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NetBSD/sys/arch/pica/dev/if_sn.c

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/* $NetBSD: if_sn.c,v 1.9 1997/03/15 18:10:25 is Exp $ */
/*
* 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 <machine/autoconf.h>
#include <net/if.h>
#include <net/if_ether.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_inarp.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
#include <pica/dev/dma.h>
#define SONICDW 32
typedef unsigned char uchar;
#include <mips/cpuregs.h> /* XXX */
#include <pica/dev/if_sn.h>
#define SWR(a, x) (a) = (x)
#define SRD(a) ((a) & 0xffff)
/*
* 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 ethercom sc_ec;
#define sc_if sc_ec.ec_if /* network visible interface */
struct sonic_reg *sc_csr; /* hardware pointer */
dma_softc_t __dma; /* stupid macro ... */
dma_softc_t *dma; /* dma mapper control */
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 */
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 cfattach sn_ca = {
sizeof(struct sn_softc), snmatch, snattach
};
struct cfdriver sn_cd = {
NULL, "sn", DV_IFNET
};
#include <assert.h>
void
__assert(file, line, failedexpr)
const char *file, *failedexpr;
int line;
{
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((struct ifnet *ifp));
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 UPPER(x) ((unsigned)(x) >> 16)
#define LOWER(x) ((unsigned)(x) & 0xffff)
#define NRRA 32 /* # receive resource descriptors */
#define RRAMASK 0x1f /* why it must be poer 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 recieve 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 requiered for descriptors
*/
#define DESC_SIZE (RRASIZE + CDASIZE + RDASIZE + TDASIZE + SONICALIGN - 1)
/*
* This should really be 'allocated' but for now we
* 'hardwire' it.
*/
#define SONICBUF 0xa0010000
/*
* Nicely aligned pointers into the sonicbuffers
* p_ points at physical (K1_SEG) addresses.
* v_ is dma viritual address used by sonic.
*/
struct RXrsrc *p_rra; /* receiver resource descriptors */
struct RXrsrc *v_rra;
struct RXpkt *p_rda; /* receiver desriptors */
struct RXpkt *v_rda;
struct TXpkt *p_tda; /* transmitter descriptors */
struct TXpkt *v_tda;
struct CDA *p_cda; /* CAM descriptors */
struct CDA *v_cda;
char *p_rba; /* receive buffer area base */
char *v_rba;
/* Meta transmit descriptors */
struct mtd {
struct mtd *mtd_link;
struct TXpkt *mtd_txp;
struct mbuf *mtd_mbuf;
} 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, uchar *ap));
int sninit __P((struct sn_softc *sc));
int snstop __P((struct sn_softc *sc));
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;
/* XXX CHECK BUS */
/* make sure that we're looking for this type of device. */
if (!BUS_MATCHNAME(ca, "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;
{
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 p, pp;
uchar myaddr[ETHER_ADDR_LEN];
sc->sc_csr = (struct sonic_reg *)BUS_CVTADDR(ca);
sc->dma = &sc->__dma;
sn_dma_init(sc->dma, FRAGMAX * NTDA
+ (NRBA * RBASIZE / PICA_DMA_PAGE_SIZE) + 1
+ (DESC_SIZE * 2 / PICA_DMA_PAGE_SIZE) + 1);
/*
* because the sonic is basicly 16bit device it 'concatenates'
* a higher buffer address to a 16 bit offset this will cause wrap
* around problems near the end of 64k !!
*/
p = SONICBUF;
pp = SONICBUF - (FRAGMAX * NTDA * PICA_DMA_PAGE_SIZE);
if ((p ^ (p + TDASIZE)) & 0x10000)
p = (p + 0x10000) & ~0xffff;
p_tda = (struct TXpkt *) p;
v_tda = (struct TXpkt *)(p - pp + sc->dma->dma_va);
p += TDASIZE;
if ((p ^ (p + RRASIZE + CDASIZE)) & 0x10000)
p = (p + 0x10000) & ~0xffff;
p_rra = (struct RXrsrc *) p;
v_rra = (struct RXrsrc *)(p - pp + sc->dma->dma_va);
p += RRASIZE;
if ((p ^ (p + RDASIZE)) & 0x10000)
p = (p + 0x10000) & ~0xffff;
p_rda = (struct RXpkt *) p;
v_rda = (struct RXpkt *)(p - pp + sc->dma->dma_va);
p += RDASIZE;
p_cda = (struct CDA *) p;
