diff options
author | Federico G. Schwindt <fgsch@cvs.openbsd.org> | 1998-09-22 06:41:14 +0000 |
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committer | Federico G. Schwindt <fgsch@cvs.openbsd.org> | 1998-09-22 06:41:14 +0000 |
commit | b5409cddfc0b0492cb65d50f3bf783cfae00c3b1 (patch) | |
tree | 0505c87d8117afa72ce2a35711d28b5525d182ca /sys/dev/ic/dp8390.c | |
parent | 1570dd0e22fd84039cf86fc9d726df05ef399077 (diff) |
New DS8390/WD83C690 device driver used by ec, ne and we from NetBSD.
Diffstat (limited to 'sys/dev/ic/dp8390.c')
-rw-r--r-- | sys/dev/ic/dp8390.c | 1336 |
1 files changed, 1336 insertions, 0 deletions
diff --git a/sys/dev/ic/dp8390.c b/sys/dev/ic/dp8390.c new file mode 100644 index 00000000000..2df1fea5ad3 --- /dev/null +++ b/sys/dev/ic/dp8390.c @@ -0,0 +1,1336 @@ +/* $OpenBSD: dp8390.c,v 1.1 1998/09/22 06:41:12 fgsch Exp $ */ +/* $NetBSD: dp8390.c,v 1.13 1998/07/05 06:49:11 jonathan Exp $ */ + +/* + * Device driver for National Semiconductor DS8390/WD83C690 based ethernet + * adapters. + * + * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. + * + * Copyright (C) 1993, David Greenman. This software may be used, modified, + * copied, distributed, and sold, in both source and binary form provided that + * the above copyright and these terms are retained. Under no circumstances is + * the author responsible for the proper functioning of this software, nor does + * the author assume any responsibility for damages incurred with its use. + */ + +#include "bpfilter.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/device.h> +#include <sys/errno.h> +#include <sys/ioctl.h> +#include <sys/mbuf.h> +#include <sys/socket.h> +#include <sys/syslog.h> + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/if_types.h> +#include <net/if_media.h> +#ifdef __NetBSD__ +#include <net/if_ether.h> +#endif + +#ifdef INET +#include <netinet/in.h> +#include <netinet/in_systm.h> +#include <netinet/in_var.h> +#include <netinet/ip.h> +#ifdef __NetBSD__ +#include <netinet/if_inarp.h> +#else +#include <netinet/if_ether.h> +#endif +#endif + +#ifdef NS +#include <netns/ns.h> +#include <netns/ns_if.h> +#endif + +#if NBPFILTER > 0 +#include <net/bpf.h> +#include <net/bpfdesc.h> +#endif + +#include <machine/bus.h> + +#include <dev/ic/dp8390reg.h> +#include <dev/ic/dp8390var.h> + +#ifdef DEBUG +#define __inline__ /* XXX for debugging porpoises */ +#endif + +static __inline__ void dp8390_xmit __P((struct dp8390_softc *)); + +static __inline__ void dp8390_read_hdr __P((struct dp8390_softc *, + int, struct dp8390_ring *)); +static __inline__ int dp8390_ring_copy __P((struct dp8390_softc *, + int, caddr_t, u_short)); +static __inline__ int dp8390_write_mbuf __P((struct dp8390_softc *, + struct mbuf *, int)); + +static int dp8390_test_mem __P((struct dp8390_softc *)); + +int dp8390_enable __P((struct dp8390_softc *)); +void dp8390_disable __P((struct dp8390_softc *)); + +int dp8390_mediachange __P((struct ifnet *)); +void dp8390_mediastatus __P((struct ifnet *, struct ifmediareq *)); + +#define ETHER_MIN_LEN 64 +#define ETHER_MAX_LEN 1518 +#define ETHER_ADDR_LEN 6 + +int dp8390_debug = 0; + +/* + * Do bus-independent setup. + */ +int +dp8390_config(sc, media, nmedia, defmedia) + struct dp8390_softc *sc; + int *media, nmedia, defmedia; +{ +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + int i, rv; + + rv = 1; + + if (!sc->test_mem) + sc->test_mem = dp8390_test_mem; + + /* Allocate one xmit buffer if < 16k, two buffers otherwise. */ + if ((sc->mem_size < 16384) || + (sc->sc_flags & DP8390_NO_MULTI_BUFFERING)) + sc->txb_cnt = 1; + else + sc->txb_cnt = 2; + + sc->tx_page_start = sc->mem_start >> ED_PAGE_SHIFT; + sc->rec_page_start = sc->tx_page_start + sc->txb_cnt * ED_TXBUF_SIZE; + sc->rec_page_stop = sc->tx_page_start + (sc->mem_size >> ED_PAGE_SHIFT); + sc->mem_ring = sc->mem_start + (sc->rec_page_start << ED_PAGE_SHIFT); + sc->mem_end = sc->mem_start + sc->mem_size; + + /* Now zero memory and verify that it is clear. */ + if ((*sc->test_mem)(sc)) + goto out; + + /* Set interface to stopped