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-rw-r--r--sys/arch/mac68k/dev/if_sn.c1311
1 files changed, 1311 insertions, 0 deletions
diff --git a/sys/arch/mac68k/dev/if_sn.c b/sys/arch/mac68k/dev/if_sn.c
new file mode 100644
index 00000000000..5530835d5a4
--- /dev/null
+++ b/sys/arch/mac68k/dev/if_sn.c
@@ -0,0 +1,1311 @@
+/*
+ * National Semiconductor SONIC Driver
+ * Copyright (c) 1991 Algorithmics Ltd (http://www.algor.co.uk)
+ * You may use, copy, and modify this program so long as you retain the
+ * copyright line.
+ *
+ * This driver has been substantially modified since Algorithmics donated
+ * it.
+ */
+
+#include "sn.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mbuf.h>
+#include <sys/buf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/syslog.h>
+#include <sys/ioctl.h>
+#include <sys/errno.h>
+#include <sys/device.h>
+
+#include <net/if.h>
+#include <net/netisr.h>
+#include <net/route.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
+
+#ifdef RMP
+#include <netrmp/rmp.h>
+#include <netrmp/rmp_var.h>
+#endif
+
+#include <vm/vm.h>
+
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+#endif
+
+#define NTXB 10 /* Number of xmit buffers */
+
+#define SONICDW 32
+typedef unsigned char uchar;
+
+#include <mac68k/dev/if_sn.h>
+#define SWR(a, x) (a) = (x)
+#define SRD(a) ((a) & 0xffff)
+
+#define wbflush()
+
+/*
+ * Statistics collected over time
+ */
+struct sn_stats {
+ int ls_opacks; /* packets transmitted */
+ int ls_ipacks; /* packets received */
+ int ls_tdr; /* contents of tdr after collision */
+ int ls_tdef; /* packets where had to wait */
+ int ls_tone; /* packets with one retry */
+ int ls_tmore; /* packets with more than one retry */
+ int ls_tbuff; /* transmit buff errors */
+ int ls_tuflo; /* " uflo " */
+ int ls_tlcol;
+ int ls_tlcar;
+ int ls_trtry;
+ int ls_rbuff; /* receive buff errors */
+ int ls_rfram; /* framing */
+ int ls_roflo; /* overflow */
+ int ls_rcrc;
+ int ls_rrng; /* rx ring sequence error */
+ int ls_babl; /* chip babl error */
+ int ls_cerr; /* collision error */
+ int ls_miss; /* missed packet */
+ int ls_merr; /* memory error */
+ int ls_copies; /* copies due to out of range mbufs */
+ int ls_maxmbufs; /* max mbufs on transmit */
+ int ls_maxslots; /* max ring slots on transmit */
+};
+
+struct sn_softc {
+ struct device sc_dev;
+ struct arpcom sc_ac;
+#define sc_if sc_ac.ac_if /* network visible interface */
+#define sc_enaddr sc_ac.ac_enaddr /* hardware ethernet address */
+
+ struct sonic_reg *sc_csr; /* hardware pointer */
+ int sc_rxmark; /* position in rx ring for reading buffs */
+
+ int sc_rramark; /* index into rra of wp */
+
+ int sc_txhead; /* index of first TDA passed to chip */
+ int sc_missed; /* missed packet counter */
+
+ int txb_cnt; /* total number of xmit buffers */
+ int txb_inuse; /* number of active xmit buffers */
+ int txb_new; /* index of next open slot. */
+
+ struct RXpkt *sc_lrxp; /* last RDA available to chip */
+ struct sn_stats sc_sum;
+ short sc_iflags;
+} sn_softc;
+
+int snmatch __P((struct device *, void *, void *));
+void snattach __P((struct device *, struct device *, void *));
+
+struct cfdriver sncd = {
+ NULL, "sn", snmatch, snattach, DV_IFNET, sizeof(struct sn_softc)
+};
+
+#include <assert.h>
+void
+__assert(file, line, failedexpr)
+ const char *file, *failedexpr;
+ int line;
+{
+ (void)printf(
+ "assertion \"%s\" failed: file \"%s\", line %d\n",
+ failedexpr, file, line);
+}
+
+void
+m_check(m)
+ struct mbuf *m;
+{
+ if (m->m_flags & M_EXT) {
+ assert(m->m_len >= 0);
+ assert(m->m_len <= m->m_ext.ext_size);
+ assert(m->m_data >= &m->m_ext.ext_buf[0]);
+ assert(m->m_data <= &m->m_ext.ext_buf[m->m_ext.ext_size]);
+ assert(m->m_data + m->m_len <= &m->m_ext.ext_buf[m->m_ext.ext_size]);
+ } else if (m->m_flags & M_PKTHDR) {
+ assert(m->m_len >= 0);
+ assert(m->m_len <= MHLEN);
+ assert(m->m_data >= m->m_pktdat);
+ assert(m->m_data <= &m->m_pktdat[MHLEN]);
+ assert(m->m_data + m->m_len <= &m->m_pktdat[MHLEN]);
+ } else {
+ assert(m->m_len >= 0);
+ assert(m->m_len <= MLEN);
+ assert(m->m_data >= m->m_dat);
+ assert(m->m_data <= &m->m_dat[MLEN]);
+ assert(m->m_data + m->m_len <= &m->m_dat[MLEN]);
+ }
+}
+
+void
+m_checkm(m)
+ struct mbuf *m;
+{
+ while (m) {
+ m_check(m);
+ m = m->m_next;
+ }
+}
+
+int ethdebug = 0;
+
+int snintr __P((struct sn_softc *));
+int snioctl __P((struct ifnet *ifp, u_long cmd, caddr_t data));
+void snstart __P((struct ifnet *ifp));
+void snwatchdog __P(( /*int unit */ ));
+void snreset __P((struct sn_softc *sc));
+
+/*
+ * SONIC buffers need to be aligned 16 or 32 bit aligned.