v_cda = (struct CDA *)(p - pp + sc->dma->dma_va);
p += CDASIZE;
p += PICA_DMA_PAGE_SIZE - (p & (PICA_DMA_PAGE_SIZE -1));
p_rba = (char *)p;
v_rba = (char *)(p - pp + sc->dma->dma_va);
p += NRBA * RBASIZE;
DMA_MAP(sc->dma, (caddr_t)SONICBUF, p - SONICBUF, SONICBUF - pp);
#if 0
camdump(sc);
#endif
sngetaddr(sc, myaddr);
printf(" address %s\n", ether_sprintf(myaddr));
#if 0
printf("\nsonic buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x rba=0x%x\n",
p_rra, p_cda, p_rda, p_tda, p_rba);
printf("sonic buffers: rra=0x%x cda=0x%x rda=0x%x tda=0x%x rba=0x%x\n",
v_rra, v_cda, v_rda, v_tda, v_rba);
printf("mapped to offset 0x%x size 0x%x\n", SONICBUF - pp, p - SONICBUF);
#endif
BUS_INTR_ESTABLISH(ca, (intr_handler_t)snintr, (void *)sc);
bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
ifp->if_softc = sc;
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, myaddr);
}
int
snioctl(ifp, cmd, data)
struct ifnet *ifp;
u_long cmd;
caddr_t data;
{
struct ifaddr *ifa;
struct sn_softc *sc = ifp->if_softc;
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(sc);
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_addr);
} else {
/* XXX
* add an extra i/f address to
* sonic filter
*/
}
}
(void)sninit(sc);
break;
#endif /* NS */
default:
(void)sninit(sc);
break;
}
break;
case SIOCSIFFLAGS:
if ((ifp->if_flags & IFF_UP) == 0 &&
ifp->if_flags & IFF_RUNNING) {
snstop(sc);
ifp->if_flags &= ~IFF_RUNNING;
} else if (ifp->if_flags & IFF_UP &&
(ifp->if_flags & IFF_RUNNING) == 0)
(void)sninit(sc);
/*
* 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 = ifp->if_softc;
struct mbuf *m;
int len;
if ((sc->sc_if.if_flags & IFF_RUNNING) == 0)
return;
IF_DEQUEUE(&sc->sc_if.if_snd, m);
if (m == 0)
return;
/*
* 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.
*/
if (!sonicput(sc, m)) { /* not enough space */
IF_PREPEND(&sc->sc_if.if_snd, m);
}
#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
sc->sc_if.if_opackets++; /* # of pkts */
sc->sc_sum.ls_opacks++; /* # of pkts */
}
/*
* 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, u_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 *));
/*
* 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);
sninit(sc);
}
int
sninit(sc)
struct sn_softc *sc;
{
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);
/* enable the chip */
csr->s_cr = 0;
wbflush();
/* program the CAM with our address */
caminitialise();
camentry(0, LLADDR(sc->sc_if.if_sadl));
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);
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(sc)
struct sn_softc *sc;
{
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;
if (mtd->mtd_mbuf)
m_freem(mtd->mtd_mbuf);
mtd->mtd_mbuf = 0;
mtd_free(mtd);
}
mtdnext = mtd_alloc();
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(ifp)
struct ifnet *ifp;
{
struct sn_softc *sc = ifp->if_softc;
int temp;
if (mtdhead && mtdhead->mtd_mbuf) {
/* something still pending for transmit */
if (mtdhead->mtd_txp->status == 0)
log(LOG_ERR, "%s: Tx - timeout\n",
sc->sc_dev.dv_xname);
else
log(LOG_ERR, "%s: Tx - lost interrupt\n",
sc->sc_dev.dv_xname);
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;
struct TXpkt *txp;
struct mtd *mtdnew;
struct mbuf *m;
int len = 0, fr = 0;
int i;
int fragoffset; /* Offset in viritual dma space for fragment */
/* grab the replacement mtd */
if ((mtdnew = mtd_alloc()) == 0)
return (0);
/* this packet goes to mdtnext fill in the TDA */
mtdnext->mtd_mbuf = m0;
txp = mtdnext->mtd_txp;
SWR(txp->config, 0);
fragoffset = (txp - p_tda) * FRAGMAX * PICA_DMA_PAGE_SIZE;
/*
* Now fill in the fragments. Each fragment maps to it's
* own dma page. Fragments crossing a dma page boundary
* are split up in two fragments. This is somewhat stupid
* because the dma mapper can do the work, but it helps
* keeping the fragments in order. (read lazy programmer).
