minix/servers/inet/mnx_eth.c

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2005-04-21 16:53:53 +02:00
/*
inet/mnx_eth.c
Created: Jan 2, 1992 by Philip Homburg
Copyright 1995 Philip Homburg
*/
#include "inet.h"
#include "proto.h"
#include "osdep_eth.h"
#include "generic/type.h"
#include "generic/assert.h"
#include "generic/buf.h"
#include "generic/clock.h"
#include "generic/eth.h"
#include "generic/eth_int.h"
#include "generic/sr.h"
#include <minix/syslib.h>
#define _MINIX
#include <unistd.h>
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THIS_FILE
FORWARD _PROTOTYPE( void setup_read, (eth_port_t *eth_port) );
FORWARD _PROTOTYPE( void read_int, (eth_port_t *eth_port, int count) );
FORWARD _PROTOTYPE( void write_int, (eth_port_t *eth_port) );
FORWARD _PROTOTYPE( void eth_recvev, (event_t *ev, ev_arg_t ev_arg) );
FORWARD _PROTOTYPE( void eth_sendev, (event_t *ev, ev_arg_t ev_arg) );
FORWARD _PROTOTYPE( eth_port_t *find_port, (message *m) );
PUBLIC void osdep_eth_init()
{
int i, r, tasknr;
struct eth_conf *ecp;
eth_port_t *eth_port;
message mess, repl_mess;
for (i= 0, eth_port= eth_port_table, ecp= eth_conf;
i<eth_conf_nr; i++, eth_port++, ecp++)
{
#if DEAD_CODE
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r = sys_getprocnr(&tasknr, ecp->ec_task, strlen(ecp->ec_task));
#endif
r = findproc(ecp->ec_task, &tasknr);
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if (r != OK)
{
ip_panic(( "unable to find task %s: %d\n",
ecp->ec_task, r ));
}
eth_port->etp_osdep.etp_port= ecp->ec_port;
eth_port->etp_osdep.etp_task= tasknr;
ev_init(&eth_port->etp_osdep.etp_recvev);
mess.m_type= DL_INIT;
mess.DL_PORT= eth_port->etp_osdep.etp_port;
mess.DL_PROC= this_proc;
mess.DL_MODE= DL_NOMODE;
r= send(eth_port->etp_osdep.etp_task, &mess);
if (r<0)
{
#if !CRAMPED
printf(
"osdep_eth_init: unable to send to ethernet task, error= %d\n",
r);
#endif
continue;
}
if (receive(eth_port->etp_osdep.etp_task, &mess)<0)
ip_panic(("unable to receive"));
if (mess.m3_i1 == ENXIO)
{
#if !CRAMPED
printf(
"osdep_eth_init: no ethernet device at task=%d,port=%d\n",
eth_port->etp_osdep.etp_task,
eth_port->etp_osdep.etp_port);
#endif
continue;
}
if (mess.m3_i1 != eth_port->etp_osdep.etp_port)
ip_panic(("osdep_eth_init: DL_INIT error or wrong port: %d\n",
mess.m3_i1));
eth_port->etp_ethaddr= *(ether_addr_t *)mess.m3_ca1;
sr_add_minor(if2minor(ecp->ec_ifno, ETH_DEV_OFF),
i, eth_open, eth_close, eth_read,
eth_write, eth_ioctl, eth_cancel);
eth_port->etp_flags |= EPF_ENABLED;
eth_port->etp_wr_pack= 0;
eth_port->etp_rd_pack= 0;
setup_read (eth_port);
eth_port++;
}
}
PUBLIC void eth_write_port(eth_port, pack)
eth_port_t *eth_port;
acc_t *pack;
{
eth_port_t *loc_port;
message mess1, block_msg;
int i, pack_size;
acc_t *pack_ptr;
iovec_t *iovec;
u8_t *eth_dst_ptr;
int multicast, r;
ev_arg_t ev_arg;
assert(eth_port->etp_wr_pack == NULL);
eth_port->etp_wr_pack= pack;
iovec= eth_port->etp_osdep.etp_wr_iovec;
pack_size= 0;
for (i=0, pack_ptr= pack; i<IOVEC_NR && pack_ptr; i++,
pack_ptr= pack_ptr->acc_next)
{
iovec[i].iov_addr= (vir_bytes)ptr2acc_data(pack_ptr);
pack_size += iovec[i].iov_size= pack_ptr->acc_length;
}
if (i>= IOVEC_NR)
{
pack= bf_pack(pack); /* packet is too fragmented */
eth_port->etp_wr_pack= pack;
pack_size= 0;
for (i=0, pack_ptr= pack; i<IOVEC_NR && pack_ptr;
i++, pack_ptr= pack_ptr->acc_next)
{
iovec[i].iov_addr= (vir_bytes)ptr2acc_data(pack_ptr);
pack_size += iovec[i].iov_size= pack_ptr->acc_length;
}
}
assert (i< IOVEC_NR);
assert (pack_size >= ETH_MIN_PACK_SIZE);
if (i == 1)
{
/* simple packets can be sent using DL_WRITE instead of
* DL_WRITEV.