+ * These macros calculate and verify alignment.
+ */
+#if SONICDW == 32
+#define SONICALIGN 4
+#else
+#define SONICALIGN 2
+#endif
+#define SOALIGN(array) (((int)array+SONICALIGN-1) & ~(SONICALIGN-1))
+#define SOALIGNED(p) (!(((uint)p)&(SONICALIGN-1)))
+
+#define LOWER(x) ((unsigned)(x) & 0xffff)
+#define UPPER(x) ((unsigned)(x) >> 16)
+
+/*
+ * buffer sizes in 32 bit mode
+ * 1 TXpkt is 4 hdr words + (3 * FRAGMAX) + 1 link word
+ * FRAGMAX == 16 => 54 words == 216 bytes
+ *
+ * 1 RxPkt is 7 words == 28 bytes
+ * 1 Rda is 4 words == 16 bytes
+ */
+
+#define NRRA 32 /* # receive resource descriptors */
+#define RRAMASK 0x1f /* the reason why it must be power of two */
+
+#define NRBA 16 /* # receive buffers < NRRA */
+#define NRDA NRBA /* # receive descriptors */
+#define NTDA 4 /* # transmit descriptors */
+
+#define CDASIZE sizeof(struct CDA)
+#define RRASIZE (NRRA*sizeof(struct RXrsrc))
+#define RDASIZE (NRDA*sizeof(struct RXpkt))
+#define TDASIZE (NTDA*sizeof(struct TXpkt))
+
+#define FCSSIZE 4 /* size of FCS append te received packets */
+
+/*
+ * maximum receive packet size plus 2 byte pad to make each
+ * one aligned. 4 byte slop (required for eobc)
+ */
+#define RBASIZE (sizeof(struct ether_header) + ETHERMTU + FCSSIZE + 2 + 4)
+
+/*
+ * space required for descriptors
+ */
+#define DESC_SIZE (RRASIZE + CDASIZE + RDASIZE + TDASIZE + SONICALIGN - 1)
+
+/*
+ * 16k transmit buffer area
+ */
+#define TXBSIZE 1536 /* 6*2^8 -- the same size as the 8390 TXBUF */
+#define TBASIZE (TXBSIZE * NTXB)
+
+/*
+ * Nicely aligned pointers into the SONIC buffers
+ * p_ points at physical (K1_SEG) addresses.
+ */
+struct RXrsrc *p_rra; /* receiver resource descriptors */
+struct RXpkt *p_rda; /* receiver desriptors */
+struct TXpkt *p_tda; /* transmitter descriptors */
+struct CDA *p_cda; /* CAM descriptors */
+char *p_rba; /* receive buffer area base */
+char *p_tba; /* transmit buffer area base */
+
+/* Meta transmit descriptors */
+struct mtd {
+ struct mtd *mtd_link;
+ struct TXpkt *mtd_txp;
+ unsigned char *mtd_buf;
+} mtda[NTDA];
+
+struct mtd *mtdfree; /* list of free meta transmit descriptors */
+struct mtd *mtdhead; /* head of descriptors assigned to chip */
+struct mtd *mtdtail; /* tail of descriptors assigned to chip */
+struct mtd *mtdnext; /* next descriptor to give to chip */
+
+void mtd_free __P((struct mtd *));
+struct mtd *mtd_alloc __P((void));
+
+int sngetaddr __P((struct sn_softc *sc));
+int sninit __P((int unit));
+int snstop __P((int unit));
+int sonicput __P((struct sn_softc *sc, struct mbuf *m0));
+
+void camdump __P((struct sn_softc *sc));
+
+int
+snmatch(parent, match, aux)
+ struct device *parent;
+ void *match, *aux;
+{
+ struct cfdata *cf = match;
+ struct confargs *ca = aux;
+
+ if (matchbyname(parent, cf, aux) == 0)
+ return 0;
+
+ if (!mac68k_machine.sonic)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Interface exists: make available by filling in network interface
+ * record. System will initialize the interface when it is ready
+ * to accept packets.
+ */
+void
+snattach(parent, self, aux)
+ struct device *parent, *self;
+ void *aux;
+{
+extern unsigned char SONICSPACE;
+extern unsigned long SONICSPACE_size;
+ struct sn_softc *sc = (void *)self;
+ struct confargs *ca = aux;
+ struct ifnet *ifp = &sc->sc_if;
+ struct cfdata *cf = sc->sc_dev.dv_cfdata;
+ int base, p, pp;
+
+ /* Must allocate extra memory in case we need to round later. */
+ pp = (DESC_SIZE + NRBA*RBASIZE + 0x10000 + 4 + TBASIZE);
+ if (pp != SONICSPACE_size) {
+ printf(": SONICSPACE_size (%d) != pp (%d). Punt!\n",
+ SONICSPACE_size, pp);
+ return;
+ }
+ base = p = (int) &SONICSPACE;
+
+#define SONIC_IO_OFFSET 0xA000
+ sc->sc_csr = (struct sonic_reg *)(IOBase + SONIC_IO_OFFSET);
+
+/*
+ * Put the pup in reset mode (sninit() will fix it later)
+ * and clear any interrupts.
