/* $NetBSD: rtl81x9.c,v 1.2 2000/04/24 15:25:00 tsutsui 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 Id: if_rl.c,v 1.17 1999/06/19 20:17:37 wpaul Exp */ /* * RealTek 8129/8139 PCI NIC driver * * Supports several extremely cheap PCI 10/100 adapters based on * the RealTek chipset. Datasheets can be obtained from * www.realtek.com.tw. * * Written by Bill Paul * Electrical Engineering Department * Columbia University, New York City */ /* * The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is * probably the worst PCI ethernet controller ever made, with the possible * exception of the FEAST chip made by SMC. The 8139 supports bus-master * DMA, but it has a terrible interface that nullifies any performance * gains that bus-master DMA usually offers. * * For transmission, the chip offers a series of four TX descriptor * registers. Each transmit frame must be in a contiguous buffer, aligned * on a longword (32-bit) boundary. This means we almost always have to * do mbuf copies in order to transmit a frame, except in the unlikely * case where a) the packet fits into a single mbuf, and b) the packet * is 32-bit aligned within the mbuf's data area. The presence of only * four descriptor registers means that we can never have more than four * packets queued for transmission at any one time. * * Reception is not much better. The driver has to allocate a single large * buffer area (up to 64K in size) into which the chip will DMA received * frames. Because we don't know where within this region received packets * will begin or end, we have no choice but to copy data from the buffer * area into mbufs in order to pass the packets up to the higher protocol * levels. * * It's impossible given this rotten design to really achieve decent * performance at 100Mbps, unless you happen to have a 400Mhz PII or * some equally overmuscled CPU to drive it. * * On the bright side, the 8139 does have a built-in PHY, although * rather than using an MDIO serial interface like most other NICs, the * PHY registers are directly accessible through the 8139's register * space. The 8139 supports autonegotiation, as well as a 64-bit multicast * filter. * * The 8129 chip is an older version of the 8139 that uses an external PHY * chip. The 8129 has a serial MDIO interface for accessing the MII where * the 8139 lets you directly access the on-board PHY registers. We need * to select which interface to use depending on the chip type. */ #include "opt_inet.h" #include "opt_ns.h" #include "bpfilter.h" #include "rnd.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #endif #ifdef NS #include #include #endif #if NBPFILTER > 0 #include #endif #if NRND > 0 #include #endif #include #include #include /* * Default to using PIO access for this driver. On SMP systems, * there appear to be problems with memory mapped mode: it looks like * doing too many memory mapped access back to back in rapid succession * can hang the bus. I'm inclined to blame this on crummy design/construction * on the part of RealTek. Memory mapped mode does appear to work on * uniprocessor systems though. */ #include #if defined DEBUG #define STATIC #else #define STATIC static #endif STATIC int rl_encap __P((struct rl_softc *, struct mbuf * )); STATIC void rl_rxeof __P((struct rl_softc *)); STATIC void rl_txeof __P((struct rl_softc *)); STATIC void rl_start __P((struct ifnet *)); STATIC int rl_ioctl __P((struct ifnet *, u_long, caddr_t)); STATIC void rl_init __P((void *)); STATIC void rl_stop __P((struct rl_softc *)); STATIC void rl_watchdog __P((struct ifnet *)); STATIC void rl_shutdown __P((void *)); STATIC int rl_ifmedia_upd __P((struct ifnet *)); STATIC void