+++ /dev/null
-/*
- * Copyright 2003 Digi International (www.digi.com)
- * Scott H Kilau <Scott_Kilau at digi dot com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- * NOTE TO LINUX KERNEL HACKERS: DO NOT REFORMAT THIS CODE!
- *
- * This is shared code between Digi's CVS archive and the
- * Linux Kernel sources.
- * Changing the source just for reformatting needlessly breaks
- * our CVS diff history.
- *
- * Send any bug fixes/changes to: Eng.Linux at digi dot com.
- * Thank you.
- *
- */
-
-
-#include <linux/kernel.h>
-#include <linux/sched.h> /* For jiffies, task states */
-#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */
-#include <linux/vmalloc.h>
-
-#include "dgap_driver.h"
-#include "dgap_trace.h"
-
-#define TRC_TO_CONSOLE 1
-
-/* file level globals */
-static char *dgap_trcbuf; /* the ringbuffer */
-
-#if defined(TRC_TO_KMEM)
-static int dgap_trcbufi = 0; /* index of the tilde at the end of */
-#endif
-
-extern int dgap_trcbuf_size; /* size of the ringbuffer */
-
-#if defined(TRC_TO_KMEM)
-static DEFINE_SPINLOCK(dgap_tracef_lock);
-#endif
-
-#if 0
-
-#if !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE)
-void dgap_tracef(const char *fmt, ...)
-{
- return;
-}
-
-#else /* !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) */
-
-void dgap_tracef(const char *fmt, ...)
-{
- va_list ap;
- char buf[TRC_MAXMSG+1];
- size_t lenbuf;
- int i;
- static int failed = FALSE;
-# if defined(TRC_TO_KMEM)
- unsigned long flags;
-#endif
-
- if(failed)
- return;
-# if defined(TRC_TO_KMEM)
- DGAP_LOCK(dgap_tracef_lock, flags);
-#endif
-
- /* Format buf using fmt and arguments contained in ap. */
- va_start(ap, fmt);
- i = vsprintf(buf, fmt, ap);
- va_end(ap);
- lenbuf = strlen(buf);
-
-# if defined(TRC_TO_KMEM)
- {
- static int initd=0;
-
- /*
- * Now, in addition to (or instead of) printing this stuff out
- * (which is a buffered operation), also tuck it away into a
- * corner of memory which can be examined post-crash in kdb.
- */
- if (!initd) {
- dgap_trcbuf = (char *) vmalloc(dgap_trcbuf_size);
- if(!dgap_trcbuf) {
- failed = TRUE;
- printk("dgap: tracing init failed!\n");
- return;
- }
-
- memset(dgap_trcbuf, '\0', dgap_trcbuf_size);
- dgap_trcbufi = 0;
- initd++;
-
- printk("dgap: tracing enabled - " TRC_DTRC
- " 0x%lx 0x%x\n",
- (unsigned long)dgap_trcbuf,
- dgap_trcbuf_size);
- }
-
-# if defined(TRC_ON_OVERFLOW_WRAP_AROUND)
- /*
- * This is the less CPU-intensive way to do things. We simply
- * wrap around before we fall off the end of the buffer. A
- * tilde (~) demarcates the current end of the trace.
- *
- * This method should be used if you are concerned about race
- * conditions as it is less likely to affect the timing of
- * things.
- */
-
- if (dgap_trcbufi + lenbuf >= dgap_trcbuf_size) {
- /* We are wrapping, so wipe out the last tilde. */
- dgap_trcbuf[dgap_trcbufi] = '\0';
- /* put the new string at the beginning of the buffer */
- dgap_trcbufi = 0;
- }
-
- strcpy(&dgap_trcbuf[dgap_trcbufi], buf);
- dgap_trcbufi += lenbuf;
- dgap_trcbuf[dgap_trcbufi] = '~';
-
-# elif defined(TRC_ON_OVERFLOW_SHIFT_BUFFER)
- /*
- * This is the more CPU-intensive way to do things. If we
- * venture into the last 1/8 of the buffer, we shift the
- * last 7/8 of the buffer forward, wiping out the first 1/8.
- * Advantage: No wrap-around, only truncation from the
- * beginning.
- *
- * This method should not be used if you are concerned about
- * timing changes affecting the behaviour of the driver (ie,
- * race conditions).
- */
- strcpy(&dgap_trcbuf[dgap_trcbufi], buf);
- dgap_trcbufi += lenbuf;
- dgap_trcbuf[dgap_trcbufi] = '~';
- dgap_trcbuf[dgap_trcbufi+1] = '\0';
-
- /* If we're near the end of the trace buffer... */
- if (dgap_trcbufi > (dgap_trcbuf_size/8)*7) {
- /* Wipe out the first eighth to make some more room. */
- strcpy(dgap_trcbuf, &dgap_trcbuf[dgap_trcbuf_size/8]);
- dgap_trcbufi = strlen(dgap_trcbuf)-1;
- /* Plop overflow message at the top of the buffer. */
- bcopy(TRC_OVERFLOW, dgap_trcbuf, strlen(TRC_OVERFLOW));
- }
-# else
-# error "TRC_ON_OVERFLOW_WRAP_AROUND or TRC_ON_OVERFLOW_SHIFT_BUFFER?"
-# endif
- }
- DGAP_UNLOCK(dgap_tracef_lock, flags);
-
-# endif /* defined(TRC_TO_KMEM) */
-}
-
-#endif /* !defined(TRC_TO_KMEM) && !defined(TRC_TO_CONSOLE) */
-
-#endif
-
-/*
- * dgap_tracer_free()
- *
- *
- */
-void dgap_tracer_free(void)
-{
- if(dgap_trcbuf)
- vfree(dgap_trcbuf);
-}
+++ /dev/null
-/*
- * Copyright 2003 Digi International (www.digi.com)
- * Scott H Kilau <Scott_Kilau at digi dot com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * NOTE: THIS IS A SHARED HEADER. DO NOT CHANGE CODING STYLE!!!
- *
- *****************************************************************************
- * Header file for dgap_trace.c
- *
- */
-
-#ifndef __DGAP_TRACE_H
-#define __DGAP_TRACE_H
-
-#include "dgap_driver.h"
-
-void dgap_tracef(const char *fmt, ...);
-void dgap_tracer_free(void);
-
-#endif
-
projects / deliverable / linux.git / commitdiff
