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freebsd-skq/sys/i4b/driver/i4b_trace.c

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/*
* Copyright (c) 1997, 1999 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.
*
*---------------------------------------------------------------------------
*
* i4btrc - device driver for trace data read device
* ---------------------------------------------------
*
* $Id: i4b_trace.c,v 1.24 1999/12/13 21:25:24 hm Exp $
*
* last edit-date: [Mon Dec 13 21:39:35 1999]
*
* $FreeBSD$
*
* NOTE: the code assumes that SPLI4B >= splimp !
*
*---------------------------------------------------------------------------*/
#include "i4btrc.h"
#if NI4BTRC > 0
#ifdef __FreeBSD__
#include "isic.h" /* 'isic' is no pseudo-device on non FreeBSD -
* so we just can't count it at compile time,
* we're doing an attach-time check instead. */
#if NI4BTRC < NISIC
#error "number of trace devices != number of passive ISDN controllers !"
#error "change number of i4btrc to be equal to number of isic devices !"
#endif
#endif /* __FreeBSD__ */
#include <sys/param.h>
#include <sys/systm.h>
#if defined(__FreeBSD__) && __FreeBSD__ >= 3
#include <sys/ioccom.h>
#else
#include <sys/ioctl.h>
#endif
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/proc.h>
#include <sys/tty.h>
#ifdef __FreeBSD__
#ifdef DEVFS
#include <sys/devfsext.h>
#endif
#include <machine/i4b_trace.h>
#include <machine/i4b_ioctl.h>
#else
#include <i4b/i4b_trace.h>
#include <i4b/i4b_ioctl.h>
#endif
#include <i4b/include/i4b_mbuf.h>
#include <i4b/include/i4b_global.h>
#include <i4b/include/i4b_l3l4.h>
#ifndef __FreeBSD__
#define memcpy(d,s,l) bcopy(s,d,l)
#endif
static struct ifqueue trace_queue[NI4BTRC];
static int device_state[NI4BTRC];
#define ST_IDLE 0x00
#define ST_ISOPEN 0x01
#define ST_WAITDATA 0x02
#if defined(__FreeBSD__) && __FreeBSD__ == 3
#ifdef DEVFS
static void *devfs_token[NI4BTRC];
#endif
#endif
static int analyzemode = 0;
static int rxunit = -1;
static int txunit = -1;
static int outunit = -1;
#ifndef __FreeBSD__
#define PDEVSTATIC /* - not static - */
void i4btrcattach __P((void));
int i4btrcopen __P((dev_t dev, int flag, int fmt, struct proc *p));
int i4btrcclose __P((dev_t dev, int flag, int fmt, struct proc *p));
int i4btrcread __P((dev_t dev, struct uio * uio, int ioflag));
#ifdef __bsdi__
int i4btrcioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p));
#else
int i4btrcioctl __P((dev_t dev, int cmd, caddr_t data, int flag, struct proc *p));
#endif
#endif
#if BSD > 199306 && defined(__FreeBSD__)
#define PDEVSTATIC static
static d_open_t i4btrcopen;
static d_close_t i4btrcclose;
static d_read_t i4btrcread;
static d_ioctl_t i4btrcioctl;
#ifdef OS_USES_POLL
static d_poll_t i4btrcpoll;
#define POLLFIELD i4btrcpoll
#else
#define POLLFIELD noselect
#endif
#define CDEV_MAJOR 59
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
static struct cdevsw i4btrc_cdevsw = {
/* open */ i4btrcopen,
/* close */ i4btrcclose,
/* read */ i4btrcread,
/* write */ nowrite,
/* ioctl */ i4btrcioctl,
/* poll */ POLLFIELD,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "i4btrc",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
/* bmaj */ -1
};
#else
static struct cdevsw i4btrc_cdevsw = {
i4btrcopen, i4btrcclose, i4btrcread, nowrite,
i4btrcioctl, nostop, noreset, nodevtotty,
POLLFIELD, nommap, NULL, "i4btrc", NULL, -1
};
#endif
/*---------------------------------------------------------------------------*
* interface init routine
*---------------------------------------------------------------------------*/
static
void i4btrcinit(void *unused)
{
#if defined(__FreeBSD__) && __FreeBSD__ >= 4
cdevsw_add(&i4btrc_cdevsw);
#else
dev_t dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev, &i4btrc_cdevsw, NULL);
#endif
}
SYSINIT(i4btrcdev, SI_SUB_DRIVERS,
SI_ORDER_MIDDLE+CDEV_MAJOR, &i4btrcinit, NULL);
static void i4btrcattach(void *);
PSEUDO_SET(i4btrcattach, i4b_trace);