+ */
+ sc->sc_csr->s_cr = CR_RST;
+ wbflush();
+ sc->sc_csr->s_isr = 0x7fff;
+ wbflush();
+
+/*
+ * because the SONIC is basically 16bit device it 'concatenates'
+ * a higher buffer address to a 16 bit offset--this will cause wrap
+ * around problems near the end of 64k !!
+ */
+ if ((p ^ (p + RRASIZE + CDASIZE)) & 0x10000)
+ p = (p + 0x10000) & ~0xffff;
+ p_rra = (struct RXrsrc *) p;
+ p += RRASIZE;
+
+ p_cda = (struct CDA *) p;
+ p += CDASIZE;
+
+ if ((p ^ (p + RDASIZE)) & 0x10000)
+ p = (p + 0x10000) & ~0xffff;
+ p_rda = (struct RXpkt *) p;
+ p += RDASIZE;
+
+ if ((p ^ (p + TDASIZE)) & 0x10000)
+ p = (p + 0x10000) & ~0xffff;
+ p_tda = (struct TXpkt *) p;
+ p += TDASIZE;
+
+ p = SOALIGN(p);
+ p_rba = (char *) p;
+ p += NRBA * RBASIZE;
+
+ p_tba = (char *) p;
+
+#if 0
+ camdump(sc);
+#endif
+ sngetaddr(sc);
+ printf(" address %s, ", ether_sprintf(sc->sc_enaddr));
+ printf("SONIC ethernet--%d bytes at 0x%x.\n", pp, base);
+
+#if 0
+printf("sonic buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x rba=0x%x tba=0x%x\n",
+ p_rra, p_cda, p_rda, p_tda, p_rba, p_tba);
+#endif
+
+ add_nubus_intr(9, snintr, (void *) sc);
+ enable_nubus_intr();
+
+ ifp->if_name = "sn";
+ ifp->if_unit = sc->sc_dev.dv_unit;
+ ifp->if_ioctl = snioctl;
+ ifp->if_start = snstart;
+ ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+ ifp->if_watchdog = snwatchdog;
+#if NBPFILTER > 0
+ bpfattach(&ifp->if_bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
+#endif
+ if_attach(ifp);
+ ether_ifattach(ifp);
+}
+
+int
+snioctl(ifp, cmd, data)
+ struct ifnet *ifp;
+ u_long cmd;
+ caddr_t data;
+{
+ struct ifaddr *ifa;
+ struct sn_softc *sc = sncd.cd_devs[ifp->if_unit];
+ int s = splnet(), err = 0;
+ int temp;
+
+ switch (cmd) {
+
+ case SIOCSIFADDR:
+ ifa = (struct ifaddr *)data;
+ ifp->if_flags |= IFF_UP;
+ switch (ifa->ifa_addr->sa_family) {
+#ifdef INET
+ case AF_INET:
+ (void)sninit(ifp->if_unit);
+ arp_ifinit(&sc->sc_ac, ifa);
+ break;
+#endif
+#ifdef NS
+ case AF_NS:
+ {
+ struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
+
+ if (ns_nullhost(*ina)) {
+ ina->x_host = *(union ns_host *)(sc->sc_enaddr);
+ } else {
+ /* XXX
+ * add an extra i/f address to
+ * sonic filter
+ */
+ }
+ }
+ (void)sninit(ifp->if_unit);
+ break;
+#endif /* NS */
+ default:
+ (void)sninit(ifp->if_unit);
+ break;
+ }
+ break;
+
+ case SIOCSIFFLAGS:
+ if ((ifp->if_flags & IFF_UP) == 0 &&
+ ifp->if_flags & IFF_RUNNING) {
+ snstop(ifp->if_unit);
+ ifp->if_flags &= ~IFF_RUNNING;
+ } else if (ifp->if_flags & IFF_UP &&
+ (ifp->if_flags & IFF_RUNNING) == 0)
+ (void)sninit(ifp->if_unit);
+ /*
+ * If the state of the promiscuous bit changes, the interface
+ * must be reset to effect the change.
+ */
+ if (((ifp->if_flags ^ sc->sc_iflags) & IFF_PROMISC) &&
+ (ifp->if_flags & IFF_RUNNING)) {
+ sc->sc_iflags = ifp->if_flags;
+ printf("change in flags\n");
+ temp = sc->sc_if.if_flags & IFF_UP;
+ snreset(sc);
+ sc->sc_if.if_flags |= temp;
+ snstart(ifp);
+ }
+ break;
+
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ if(cmd == SIOCADDMULTI)
+ err = ether_addmulti((struct ifreq *)data, &sc->sc_ac);
+ else
+ err = ether_delmulti((struct ifreq *)data, &sc->sc_ac);
+
+ if (err == ENETRESET) {
+ /*
+ * Multicast list has changed; set the hardware
+ * filter accordingly. But remember UP flag!
+ */
+ temp = sc->sc_if.if_flags & IFF_UP;
+ snreset(sc);
+ sc->sc_if.if_flags |= temp;
+ err = 0;
+ }
+ break;
+ default:
+ err = EINVAL;
+ }
+ splx(s);
+ return (err);
+}
+
+/*
+ * Encapsulate a packet of type family for the local net.
+ * Use trailer local net encapsulation if enough data in first
+ * packet leaves a multiple of 512 bytes of data in remainder.
