Category : Network Files
Archive : KA9Q.ZIP
Filename : TEST_EC.C
Output of file : TEST_EC.C contained in archive : KA9Q.ZIP
#define TIMER 20000 /* Timeout on transmissions */
#include
#include "global.h"
#include "mbuf.h"
#include "enet.h"
#include "iface.h"
#include "ec.h"
#include "timer.h"
#include "arp.h"
#include "trace.h"
void ec0vec(),ec1vec(),ec2vec();
void (*ecvec[])() = {ec0vec,ec1vec,ec2vec};
struct ec ec[EC_MAX]; /* Per-controller info */
unsigned nec = 0;
/* Initialize interface */
int
ec_init(interface,bufsize)
struct interface *interface;
unsigned bufsize; /* Maximum size of receive queue in PACKETS */
{
register struct ec *ecp;
register unsigned base;
void eaudit();
unsigned short getcs();
int16 dev;
dev = interface->dev;
ecp = &ec[dev];
base = ecp->base;
ecp->rcvmax = bufsize;
ecp->iface = interface;
/* Pulse IE_RESET */
outportb(IE_CSR(base),IE_RESET);
if(interface->hwaddr == NULLCHAR)
interface->hwaddr = malloc(EADDR_LEN);
getecaddr(base,interface->hwaddr);
setecaddr(base,interface->hwaddr);
if(memcmp(interface->hwaddr,ether_bdcst,EADDR_LEN) == 0){
printf("EC address PROM contains broadcast address!!\n");
return -1;
}
/* gain control of buffer */
outportb(IE_CSR(base),IE_SYSBFR);
/* Set transmit detect bits */
outportb(EDLC_XMT(base),EDLC_16 | EDLC_JAM);
/* Set up the receiver and flush status */
outportb(EDLC_RCV(base),EDLC_MULTI|EDLC_GOOD|EDLC_ANY|EDLC_SHORT
|EDLC_DRIBBLE|EDLC_FCS|EDLC_OVER);
inportb(EDLC_RCV(base));
/* Start receiver */
outportw(IE_RP(base),0); /* Reset read pointer */
outportb(IE_CSR(base),IE_RCVEDLC);
return 0;
}
/* Send an IP datagram on Ethernet */
int
ec_send(bp,interface,gateway,precedence,delay,throughput,reliability)
struct mbuf *bp; /* Buffer to send */
struct interface *interface; /* Pointer to interface control block */
int32 gateway; /* IP address of next hop */
char precedence;
char delay;
char throughput;
char reliability;
{
char *egate,*res_arp();
egate = res_arp(interface,ARP_ETHER,gateway,bp);
if(egate != NULLCHAR)
return (*interface->output)(interface,egate,interface->hwaddr,IP_TYPE,bp);
return 0;
}
/* Send a packet with Ethernet header */
int
ec_output(interface,dest,source,type,data)
struct interface *interface; /* Pointer to interface control block */
char dest[]; /* Destination Ethernet address */
char source[]; /* Source Ethernet address */
int16 type; /* Type field */
struct mbuf *data; /* Data field */
{
struct ether ep;
struct mbuf *bp;
memcpy(ep.dest,dest,EADDR_LEN);
memcpy(ep.source,source,EADDR_LEN);
ep.type = type;
if((bp = htonether(&ep,data)) == NULLBUF){
free_p(data);
return -1;
}
return (*interface->raw)(interface,bp);
}
/* Send raw packet (caller provides header) */
int
ec_raw(interface,bp)
struct interface *interface; /* Pointer to interface control block */
struct mbuf *bp; /* Data field */
{
register struct ec *ecp;
register unsigned base;
register int i;
short size;
ecp = &ec[interface->dev];
base = ecp->base;
ecp->estats.xmit++;
dump(interface,IF_TRACE_OUT,TRACE_ETHER,bp);
size = len_mbuf(bp);
/* Pad the size out to the minimum, if necessary,
* with junk from the last packet (nice security hole here)
*/
if(size < RUNT)
size = RUNT;
size = (size+1) & ~1; /* round size up to next even number */
/* Wait for transmitter ready, if necessary. IE_XMTBSY is valid
* only in the transmit mode, hence the initial check.
