diff options
| author | obrien <obrien@FreeBSD.org> | 2003-11-13 20:55:53 +0000 |
|---|---|---|
| committer | obrien <obrien@FreeBSD.org> | 2003-11-13 20:55:53 +0000 |
| commit | ae5ec4308110fc11464507f63b5d9a1908a426b8 (patch) | |
| tree | 9f53fad8ba546c1e709992d118c397465dd5b01f /sys/dev/nge | |
| parent | a9128aec4ed6ce7c8d433530c6899775e94045d0 (diff) | |
| download | FreeBSD-src-ae5ec4308110fc11464507f63b5d9a1908a426b8.zip FreeBSD-src-ae5ec4308110fc11464507f63b5d9a1908a426b8.tar.gz | |
Try to create some sort of consistency in how the routings to find the
multicast hash are written. There are still two distinct algorithms used,
and there actually isn't any reason each driver should have its own copy
of this function as they could all share one copy of it (if it grew an
additional argument).
Diffstat (limited to 'sys/dev/nge')
| -rw-r--r-- | sys/dev/nge/if_nge.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/sys/dev/nge/if_nge.c b/sys/dev/nge/if_nge.c index 0fca198..92aed75 100644 --- a/sys/dev/nge/if_nge.c +++ b/sys/dev/nge/if_nge.c @@ -187,7 +187,7 @@ static int nge_miibus_writereg(device_t, int, int, int); static void nge_miibus_statchg(device_t); static void nge_setmulti(struct nge_softc *); -static u_int32_t nge_crc(struct nge_softc *, caddr_t); +static u_int32_t nge_mchash(caddr_t); static void nge_reset(struct nge_softc *); static int nge_list_rx_init(struct nge_softc *); static int nge_list_tx_init(struct nge_softc *); @@ -675,23 +675,20 @@ nge_miibus_statchg(dev) } static u_int32_t -nge_crc(sc, addr) - struct nge_softc *sc; - caddr_t addr; +nge_mchash(addr) + caddr_t addr; { - u_int32_t crc, carry; - int i, j; - u_int8_t c; + u_int32_t crc, carry; + int idx, bit; + u_int8_t data; /* Compute CRC for the address value. */ crc = 0xFFFFFFFF; /* initial value */ - for (i = 0; i < 6; i++) { - c = *(addr + i); - for (j = 0; j < 8; j++) { - carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01); + for (idx = 0; idx < 6; idx++) { + for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) { + carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01); crc <<= 1; - c >>= 1; if (carry) crc = (crc ^ 0x04c11db6) | carry; } @@ -749,7 +746,7 @@ nge_setmulti(sc) TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; - h = nge_crc(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); + h = nge_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)); index = (h >> 4) & 0x7F; bit = h & 0xF; CSR_WRITE_4(sc, NGE_RXFILT_CTL, |
