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freebsd-skq/sys/i386/isa/if_lnc.c
mdodd 732c3788e6 Set ifp->if_init to the right function. 
if_init_f_t is passed void * containing the address of ifp->if_softc
not the unit number.

Someone tell me if these things don't work as I don't have the hardware
needed to test them. (thats a first.)

I'll get if_ze and if_zp later.

Pointed out by: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
1999-08-20 14:12:14 +00:00

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/*-
* Copyright (c) 1994-1998
* Paul Richards. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* verbatim and that no modifications are made prior to this
* point in the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Richards.
* 4. The name Paul Richards may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PAUL RICHARDS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: if_lnc.c,v 1.64 1999/08/18 22:14:23 mdodd Exp $
*/
/*
#define DIAGNOSTIC
#define DEBUG
*
* TODO ----
*
* This driver will need bounce buffer support when dma'ing to mbufs above the
* 16Mb mark.
*
* Check all the XXX comments -- some of them are just things I've left
* unfinished rather than "difficult" problems that were hacked around.
*
* Check log settings.
*
* Check how all the arpcom flags get set and used.
*
* Re-inline and re-static all routines after debugging.
*
* Remember to assign iobase in SHMEM probe routines.
*
* Replace all occurences of LANCE-controller-card etc in prints by the name
* strings of the appropriate type -- nifty window dressing
*
* Add DEPCA support -- mostly done.
*
*/
#include "pci.h"
#include "lnc.h"
#if NLNC > 0
#include "bpf.h"
#include "opt_inet.h"
/* Some defines that should really be in generic locations */
#define FCS_LEN 4
#define MULTICAST_FILTER_LEN 8
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/sockio.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#if NBPF > 0
#include <net/bpf.h>
#endif
#include "opt_bdg.h"
#ifdef BRIDGE
#include <net/bridge.h>
#endif
#ifdef PC98
#include <machine/clock.h>
#endif
#include <machine/md_var.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/if_lnc.h>
struct lnc_softc {
struct arpcom arpcom; /* see ../../net/if_arp.h */
struct nic_info nic; /* NIC specific info */
int nrdre;
struct host_ring_entry *recv_ring; /* start of alloc'd mem */
int recv_next;
int ntdre;
struct host_ring_entry *trans_ring;
int trans_next;
struct init_block *init_block; /* Initialisation block */
int pending_transmits; /* No. of transmit descriptors in use */
int next_to_send;
struct mbuf *mbufs;
int mbuf_count;
int flags;
int rap;
int rdp;
int bdp;
#ifdef DEBUG
int lnc_debug;
#endif
LNCSTATS_STRUCT
};
static struct lnc_softc lnc_softc[NLNC];
static char const * const nic_ident[] = {
"Unknown",
"BICC",
"NE2100",
"DEPCA",
"CNET98S", /* PC-98 */
};
static char const * const ic_ident[] = {
"Unknown",
"LANCE",
"C-LANCE",
"PCnet-ISA",
"PCnet-ISA+",
"PCnet-ISA II",
"PCnet-32 VL-Bus",
"PCnet-PCI",
"PCnet-PCI II",
"PCnet-FAST",
"PCnet-FAST+",
"PCnet-Home",
};
static void lnc_setladrf __P((struct lnc_softc *sc));
static void lnc_stop __P((struct lnc_softc *sc));
static void lnc_reset __P((struct lnc_softc *sc));
static void lnc_free_mbufs __P((struct lnc_softc *sc));
static __inline int alloc_mbuf_cluster __P((struct lnc_softc *sc,
struct host_ring_entry *desc));
static __inline struct mbuf *chain_mbufs __P((struct lnc_softc *sc,
int start_of_packet,
int pkt_len));
static __inline struct mbuf *mbuf_packet __P((struct lnc_softc *sc,
int start_of_packet,
int pkt_len));
static __inline void lnc_rint __P((struct lnc_softc *sc));
static __inline void lnc_tint __P((struct lnc_softc *sc));
static int lnc_probe __P((struct isa_device *isa_dev));
#ifdef PC98
static int cnet98s_probe __P((struct lnc_softc *sc, unsigned iobase));
#endif
static int ne2100_probe __P((struct lnc_softc *sc, unsigned iobase));
static int bicc_probe __P((struct lnc_softc *sc, unsigned iobase));
static int dec_macaddr_extract __P((u_char ring[], struct lnc_softc *sc));
static int depca_probe __P((struct lnc_softc *sc, unsigned iobase));
static int lance_probe __P((struct lnc_softc *sc));
static int pcnet_probe __P((struct lnc_softc *sc));
static int lnc_attach_sc __P((struct lnc_softc *sc, int unit));
static int lnc_attach __P((struct isa_device *isa_dev));
static void lnc_init __P((void *));
static ointhand2_t lncintr;
static __inline int mbuf_to_buffer __P((struct mbuf *m, char *buffer));
static __inline struct mbuf *chain_to_cluster __P((struct mbuf *m));
static void lnc_start __P((struct ifnet *ifp));
static int lnc_ioctl __P((struct ifnet *ifp, u_long command, caddr_t data));
static void lnc_watchdog __P((struct ifnet *ifp));
#ifdef DEBUG
void lnc_dump_state __P((struct lnc_softc *sc));
void mbuf_dump_chain __P((struct mbuf *m));
#endif
#if NPCI > 0
void *lnc_attach_ne2100_pci __P((int unit, unsigned iobase));
#endif
void lncintr_sc __P((struct lnc_softc *sc));
struct isa_driver lncdriver = {lnc_probe, lnc_attach, "lnc"};
static __inline void
write_csr(struct lnc_softc *sc, u_short port, u_short val)
{
outw(sc->rap, port);
outw(sc->rdp, val);
}
static __inline u_short
read_csr(struct lnc_softc *sc, u_short port)
{
outw(sc->rap, port);
return (inw(sc->rdp));
}
static __inline void
write_bcr(struct lnc_softc *sc, u_short port, u_short val)
{
outw(sc->rap, port);
outw(sc->bdp, val);
}
static __inline u_short
read_bcr(struct lnc_softc *sc, u_short port)
{
outw(sc->rap, port);
return (inw(sc->bdp));
}
static __inline u_long
ether_crc(const u_char *ether_addr)
{
#define POLYNOMIAL 0xEDB88320UL
u_char i, j, addr;
u_int crc = 0xFFFFFFFFUL;
for (i = 0; i < ETHER_ADDR_LEN; i++) {
addr = *ether_addr++;
for (j = 0; j < MULTICAST_FILTER_LEN; j++) {
crc = (crc >> 1) ^ (((crc ^ addr) & 1) ? POLYNOMIAL : 0);
addr >>= 1;
}
}
return crc;
#undef POLYNOMIAL
}
/*
* Set up the logical address filter for multicast packets
*/
static __inline void
lnc_setladrf(struct lnc_softc *sc)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
struct ifmultiaddr *ifma;
u_long index;
int i;
if (sc->flags & IFF_ALLMULTI) {
for (i=0; i < MULTICAST_FILTER_LEN; i++)
sc->init_block->ladrf[i] = 0xFF;
return;
}
/*
* For each multicast address, calculate a crc for that address and
* then use the high order 6 bits of the crc as a hash code where
* bits 3-5 select the byte of the address filter and bits 0-2 select
* the bit within that byte.
*/
bzero(sc->init_block->ladrf, MULTICAST_FILTER_LEN);
for (ifma = ifp->if_multiaddrs.lh_first; ifma;
ifma = ifma->ifma_link.le_next) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
index = ether_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr))
>> 26;
sc->init_block->ladrf[index >> 3] |= 1 << (index & 7);
}
}
static void
lnc_stop(struct lnc_softc *sc)
{
write_csr(sc, CSR0, STOP);
}
static void
lnc_reset(struct lnc_softc *sc)
{
lnc_init(sc);
}
static void
lnc_free_mbufs(struct lnc_softc *sc)
{
int i;
/*
* We rely on other routines to keep the buff.mbuf field valid. If
* it's not NULL then we assume it points to an allocated mbuf.
