/* * Copyright (c) 1994 Herb Peyerl * 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 Herb Peyerl. * 4. The name of Herb Peyerl may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp */ /* * Modified from the FreeBSD 1.1.5.1 version by: * Andres Vega Garcia * INRIA - Sophia Antipolis, France * avega@sophia.inria.fr */ /* * $Id: if_ep.c,v 1.45 1996/06/12 05:03:38 gpalmer Exp $ * * Promiscuous mode added and interrupt logic slightly changed * to reduce the number of adapter failures. Transceiver select * logic changed to use value from EEPROM. Autoconfiguration * features added. * Done by: * Serge Babkin * Chelindbank (Chelyabinsk, Russia) * babkin@hq.icb.chel.su */ #include "ep.h" #if NEP > 0 #include "bpfilter.h" #include #if defined(__FreeBSD__) #include #include #include #include #endif #include #include #include #include #include #if defined(__NetBSD__) #include #endif #include #include #include #ifdef INET #include #include #include #include #include #endif #ifdef IPX #include #include #endif #ifdef NS #include #include #endif #if NBPFILTER > 0 #include #include #endif #if defined(__FreeBSD__) #include #endif #include #include #include #include #include /* Exported variables */ u_long ep_unit; int ep_boards; struct ep_board ep_board[EP_MAX_BOARDS + 1]; static int eeprom_rdy __P((struct ep_softc *sc)); static int ep_isa_probe __P((struct isa_device *)); static struct ep_board * ep_look_for_board_at __P((struct isa_device *is)); static int ep_isa_attach __P((struct isa_device *)); static void ep_isa_registerdev __P((struct ep_softc *sc, struct isa_device *id)); static int epioctl __P((struct ifnet * ifp, int, caddr_t)); static void epmbuffill __P((caddr_t, int)); static void epmbufempty __P((struct ep_softc *)); static void epinit __P((struct ep_softc *)); static void epread __P((struct ep_softc *)); void epreset __P((int)); static void epstart __P((struct ifnet *)); static void epstop __P((struct ep_softc *)); static void epwatchdog __P((struct ifnet *)); static int send_ID_sequence __P((int)); static int get_eeprom_data __P((int, int)); static struct ep_softc* ep_softc[NEP]; static int ep_current_tag = EP_LAST_TAG + 1; static char *ep_conn_type[] = {"UTP", "AUI", "???", "BNC"}; #define ep_ftst(f) (sc->stat&(f)) #define ep_fset(f) (sc->stat|=(f)) #define ep_frst(f) (sc->stat&=~(f)) struct isa_driver epdriver = { ep_isa_probe, ep_isa_attach, "ep", 0 }; static struct kern_devconf kdc_isa_ep = { 0, 0, 0, /* filled in by dev_attach */ "ep", 0, { MDDT_ISA, 0, "net" }, isa_generic_externalize, 0, 0, ISA_EXTERNALLEN, &kdc_isa0, /* parent */ 0, /* parentdata */ DC_UNCONFIGURED, /* state */ "3Com 3C509 Ethernet adapter", DC_CLS_NETIF /* class */ }; static void ep_isa_registerdev(sc, id) struct ep_softc *sc; struct isa_device *id; { sc->kdc = (struct kern_devconf *)malloc(sizeof(struct kern_devconf), M_DEVBUF, M_NOWAIT); if (!sc->kdc) { printf("WARNING: ep_isa_registerdev unable to malloc! " "Device kdc will not be registerd\n"); return; } bcopy(&kdc_isa_ep, sc->kdc, sizeof(kdc_isa_ep)); sc->kdc->kdc_unit = sc->unit; sc->kdc->kdc_parentdata = id; dev_attach(sc->kdc); } static int eeprom_rdy(sc) struct ep_softc *sc; { int i; for (i = 0; is_eeprom_busy(BASE) && i < MAX_EEPROMBUSY; i++); if (i >= MAX_EEPROMBUSY) { printf("ep%d: eeprom failed to come ready.