*/
mess1.DL_COUNT= iovec[0].iov_size;
mess1.DL_ADDR= (char *)iovec[0].iov_addr;
mess1.m_type= DL_WRITE;
}
else
{
mess1.DL_COUNT= i;
mess1.DL_ADDR= (char *)iovec;
mess1.m_type= DL_WRITEV;
}
mess1.DL_PORT= eth_port->etp_osdep.etp_port;
mess1.DL_PROC= this_proc;
mess1.DL_MODE= DL_NOMODE;
for (;;)
{
r= send (eth_port->etp_osdep.etp_task, &mess1);
if (r != ELOCKED)
break;
/* ethernet task is sending to this task, I hope */
r= receive(eth_port->etp_osdep.etp_task, &block_msg);
if (r < 0)
ip_panic(("unable to receive"));
loc_port= eth_port;
if (loc_port->etp_osdep.etp_port != block_msg.DL_PORT)
{
loc_port= find_port(&block_msg);
}
assert(block_msg.DL_STAT & (DL_PACK_SEND|DL_PACK_RECV));
if (block_msg.DL_STAT & DL_PACK_SEND)
{
assert(loc_port != eth_port);
loc_port->etp_osdep.etp_sendrepl= block_msg;
ev_arg.ev_ptr= loc_port;
ev_enqueue(&loc_port->etp_sendev, eth_sendev, ev_arg);
}
if (block_msg.DL_STAT & DL_PACK_RECV)
{
loc_port->etp_osdep.etp_recvrepl= block_msg;
ev_arg.ev_ptr= loc_port;
ev_enqueue(&loc_port->etp_osdep.etp_recvev,
eth_recvev, ev_arg);
}
}
if (r < 0)
ip_panic(("unable to send"));
r= receive(eth_port->etp_osdep.etp_task, &mess1);
if (r < 0)
ip_panic(("unable to receive"));
assert(mess1.m_type == DL_TASK_REPLY &&
mess1.DL_PORT == mess1.DL_PORT &&
mess1.DL_PROC == this_proc);
assert((mess1.DL_STAT >> 16) == OK);
if (mess1.DL_STAT & DL_PACK_RECV)
{
eth_port->etp_osdep.etp_recvrepl= mess1;
ev_arg.ev_ptr= eth_port;
ev_enqueue(&eth_port->etp_osdep.etp_recvev, eth_recvev,
ev_arg);
}
if (!(mess1.DL_STAT & DL_PACK_SEND))
{
/* Packet is not yet sent. */
return;
}
/* If the port is in promiscuous mode or the packet is
* broadcasted/multicasted, enqueue the reply packet.
*/
eth_dst_ptr= (u8_t *)ptr2acc_data(pack);
multicast= (*eth_dst_ptr & 1); /* low order bit indicates multicast */
if (multicast || (eth_port->etp_osdep.etp_recvconf & NWEO_EN_PROMISC))
{
eth_port->etp_osdep.etp_sendrepl= mess1;
ev_arg.ev_ptr= eth_port;
ev_enqueue(&eth_port->etp_sendev, eth_sendev, ev_arg);
/* Pretend that we didn't get a reply. */
return;
}
/* packet is sent */
bf_afree(eth_port->etp_wr_pack);
eth_port->etp_wr_pack= NULL;
}
PUBLIC void eth_rec(m)
message *m;
{
int i;
eth_port_t *loc_port;
int stat;
assert(m->m_type == DL_TASK_REPLY);
set_time (m->DL_CLCK);
for (i=0, loc_port= eth_port_table; i<eth_conf_nr; i++, loc_port++)
{
if (loc_port->etp_osdep.etp_port == m->DL_PORT &&
loc_port->etp_osdep.etp_task == m->m_source)
break;
}
if (i == eth_conf_nr)
{
ip_panic(("message from unknown source: %d:%d",
m->m_source, m->DL_PORT));
}
stat= m->DL_STAT & 0xffff;
assert(stat & (DL_PACK_SEND|DL_PACK_RECV));
if (stat & DL_PACK_SEND)
write_int(loc_port);
if (stat & DL_PACK_RECV)
read_int(loc_port, m->DL_COUNT);
}
#ifndef notdef
PUBLIC int eth_get_stat(eth_port, eth_stat)
eth_port_t *eth_port;
eth_stat_t *eth_stat;
{
acc_t *acc;
int result;
message mess, mlocked;
mess.m_type= DL_GETSTAT;
mess.DL_PORT= eth_port->etp_osdep.etp_port;