*/
for (i = 0; i < NDESC(sc->nrdre); i++)
if ((sc->recv_ring + i)->buff.mbuf)
m_free((sc->recv_ring + i)->buff.mbuf);
for (i = 0; i < NDESC(sc->ntdre); i++)
if ((sc->trans_ring + i)->buff.mbuf)
m_free((sc->trans_ring + i)->buff.mbuf);
if (sc->mbuf_count)
m_freem(sc->mbufs);
}
static __inline int
alloc_mbuf_cluster(struct lnc_softc *sc, struct host_ring_entry *desc)
{
register struct mds *md = desc->md;
struct mbuf *m=0;
int addr;
/* Try and get cluster off local cache */
if (sc->mbuf_count) {
sc->mbuf_count--;
m = sc->mbufs;
sc->mbufs = m->m_next;
/* XXX m->m_data = m->m_ext.ext_buf;*/
} else {
MGET(m, M_DONTWAIT, MT_DATA);
if (!m)
return(1);
MCLGET(m, M_DONTWAIT);
if (!m->m_ext.ext_buf) {
m_free(m);
return(1);
}
}
desc->buff.mbuf = m;
addr = kvtop(m->m_data);
md->md0 = addr;
md->md1= ((addr >> 16) & 0xff) | OWN;
md->md2 = -(short)(MCLBYTES - sizeof(struct pkthdr));
md->md3 = 0;
return(0);
}
static __inline struct mbuf *
chain_mbufs(struct lnc_softc *sc, int start_of_packet, int pkt_len)
{
struct mbuf *head, *m;
struct host_ring_entry *desc;
/*
* Turn head into a pkthdr mbuf --
* assumes a pkthdr type mbuf was
* allocated to the descriptor
* originally.
*/
desc = sc->recv_ring + start_of_packet;
head = desc->buff.mbuf;
head->m_flags |= M_PKTHDR;
m = head;
do {
m = desc->buff.mbuf;
m->m_len = min((MCLBYTES - sizeof(struct pkthdr)), pkt_len);
pkt_len -= m->m_len;
if (alloc_mbuf_cluster(sc, desc))
return((struct mbuf *)NULL);
INC_MD_PTR(start_of_packet, sc->nrdre)
desc = sc->recv_ring + start_of_packet;
m->m_next = desc->buff.mbuf;
} while (start_of_packet != sc->recv_next);
m->m_next = 0;
return(head);
}
static __inline struct mbuf *
mbuf_packet(struct lnc_softc *sc, int start_of_packet, int pkt_len)
{
struct host_ring_entry *start;
struct mbuf *head,*m,*m_prev;
char *data,*mbuf_data;
short blen;
int amount;
/* Get a pkthdr mbuf for the start of packet */
MGETHDR(head, M_DONTWAIT, MT_DATA);
if (!head) {
LNCSTATS(drop_packet)
return(0);
}
m = head;
m->m_len = 0;
start = sc->recv_ring + start_of_packet;
/*blen = -(start->md->md2);*/
blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
data = start->buff.data;
mbuf_data = m->m_data;
while (start_of_packet != sc->recv_next) {
/*
* If the data left fits in a single buffer then set
* blen to the size of the data left.
*/
if (pkt_len < blen)
blen = pkt_len;
/*
* amount is least of data in current ring buffer and
* amount of space left in current mbuf.
*/
amount = min(blen, M_TRAILINGSPACE(m));
if (amount == 0) {
/* mbuf must be empty */
m_prev = m;
MGET(m, M_DONTWAIT, MT_DATA);
if (!m) {
m_freem(head);
return(0);
}
if (pkt_len >= MINCLSIZE)
MCLGET(m, M_DONTWAIT);
m->m_len = 0;
m_prev->m_next = m;
amount = min(blen, M_TRAILINGSPACE(m));
mbuf_data = m->m_data;
}
bcopy(data, mbuf_data, amount);
blen -= amount;
pkt_len -= amount;
m->m_len += amount;
data += amount;
mbuf_data += amount;
if (blen == 0) {
start->md->md1 &= HADR;
start->md->md1 |= OWN;
start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
INC_MD_PTR(start_of_packet, sc->nrdre)
start = sc->recv_ring + start_of_packet;
data = start->buff.data;
/*blen = -(start->md->md2);*/
blen = RECVBUFSIZE; /* XXX More PCnet-32 crap */
}
}
return(head);
}
static __inline void
lnc_rint(struct lnc_softc *sc)
{
struct host_ring_entry *next, *start;
int start_of_packet;
struct mbuf *head;
struct ether_header *eh;
int lookahead;
int flags;
int pkt_len;
/*
* The LANCE will issue a RINT interrupt when the ownership of the
* last buffer of a receive packet has been relinquished by the LANCE.
* Therefore, it can be assumed that a complete packet can be found
* before hitting buffers that are still owned by the LANCE, if not
* then there is a bug in the driver that is causing the descriptors
* to get out of sync.
*/
#ifdef DIAGNOSTIC
if ((sc->recv_ring + sc->recv_next)->md->md1 & OWN) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Receive interrupt with buffer still owned by controller -- Resetting\n", unit);
lnc_reset(sc);
return;
}
if (!((sc->recv_ring + sc->recv_next)->md->md1 & STP)) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Receive interrupt but not start of packet -- Resetting\n", unit);
lnc_reset(sc);
return;
}
#endif
lookahead = 0;
next = sc->recv_ring + sc->recv_next;
while ((flags = next->md->md1) & STP) {
/* Make a note of the start of the packet */
start_of_packet = sc->recv_next;
/*
* Find the end of the packet. Even if not data chaining,
* jabber packets can overrun into a second descriptor.
* If there is no error, then the ENP flag is set in the last
* descriptor of the packet. If there is an error then the ERR
* flag will be set in the descriptor where the error occured.
* Therefore, to find the last buffer of a packet we search for
* either ERR or ENP.
*/
if (!(flags & (ENP | MDERR))) {
do {
INC_MD_PTR(sc->recv_next, sc->nrdre)
next = sc->recv_ring + sc->recv_next;
flags = next->md->md1;
} while (!(flags & (STP | OWN | ENP | MDERR)));
if (flags & STP) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Start of packet found before end of previous in receive ring -- Resetting\n", unit);
lnc_reset(sc);
return;
}
if (flags & OWN) {
if (lookahead) {
/*
* Looked ahead into a packet still
* being received
*/
sc->recv_next = start_of_packet;
break;
} else {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: End of received packet not found-- Resetting\n", unit);
lnc_reset(sc);
return;
}
}
}
pkt_len = (next->md->md3 & MCNT) - FCS_LEN;
/* Move pointer onto start of next packet */
INC_MD_PTR(sc->recv_next, sc->nrdre)
next = sc->recv_ring + sc->recv_next;
if (flags & MDERR) {
int unit = sc->arpcom.ac_if.if_unit;
if (flags & RBUFF) {
LNCSTATS(rbuff)
log(LOG_ERR, "lnc%d: Receive buffer error\n", unit);
}
if (flags & OFLO) {
/* OFLO only valid if ENP is not set */
if (!(flags & ENP)) {
LNCSTATS(oflo)
log(LOG_ERR, "lnc%d: Receive overflow error \n", unit);
}
} else if (flags & ENP) {
if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC)==0) {
/*
* FRAM and CRC are valid only if ENP
* is set and OFLO is not.