\n", sc->unit); return (0); } return (1); } static struct ep_board * ep_look_for_board_at(is) struct isa_device *is; { int data, i, j, id_port = ELINK_ID_PORT; int count = 0; if (ep_current_tag == (EP_LAST_TAG + 1)) { /* Come here just one time */ ep_current_tag--; /* Look for the ISA boards. Init and leave them actived */ outb(id_port, 0); outb(id_port, 0); elink_idseq(0xCF); elink_reset(); DELAY(10000); for (i = 0; i < EP_MAX_BOARDS; i++) { outb(id_port, 0); outb(id_port, 0); elink_idseq(0xCF); data = get_eeprom_data(id_port, EEPROM_MFG_ID); if (data != MFG_ID) break; /* resolve contention using the Ethernet address */ for (j = 0; j < 3; j++) get_eeprom_data(id_port, j); /* and save this address for later use */ for (j = 0; j < 3; j++) ep_board[ep_boards].eth_addr[j] = get_eeprom_data(id_port, j); ep_board[ep_boards].res_cfg = get_eeprom_data(id_port, EEPROM_RESOURCE_CFG); ep_board[ep_boards].prod_id = get_eeprom_data(id_port, EEPROM_PROD_ID); ep_board[ep_boards].epb_used = 0; ep_board[ep_boards].epb_addr = (get_eeprom_data(id_port, EEPROM_ADDR_CFG) & 0x1f) * 0x10 + 0x200; if(ep_board[ep_boards].epb_addr > 0x3E0) /* Board in EISA configuration mode */ continue; outb(id_port, ep_current_tag); /* tags board */ outb(id_port, ACTIVATE_ADAPTER_TO_CONFIG); ep_boards++; count++; ep_current_tag--; } ep_board[ep_boards].epb_addr = 0; if (count) { printf("%d 3C5x9 board(s) on ISA found at", count); for (j = 0; ep_board[j].epb_addr; j++) if (ep_board[j].epb_addr <= 0x3E0) printf(" 0x%x", ep_board[j].epb_addr); printf("\n"); } } /* we have two cases: * * 1. Device was configured with 'port ?' * In this case we search for the first unused card in list * * 2. Device was configured with 'port xxx' * In this case we search for the unused card with that address * */ if(IS_BASE==-1) { /* port? */ for (i = 0; ep_board[i].epb_addr && ep_board[i].epb_used; i++); if(ep_board[i].epb_addr==0) return 0; IS_BASE=ep_board[i].epb_addr; ep_board[i].epb_used=1; return &ep_board[i]; } else { for (i=0; ep_board[i].epb_addr && ep_board[i].epb_addr != IS_BASE; i++); if( ep_board[i].epb_used || ep_board[i].epb_addr != IS_BASE) return 0; if (inw(IS_BASE + EP_W0_EEPROM_COMMAND) & EEPROM_TST_MODE) printf("ep%d: 3c5x9 at 0x%x in PnP mode. Disable PnP mode!\n", is->id_unit, IS_BASE); ep_board[i].epb_used=1; return &ep_board[i]; } } /* * get_e: gets a 16 bits word from the EEPROM. we must have set the window * before */ u_int16_t get_e(sc, offset) struct ep_softc *sc; int offset; { if (!eeprom_rdy(sc)) return (0xffff); outw(BASE + EP_W0_EEPROM_COMMAND, EEPROM_CMD_RD | offset); if (!eeprom_rdy(sc)) return (0xffff); return (inw(BASE + EP_W0_EEPROM_DATA)); } struct ep_softc * ep_alloc(unit, epb) int unit; struct ep_board *epb; { struct ep_softc *sc; if (unit >= NEP) { printf("ep: unit number (%d) too high\n", unit); return NULL; } /* * Allocate a storage area for us */ if (ep_softc[unit]) { printf("ep%d: unit number already allocated to another " "adaptor\n", unit); return NULL; } sc = malloc(sizeof(struct ep_softc), M_DEVBUF, M_NOWAIT); if(!sc) { printf("ep%d: cannot malloc!\n", unit); return NULL; } bzero(sc, sizeof(struct ep_softc)); ep_softc[unit] = sc; sc->unit = unit; sc->ep_io_addr = epb->epb_addr; sc->epb = epb; return(sc); } void ep_free(sc) struct ep_softc *sc; { ep_softc[sc->unit] = NULL; free(sc, M_DEVBUF); return; } int ep_isa_probe(is) struct isa_device *is; { struct ep_softc *sc; struct ep_board *epb; u_short k; if(( epb=ep_look_for_board_at(is) )==0) return (0); /* * Allocate a storage area for us */ sc = ep_alloc(ep_unit, epb); if( !sc ) return (0); is->id_unit = ep_unit++; ep_isa_registerdev(sc, is); /* * The iobase was found and MFG_ID was 0x6d50. PROD_ID should be * 0x9[0-f]50 */ GO_WINDOW(0); k = sc->epb->prod_id; if ((k & 0xf0ff) != (PROD_ID & 0xf0ff)) { printf("ep_isa_probe: ignoring model %04x\n", k); ep_free(sc); return (0); } k = sc->epb->res_cfg; k >>= 12; /* Now we have two cases again: * * 1. Device was configured with 'irq?' * In this case we use irq read from the board * * 2. Device was configured with 'irq xxx' * In this case we set up the board to use specified interrupt * */ if(is->id_irq==0) { /* irq? */ is->id_irq= 1 << ( (k==2) ? 