memory for rx buffers\n", sc->sc_dev.dv_xname); vr_stop(sc); (void)splx(s); return; } /* * Init tx descriptors. */ vr_list_tx_init(sc); /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); else VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_PROMISC); /* Set capture broadcast bit to capture broadcast frames. */ if (ifp->if_flags & IFF_BROADCAST) VR_SETBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); else VR_CLRBIT(sc, VR_RXCFG, VR_RXCFG_RX_BROAD); /* * Program the multicast filter, if necessary. */ vr_setmulti(sc); /* * Load the address of the RX list. */ CSR_WRITE_4(sc, VR_RXADDR, vtophys(sc->vr_cdata.vr_rx_head->vr_ptr)); /* Enable receiver and transmitter. */ CSR_WRITE_2(sc, VR_COMMAND, VR_CMD_TX_NOPOLL|VR_CMD_START| VR_CMD_TX_ON|VR_CMD_RX_ON| VR_CMD_RX_GO); CSR_WRITE_4(sc, VR_TXADDR, vtophys(&sc->vr_ldata->vr_tx_list[0])); /* * Enable interrupts. */ CSR_WRITE_2(sc, VR_ISR, 0xFFFF); CSR_WRITE_2(sc, VR_IMR, VR_INTRS); /* Restore state of BMCR */ mii_mediachg(mii); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; if (!timeout_pending(&sc->sc_to)) timeout_add(&sc->sc_to, hz); (void)splx(s); } /* * Set media options. */ int vr_ifmedia_upd(ifp) struct ifnet *ifp; { struct vr_softc *sc = ifp->if_softc; if (ifp->if_flags & IFF_UP) vr_init(sc); return(0); } /* * Report current media status. */ void vr_ifmedia_sts(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct vr_softc *sc = ifp->if_softc; struct mii_data *mii = &sc->sc_mii; mii_pollstat(mii); ifmr->ifm_active = mii->mii_media_active; ifmr->ifm_status = mii->mii_media_status; } int vr_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { struct vr_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; int s, error = 0; struct ifaddr *ifa = (struct ifaddr *)data; s = splimp(); if ((error = ether_ioctl(ifp, &sc->arpcom, command, data)) > 0) { splx(s); return error; } switch(command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: vr_init(sc); arp_ifinit(&sc->arpcom, ifa); break; #endif /* INET */ default: vr_init(sc); break; } break; case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { vr_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) vr_stop(sc); } error = 0; break; case SIOCADDMULTI: case SIOCDELMULTI: error = (command == SIOCADDMULTI) ? ether_addmulti(ifr, &sc->arpcom) : ether_delmulti(ifr, &sc->arpcom); if (error == ENETRESET) { /* * Multicast list has changed; set the hardware * filter accordingly. */ vr_setmulti(sc); error = 0; } break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, command); break; default: error = EINVAL; break; } (void)splx(s); return(error); } void vr_watchdog(ifp) struct ifnet *ifp; { struct vr_softc *sc; sc = ifp->if_softc; ifp->if_oerrors++; printf("%s: watchdog timeout\n", sc->sc_dev.dv_xname); vr_stop(sc); vr_reset(sc); vr_init(sc); if (ifp->if_snd.ifq_head != NULL) vr_start(ifp); return; } /* * Stop the adapter and free any mbufs allocated to the * RX and TX lists. */ void vr_stop(sc) struct vr_softc *sc; { register int i; struct ifnet *ifp; ifp = &sc->arpcom.ac_if; ifp->if_timer = 0; if (timeout_pending(&sc->sc_to)) timeout_del(&sc->sc_to); VR_SETBIT16(sc, VR_COMMAND, VR_CMD_STOP); VR_CLRBIT16(sc, VR_COMMAND, (VR_CMD_RX_ON|VR_CMD_TX_ON)); CSR_WRITE_2(sc, VR_IMR, 0x0000); CSR_WRITE_4(sc, VR_TXADDR, 0x00000000); CSR_WRITE_4(sc, VR_RXADDR, 0x00000000); /* * Free data in the RX lists. */ for (i = 0; i < VR_RX_LIST_CNT; i++) { if (sc->vr_cdata.vr_rx_chain[i].vr_mbuf != NULL) { m_freem(sc->vr_cdata.vr_rx_chain[i].vr_mbuf); sc->vr_cdata.vr_rx_chain[i].vr_mbuf = NULL; } } bzero((char *)&sc->vr_ldata->vr_rx_list, sizeof(sc->vr_ldata->vr_rx_list)); /* * Free the TX list buffers. */ for (i = 0; i < VR_TX_LIST_CNT; i++) { if (sc->vr_cdata.vr_tx_chain[i].vr_mbuf != NULL) { m_freem(sc->vr_cdata.vr_tx_chain[i].vr_mbuf); sc->vr_cdata.vr_tx_chain[i].vr_mbuf = NULL; } } bzero((char *)&sc->vr_ldata->vr_tx_list, sizeof(sc->vr_ldata->vr_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. */ void vr_shutdown(arg) void *arg; { struct vr_softc *sc = (struct vr_softc *)arg; vr_stop(sc); }