rl_ifmedia_sts __P((struct ifnet *, struct ifmediareq *)); STATIC void rl_eeprom_putbyte __P((struct rl_softc *, int)); STATIC void rl_eeprom_getword __P((struct rl_softc *, int, u_int16_t *)); STATIC void rl_mii_sync __P((struct rl_softc *)); STATIC void rl_mii_send __P((struct rl_softc *, u_int32_t, int)); STATIC int rl_mii_readreg __P((struct rl_softc *, struct rl_mii_frame *)); STATIC int rl_mii_writereg __P((struct rl_softc *, struct rl_mii_frame *)); STATIC int rl_phy_readreg __P((struct device *, int, int)); STATIC void rl_phy_writereg __P((struct device *, int, int, int)); STATIC void rl_phy_statchg __P((struct device *)); STATIC void rl_tick __P((void *)); STATIC u_int8_t rl_calchash __P((caddr_t)); STATIC void rl_setmulti __P((struct rl_softc *)); STATIC int rl_list_tx_init __P((struct rl_softc *)); STATIC int rl_ether_ioctl __P((struct ifnet *, u_long, caddr_t)); STATIC int rl_allocsndbuf __P((struct rl_softc *, int)); #define EE_SET(x) \ CSR_WRITE_1(sc, RL_EECMD, \ CSR_READ_1(sc, RL_EECMD) | x) #define EE_CLR(x) \ CSR_WRITE_1(sc, RL_EECMD, \ CSR_READ_1(sc, RL_EECMD) & ~x) /* * Send a read command and address to the EEPROM, check for ACK. */ STATIC void rl_eeprom_putbyte(sc, addr) struct rl_softc *sc; int addr; { int d, i; d = addr | RL_EECMD_READ; /* * Feed in each bit and stobe the clock. */ for (i = 0x400; i; i >>= 1) { if (d & i) { EE_SET(RL_EE_DATAIN); } else { EE_CLR(RL_EE_DATAIN); } DELAY(100); EE_SET(RL_EE_CLK); DELAY(150); EE_CLR(RL_EE_CLK); DELAY(100); } return; } /* * Read a word of data stored in the EEPROM at address 'addr.' */ STATIC void rl_eeprom_getword(sc, addr, dest) struct rl_softc *sc; int addr; u_int16_t *dest; { int i; u_int16_t word = 0; /* Enter EEPROM access mode. */ CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); /* * Send address of word we want to read. */ rl_eeprom_putbyte(sc, addr); CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_PROGRAM|RL_EE_SEL); /* * Start reading bits from EEPROM. */ for (i = 0x8000; i; i >>= 1) { EE_SET(RL_EE_CLK); DELAY(100); if (CSR_READ_1(sc, RL_EECMD) & RL_EE_DATAOUT) word |= i; EE_CLR(RL_EE_CLK); DELAY(100); } /* Turn off EEPROM access mode. */ CSR_WRITE_1(sc, RL_EECMD, RL_EEMODE_OFF); *dest = word; return; } /* * Read a sequence of words from the EEPROM. */ void rl_read_eeprom(sc, dest, off, cnt, swap) struct rl_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++) { rl_eeprom_getword(sc, off + i, &word); ptr = (u_int16_t *)(dest + (i * 2)); if (swap) *ptr = ntohs(word); else *ptr = word; } return; } /* * MII access routines are provided for the 8129, which * doesn't have a built-in PHY. For the 8139, we fake things * up by diverting rl_phy_readreg()/rl_phy_writereg() to the * direct access PHY registers. */ #define MII_SET(x) \ CSR_WRITE_1(sc, RL_MII, \ CSR_READ_1(sc, RL_MII) | x) #define MII_CLR(x) \ CSR_WRITE_1(sc, RL_MII, \ CSR_READ_1(sc, RL_MII) & ~x) /* * Sync the PHYs by setting data bit and strobing the clock 32 times. */ STATIC void rl_mii_sync(sc) struct rl_softc *sc; { int i; MII_SET(RL_MII_DIR|RL_MII_DATAOUT); for (i = 0; i < 32; i++) { MII_SET(RL_MII_CLK); DELAY(1); MII_CLR(RL_MII_CLK); DELAY(1); } return; } /* * Clock a series of bits through the MII. */ STATIC void rl_mii_send(sc, bits, cnt) struct rl_softc *sc; u_int32_t bits; int cnt; { int i; MII_CLR(RL_MII_CLK); for (i = (0x1 << (cnt - 1)); i; i >>= 1) { if (bits & i) { MII_SET(RL_MII_DATAOUT); } else { MII_CLR(RL_MII_DATAOUT); } DELAY(1); MII_CLR(RL_MII_CLK); DELAY(1); MII_SET(RL_MII_CLK); } } /* * Read an PHY register through the MII. */ STATIC int rl_mii_readreg(sc, frame) struct rl_softc *sc; struct rl_mii_frame *frame; { int i, ack, s; s = splimp(); /* * Set up frame for RX. */ frame->mii_stdelim = RL_MII_STARTDELIM; frame->mii_opcode = RL_MII_READOP; frame->mii_turnaround = 0; frame->mii_data = 0; CSR_WRITE_2(sc, RL_MII, 0); /* * Turn on data xmit. */ MII_SET(RL_MII_DIR); rl_mii_sync(sc); /* * Send command/address info. */ rl_mii_send(sc, frame->mii_stdelim, 2); rl_mii_send(sc, frame->mii_opcode, 2); rl_mii_send(sc, frame->mii_phyaddr, 5); rl_mii_send(sc, frame->mii_regaddr, 5); /* Idle bit */ MII_CLR((RL_MII_CLK|RL_MII_DATAOUT)); DELAY(1); MII_SET(RL_MII_CLK); DELAY(1); /* Turn off xmit. */ MII_CLR(RL_MII_DIR); /* Check for ack */ MII_CLR(RL_MII_CLK); DELAY(1); MII_SET(RL_MII_CLK); DELAY(1); ack = CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN; /* * 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++) { MII_CLR(RL_MII_CLK); DELAY(1); MII_SET(RL_MII_CLK); DELAY(1); } goto fail; } for (i = 0x8000; i; i >>= 1) { MII_CLR(RL_MII_CLK); DELAY(1); if (!ack) { if (CSR_READ_2(sc, RL_MII) & RL_MII_DATAIN) frame->mii_data |= i; DELAY(1); } MII_SET(RL_MII_CLK); DELAY(1); } fail: MII_CLR(RL_MII_CLK); DELAY(1); MII_SET(RL_MII_CLK); DELAY(1); splx(s); if (ack) return(1); return(0); } /* * Write to a PHY register through the MII. */ STATIC int rl_mii_writereg(sc, frame) struct rl_softc *sc; struct rl_mii_frame *frame; { int s; s = splimp(); /* * Set up frame for TX. */ frame->mii_stdelim = RL_MII_STARTDELIM; frame->mii_opcode = RL_MII_WRITEOP; frame->mii_turnaround = RL_MII_TURNAROUND; /* * Turn on data output. */ MII_SET(RL_MII_DIR); rl_mii_sync(sc); rl_mii_send(sc, frame->mii_stdelim, 2); rl_mii_send(sc, frame->mii_opcode, 2); rl_mii_send(sc, frame->mii_phyaddr, 5); rl_mii_send(sc, frame->mii_regaddr, 5); rl_mii_send(sc, frame->mii_turnaround, 2); rl_mii_send(sc, frame->mii_data, 16); /* Idle bit. */ MII_SET(RL_MII_CLK); DELAY(1); MII_CLR(RL_MII_CLK); DELAY(1); /* * Turn off xmit. */ MII_CLR(RL_MII_DIR); splx(s); return(0); } STATIC int rl_phy_readreg(self, phy, reg) struct device *self; int phy, reg; { struct rl_softc *sc = (void *)self; struct rl_mii_frame frame; u_int16_t rval = 0; u_int16_t rl8139_reg = 0; if (sc->rl_type == RL_8139) { if (phy != 7) return (0); switch(reg) { case MII_BMCR: rl8139_reg = RL_BMCR; break; case MII_BMSR: rl8139_reg = RL_BMSR; break; case MII_ANAR: rl8139_reg = RL_ANAR; break; case MII_ANLPAR: rl8139_reg = RL_LPAR; break; default: #if 0 printf("%s: bad phy register\n", sc->sc_dev.dv_xname); #endif return(0); } rval = CSR_READ_2(sc, rl8139_reg); return(rval); } bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; rl_mii_readreg(sc, &frame); return(frame.mii_data); } STATIC void rl_phy_writereg(self, phy, reg, data) struct device *self; int phy, reg; int data; { struct rl_softc *sc = (void *)self; struct rl_mii_frame frame; u_int16_t rl8139_reg = 0; if (sc->rl_type == RL_8139) { if (phy != 7) return; switch(reg) { case MII_BMCR: rl8139_reg = RL_BMCR; break; case MII_BMSR: rl8139_reg = RL_BMSR; break; case MII_ANAR: rl8139_reg = RL_ANAR; break; case MII_ANLPAR: rl8139_reg = RL_LPAR; break; default: #if 0 printf("%s: bad phy register\n", sc->sc_dev.dv_xname); #endif return; } CSR_WRITE_2(sc, rl8139_reg, data); return; } bzero((char *)&frame, sizeof(frame)); frame.mii_phyaddr = phy; frame.mii_regaddr = reg; frame.mii_data = data; rl_mii_writereg(sc, &frame); return; } STATIC void rl_phy_statchg(v) struct device *v; { /* Nothing to do. */ } /* * Calculate CRC of a multicast group address, return the upper 6 bits. */ STATIC u_int8_t rl_calchash(addr) caddr_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); } /* * Program the 64-bit multicast hash filter. */ STATIC void rl_setmulti(sc) struct rl_softc *sc; { struct