condition (reset). */ + dp8390_stop(sc); + + /* Initialize ifnet structure. */ + bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); + ifp->if_softc = sc; + ifp->if_start = dp8390_start; + ifp->if_ioctl = dp8390_ioctl; + if (!ifp->if_watchdog) + ifp->if_watchdog = dp8390_watchdog; + ifp->if_flags = + IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; + + /* Initialize media goo. */ + ifmedia_init(&sc->sc_media, 0, dp8390_mediachange, dp8390_mediastatus); + if (media != NULL) { + for (i = 0; i < nmedia; i++) + ifmedia_add(&sc->sc_media, media[i], 0, NULL); + ifmedia_set(&sc->sc_media, defmedia); + } else { + ifmedia_add(&sc->sc_media, IFM_ETHER|IFM_MANUAL, 0, NULL); + ifmedia_set(&sc->sc_media, IFM_ETHER|IFM_MANUAL); + } + + /* Attach the interface. */ + if_attach(ifp); +#ifdef __NetBSD__ + ether_ifattach(ifp, sc->sc_enaddr); +#else + ether_ifattach(ifp); +#endif +#if NBPFILTER > 0 +#ifdef __NetBSD__ + bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header)); +#else + bpfattach(&sc->sc_arpcom.ac_if.if_bpf, ifp, DLT_EN10MB, + sizeof(struct ether_header)); +#endif +#endif + + /* Print additional info when attached. */ + printf("%s: Ethernet address %s\n", sc->sc_dev.dv_xname, +#ifdef __NetBSD__ + ether_sprintf(sc->sc_enaddr)); +#else + ether_sprintf(sc->sc_arpcom.ac_enaddr)); +#endif + + rv = 0; +out: + return (rv); +} + +/* + * Media change callback. + */ +int +dp8390_mediachange(ifp) + struct ifnet *ifp; +{ + struct dp8390_softc *sc = ifp->if_softc; + + if (sc->sc_mediachange) + return ((*sc->sc_mediachange)(sc)); + return (EINVAL); +} + +/* + * Media status callback. + */ +void +dp8390_mediastatus(ifp, ifmr) + struct ifnet *ifp; + struct ifmediareq *ifmr; +{ + struct dp8390_softc *sc = ifp->if_softc; + + if (sc->sc_enabled == 0) { + ifmr->ifm_active = IFM_ETHER | IFM_NONE; + ifmr->ifm_status = 0; + return; + } + + if (sc->sc_mediastatus) + (*sc->sc_mediastatus)(sc, ifmr); +} + +/* + * Reset interface. + */ +void +dp8390_reset(sc) + struct dp8390_softc *sc; +{ + int s; + + s = splnet(); + dp8390_stop(sc); + dp8390_init(sc); + splx(s); +} + +/* + * Take interface offline. + */ +void +dp8390_stop(sc) + struct dp8390_softc *sc; +{ + bus_space_tag_t regt = sc->sc_regt; + bus_space_handle_t regh = sc->sc_regh; + int n = 5000; + + /* Stop everything on the interface, and select page 0 registers. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); + + /* + * Wait for interface to enter stopped state, but limit # of checks to + * 'n' (about 5ms). It shouldn't even take 5us on modern DS8390's, but + * just in case it's an old one. + */ + while (((NIC_GET(regt, regh, + ED_P0_ISR) & ED_ISR_RST) == 0) && --n) + ; +} + +/* + * Device timeout/watchdog routine. Entered if the device neglects to generate + * an interrupt after a transmit has been started on it. + */ + +void +dp8390_watchdog(ifp) + struct ifnet *ifp; +{ + struct dp8390_softc *sc = ifp->if_softc; + + log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); +#ifdef __NetBSD__ + ++sc->sc_ec.ec_if.if_oerrors; +#else + ++sc->sc_arpcom.ac_if.if_oerrors; +#endif + + dp8390_reset(sc); +} + +/* + * Initialize device. + */ +void +dp8390_init(sc) + struct dp8390_softc *sc; +{ + bus_space_tag_t regt = sc->sc_regt; + bus_space_handle_t regh = sc->sc_regh; +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + u_int8_t mcaf[8]; + int i; + + /* + * Initialize the NIC in the exact order outlined in the NS manual. + * This init procedure is "mandatory"...don't change what or when + * things happen. + */ + + /* Reset transmitter flags. */ + ifp->if_timer = 0; + + sc->txb_inuse = 0; + sc->txb_new = 0; + sc->txb_next_tx = 0; + + /* Set interface for page 0, remote DMA complete, stopped. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); + + if (sc->dcr_reg & ED_DCR_LS) { + NIC_PUT(regt, regh, ED_P0_DCR, sc->dcr_reg); + } else { + /* + * Set FIFO threshold to 8, No auto-init Remote DMA, byte + * order=80x86, byte-wide DMA xfers, + */ + NIC_PUT(regt, regh, ED_P0_DCR, ED_DCR_FT1 | ED_DCR_LS); + } + + /* Clear remote byte count registers. */ + NIC_PUT(regt, regh, ED_P0_RBCR0, 0); + NIC_PUT(regt, regh, ED_P0_RBCR1, 0); + + /* Tell RCR to do nothing for now. */ + NIC_PUT(regt, regh, ED_P0_RCR, ED_RCR_MON); + + /* Place NIC in internal loopback mode. */ + NIC_PUT(regt, regh, ED_P0_TCR, ED_TCR_LB0); + + /* Set lower bits of byte addressable framing to 0. */ + if (sc->is790) + NIC_PUT(regt, regh, 0x09, 0); + + /* Initialize receive buffer ring. */ + NIC_PUT(regt, regh, ED_P0_BNRY, sc->rec_page_start); + NIC_PUT(regt, regh, ED_P0_PSTART, sc->rec_page_start); + NIC_PUT(regt, regh, ED_P0_PSTOP, sc->rec_page_stop); + + /* + * Clear all interrupts. A '1' in each bit position clears the + * corresponding flag. + */ + NIC_PUT(regt, regh, ED_P0_ISR, 0xff); + + /* + * Enable the following interrupts: receive/transmit complete, + * receive/transmit error, and Receiver OverWrite. + * + * Counter overflow and Remote DMA complete are *not* enabled. + */ + NIC_PUT(regt, regh, ED_P0_IMR, + ED_IMR_PRXE | ED_IMR_PTXE | ED_IMR_RXEE | ED_IMR_TXEE | + ED_IMR_OVWE); + + /* Program command register for page 1. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STP); + + /* Copy out our station address. */ + for (i = 0; i < ETHER_ADDR_LEN; ++i) +#ifdef __NetBSD__ + NIC_PUT(regt, regh, ED_P1_PAR0 + i, + LLADDR(ifp->if_sadl)[i]); +#else + NIC_PUT(regt, regh, ED_P1_PAR0 + i, + sc->sc_arpcom.ac_enaddr[i]); +#endif + + /* Set multicast filter on chip. */ +#ifdef __NetBSD__ + dp8390_getmcaf(&sc->sc_ec, mcaf); +#else + dp8390_getmcaf(&sc->sc_arpcom, mcaf); +#endif + for (i = 0; i < 8; i++) + NIC_PUT(regt, regh, ED_P1_MAR0 + i, mcaf[i]); + + /* + * Set current page pointer to one page after the boundary pointer, as + * recommended in the National manual. + */ + sc->next_packet = sc->rec_page_start + 1; + NIC_PUT(regt, regh, ED_P1_CURR, sc->next_packet); + + /* Program command register for page 0. */ + NIC_PUT(regt, regh, ED_P1_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); + + i = ED_RCR_AB | ED_RCR_AM; + if (ifp->if_flags & IFF_PROMISC) { + /* + * Set promiscuous mode. Multicast filter was set earlier so + * that we should receive all multicast packets. + */ + i |= ED_RCR_PRO | ED_RCR_AR | ED_RCR_SEP; + } + NIC_PUT(regt, regh, ED_P0_RCR, i); + + /* Take interface out of loopback. */ + NIC_PUT(regt, regh, ED_P0_TCR, 0); + + /* Do any card-specific initialization, if applicable. */ + if (sc->init_card) + (*sc->init_card)(sc); + + /* Fire up the interface. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); + + /* Set 'running' flag, and clear output active flag. */ + ifp->if_flags |= IFF_RUNNING; + ifp->if_flags &= ~IFF_OACTIVE; + + /* ...and attempt to start output. */ + dp8390_start(ifp); +} + +/* + * This routine actually starts the transmission on the interface. + */ +static __inline__ void +dp8390_xmit(sc) + struct dp8390_softc *sc; +{ + bus_space_tag_t regt = sc->sc_regt; + bus_space_handle_t regh = sc->sc_regh; +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + u_short len; + + len = sc->txb_len[sc->txb_next_tx]; + + /* Set NIC for page 0 register access. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); + + /* Set TX buffer start page. */ + NIC_PUT(regt, regh, ED_P0_TPSR, sc->tx_page_start + + sc->txb_next_tx * ED_TXBUF_SIZE); + + /* Set TX length. */ + NIC_PUT(regt, regh, ED_P0_TBCR0, len); + NIC_PUT(regt, regh, ED_P0_TBCR1, len >> 8); + + /* Set page 0, remote DMA complete, transmit packet, and *start*. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); + + /* Point to next transmit buffer slot and wrap if necessary. */ + sc->txb_next_tx++; + if (sc->txb_next_tx == sc->txb_cnt) + sc->txb_next_tx = 0; + + /* Set a timer just in case we never hear from the board again. */ + ifp->if_timer = 2; +} + +/* + * Start output on interface. + * We make two assumptions here: + * 1) that the current priority is set to splnet _before_ this code + * is called *and* is returned to the appropriate priority after + * return + * 2) that the IFF_OACTIVE flag is checked before this code is called + * (i.e. that the output part of the interface is