9 : k ); } sc->stat = 0; /* 16 bit access */ /* By now, the adapter is already activated */ return (EP_IOSIZE); /* 16 bytes of I/O space used. */ } static int ep_isa_attach(is) struct isa_device *is; { struct ep_softc *sc = ep_softc[is->id_unit]; u_short config; int irq; sc->ep_connectors = 0; config = inw(IS_BASE + EP_W0_CONFIG_CTRL); if (config & IS_AUI) { sc->ep_connectors |= AUI; } if (config & IS_BNC) { sc->ep_connectors |= BNC; } if (config & IS_UTP) { sc->ep_connectors |= UTP; } if (!(sc->ep_connectors & 7)) printf("no connectors!"); sc->ep_connector = inw(BASE + EP_W0_ADDRESS_CFG) >> ACF_CONNECTOR_BITS; /* * Write IRQ value to board */ irq = ffs(is->id_irq) - 1; if(irq == -1) { printf(" invalid irq... cannot attach\n"); return 0; } GO_WINDOW(0); if(irq == 9) irq = 2; outw(BASE + EP_W0_RESOURCE_CFG, SET_IRQ(irq)); ep_attach(sc); return 1; } int ep_attach(sc) struct ep_softc *sc; { struct ifaddr *ifa; struct ifnet *ifp = &sc->arpcom.ac_if; struct sockaddr_dl *sdl; u_short *p; int i; printf("ep%d: ", sc->unit); /* * Current media type */ if(sc->ep_connectors & AUI) { printf("aui"); if(sc->ep_connectors & ~AUI) printf("/"); } if(sc->ep_connectors & UTP) { printf("utp"); if(sc->ep_connectors & BNC) printf("/"); } if(sc->ep_connectors & BNC) { printf("bnc"); } printf("[*%s*]", ep_conn_type[sc->ep_connector]); /* * Setup the station address */ p = (u_short *) & sc->arpcom.ac_enaddr; GO_WINDOW(2); for (i = 0; i < 3; i++) { p[i] = htons(sc->epb->eth_addr[i]); outw(BASE + EP_W2_ADDR_0 + (i * 2), ntohs(p[i])); } printf(" address %6D\n", sc->arpcom.ac_enaddr); ifp->if_softc = sc; ifp->if_unit = sc->unit; ifp->if_name = "ep"; ifp->if_mtu = ETHERMTU; ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; ifp->if_output = ether_output; ifp->if_start = epstart; ifp->if_ioctl = epioctl; ifp->if_watchdog = epwatchdog; if_attach(ifp); ether_ifattach(ifp); /* device attach does transition from UNCONFIGURED to IDLE state */ sc->kdc->kdc_state=DC_IDLE; /* * Fill the hardware address into ifa_addr if we find an AF_LINK entry. * We need to do this so bpf's can get the hardware addr of this card. * netstat likes this too! */ ifa = ifp->if_addrlist; while ((ifa != 0) && (ifa->ifa_addr != 0) && (ifa->ifa_addr->sa_family != AF_LINK)) ifa = ifa->ifa_next; if ((ifa != 0) && (ifa->ifa_addr != 0)) { sdl = (struct sockaddr_dl *) ifa->ifa_addr; sdl->sdl_type = IFT_ETHER; sdl->sdl_alen = ETHER_ADDR_LEN; sdl->sdl_slen = 0; bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN); } /* we give some initial parameters */ sc->rx_avg_pkt = 128; /* * NOTE: In all this I multiply everything by 64. * W_s = the speed the CPU is able to write to the TX FIFO. * T_s = the speed the board sends the info to the Ether. * W_s/T_s = 16 (represents 16/64) => W_s = 25 % of T_s. * This will give us for a packet of 1500 bytes * tx_start_thresh=1125 and for a pkt of 64 bytes tx_start_threshold=48. * We prefer to start thinking the CPU is much slower than the Ethernet * transmission. */ sc->tx_rate = TX_INIT_RATE; sc->tx_counter = 0; sc->rx_latency = RX_INIT_LATENCY; sc->rx_early_thresh = RX_INIT_EARLY_THRESH; #ifdef EP_LOCAL_STATS sc->rx_no_first = sc->rx_no_mbuf = sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0; #endif ep_fset(F_RX_FIRST); sc->top = sc->mcur = 0; #if NBPFILTER > 0 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); #endif return 0; } /* * The order in here seems important. Otherwise we may not receive * interrupts. ?! */ static void epinit(sc) struct ep_softc *sc; { register struct ifnet *ifp = &sc->arpcom.ac_if; int s, i; /* if (ifp->if_addrlist == (struct ifaddr *) 0) return; */ s = splimp(); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); GO_WINDOW(0); outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); GO_WINDOW(4); outw(BASE + EP_W4_MEDIA_TYPE, DISABLE_UTP); GO_WINDOW(0); /* Disable the card */ outw(BASE + EP_W0_CONFIG_CTRL, 0); /* Enable the card */ outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ); GO_WINDOW(2); /* Reload