mess.DL_PROC= this_proc;
mess.DL_ADDR= (char *)eth_stat;
for (;;)
{
result= send(eth_port->etp_osdep.etp_task, &mess);
if (result != ELOCKED)
break;
result= receive(eth_port->etp_osdep.etp_task, &mlocked);
assert(result == OK);
compare(mlocked.m_type, ==, DL_TASK_REPLY);
eth_rec(&mlocked);
}
assert(result == OK);
result= receive(eth_port->etp_osdep.etp_task, &mess);
assert(result == OK);
assert(mess.m_type == DL_TASK_REPLY);
result= mess.DL_STAT >> 16;
assert (result == 0);
if (mess.DL_STAT)
{
#if DEBUG
{ where(); printf("calling eth_rec()\n"); }
#endif
eth_rec(&mess);
}
return OK;
}
#endif
#ifndef notdef
PUBLIC void eth_set_rec_conf (eth_port, flags)
eth_port_t *eth_port;
u32_t flags;
{
int result;
unsigned dl_flags;
message mess, repl_mess;
dl_flags= DL_NOMODE;
if (flags & NWEO_EN_BROAD)
dl_flags |= DL_BROAD_REQ;
if (flags & NWEO_EN_MULTI)
dl_flags |= DL_MULTI_REQ;
if (flags & NWEO_EN_PROMISC)
dl_flags |= DL_PROMISC_REQ;
mess.m_type= DL_INIT;
mess.DL_PORT= eth_port->etp_osdep.etp_port;
mess.DL_PROC= this_proc;
mess.DL_MODE= dl_flags;
do
{
result= send (eth_port->etp_osdep.etp_task, &mess);
if (result == ELOCKED)
/* Ethernet task is sending to this task, I hope */
{
if (receive (eth_port->etp_osdep.etp_task,
&repl_mess)< 0)
{
ip_panic(("unable to receive"));
}
compare(repl_mess.m_type, ==, DL_TASK_REPLY);
eth_rec(&repl_mess);
}
} while (result == ELOCKED);
if (result < 0)
ip_panic(("unable to send(%d)", result));
if (receive (eth_port->etp_osdep.etp_task, &repl_mess) < 0)
ip_panic(("unable to receive"));
assert (repl_mess.m_type == DL_INIT_REPLY);
if (repl_mess.m3_i1 != eth_port->etp_osdep.etp_port)
{
ip_panic(("got reply for wrong port"));
}
eth_port->etp_osdep.etp_recvconf= flags;
}
#endif
PRIVATE void write_int(eth_port)
eth_port_t *eth_port;
{
acc_t *pack;
int multicast;
u8_t *eth_dst_ptr;
pack= eth_port->etp_wr_pack;
eth_port->etp_wr_pack= NULL;
eth_dst_ptr= (u8_t *)ptr2acc_data(pack);
multicast= (*eth_dst_ptr & 1); /* low order bit indicates multicast */
if (multicast || (eth_port->etp_osdep.etp_recvconf & NWEO_EN_PROMISC))
eth_arrive(eth_port, pack, bf_bufsize(pack));
else
bf_afree(pack);
eth_restart_write(eth_port);
}
PRIVATE void read_int(eth_port, count)
eth_port_t *eth_port;
int count;
{
acc_t *pack, *cut_pack;
pack= eth_port->etp_rd_pack;
eth_port->etp_rd_pack= NULL;
cut_pack= bf_cut(pack, 0, count);
bf_afree(pack);
eth_arrive(eth_port, cut_pack, count);
eth_port->etp_flags &= ~(EPF_READ_IP|EPF_READ_SP);
setup_read(eth_port);
}
PRIVATE void setup_read(eth_port)
eth_port_t *eth_port;
{
eth_port_t *loc_port;
acc_t *pack, *pack_ptr;
message mess1, block_msg;
iovec_t *iovec;
ev_arg_t ev_arg;
int i, r;
assert(!(eth_port->etp_flags & (EPF_READ_IP|EPF_READ_SP)));
do
{
assert (!eth_port->etp_rd_pack);
iovec= eth_port->etp_osdep.etp_rd_iovec;
pack= bf_memreq (ETH_MAX_PACK_SIZE);
for (i=0, pack_ptr= pack; i<RD_IOVEC && pack_ptr;
i++, pack_ptr= pack_ptr->acc_next)
{
iovec[i].iov_addr= (vir_bytes)ptr2acc_data(pack_ptr);
