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Fix multicast filter programming.

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This commit is contained in:
thorpej 2002-07-01 22:42:47 +00:00
parent a74fa420bb
commit 7ff40c446d
1 changed files with 28 additions and 32 deletions
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60
sys/dev/pci/if_bge.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_bge.c,v 1.12 2002/06/28 18:46:46 thorpej Exp $ */
/* $NetBSD: if_bge.c,v 1.13 2002/07/01 22:42:47 thorpej Exp $ */
/*
* Copyright (c) 2001 Wind River Systems
@ -144,7 +144,6 @@ void bge_ifmedia_sts(struct ifnet *, struct ifmediareq *);
u_int8_t bge_eeprom_getbyte(struct bge_softc *, int, u_int8_t *);
int bge_read_eeprom(struct bge_softc *, caddr_t, int, int);
u_int32_t bge_crc(struct bge_softc *, caddr_t);
void bge_setmulti(struct bge_softc *);
void bge_handle_events(struct bge_softc *);
@ -958,26 +957,6 @@ bge_init_tx_ring(sc)
return(0);
}
#define BGE_POLY 0xEDB88320
u_int32_t
bge_crc(sc, addr)
struct bge_softc *sc;
caddr_t addr;
{
u_int32_t idx, bit, data, crc;
/* Compute CRC for the address value. */
crc = 0xFFFFFFFF; /* initial value */
for (idx = 0; idx < 6; idx++) {
for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1)
crc = (crc >> 1) ^ (((crc ^ data) & 1) ? BGE_POLY : 0);
}
return(crc & 0x7F);
}
void
bge_setmulti(sc)
struct bge_softc *sc;
@ -990,24 +969,41 @@ bge_setmulti(sc)
u_int32_t h;
int i;
if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
for (i = 0; i < 4; i++)
CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), 0xFFFFFFFF);
return;
}
/* First, zot all the existing filters. */
for (i = 0; i < 4; i++)
CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), 0);
if (ifp->if_flags & IFF_PROMISC)
goto allmulti;
/* Now program new ones. */
ETHER_FIRST_MULTI(step, ac, enm);
while (enm != NULL) {
h = bge_crc(sc, LLADDR((struct sockaddr_dl *)enm->enm_addrlo));
if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
/*
* 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.)
*/
goto allmulti;
}
h = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN);
/* Just want the 7 least-significant bits. */
h &= 0x7f;
hashes[(h & 0x60) >> 5] |= 1 << (h & 0x1F);
ETHER_NEXT_MULTI(step, enm);
}
ifp->if_flags &= ~IFF_ALLMULTI;
goto setit;
allmulti:
ifp->if_flags |= IFF_ALLMULTI;
hashes[0] = hashes[1] = hashes[2] = hashes[3] = 0xffffffff;
setit:
for (i = 0; i < 4; i++)
CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), hashes[i]);
}