the ether_addr. */ for (i = 0; i < 6; i++) outb(BASE + EP_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]); outw(BASE + EP_COMMAND, RX_RESET); outw(BASE + EP_COMMAND, TX_RESET); /* Window 1 is operating window */ GO_WINDOW(1); for (i = 0; i < 31; i++) inb(BASE + EP_W1_TX_STATUS); /* get rid of stray intr's */ outw(BASE + EP_COMMAND, ACK_INTR | 0xff); outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_5_INTS); outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS); if(ifp->if_flags & IFF_PROMISC) outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | FIL_GROUP | FIL_BRDCST | FIL_ALL); else outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL | FIL_GROUP | FIL_BRDCST); /* * S.B. * * Now behavior was slightly changed: * * if any of flags link[0-2] is used and its connector is * physically present the following connectors are used: * * link0 - AUI * highest precedence * link1 - BNC * link2 - UTP * lowest precedence * * If none of them is specified then * connector specified in the EEPROM is used * (if present on card or AUI if not). * */ /* Set the xcvr. */ if(ifp->if_flags & IFF_LINK0 && sc->ep_connectors & AUI) { i = ACF_CONNECTOR_AUI; } else if(ifp->if_flags & IFF_LINK1 && sc->ep_connectors & BNC) { i = ACF_CONNECTOR_BNC; } else if(ifp->if_flags & IFF_LINK2 && sc->ep_connectors & UTP) { i = ACF_CONNECTOR_UTP; } else { i = sc->ep_connector; } GO_WINDOW(0); j = inw(BASE + EP_W0_ADDRESS_CFG) & 0x3fff; outw(BASE + EP_W0_ADDRESS_CFG, j | (i << ACF_CONNECTOR_BITS)); switch(i) { case ACF_CONNECTOR_UTP: if(sc->ep_connectors & UTP) { GO_WINDOW(4); outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP); } break; case ACF_CONNECTOR_BNC: if(sc->ep_connectors & BNC) { outw(BASE + EP_COMMAND, START_TRANSCEIVER); DELAY(1000); } break; case ACF_CONNECTOR_AUI: /* nothing to do */ break; default: printf("ep%d: strange connector type in EEPROM: assuming AUI\n", sc->unit); break; } outw(BASE + EP_COMMAND, RX_ENABLE); outw(BASE + EP_COMMAND, TX_ENABLE); ifp->if_flags |= IFF_RUNNING; ifp->if_flags &= ~IFF_OACTIVE; /* just in case */ sc->tx_rate = TX_INIT_RATE; sc->tx_counter = 0; sc->rx_latency = RX_INIT_LATENCY; sc->rx_early_thresh = RX_INIT_EARLY_THRESH; #ifdef EP_LOCAL_STATS sc->rx_no_first = sc->rx_no_mbuf = sc->rx_bpf_disc = sc->rx_overrunf = sc->rx_overrunl = sc->tx_underrun = 0; #endif ep_fset(F_RX_FIRST); ep_frst(F_RX_TRAILER); if (sc->top) { m_freem(sc->top); sc->top = sc->mcur = 0; } outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | sc->rx_early_thresh); /* * These clever computations look very interesting * but the fixed threshold gives near no output errors * and if it as low as 16 bytes it gives the max. throughput. * We think that processor is anyway quicker than Ethernet * (and this should be true for any 386 and higher) */ outw(BASE + EP_COMMAND, SET_TX_START_THRESH | 16); /* * Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up * any that we had in case we're being called from intr or somewhere * else. */ sc->last_mb = 0; sc->next_mb = 0; epmbuffill((caddr_t) sc, 0); GO_WINDOW(1); epstart(ifp); splx(s); } static const char padmap[] = {0, 3, 2, 1}; static void epstart(ifp) struct ifnet *ifp; { register struct ep_softc *sc = ifp->if_softc; register u_int len; register struct mbuf *m; struct mbuf *top; int s, pad; s = splimp(); if (ifp->if_flags & IFF_OACTIVE) { splx(s); return; } startagain: /* Sneak a peek at the next packet */ m = ifp->if_snd.ifq_head; if (m == 0) { splx(s); return; } for (len = 0, top = m; m; m = m->m_next) len += m->m_len; pad = padmap[len & 3]; /* * The 3c509 automatically pads short packets to minimum ethernet length, * but we drop packets that are too large. Perhaps we should truncate * them instead? */ if (len + pad > ETHER_MAX_LEN) { /* packet is obviously too large: toss it */ ++ifp->if_oerrors; IF_DEQUEUE(&ifp->if_snd, m); m_freem(m); goto readcheck; } if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) { /* no room in FIFO */ outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4)); ifp->if_flags |= IFF_OACTIVE; splx(s); return; } IF_DEQUEUE(&ifp->if_snd, m); outw(BASE + EP_W1_TX_PIO_WR_1, len); outw(BASE + EP_W1_TX_PIO_WR_1, 0x0); /* Second dword meaningless */ /* compute the Tx start threshold for this packet */ sc->tx_start_thresh = len = (((len * (64 - sc->tx_rate)) >> 6) & ~3) + 16; #if 0 /* * The following string does something strange with the card and * we get a lot of output errors due to it so it's commented out * and we use fixed threshold (see above) */ outw(BASE + EP_COMMAND, SET_TX_START_THRESH | len); #endif for (top = m; m != 0; m = m->m_next) if(ep_ftst(F_ACCESS_32_BITS)) { outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 4); if (m->m_len & 3) outsb(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t) + (m->m_len & (~3)), m->m_len & 3); } else { outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2); if (m->m_len & 1) outb(BASE + EP_W1_TX_PIO_WR_1, *(mtod(m, caddr_t) + m->m_len - 1)); } while (pad--) outb(BASE + EP_W1_TX_PIO_WR_1, 0); /* Padding */ #if NBPFILTER > 0 if (ifp->if_bpf) { bpf_mtap(ifp, top); } #endif ifp->if_timer=2; ifp->if_opackets++; m_freem(top); /* * Every 1024*4 packets we increment the tx_rate if we haven't had * errors, that in the case it has abnormaly goten too low */ if (!(++sc->tx_counter & (1024 * 4 - 1)) && sc->tx_rate < TX_INIT_MAX_RATE) sc->tx_rate++; /* * Is another packet coming in? We don't want to overflow the tiny RX * fifo. */ readcheck: if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) { /* * we check if we have packets left, in that case we prepare to come * back later */ if (ifp->if_snd.ifq_head) { outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | sc->tx_start_thresh); } splx(s); return; } goto startagain; } void epintr(unit) int unit; { register struct ep_softc *sc = ep_softc[unit]; ep_intr(sc); } void ep_intr(arg) void *arg; { struct ep_softc *sc; register int status; struct ifnet *ifp; int x; x=splbio(); sc = (struct ep_softc *)arg; ifp = &sc->arpcom.ac_if; outw(BASE + EP_COMMAND, SET_INTR_MASK); /* disable all Ints */ rescan: while ((status = inw(BASE + EP_STATUS)) & S_5_INTS) { /* first acknowledge all interrupt sources */ outw(BASE + EP_COMMAND, ACK_INTR | (status & S_MASK)); if (status & (S_RX_COMPLETE | S_RX_EARLY)) { epread(sc); continue; } if (status & S_TX_AVAIL) { /* we need ACK */ ifp->if_timer=0; ifp->if_flags &= ~IFF_OACTIVE; GO_WINDOW(1); inw(BASE + EP_W1_FREE_TX); epstart(ifp); } if (status & S_CARD_FAILURE) { ifp->if_timer=0; #ifdef EP_LOCAL_STATS printf("\nep%d:\n\tStatus: %x\n", sc->unit, status); GO_WINDOW(4); printf("\tFIFO Diagnostic: %x\n", inw(BASE + EP_W4_FIFO_DIAG)); printf("\tStat: %x\n", sc->stat); printf("\tIpackets=%d, Opackets=%d\n", ifp->if_ipackets, ifp->if_opackets); printf("\tNOF=%d, NOMB=%d, BPFD=%d, RXOF=%d, RXOL=%d, TXU=%d\n", sc->rx_no_first, sc->rx_no_mbuf, sc->rx_bpf_disc, sc->rx_overrunf, sc->rx_overrunl, sc->tx_underrun); #else #ifdef DIAGNOSTIC printf("ep%d: Status: %x (input buffer overflow)\n", sc->unit, status); #else ++ifp->if_ierrors; #endif #endif epinit(sc); splx(x); return; } if (status & S_TX_COMPLETE) { ifp->if_timer=0; /* we need ACK. we do it at the end */ /* * We need to read TX_STATUS until we get a 0 status in order to * turn off the interrupt flag. */ while ((status = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) { if (status & TXS_SUCCES_INTR_REQ); else if (status & (TXS_UNDERRUN | TXS_JABBER | TXS_MAX_COLLISION)) { outw(BASE + EP_COMMAND, TX_RESET); if (status & TXS_UNDERRUN) { if (sc->tx_rate > 1) { sc->tx_rate--; /* Actually in steps of 1/64 */ sc->tx_counter = 0; /* We reset