*/
if (flags & FRAM) {
LNCSTATS(fram)
log(LOG_ERR, "lnc%d: Framing error\n", unit);
/*
* FRAM is only set if there's a CRC
* error so avoid multiple messages
*/
} else if (flags & CRC) {
LNCSTATS(crc)
log(LOG_ERR, "lnc%d: Receive CRC error\n", unit);
}
}
}
/* Drop packet */
LNCSTATS(rerr)
sc->arpcom.ac_if.if_ierrors++;
while (start_of_packet != sc->recv_next) {
start = sc->recv_ring + start_of_packet;
start->md->md2 = -RECVBUFSIZE; /* XXX - shouldn't be necessary */
start->md->md1 &= HADR;
start->md->md1 |= OWN;
INC_MD_PTR(start_of_packet, sc->nrdre)
}
} else { /* Valid packet */
sc->arpcom.ac_if.if_ipackets++;
if (sc->nic.mem_mode == DMA_MBUF)
head = chain_mbufs(sc, start_of_packet, pkt_len);
else
head = mbuf_packet(sc, start_of_packet, pkt_len);
if (head) {
/*
* First mbuf in packet holds the
* ethernet and packet headers
*/
head->m_pkthdr.rcvif = &sc->arpcom.ac_if;
head->m_pkthdr.len = pkt_len ;
/*
* BPF expects the ether header to be in the first
* mbuf of the chain so point eh at the right place
* but don't increment the mbuf pointers before
* the bpf tap.
*/
eh = (struct ether_header *) head->m_data;
#if NBPF > 0
if (sc->arpcom.ac_if.if_bpf)
bpf_mtap(&sc->arpcom.ac_if, head);
#endif
#ifdef BRIDGE
if (do_bridge) {
struct ifnet *bdg_ifp ;
bdg_ifp = bridge_in(head);
if (bdg_ifp == BDG_DROP)
m_freem(head);
else {
if (bdg_ifp != BDG_LOCAL)
bdg_forward(&head, bdg_ifp);
if ( bdg_ifp == BDG_LOCAL ||
bdg_ifp == BDG_BCAST ||
bdg_ifp == BDG_MCAST )
goto getit;
else if (head)
m_freem(head);
}
} else
#endif
/* Check this packet is really for us */
if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
!(eh->ether_dhost[0] & 1) && /* Broadcast and multicast */
(bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
sizeof(eh->ether_dhost))))
m_freem(head);
else
{
#ifdef BRIDGE
getit:
#endif
/* Skip over the ether header */
head->m_data += sizeof *eh;
head->m_len -= sizeof *eh;
head->m_pkthdr.len -= sizeof *eh;
ether_input(&sc->arpcom.ac_if, eh, head);
}
} else {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR,"lnc%d: Packet dropped, no mbufs\n",unit);
LNCSTATS(drop_packet)
}
}
lookahead++;
}
/*
* At this point all completely received packets have been processed
* so clear RINT since any packets that have arrived while we were in
* here have been dealt with.
*/
outw(sc->rdp, RINT | INEA);
}
static __inline void
lnc_tint(struct lnc_softc *sc)
{
struct host_ring_entry *next, *start;
int start_of_packet;
int lookahead;
/*
* If the driver is reset in this routine then we return immediately to
* the interrupt driver routine. Any interrupts that have occured
* since the reset will be dealt with there. sc->trans_next
* should point to the start of the first packet that was awaiting
* transmission after the last transmit interrupt was dealt with. The
* LANCE should have relinquished ownership of that descriptor before
* the interrupt. Therefore, sc->trans_next should point to a
* descriptor with STP set and OWN cleared. If not then the driver's
* pointers are out of sync with the LANCE, which signifies a bug in
* the driver. Therefore, the following two checks are really
* diagnostic, since if the driver is working correctly they should
* never happen.
*/
#ifdef DIAGNOSTIC
if ((sc->trans_ring + sc->trans_next)->md->md1 & OWN) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Transmit interrupt with buffer still owned by controller -- Resetting\n", unit);
lnc_reset(sc);
return;
}
#endif
/*
* The LANCE will write the status information for the packet it just
* tried to transmit in one of two places. If the packet was
* transmitted successfully then the status will be written into the
* last descriptor of the packet. If the transmit failed then the
* status will be written into the descriptor that was being accessed
* when the error occured and all subsequent descriptors in that
* packet will have been relinquished by the LANCE.
*
* At this point we know that sc->trans_next points to the start
* of a packet that the LANCE has just finished trying to transmit.
* We now search for a buffer with either ENP or ERR set.
*/
lookahead = 0;
do {
start_of_packet = sc->trans_next;
next = sc->trans_ring + sc->trans_next;
#ifdef DIAGNOSTIC
if (!(next->md->md1 & STP)) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Transmit interrupt but not start of packet -- Resetting\n", unit);
lnc_reset(sc);
return;
}
#endif
/*
* Find end of packet.
*/
if (!(next->md->md1 & (ENP | MDERR))) {
do {
INC_MD_PTR(sc->trans_next, sc->ntdre)
next = sc->trans_ring + sc->trans_next;
} while (!(next->md->md1 & (STP | OWN | ENP | MDERR)));
if (next->md->md1 & STP) {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: Start of packet found before end of previous in transmit ring -- Resetting\n", unit);
lnc_reset(sc);
return;
}
if (next->md->md1 & OWN) {
if (lookahead) {
/*
* Looked ahead into a packet still
* being transmitted
*/
sc->trans_next = start_of_packet;
break;
} else {
int unit = sc->arpcom.ac_if.if_unit;
log(LOG_ERR, "lnc%d: End of transmitted packet not found -- Resetting\n", unit);
lnc_reset(sc);
return;
}
}
}
/*
* Check for ERR first since other flags are irrelevant if an
* error occurred.
*/
if (next->md->md1 & MDERR) {
int unit = sc->arpcom.ac_if.if_unit;
LNCSTATS(terr)
sc->arpcom.ac_if.if_oerrors++;
if (next->md->md3 & LCOL) {
LNCSTATS(lcol)
log(LOG_ERR, "lnc%d: Transmit late collision -- Net error?\n", unit);
sc->arpcom.ac_if.if_collisions++;
/*
* Clear TBUFF since it's not valid when LCOL
* set
*/
next->md->md3 &= ~TBUFF;
}
if (next->md->md3 & LCAR) {
LNCSTATS(lcar)
log(LOG_ERR, "lnc%d: Loss of carrier during transmit -- Net error?\n", unit);
}
if (next->md->md3 & RTRY) {
LNCSTATS(rtry)
log(LOG_ERR, "lnc%d: Transmit of packet failed after 16 attempts -- TDR = %d\n", unit, ((sc->trans_ring + sc->trans_next)->md->md3 & TDR));
sc->arpcom.ac_if.if_collisions += 16;
/*
* Clear TBUFF since it's not valid when RTRY
* set
*/
next->md->md3 &= ~TBUFF;
}
/*
* TBUFF is only valid if neither LCOL nor RTRY are set.
* We need to check UFLO after LCOL and RTRY so that we
* know whether or not TBUFF is valid. If either are
* set then TBUFF will have been cleared above. A
* UFLO error will turn off the transmitter so we
* have to reset.
*
*/
if (next->md->md3 & UFLO) {
LNCSTATS(uflo)
/*
* If an UFLO has occured it's possibly due
* to a TBUFF error
*/
if (next->md->md3 & TBUFF) {
LNCSTATS(tbuff)
log(LOG_ERR, "lnc%d: Transmit buffer error -- Resetting\n", unit);
} else
log(LOG_ERR, "lnc%d: Transmit underflow error -- Resetting\n", unit);
lnc_reset(sc);
return;
}
do {
INC_MD_PTR(sc->trans_next, sc->ntdre)
next = sc->trans_ring + sc->trans_next;
} while (!(next->md->md1 & STP) && (sc->trans_next != sc->next_to_send));
} else {
/*
* Since we check for ERR first then if we get here
* the packet was transmitted correctly. There may
* still have been non-fatal errors though.
