diff options
Diffstat (limited to 'sys/arch/amiga/dev/if_ed.c')
| -rw-r--r-- | sys/arch/amiga/dev/if_ed.c | 1241 |
1 files changed, 0 insertions, 1241 deletions
diff --git a/sys/arch/amiga/dev/if_ed.c b/sys/arch/amiga/dev/if_ed.c deleted file mode 100644 index 27f9554c598..00000000000 --- a/sys/arch/amiga/dev/if_ed.c +++ /dev/null @@ -1,1241 +0,0 @@ -/* $OpenBSD: if_ed.c,v 1.14 2002/03/14 01:26:29 millert Exp $ */ -/* $NetBSD: if_ed.c,v 1.26 1997/03/17 17:51:42 is 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. - * - * Currently supports the Hydra Systems and ASDG ethernet cards. - */ - -#include "bpfilter.h" - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/errno.h> -#include <sys/ioctl.h> -#include <sys/mbuf.h> -#include <sys/socket.h> -#include <sys/syslog.h> -#include <sys/device.h> - -#include <net/if.h> -#include <net/if_dl.h> -#include <net/if_types.h> -#include <net/netisr.h> - -#ifdef INET -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/in_var.h> -#include <netinet/ip.h> -#include <netinet/if_ether.h> -#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/cpu.h> -#include <machine/mtpr.h> - -#include <amiga/amiga/device.h> -#include <amiga/amiga/isr.h> -#include <amiga/dev/zbusvar.h> -#include <dev/ic/dp8390reg.h> -#include <amiga/dev/if_edreg.h> - -#define HYDRA_MANID 2121 -#define HYDRA_PRODID 1 - -#define ASDG_MANID 1023 -#define ASDG_PRODID 254 - -/* - * ed_softc: per line info and status - */ -struct ed_softc { - struct device sc_dev; - struct isr sc_isr; - - struct arpcom sc_arpcom; /* ethernet common */ - - u_char volatile *nic_addr; /* NIC (DS8390) I/O address */ - - u_char cr_proto; /* values always set in CR */ - - caddr_t mem_start; /* NIC memory start address */ - caddr_t mem_end; /* NIC memory end address */ - u_long mem_size; /* total NIC memory size */ - caddr_t mem_ring; /* start of RX ring-buffer (in NIC mem) */ - - u_char xmit_busy; /* transmitter is busy */ - u_char txb_cnt; /* number of transmit buffers */ - u_char txb_inuse; /* number of TX buffers currently in-use*/ - - u_char txb_new; /* pointer to where new buffer will be added */ - u_char txb_next_tx; /* pointer to next buffer ready to xmit */ - u_short txb_len[8]; /* buffered xmit buffer lengths */ - u_char tx_page_start; /* first page of TX buffer area */ - u_char rec_page_start; /* first page of RX ring-buffer */ - u_char rec_page_stop; /* last page of RX ring-buffer */ - u_char next_packet; /* pointer to next unread RX packet */ -}; - -int ed_zbus_match(struct device *, void *, void *); -void ed_zbus_attach(struct device *, struct device *, void *); -int edintr(void *); -int ed_ioctl(struct ifnet *, u_long, caddr_t); -void ed_start(struct ifnet *); -void ed_watchdog(struct ifnet *); -void ed_reset(struct ed_softc *); -void ed_init(struct ed_softc *); -void ed_stop(struct ed_softc *); -void ed_getmcaf(struct arpcom *, u_long *); -u_short ed_put(struct ed_softc *, struct mbuf *, caddr_t); - -#define inline /* XXX for debugging purposes */ - -void ed_get_packet(struct ed_softc *, caddr_t, u_short); -static inline void ed_rint(struct ed_softc *); -static inline void ed_xmit(struct ed_softc *); -static inline caddr_t ed_ring_copy(struct ed_softc *, caddr_t, caddr_t, - u_short); - -static inline void NIC_PUT(struct ed_softc *, int, u_char); -static inline u_char NIC_GET(struct ed_softc *, int); -static inline void word_copy(caddr_t, caddr_t, int); -struct mbuf *ed_ring_to_mbuf(struct ed_softc *, caddr_t, struct mbuf *, u_short); - -struct cfattach ed_zbus_ca = { - sizeof(struct ed_softc), ed_zbus_match, ed_zbus_attach -}; - -struct cfdriver ed_cd = { - NULL, "ed", DV_IFNET -}; - -#define ETHER_MIN_LEN 64 -#define ETHER_MAX_LEN 1518 -#define ETHER_ADDR_LEN 6 - -static inline void -NIC_PUT(sc, off, val) - struct ed_softc *sc; - int off; - u_char val; -{ - sc->nic_addr[off * 2] = val; -#ifdef not_def - /* - * This was being used to *slow* access to the bus. I don't - * believe it is needed but I'll leave it around incase probelms - * pop-up - */ - (void)ciaa.pra; -#endif -} - -static inline u_char -NIC_GET(sc, off) - struct ed_softc *sc; - int off; -{ - register u_char val; - - val = sc->nic_addr[off * 2]; -#ifdef not_def - /* - * This was being used to *slow* access to the bus. I don't - * believe it is needed but I'll leave it around incase probelms - * pop-up - */ - (void)ciaa.pra; -#endif - return (val); -} - -/* - * Memory copy, copies word at time. - */ -static inline void -word_copy(a, b, len) - caddr_t a, b; - int len; -{ - u_short *x = (u_short *)a, - *y = (u_short *)b; - - len >>= 1; - while (len--) - *y++ = *x++; -} - -int -ed_zbus_match(parent, match, aux) - struct device *parent; - void *match, *aux; -{ - struct zbus_args *zap = aux; - - if (zap->manid == HYDRA_MANID && zap->prodid == HYDRA_PRODID) - return (1); - else if (zap->manid == ASDG_MANID && zap->prodid == ASDG_PRODID) - return (1); - return (0); -} - -void -ed_zbus_attach(parent, self, aux) - struct device *parent, *self; - void *aux; -{ - struct ed_softc *sc = (void *)self; - struct zbus_args *zap = aux; - struct cfdata *cf = sc->sc_dev.dv_cfdata; - struct ifnet *ifp = &sc->sc_arpcom.ac_if; - u_char *prom; - int i; - - if (zap->manid == HYDRA_MANID) { - sc->mem_start = zap->va; - sc->mem_size = 16384; - sc->nic_addr = sc->mem_start + HYDRA_NIC_BASE; - prom = (u_char *)sc->mem_start + HYDRA_ADDRPROM; - } else { - sc->mem_start = zap->va + 0x8000; - sc->mem_size = 16384; - sc->nic_addr = zap->va + ASDG_NIC_BASE; - prom = (u_char *)sc->nic_addr + ASDG_ADDRPROM; - } - sc->cr_proto = ED_CR_RD2; - sc->tx_page_start = 0; - - sc->mem_end = sc->mem_start + sc->mem_size; - - /* - * Use one xmit buffer if < 16k, two buffers otherwise (if not told - * otherwise). - */ - if ((sc->mem_size < 16384) || zap->manid == ASDG_MANID - || (cf->cf_flags & ED_FLAGS_NO_MULTI_BUFFERING)) - sc->txb_cnt = 1; - else - sc->txb_cnt = 2; - - 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->txb_cnt * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); - - /* - * Interupts must be inactive when reading the prom, as the interupt - * line is shared with one of its address lines. - */ - - NIC_PUT(sc, ED_P0_IMR, 0x00); /* disable ints */ - NIC_PUT(sc, ED_P0_ISR, 0xff); /* clear ints */ - - /* - * read the ethernet address from the board - */ - for (i = 0; i < ETHER_ADDR_LEN; i++) - sc->sc_arpcom.ac_enaddr[i] = *(prom + 2 * i); - - /* Set interface to stopped condition (reset). */ - ed_stop(sc); - - /* Initialize ifnet structure. */ - bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ); - ifp->if_softc = sc; - ifp->if_start = ed_start; - ifp->if_ioctl = ed_ioctl; - ifp->if_watchdog = ed_watchdog; - ifp->if_flags = - IFF_BROADCAST | IFF_SIMPLEX | IFF_NOTRAILERS | IFF_MULTICAST; - - /* Attach the interface. */ - if_attach(ifp); - ether_ifattach(ifp); - - /* Print additional info when attached. */ - printf(": address %s\n", ether_sprintf(sc->sc_arpcom.ac_enaddr)); - - sc->sc_isr.isr_intr = edintr; - sc->sc_isr.isr_arg = sc; - sc->sc_isr.isr_ipl = 2; - add_isr(&sc->sc_isr); -} - -/* - * Reset interface. - */ -void -ed_reset(sc) - struct ed_softc *sc; -{ - int s; - - s = splnet(); - ed_stop(sc); - ed_init(sc); - splx(s); - log(LOG_ERR, "%s: reset\n", sc->sc_dev.dv_xname); -} - -/* - * Take interface offline. - */ -void -ed_stop(sc) - struct ed_softc *sc; -{ - int n = 5000; - - /* Stop everything on the interface, and select page 0 registers. */ - NIC_PUT(sc, 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(sc, 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 -ed_watchdog(ifp) - struct ifnet *ifp; -{ - struct ed_softc *sc = ifp->if_softc; - - log(LOG_ERR, "%s: device timeout\n", sc->sc_dev.dv_xname); - ++sc->sc_arpcom.ac_if.if_oerrors; - - ed_reset(sc); -} - -/* - * Initialize device. - */ -void -ed_init(sc) - struct ed_softc *sc; -{ - struct ifnet *ifp = &sc->sc_arpcom.ac_if; - int i, s; - u_long mcaf[2]; - - /* - * 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. - */ - s = splnet(); - - /* Reset transmitter flags. */ - sc->xmit_busy = 0; - sc->sc_arpcom.ac_if.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(sc, ED_P0_CR, sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STP); - - /* - * Set FIFO threshold to 8, No auto-init Remote DMA, byte - * order=68k, word-wide DMA xfers, - * XXX changed to use 2 word threshhold - */ - NIC_PUT(sc, ED_P0_DCR, - ED_DCR_FT0 | ED_DCR_WTS | ED_DCR_LS | ED_DCR_BOS); - - /* Clear remote byte count registers. */ - NIC_PUT(sc, ED_P0_RBCR0, 0); - NIC_PUT(sc, ED_P0_RBCR1, 0); - - /* Tell RCR to do nothing for now. */ - NIC_PUT(sc, ED_P0_RCR, ED_RCR_MON); - - /* Place NIC in internal loopback mode. */ - NIC_PUT(sc, ED_P0_TCR, ED_TCR_LB0); - - /* Initialize receive buffer ring. */ - NIC_PUT(sc, ED_P0_BNRY, sc->rec_page_start); - NIC_PUT(sc, ED_P0_PSTART, sc->rec_page_start); - NIC_PUT(sc, ED_P0_PSTOP, sc->rec_page_stop); - - /* - * Clear all interrupts. A '1' in each bit position clears the - * corresponding flag. - */ - NIC_PUT(sc, 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(sc, 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(sc, 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) - NIC_PUT(sc, ED_P1_PAR0 + i, sc->sc_arpcom.ac_enaddr[i]); - - /* Set multicast filter on chip. */ - ed_getmcaf(&sc->sc_arpcom, mcaf); - for (i = 0; i < 8; i++) - NIC_PUT(sc, ED_P1_MAR0 + i, ((u_char *)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(sc, ED_P1_CURR, sc->next_packet); - - /* Program command register for page 0. */ - NIC_PUT(sc, 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(sc, ED_P0_RCR, i); - - /* Take interface out of loopback. */ - NIC_PUT(sc, ED_P0_TCR, 0); - - /* Fire up the interface. */ - NIC_PUT(sc, 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. */ - ed_start(ifp); - - splx(s); -} - -/* - * This routine actually starts the transmission on the interface. - */ -static inline void -ed_xmit(sc) - struct ed_softc *sc; -{ - struct ifnet *ifp = &sc->sc_arpcom.ac_if; - u_short len; - - len = sc->txb_len[sc->txb_next_tx]; - - /* Set NIC for page 