+ */
+void
+snstart(ifp)
+ struct ifnet *ifp;
+{
+ struct sn_softc *sc = sncd.cd_devs[ifp->if_unit];
+ struct mbuf *m;
+ int len;
+
+ if ((sc->sc_if.if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING)
+ return;
+
+outloop:
+ /* Check for room in the xmit buffer. */
+ if (sc->txb_inuse == sc->txb_cnt) {
+ ifp->if_flags |= IFF_OACTIVE;
+ return;
+ }
+
+ IF_DEQUEUE(&sc->sc_if.if_snd, m);
+ if (m == 0)
+ return;
+
+ /* We need the header for m_pkthdr.len. */
+ if ((m->m_flags & M_PKTHDR) == 0)
+ panic("snstart: no header mbuf");
+
+#if NBPFILTER > 0
+ /*
+ * If bpf is listening on this interface, let it
+ * see the packet before we commit it to the wire.
+ */
+ if (sc->sc_if.if_bpf)
+ bpf_mtap(sc->sc_if.if_bpf, m);
+#endif
+
+ /*
+ * If there is nothing in the o/p queue, and there is room in
+ * the Tx ring, then send the packet directly. Otherwise append
+ * it to the o/p queue.
+ */
+ len = sonicput(sc, m);
+#if DIAGNOSTIC
+ if (len != m->m_pkthdr.len) {
+ printf("snstart: len %d != m->m_pkthdr.len %d.\n",
+ len, m->m_pkthdr.len);
+ }
+#endif
+ len = m->m_pkthdr.len;
+
+ m_freem(m);
+
+ /* Point to next buffer slot and wrap if necessary. */
+ if (++sc->txb_new == sc->txb_cnt)
+ sc->txb_new = 0;
+
+ sc->txb_inuse++;
+
+ sc->sc_if.if_opackets++; /* # of pkts */
+ sc->sc_sum.ls_opacks++; /* # of pkts */
+
+ /* Jump back for possibly more punishment. */
+ goto outloop;
+}
+
+/*
+ * This is called from sonicioctl() when /etc/ifconfig is run to set
+ * the address or switch the i/f on.
+ */
+void caminitialise __P((void));
+void camentry __P((int, unsigned char *ea));
+void camprogram __P((struct sn_softc *));
+void initialise_tda __P((struct sn_softc *));
+void initialise_rda __P((struct sn_softc *));
+void initialise_rra __P((struct sn_softc *));
+void initialise_tba __P((struct sn_softc *));
+
+/*
+ * reset and restart the SONIC. Called in case of fatal
+ * hardware/software errors.
+ */
+void
+snreset(sc)
+ struct sn_softc *sc;
+{
+ printf("snreset\n");
+ snstop(sc->sc_dev.dv_unit);
+ sninit(sc->sc_dev.dv_unit);
+}
+
+int
+sninit(unit)
+ int unit;
+{
+ struct sn_softc *sc = sncd.cd_devs[unit];
+ struct sonic_reg *csr = sc->sc_csr;
+ int s, error;
+
+ if (sc->sc_if.if_flags & IFF_RUNNING)
+ /* already running */
+ return (0);
+
+ s = splnet();
+
+ csr->s_cr = CR_RST; /* s_dcr only accessable reset mode! */
+
+ /* config it */
+ csr->s_dcr = DCR_LBR | DCR_SYNC | DCR_WAIT0 | DCR_DW32 | DCR_DMABLOCK |
+ DCR_RFT16 | DCR_TFT16;
+ csr->s_rcr = RCR_BRD | RCR_LBNONE;
+ csr->s_imr = IMR_PRXEN | IMR_PTXEN | IMR_TXEREN | IMR_HBLEN | IMR_LCDEN;
+
+ /* clear pending interrupts */
+ csr->s_isr = 0x7fff;
+
+ /* clear tally counters */
+ csr->s_crct = -1;
+ csr->s_faet = -1;
+ csr->s_mpt = -1;
+
+ initialise_tda(sc);
+ initialise_rda(sc);
+ initialise_rra(sc);
+ initialise_tba(sc);
+
+ /* enable the chip */
+ csr->s_cr = 0;
+ wbflush();
+
+ /* program the CAM with our address */
+ caminitialise();
+ camentry(0, sc->sc_enaddr);
+ camprogram(sc);
+
+ /* get it to read resource descriptors */
+ csr->s_cr = CR_RRRA;
+ wbflush();
+ while (csr->s_cr & CR_RRRA)
+ continue;
+
+ /* enable rx */
+ csr->s_cr = CR_RXEN;
+ wbflush();
+
+ /* flag interface as "running" */
+ sc->sc_if.if_flags |= IFF_RUNNING;
+
+ splx(s);
+ return (0);
+
+bad:
+ snstop(sc->sc_dev.dv_unit);
+ return (error);
+}
+
+/*
+ * close down an interface and free its buffers
+ * Called on final close of device, or if sninit() fails
+ * part way through.
+ */
+int
+snstop(unit)
+ int unit;
+{
+ struct sn_softc *sc = sncd.cd_devs[unit];
+ struct mtd *mtd;
+ int s = splnet();
+
+ /* stick chip in reset */
+ sc->sc_csr->s_cr = CR_RST;
+ wbflush();
+
+ /* free all receive buffers (currently static so nothing to do) */
+
+ /* free all pending transmit mbufs */
+ while (mtd = mtdhead) {
+ mtdhead = mtdhead->mtd_link;
+ mtd->mtd_buf = 0;
+ mtd_free(mtd);
+ }
+ mtdnext = mtd_alloc();
+ sc->txb_inuse = 0;
+
+ sc->sc_if.if_timer = 0;
+ sc->sc_if.if_flags &= ~(IFF_RUNNING | IFF_UP);
+
+ splx(s);
+ return (0);
+}
+
+/*
+ * Called if any Tx packets remain unsent after 5 seconds,
+ * In all cases we just reset the chip, and any retransmission
+ * will be handled by higher level protocol timeouts.