* Don't bother checking for DEF, waste of time.
*/
sc->arpcom.ac_if.if_opackets++;
if (next->md->md1 & MORE) {
LNCSTATS(more)
sc->arpcom.ac_if.if_collisions += 2;
}
/*
* ONE is invalid if LCOL is set. If LCOL was set then
* ERR would have also been set and we would have
* returned from lnc_tint above. Therefore we can
* assume if we arrive here that ONE is valid.
*
*/
if (next->md->md1 & ONE) {
LNCSTATS(one)
sc->arpcom.ac_if.if_collisions++;
}
INC_MD_PTR(sc->trans_next, sc->ntdre)
next = sc->trans_ring + sc->trans_next;
}
/*
* Clear descriptors and free any mbufs.
*/
do {
start = sc->trans_ring + start_of_packet;
start->md->md1 &= HADR;
if (sc->nic.mem_mode == DMA_MBUF) {
/* Cache clusters on a local queue */
if ((start->buff.mbuf->m_flags & M_EXT) && (sc->mbuf_count < MBUF_CACHE_LIMIT)) {
if (sc->mbuf_count) {
start->buff.mbuf->m_next = sc->mbufs;
sc->mbufs = start->buff.mbuf;
} else
sc->mbufs = start->buff.mbuf;
sc->mbuf_count++;
start->buff.mbuf = 0;
} else {
struct mbuf *junk;
MFREE(start->buff.mbuf, junk);
start->buff.mbuf = 0;
}
}
sc->pending_transmits--;
INC_MD_PTR(start_of_packet, sc->ntdre)
}while (start_of_packet != sc->trans_next);
/*
* There's now at least one free descriptor
* in the ring so indicate that we can accept
* more packets again.
*/
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
lookahead++;
} while (sc->pending_transmits && !(next->md->md1 & OWN));
/*
* Clear TINT since we've dealt with all
* the completed transmissions.
*/
outw(sc->rdp, TINT | INEA);
/* XXX only while doing if_is comparisons */
if (!(sc->arpcom.ac_if.if_flags & IFF_OACTIVE))
lnc_start(&sc->arpcom.ac_if);
}
static int
lnc_probe(struct isa_device * isa_dev)
{
int nports;
int unit = isa_dev->id_unit;
struct lnc_softc *sc = &lnc_softc[unit];
unsigned iobase = isa_dev->id_iobase;
#ifdef DIAGNOSTIC
int vsw;
vsw = inw(isa_dev->id_iobase + PCNET_VSW);
printf("Vendor Specific Word = %x\n", vsw);
#endif
nports = bicc_probe(sc, iobase);
if (nports == 0)
nports = ne2100_probe(sc, iobase);
if (nports == 0)
nports = depca_probe(sc, iobase);
#ifdef PC98
if (nports == 0)
nports = cnet98s_probe(sc, iobase);
#endif
return (nports);
}
#ifdef PC98
/* ISA Bus Configuration Registers */
/* XXX - Should be in ic/Am7990.h */
#define MSRDA 0x0000 /* ISACSR0: Master Mode Read Activity */
#define MSWRA 0x0001 /* ISACSR1: Master Mode Write Activity */
#define MC 0x0002 /* ISACSR2: Miscellaneous Configuration */
#define LED1 0x0005 /* ISACSR5: LED1 Status */
#define LED2 0x0006 /* ISACSR6: LED2 Status */
#define LED3 0x0007 /* ISACSR7: LED3 Status */
#define LED_PSE 0x0080 /* Pulse Stretcher */
#define LED_XMTE 0x0010 /* Transmit Status */
#define LED_RVPOLE 0x0008 /* Receive Polarity */
#define LED_RCVE 0x0004 /* Receive Status */
#define LED_JABE 0x0002 /* Jabber */
#define LED_COLE 0x0001 /* Collision */
static int
cnet98s_probe(struct lnc_softc *sc, unsigned iobase)
{
int i;
ushort tmp;
sc->rap = iobase + CNET98S_RAP;
sc->rdp = iobase + CNET98S_RDP;
/* Reset */
tmp = inw(iobase + CNET98S_RESET);
outw(iobase + CNET98S_RESET, tmp);
DELAY(500);
sc->nic.ic = pcnet_probe(sc);
if ((sc->nic.ic == UNKNOWN) || (sc->nic.ic > PCnet_32)) {
return (0);
}
sc->nic.ident = CNET98S;
sc->nic.mem_mode = DMA_FIXED;
/* XXX - For now just use the defines */
sc->nrdre = NRDRE;
sc->ntdre = NTDRE;
/* Extract MAC address from PROM */
for (i = 0; i < ETHER_ADDR_LEN; i++) {
sc->arpcom.ac_enaddr[i] = inb(iobase + (i * 2));
}
/*
* ISA Configuration
*
* XXX - Following parameters are Contec C-NET(98)S only.
* So, check the Ethernet address here.
*
* Contec uses 00 80 4c ?? ?? ??
*/
if (sc->arpcom.ac_enaddr[0] == (u_char)0x00
&& sc->arpcom.ac_enaddr[1] == (u_char)0x80
&& sc->arpcom.ac_enaddr[2] == (u_char)0x4c) {
outw(sc->rap, MSRDA);
outw(iobase + CNET98S_IDP, 0x0006);
outw(sc->rap, MSWRA);
outw(iobase + CNET98S_IDP, 0x0006);
#ifdef DIAGNOSTIC
outw(sc->rap, MC);
printf("ISACSR2 = %x\n", inw(iobase + CNET98S_IDP));
#endif
outw(sc->rap, LED1);
outw(iobase + CNET98S_IDP, LED_PSE | LED_XMTE);
outw(sc->rap, LED2);
outw(iobase + CNET98S_IDP, LED_PSE | LED_RCVE);
outw(sc->rap, LED3);
outw(iobase + CNET98S_IDP, LED_PSE | LED_COLE);
}
return (CNET98S_IOSIZE);
}
#endif
static int
ne2100_probe(struct lnc_softc *sc, unsigned iobase)
{
int i;
sc->rap = iobase + PCNET_RAP;
sc->rdp = iobase + PCNET_RDP;
sc->nic.ic = pcnet_probe(sc);
if ((sc->nic.ic > 0) && (sc->nic.ic < PCnet_PCI)) {
sc->nic.ident = NE2100;
sc->nic.mem_mode = DMA_FIXED;
/* XXX - For now just use the defines */
sc->nrdre = NRDRE;
sc->ntdre = NTDRE;
/* Extract MAC address from PROM */
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = inb(iobase + i);
return (NE2100_IOSIZE);
} else {
return (0);
}
}
static int
bicc_probe(struct lnc_softc *sc, unsigned iobase)
{
int i;
/*
* There isn't any way to determine if a NIC is a BICC. Basically, if
* the lance probe succeeds using the i/o addresses of the BICC then
* we assume it's a BICC.
*
*/
sc->rap = iobase + BICC_RAP;
sc->rdp = iobase + BICC_RDP;
/* I think all these cards us the Am7990 */
if ((sc->nic.ic = lance_probe(sc))) {
sc->nic.ident = BICC;
sc->nic.mem_mode = DMA_FIXED;
/* XXX - For now just use the defines */
sc->nrdre = NRDRE;
sc->ntdre = NTDRE;
/* Extract MAC address from PROM */
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = inb(iobase + (i * 2));
return (BICC_IOSIZE);
} else {
return (0);
}
}
/*
* I don't have data sheets for the dec cards but it looks like the mac
* address is contained in a 32 byte ring. Each time you read from the port
* you get the next byte in the ring. The mac address is stored after a
* signature so keep searching for the signature first.
