| if_sn.c (122427) | if_sn.c (122625) |
|---|---|
| 1/* 2 * Copyright (c) 1996 Gardner Buchanan <gbuchanan@shl.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33#include <sys/cdefs.h> | 1/* 2 * Copyright (c) 1996 Gardner Buchanan <gbuchanan@shl.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 17 unchanged lines hidden (view full) --- 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33#include <sys/cdefs.h> |
| 34__FBSDID("$FreeBSD: head/sys/dev/sn/if_sn.c 122427 2003-11-10 16:04:11Z imp $"); | 34__FBSDID("$FreeBSD: head/sys/dev/sn/if_sn.c 122625 2003-11-13 20:55:53Z obrien $"); |
| 35 36/* 37 * This is a driver for SMC's 9000 series of Ethernet adapters. 38 * 39 * This FreeBSD driver is derived from the smc9194 Linux driver by 40 * Erik Stahlman and is Copyright (C) 1996 by Erik Stahlman. 41 * This driver also shamelessly borrows from the FreeBSD ep driver 42 * which is Copyright (C) 1994 Herb Peyerl <hpeyerl@novatel.ca> --- 86 unchanged lines hidden (view full) --- 129static void sninit(void *); 130static void snread(struct ifnet *); 131static void snstart(struct ifnet *); 132static void snstop(struct sn_softc *); 133static void snwatchdog(struct ifnet *); 134 135static void sn_setmcast(struct sn_softc *); 136static int sn_getmcf(struct arpcom *ac, u_char *mcf); | 35 36/* 37 * This is a driver for SMC's 9000 series of Ethernet adapters. 38 * 39 * This FreeBSD driver is derived from the smc9194 Linux driver by 40 * Erik Stahlman and is Copyright (C) 1996 by Erik Stahlman. 41 * This driver also shamelessly borrows from the FreeBSD ep driver 42 * which is Copyright (C) 1994 Herb Peyerl <hpeyerl@novatel.ca> --- 86 unchanged lines hidden (view full) --- 129static void sninit(void *); 130static void snread(struct ifnet *); 131static void snstart(struct ifnet *); 132static void snstop(struct sn_softc *); 133static void snwatchdog(struct ifnet *); 134 135static void sn_setmcast(struct sn_softc *); 136static int sn_getmcf(struct arpcom *ac, u_char *mcf); |
| 137static u_int sn_crc(u_char *); | 137static u_int32_t sn_mchash(caddr_t); |
| 138 139/* I (GB) have been unlucky getting the hardware padding 140 * to work properly. 141 */ 142#define SW_PAD 143 144static const char *chip_ids[15] = { 145 NULL, NULL, NULL, --- 1289 unchanged lines hidden (view full) --- 1435 uint8_t *af = mcf; 1436 struct ifmultiaddr *ifma; 1437 1438 bzero(mcf, MCFSZ); 1439 1440 TAILQ_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) { 1441 if (ifma->ifma_addr->sa_family != AF_LINK) 1442 return 0; | 138 139/* I (GB) have been unlucky getting the hardware padding 140 * to work properly. 141 */ 142#define SW_PAD 143 144static const char *chip_ids[15] = { 145 NULL, NULL, NULL, --- 1289 unchanged lines hidden (view full) --- 1435 uint8_t *af = mcf; 1436 struct ifmultiaddr *ifma; 1437 1438 bzero(mcf, MCFSZ); 1439 1440 TAILQ_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) { 1441 if (ifma->ifma_addr->sa_family != AF_LINK) 1442 return 0; |
| 1443 index = sn_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f; | 1443 index = sn_mchash( 1444 LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f; |
| 1444 index2 = 0; 1445 for (i = 0; i < 6; i++) { 1446 index2 <<= 1; 1447 index2 |= (index & 0x01); 1448 index >>= 1; 1449 } 1450 af[index2 >> 3] |= 1 << (index2 & 7); 1451 } 1452 return 1; /* use multicast filter */ 1453} 1454 | 1445 index2 = 0; 1446 for (i = 0; i < 6; i++) { 1447 index2 <<= 1; 1448 index2 |= (index & 0x01); 1449 index >>= 1; 1450 } 1451 af[index2 >> 3] |= 1 << (index2 & 7); 1452 } 1453 return 1; /* use multicast filter */ 1454} 1455 |
| 1455static u_int 1456sn_crc(u_char *s) | 1456static u_int32_t 1457sn_mchash(caddr_t addr) |
| 1457{ | 1458{ |
| 1458 int perByte; 1459 int perBit; | |
| 1460 const uint32_t poly = 0xedb88320; | 1459 const uint32_t poly = 0xedb88320; |
| 1461 uint32_t v = 0xffffffff; 1462 uint8_t c; 1463 1464 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) { 1465 c = s[perByte]; 1466 for (perBit = 0; perBit < 8; perBit++) { 1467 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0); 1468 c >>= 1; | 1460 u_int32_t crc; 1461 int idx, bit; 1462 u_int8_t data; 1463 1464 /* Compute CRC for the address value. */ 1465 crc = 0xFFFFFFFF; /* initial value */ 1466 1467 for (idx = 0; idx < ETHER_ADDR_LEN; idx++) { 1468 for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) { 1469 crc = (crc >> 1)^(((crc ^ data) & 0x01) ? poly : 0); |
| 1469 } 1470 } | 1470 } 1471 } |
| 1471 return v; | 1472 return crc; |
| 1472} | 1473} |