#endif /* BSD > 199306 && defined(__FreeBSD__) */
#ifdef __bsdi__
#include <sys/device.h>
int i4btrcmatch(struct device *parent, struct cfdata *cf, void *aux);
void dummy_i4btrcattach(struct device*, struct device *, void *);
#define CDEV_MAJOR 60
static struct cfdriver i4btrccd =
{ NULL, "i4btrc", i4btrcmatch, dummy_i4btrcattach, DV_DULL,
sizeof(struct cfdriver) };
struct devsw i4btrcsw =
{ &i4btrccd,
i4btrcopen, i4btrcclose, i4btrcread, nowrite,
i4btrcioctl, seltrue, nommap, nostrat,
nodump, nopsize, 0, nostop
};
int
i4btrcmatch(struct device *parent, struct cfdata *cf, void *aux)
{
printf("i4btrcmatch: aux=0x%x\n", aux);
return 1;
}
void
dummy_i4btrcattach(struct device *parent, struct device *self, void *aux)
{
printf("dummy_i4btrcattach: aux=0x%x\n", aux);
}
#endif /* __bsdi__ */
int get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf);
/*---------------------------------------------------------------------------*
* interface attach routine
*---------------------------------------------------------------------------*/
PDEVSTATIC void
#ifdef __FreeBSD__
i4btrcattach(void *dummy)
#else
i4btrcattach()
#endif
{
int i;
#ifndef HACK_NO_PSEUDO_ATTACH_MSG
printf("i4btrc: %d ISDN trace device(s) attached\n", NI4BTRC);
#endif
for(i=0; i < NI4BTRC; i++)
{
#if defined(__FreeBSD__)
#if __FreeBSD__ < 4
#ifdef DEVFS
devfs_token[i]
= devfs_add_devswf(&i4btrc_cdevsw, i, DV_CHR,
UID_ROOT, GID_WHEEL, 0600,
"i4btrc%d", i);
#endif
#else
make_dev(&i4btrc_cdevsw, i,
UID_ROOT, GID_WHEEL, 0600, "i4btrc%d", i);
#endif
#endif
trace_queue[i].ifq_maxlen = IFQ_MAXLEN;
device_state[i] = ST_IDLE;
}
}
/*---------------------------------------------------------------------------*
* get_trace_data_from_l1()
* ------------------------
* is called from layer 1, adds timestamp to trace data and puts
* it into a queue, from which it can be read from the i4btrc
* device. The unit number in the trace header selects the minor
* device's queue the data is put into.
*---------------------------------------------------------------------------*/
int
get_trace_data_from_l1(i4b_trace_hdr_t *hdr, int len, char *buf)
{
struct mbuf *m;
int x;
int unit;
int trunc = 0;
int totlen = len + sizeof(i4b_trace_hdr_t);
/*
* for telephony (or better non-HDLC HSCX mode) we get
* (MCLBYTE + sizeof(i4b_trace_hdr_t)) length packets
* to put into the queue to userland. because of this
* we detect this situation, strip the length to MCLBYTES
* max size, and infor the userland program of this fact
* by putting the no of truncated bytes into hdr->trunc.
*/
if(totlen > MCLBYTES)
{
trunc = 1;
hdr->trunc = totlen - MCLBYTES;
totlen = MCLBYTES;
}
else
{
hdr->trunc = 0;
}
/* set length of trace record */
hdr->length = totlen;
/* check valid unit no */
if((unit = hdr->unit) > NI4BTRC)
{
printf("i4b_trace: get_trace_data_from_l1 - unit > NI4BTRC!\n");
return(0);
}
/* get mbuf */
if(!(m = i4b_Bgetmbuf(totlen)))
{
printf("i4b_trace: get_trace_data_from_l1 - i4b_getmbuf() failed!\n");
return(0);
}
/* check if we are in analyzemode */
if(analyzemode && (unit == rxunit || unit == txunit))
{
if(unit == rxunit)
hdr->dir = FROM_NT;
else
hdr->dir = FROM_TE;
unit = outunit;
}
if(IF_QFULL(&trace_queue[unit]))
{
struct mbuf *m1;
x = SPLI4B();
IF_DEQUEUE(&trace_queue[unit], m1);
splx(x);
i4b_Bfreembuf(m1);
}
/* copy trace header */
memcpy(m->m_data, hdr, sizeof(i4b_trace_hdr_t));
/* copy trace data */
if(trunc)
memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, totlen-sizeof(i4b_trace_hdr_t));
else
memcpy(&m->m_data[sizeof(i4b_trace_hdr_t)], buf, len);
x = SPLI4B();
IF_ENQUEUE(&trace_queue[unit], m);
if(device_state[unit] & ST_WAITDATA)
{
device_state[unit] &= ~ST_WAITDATA;
wakeup((caddr_t) &trace_queue[unit]);
}
splx(x);
return(1);
}
/*---------------------------------------------------------------------------*
* open trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcopen(dev_t dev, int flag, int fmt, struct proc *p)
