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if_nge.c (121816) if_nge.c (122625)
1/*
2 * Copyright (c) 2001 Wind River Systems
3 * Copyright (c) 1997, 1998, 1999, 2000, 2001
4 * Bill Paul <wpaul@bsdi.com>. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
1/*
2 * Copyright (c) 2001 Wind River Systems
3 * Copyright (c) 1997, 1998, 1999, 2000, 2001
4 * Bill Paul <wpaul@bsdi.com>. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/sys/dev/nge/if_nge.c 121816 2003-10-31 18:32:15Z brooks $");
35__FBSDID("$FreeBSD: head/sys/dev/nge/if_nge.c 122625 2003-11-13 20:55:53Z obrien $");
36
37/*
38 * National Semiconductor DP83820/DP83821 gigabit ethernet driver
39 * for FreeBSD. Datasheets are available from:
40 *
41 * http://www.national.com/ds/DP/DP83820.pdf
42 * http://www.national.com/ds/DP/DP83821.pdf
43 *

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84 * TX checksum offload enabled and you transmit attempt to transmit a
85 * frame larger than 8170 bytes, the transmitter will wedge.
86 *
87 * To work around the latter problem, TX checksum offload is disabled
88 * if the user selects an MTU larger than 8152 (8170 - 18).
89 */
90
91#include <sys/cdefs.h>
36
37/*
38 * National Semiconductor DP83820/DP83821 gigabit ethernet driver
39 * for FreeBSD. Datasheets are available from:
40 *
41 * http://www.national.com/ds/DP/DP83820.pdf
42 * http://www.national.com/ds/DP/DP83821.pdf
43 *

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84 * TX checksum offload enabled and you transmit attempt to transmit a
85 * frame larger than 8170 bytes, the transmitter will wedge.
86 *
87 * To work around the latter problem, TX checksum offload is disabled
88 * if the user selects an MTU larger than 8152 (8170 - 18).
89 */
90
91#include <sys/cdefs.h>
92__FBSDID("$FreeBSD: head/sys/dev/nge/if_nge.c 121816 2003-10-31 18:32:15Z brooks $");
92__FBSDID("$FreeBSD: head/sys/dev/nge/if_nge.c 122625 2003-11-13 20:55:53Z obrien $");
93
94#include <sys/param.h>
95#include <sys/systm.h>
96#include <sys/sockio.h>
97#include <sys/mbuf.h>
98#include <sys/malloc.h>
99#include <sys/kernel.h>
100#include <sys/socket.h>

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182static int nge_mii_readreg(struct nge_softc *, struct nge_mii_frame *);
183static int nge_mii_writereg(struct nge_softc *, struct nge_mii_frame *);
184
185static int nge_miibus_readreg(device_t, int, int);
186static int nge_miibus_writereg(device_t, int, int, int);
187static void nge_miibus_statchg(device_t);
188
189static void nge_setmulti(struct nge_softc *);
93
94#include <sys/param.h>
95#include <sys/systm.h>
96#include <sys/sockio.h>
97#include <sys/mbuf.h>
98#include <sys/malloc.h>
99#include <sys/kernel.h>
100#include <sys/socket.h>

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182static int nge_mii_readreg(struct nge_softc *, struct nge_mii_frame *);
183static int nge_mii_writereg(struct nge_softc *, struct nge_mii_frame *);
184
185static int nge_miibus_readreg(device_t, int, int);
186static int nge_miibus_writereg(device_t, int, int, int);
187static void nge_miibus_statchg(device_t);
188
189static void nge_setmulti(struct nge_softc *);
190static u_int32_t nge_crc(struct nge_softc *, caddr_t);
190static u_int32_t nge_mchash(caddr_t);
191static void nge_reset(struct nge_softc *);
192static int nge_list_rx_init(struct nge_softc *);
193static int nge_list_tx_init(struct nge_softc *);
194
195#ifdef NGE_USEIOSPACE
196#define NGE_RES SYS_RES_IOPORT
197#define NGE_RID NGE_PCI_LOIO
198#else

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670 } else {
671 NGE_CLRBIT(sc, NGE_CFG, NGE_CFG_MODE_1000);
672 }
673 }
674 return;
675}
676
677static u_int32_t
191static void nge_reset(struct nge_softc *);
192static int nge_list_rx_init(struct nge_softc *);
193static int nge_list_tx_init(struct nge_softc *);
194
195#ifdef NGE_USEIOSPACE
196#define NGE_RES SYS_RES_IOPORT
197#define NGE_RID NGE_PCI_LOIO
198#else

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670 } else {
671 NGE_CLRBIT(sc, NGE_CFG, NGE_CFG_MODE_1000);
672 }
673 }
674 return;
675}
676
677static u_int32_t
678nge_crc(sc, addr)
679 struct nge_softc *sc;
680 caddr_t addr;
678nge_mchash(addr)
679 caddr_t addr;
681{
680{
682 u_int32_t crc, carry;
683 int i, j;
684 u_int8_t c;
681 u_int32_t crc, carry;
682 int idx, bit;
683 u_int8_t data;
685
686 /* Compute CRC for the address value. */
687 crc = 0xFFFFFFFF; /* initial value */
688
684
685 /* Compute CRC for the address value. */
686 crc = 0xFFFFFFFF; /* initial value */
687
689 for (i = 0; i < 6; i++) {
690 c = *(addr + i);
691 for (j = 0; j < 8; j++) {
692 carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01);
688 for (idx = 0; idx < 6; idx++) {
689 for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1) {
690 carry = ((crc & 0x80000000) ? 1 : 0) ^ (data & 0x01);
693 crc <<= 1;
691 crc <<= 1;
694 c >>= 1;
695 if (carry)
696 crc = (crc ^ 0x04c11db6) | carry;
697 }
698 }
699
700 /*
701 * return the filter bit position
702 */

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744 * From the 11 bits returned by the crc routine, the top 7
745 * bits represent the 16-bit word in the mcast hash table
746 * that needs to be updated, and the lower 4 bits represent
747 * which bit within that byte needs to be set.
748 */
749 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
750 if (ifma->ifma_addr->sa_family != AF_LINK)
751 continue;
692 if (carry)
693 crc = (crc ^ 0x04c11db6) | carry;
694 }
695 }
696
697 /*
698 * return the filter bit position
699 */

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741 * From the 11 bits returned by the crc routine, the top 7
742 * bits represent the 16-bit word in the mcast hash table
743 * that needs to be updated, and the lower 4 bits represent
744 * which bit within that byte needs to be set.
745 */
746 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
747 if (ifma->ifma_addr->sa_family != AF_LINK)
748 continue;
752 h = nge_crc(sc, LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
749 h = nge_mchash(LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
753 index = (h >> 4) & 0x7F;
754 bit = h & 0xF;
755 CSR_WRITE_4(sc, NGE_RXFILT_CTL,
756 NGE_FILTADDR_MCAST_LO + (index * 2));
757 NGE_SETBIT(sc, NGE_RXFILT_DATA, (1 << bit));
758 }
759
760 CSR_WRITE_4(sc, NGE_RXFILT_CTL, filtsave);

--- 1528 unchanged lines hidden --- 		750 index = (h >> 4) & 0x7F;
751 bit = h & 0xF;
752 CSR_WRITE_4(sc, NGE_RXFILT_CTL,
753 NGE_FILTADDR_MCAST_LO + (index * 2));
754 NGE_SETBIT(sc, NGE_RXFILT_DATA, (1 << bit));
755 }
756
757 CSR_WRITE_4(sc, NGE_RXFILT_CTL, filtsave);

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