it */ } #ifdef EP_LOCAL_STATS sc->tx_underrun++; #endif } else { if (status & TXS_JABBER); else /* TXS_MAX_COLLISION - we shouldn't get here */ ++ifp->if_collisions; } ++ifp->if_oerrors; outw(BASE + EP_COMMAND, TX_ENABLE); /* * To have a tx_avail_int but giving the chance to the * Reception */ if (ifp->if_snd.ifq_head) { outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | 8); } } outb(BASE + EP_W1_TX_STATUS, 0x0); /* pops up the next * status */ } /* while */ ifp->if_flags &= ~IFF_OACTIVE; GO_WINDOW(1); inw(BASE + EP_W1_FREE_TX); epstart(ifp); } /* end TX_COMPLETE */ } outw(BASE + EP_COMMAND, C_INTR_LATCH); /* ACK int Latch */ if ((status = inw(BASE + EP_STATUS)) & S_5_INTS) goto rescan; /* re-enable Ints */ outw(BASE + EP_COMMAND, SET_INTR_MASK | S_5_INTS); splx(x); } static void epread(sc) register struct ep_softc *sc; { struct ether_header *eh; struct mbuf *top, *mcur, *m; struct ifnet *ifp; int lenthisone; short rx_fifo2, status; register short delta; register short rx_fifo; ifp = &sc->arpcom.ac_if; status = inw(BASE + EP_W1_RX_STATUS); read_again: if (status & ERR_RX) { ++ifp->if_ierrors; if (status & ERR_RX_OVERRUN) { /* * we can think the rx latency is actually greather than we * expect */ #ifdef EP_LOCAL_STATS if (ep_ftst(F_RX_FIRST)) sc->rx_overrunf++; else sc->rx_overrunl++; #endif if (sc->rx_latency < ETHERMTU) sc->rx_latency += 16; } goto out; } rx_fifo = rx_fifo2 = status & RX_BYTES_MASK; if (ep_ftst(F_RX_FIRST)) { if (m = sc->mb[sc->next_mb]) { sc->mb[sc->next_mb] = 0; sc->next_mb = (sc->next_mb + 1) % MAX_MBS; m->m_data = m->m_pktdat; m->m_flags = M_PKTHDR; } else { MGETHDR(m, M_DONTWAIT, MT_DATA); if (!m) goto out; } sc->top = sc->mcur = top = m; #define EROUND ((sizeof(struct ether_header) + 3) & ~3) #define EOFF (EROUND - sizeof(struct ether_header)) top->m_data += EOFF; /* Read what should be the header. */ insw(BASE + EP_W1_RX_PIO_RD_1, mtod(top, caddr_t), sizeof(struct ether_header) / 2); top->m_len = sizeof(struct ether_header); rx_fifo -= sizeof(struct ether_header); sc->cur_len = rx_fifo2; } else { /* come here if we didn't have a complete packet last time */ top = sc->top; m = sc->mcur; sc->cur_len += rx_fifo2; if (ep_ftst(F_RX_TRAILER)) /* We don't read the trailer */ rx_fifo -= sizeof(struct ether_header); } /* Reads what is left in the RX FIFO */ while (rx_fifo > 0) { lenthisone = min(rx_fifo, M_TRAILINGSPACE(m)); if (lenthisone == 0) { /* no room in this one */ mcur = m; if (m = sc->mb[sc->next_mb]) { sc->mb[sc->next_mb] = 0; sc->next_mb = (sc->next_mb + 1) % MAX_MBS; } else { MGET(m, M_DONTWAIT, MT_DATA); if (!m) goto out; } if (rx_fifo >= MINCLSIZE) MCLGET(m, M_DONTWAIT); m->m_len = 0; mcur->m_next = m; lenthisone = min(rx_fifo, M_TRAILINGSPACE(m)); } if (ep_ftst(F_ACCESS_32_BITS)) { /* default for EISA configured cards*/ insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len, lenthisone / 4); m->m_len += (lenthisone & ~3); if (lenthisone & 3) insb(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len, lenthisone & 3); m->m_len += (lenthisone & 3); } else { insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len, lenthisone / 2); m->m_len += lenthisone; if (lenthisone & 1) *(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1); } rx_fifo -= lenthisone; } if (ep_ftst(F_RX_TRAILER)) {/* reads the trailer */ if (m = sc->mb[sc->next_mb]) { sc->mb[sc->next_mb] = 0; sc->next_mb = (sc->next_mb + 1) % MAX_MBS; m->m_data = m->m_pktdat; m->m_flags = M_PKTHDR; } else { MGETHDR(m, M_DONTWAIT, MT_DATA); if (!m) goto out; } insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t), sizeof(struct ether_header)); m->m_len = sizeof(struct ether_header); m->m_next = top; sc->top = top = m; /* XXX Accomodate for type and len from beginning of trailer */ sc->cur_len -= (2 * sizeof(u_short)); ep_frst(F_RX_TRAILER); goto all_pkt; } if (status & ERR_RX_INCOMPLETE) { /* we haven't received the complete * packet */ sc->mcur = m; #ifdef EP_LOCAL_STATS sc->rx_no_first++; /* to know how often we come here */ #endif /* * Re-compute rx_latency, the factor used is 1/4 to go up and 1/32 to * go down */ delta = rx_fifo2 - sc->rx_early_thresh; /* last latency seen LLS */ delta -= sc->rx_latency;/* LLS - estimated_latency */ if (delta >= 0) sc->rx_latency += (delta / 4); else sc->rx_latency += (delta / 32); ep_frst(F_RX_FIRST); if (!