0 register access. */ - NIC_PUT(sc, ED_P0_CR, sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); - - /* Set TX buffer start page. */ - NIC_PUT(sc, ED_P0_TPSR, sc->tx_page_start + - sc->txb_next_tx * ED_TXBUF_SIZE); - - /* Set TX length. */ - NIC_PUT(sc, ED_P0_TBCR0, len); - NIC_PUT(sc, ED_P0_TBCR1, len >> 8); - - /* Set page 0, remote DMA complete, transmit packet, and *start*. */ - NIC_PUT(sc, ED_P0_CR, sc->cr_proto | ED_CR_PAGE_0 | ED_CR_TXP | ED_CR_STA); - sc->xmit_busy = 1; - - /* 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 -ed_start(ifp) - struct ifnet *ifp; -{ - struct ed_softc *sc = ifp->if_softc; - struct mbuf *m0, *m; - caddr_t buffer; - int len; - -outloop: - /* - * First, see if there are buffered packets and an idle transmitter - - * should never happen at this point. - */ - if (sc->txb_inuse && (sc->xmit_busy == 0)) { - printf("%s: packets buffered, but transmitter idle\n", - sc->sc_dev.dv_xname); - ed_xmit(sc); - } - - /* 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(&sc->sc_arpcom.ac_if.if_snd, m); - if (m == 0) { - /* - * We are using the !OACTIVE flag to indicate to the outside - * world that we can accept an additional packet rather than - * that the transmitter is _actually_ active. Indeed, the - * transmitter may be active, but if we haven't filled all the - * buffers with data then we still want to accept more. - */ - ifp->if_flags &= ~IFF_OACTIVE; - return; - } - - /* Copy the mbuf chain into the transmit buffer. */ - m0 = m; - - /* txb_new points to next open buffer slot. */ - buffer = sc->mem_start + ((sc->txb_new * ED_TXBUF_SIZE) << ED_PAGE_SHIFT); - - len = ed_put(sc, m, buffer); - - sc->txb_len[sc->txb_new] = max(len, ETHER_MIN_LEN); - sc->txb_inuse++; - - /* Point to next buffer slot and wrap if necessary. */ - if (++sc->txb_new == sc->txb_cnt) - sc->txb_new = 0; - - if (sc->xmit_busy == 0) - ed_xmit(sc); - -#if NBPFILTER > 0 - /* Tap off here if there is a BPF listener. */ - if (sc->sc_arpcom.ac_if.if_bpf) - bpf_mtap(sc->sc_arpcom.ac_if.if_bpf, m0); -#endif - - m_freem(m0); - - /* Loop back to the top to possibly buffer more packets. */ - goto outloop; -} - -/* - * Ethernet interface receiver interrupt. - */ -static inline void -ed_rint(sc) - struct ed_softc *sc; -{ - u_int8_t boundary, current; - u_int16_t len; - u_int8_t nlen; - u_int8_t next_packet; /* pointer to next packet */ - u_int16_t count; /* bytes in packet (length + 4) */ - u_int8_t packet_hdr[ED_RING_HDRSZ]; - caddr_t packet_ptr; - -loop: - /* Set NIC to page 1 registers to get 'current' pointer. */ - NIC_PUT(sc, 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(sc, ED_P1_CURR); - if (sc->next_packet == current) - return; - - /* Set NIC to page 0 registers to update boundary register. */ - NIC_PUT(sc, 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); - - /* - * The byte count includes a 4 byte header that was added by - * the NIC. - */ - bcopy(packet_ptr, packet_hdr, ED_RING_HDRSZ); - next_packet = packet_hdr[ED_RING_NEXT_PACKET]; - len = count = packet_hdr[ED_RING_COUNT] + - 256 * packet_hdr[ED_RING_COUNT + 1]; - /* - * 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 (next_packet >= sc->next_packet) - nlen = next_packet - sc->next_packet; - else - nlen = next_packet - sc->rec_page_start + - sc->rec_page_stop - sc->next_packet; - --nlen; - if ((len & ED_PAGE_MASK) + ED_RING_HDRSZ > ED_PAGE_SIZE) - --nlen; - len = (len & ED_PAGE_MASK) | (nlen << ED_PAGE_SHIFT); -#ifdef DIAGNOSTIC - if (len != 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, count, len, - sc->rec_page_start, sc->next_packet, current, - packet_hdr[ED_RING_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 && next_packet >= sc->rec_page_start && - next_packet < sc->rec_page_stop) { - /* Go get packet. */ - ed_get_packet(sc, packet_ptr + ED_RING_HDRSZ, - len - ED_RING_HDRSZ); - ++sc->sc_arpcom.ac_if.if_ipackets; - } 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); - ++sc->sc_arpcom.ac_if.if_ierrors; - ed_reset(sc); - return; - } - - /* Update next packet pointer. */ - sc->next_packet = 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(sc, ED_P0_BNRY, boundary); - } while (sc->next_packet != current); - - goto loop; -} - -/* Ethernet interface interrupt processor. */ -int -edintr(arg) - void *arg; -{ - struct ed_softc *sc = arg; - u_char isr; - - /* Set NIC to page 0 registers. */ - NIC_PUT(sc, ED_P0_CR, sc->cr_proto | ED_CR_PAGE_0 | ED_CR_STA); - - isr = NIC_GET(sc, 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(sc, 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(sc, 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(sc, ED_P0_TSR); - if (isr & ED_ISR_TXE) { - /* - * Excessive collisions (16). - */ - if ((NIC_GET(sc, 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. */ - ++sc->sc_arpcom.ac_if.if_oerrors; - } else { - /* - * Update total number of successfully - * transmitted packets. - */ - ++sc->sc_arpcom.ac_if.if_opackets; - } - - /* Reset TX busy and output active flags. */ - sc->xmit_busy = 0; - sc->sc_arpcom.ac_if.if_flags &= ~IFF_OACTIVE; - - /* Clear watchdog timer. */ - sc->sc_arpcom.ac_if.if_timer = 0; - - /* - * Add in total number of collisions on last - * transmission. - */ - sc->sc_arpcom.ac_if.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 && --sc->txb_inuse) - ed_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) { - ++sc->sc_arpcom.ac_if.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. */ - ed_reset(sc); - } else { - /* - * Receiver Error. One or more of: CRC error, - * frame alignment error FIFO overrun, or - * missed packet. - */ - if (isr & ED_ISR_RXE) { - ++sc->sc_arpcom.ac_if.if_ierrors; -#ifdef ED_DEBUG - printf("%s: receive error %x\n", - sc->sc_dev.dv_xname, - NIC_GET(sc, 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). - */ - ed_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. - */ - if ((sc->sc_arpcom.ac_if.if_flags & IFF_OACTIVE) == 0) - ed_start(&sc->sc_arpcom.ac_if); - - /* - * 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(sc, 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(sc, ED_P0_CNTR0); - (void) NIC_GET(sc, ED_P0_CNTR1); - (void) NIC_GET(sc, ED_P0_CNTR2); - } - - isr = NIC_GET(sc, ED_P0_ISR); - if (!isr) - return (1); - } -} - -/* - * Process an ioctl request. This code needs some work - it looks pretty ugly. - */ -int -ed_ioctl(ifp, command, data) - register struct ifnet *ifp; - u_long command; - caddr_t data; -{ - struct ed_softc *sc = ifp->if_softc; - register struct ifaddr *ifa = (struct ifaddr *)data; - struct ifreq *ifr = (struct ifreq *)data; - int s, error = 0; - - s = splnet(); - - if ((error = ether_ioctl(ifp, &sc->sc_arpcom, command, data)) > 0) { - splx(s); - return