+ */
+void
+snwatchdog(unit)
+ int unit;
+{
+ struct sn_softc *sc = sncd.cd_devs[unit];
+ int temp;
+
+ if (mtdhead && mtdhead->mtd_buf) {
+ /* something still pending for transmit */
+ if (mtdhead->mtd_txp->status == 0)
+ log(LOG_ERR, "%s%d: Tx - timeout\n",
+ sc->sc_if.if_name, sc->sc_if.if_unit);
+ else
+ log(LOG_ERR, "%s%d: Tx - lost interrupt\n",
+ sc->sc_if.if_name, sc->sc_if.if_unit);
+ temp = sc->sc_if.if_flags & IFF_UP;
+ snreset(sc);
+ sc->sc_if.if_flags |= temp;
+ }
+}
+
+/*
+ * stuff packet into sonic (at splnet)
+ */
+int
+sonicput(sc, m0)
+ struct sn_softc *sc;
+ struct mbuf *m0;
+{
+ struct sonic_reg *csr = sc->sc_csr;
+ unsigned char *buff, *buffer, *data;
+ struct TXpkt *txp;
+ struct mtd *mtdnew;
+ struct mbuf *m;
+ int i, len = 0, totlen = 0;
+
+ /* grab the replacement mtd */
+ if ((mtdnew = mtd_alloc()) == 0)
+ return (0);
+
+ /* We are guaranteed, if we get here, that the xmit buffer is free. */
+ buff = buffer = p_tba + sc->txb_new * TXBSIZE;
+
+ /* this packet goes to mdtnext fill in the TDA */
+ mtdnext->mtd_buf = buffer;
+ txp = mtdnext->mtd_txp;
+ SWR(txp->config, 0);
+
+ for (m = m0; m; m = m->m_next) {
+ data = mtod(m, u_char *);
+ len = m->m_len;
+ totlen += len;
+ bcopy(data, buff, len);
+ buff += len;
+ }
+ if (totlen >= TXBSIZE) {
+ panic("packet overflow in sonicput.");
+ }
+ SWR(txp->u[0].frag_ptrlo, LOWER(buffer));
+ SWR(txp->u[0].frag_ptrhi, UPPER(buffer));
+ SWR(txp->u[0].frag_size, totlen);
+
+ if (len < ETHERMIN + sizeof(struct ether_header)) {
+ int pad = ETHERMIN + sizeof(struct ether_header) - totlen;
+printf("Padding %d to %d bytes\n", totlen, totlen+pad);
+ bzero(buffer + totlen, pad);
+ SWR(txp->u[0].frag_size, pad + SRD(txp->u[0].frag_size));
+ totlen = ETHERMIN + sizeof(struct ether_header);
+ }
+ SWR(txp->frag_count, 1);
+ SWR(txp->pkt_size, totlen);
+
+ /* link onto the next mtd that will be used */
+ SWR(txp->u[0].tlink, LOWER(mtdnew->mtd_txp) | EOL);
+
+ if (mtdhead == 0) {
+ /* no current transmit list start with this one */
+ mtdtail = mtdhead = mtdnext;
+ csr->s_ctda = LOWER(txp);
+ } else {
+ /*
+ * have a transmit list append it to end note
+ * mtdnext is already physicaly linked to mtdtail in
+ * mtdtail->mtd_txp->u[mtdtail->mtd_txp->frag_count].tlink
+ */
+ SWR(mtdtail->mtd_txp->u[mtdtail->mtd_txp->frag_count].tlink,
+ SRD(mtdtail->mtd_txp->u[mtdtail->mtd_txp->frag_count].tlink) & ~EOL);
+ mtdtail = mtdnext;
+ }
+ mtdnext->mtd_link = mtdnew;
+ mtdnext = mtdnew;
+
+ /* make sure chip is running */
+ wbflush();
+ csr->s_cr = CR_TXP;
+ wbflush();
+ sc->sc_if.if_timer = 5; /* 5 seconds to watch for failing to transmit */
+ return (totlen);
+}
+
+/*
+ * Read out the ethernet address from the cam. It is stored
+ * there by the boot when doing a loopback test. Thus we don't
+ * have to fetch it from nv ram.