*/
if((inportb(IE_CSR(base)) & IE_BUFCTL) == IE_XMTEDLC){
for(i=TIMER;(inportb(IE_CSR(base)) & IE_XMTBSY) && i != 0;i--)
;
if(i == 0){
ecp->estats.timeout++;
free_p(bp);
return -1;
}
}
ecp->size = size;
/* Get control of the board buffer and disable receiver */
outportb(IE_CSR(base),IE_SYSBFR);
/* Point GP at beginning of packet */
outportw(IE_GP(base),BFRSIZ-size);
/* Actually load each piece with a fast assembler routine */
while(bp != NULLBUF){
outbuf(IE_BFR(base),bp->data,bp->cnt);
bp = free_mbuf(bp);
}
/* Start transmitter */
outportw(IE_GP(base),BFRSIZ-size);
outportb(IE_CSR(base),IE_XMTEDLC);
return 0;
}
ecint()
{
}
/* Service the Ethernet controller */
void
ec_recv(interface)
struct interface *interface;
{
register struct ec *ecp;
register unsigned base;
struct mbuf *bp;
int16 size;
char stat;
void arp_input();
int ip_route();
struct ether hdr;
char multicast;
ecp = &ec[interface->dev];
base = ec[interface->dev].base;
/* Check for transmit jam */
if(!(inportb(IE_CSR(base)) & IE_XMTBSY)){
stat = inportb(EDLC_XMT(base));
if(stat & EDLC_16){
ecp->estats.jam16++;
rcv_fixup(base);
} else if(stat & EDLC_JAM){
/* Crank counter back to beginning and restart transmit */
ecp->estats.jam++;
outportb(IE_CSR(base),IE_SYSBFR);
outportw(IE_GP(base),BFRSIZ - ecp->size);
outportb(IE_CSR(base),IE_XMTEDLC);
}
}
#ifdef foo
if(inportb(IE_CSR(base)) & IE_RCVBSY)
return;
#endif
for(;;){
stat = inportb(EDLC_RCV(base));
if(stat & EDLC_STALE)
break;
if(stat & EDLC_OVER){
ecp->estats.over++;
rcv_fixup(base);
continue;
}
if(stat & (EDLC_SHORT | EDLC_FCS | EDLC_DRIBBLE)){
ecp->estats.bad++;
rcv_fixup(base);
continue;
}
if(stat & EDLC_ANY){
/* Get control of the buffer */
outportw(IE_GP(base),0);
outportb(IE_CSR(base),IE_SYSBFR);
/* Allocate mbuf and copy the packet into it */
size = inportw(IE_RP(base));
if(size < RUNT || size > GIANT)
ecp->estats.bad++;
else if((bp = alloc_mbuf(size)) == NULLBUF)
ecp->estats.nomem++;
else {
ecp->estats.recv++;
inbuf(IE_BFR(base),bp->data,size);
bp->cnt = size;
dump(interface,IF_TRACE_IN,TRACE_ETHER,bp);
/* Remove Ethernet header and kick packet upstairs */
ntohether(&hdr,&bp);
if(hdr.dest[0] & 1)
multicast = 1;
else
multicast = 0;
switch(hdr.type){
case ARP_TYPE:
arp_input(interface,bp);
break;
case IP_TYPE:
ip_route(bp,multicast);
break;
default:
free_p(bp);
break;
}
}
outportb(IE_CSR(base),IE_RCVEDLC);
outportb(IE_RP(base),0);
}
}
}
static
rcv_fixup(base)
register unsigned base;
{
outportb(IE_CSR(base),IE_SYSBFR);
outportb(IE_CSR(base),IE_RCVEDLC);
outportb(IE_RP(base),0);
}
/* Read Ethernet address from controller PROM */
static
getecaddr(base,cp)
register unsigned base;
register char *cp;
{
register int i;
for(i=0;i
*cp++ = inportb(IE_SAPROM(base));
}
}
/* Set Ethernet address on controller */
static
setecaddr(base,cp)
register unsigned base;
register char *cp;
{
register int i;
for(i=0;i
}
/* Shut down the Ethernet controller */
ec_stop(interface)
struct interface *interface;
{
register unsigned base;
int16 dev;
dev = interface->dev;
base = ec[dev].base;
/* Pulse IE_RESET */
outportb(IE_CSR(base),IE_RESET);
outportb(IE_CSR(base),0);
}
/* Attach a 3-Com model 3C500 Ethernet controller to the system
* argv[0]: hardware type, must be "3c500"
* argv[1]: I/O address, e.g., "0x300"
* argv[2]: vector, e.g., "3"
* argv[3]: mode, must be "arpa"
* argv[4]: interface label, e.g., "ec0"
* argv[5]: maximum number of packets allowed on receive queue, e.g., "5"
* argv[6]: maximum transmission unit, bytes, e.g., "1500"
*/
ec_attach(argc,argv)
int argc;
char *argv[];
{
register struct interface *if_ec;
extern struct interface *ifaces;
unsigned dev;
int ec_init();
int ec_send();
void ec_recv();
int ec_stop();
int pether(),gaether();
arp_init(ARP_ETHER,EADDR_LEN,IP_TYPE,ARP_TYPE,ether_bdcst,pether,gaether);
if(nec >= EC_MAX){
printf("Too many Ethernet controllers\n");
return -1;
}
dev = nec++;
if((if_ec = (struct interface *)calloc(1,sizeof(struct interface))) == NULLIF
||(if_ec->name = malloc((unsigned)strlen(argv[4])+1)) == NULLCHAR){
printf("ec_attach: no memory!\n");
return -1;
}
strcpy(if_ec->name,argv[4]);
if_ec->mtu = atoi(argv[6]);
if_ec->send = ec_send;
if_ec->output = ec_output;
if_ec->raw = ec_raw;
if_ec->recv = ec_recv;
if_ec->stop = ec_stop;
if_ec->dev = dev;
ec[dev].base = htoi(argv[1]);
ec[dev].vec = htoi(argv[2]);
if(strcmp(argv[3],"arpa") != 0){
printf("Mode %s unknown for interface %s\n",
argv[3],argv[4]);
free(if_ec->name);
free((char *)if_ec);
return -1;
}
/* Initialize device */
if(ec_init(if_ec,(unsigned)atoi(argv[5])) != 0){
free(if_ec->name);
free((char *)if_ec);
return -1;
}
if_ec->next = ifaces;
ifaces = if_ec;
return 0;
}
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