summaryrefslogtreecommitdiff
path: root/i386/i386at/gpl/if_ns.c
diff options
context:
space:
mode:
Diffstat (limited to 'i386/i386at/gpl/if_ns.c')
-rw-r--r--i386/i386at/gpl/if_ns.c642
1 files changed, 642 insertions, 0 deletions
diff --git a/i386/i386at/gpl/if_ns.c b/i386/i386at/gpl/if_ns.c
new file mode 100644
index 0000000..da629cb
--- /dev/null
+++ b/i386/i386at/gpl/if_ns.c
@@ -0,0 +1,642 @@
+/*
+ * Copyright (c) 1994 Shantanu Goel
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * THE AUTHOR ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION. THE AUTHOR DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ */
+
+/*
+ * Written 1992,1993 by Donald Becker.
+ *
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may be used and
+ * distributed according to the terms of the GNU Public License,
+ * incorporated herein by reference.
+ *
+ * The Author may be reached as becker@super.org or
+ * C/O Supercomputing Research Ctr., 17100 Science Dr., Bowie MD 20715
+ */
+
+#include <ul.h>
+#include <wd.h>
+#include <hpp.h>
+#if NUL > 0 || NWD > 0 || NHPP > 0
+/*
+ * Generic NS8390 routines.
+ * Derived from the Linux driver by Donald Becker.
+ *
+ * Shantanu Goel (goel@cs.columbia.edu)
+ */
+#include <sys/types.h>
+#include <device/device_types.h>
+#include <device/errno.h>
+#include <device/io_req.h>
+#include <device/if_hdr.h>
+#include <device/if_ether.h>
+#include <device/net_status.h>
+#include <device/net_io.h>
+#include <chips/busses.h>
+#include <i386/machspl.h>
+#include <i386/pio.h>
+#include <i386at/gpl/if_nsreg.h>
+
+#define IO_DELAY __asm__ __volatile__ ("outb %al,$0x80")
+#define outb_p(p, v) { outb(p, v); IO_DELAY; }
+#define inb_p(p) ({ unsigned char _v; _v = inb(p); IO_DELAY; _v; })
+
+#define NSDEBUG
+#ifdef NSDEBUG
+int nsdebug = 0;
+#define DEBUGF(stmt) { if (nsdebug) stmt; }
+#else
+#define DEBUGF(stmt)
+#endif
+
+void nsxint(struct nssoftc *);
+void nsrint(struct nssoftc *);
+void nsxmit(struct nssoftc *, unsigned, int);
+void nsrxoverrun(struct nssoftc *);
+
+/*
+ * Initialize the NIC.
+ * Must be called at splimp().
+ */
+void
+nsinit(sc)
+ struct nssoftc *sc;
+{
+ int port = sc->sc_port, i, rxconfig;
+ int endcfg = sc->sc_word16 ? (0x48 | ENDCFG_WTS) : 0x48;
+ struct ifnet *ifp = &sc->sc_if;
+
+ /*
+ * Reset the board.
+ */
+ (*sc->sc_reset)(sc);
+
+ sc->sc_oactive = 0;
+ sc->sc_txing = 0;
+ sc->sc_timer = 0;
+ sc->sc_tx1 = sc->sc_tx2 = 0;
+ sc->sc_curpg = sc->sc_rxstrtpg;
+
+ /*
+ * Follow National Semiconductor's recommendations for
+ * initializing the DP83902.
+ */
+ outb_p(port, E8390_NODMA+E8390_PAGE0+E8390_STOP); /* 0x21 */
+ outb_p(port + EN0_DCFG, endcfg); /* 0x48 or 0x49 */
+
+ /*
+ * Clear remote byte count registers.
+ */
+ outb_p(port + EN0_RCNTLO, 0);
+ outb_p(port + EN0_RCNTHI, 0);
+
+ /*
+ * Set to monitor and loopback mode -- this is vital!
+ */
+ outb_p(port + EN0_RXCR, E8390_RXOFF); /* 0x20 */
+ outb_p(port + EN0_TXCR, E8390_TXOFF); /* 0x02 */
+
+ /*
+ * Set transmit page and receive ring.
+ */
+ outb_p(port + EN0_TPSR, sc->sc_txstrtpg);
+ outb_p(port + EN0_STARTPG, sc->sc_rxstrtpg);
+ outb_p(port + EN0_BOUNDARY, sc->sc_stoppg - 1);
+ outb_p(port + EN0_STOPPG, sc->sc_stoppg);
+
+ /*
+ * Clear pending interrupts and mask.