iovec[i].iov_size= (vir_bytes)pack_ptr->acc_length;
}
assert (!pack_ptr);
mess1.m_type= DL_READV;
mess1.DL_PORT= eth_port->etp_osdep.etp_port;
mess1.DL_PROC= this_proc;
mess1.DL_COUNT= i;
mess1.DL_ADDR= (char *)iovec;
for (;;)
{
r= send (eth_port->etp_osdep.etp_task, &mess1);
if (r != ELOCKED)
break;
/* ethernet task is sending to this task, I hope */
r= receive(eth_port->etp_osdep.etp_task, &block_msg);
if (r < 0)
ip_panic(("unable to receive"));
loc_port= eth_port;
if (loc_port->etp_osdep.etp_port != block_msg.DL_PORT)
{
loc_port= find_port(&block_msg);
}
assert(block_msg.DL_STAT &
(DL_PACK_SEND|DL_PACK_RECV));
if (block_msg.DL_STAT & DL_PACK_SEND)
{
loc_port->etp_osdep.etp_sendrepl= block_msg;
ev_arg.ev_ptr= loc_port;
ev_enqueue(&loc_port->etp_sendev, eth_sendev,
ev_arg);
}
if (block_msg.DL_STAT & DL_PACK_RECV)
{
assert(loc_port != eth_port);
loc_port->etp_osdep.etp_recvrepl= block_msg;
ev_arg.ev_ptr= loc_port;
ev_enqueue(&loc_port->etp_osdep.etp_recvev,
eth_recvev, ev_arg);
}
}
if (r < 0)
ip_panic(("unable to send"));
r= receive (eth_port->etp_osdep.etp_task, &mess1);
if (r < 0)
ip_panic(("unable to receive"));
assert (mess1.m_type == DL_TASK_REPLY &&
mess1.DL_PORT == mess1.DL_PORT &&
mess1.DL_PROC == this_proc);
compare((mess1.DL_STAT >> 16), ==, OK);
if (mess1.DL_STAT & DL_PACK_RECV)
{
/* packet received */
pack_ptr= bf_cut(pack, 0, mess1.DL_COUNT);
bf_afree(pack);
eth_arrive(eth_port, pack_ptr, mess1.DL_COUNT);
}
else
{
/* no packet received */
eth_port->etp_rd_pack= pack;
eth_port->etp_flags |= EPF_READ_IP;
}
if (mess1.DL_STAT & DL_PACK_SEND)
{
eth_port->etp_osdep.etp_sendrepl= mess1;
ev_arg.ev_ptr= eth_port;
ev_enqueue(&eth_port->etp_sendev, eth_sendev, ev_arg);
}
} while (!(eth_port->etp_flags & EPF_READ_IP));
eth_port->etp_flags |= EPF_READ_SP;
}
PRIVATE void eth_recvev(ev, ev_arg)
event_t *ev;
ev_arg_t ev_arg;
{
eth_port_t *eth_port;
message *m_ptr;
eth_port= ev_arg.ev_ptr;
assert(ev == &eth_port->etp_osdep.etp_recvev);
m_ptr= &eth_port->etp_osdep.etp_recvrepl;
assert(m_ptr->m_type == DL_TASK_REPLY);
assert(eth_port->etp_osdep.etp_port == m_ptr->DL_PORT);
assert(m_ptr->DL_STAT & DL_PACK_RECV);
m_ptr->DL_STAT &= ~DL_PACK_RECV;
read_int(eth_port, m_ptr->DL_COUNT);
}
PRIVATE void eth_sendev(ev, ev_arg)
event_t *ev;
ev_arg_t ev_arg;
{
eth_port_t *eth_port;
message *m_ptr;
eth_port= ev_arg.ev_ptr;
assert(ev == &eth_port->etp_sendev);
m_ptr= &eth_port->etp_osdep.etp_sendrepl;
assert (m_ptr->m_type == DL_TASK_REPLY);
assert(eth_port->etp_osdep.etp_port == m_ptr->DL_PORT);
assert(m_ptr->DL_STAT & DL_PACK_SEND);
m_ptr->DL_STAT &= ~DL_PACK_SEND;
/* packet is sent */
write_int(eth_port);
}
PRIVATE eth_port_t *find_port(m)
message *m;
{
eth_port_t *loc_port;
int i;
for (i=0, loc_port= eth_port_table; i<eth_conf_nr; i++, loc_port++)
{
if (loc_port->etp_osdep.etp_port == m->DL_PORT)
break;
}
assert (i<eth_conf_nr);
return loc_port;
}
/*
* $PchId: mnx_eth.c,v 1.8 1995/11/21 06:41:57 philip Exp $
*/