{
int x;
int unit = minor(dev);
if(unit > NI4BTRC)
return(ENXIO);
if(device_state[unit] & ST_ISOPEN)
return(EBUSY);
if(analyzemode && (unit == outunit || unit == rxunit || unit == txunit))
return(EBUSY);
x = SPLI4B();
device_state[unit] = ST_ISOPEN;
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* close trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcclose(dev_t dev, int flag, int fmt, struct proc *p)
{
int unit = minor(dev);
int i, x, cno = -1;
for(i = 0; i < nctrl; i++)
{
if(ctrl_desc[i].N_SET_TRACE)
{
cno = i;
break;
}
}
if(analyzemode && (unit == outunit))
{
analyzemode = 0;
outunit = -1;
if(cno >= 0)
{
ctrl_desc[cno].N_SET_TRACE(rxunit, TRACE_OFF);
ctrl_desc[cno].N_SET_TRACE(txunit, TRACE_OFF);
}
rxunit = -1;
txunit = -1;
}
if(cno >= 0)
{
ctrl_desc[cno].N_SET_TRACE(unit, TRACE_OFF);
}
x = SPLI4B();
device_state[unit] = ST_IDLE;
splx(x);
return(0);
}
/*---------------------------------------------------------------------------*
* read from trace device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcread(dev_t dev, struct uio * uio, int ioflag)
{
struct mbuf *m;
int x;
int error = 0;
int unit = minor(dev);
if(!(device_state[unit] & ST_ISOPEN))
return(EIO);
x = SPLI4B();
while(IF_QEMPTY(&trace_queue[unit]) && (device_state[unit] & ST_ISOPEN))
{
device_state[unit] |= ST_WAITDATA;
if((error = tsleep((caddr_t) &trace_queue[unit],
TTIPRI | PCATCH,
"bitrc", 0 )) != 0)
{
device_state[unit] &= ~ST_WAITDATA;
splx(x);
return(error);
}
}
IF_DEQUEUE(&trace_queue[unit], m);
if(m && m->m_len)
error = uiomove(m->m_data, m->m_len, uio);
else
error = EIO;
if(m)
i4b_Bfreembuf(m);
splx(x);
return(error);
}
#if defined(__FreeBSD__) && defined(OS_USES_POLL)
/*---------------------------------------------------------------------------*
* poll device
*---------------------------------------------------------------------------*/
PDEVSTATIC int
i4btrcpoll(dev_t dev, int events, struct proc *p)
{
return(ENODEV);
}
#endif
/*---------------------------------------------------------------------------*
* device driver ioctl routine
*---------------------------------------------------------------------------*/
PDEVSTATIC int
#if defined (__FreeBSD_version) && __FreeBSD_version >= 300003
i4btrcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#elif defined(__bsdi__)
i4btrcioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)
#else
i4btrcioctl(dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
#endif
{
int error = 0;
int unit = minor(dev);
i4b_trace_setupa_t *tsa;
int i, cno = -1;
/* find the first passive controller to get at the set/get function
pointers. Would be better if we had the controller class virtual
function table separate from the port registry... */
for(i=0; i < nctrl; i++)
{
if(ctrl_desc[i].N_SET_TRACE)
{
cno = i; /* one suitable controller, might not */
break; /* be related to the trace unit at all, but */
} /* has the right function pointers */
}
switch(cmd)
{
case I4B_TRC_GET:
if(cno < 0)
return ENOTTY;
*(int *)data = ctrl_desc[cno].N_GET_TRACE(unit);
break;
case I4B_TRC_SET:
if(cno < 0)
return ENOTTY;
ctrl_desc[cno].N_SET_TRACE(unit, *(int *)data);
break;
case I4B_TRC_SETA:
tsa = (i4b_trace_setupa_t *)data;
if(tsa->rxunit >= 0 && tsa->rxunit < NI4BTRC)
rxunit = tsa->rxunit;
else
error = EINVAL;
if(tsa->txunit >= 0 && tsa->txunit < NI4BTRC)
txunit = tsa->txunit;
else
error = EINVAL;
if(error)
{
outunit = -1;
rxunit = -1;
txunit = -1;
}
else
{
if(cno < 0)
return ENOTTY;
outunit = unit;
analyzemode = 1;
ctrl_desc[cno].N_SET_TRACE(rxunit, tsa->rxflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX));
ctrl_desc[cno].N_SET_TRACE(txunit, tsa->txflags & (TRACE_I | TRACE_D_RX | TRACE_B_RX));
}
break;
case I4B_TRC_RESETA:
analyzemode = 0;
outunit = -1;
rxunit = -1;
txunit = -1;
break;
default:
error = ENOTTY;
break;
}
return(error);
}
#endif /* NI4BTRC > 0 */
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