((status = inw(BASE + EP_W1_RX_STATUS)) & ERR_RX_INCOMPLETE)) { /* we see if by now, the packet has completly arrived */ goto read_again; } /* compute rx_early_threshold */ delta = (sc->rx_avg_pkt - sc->cur_len - sc->rx_latency - 16) & ~3; if (delta < MIN_RX_EARLY_THRESHL) delta = MIN_RX_EARLY_THRESHL; outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | (sc->rx_early_thresh = delta)); return; } all_pkt: outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); /* * recompute average packet's length, the factor used is 1/8 to go down * and 1/32 to go up */ delta = sc->cur_len - sc->rx_avg_pkt; if (delta > 0) sc->rx_avg_pkt += (delta / 32); else sc->rx_avg_pkt += (delta / 8); delta = (sc->rx_avg_pkt - sc->rx_latency - 16) & ~3; if (delta < MIN_RX_EARLY_THRESHF) delta = MIN_RX_EARLY_THRESHF; sc->rx_early_thresh = delta; ++ifp->if_ipackets; ep_fset(F_RX_FIRST); ep_frst(F_RX_TRAILER); top->m_pkthdr.rcvif = &sc->arpcom.ac_if; top->m_pkthdr.len = sc->cur_len; #if NBPFILTER > 0 if (ifp->if_bpf) { bpf_mtap(ifp, top); /* * Note that the interface cannot be in promiscuous mode if there are * no BPF listeners. And if we are in promiscuous mode, we have to * check if this packet is really ours. */ eh = mtod(top, struct ether_header *); if ((ifp->if_flags & IFF_PROMISC) && (eh->ether_dhost[0] & 1) == 0 && bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr, sizeof(eh->ether_dhost)) != 0 && bcmp(eh->ether_dhost, etherbroadcastaddr, sizeof(eh->ether_dhost)) != 0) { if (sc->top) { m_freem(sc->top); sc->top = 0; } ep_fset(F_RX_FIRST); ep_frst(F_RX_TRAILER); #ifdef EP_LOCAL_STATS sc->rx_bpf_disc++; #endif while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | delta); return; } } #endif eh = mtod(top, struct ether_header *); m_adj(top, sizeof(struct ether_header)); ether_input(ifp, eh, top); if (!sc->mb[sc->next_mb]) epmbuffill((caddr_t) sc, 0); sc->top = 0; while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | delta); return; out: outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); if (sc->top) { m_freem(sc->top); sc->top = 0; #ifdef EP_LOCAL_STATS sc->rx_no_mbuf++; #endif } delta = (sc->rx_avg_pkt - sc->rx_latency - 16) & ~3; if (delta < MIN_RX_EARLY_THRESHF) delta = MIN_RX_EARLY_THRESHF; ep_fset(F_RX_FIRST); ep_frst(F_RX_TRAILER); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); outw(BASE + EP_COMMAND, SET_RX_EARLY_THRESH | (sc->rx_early_thresh = delta)); } /* * Look familiar? */ static int epioctl(ifp, cmd, data) register struct ifnet *ifp; int cmd; caddr_t data; { register struct ifaddr *ifa = (struct ifaddr *) data; struct ep_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *) data; int s, error = 0; s = splimp(); switch (cmd) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; /* netifs are BUSY when UP */ sc->kdc->kdc_state=DC_BUSY; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: epinit(sc); /* before arpwhohas */ arp_ifinit((struct arpcom *)ifp, ifa); break; #endif #ifdef IPX case AF_IPX: { register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); if (ipx_nullhost(*ina)) ina->x_host = *(union ipx_host *) (sc->arpcom.ac_enaddr); else { ifp->if_flags &= ~IFF_RUNNING; bcopy((caddr_t) ina->x_host.c_host, (caddr_t) sc->arpcom.ac_enaddr, sizeof(sc->arpcom.ac_enaddr)); } epinit(sc); break; } #endif #ifdef NS case AF_NS: { register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); if (ns_nullhost(*ina)) ina->x_host = *(union ns_host *) (sc->arpcom.ac_enaddr); else { ifp->if_flags &= ~IFF_RUNNING; bcopy((caddr_t) ina->x_host.c_host, (caddr_t) sc->arpcom.ac_enaddr, sizeof(sc->arpcom.ac_enaddr)); } epinit(sc); break; } #endif default: epinit(sc); break; } break; case SIOCGIFADDR: { struct sockaddr *sa; sa = (struct sockaddr *) & ifr->ifr_data; bcopy((caddr_t) sc->arpcom.ac_enaddr, (caddr_t) sa->sa_data, ETHER_ADDR_LEN); } break; case SIOCSIFFLAGS: /* UP controls BUSY/IDLE */ sc->kdc->kdc_state= ( (ifp->if_flags & IFF_UP) ? DC_BUSY : DC_IDLE ); if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) { ifp->if_flags &= ~IFF_RUNNING; epstop(sc); epmbufempty(sc); break; } else { /* reinitialize card on any parameter change */ epinit(sc); break; } /* NOTREACHED */ break; #ifdef notdef case SIOCGHWADDR: bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data, sizeof(sc->sc_addr)); break; #endif case SIOCSIFMTU: /* * Set the interface MTU. */ if (ifr->ifr_mtu > ETHERMTU) { error = EINVAL; } else { ifp->if_mtu = ifr->ifr_mtu; } break; case SIOCADDMULTI: case SIOCDELMULTI: /* Now this driver has no support for programmable * multicast filters. If some day it will gain this * support this part of code must be extended. */ error=0; break; default: error = EINVAL; } splx(s); return (error); } static void epwatchdog(ifp) struct ifnet *ifp; { /* printf("ep: watchdog\n"); log(LOG_ERR, "ep%d: watchdog\n", ifp->if_unit); ifp->if_oerrors++; */ ifp->if_flags &= ~IFF_OACTIVE; epstart(ifp); ep_intr(ifp->if_softc); } static void epstop(sc) struct ep_softc *sc; { outw(BASE + EP_COMMAND, RX_DISABLE); outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK); while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS); outw(BASE + EP_COMMAND, TX_DISABLE); outw(BASE + EP_COMMAND, STOP_TRANSCEIVER); outw(BASE + EP_COMMAND, RX_RESET); outw(BASE + EP_COMMAND, TX_RESET); outw(BASE + EP_COMMAND, C_INTR_LATCH); outw(BASE + EP_COMMAND, SET_RD_0_MASK); outw(BASE + EP_COMMAND, SET_INTR_MASK); outw(BASE + EP_COMMAND, SET_RX_FILTER); } static int send_ID_sequence(port) int port; { int cx, al; for (al = 0xff, cx = 0; cx < 255; cx++) { outb(port, al); al <<= 1; if (al & 0x100) al ^= 0xcf; } return (1); } /* * We get eeprom data from the id_port given an offset into the eeprom. * Basically; after the ID_sequence is sent to all of the cards; they enter * the ID_CMD state where they will accept command requests. 0x80-0xbf loads * the eeprom data. We then read the port 16 times and with every read; the * cards check for contention (ie: if one card writes a 0 bit and another * writes a 1 bit then the host sees a 0. At the end of the cycle; each card * compares the data on the bus; if there is a difference then that card goes * into ID_WAIT state again). In the meantime; one bit of data is returned in * the AX register which is conveniently returned to us by inb(). Hence; we * read 16 times getting one bit of data with each read. */ static int get_eeprom_data(id_port, offset) int id_port; int offset; { int i, data = 0; outb(id_port, 0x80 + offset); DELAY(1000); for (i = 0; i < 16; i++) data = (data << 1) | (inw(id_port) & 1); return (data); } /* * We suppose this is always called inside a splimp(){...}splx() region */ static void epmbuffill(sp, dummy_arg) caddr_t sp; int dummy_arg; { struct ep_softc *sc = (struct ep_softc *) sp; int i; i = sc->last_mb; do { if (sc->mb[i] == NULL) MGET(sc->mb[i], M_DONTWAIT, MT_DATA); if (sc->mb[i] == NULL) break; i = (i + 1) % MAX_MBS; } while (i != sc->next_mb); sc->last_mb = i; } static void epmbufempty(sc) struct ep_softc *sc; { int s, i; s = splimp(); for (i = 0; i < MAX_MBS; i++) { if (sc->mb[i]) { m_freem(sc->mb[i]); sc->mb[i] = NULL; } } sc->last_mb = sc->next_mb = 0; splx(s); } #endif /* NEP > 0 */