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