*/
static int
dec_macaddr_extract(u_char ring[], struct lnc_softc * sc)
{
const unsigned char signature[] = {0xff, 0x00, 0x55, 0xaa, 0xff, 0x00, 0x55, 0xaa};
int i, j, rindex;
for (i = 0; i < sizeof ring; i++) {
for (j = 0, rindex = i; j < sizeof signature; j++) {
if (ring[rindex] != signature[j])
break;
if (++rindex > sizeof ring)
rindex = 0;
}
if (j == sizeof signature) {
for (j = 0, rindex = i; j < ETHER_ADDR_LEN; j++) {
sc->arpcom.ac_enaddr[j] = ring[rindex];
if (++rindex > sizeof ring)
rindex = 0;
}
return (1);
}
}
return (0);
}
static int
depca_probe(struct lnc_softc *sc, unsigned iobase)
{
int i;
unsigned char maddr_ring[DEPCA_ADDR_ROM_SIZE];
sc->rap = iobase + DEPCA_RAP;
sc->rdp = iobase + DEPCA_RDP;
if ((sc->nic.ic = lance_probe(sc))) {
sc->nic.ident = DEPCA;
sc->nic.mem_mode = SHMEM;
/* Extract MAC address from PROM */
for (i = 0; i < DEPCA_ADDR_ROM_SIZE; i++)
maddr_ring[i] = inb(iobase + DEPCA_ADP);
if (dec_macaddr_extract(maddr_ring, sc)) {
return (DEPCA_IOSIZE);
}
}
return (0);
}
static int
lance_probe(struct lnc_softc *sc)
{
write_csr(sc, CSR0, STOP);
if ((inw(sc->rdp) & STOP) && !(read_csr(sc, CSR3))) {
/*
* Check to see if it's a C-LANCE. For the LANCE the INEA bit
* cannot be set while the STOP bit is. This restriction is
* removed for the C-LANCE.
*/
write_csr(sc, CSR0, INEA);
if (read_csr(sc, CSR0) & INEA)
return (C_LANCE);
else
return (LANCE);
} else
return (UNKNOWN);
}
static int
pcnet_probe(struct lnc_softc *sc)
{
u_long chip_id;
int type;
/*
* The PCnet family don't reset the RAP register on reset so we'll
* have to write during the probe :-) It does have an ID register
* though so the probe is just a matter of reading it.
*/
if ((type = lance_probe(sc))) {
chip_id = read_csr(sc, CSR89);
chip_id <<= 16;
chip_id |= read_csr(sc, CSR88);
if (chip_id & AMD_MASK) {
chip_id >>= 12;
switch (chip_id & PART_MASK) {
case Am79C960:
return (PCnet_ISA);
case Am79C961:
return (PCnet_ISAplus);
case Am79C961A:
return (PCnet_ISA_II);
case Am79C965:
return (PCnet_32);
case Am79C970:
return (PCnet_PCI);
case Am79C970A:
return (PCnet_PCI_II);
case Am79C971:
return (PCnet_FAST);
case Am79C972:
return (PCnet_FASTplus);
case Am79C978:
return (PCnet_Home);
default:
break;
}
}
}
return (type);
}
static int
lnc_attach_sc(struct lnc_softc *sc, int unit)
{
int lnc_mem_size;
/*
* Allocate memory for use by the controller.
*
* XXX -- the Am7990 and Am79C960 only have 24 address lines and so can
* only access the lower 16Mb of physical memory. For the moment we
* assume that malloc will allocate memory within the lower 16Mb
* range. This is not a very valid assumption but there's nothing
* that can be done about it yet. For shared memory NICs this isn't
* relevant.
*
*/
lnc_mem_size = ((NDESC(sc->nrdre) + NDESC(sc->ntdre)) *
sizeof(struct host_ring_entry));
if (sc->nic.mem_mode != SHMEM)
lnc_mem_size += sizeof(struct init_block) + (sizeof(struct mds) *
(NDESC(sc->nrdre) + NDESC(sc->ntdre))) +
MEM_SLEW;
/* If using DMA to fixed host buffers then allocate memory for them */
if (sc->nic.mem_mode == DMA_FIXED)
lnc_mem_size += (NDESC(sc->nrdre) * RECVBUFSIZE) + (NDESC(sc->ntdre) * TRANSBUFSIZE);
if (sc->nic.mem_mode != SHMEM) {
if (sc->nic.ic < PCnet_32) {
/* ISA based cards */
sc->recv_ring = contigmalloc(lnc_mem_size, M_DEVBUF, M_NOWAIT,
0ul, 0xfffffful, 4ul, 0x1000000);
} else {
/* Non-ISA based cards, 32 bit capable */
#ifdef notyet
/*
* For the 32 bit driver we're not fussed where we DMA to
* though it'll still need to be contiguous
*/
sc->recv_ring = malloc(lnc_mem_size, M_DEVBUF, M_NOWAIT);
#else
/*
* For now it still needs to be below 16MB because the
* descriptor's can only hold 16 bit addresses.
*/
sc->recv_ring = contigmalloc(lnc_mem_size, M_DEVBUF, M_NOWAIT,
0ul, 0xfffffful, 4ul, 0x1000000);
#endif
}
}
if (!sc->recv_ring) {
log(LOG_ERR, "lnc%d: Couldn't allocate memory for NIC\n", unit);
return (0); /* XXX -- attach failed -- not tested in
* calling routines */
}
/* Set default mode */
sc->nic.mode = NORMAL;
/* Fill in arpcom structure entries */
sc->arpcom.ac_if.if_softc = sc;
sc->arpcom.ac_if.if_name = lncdriver.name;
sc->arpcom.ac_if.if_unit = unit;
sc->arpcom.ac_if.if_mtu = ETHERMTU;
sc->arpcom.ac_if.if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
sc->arpcom.ac_if.if_timer = 0;
sc->arpcom.ac_if.if_output = ether_output;
sc->arpcom.ac_if.if_start = lnc_start;
sc->arpcom.ac_if.if_ioctl = lnc_ioctl;
sc->arpcom.ac_if.if_watchdog = lnc_watchdog;
sc->arpcom.ac_if.if_init = lnc_init;
sc->arpcom.ac_if.if_type = IFT_ETHER;
sc->arpcom.ac_if.if_addrlen = ETHER_ADDR_LEN;
sc->arpcom.ac_if.if_hdrlen = ETHER_HDR_LEN;
sc->arpcom.ac_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
/*
* XXX -- should check return status of if_attach
*/
if_attach(&sc->arpcom.ac_if);
ether_ifattach(&sc->arpcom.ac_if);
printf("lnc%d: ", unit);
if (sc->nic.ic == LANCE || sc->nic.ic == C_LANCE)
printf("%s (%s)",
nic_ident[sc->nic.ident], ic_ident[sc->nic.ic]);
else
printf("%s", ic_ident[sc->nic.ic]);
printf(" address %6D\n", sc->arpcom.ac_enaddr, ":");
#if NBPF > 0
bpfattach(&sc->arpcom.ac_if, DLT_EN10MB, sizeof(struct ether_header));
#endif
return (1);
}
static int
lnc_attach(struct isa_device * isa_dev)
{
int unit = isa_dev->id_unit;
struct lnc_softc *sc = &lnc_softc[unit];
int result;
isa_dev->id_ointr = lncintr;
result = lnc_attach_sc (sc, unit);
if (result == 0)
return (0);
#ifndef PC98
/*
* XXX - is it safe to call isa_dmacascade() after if_attach()
* and ether_ifattach() have been called in lnc_attach() ???
