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#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/time.h>
#include "dbg-trace.h"
#define TRACE_ARR_LEN 800
#define STR_LEN 128
struct trace {
struct timeval tv;
char str[STR_LEN];
unsigned int callback_val1;
unsigned int callback_val2;
char valid;
};
static unsigned int (*trc_callback1) (unsigned char) = NULL;
static unsigned int (*trc_callback2) (unsigned char) = NULL;
static unsigned char trc_param1 = 0;
static unsigned char trc_param2 = 0;
struct trace *trc_arr;
static int trc_index;
static int trc_active = 0;
void TRC_START()
{
trc_active = 1;
}
void TRC_STOP()
{
trc_active = 0;
}
void TRC_INIT(void *callback1, void *callback2, unsigned char callback1_param, unsigned char callback2_param)
{
printk("Marvell debug tracing is on\n");
trc_arr = (struct trace *)kmalloc(TRACE_ARR_LEN*sizeof(struct trace),GFP_KERNEL);
if(trc_arr == NULL)
{
printk("Can't allocate Debug Trace buffer\n");
return;
}
memset(trc_arr,0,TRACE_ARR_LEN*sizeof(struct trace));
trc_index = 0;
trc_callback1 = callback1;
trc_callback2 = callback2;
trc_param1 = callback1_param;
trc_param2 = callback2_param;
}
void TRC_REC(char *fmt,...)
{
va_list args;
struct trace *trc = &trc_arr[trc_index];
if(trc_active == 0)
return;
do_gettimeofday(&trc->tv);
if(trc_callback1)
trc->callback_val1 = trc_callback1(trc_param1);
if(trc_callback2)
trc->callback_val2 = trc_callback2(trc_param2);
va_start(args, fmt);
vsprintf(trc->str,fmt,args);
va_end(args);
trc->valid = 1;
if((++trc_index) == TRACE_ARR_LEN) {
trc_index = 0;
}
}
void TRC_OUTPUT(void)
{
int i,j;
struct trace *p;
printk("\n\nTrace %d items\n",TRACE_ARR_LEN);
for(i=0,j=trc_index; i<TRACE_ARR_LEN; i++,j++) {
if(j == TRACE_ARR_LEN)
j = 0;
p = &trc_arr[j];
if(p->valid) {
unsigned long uoffs;
struct trace *plast;
if(p == &trc_arr[0])
plast = &trc_arr[TRACE_ARR_LEN-1];
else
plast = p-1;
if(p->tv.tv_sec == ((plast)->tv.tv_sec))
uoffs = (p->tv.tv_usec - ((plast)->tv.tv_usec));
else
uoffs = (1000000 - ((plast)->tv.tv_usec)) +
((p->tv.tv_sec - ((plast)->tv.tv_sec) - 1) * 1000000) +
p->tv.tv_usec;
printk("%03d: [+%ld usec]", j, (unsigned long)uoffs);
if(trc_callback1)
printk("[%u]",p->callback_val1);
if(trc_callback2)
printk("[%u]",p->callback_val2);
printk(": %s",p->str);
}
p->valid = 0;
}
memset(trc_arr,0,TRACE_ARR_LEN*sizeof(struct trace));
trc_index = 0;
}
void TRC_RELEASE(void)
{
kfree(trc_arr);
trc_index = 0;
}
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