idle) + */ +void +dp8390_start(ifp) + struct ifnet *ifp; +{ + struct dp8390_softc *sc = ifp->if_softc; + struct mbuf *m0; + int buffer; + int len; + + if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) + return; + +outloop: + /* See if there is room to put another packet in the buffer. */ + if (sc->txb_inuse == sc->txb_cnt) { + /* No room. Indicate this to the outside world and exit. */ + ifp->if_flags |= IFF_OACTIVE; + return; + } + IF_DEQUEUE(&ifp->if_snd, m0); + if (m0 == 0) + return; + + /* We need to use m->m_pkthdr.len, so require the header */ + if ((m0->m_flags & M_PKTHDR) == 0) + panic("dp8390_start: no header mbuf"); + +#if NBPFILTER > 0 + /* Tap off here if there is a BPF listener. */ + if (ifp->if_bpf) + bpf_mtap(ifp->if_bpf, m0); +#endif + + /* txb_new points to next open buffer slot. */ + buffer = sc->mem_start + + ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); + + if (sc->write_mbuf) + len = (*sc->write_mbuf)(sc, m0, buffer); + else + len = dp8390_write_mbuf(sc, m0, buffer); + + m_freem(m0); + sc->txb_len[sc->txb_new] = max(len, ETHER_MIN_LEN); + + /* Start the first packet transmitting. */ + if (sc->txb_inuse == 0) + dp8390_xmit(sc); + + /* Point to next buffer slot and wrap if necessary. */ + if (++sc->txb_new == sc->txb_cnt) + sc->txb_new = 0; + + sc->txb_inuse++; + + /* Loop back to the top to possibly buffer more packets. */ + goto outloop; +} + +/* + * Ethernet interface receiver interrupt. + */ +void +dp8390_rint(sc) + struct dp8390_softc *sc; +{ + bus_space_tag_t regt = sc->sc_regt; + bus_space_handle_t regh = sc->sc_regh; + struct dp8390_ring packet_hdr; + int packet_ptr; + u_short len; + u_char boundary, current; + u_char nlen; + +loop: + /* Set NIC to page 1 registers to get 'current' pointer. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_1 | ED_CR_STA); + + /* + * 'sc->next_packet' is the logical beginning of the ring-buffer - i.e. + * it points to where new data has been buffered. The 'CURR' (current) + * register points to the logical end of the ring-buffer - i.e. it + * points to where additional new data will be added. We loop here + * until the logical beginning equals the logical end (or in other + * words, until the ring-buffer is empty). + */ + current = NIC_GET(regt, regh, ED_P1_CURR); + if (sc->next_packet == current) + return; + + /* Set NIC to page 0 registers to update boundary register. */ + NIC_PUT(regt, regh, ED_P1_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); + + do { + /* Get pointer to this buffer's header structure. */ + packet_ptr = sc->mem_ring + + ((sc->next_packet - sc->rec_page_start) << ED_PAGE_SHIFT); + + if (sc->read_hdr) + (*sc->read_hdr)(sc, packet_ptr, &packet_hdr); + else + dp8390_read_hdr(sc, packet_ptr, &packet_hdr); + len = packet_hdr.count; + + /* + * Try do deal with old, buggy chips that sometimes duplicate + * the low byte of the length into the high byte. We do this + * by simply ignoring the high byte of the length and always + * recalculating it. + * + * NOTE: sc->next_packet is pointing at the current packet. + */ + if (packet_hdr.next_packet >= sc->next_packet) + nlen = (packet_hdr.next_packet - sc->next_packet); + else + nlen = ((packet_hdr.next_packet - sc->rec_page_start) + + (sc->rec_page_stop - sc->next_packet)); + --nlen; + if ((len & ED_PAGE_MASK) + sizeof(packet_hdr) > ED_PAGE_SIZE) + --nlen; + len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); +#ifdef DIAGNOSTIC + if (len != packet_hdr.count) { + printf("%s: length does not match " + "next packet pointer\n", sc->sc_dev.dv_xname); + printf("%s: len %04x nlen %04x start %02x " + "first %02x curr %02x next %02x stop %02x\n", + sc->sc_dev.dv_xname, packet_hdr.count, len, + sc->rec_page_start, sc->next_packet, current, + packet_hdr.next_packet, sc->rec_page_stop); + } +#endif + + /* + * Be fairly liberal about what we allow as a "reasonable" + * length so that a [crufty] packet will make it to BPF (and + * can thus be analyzed). Note that all that is really + * important is that we have a length that will fit into one + * mbuf