error; - } - - switch (command) { - - case SIOCSIFADDR: - ifp->if_flags |= IFF_UP; - - switch (ifa->ifa_addr->sa_family) { -#ifdef INET - case AF_INET: - ed_init(sc); - arp_ifinit(&sc->sc_arpcom, ifa); - break; -#endif -#ifdef NS - /* XXX - This code is probably wrong. */ - case AF_NS: - { - register struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; - - if (ns_nullhost(*ina)) - ina->x_host = - *(union ns_host *)(sc->sc_arpcom.ac_enaddr); - else - bcopy(ina->x_host.c_host, - sc->sc_arpcom.ac_enaddr, - sizeof(sc->sc_arpcom.ac_enaddr)); - /* Set new address. */ - ed_init(sc); - break; - } -#endif - default: - ed_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. - */ - ed_stop(sc); - ifp->if_flags &= ~IFF_RUNNING; - } 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. - */ - ed_init(sc); - } else { - /* - * Reset the interface to pick up changes in any other - * flags that affect hardware registers. - */ - ed_stop(sc); - ed_init(sc); - } - break; - - case SIOCADDMULTI: - case SIOCDELMULTI: - /* Update our multicast list. */ - error = (command == SIOCADDMULTI) ? - ether_addmulti(ifr, &sc->sc_arpcom) : - ether_delmulti(ifr, &sc->sc_arpcom); - - if (error == ENETRESET) { - /* - * Multicast list has changed; set the hardware filter - * accordingly. - */ - ed_stop(sc); /* XXX for ds_setmcaf? */ - ed_init(sc); - error = 0; - } - break; - - default: - error = EINVAL; - } - - splx(s); - return (error); -} - -/* - * Retreive packet from shared memory and send to the next level up via - * ether_input(). If there is a BPF listener, give a copy to BPF, too. - */ -void -ed_get_packet(sc, buf, len) - struct ed_softc *sc; - caddr_t buf; - u_short len; -{ - struct ether_header *eh; - struct mbuf *m; - - /* round length to word boundry */ - len = (len + 1) & ~1; - - /* Allocate a header mbuf. */ - MGETHDR(m, M_DONTWAIT, MT_DATA); - if (m == 0) - return; - m->m_pkthdr.rcvif = &sc->sc_arpcom.ac_if; - m->m_pkthdr.len = len; - m->m_len = 0; - - /* The following silliness is to make NFS happy. */ -#define EROUND ((sizeof(struct ether_header) + 3) & ~3) -#define EOFF (EROUND - sizeof(struct ether_header)) - - /* - * The following assumes there is room for the ether header in the - * header mbuf. - */ - m->m_data += EOFF; - eh = mtod(m, struct ether_header *); - - word_copy(buf, mtod(m, caddr_t), sizeof(struct ether_header)); - buf += sizeof(struct ether_header); - m->m_len += sizeof(struct ether_header); - len -= sizeof(struct ether_header); - - /* Pull packet off interface. */ - if (ed_ring_to_mbuf(sc, buf, m, len) == 0) { - m_freem(m); - return; - } - -#if NBPFILTER > 0 - /* - * Check if there's a BPF listener on this interface. If so, hand off - * the raw packet to bpf. - */ - if (sc->sc_arpcom.ac_if.if_bpf) - bpf_mtap(sc->sc_arpcom.ac_if.if_bpf, m); -#endif - - /* Fix up data start offset in mbuf to point past ether header. */ - m_adj(m, sizeof(struct ether_header)); - ether_input(&sc->sc_arpcom.ac_if, eh, m); -} - -/* - * Supporting routines. - */ - -/* - * Given a source and destination address, copy 'amount' of a packet from the - * ring buffer into a linear destination buffer. Takes into account ring-wrap. - */ -static inline caddr_t -ed_ring_copy(sc, src, dst, amount) - struct ed_softc *sc; - caddr_t src, dst; - u_short amount; -{ - 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. */ - word_copy(src, dst, tmp_amount); - - amount -= tmp_amount; - src = sc->mem_ring; - dst += tmp_amount; - } - - word_copy(src, dst, amount); - - return (src + amount); -} - -/* - * Copy data from receive buffer to end of mbuf chain allocate additional mbufs - * as needed. Return pointer to last mbuf in chain. - * sc = ed info (softc) - * src = pointer in ed ring buffer - * dst = pointer to last mbuf in mbuf chain to copy to - * amount = amount of data to copy - */ -struct mbuf * -ed_ring_to_mbuf(sc, src, dst, total_len) - struct ed_softc *sc; - caddr_t src; - struct mbuf *dst; - u_short total_len; -{ - register struct mbuf *m = dst; - - /* Round the length to a word boundary. */ - /* total_len = (total_len + 1) & ~1; */ - - while (total_len) { - register u_short amount = min(total_len, M_TRAILINGSPACE(m)); - - if (amount == 0) { - /* - * No more data in this mbuf; alloc another. - * - * If there is enough data for an mbuf cluster, attempt - * to allocate one of those, otherwise, a regular mbuf - * will do. - * Note that a regular mbuf is always required, even if - * we get a cluster - getting a cluster does not - * allocate any mbufs, and one is needed to assign the - * cluster to. The mbuf that has a cluster extension - * can not be used to contain data - only the cluster - * can contain data. - */ - dst = m; - MGET(m, M_DONTWAIT, MT_DATA); - if (m == 0) - return (0); - - if (total_len >= MINCLSIZE) - MCLGET(m, M_DONTWAIT); - - m->m_len = 0; - dst->m_next = m; - amount = min(total_len, M_TRAILINGSPACE(m)); - } - - src = ed_ring_copy(sc, src, mtod(m, caddr_t) + m->m_len, - amount); - - m->m_len += amount; - total_len -= amount; - } - return (m); -} - -/* - * Compute the multicast address filter from the list of multicast addresses we - * need to listen to. - */ -void -ed_getmcaf(ac, af) - struct arpcom *ac; - u_long *af; -{ - struct ifnet *ifp = &ac->ac_if; - struct ether_multi *enm; - register u_char *cp, c; - register u_long crc; - register 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; - af[0] = af[1] = 0xffffffff; - return; - } - - af[0] = af[1] = 0; - ETHER_FIRST_MULTI(step, ac, 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; - af[0] = af[1] = 0xffffffff; - 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 >> 5] |= 1 << ((crc & 0x1f) ^ 0); - - ETHER_NEXT_MULTI(step, enm); - } - ifp->if_flags &= ~IFF_ALLMULTI; -} - -/* - * Copy packet from mbuf to the board memory - * - * Currently uses an extra buffer/extra memory copy, - * unless the whole packet fits in one mbuf. - * - */ -u_short -ed_put(sc, m, buf) - struct ed_softc *sc; - struct mbuf *m; - caddr_t buf; -{ - u_char *data, savebyte[2]; - int len, wantbyte; - u_short totlen; - - totlen = wantbyte = 0; - - for (; m != 0; m = m->m_next) { - data = mtod(m, u_char *); - len = m->m_len; - totlen += len; - if (len > 0) { - /* Finish the last word. */ - if (wantbyte) { - savebyte[1] = *data; - word_copy(savebyte, buf, 2); - buf += 2; - data++; - len--; - wantbyte = 0; - } - /* Output contiguous words. */ - if (len > 1) { - word_copy(data, buf, len); - buf += len & ~1; - data += len & ~1; - len &= 1; - } - /* Save last byte, if necessary. */ - if (len == 1) { - savebyte[0] = *data; - wantbyte = 1; - } - } - } - - if (wantbyte) { - savebyte[1] = 0; - word_copy(savebyte, buf, 2); - buf += 2; - } - - return (totlen); -} |