+ */
+int
+sngetaddr(sc)
+ struct sn_softc *sc;
+{
+ unsigned i, x, y;
+ char *cp, *ea;
+
+ sc->sc_csr->s_cr = CR_RST;
+ wbflush();
+ sc->sc_csr->s_cep = 15; /* For some reason, Apple fills top first. */
+ i = sc->sc_csr->s_cap2;
+ wbflush();
+ sc->sc_enaddr[5] = i >> 8;
+ sc->sc_enaddr[4] = i;
+ i = sc->sc_csr->s_cap1;
+ wbflush();
+ sc->sc_enaddr[3] = i >> 8;
+ sc->sc_enaddr[2] = i;
+ i = sc->sc_csr->s_cap0;
+ wbflush();
+ sc->sc_enaddr[1] = i >> 8;
+ sc->sc_enaddr[0] = i;
+
+ sc->sc_csr->s_cr = 0;
+ wbflush();
+ return (0);
+}
+
+void sonictxint __P((struct sn_softc *));
+void sonicrxint __P((struct sn_softc *));
+
+int sonic_read __P((struct sn_softc *, struct RXpkt *));
+struct mbuf *sonic_get __P((struct sn_softc *, struct ether_header *, int));
+
+void
+mtd_free(mtd)
+ struct mtd *mtd;
+{
+ mtd->mtd_link = mtdfree;
+ mtdfree = mtd;
+}
+
+struct mtd *
+mtd_alloc()
+{
+ struct mtd *mtd = mtdfree;
+
+ if (mtd) {
+ mtdfree = mtd->mtd_link;
+ mtd->mtd_link = 0;
+ }
+ return (mtd);
+}
+
+/*
+ * CAM support
+ */
+void
+caminitialise()
+{
+ int i;
+
+ for (i = 0; i < MAXCAM; i++)
+ SWR(p_cda->desc[i].cam_ep, i);
+ SWR(p_cda->enable, 0);
+}
+
+void
+camentry(entry, ea)
+ int entry;
+ unsigned char *ea;
+{
+ SWR(p_cda->desc[entry].cam_ep, entry);
+ SWR(p_cda->desc[entry].cam_ap2, (ea[5] << 8) | ea[4]);
+ SWR(p_cda->desc[entry].cam_ap1, (ea[3] << 8) | ea[2]);
+ SWR(p_cda->desc[entry].cam_ap0, (ea[1] << 8) | ea[0]);
+ SWR(p_cda->enable, SRD(p_cda->enable) | (1 << entry));
+}
+
+void
+camprogram(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr;
+ int timeout;
+ int i;
+
+ csr = sc->sc_csr;
+ csr->s_cdp = LOWER(p_cda);
+ csr->s_cdc = MAXCAM;
+ csr->s_cr = CR_LCAM;
+ wbflush();
+
+ timeout = 10000;
+ while (csr->s_cr & CR_LCAM && timeout--)
+ continue;
+ if (timeout == 0) {
+ /* XXX */
+ panic("sonic: CAM initialisation failed\n");
+ }
+ timeout = 10000;
+ while ((csr->s_isr & ISR_LCD) == 0 && timeout--)
+ continue;
+
+ if (csr->s_isr & ISR_LCD)
+ csr->s_isr = ISR_LCD;
+ else
+ printf("sonic: CAM initialisation without interrupt\n");
+}
+
+#if 0
+void
+camdump(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr = sc->sc_csr;
+ int i;
+
+ printf("CAM entries:\n");
+ csr->s_cr = CR_RST;
+ wbflush();
+
+ for (i = 0; i < 16; i++) {
+ ushort ap2, ap1, ap0;
+ csr->s_cep = i;
+ wbflush();
+ ap2 = csr->s_cap2;
+ ap1 = csr->s_cap1;
+ ap0 = csr->s_cap0;
+ printf("%d: ap2=0x%x ap1=0x%x ap0=0x%x\n", i, ap2, ap1, ap0);
+ }
+ printf("CAM enable 0x%x\n", csr->s_cep);
+
+ csr->s_cr = 0;
+ wbflush();
+}
+#endif
+
+void
+initialise_tda(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr;
+ struct mtd *mtd;
+ int i;
+
+ csr = sc->sc_csr;
+
+ mtdfree = mtdhead = mtdtail = (struct mtd *) 0;
+
+ for (i = 0; i < NTDA; i++) {
+ mtd = &mtda[i];
+ mtd->mtd_txp = &p_tda[i];
+ mtd->mtd_buf = 0;
+ mtd_free(mtd);
+ }
+ mtdnext = mtd_alloc();
+
+ csr->s_utda = UPPER(p_tda);
+}
+
+void
+initialise_rda(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr;
+ int i;
+
+ csr = sc->sc_csr;
+
+ /* link the RDA's together into a circular list */
+ for (i = 0; i < (NRDA - 1); i++) {
+ SWR(p_rda[i].rlink, LOWER(&p_rda[i + 1]));
+ SWR(p_rda[i].in_use, 1);
+ }
+ SWR(p_rda[NRDA - 1].rlink, LOWER(&p_rda[0]) | EOL);
+ SWR(p_rda[NRDA - 1].in_use, 1);
+
+ /* mark end of receive descriptor list */
+ sc->sc_lrxp = &p_rda[NRDA - 1];
+
+ sc->sc_rxmark = 0;
+
+ csr->s_urda = UPPER(&p_rda[0]);
+ csr->s_crda = LOWER(&p_rda[0]);
+ wbflush();
+}
+
+void
+initialise_rra(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr;
+ int i;
+
+ csr = sc->sc_csr;
+
+ csr->s_eobc = RBASIZE / 2 - 2; /* must be >= MAXETHERPKT */
+ csr->s_urra = UPPER(p_rra);
+ csr->s_rsa = LOWER(p_rra);
+ csr->s_rea = LOWER(&p_rra[NRRA]);
+ csr->s_rrp = LOWER(p_rra);
+
+ /* fill up SOME of the rra with buffers */
+ for (i = 0; i < NRBA; i++) {