*/
if ((sc->nic.mem_mode != SHMEM) &&
(sc->nic.ic < PCnet_32))
isa_dmacascade(isa_dev->id_drq);
#endif
return result;
}
#if NPCI > 0
void *
lnc_attach_ne2100_pci(int unit, unsigned iobase)
{
int i;
struct lnc_softc *sc = malloc(sizeof *sc, M_DEVBUF, M_NOWAIT);
if (sc) {
bzero (sc, sizeof *sc);
sc->rap = iobase + PCNET_RAP;
sc->rdp = iobase + PCNET_RDP;
sc->bdp = iobase + PCNET_BDP;
sc->nic.ic = pcnet_probe(sc);
if (sc->nic.ic >= PCnet_32) {
sc->nic.ident = NE2100;
sc->nic.mem_mode = DMA_FIXED;
/* XXX - For now just use the defines */
sc->nrdre = NRDRE;
sc->ntdre = NTDRE;
/* Extract MAC address from PROM */
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->arpcom.ac_enaddr[i] = inb(iobase + i);
if (lnc_attach_sc(sc, unit) == 0) {
free(sc, M_DEVBUF);
sc = NULL;
}
}
else {
free(sc, M_DEVBUF);
sc = NULL;
}
}
return sc;
}
#endif
static void
lnc_init(xsc)
void *xsc;
{
struct lnc_softc *sc = xsc;
int s, i;
char *lnc_mem;
/* Check that interface has valid address */
if (TAILQ_EMPTY(&sc->arpcom.ac_if.if_addrhead)) /* XXX unlikely */
return;
/* Shut down interface */
s = splimp();
lnc_stop(sc);
sc->arpcom.ac_if.if_flags |= IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; /* XXX??? */
/*
* This sets up the memory area for the controller. Memory is set up for
* the initialisation block (12 words of contiguous memory starting
* on a word boundary),the transmit and receive ring structures (each
* entry is 4 words long and must start on a quadword boundary) and
* the data buffers.
*
* The alignment tests are particularly paranoid.
*/
sc->recv_next = 0;
sc->trans_ring = sc->recv_ring + NDESC(sc->nrdre);
sc->trans_next = 0;
if (sc->nic.mem_mode == SHMEM)
lnc_mem = (char *) sc->nic.iobase;
else
lnc_mem = (char *) (sc->trans_ring + NDESC(sc->ntdre));
lnc_mem = (char *)(((int)lnc_mem + 1) & ~1);
sc->init_block = (struct init_block *) ((int) lnc_mem & ~1);
lnc_mem = (char *) (sc->init_block + 1);
lnc_mem = (char *)(((int)lnc_mem + 7) & ~7);
/* Initialise pointers to descriptor entries */
for (i = 0; i < NDESC(sc->nrdre); i++) {
(sc->recv_ring + i)->md = (struct mds *) lnc_mem;
lnc_mem += sizeof(struct mds);
}
for (i = 0; i < NDESC(sc->ntdre); i++) {
(sc->trans_ring + i)->md = (struct mds *) lnc_mem;
lnc_mem += sizeof(struct mds);
}
/* Initialise the remaining ring entries */
if (sc->nic.mem_mode == DMA_MBUF) {
sc->mbufs = 0;
sc->mbuf_count = 0;
/* Free previously allocated mbufs */
if (sc->flags & LNC_INITIALISED)
lnc_free_mbufs(sc);
for (i = 0; i < NDESC(sc->nrdre); i++) {
if (alloc_mbuf_cluster(sc, sc->recv_ring+i)) {
log(LOG_ERR, "Initialisation failed -- no mbufs\n");
splx(s);
return;
}
}
for (i = 0; i < NDESC(sc->ntdre); i++) {
(sc->trans_ring + i)->buff.mbuf = 0;
(sc->trans_ring + i)->md->md0 = 0;
(sc->trans_ring + i)->md->md1 = 0;
(sc->trans_ring + i)->md->md2 = 0;
(sc->trans_ring + i)->md->md3 = 0;
}
} else {
for (i = 0; i < NDESC(sc->nrdre); i++) {
(sc->recv_ring + i)->md->md0 = kvtop(lnc_mem);
(sc->recv_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff) | OWN;
(sc->recv_ring + i)->md->md2 = -RECVBUFSIZE;
(sc->recv_ring + i)->md->md3 = 0;
(sc->recv_ring + i)->buff.data = lnc_mem;
lnc_mem += RECVBUFSIZE;
}
for (i = 0; i < NDESC(sc->ntdre); i++) {
(sc->trans_ring + i)->md->md0 = kvtop(lnc_mem);
(sc->trans_ring + i)->md->md1 = ((kvtop(lnc_mem) >> 16) & 0xff);
(sc->trans_ring + i)->md->md2 = 0;
(sc->trans_ring + i)->md->md3 = 0;
(sc->trans_ring + i)->buff.data = lnc_mem;
lnc_mem += TRANSBUFSIZE;
}
}
sc->next_to_send = 0;
/* Set up initialisation block */
sc->init_block->mode = sc->nic.mode;
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->init_block->padr[i] = sc->arpcom.ac_enaddr[i];
lnc_setladrf(sc);
sc->init_block->rdra = kvtop(sc->recv_ring->md);
sc->init_block->rlen = ((kvtop(sc->recv_ring->md) >> 16) & 0xff) | (sc->nrdre << 13);
sc->init_block->tdra = kvtop(sc->trans_ring->md);
sc->init_block->tlen = ((kvtop(sc->trans_ring->md) >> 16) & 0xff) | (sc->ntdre << 13);
/* Set flags to show that the memory area is valid */
sc->flags |= LNC_INITIALISED;
sc->pending_transmits = 0;
/* Give the LANCE the physical address of the initialisation block */
if (sc->nic.ic == PCnet_Home) {
u_short media;
/* Set PHY_SEL to HomeRun */
media = read_bcr(sc, BCR49);
media &= ~3;
media |= 1;
write_bcr(sc, BCR49, media);
}
write_csr(sc, CSR1, kvtop(sc->init_block));
write_csr(sc, CSR2, (kvtop(sc->init_block) >> 16) & 0xff);
/*
* Depending on which controller this is, CSR3 has different meanings.
* For the Am7990 it controls DMA operations, for the Am79C960 it
* controls interrupt masks and transmitter algorithms. In either
* case, none of the flags are set.
*
*/
write_csr(sc, CSR3, 0);
/* Let's see if it starts */
write_csr(sc, CSR0, INIT);
for (i = 0; i < 1000; i++)
if (read_csr(sc, CSR0) & IDON)
break;
/*
* Now that the initialisation is complete there's no reason to
* access anything except CSR0, so we leave RAP pointing there
* so we can just access RDP from now on, saving an outw each
* time.
*/
if (read_csr(sc, CSR0) & IDON) {
/*
* Enable interrupts, start the LANCE, mark the interface as
* running and transmit any pending packets.
*/
write_csr(sc, CSR0, STRT | INEA);
sc->arpcom.ac_if.if_flags |= IFF_RUNNING;
sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
lnc_start(&sc->arpcom.ac_if);
} else
log(LOG_ERR, "lnc%d: Initialisation failed\n",
sc->arpcom.ac_if.if_unit);
splx(s);
}
/*
* The interrupt flag (INTR) will be set and provided that the interrupt enable
* flag (INEA) is also set, the interrupt pin will be driven low when any of
* the following occur:
*
* 1) Completion of the initialisation routine (IDON). 2) The reception of a
* packet (RINT). 3) The transmission of a packet (TINT). 4) A transmitter
* timeout error (BABL). 5) A missed packet (MISS). 6) A memory error (MERR).
*
* The interrupt flag is cleared when all of the above conditions are cleared.
*
* If the driver is reset from this routine then it first checks to see if any
* interrupts have ocurred since the reset and handles them before returning.