ifnet *ifp; int h = 0; u_int32_t hashes[2] = { 0, 0 }; u_int32_t rxfilt; int mcnt = 0; struct ether_multi *enm; struct ether_multistep step; ifp = &sc->ethercom.ec_if; rxfilt = CSR_READ_4(sc, RL_RXCFG); if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) { rxfilt |= RL_RXCFG_RX_MULTI; CSR_WRITE_4(sc, RL_RXCFG, rxfilt); CSR_WRITE_4(sc, RL_MAR0, 0xFFFFFFFF); CSR_WRITE_4(sc, RL_MAR4, 0xFFFFFFFF); return; } /* first, zot all the existing hash bits */ CSR_WRITE_4(sc, RL_MAR0, 0); CSR_WRITE_4(sc, RL_MAR4, 0); /* now program new ones */ ETHER_FIRST_MULTI(step, &sc->ethercom, enm); while (enm != NULL) { h = rl_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 |= RL_RXCFG_RX_MULTI; else rxfilt &= ~RL_RXCFG_RX_MULTI; CSR_WRITE_4(sc, RL_RXCFG, rxfilt); CSR_WRITE_4(sc, RL_MAR0, hashes[0]); CSR_WRITE_4(sc, RL_MAR4, hashes[1]); return; } void rl_reset(sc) struct rl_softc *sc; { int i; CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_RESET); for (i = 0; i < RL_TIMEOUT; i++) { DELAY(10); if (!(CSR_READ_1(sc, RL_COMMAND) & RL_CMD_RESET)) break; } if (i == RL_TIMEOUT) printf("%s: reset never completed!\n", sc->sc_dev.dv_xname); return; } /* * Attach the interface. Allocate softc structures, do ifmedia * setup and ethernet/BPF attach. */ void rl_attach(sc, eaddr) struct rl_softc *sc; const u_int8_t *eaddr; { struct ifnet *ifp; bus_dma_segment_t dmaseg; int error,dmanseg; int i; callout_init(&sc->rl_tick_ch); if ((error = bus_dmamem_alloc(sc->sc_dmat, RL_RXBUFLEN + 32, NBPG, 0, &dmaseg, 1, &dmanseg, BUS_DMA_NOWAIT)) != 0) { printf("%s: can't allocate recv buffer, error = %d\n", sc->sc_dev.dv_xname, error); goto fail; } if ((error = bus_dmamem_map(sc->sc_dmat, &dmaseg, dmanseg, RL_RXBUFLEN + 32, (caddr_t *)&sc->rl_cdata.rl_rx_buf, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) { printf("%s: can't map recv buffer, error = %d\n", sc->sc_dev.dv_xname, error); goto fail; } /* Leave a few bytes before the start of the RX ring buffer. */ sc->rl_cdata.rl_rx_buf_ptr = sc->rl_cdata.rl_rx_buf; sc->rl_cdata.rl_rx_buf += sizeof(u_int64_t); if ((error = bus_dmamap_create(sc->sc_dmat, RL_RXBUFLEN + 32 - sizeof(u_int64_t), 1, RL_RXBUFLEN + 32 - sizeof(u_int64_t), 0, BUS_DMA_NOWAIT, &sc->recv_dmamap)) != 0) { printf("%s: can't create recv buffer DMA map, error = %d\n", sc->sc_dev.dv_xname, error); goto fail; } if ((error = bus_dmamap_load(sc->sc_dmat, sc->recv_dmamap, sc->rl_cdata.rl_rx_buf, RL_RXBUFLEN + 32 - sizeof(u_int64_t), NULL, BUS_DMA_NOWAIT)) != 0) { printf("%s: can't load recv buffer DMA map, error = %d\n", sc->sc_dev.dv_xname, error); goto fail; } for (i = 0; i < RL_TX_LIST_CNT; i++) if (rl_allocsndbuf(sc, i)) goto fail; ifp = &sc->ethercom.ec_if; ifp->if_softc = sc; bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); ifp->if_mtu = ETHERMTU; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_ioctl = rl_ioctl; #if 0 ifp->if_output = ether_output; #endif ifp->if_start = rl_start; ifp->if_watchdog = rl_watchdog; ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; /* * Do ifmedia setup. */ sc->mii.mii_ifp = ifp; sc->mii.mii_readreg = rl_phy_readreg; sc->mii.mii_writereg = rl_phy_writereg; sc->mii.mii_statchg = rl_phy_statchg; ifmedia_init(&sc->mii.mii_media, 0, rl_ifmedia_upd, rl_ifmedia_sts); mii_attach(&sc->sc_dev, &sc->mii, 0xffffffff, MII_PHY_ANY, MII_OFFSET_ANY, 0); /* Choose a default media. */ if (LIST_FIRST(&sc->mii.mii_phys) == NULL) { ifmedia_add(&sc->mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL); ifmedia_set(&sc->mii.mii_media, IFM_ETHER|IFM_NONE); } else { ifmedia_set(&sc->mii.mii_media, IFM_ETHER|IFM_AUTO); } /* * Call MI attach routines. */ if_attach(ifp); ether_ifattach(ifp, eaddr); #if