*/
for (m = m0; m; m = m->m_next) {
unsigned va = (unsigned) mtod(m, caddr_t);
int resid = m->m_len;
if(resid != 0) {
MachHitFlushDCache(va, resid);
DMA_MAP(sc->dma, (caddr_t)va, resid, fragoffset);
}
len += resid;
while (resid) {
unsigned pa;
unsigned n;
pa = sc->dma->dma_va + (va & PGOFSET) + fragoffset;
n = resid;
if (n > NBPG - (va & PGOFSET)) {
n = NBPG - (va & PGOFSET);
}
if (fr < FRAGMAX) {
SWR(txp->u[fr].frag_ptrlo, LOWER(pa));
SWR(txp->u[fr].frag_ptrhi, UPPER(pa));
SWR(txp->u[fr].frag_size, n);
}
fr++;
va += n;
resid -= n;
fragoffset += PICA_DMA_PAGE_SIZE;
}
}
/*
* pad out last fragment for minimum size
*/
if (len < ETHERMIN + sizeof(struct ether_header) && fr < FRAGMAX) {
int pad = ETHERMIN + sizeof(struct ether_header) - len;
static char zeros[64];
unsigned pa;
DMA_MAP(sc->dma, (caddr_t)zeros, pad, fragoffset);
pa = sc->dma->dma_va + ((unsigned)zeros & PGOFSET) + fragoffset;
SWR(txp->u[fr].frag_ptrlo, LOWER(pa));
SWR(txp->u[fr].frag_ptrhi, UPPER(pa));
SWR(txp->u[fr].frag_size, pad);
fr++;
len = ETHERMIN + sizeof(struct ether_header);
}
DMA_START(sc->dma, (caddr_t)0, 0, 0); /* Flush dma tlb */
if (fr > FRAGMAX) {
mtd_free(mtdnew);
m_freem(m0);
log(LOG_ERR, "%s: tx too many fragments %d\n",
sc->sc_dev.dv_xname, fr);
sc->sc_if.if_oerrors++;
return (len);
}
SWR(txp->frag_count, fr);
SWR(txp->pkt_size, len);
/* link onto the next mtd that will be used */
SWR(txp->u[fr].tlink, LOWER(v_tda + (mtdnew->mtd_txp - p_tda)) | EOL);
if (mtdhead == 0) {
/* no current transmit list start with this one */
mtdtail = mtdhead = mtdnext;
csr->s_ctda = LOWER(v_tda + (txp - p_tda));
} 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 (len);
}
/*
* 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, ap)
struct sn_softc *sc;
uchar *ap;
{
unsigned i, x, y;
char *cp, *ea;
#if 1
sc->sc_csr->s_cr = CR_RST;
wbflush();
sc->sc_csr->s_cep = 0;
i = sc->sc_csr->s_cap2;
wbflush();
ap[5] = i >> 8;
ap[4] = i;
i = sc->sc_csr->s_cap1;
wbflush();
ap[3] = i >> 8;
ap[2] = i;
i = sc->sc_csr->s_cap0;
wbflush();
ap[1] = i >> 8;
ap[0] = i;
sc->sc_csr->s_cr = 0;
wbflush();
#else
ap[0] = 0x08;
ap[1] = 0x00;
ap[2] = 0x20;
ap[3] = 0xa0;
ap[4] = 0x66;
ap[5] = 0x54;
#endif
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;
u_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(v_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_mbuf = (struct mbuf *) 0;
mtd_free(mtd);
}
mtdnext = mtd_alloc();
csr->s_utda = UPPER(v_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(&v_rda[i + 1]));
SWR(p_rda[i].in_use, 1);
}
SWR(p_rda[NRDA - 1].rlink, LOWER(&v_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(&v_rda[0]);
csr->s_crda = LOWER(&v_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(v_rra);
csr->s_rsa = LOWER(v_rra);
csr->s_rea = LOWER(&v_rra[NRRA]);
csr->s_rrp = LOWER(v_rra);
csr->s_rsc = 0;
/* fill up SOME of the rra with buffers */
for (i = 0; i < NRBA; i++) {
SWR(p_rra[i].buff_ptrhi, UPPER(&v_rba[i * RBASIZE]));
SWR(p_rra[i].buff_ptrlo, LOWER(&v_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(&v_rra[sc->sc_rramark]);
wbflush();
}
int
snintr(sc)
struct sn_softc *sc;
{
struct sonic_reg *csr = sc->sc_csr;
int isr;
while (isr = (csr->s_isr & ISR_ALL)) {
/* 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
}
}
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) {
struct mbuf *m = mtd->mtd_mbuf;
if (m == 0)
break;
txp = mtd->mtd_txp;
if (SRD(txp->status) == 0) /* it hasn't really gone yet */
return;
if (ethdebug) {
struct ether_header *eh = mtod(m, struct ether_header *);
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));
}
m_freem(m);
mtd->mtd_mbuf = 0;
mtdhead = mtd->mtd_link;
mtd_free(mtd);
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;
/* and start feeding any queued packets to chip */
while (1) {
struct mbuf *m;
IF_DEQUEUE(&sc->sc_if.if_snd, m);
if (m == 0) /* nothing left to send */
break;
if (!sonicput(sc, m)) { /* not enough space */
IF_PREPEND(&sc->sc_if.if_snd, m);
break;
}
}
}
/*
* 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));
if(SRD(rxp->pkt_ptrlo) != SRD(p_rra[orra].buff_ptrlo))
printf("%x,%x\n",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(&v_rra[sc->sc_rramark]);
wbflush();
/*
* give recieve 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;
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));
pkt = pkt - v_rba + p_rba;
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 (ifp->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, LLADDR(ifp->if_sadl),
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 recieved packet into an mbuf chain
* because we are using stupif 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);
}
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