cluster or less; the upper layer protocols can then + * figure out the length from their own length field(s). + */ + if (len <= MCLBYTES && + packet_hdr.next_packet >= sc->rec_page_start && + packet_hdr.next_packet < sc->rec_page_stop) { + /* Go get packet. */ + dp8390_read(sc, + packet_ptr + sizeof(struct dp8390_ring), + len - sizeof(struct dp8390_ring)); +#ifdef __NetBSD__ + ++sc->sc_ec.ec_if.if_ipackets; +#else + ++sc->sc_arpcom.ac_if.if_ipackets; +#endif + } else { + /* Really BAD. The ring pointers are corrupted. */ + log(LOG_ERR, "%s: NIC memory corrupt - " + "invalid packet length %d\n", + sc->sc_dev.dv_xname, len); +#ifdef __NetBSD__ + ++sc->sc_ec.ec_if.if_ierrors; +#else + ++sc->sc_arpcom.ac_if.if_ierrors; +#endif + dp8390_reset(sc); + return; + } + + /* Update next packet pointer. */ + sc->next_packet = packet_hdr.next_packet; + + /* + * Update NIC boundary pointer - being careful to keep it one + * buffer behind (as recommended by NS databook). + */ + boundary = sc->next_packet - 1; + if (boundary < sc->rec_page_start) + boundary = sc->rec_page_stop - 1; + NIC_PUT(regt, regh, ED_P0_BNRY, boundary); + } while (sc->next_packet != current); + + goto loop; +} + +/* Ethernet interface interrupt processor. */ +int +dp8390_intr(arg) + void *arg; +{ + struct dp8390_softc *sc = (struct dp8390_softc *)arg; + bus_space_tag_t regt = sc->sc_regt; + bus_space_handle_t regh = sc->sc_regh; +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + u_char isr; + + if (sc->sc_enabled == 0) + return (0); + + /* Set NIC to page 0 registers. */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); + + isr = NIC_GET(regt, regh, ED_P0_ISR); + if (!isr) + return (0); + + /* Loop until there are no more new interrupts. */ + for (;;) { + /* + * Reset all the bits that we are 'acknowledging' by writing a + * '1' to each bit position that was set. + * (Writing a '1' *clears* the bit.) + */ + NIC_PUT(regt, regh, ED_P0_ISR, isr); + + /* + * Handle transmitter interrupts. Handle these first because + * the receiver will reset the board under some conditions. + */ + if (isr & (ED_ISR_PTX | ED_ISR_TXE)) { + u_char collisions = NIC_GET(regt, regh, + ED_P0_NCR) & 0x0f; + + /* + * Check for transmit error. If a TX completed with an + * error, we end up throwing the packet away. Really + * the only error that is possible is excessive + * collisions, and in this case it is best to allow the + * automatic mechanisms of TCP to backoff the flow. Of + * course, with UDP we're screwed, but this is expected + * when a network is heavily loaded. + */ + (void)NIC_GET(regt, regh, ED_P0_TSR); + if (isr & ED_ISR_TXE) { + /* + * Excessive collisions (16). + */ + if ((NIC_GET(regt, regh, ED_P0_TSR) + & ED_TSR_ABT) && (collisions == 0)) { + /* + * When collisions total 16, the P0_NCR + * will indicate 0, and the TSR_ABT is + * set. + */ + collisions = 16; + } + + /* Update output errors counter. */ + ++ifp->if_oerrors; + } else { + /* + * Update total number of successfully + * transmitted packets. + */ + ++ifp->if_opackets; + } + + /* Done with the buffer. */ + sc->txb_inuse--; + + /* Clear watchdog timer. */ + ifp->if_timer = 0; + ifp->if_flags &= ~IFF_OACTIVE; + + /* + * Add in total number of collisions on last + * transmission. + */ + ifp->if_collisions += collisions; + + /* + * Decrement buffer in-use count if not zero (can only + * be zero if a transmitter interrupt occured while not + * actually transmitting). + * If data is ready to transmit, start it transmitting, + * otherwise defer until after handling receiver. + */ + if (sc->txb_inuse > 0) + dp8390_xmit(sc); + } + + /* Handle receiver interrupts. */ + if (isr & (ED_ISR_PRX | ED_ISR_RXE | ED_ISR_OVW)) { + /* + * Overwrite warning. In order to make sure that a + * lockup of the local DMA hasn't occurred, we reset + * and re-init the NIC. The NSC manual suggests only a + * partial reset/re-init is necessary - but some chips + * seem to want more. The DMA lockup has been seen + * only with early rev chips - Methinks this bug was + * fixed in later revs. -DG + */ + if (isr & ED_ISR_OVW) { + ++ifp->if_ierrors; +#ifdef DIAGNOSTIC + log(LOG_WARNING, "%s: warning - receiver " + "ring buffer overrun\n", + sc->sc_dev.dv_xname); +#endif + /* Stop/reset/re-init NIC. */ + dp8390_reset(sc); + } else { + /* + * Receiver Error. One or more of: CRC error, + * frame alignment error FIFO overrun, or + * missed packet. + */ + if (isr & ED_ISR_RXE) { + ++ifp->if_ierrors; +#ifdef DEBUG + if (dp8390_debug) { + printf("%s: receive error %x\n", + sc->sc_dev.dv_xname, + NIC_GET(regt, regh, + ED_P0_RSR)); + } +#endif + } + + /* + * Go get the packet(s) + * XXX - Doing this on an error is dubious + * because there shouldn't be any data to get + * (we've configured the interface to not + * accept packets with errors). + */ + if (sc->recv_int) + (*sc->recv_int)(sc); + else + dp8390_rint(sc); + } + } + + /* + * If it looks like the transmitter can take more data, attempt + * to start output on the interface. This is done after + * handling the receiver to give the receiver priority. + */ + dp8390_start(ifp); + + /* + * Return NIC CR to standard state: page 0, remote DMA + * complete, start (toggling the TXP bit off, even if was just + * set in the transmit routine, is *okay* - it is 'edge' + * triggered from low to high). + */ + NIC_PUT(regt, regh, ED_P0_CR, + sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); + + /* + * If the Network Talley Counters overflow, read them to reset + * them. It appears that old 8390's won't clear the ISR flag + * otherwise - resulting in an infinite loop. + */ + if (isr & ED_ISR_CNT) { + (void)NIC_GET(regt, regh, ED_P0_CNTR0); + (void)NIC_GET(regt, regh, ED_P0_CNTR1); + (void)NIC_GET(regt, regh, ED_P0_CNTR2); + } + + isr = NIC_GET(regt, regh, ED_P0_ISR); + if (!isr) + return (1); + } +} + +/* + * Process an ioctl request. This code needs some work - it looks pretty ugly. + */ +int +dp8390_ioctl(ifp, cmd, data) + struct ifnet *ifp; + u_long cmd; + caddr_t data; +{ + struct dp8390_softc *sc = ifp->if_softc; + struct ifaddr *ifa = (struct ifaddr *) data; + struct ifreq *ifr = (struct ifreq *) data; + int s, error = 0; + + s = splnet(); + + switch (cmd) { + + case SIOCSIFADDR: + if ((error = dp8390_enable(sc)) != 0) + break; + ifp->if_flags |= IFF_UP; + + switch (ifa->ifa_addr->sa_family) { +#ifdef INET + case AF_INET: + dp8390_init(sc); +#ifdef __NetBSD__ + arp_ifinit(ifp, ifa); +#else + arp_ifinit(&sc->sc_arpcom, ifa); +#endif + break; +#endif +#ifdef NS + /* XXX - This code is probably wrong. */ + 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), + ETHER_ADDR_LEN); + /* Set new address. */ + dp8390_init(sc); + break; + } +#endif + default: + dp8390_init(sc); + break; + } + break; + + case SIOCSIFFLAGS: + if ((ifp->if_flags & IFF_UP) == 0 && + (ifp->if_flags & IFF_RUNNING) != 0) { + /* + * If interface is marked down and it is running, then + * stop it. + */ + dp8390_stop(sc); + ifp->if_flags &= ~IFF_RUNNING; + dp8390_disable(sc); + } else if ((ifp->if_flags & IFF_UP) != 0 && + (ifp->if_flags & IFF_RUNNING) == 0) { + /* + * If interface is marked up and it is stopped, then + * start it. + */ + if ((error = dp8390_enable(sc)) != 0) + break; + dp8390_init(sc); + } else if (sc->sc_enabled) { + /* + * Reset the interface to pick up changes in any other + * flags that affect hardware registers. + */ + dp8390_stop(sc); + dp8390_init(sc); + } + break; + + case SIOCADDMULTI: + case SIOCDELMULTI: + if (sc->sc_enabled == 0) { + error = EIO; + break; + } + + /* Update our multicast list. */ + error = (cmd == SIOCADDMULTI) ? +#ifdef __NetBSD__ + ether_addmulti(ifr, &sc->sc_ec) : + ether_delmulti(ifr, &sc->sc_ec); +#else + ether_addmulti(ifr, &sc->sc_arpcom) : + ether_delmulti(ifr, &sc->sc_arpcom); +#endif + + if (error == ENETRESET) { + /* + * Multicast list has changed; set the hardware filter + * accordingly. + */ + dp8390_stop(sc); /* XXX for ds_setmcaf? */ + dp8390_init(sc); + error = 0; + } + break; + + case SIOCGIFMEDIA: + case SIOCSIFMEDIA: + error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); + break; + + default: + error = EINVAL; + break; + } + + splx(s); + return (error); +} + +/* + * Retrieve packet from buffer memory and send to the next level up via + * ether_input(). If there is a BPF listener, give a copy to BPF, too. + */ +void +dp8390_read(sc, buf, len) + struct dp8390_softc *sc; + int buf; + u_short len; +{ +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + struct mbuf *m; + struct ether_header *eh; + + /* Pull packet off interface. */ + m = dp8390_get(sc, buf, len); + if (m == 0) { + ifp->if_ierrors++; + return; + } + + ifp->if_ipackets++; + + /* We assume that the header fits entirely in one mbuf. */ + eh = mtod(m, struct ether_header *); + +#if NBPFILTER > 0 + /* + * Check if there's a BPF listener on this interface. + * If so, hand off the raw packet to bpf. + */ + if (ifp->if_bpf) { + bpf_mtap(ifp->if_bpf, m); + + /* + * 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. + */ + if ((ifp->if_flags & IFF_PROMISC) && + (eh->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */ +#ifdef __NetBSD__ + bcmp(eh->ether_dhost, LLADDR(ifp->if_sadl), +#else + bcmp(eh->ether_dhost, sc->sc_arpcom.ac_enaddr, +#endif + sizeof(eh->ether_dhost)) != 0) { + m_freem(m); + return; + } + } +#endif + + /* Fix up data start offset in mbuf to point past ether header. */ + m_adj(m, sizeof(struct ether_header)); + ether_input(ifp, eh, m); +} + + +/* + * Supporting routines. + */ + +/* + * Compute the multicast address filter from the list of multicast addresses we + * need to listen to. + */ +void +dp8390_getmcaf(ec, af) +#ifdef __NetBSD__ + struct ethercom *ec; +#else + struct arpcom *ec; +#endif + u_int8_t *af; +{ +#ifdef __NetBSD__ + struct ifnet *ifp = &ec->ec_if; +#else + struct ifnet *ifp = &ec->ac_if; +#endif + struct ether_multi *enm; + u_int8_t *cp, c; + u_int32_t crc; + int i, len; + struct ether_multistep step; + + /* + * Set up multicast address filter by passing all multicast addresses + * through a crc generator, and then using the high order 6 bits as an + * index into the 64 bit logical address filter. The high order bit + * selects the word, while the rest of the bits select the bit within + * the word. + */ + + if (ifp->if_flags & IFF_PROMISC) { + ifp->if_flags |= IFF_ALLMULTI; + for (i = 0; i < 8; i++) + af[i] = 0xff; + return; + } + for (i = 0; i < 8; i++) + af[i] = 0; + ETHER_FIRST_MULTI(step, ec, enm); + while (enm != NULL) { + if (bcmp(enm->enm_addrlo, enm->enm_addrhi, + sizeof(enm->enm_addrlo)) != 0) { + /* + * We must listen to a range of multicast addresses. + * For now, just accept all multicasts, rather than + * trying to set only those filter bits needed to match + * the range. (At this time, the only use of address + * ranges is for IP multicast routing, for which the + * range is big enough to require all bits set.) + */ + ifp->if_flags |= IFF_ALLMULTI; + for (i = 0; i < 8; i++) + af[i] = 0xff; + return; + } + cp = enm->enm_addrlo; + crc = 0xffffffff; + for (len = sizeof(enm->enm_addrlo); --len >= 0;) { + c = *cp++; + for (i = 8; --i >= 0;) { + if (((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01)) { + crc <<= 1; + crc ^= 0x04c11db6 | 1; + } else + crc <<= 1; + c >>= 1; + } + } + /* Just want the 6 most significant bits. */ + crc >>= 26; + + /* Turn on the corresponding bit in the filter. */ + af[crc >> 3] |= 1 << (crc & 0x7); + + ETHER_NEXT_MULTI(step, enm); + } + ifp->if_flags &= ~IFF_ALLMULTI; +} + +/* + * Copy data from receive buffer to end of mbuf chain allocate additional mbufs + * as needed. Return pointer to last mbuf in chain. + * sc = dp8390 info (softc) + * src = pointer in dp8390 ring buffer + * dst = pointer to last mbuf in mbuf chain to copy to + * amount = amount of data to copy + */ +struct mbuf * +dp8390_get(sc, src, total_len) + struct dp8390_softc *sc; + int src; + u_short total_len; +{ +#ifdef __NetBSD__ + struct ifnet *ifp = &sc->sc_ec.ec_if; +#else + struct ifnet *ifp = &sc->sc_arpcom.ac_if; +#endif + struct mbuf *top, **mp, *m; + u_short len; + + MGETHDR(m, M_DONTWAIT, MT_DATA); + if (m == 0) + return 0; + m->m_pkthdr.rcvif = ifp; + m->m_pkthdr.len = total_len; + len = MHLEN; + top = 0; + mp = ⊤ + + while (total_len > 0) { + if (top) { + MGET(m, M_DONTWAIT, MT_DATA); + if (m == 0) { + m_freem(top); + return 0; + } + len = MLEN; + } + if (total_len >= MINCLSIZE) { + MCLGET(m, M_DONTWAIT); + if ((m->m_flags & M_EXT) == 0) { + m_freem(m); + m_freem(top); + return 0; + } + len = MCLBYTES; + } + + /* + * Make sure the data after the Ethernet header is aligned. + */ + if (top == NULL) { + caddr_t newdata = (caddr_t) + ALIGN(m->m_data + sizeof(struct ether_header)) - + sizeof(struct ether_header); + len -= newdata - m->m_data; + m->m_data = newdata; + } + + m->m_len = len = min(total_len, len); + if (sc->ring_copy) + src = (*sc->ring_copy)(sc, src, mtod(m, caddr_t), len); + else + src = dp8390_ring_copy(sc, src, mtod(m, caddr_t), len); + total_len -= len; + *mp = m; + mp = &m->m_next; + } + + return top; +} + + +/* + * Default driver support functions. + * + * NOTE: all support functions assume 8-bit shared memory. + */ +/* + * Zero NIC buffer memory and verify that it is clear. + */ +static int +dp8390_test_mem(sc) + struct dp8390_softc *sc; +{ + bus_space_tag_t buft = sc->sc_buft; + bus_space_handle_t bufh = sc->sc_bufh; + int i; + + bus_space_set_region_1(buft, bufh, sc->mem_start, 0, sc->mem_size); + + for (i = 0; i < sc->mem_size; ++i) { + if (bus_space_read_1(buft, bufh, sc->mem_start + i)) { + printf(": failed to clear NIC buffer at offset %x - " + "check configuration\n", (sc->mem_start + i)); + return 1; + } + } + + return 0; +} + +/* + * Read a packet header from the ring, given the source offset. + */ +static __inline__ void +dp8390_read_hdr(sc, src, hdrp) + struct dp8390_softc *sc; + int src; + struct dp8390_ring *hdrp; +{ + bus_space_tag_t buft = sc->sc_buft; + bus_space_handle_t bufh = sc->sc_bufh; + + /* + * The byte count includes a 4 byte header that was added by + * the NIC. + */ + hdrp->rsr = bus_space_read_1(buft, bufh, src); + hdrp->next_packet = bus_space_read_1(buft, bufh, src + 1); + hdrp->count = bus_space_read_1(buft, bufh, src + 2) | + (bus_space_read_1(buft, bufh, src + 3) << 8); +} + +/* + * Copy `amount' bytes from a packet in the ring buffer to a linear + * destination buffer, given a source offset and destination address. + * Takes into account ring-wrap. + */ +static __inline__ int +dp8390_ring_copy(sc, src, dst, amount) + struct dp8390_softc *sc; + int src; + caddr_t dst; + u_short amount; +{ + bus_space_tag_t buft = sc->sc_buft; + bus_space_handle_t bufh = sc->sc_bufh; + u_short tmp_amount; + + /* Does copy wrap to lower addr in ring buffer? */ + if (src + amount > sc->mem_end) { + tmp_amount = sc->mem_end - src; + + /* Copy amount up to end of NIC memory. */ + bus_space_read_region_1(buft, bufh, src, dst, tmp_amount); + + amount -= tmp_amount; + src = sc->mem_ring; + dst += tmp_amount; + } + bus_space_read_region_1(buft, bufh, src, dst, amount); + + return (src + amount); +} + +/* + * Copy a packet from an mbuf to the transmit buffer on the card. + * + * Currently uses an extra buffer/extra memory copy, unless the whole + * packet fits in one mbuf. + */ +static __inline__ int +dp8390_write_mbuf(sc, m, buf) + struct dp8390_softc *sc; + struct mbuf *m; + int buf; +{ + bus_space_tag_t buft = sc->sc_buft; + bus_space_handle_t bufh = sc->sc_bufh; + u_char *data; + int len, totlen = 0; + + for (; m ; m = m->m_next) { + data = mtod(m, u_char *); + len = m->m_len; + if (len > 0) { + bus_space_write_region_1(buft, bufh, buf, data, len); + totlen += len; + buf += len; + } + } + + return (totlen); +} + +/* + * Enable power on the interface. + */ +int +dp8390_enable(sc) + struct dp8390_softc *sc; +{ + + if (sc->sc_enabled == 0 && sc->sc_enable != NULL) { + if ((*sc->sc_enable)(sc) != 0) { + printf("%s: device enable failed\n", + sc->sc_dev.dv_xname); + return (EIO); + } + } + + sc->sc_enabled = 1; + return (0); +} + +/* + * Disable power on the interface. + */ +void +dp8390_disable(sc) + struct dp8390_softc *sc; +{ + + if (sc->sc_enabled != 0 && sc->sc_disable != NULL) { + (*sc->sc_disable)(sc); + sc->sc_enabled = 0; + } +} |