NBPFILTER > 0 bpfattach(&sc->ethercom.ec_if.if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif shutdownhook_establish(rl_shutdown, sc); fail: return; } /* * Initialize the transmit descriptors. */ STATIC int rl_list_tx_init(sc) struct rl_softc *sc; { struct rl_chain_data *cd; int i; cd = &sc->rl_cdata; for (i = 0; i < RL_TX_LIST_CNT; i++) { cd->rl_tx_chain[i] = NULL; CSR_WRITE_4(sc, RL_TXADDR0 + (i * sizeof(u_int32_t)), 0x0000000); } sc->rl_cdata.cur_tx = 0; sc->rl_cdata.last_tx = 0; return(0); } /* * A frame has been uploaded: pass the resulting mbuf chain up to * the higher level protocols. * * You know there's something wrong with a PCI bus-master chip design * when you have to use m_devget(). * * The receive operation is badly documented in the datasheet, so I'll * attempt to document it here. The driver provides a buffer area and * places its base address in the RX buffer start address register. * The chip then begins copying frames into the RX buffer. Each frame * is preceeded by a 32-bit RX status word which specifies the length * of the frame and certain other status bits. Each frame (starting with * the status word) is also 32-bit aligned. The frame length is in the * first 16 bits of the status word; the lower 15 bits correspond with * the 'rx status register' mentioned in the datasheet. * * Note: to make the Alpha happy, the frame payload needs to be aligned * on a 32-bit boundary. To achieve this, we cheat a bit by copying from * the ring buffer starting at an address two bytes before the actual * data location. We can then shave off the first two bytes using m_adj(). * The reason we do this is because m_devget() doesn't let us specify an * offset into the mbuf storage space, so we have to artificially create * one. The ring is allocated in such a way that there are a few unused * bytes of space preceecing it so that it will be safe for us to do the * 2-byte backstep even if reading from the ring at offset 0. */ STATIC void rl_rxeof(sc) struct rl_softc *sc; { struct ether_header *eh; struct mbuf *m; struct ifnet *ifp; int total_len = 0; u_int32_t rxstat; caddr_t rxbufpos; int wrap = 0; u_int16_t cur_rx; u_int16_t limit; u_int16_t rx_bytes = 0, max_bytes; ifp = &sc->ethercom.ec_if; cur_rx = (CSR_READ_2(sc, RL_CURRXADDR) + 16) % RL_RXBUFLEN; /* Do not try to read past this point. */ limit = CSR_READ_2(sc, RL_CURRXBUF) % RL_RXBUFLEN; if (limit < cur_rx) max_bytes = (RL_RXBUFLEN - cur_rx) + limit; else max_bytes = limit - cur_rx; while((CSR_READ_1(sc, RL_COMMAND) & RL_CMD_EMPTY_RXBUF) == 0) { rxbufpos = sc->rl_cdata.rl_rx_buf + cur_rx; rxstat = *(u_int32_t *)rxbufpos; /* * Here's a totally undocumented fact for you. When the * RealTek chip is in the process of copying a packet into * RAM for you, the length will be 0xfff0. If you spot a * packet header with this value, you need to stop. The * datasheet makes absolutely no mention of this and * RealTek should be shot for this. */ if ((u_int16_t)(rxstat >> 16) == RL_RXSTAT_UNFINISHED) break; if (!(rxstat & RL_RXSTAT_RXOK)) { ifp->if_ierrors++; /* * submitted by:[netbsd-pcmcia:00484] * Takahiro Kambe * obtain from: * FreeBSD if_rl.c rev 1.24->1.25 * */ #if 0 if (rxstat & (RL_RXSTAT_BADSYM|RL_RXSTAT_RUNT| RL_RXSTAT_GIANT|RL_RXSTAT_CRCERR| RL_RXSTAT_ALIGNERR)) { if (rxstat & (RL_RXSTAT_BADSYM|RL_RXSTAT_RUNT| RL_RXSTAT_GIANT|RL_RXSTAT_CRCERR| RL_RXSTAT_ALIGNERR)) { CSR_WRITE_2(sc, RL_COMMAND, RL_CMD_TX_ENB); CSR_WRITE_2(sc, RL_COMMAND, RL_CMD_TX_ENB| RL_CMD_RX_ENB); CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); CSR_WRITE_4(sc, RL_RXADDR, sc->recv_dmamap->dm_segs[0].ds_addr); CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16); cur_rx = 0; } break; #else rl_init(sc); return; #endif } /* No errors; receive the packet. */ total_len = rxstat >> 16; rx_bytes += total_len + 4; /* * XXX The RealTek 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; /* * Avoid trying to read more bytes than we know * the chip has prepared for us. */ if (rx_bytes > max_bytes) break; rxbufpos = sc->rl_cdata.rl_rx_buf + ((cur_rx + sizeof(u_int32_t)) % RL_RXBUFLEN); if (rxbufpos == (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN)) rxbufpos = sc->rl_cdata.rl_rx_buf; wrap = (sc->rl_cdata.rl_rx_buf + RL_RXBUFLEN) - rxbufpos; if (total_len > wrap) { m = m_devget(rxbufpos - RL_ETHER_ALIGN, wrap + RL_ETHER_ALIGN, 0, ifp, NULL); if (m == NULL) { ifp->if_ierrors++; printf("%s: out of mbufs, tried to " "copy %d bytes\n", sc->sc_dev.dv_xname, wrap); } else { m_adj(m, RL_ETHER_ALIGN); m_copyback(m, wrap, total_len - wrap, sc->rl_cdata.rl_rx_buf); } cur_rx = (total_len - wrap + ETHER_CRC_LEN); } else { m = m_devget(rxbufpos - RL_ETHER_ALIGN, total_len + RL_ETHER_ALIGN, 0, ifp, NULL); if (m == NULL) { ifp->if_ierrors++; printf("%s: out of mbufs, tried to " "copy %d bytes\n", sc->sc_dev.dv_xname, total_len); } else m_adj(m, RL_ETHER_ALIGN); cur_rx += total_len + 4 + ETHER_CRC_LEN; } /* * Round up to 32-bit boundary. */ cur_rx = (cur_rx + 3) & ~3; CSR_WRITE_2(sc, RL_CURRXADDR, cur_rx - 16); if (m == NULL) continue; eh = mtod(m, struct ether_header *); ifp->if_ipackets++; #if NBPFILTER > 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->if_bpf, m); if (ifp->if_flags & IFF_PROMISC && (bcmp(eh->ether_dhost, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN) && (eh->ether_dhost[0] & 1) == 0)) { m_freem(m); continue; } } #endif /* pass it on. */ (*ifp->if_input)(ifp, m); } return; } /* * A frame was downloaded to the chip. It's safe for us to clean up * the list buffers. */ STATIC void rl_txeof(sc) struct rl_softc *sc; { struct ifnet *ifp; u_int32_t txstat; ifp = &sc->ethercom.ec_if; /* Clear the timeout timer. */ ifp->if_timer = 0; /* * Go through our tx list and free mbufs for those * frames that have been uploaded. */ do { txstat = CSR_READ_4(sc, RL_LAST_TXSTAT(sc)); if (!(txstat & (RL_TXSTAT_TX_OK| RL_TXSTAT_TX_UNDERRUN|RL_TXSTAT_TXABRT))) break; ifp->if_collisions += (txstat & RL_TXSTAT_COLLCNT) >> 24; if (RL_LAST_TXMBUF(sc) != NULL) { RL_LAST_TXMBUF(sc) = NULL; } if (txstat & RL_TXSTAT_TX_OK) ifp->if_opackets++; else { ifp->if_oerrors++; if ((txstat & RL_TXSTAT_TXABRT) || (txstat & RL_TXSTAT_OUTOFWIN)) CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); } RL_INC(sc->rl_cdata.last_tx); ifp->if_flags &= ~IFF_OACTIVE; } while (sc->rl_cdata.last_tx != sc->rl_cdata.cur_tx); return; } int rl_intr(arg) void *arg; { struct rl_softc *sc; struct ifnet *ifp; u_int16_t status; int handled = 0; sc = arg; ifp = &sc->ethercom.ec_if; /* Disable interrupts. */ CSR_WRITE_2(sc, RL_IMR, 0x0000); for (;;) { status = CSR_READ_2(sc, RL_ISR); if (status) CSR_WRITE_2(sc, RL_ISR, status); handled = 1; if ((status & RL_INTRS) == 0) break; if (status & RL_ISR_RX_OK) rl_rxeof(sc); if (status & RL_ISR_RX_ERR) rl_rxeof(sc); if ((status & RL_ISR_TX_OK) || (status & RL_ISR_TX_ERR)) rl_txeof(sc); if (status & RL_ISR_SYSTEM_ERR) { rl_reset(sc); rl_init(sc); } } /* Re-enable interrupts. */ CSR_WRITE_2(sc, RL_IMR, RL_INTRS); if (ifp->if_snd.ifq_head != NULL) { rl_start(ifp); } return (handled); } STATIC int rl_allocsndbuf(sc, idx) struct rl_softc *sc; int idx; { struct mbuf *m_new = NULL; int error; MGETHDR(m_new, M_DONTWAIT, MT_DATA); if (m_new == NULL) { printf("%s: no memory for tx list", sc->sc_dev.dv_xname); return(1); } MCLGET(m_new, M_DONTWAIT); if (!