* This is because the NIC may signify a pending interrupt in CSR0 using the
* INTR flag even if a hardware interrupt is currently inhibited (at least I
* think it does from reading the data sheets). We may as well deal with
* these pending interrupts now rather than get the overhead of another
* hardware interrupt immediately upon returning from the interrupt handler.
*
*/
void
lncintr_sc(struct lnc_softc *sc)
{
int unit = sc->arpcom.ac_if.if_unit;
u_short csr0;
/*
* INEA is the only bit that can be cleared by writing a 0 to it so
* we have to include it in any writes that clear other flags.
*/
while ((csr0 = inw(sc->rdp)) & INTR) {
/*
* Clear interrupt flags early to avoid race conditions. The
* controller can still set these flags even while we're in
* this interrupt routine. If the flag is still set from the
* event that caused this interrupt any new events will
* be missed.
*/
/* outw(sc->rdp, IDON | CERR | BABL | MISS | MERR | RINT | TINT | INEA); */
outw(sc->rdp, csr0);
/* We don't do anything with the IDON flag */
if (csr0 & ERR) {
if (csr0 & CERR) {
log(LOG_ERR, "lnc%d: Heartbeat error -- SQE test failed\n", unit);
LNCSTATS(cerr)
}
if (csr0 & BABL) {
log(LOG_ERR, "lnc%d: Babble error - more than 1519 bytes transmitted\n", unit);
LNCSTATS(babl)
sc->arpcom.ac_if.if_oerrors++;
}
if (csr0 & MISS) {
log(LOG_ERR, "lnc%d: Missed packet -- no receive buffer\n", unit);
LNCSTATS(miss)
sc->arpcom.ac_if.if_ierrors++;
}
if (csr0 & MERR) {
log(LOG_ERR, "lnc%d: Memory error -- Resetting\n", unit);
LNCSTATS(merr)
lnc_reset(sc);
continue;
}
}
if (csr0 & RINT) {
LNCSTATS(rint)
lnc_rint(sc);
}
if (csr0 & TINT) {
LNCSTATS(tint)
sc->arpcom.ac_if.if_timer = 0;
lnc_tint(sc);
}
/*
* If there's room in the transmit descriptor ring then queue
* some more transmit packets.
*/
if (!(sc->arpcom.ac_if.if_flags & IFF_OACTIVE))
lnc_start(&sc->arpcom.ac_if);
}
}
static void
lncintr(int unit)
{
struct lnc_softc *sc = &lnc_softc[unit];
lncintr_sc (sc);
}
static __inline int
mbuf_to_buffer(struct mbuf *m, char *buffer)
{
int len=0;
for( ; m; m = m->m_next) {
bcopy(mtod(m, caddr_t), buffer, m->m_len);
buffer += m->m_len;
len += m->m_len;
}
return(len);
}
static __inline struct mbuf *
chain_to_cluster(struct mbuf *m)
{
struct mbuf *new;
MGET(new, M_DONTWAIT, MT_DATA);
if (new) {
MCLGET(new, M_DONTWAIT);
if (new->m_ext.ext_buf) {
new->m_len = mbuf_to_buffer(m, new->m_data);
m_freem(m);
return(new);
} else
m_free(new);
}
return(0);
}
/*
* IFF_OACTIVE and IFF_RUNNING are checked in ether_output so it's redundant
* to check them again since we wouldn't have got here if they were not
* appropriately set. This is also called from lnc_init and lncintr but the
* flags should be ok at those points too.
*/
static void
lnc_start(struct ifnet *ifp)
{
struct lnc_softc *sc = ifp->if_softc;
struct host_ring_entry *desc;
int tmp;
int end_of_packet;
struct mbuf *head, *m;
int len, chunk;
int addr;
int no_entries_needed;
do {
IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, head);
if (!head)
return;
if (sc->nic.mem_mode == DMA_MBUF) {
no_entries_needed = 0;
for (m=head; m; m = m->m_next)
no_entries_needed++;
/*
* We try and avoid bcopy as much as possible
* but there are two cases when we use it.
*
* 1) If there are not enough free entries in the ring
* to hold each mbuf in the chain then compact the
* chain into a single cluster.
*
* 2) The Am7990 and Am79C90 must not have less than
* 100 bytes in the first descriptor of a chained
* packet so it's necessary to shuffle the mbuf
* contents to ensure this.
*/
if (no_entries_needed > (NDESC(sc->ntdre) - sc->pending_transmits)) {
if (!(head = chain_to_cluster(head))) {
log(LOG_ERR, "lnc%d: Couldn't get mbuf for transmit packet -- Resetting \n ",ifp->if_unit);
lnc_reset(sc);
return;
}
} else if ((sc->nic.ic == LANCE) || (sc->nic.ic == C_LANCE)) {
if ((head->m_len < 100) && (head->m_next)) {
len = 100 - head->m_len;
if (M_TRAILINGSPACE(head) < len) {
/*
* Move data to start of data
* area. We assume the first
* mbuf has a packet header
* and is not a cluster.
*/
bcopy((caddr_t)head->m_data, (caddr_t)head->m_pktdat, head->m_len);
head->m_data = head->m_pktdat;
}
m = head->m_next;
while (m && (len > 0)) {
chunk = min(len, m->m_len);
bcopy(mtod(m, caddr_t), mtod(head, caddr_t) + head->m_len, chunk);
len -= chunk;
head->m_len += chunk;
m->m_len -= chunk;
m->m_data += chunk;
if (m->m_len <= 0) {
MFREE(m, head->m_next);
m = head->m_next;
}
}
}
}
tmp = sc->next_to_send;
/*
* On entering this loop we know that tmp points to a
* descriptor with a clear OWN bit.
*/
desc = sc->trans_ring + tmp;
len = ETHER_MIN_LEN;
for (m = head; m; m = m->m_next) {
desc->buff.mbuf = m;
addr = kvtop(m->m_data);
desc->md->md0 = addr;
desc->md->md1 = ((addr >> 16) & 0xff);
desc->md->md3 = 0;
desc->md->md2 = -m->m_len;
sc->pending_transmits++;
len -= m->m_len;
INC_MD_PTR(tmp, sc->ntdre)
desc = sc->trans_ring + tmp;
}
end_of_packet = tmp;
DEC_MD_PTR(tmp, sc->ntdre)
desc = sc->trans_ring + tmp;
desc->md->md1 |= ENP;
if (len > 0)
desc->md->md2 -= len;
/*
* Set OWN bits in reverse order, otherwise the Lance
* could start sending the packet before all the
* buffers have been relinquished by the host.
*/
while (tmp != sc->next_to_send) {
desc->md->md1 |= OWN;
DEC_MD_PTR(tmp, sc->ntdre)
desc = sc->trans_ring + tmp;
}
sc->next_to_send = end_of_packet;
desc->md->md1 |= STP | OWN;
} else {
sc->pending_transmits++;
desc = sc->trans_ring + sc->next_to_send;
len = mbuf_to_buffer(head, desc->buff.data);
desc->md->md3 = 0;
desc->md->md2 = -max(len, ETHER_MIN_LEN - ETHER_CRC_LEN);
desc->md->md1 |= OWN | STP | ENP;
INC_MD_PTR(sc->next_to_send, sc->ntdre)
}
/* Force an immediate poll of the transmit ring */
outw(sc->rdp, TDMD | INEA);
/*
* Set a timer so if the buggy Am7990.h shuts
* down we can wake it up.
*/
ifp->if_timer = 2;
#if NBPF > 0
if (sc->arpcom.ac_if.if_bpf)
bpf_mtap(&sc->arpcom.ac_if, head);
#endif
if (sc->nic.mem_mode != DMA_MBUF)
m_freem(head);
} while (sc->pending_transmits < NDESC(sc->ntdre));
/*
* Transmit ring is full so set IFF_OACTIVE
* since we can't buffer any more packets.