+ */
+ outb_p(port + EN0_ISR, 0xff);
+
+ /*
+ * Enable the following interrupts: receive/transmit complete,
+ * receive/transmit error, and Receiver OverWrite.
+ *
+ * Counter overflow and Remote DMA complete are *not* enabled.
+ */
+ outb_p(port + EN0_IMR, ENISR_RX | ENISR_TX | ENISR_RX_ERR |
+ ENISR_TX_ERR | ENISR_OVER );
+
+ /*
+ * Copy station address into 8390 registers.
+ */
+ outb_p(port, E8390_NODMA + E8390_PAGE1 + E8390_STOP); /* 0x61 */
+ for (i = 0; i < ETHER_ADDR_LEN; i++)
+ outb_p(port + EN1_PHYS + i, sc->sc_addr[i]);
+
+ /*
+ * Set up to accept all multicast packets.
+ */
+ for (i = 0; i < 8; i++)
+ outb_p(port + EN1_MULT + i, 0xff);
+
+ /*
+ * Initialize CURRent pointer
+ */
+ outb_p(port + EN1_CURPAG, sc->sc_rxstrtpg);
+
+ /*
+ * Program command register for page 0.
+ */
+ outb_p(port, E8390_NODMA + E8390_PAGE0 + E8390_STOP);
+
+#if 0
+ outb_p(port + EN0_ISR, 0xff);
+ outb_p(port + EN0_IMR, ENISR_ALL);
+#endif
+
+ outb_p(port + E8390_CMD, E8390_NODMA + E8390_PAGE0 + E8390_START);
+ outb_p(port + EN0_TXCR, E8390_TXCONFIG); /* xmit on */
+
+ /* 3c503 TechMan says rxconfig only after the NIC is started. */
+ rxconfig = E8390_RXCONFIG;
+ if (ifp->if_flags & IFF_ALLMULTI)
+ rxconfig |= 0x08;
+ if (ifp->if_flags & IFF_PROMISC)
+ rxconfig |= 0x10;
+ outb_p(port + EN0_RXCR, rxconfig); /* rx on */
+
+ /*
+ * Mark interface as up and start output.
+ */
+ ifp->if_flags |= IFF_RUNNING;
+ nsstart(sc);
+}
+
+/*
+ * Start output on interface.
+ * Must be called at splimp().
+ */
+void
+nsstart(sc)
+ struct nssoftc *sc;
+{
+ io_req_t ior;
+ struct ifnet *ifp = &sc->sc_if;
+
+ /*
+ * Drop packets if interface is down.
+ */
+ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
+ while (1) {
+ IF_DEQUEUE(&ifp->if_snd, ior);
+ if (ior == 0)
+ return;
+ iodone(ior);
+ }
+ }
+ /*
+ * If transmitter is busy, bail out.
+ */
+ if (sc->sc_oactive)
+ return;
+
+ /*
+ * Dequeue a packet.
+ */
+ IF_DEQUEUE(&ifp->if_snd, ior);
+ if (ior == 0)
+ return;
+
+ /* Mask interrupts from the ethercard. */
+ outb( sc->sc_port + EN0_IMR, 0x00);
+
+ if (sc->sc_pingpong) {
+ int count, output_page;
+
+ if (sc->sc_tx1 == 0) {
+ output_page = sc->sc_txstrtpg;
+ sc->sc_tx1 = count = (*sc->sc_output)(sc,
+ ior->io_count,
+ ior->io_data,
+ sc->sc_txstrtpg);
+ } else if (sc->sc_tx2 == 0) {
+ output_page = sc->sc_txstrtpg + 6;
+ sc->sc_tx2 = count = (*sc->sc_output)(sc,
+ ior->io_count,
+ ior->io_data,
+ output_page);
+ } else {
+ sc->sc_oactive = 1;
+ IF_PREPEND(&ifp->if_snd, ior);
+ return;
+ }
+
+ DEBUGF({
+ struct ether_header *eh;
+
+ eh = (struct ether_header *)ior->io_data;
+ printf("send: %s%d: %x:%x:%x:%x:%x:%x, "
+ "olen %d, len %d\n",
+ sc->sc_name, sc->sc_unit,
+ eh->ether_dhost[0], eh->ether_dhost[1],
+ eh->ether_dhost[2], eh->ether_dhost[3],
+ eh->ether_dhost[4], eh->ether_dhost[5],
+ ior->io_count, count);
+ });
+
+ if (!sc->sc_txing) {
+ nsxmit(sc, count, output_page);
+ if (output_page == sc->sc_txstrtpg)
+ sc->sc_tx1 = -1, sc->sc_lasttx = -1;
+ else
+ sc->sc_tx2 = -1, sc->sc_lasttx = -2;
+ }
+ sc->sc_oactive = (sc->sc_tx1 && sc->sc_tx2);
+ } else {
+ int count;
+
+ count = (*sc->sc_output)(sc, ior->io_count,
+ ior->io_data, sc->sc_txstrtpg);
+
+ DEBUGF({
+ struct ether_header *eh;
+
+ eh = (struct ether_header *)ior->io_data;
+ printf("send: %s%d: %x:%x:%x:%x:%x:%x, "
+ "olen %d, len %d\n",
+ sc->sc_name, sc->sc_unit,
+ eh->ether_dhost[0], eh->ether_dhost[1],
+ eh->ether_dhost[2], eh->ether_dhost[3],
+ eh->ether_dhost[4], eh->ether_dhost[5],
+ ior->io_count, count);
+ });
+
+ nsxmit(sc, count, sc->sc_txstrtpg);
+ sc->sc_oactive = 1;
+ }
+
+ /* reenable 8390 interrupts. */
+ outb_p(sc->sc_port + EN0_IMR, ENISR_ALL);
+
+ iodone(ior);
+}
+
+/*
+ * Interrupt routine.