(m_new->m_flags & M_EXT)) { m_freem(m_new); printf("%s: no memory for tx list", sc->sc_dev.dv_xname); return(1); } if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, MCLBYTES, 0, BUS_DMA_NOWAIT, &sc->snd_dmamap[idx])) != 0) { printf("%s: can't create snd buffer DMA map, error = %d\n", sc->sc_dev.dv_xname, error); return (1); } if ((error = bus_dmamap_load(sc->sc_dmat, sc->snd_dmamap[idx], mtod(m_new, caddr_t), MCLBYTES, NULL, BUS_DMA_NOWAIT)) != 0) { printf("%s: can't load snd buffer DMA map, error = %d\n", sc->sc_dev.dv_xname, error); return (1); } sc->sndbuf[idx] = m_new; return (0); } /* * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data * pointers to the fragment pointers. */ STATIC int rl_encap(sc, m_head) struct rl_softc *sc; struct mbuf *m_head; { struct mbuf *m_new; /* * The RealTek is brain damaged and wants longword-aligned * TX buffers, plus we can only have one fragment buffer * per packet. We have to copy pretty much all the time. */ m_new = sc->sndbuf[sc->rl_cdata.cur_tx]; 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; /* Pad frames to at least 60 bytes. */ if (m_head->m_pkthdr.len < RL_MIN_FRAMELEN) { m_head->m_pkthdr.len += (RL_MIN_FRAMELEN - m_head->m_pkthdr.len); m_head->m_len = m_head->m_pkthdr.len; } RL_CUR_TXMBUF(sc) = m_head; return(0); } /* * Main transmit routine. */ STATIC void rl_start(ifp) struct ifnet *ifp; { struct rl_softc *sc; struct mbuf *m_head = NULL; sc = ifp->if_softc; while(RL_CUR_TXMBUF(sc) == NULL) { IF_DEQUEUE(&ifp->if_snd, m_head); if (m_head == NULL) break; rl_encap(sc, m_head); #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, RL_CUR_TXMBUF(sc)); #endif /* * Transmit the frame. */ CSR_WRITE_4(sc, RL_CUR_TXADDR(sc), sc->snd_dmamap[sc->rl_cdata.cur_tx]->dm_segs[0].ds_addr); CSR_WRITE_4(sc, RL_CUR_TXSTAT(sc), RL_TX_EARLYTHRESH | RL_CUR_TXMBUF(sc)->m_pkthdr.len); RL_INC(sc->rl_cdata.cur_tx); } /* * We broke out of the loop because all our TX slots are * full. Mark the NIC as busy until it drains some of the * packets from the queue. */ if (RL_CUR_TXMBUF(sc) != NULL) ifp->if_flags |= IFF_OACTIVE; /* * Set a timeout in case the chip goes out to lunch. */ ifp->if_timer = 5; return; } STATIC void rl_init(xsc) void *xsc; { struct rl_softc *sc = xsc; struct ifnet *ifp = &sc->ethercom.ec_if; int s, i; u_int32_t rxcfg = 0; u_int16_t phy_bmcr = 0; s = splimp(); /* * XXX Hack for the 8139: the built-in autoneg logic's state * gets reset by rl_init() when we don't want it to. Try * to preserve it. */ if (sc->rl_type == RL_8139) phy_bmcr = rl_phy_readreg((struct device *)sc, 7, MII_BMCR); /* * Cancel pending I/O and free all RX/TX buffers. */ rl_stop(sc); /* Init our MAC address */ for (i = 0; i < ETHER_ADDR_LEN; i++) { CSR_WRITE_1(sc, RL_IDR0 + i, LLADDR(ifp->if_sadl)[i]); } /* Init the RX buffer pointer register. */ CSR_WRITE_4(sc, RL_RXADDR, sc->recv_dmamap->dm_segs[0].ds_addr); /* Init TX descriptors. */ rl_list_tx_init(sc); /* * Enable transmit and receive. */ CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); /* * Set the initial TX and RX configuration. */ CSR_WRITE_4(sc, RL_TXCFG, RL_TXCFG_CONFIG); CSR_WRITE_4(sc, RL_RXCFG, RL_RXCFG_CONFIG); /* Set the individual bit to receive frames for this host only. */ rxcfg = CSR_READ_4(sc, RL_RXCFG); rxcfg |= RL_RXCFG_RX_INDIV; /* If we want promiscuous mode, set the allframes bit. */ if (ifp->if_flags & IFF_PROMISC) { rxcfg |= RL_RXCFG_RX_ALLPHYS; CSR_WRITE_4(sc, RL_RXCFG, rxcfg); } else { rxcfg &= ~RL_RXCFG_RX_ALLPHYS; CSR_WRITE_4(sc, RL_RXCFG, rxcfg); } /* * Set capture broadcast bit to capture broadcast frames. */ if (ifp->if_flags & IFF_BROADCAST) { rxcfg |= RL_RXCFG_RX_BROAD; CSR_WRITE_4(sc, RL_RXCFG, rxcfg); } else { rxcfg &= ~RL_RXCFG_RX_BROAD; CSR_WRITE_4(sc, RL_RXCFG, rxcfg); } /* * Program the multicast filter, if necessary. */ rl_setmulti(sc); /* * Enable interrupts. */ CSR_WRITE_2(sc, RL_IMR, RL_INTRS); /* Start RX/TX process. */ CSR_WRITE_4(sc, RL_MISSEDPKT, 0); /* Enable receiver and transmitter. */ CSR_WRITE_1(sc, RL_COMMAND, RL_CMD_TX_ENB|RL_CMD_RX_ENB); /* Restore state of BMCR */ if (sc->rl_type == RL_8139) rl_phy_writereg((struct device *)sc, 7, MII_BMCR, phy_bmcr); CSR_WRITE_1(sc, RL_CFG1, RL_CFG1_DRVLOAD|RL_CFG1_FULLDUPLEX); /* * Set current media. */ mii_mediachg(&sc->mii); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; (void)splx(s); callout_reset(&sc->rl_tick_ch, hz, rl_tick, sc); } /* * Set media options. */ STATIC int rl_ifmedia_upd(ifp) struct ifnet *ifp; { struct rl_softc *sc; struct ifmedia *ifm; sc = ifp->if_softc; ifm = &sc->mii.mii_media; if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) return(EINVAL); return (mii_mediachg(&sc->mii)); } /* * Report current media status. */ STATIC void rl_ifmedia_sts(ifp, ifmr) struct ifnet *ifp; struct ifmediareq *ifmr; { struct rl_softc *sc; sc = ifp->if_softc; mii_pollstat(&sc->mii); ifmr->ifm_status = sc->mii.mii_media_status; ifmr->ifm_active = sc->mii.mii_media_active; } STATIC int rl_ether_ioctl(ifp, cmd, data) struct ifnet *ifp; u_long cmd; caddr_t data; { struct ifaddr *ifa = (struct ifaddr *) data; struct rl_softc *sc = ifp->if_softc; switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: rl_init(sc); arp_ifinit(ifp, ifa); break; #endif #ifdef NS case AF_NS: { struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *) LLADDR(ifp->if_sadl); else bcopy(ina->x_host.c_host, LLADDR(ifp->if_sadl), ifp->if_addrlen); /* Set new address. */ rl_init(sc); break; } #endif default: rl_init(sc); break; } break; default: return (EINVAL); } return (0); } STATIC int rl_ioctl(ifp, command, data) struct ifnet *ifp; u_long command; caddr_t data; { struct rl_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; int s, error = 0; s = splimp(); switch(command) { case SIOCSIFADDR: case SIOCGIFADDR: case SIOCSIFMTU: error = rl_ether_ioctl(ifp, command, data); break; case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { rl_init(sc); } else { if (ifp->if_flags & IFF_RUNNING) rl_stop(sc); } error = 0; break; case SIOCADDMULTI: case SIOCDELMULTI: rl_setmulti(sc); error = 0; break; case SIOCGIFMEDIA: case SIOCSIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->mii.mii_media, command); break; default: error = EINVAL; break; } (void)splx(s); return(error); } STATIC void rl_watchdog(ifp) struct ifnet *ifp; { struct rl_softc *sc; sc = ifp->if_softc; printf("%s: watchdog timeout\n", sc->sc_dev.dv_xname); ifp->if_oerrors++; rl_txeof(sc); rl_rxeof(sc); rl_init(sc); return; } /* * Stop the adapter and free any mbufs allocated to the * RX and TX lists. */ STATIC void rl_stop(sc) struct rl_softc *sc; { int i; struct ifnet *ifp; ifp = &sc->ethercom.ec_if; ifp->if_timer = 0; callout_stop(&sc->rl_tick_ch); mii_down(&sc->mii); CSR_WRITE_1(sc, RL_COMMAND, 0x00); CSR_WRITE_2(sc, RL_IMR, 0x0000); /* * Free the TX list buffers. */ for (i = 0; i < RL_TX_LIST_CNT; i++) { if (sc->rl_cdata.rl_tx_chain[i] != NULL) { m_freem(sc->rl_cdata.rl_tx_chain[i]); sc->rl_cdata.rl_tx_chain[i] = NULL; CSR_WRITE_4(sc, RL_TXADDR0 + i, 0x0000000); } } 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 rl_shutdown(vsc) void *vsc; { struct rl_softc *sc = (struct rl_softc *)vsc; rl_stop(sc); return; } STATIC void rl_tick(arg) void *arg; { struct rl_softc *sc = arg; int s = splnet(); mii_tick(&sc->mii); splx(s); callout_reset(&sc->rl_tick_ch, hz, rl_tick, sc); }