+ SWR(p_rra[i].buff_ptrhi, UPPER(&p_rba[i * RBASIZE]));
+ SWR(p_rra[i].buff_ptrlo, LOWER(&p_rba[i * RBASIZE]));
+ SWR(p_rra[i].buff_wchi, UPPER(RBASIZE / 2));
+ SWR(p_rra[i].buff_wclo, LOWER(RBASIZE / 2));
+ }
+ sc->sc_rramark = NRBA;
+ csr->s_rwp = LOWER(&p_rra[sc->sc_rramark]);
+ wbflush();
+}
+
+void
+initialise_tba(sc)
+ struct sn_softc *sc;
+{
+ int i;
+
+ sc->txb_cnt = NTXB;
+ sc->txb_inuse = 0;
+ sc->txb_new = 0;
+}
+
+int
+snintr(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr = sc->sc_csr;
+ int isr;
+
+ while (isr = (csr->s_isr & ISR_ALL)) {
+printf("snintr: %x.\n", isr);
+ /* scrub the interrupts that we are going to service */
+ csr->s_isr = isr;
+ wbflush();
+
+ if (isr & (ISR_BR | ISR_LCD | ISR_PINT | ISR_TC))
+ printf("sonic: unexpected interrupt status 0x%x\n", isr);
+
+ if (isr & (ISR_TXDN | ISR_TXER))
+ sonictxint(sc);
+
+ if (isr & ISR_PKTRX)
+ sonicrxint(sc);
+
+ if (isr & (ISR_HBL | ISR_RDE | ISR_RBE | ISR_RBAE | ISR_RFO)) {
+ if (isr & ISR_HBL)
+ printf("sonic: no heartbeat\n");
+ if (isr & ISR_RDE)
+ printf("sonic: receive descriptors exhausted\n");
+ if (isr & ISR_RBE)
+ printf("sonic: receive buffers exhausted\n");
+ if (isr & ISR_RBAE)
+ printf("sonic: receive buffer area exhausted\n");
+ if (isr & ISR_RFO)
+ printf("sonic: receive FIFO overrun\n");
+ }
+ if (isr & (ISR_CRC | ISR_FAE | ISR_MP)) {
+#ifdef notdef
+ if (isr & ISR_CRC)
+ sc->sc_crctally++;
+ if (isr & ISR_FAE)
+ sc->sc_faetally++;
+ if (isr & ISR_MP)
+ sc->sc_mptally++;
+#endif
+ }
+ snstart(&sc->sc_if);
+ }
+ return (1);
+}
+
+/*
+ * Transmit interrupt routine
+ */
+void
+sonictxint(sc)
+ struct sn_softc *sc;
+{
+ struct TXpkt *txp;
+ struct sonic_reg *csr;
+ struct mtd *mtd;
+
+ if (mtdhead == (struct mtd *) 0)
+ return;
+
+ csr = sc->sc_csr;
+
+ while (mtd = mtdhead) {
+ if (mtd->mtd_buf == 0)
+ break;
+
+ txp = mtd->mtd_txp;
+
+ if (SRD(txp->status) == 0) /* it hasn't really gone yet */
+ return;
+
+ if (ethdebug) {
+ struct ether_header *eh;
+
+ eh = (struct ether_header *) mtd->mtd_buf;
+ printf("xmit status=0x%x len=%d type=0x%x from %s",
+ txp->status,
+ txp->pkt_size,
+ htons(eh->ether_type),
+ ether_sprintf(eh->ether_shost));
+ printf(" (to %s)\n", ether_sprintf(eh->ether_dhost));
+ }
+ sc->txb_inuse--;
+ mtd->mtd_buf = 0;
+ mtdhead = mtd->mtd_link;
+
+ mtd_free(mtd);
+
+ /* XXX - Do stats here. */
+
+ if ((SRD(txp->status) & TCR_PTX) == 0) {
+ printf("sonic: Tx packet status=0x%x\n", txp->status);
+
+ if (mtdhead != mtdnext) {
+ printf("resubmitting remaining packets\n");
+ csr->s_ctda = LOWER(mtdhead->mtd_txp);
+ csr->s_cr = CR_TXP;
+ wbflush();
+ return;
+ }
+ }
+ }
+ /* mtdhead should be at mtdnext (go) */
+ assert(mtdhead == mtdnext);
+ assert(mtdhead->mtd_link == 0);
+ mtdhead = 0;
+}
+
+/*
+ * Receive interrupt routine
+ */
+void
+sonicrxint(sc)
+ struct sn_softc *sc;
+{
+ struct sonic_reg *csr = sc->sc_csr;
+ struct RXpkt *rxp;
+ u_long addr;
+ int orra;
+
+ rxp = &p_rda[sc->sc_rxmark];
+
+ while (SRD(rxp->in_use) == 0) {
+ unsigned status = SRD(rxp->status);
+ if ((status & RCR_LPKT) == 0)
+ printf("sonic: more than one packet in RBA!\n");
+ assert(PSNSEQ(SRD(rxp->seq_no)) == 0);
+
+ if (status & RCR_PRX) {
+ if (sonic_read(sc, rxp)) {
+ sc->sc_if.if_ipackets++;
+ sc->sc_sum.ls_ipacks++;
+ sc->sc_missed = 0;
+ }
+ } else
+ sc->sc_if.if_ierrors++;
+
+ /*
+ * give receive buffer area back to chip XXX what buffer
+ * did the sonic use for this descriptor answer look at
+ * the rba sequence number !!
+ */
+ orra = RBASEQ(SRD(rxp->seq_no)) & RRAMASK;
+
+ assert(SRD(rxp->pkt_ptrhi) == SRD(p_rra[orra].buff_ptrhi));
+ assert(SRD(rxp->pkt_ptrlo) == SRD(p_rra[orra].buff_ptrlo));
+ assert(SRD(p_rra[orra].buff_wclo));
+
+ /*
+ * orra is now empty of packets and can be freed if
+ * sonic read didnt copy it out then we would have to
+ * wait !!