*/
sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
LNCSTATS(trans_ring_full)
}
static int
lnc_ioctl(struct ifnet * ifp, u_long command, caddr_t data)
{
struct lnc_softc *sc = ifp->if_softc;
int s, error = 0;
s = splimp();
switch (command) {
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
error = ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
#ifdef DEBUG
if (ifp->if_flags & IFF_DEBUG)
sc->lnc_debug = 1;
else
sc->lnc_debug = 0;
#endif
if (ifp->if_flags & IFF_PROMISC) {
if (!(sc->nic.mode & PROM)) {
sc->nic.mode |= PROM;
lnc_init(sc);
}
} else if (sc->nic.mode & PROM) {
sc->nic.mode &= ~PROM;
lnc_init(sc);
}
if ((ifp->if_flags & IFF_ALLMULTI) &&
!(sc->flags & LNC_ALLMULTI)) {
sc->flags |= LNC_ALLMULTI;
lnc_init(sc);
} else if (!(ifp->if_flags & IFF_ALLMULTI) &&
(sc->flags & LNC_ALLMULTI)) {
sc->flags &= ~LNC_ALLMULTI;
lnc_init(sc);
}
if ((ifp->if_flags & IFF_UP) == 0 &&
(ifp->if_flags & IFF_RUNNING) != 0) {
/*
* If interface is marked down and it is running,
* then stop it.
*/
lnc_stop(sc);
ifp->if_flags &= ~IFF_RUNNING;
} else if ((ifp->if_flags & IFF_UP) != 0 &&
(ifp->if_flags & IFF_RUNNING) == 0) {
/*
* If interface is marked up and it is stopped, then
* start it.
*/
lnc_init(sc);
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
lnc_init(sc);
error = 0;
break;
default:
error = EINVAL;
}
(void) splx(s);
return error;
}
static void
lnc_watchdog(struct ifnet *ifp)
{
log(LOG_ERR, "lnc%d: Device timeout -- Resetting\n", ifp->if_unit);
ifp->if_oerrors++;
lnc_reset(ifp->if_softc);
}
#ifdef DEBUG
void
lnc_dump_state(struct lnc_softc *sc)
{
int i;
printf("\nDriver/NIC [%d] state dump\n", sc->arpcom.ac_if.if_unit);
printf("Memory access mode: %b\n", sc->nic.mem_mode, MEM_MODES);
printf("Host memory\n");
printf("-----------\n");
printf("Receive ring: base = %p, next = %p\n",
(void *)sc->recv_ring, (void *)(sc->recv_ring + sc->recv_next));
for (i = 0; i < NDESC(sc->nrdre); i++)
printf("\t%d:%p md = %p buff = %p\n",
i, (void *)(sc->recv_ring + i),
(void *)(sc->recv_ring + i)->md,
(void *)(sc->recv_ring + i)->buff.data);
printf("Transmit ring: base = %p, next = %p\n",
(void *)sc->trans_ring, (void *)(sc->trans_ring + sc->trans_next));
for (i = 0; i < NDESC(sc->ntdre); i++)
printf("\t%d:%p md = %p buff = %p\n",
i, (void *)(sc->trans_ring + i),
(void *)(sc->trans_ring + i)->md,
(void *)(sc->trans_ring + i)->buff.data);
printf("Lance memory (may be on host(DMA) or card(SHMEM))\n");
printf("Init block = %p\n", (void *)sc->init_block);
printf("\tmode = %b rlen:rdra = %x:%x tlen:tdra = %x:%x\n",
sc->init_block->mode, INIT_MODE, sc->init_block->rlen,
sc->init_block->rdra, sc->init_block->tlen, sc->init_block->tdra);
printf("Receive descriptor ring\n");
for (i = 0; i < NDESC(sc->nrdre); i++)
printf("\t%d buffer = 0x%x%x, BCNT = %d,\tMCNT = %u,\tflags = %b\n",
i, ((sc->recv_ring + i)->md->md1 & HADR),
(sc->recv_ring + i)->md->md0,
-(short) (sc->recv_ring + i)->md->md2,
(sc->recv_ring + i)->md->md3,
(((sc->recv_ring + i)->md->md1 & ~HADR) >> 8), RECV_MD1);
printf("Transmit descriptor ring\n");
for (i = 0; i < NDESC(sc->ntdre); i++)
printf("\t%d buffer = 0x%x%x, BCNT = %d,\tflags = %b %b\n",
i, ((sc->trans_ring + i)->md->md1 & HADR),
(sc->trans_ring + i)->md->md0,
-(short) (sc->trans_ring + i)->md->md2,
((sc->trans_ring + i)->md->md1 >> 8), TRANS_MD1,
((sc->trans_ring + i)->md->md3 >> 10), TRANS_MD3);
printf("\nnext_to_send = %x\n", sc->next_to_send);
printf("\n CSR0 = %b CSR1 = %x CSR2 = %x CSR3 = %x\n\n",
read_csr(sc, CSR0), CSR0_FLAGS, read_csr(sc, CSR1),
read_csr(sc, CSR2), read_csr(sc, CSR3));
/* Set RAP back to CSR0 */
outw(sc->rap, CSR0);
}
void
mbuf_dump_chain(struct mbuf * m)
{
#define MBUF_FLAGS \
"\20\1M_EXT\2M_PKTHDR\3M_EOR\4UNKNOWN\5M_BCAST\6M_MCAST"
if (!m)
log(LOG_DEBUG, "m == NULL\n");
do {
log(LOG_DEBUG, "m = %p\n", (void *)m);
log(LOG_DEBUG, "m_hdr.mh_next = %p\n",
(void *)m->m_hdr.mh_next);
log(LOG_DEBUG, "m_hdr.mh_nextpkt = %p\n",
(void *)m->m_hdr.mh_nextpkt);
log(LOG_DEBUG, "m_hdr.mh_len = %d\n", m->m_hdr.mh_len);
log(LOG_DEBUG, "m_hdr.mh_data = %p\n",
(void *)m->m_hdr.mh_data);
log(LOG_DEBUG, "m_hdr.mh_type = %d\n", m->m_hdr.mh_type);
log(LOG_DEBUG, "m_hdr.mh_flags = %b\n", m->m_hdr.mh_flags,
MBUF_FLAGS);
if (!(m->m_hdr.mh_flags & (M_PKTHDR | M_EXT)))
log(LOG_DEBUG, "M_dat.M_databuf = %p\n",
(void *)m->M_dat.M_databuf);
else {
if (m->m_hdr.mh_flags & M_PKTHDR) {
log(LOG_DEBUG, "M_dat.MH.MH_pkthdr.len = %d\n",
m->M_dat.MH.MH_pkthdr.len);
log(LOG_DEBUG,
"M_dat.MH.MH_pkthdr.rcvif = %p\n",
(void *)m->M_dat.MH.MH_pkthdr.rcvif);
if (!(m->m_hdr.mh_flags & M_EXT))
log(LOG_DEBUG,
"M_dat.MH.MH_dat.MH_databuf = %p\n",
(void *)m->M_dat.MH.MH_dat.MH_databuf);
}
if (m->m_hdr.mh_flags & M_EXT) {
log(LOG_DEBUG,
"M_dat.MH.MH_dat.MH_ext.ext_buff %p\n",
(void *)m->M_dat.MH.MH_dat.MH_ext.ext_buf);
log(LOG_DEBUG,
"M_dat.MH.MH_dat.MH_ext.ext_free %p\n",
(void *)m->M_dat.MH.MH_dat.MH_ext.ext_free);
log(LOG_DEBUG,
"M_dat.MH.MH_dat.MH_ext.ext_size %d\n",
m->M_dat.MH.MH_dat.MH_ext.ext_size);
}
}
} while ((m = m->m_next) != NULL);
}
#endif
#endif
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