+ * Called by board level driver.
+ */
+void
+nsintr(sc)
+ struct nssoftc *sc;
+{
+ int port = sc->sc_port;
+ int interrupts, boguscount = 0;
+ struct ifnet *ifp = &sc->sc_if;
+
+ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
+ DEBUGF(printf("nsintr: %s%d: interface down\n",
+ sc->sc_name, sc->sc_unit));
+ return;
+ }
+
+ /*
+ * Change to page 0 and read intr status reg.
+ */
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE0);
+
+ while ((interrupts = inb_p(port + EN0_ISR)) != 0 && ++boguscount < 9) {
+ if (interrupts & ENISR_RDC) {
+ /*
+ * Ack meaningless DMA complete.
+ */
+ outb_p(port + EN0_ISR, ENISR_RDC);
+ }
+
+ if (interrupts & ENISR_OVER)
+ nsrxoverrun(sc);
+ else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
+ nsrint(sc);
+ }
+
+ if (interrupts & ENISR_TX) {
+ nsxint(sc);
+ }
+ else if (interrupts & ENISR_COUNTERS) {
+ /*
+ * XXX - We really should be storing statistics
+ * about the interface. For now we just drop them.
+ */
+
+ /* reading resets the counters! */
+ (void) inb_p(port + EN0_COUNTER0); /* frame */
+ (void) inb_p(port + EN0_COUNTER1); /* crc */
+ (void) inb_p(port + EN0_COUNTER2); /* miss */
+
+ DEBUGF(printf("%s%d: acked counter interrupt.\n",
+ sc->sc_name, sc->sc_unit));
+
+ outb_p(port + EN0_ISR, ENISR_COUNTERS); /* ack intr */
+ }
+
+ if (interrupts & ENISR_TX_ERR) {
+ DEBUGF(printf("acking transmit error\n"));
+ outb_p(port + EN0_ISR, ENISR_TX_ERR); /* ack intr */
+ }
+
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE0+E8390_START);
+ }
+
+ DEBUGF({
+ if (interrupts) {
+ printf("%s%d: unknown interrupt 0x%x",
+ sc->sc_name, sc->sc_unit, interrupts);
+ outb_p(port + E8390_CMD,
+ E8390_NODMA+E8390_PAGE0+E8390_START);
+ outb_p(port + EN0_ISR, 0xff); /* ack all intrs */
+ }
+ })
+}
+
+/*
+ * Process a transmit interrupt.
+ */
+void
+nsxint(sc)
+ struct nssoftc *sc;
+{
+ int port = sc->sc_port, status;
+ struct ifnet *ifp = &sc->sc_if;
+
+ status = inb(port + EN0_TSR);
+ outb_p(port + EN0_ISR, ENISR_TX); /* ack intr */
+
+ sc->sc_txing = 0;
+ sc->sc_timer = 0;
+ sc->sc_oactive = 0;
+
+ if (sc->sc_pingpong) {
+ if (sc->sc_tx1 < 0) {
+ if (sc->sc_lasttx != 1 && sc->sc_lasttx != -1)
+ printf("%s%d: bogus last_tx_buffer %d,"
+ "tx1 = %d\n",
+ sc->sc_name, sc->sc_unit,
+ sc->sc_lasttx, sc->sc_tx1);
+ sc->sc_tx1 = 0;
+ if (sc->sc_tx2 > 0) {
+ nsxmit(sc, sc->sc_tx2, sc->sc_txstrtpg + 6);
+ sc->sc_tx2 = -1;
+ sc->sc_lasttx = 2;
+ } else
+ sc->sc_lasttx = 20;
+ } else if (sc->sc_tx2 < 0) {
+ if (sc->sc_lasttx != 2 && sc->sc_lasttx != -2)
+ printf("%s%d: bogus last_tx_buffer %d,"
+ "tx2 = %d\n",
+ sc->sc_name, sc->sc_unit,
+ sc->sc_lasttx, sc->sc_tx2);
+ sc->sc_tx2 = 0;
+ if (sc->sc_tx1 > 0) {
+ nsxmit(sc, sc->sc_tx1, sc->sc_txstrtpg);
+ sc->sc_tx1 = -1;
+ sc->sc_lasttx = 1;
+ } else
+ sc->sc_lasttx = 10;
+ } else
+ printf("%s%d: unexpected TX-done interrupt, "
+ "lasttx = %d\n",
+ sc->sc_name, sc->sc_unit, sc->sc_lasttx);
+ }
+ /*
+ * Update stats.