+ * (dont bother add it back in again straight away)
+ */
+ p_rra[sc->sc_rramark] = p_rra[orra];
+
+ /* zap old rra for fun */
+ p_rra[orra].buff_wchi = 0;
+ p_rra[orra].buff_wclo = 0;
+
+ sc->sc_rramark = (sc->sc_rramark + 1) & RRAMASK;
+ csr->s_rwp = LOWER(&p_rra[sc->sc_rramark]);
+ wbflush();
+
+ /*
+ * give receive descriptor back to chip simple
+ * list is circular
+ */
+ SWR(rxp->in_use, 1);
+ SWR(rxp->rlink, SRD(rxp->rlink) | EOL);
+ SWR(sc->sc_lrxp->rlink, SRD(sc->sc_lrxp->rlink) & ~EOL);
+ sc->sc_lrxp = rxp;
+
+ if (++sc->sc_rxmark >= NRDA)
+ sc->sc_rxmark = 0;
+ rxp = &p_rda[sc->sc_rxmark];
+ }
+}
+
+/*
+ * sonic_read -- pull packet off interface and forward to
+ * appropriate protocol handler
+ */
+int
+sonic_read(sc, rxp)
+ struct sn_softc *sc;
+ struct RXpkt *rxp;
+{
+ struct ifnet *ifp = &sc->sc_if;
+ /*extern char *ether_sprintf();*/
+ struct ether_header *et;
+ struct mbuf *m;
+ int len, off, i;
+ caddr_t pkt;
+
+ /*
+ * Get input data length.
+ * Get pointer to ethernet header (in input buffer).
+ * Deal with trailer protocol: if type is PUP trailer
+ * get true type from first 16-bit word past data.
+ * Remember that type was trailer by setting off.
+ */
+
+ len = SRD(rxp->byte_count) - sizeof(struct ether_header) - FCSSIZE;
+ pkt = (caddr_t)((SRD(rxp->pkt_ptrhi) << 16) | SRD(rxp->pkt_ptrlo));
+ et = (struct ether_header *)pkt;
+
+ if (ethdebug) {
+ printf("rcvd 0x%x status=0x%x, len=%d type=0x%x from %s",
+ et, rxp->status, len, htons(et->ether_type),
+ ether_sprintf(et->ether_shost));
+ printf(" (to %s)\n", ether_sprintf(et->ether_dhost));
+ }
+ if (len < ETHERMIN || len > ETHERMTU) {
+ printf("sonic: invalid packet length %d bytes\n", len);
+ return (0);
+ }
+
+#if NBPFILTER > 0
+ /*
+ * Check if there's a bpf filter listening on this interface.
+ * If so, hand off the raw packet to enet, then discard things
+ * not destined for us (but be sure to keep broadcast/multicast).
+ */
+ if (sc->sc_if.if_bpf) {
+ bpf_tap(sc->sc_if.if_bpf, pkt,
+ len + sizeof(struct ether_header));
+ if ((ifp->if_flags & IFF_PROMISC) != 0 &&
+ (et->ether_dhost[0] & 1) == 0 && /* !mcast and !bcast */
+ bcmp(et->ether_dhost, sc->sc_enaddr,
+ sizeof(et->ether_dhost)) != 0)
+ return;
+ }
+#endif
+ m = sonic_get(sc, et, len);
+ if (m == NULL)
+ return (0);
+ ether_input(ifp, et, m);
+ return(1);
+}
+
+#define sonicdataaddr(eh, off, type) ((type)(((caddr_t)((eh)+1)+(off))))
+
+/*
+ * munge the received packet into an mbuf chain
+ * because we are using stupid buffer management this
+ * is slow.
+ */
+struct mbuf *
+sonic_get(sc, eh, datalen)
+ struct sn_softc *sc;
+ struct ether_header *eh;
+ int datalen;
+{
+ struct mbuf *m;
+ struct mbuf *top = 0, **mp = &top;
+ int len;
+ char *spkt = sonicdataaddr(eh, 0, caddr_t);
+ char *epkt = spkt + datalen;
+ char *cp = spkt;
+
+ epkt = cp + datalen;
+ MGETHDR(m, M_DONTWAIT, MT_DATA);
+ if (m == 0)
+ return (0);
+ m->m_pkthdr.rcvif = &sc->sc_if;
+ m->m_pkthdr.len = datalen;
+ m->m_len = MHLEN;
+
+ while (datalen > 0) {
+ if (top) {
+ MGET(m, M_DONTWAIT, MT_DATA);
+ if (m == 0) {
+ m_freem(top);
+ return (0);
+ }
+ m->m_len = MLEN;
+ }
+ len = min(datalen, epkt - cp);
+ if (len >= MINCLSIZE) {
+ MCLGET(m, M_DONTWAIT);
+ if (m->m_flags & M_EXT)
+ m->m_len = len = min(len, MCLBYTES);
+ else
+ len = m->m_len;
+ } else {
+ /*
+ * Place initial small packet/header at end of mbuf.
+ */
+ if (len < m->m_len) {
+ if (top == 0 && len + max_linkhdr <= m->m_len)
+ m->m_data += max_linkhdr;
+ m->m_len = len;
+ } else
+ len = m->m_len;
+ }
+ bcopy(cp, mtod(m, caddr_t), (unsigned) len);
+ cp += len;
+ *mp = m;
+ mp = &m->m_next;
+ datalen -= len;
+ if (cp == epkt)
+ cp = spkt;
+ }
+ return (top);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-30 16:54:53 +0000