freebsd-dev/sys/i4b/layer1/itjc/i4b_itjc_l1.c

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/*
* Copyright (c) 1997, 2001 Hellmuth Michaelis. 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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.
*
*---------------------------------------------------------------------------
*
* i4b_itjc_l1.c - NetJet-S layer 1 handler
* ---------------------------------------------
*
* $FreeBSD$
*
* last edit-date: [Wed Jan 10 17:16:19 2001]
*
*---------------------------------------------------------------------------*/
#include "itjc.h"
#include "pci.h"
#if (NITJC > 0) && (NPCI > 0)
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <machine/stdarg.h>
#include <machine/clock.h>
#include <net/if.h>
#include <machine/i4b_debug.h>
#include <machine/i4b_ioctl.h>
#include <machine/i4b_trace.h>
#include <i4b/layer1/isic/i4b_isic.h>
#include <i4b/layer1/isic/i4b_isac.h>
#include <i4b/layer1/itjc/i4b_itjc_ext.h>
#include <i4b/layer1/i4b_l1.h>
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-DATA-REQUEST
* =========================
*
* parms:
* unit physical interface unit number
* m mbuf containing L2 frame to be sent out
* freeflag MBUF_FREE: free mbuf here after having sent
* it out
* MBUF_DONTFREE: mbuf is freed by Layer 2
* returns:
* ==0 fail, nothing sent out
* !=0 ok, frame sent out
*
*---------------------------------------------------------------------------*/
int
itjc_ph_data_req(int unit, struct mbuf *m, int freeflag)
{
u_char cmd;
int s;
struct l1_softc *sc = itjc_scp[unit];
NDBGL1(L1_PRIM, "PH-DATA-REQ, unit %d, freeflag=%d", unit, freeflag);
if(m == NULL) /* failsafe */
return (0);
s = SPLI4B();
if(sc->sc_I430state == ST_F3) /* layer 1 not running ? */
{
NDBGL1(L1_I_ERR, "still in state F3!");
itjc_ph_activate_req(unit);
}
if(sc->sc_state & ISAC_TX_ACTIVE)
{
if(sc->sc_obuf2 == NULL)
{
sc->sc_obuf2 = m; /* save mbuf ptr */
if(freeflag)
sc->sc_freeflag2 = 1; /* IRQ must mfree */
else
sc->sc_freeflag2 = 0; /* IRQ must not mfree */
NDBGL1(L1_I_MSG, "using 2nd ISAC TX buffer, state = %s", itjc_printstate(sc));
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0ITJCUNIT(unit);
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
}
splx(s);
return(1);
}
NDBGL1(L1_I_ERR, "No Space in TX FIFO, state = %s", itjc_printstate(sc));
if(freeflag == MBUF_FREE)
i4b_Dfreembuf(m);
splx(s);
return (0);
}
if(sc->sc_trace & TRACE_D_TX)
{
i4b_trace_hdr_t hdr;
hdr.unit = L0ITJCUNIT(unit);
hdr.type = TRC_CH_D;
hdr.dir = FROM_TE;
hdr.count = ++sc->sc_trace_dcount;
MICROTIME(hdr.time);
i4b_l1_trace_ind(&hdr, m->m_len, m->m_data);
}
sc->sc_state |= ISAC_TX_ACTIVE; /* set transmitter busy flag */
NDBGL1(L1_I_MSG, "ISAC_TX_ACTIVE set");
sc->sc_freeflag = 0; /* IRQ must NOT mfree */
ISAC_WRFIFO(m->m_data, min(m->m_len, ISAC_FIFO_LEN)); /* output to TX fifo */
if(m->m_len > ISAC_FIFO_LEN) /* message > 32 bytes ? */
{
sc->sc_obuf = m; /* save mbuf ptr */
sc->sc_op = m->m_data + ISAC_FIFO_LEN; /* ptr for irq hdl */
sc->sc_ol = m->m_len - ISAC_FIFO_LEN; /* length for irq hdl */
if(freeflag)
sc->sc_freeflag = 1; /* IRQ must mfree */
cmd = ISAC_CMDR_XTF;
}
else
{
sc->sc_obuf = NULL;
sc->sc_op = NULL;
sc->sc_ol = 0;
if(freeflag)
i4b_Dfreembuf(m);
cmd = ISAC_CMDR_XTF | ISAC_CMDR_XME;
}
ISAC_WRITE(I_CMDR, cmd);
ISACCMDRWRDELAY();
splx(s);
return(1);
}
/*---------------------------------------------------------------------------*
*
* L2 -> L1: PH-ACTIVATE-REQUEST
* =============================
*
* parms:
* unit physical interface unit number
*
* returns:
* ==0
* !=0
*
*---------------------------------------------------------------------------*/
int
itjc_ph_activate_req(int unit)
{
struct l1_softc *sc = itjc_scp[unit];
NDBGL1(L1_PRIM, "PH-ACTIVATE-REQ, unit %d", unit);
itjc_next_state(sc, EV_PHAR);
return(0);
}
/*---------------------------------------------------------------------------*
* command from the upper layers
*---------------------------------------------------------------------------*/
int
itjc_mph_command_req(int unit, int command, void *parm)
{
struct l1_softc *sc = itjc_scp[unit];
switch(command)
{
case CMR_DOPEN: /* daemon running */
NDBGL1(L1_PRIM, "unit %d, command = CMR_DOPEN", unit);
sc->sc_enabled = 1;
break;
case CMR_DCLOSE: /* daemon not running */
NDBGL1(L1_PRIM, "unit %d, command = CMR_DCLOSE", unit);
sc->sc_enabled = 0;
break;
case CMR_SETTRACE:
NDBGL1(L1_PRIM, "unit %d, command = CMR_SETTRACE, parm = %d", unit, (unsigned int)parm);
sc->sc_trace = (unsigned int)parm;
break;
default:
NDBGL1(L1_ERROR, "ERROR, unknown command = %d, unit = %d, parm = %d", command, unit, (unsigned int)parm);
break;
}
return(0);
}
#endif /* NITJC > 0 */