+ */
+ if (status & ENTSR_COL) {
+ if (status & ENTSR_ABT)
+ ifp->if_collisions += 16;
+ else
+ ifp->if_collisions += inb(port + EN0_NCR);
+ }
+ if (status & ENTSR_PTX) {
+ DEBUGF(printf("sent: %s%d\n", sc->sc_name, sc->sc_unit));
+ ifp->if_opackets++;
+ } else
+ ifp->if_oerrors++;
+
+ /*
+ * Start output on interface.
+ */
+ nsstart(sc);
+}
+
+/*
+ * Process a receive interrupt.
+ */
+void
+nsrint(sc)
+ struct nssoftc *sc;
+{
+ int port = sc->sc_port;
+ int rxing_page, this_frame, next_frame, current_offset;
+ int rx_pkt_count = 0;
+ int num_rx_pages = sc->sc_stoppg - sc->sc_rxstrtpg;
+ struct nspkthdr rx_frame;
+ struct ifnet *ifp = &sc->sc_if;
+
+ while (++rx_pkt_count < 10) {
+ int pkt_len;
+
+ /*
+ * Get the rx page (incoming packet pointer).
+ */
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE1);
+ rxing_page = inb_p(port + EN1_CURPAG);
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE0);
+
+ /*
+ * Remove one frame from the ring.
+ * Boundary is always a page behind.
+ */
+ this_frame = inb_p(port + EN0_BOUNDARY) + 1;
+ if (this_frame >= sc->sc_stoppg)
+ this_frame = sc->sc_rxstrtpg;
+
+ DEBUGF({
+ if (this_frame != sc->sc_curpg)
+ printf("%s%d: mismatched read page pointers "
+ "%x vs %x\n",
+ sc->sc_name, sc->sc_unit,
+ this_frame, sc->sc_curpg);
+ });
+
+ if (this_frame == rxing_page) {
+ DEBUGF(printf("this_frame = rxing_page!\n"));
+ break;
+ }
+
+ current_offset = this_frame << 8;
+ (*sc->sc_input)(sc, sizeof(rx_frame), (char *)&rx_frame,
+ current_offset);
+
+ pkt_len = rx_frame.count - sizeof(rx_frame);
+
+ next_frame = this_frame + 1 + ((pkt_len + 4) >> 8);
+
+ if (rx_frame.next != next_frame
+ && rx_frame.next != next_frame + 1
+ && rx_frame.next != next_frame - num_rx_pages
+ && rx_frame.next != next_frame + 1 - num_rx_pages) {
+ sc->sc_curpg = rxing_page;
+ outb(port + EN0_BOUNDARY, sc->sc_curpg - 1);
+ ifp->if_ierrors++;
+ DEBUGF(printf("INPUT ERROR?\n"));
+ continue;
+ }
+ if (pkt_len < 60 || pkt_len > 1518) {
+ ifp->if_ierrors++;
+ DEBUGF(printf("%s%d: bad packet length %d\n",
+ sc->sc_name, sc->sc_unit, pkt_len));
+ } else if ((rx_frame.status & 0x0f) == ENRSR_RXOK) {
+ ipc_kmsg_t kmsg;
+
+ kmsg = net_kmsg_get();
+ if (kmsg == 0) {
+ DEBUGF(printf("%s%d: dropped packet\n",
+ sc->sc_name, sc->sc_unit));
+ ifp->if_rcvdrops++;
+ } else {
+ int len, off;
+ struct ether_header *eh;
+ struct packet_header *pkt;
+
+ ifp->if_ipackets++;
+ off = current_offset + sizeof(rx_frame);
+ eh = ((struct ether_header *)
+ (&net_kmsg(kmsg)->header[0]));
+ (*sc->sc_input)(sc,
+ sizeof(struct ether_header),
+ (char *)eh, off);
+ off += sizeof(struct ether_header);
+ len = pkt_len - sizeof(struct ether_header);
+
+ DEBUGF(printf("rcv: %s%d: %x:%x:%x:%x:%x:%x, "
+ "len %d, type 0x%x\n",
+ sc->sc_name, sc->sc_unit,
+ eh->ether_shost[0],
+ eh->ether_shost[1],
+ eh->ether_shost[2],
+ eh->ether_shost[3],
+ eh->ether_shost[4],
+ eh->ether_shost[5],
+ len, eh->ether_type));
+
+ pkt = ((struct packet_header *)
+ (&net_kmsg(kmsg)->packet[0]));
+ (*sc->sc_input)(sc, len, (char *)(pkt+1), off);
+ pkt->type = eh->ether_type;
+ pkt->length = len+sizeof(struct packet_header);
+ net_packet(ifp, kmsg, pkt->length,
+ ethernet_priority(kmsg));
+ }
+ } else {
+ DEBUGF(printf("%s%d: bogus packet: "
+ "status=0x%x nxpg=0x%x size=%d\n",
+ sc->sc_name, sc->sc_unit,
+ rx_frame.status, rx_frame.next,
+ rx_frame.count));
+ ifp->if_ierrors++;
+ }
+ next_frame = rx_frame.next;
+ if (next_frame >= sc->sc_stoppg) {
+ DEBUGF(printf("%s%d: next frame inconsistency, 0x%x\n",
+ sc->sc_name, sc->sc_unit, next_frame));
+ next_frame = sc->sc_rxstrtpg;
+ }
+ sc->sc_curpg = next_frame;
+ outb(port + EN0_BOUNDARY, next_frame - 1);
+ }
+
+ /*
+ * Bug alert! Reset ENISR_OVER to avoid spurious overruns!
+ */
+ outb_p(port + EN0_ISR, ENISR_RX+ENISR_RX_ERR+ENISR_OVER);
+}
+
+/*
+ * Handle a receive overrun condition.
+ *
+ * XXX - this needs to be gone over in light of the NS documentation.
+ */
+void
+nsrxoverrun(sc)
+ struct nssoftc *sc;
+{
+ int port = sc->sc_port, i;
+ extern unsigned delaycount;
+
+ printf("%s%d: receive overrun\n", sc->sc_name, sc->sc_unit);
+
+ /*
+ * We should already be stopped and in page0, but just to be sure...
+ */
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE0+E8390_STOP);
+
+ /*
+ * Clear remote byte counter registers.
+ */
+ outb_p(port + EN0_RCNTLO, 0);
+ outb_p(port + EN0_RCNTHI, 0);
+
+ /*
+ * Wait for reset to complete.
+ */
+ for (i = delaycount*2; i && !(inb_p(port+EN0_ISR) & ENISR_RESET); i--)
+ ;
+ if (i == 0) {
+ printf("%s%d: reset did not complete at overrun\n",
+ sc->sc_name, sc->sc_unit);
+ nsinit(sc);
+ return;
+ }
+ /*
+ * Disable transmitter.
+ */
+ outb_p(port + EN0_TXCR, E8390_TXOFF);
+
+ /*
+ * Remove packets.
+ */
+ nsrint(sc);
+
+ outb_p(port + EN0_ISR, 0xff);
+ outb_p(port + E8390_CMD, E8390_NODMA+E8390_PAGE0+E8390_START);
+ outb_p(port + EN0_TXCR, E8390_TXCONFIG);
+}
+
+/*
+ * Trigger a transmit start.
+ */
+void
+nsxmit(sc, length, start_page)
+ struct nssoftc *sc;
+ unsigned length;
+ int start_page;
+{
+ int port = sc->sc_port;
+
+ sc->sc_txing = 1;
+ outb_p(port, E8390_NODMA+E8390_PAGE0);
+ if (inb_p(port) & E8390_TRANS) {
+ printf("%s%d: nsxmit() called with the transmitter busy\n",
+ sc->sc_name, sc->sc_unit);
+ return;
+ }
+ outb_p(port + EN0_TCNTLO, length & 0xff);
+ outb_p(port + EN0_TCNTHI, (length >> 8) & 0xff);
+ outb_p(port + EN0_TPSR, start_page);
+ outb_p(port, E8390_NODMA+E8390_TRANS+E8390_START);
+ sc->sc_timer = 4;
+}
+
+#endif /* NUL > 0 || NWD > 0 */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 06:37:39 +0000