freebsd-dev/sys/dev/nand/nandsim_log.c

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/*-
* Copyright (C) 2009-2012 Semihalf
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/alq.h>
#include <sys/time.h>
#include <machine/stdarg.h>
#include <dev/nand/nandsim_log.h>
int nandsim_log_level;
int nandsim_log_output;
int log_size = NANDSIM_RAM_LOG_SIZE;
static int nandsim_entry_size = NANDSIM_ENTRY_SIZE;
static int nandsim_entry_count = NANDSIM_ENTRY_COUNT;
static int str_index = 0;
static char string[NANDSIM_ENTRY_SIZE + 1] = {0};
int
nandsim_log_init(struct nandsim_softc *sc, char *filename)
{
int error = 0;
if (nandsim_log_output == NANDSIM_OUTPUT_FILE) {
error = alq_open(&sc->alq, filename,
curthread->td_ucred, 0644,
nandsim_entry_size, nandsim_entry_count);
} else if (nandsim_log_output == NANDSIM_OUTPUT_RAM) {
sc->log_buff = malloc(log_size, M_NANDSIM, M_WAITOK | M_ZERO);
if (!sc->log_buff)
error = ENOMEM;
}
return (error);
}
void
nandsim_log_close(struct nandsim_softc *sc)
{
if (nandsim_log_output == NANDSIM_OUTPUT_FILE) {
memset(&string[str_index], 0, NANDSIM_ENTRY_SIZE - str_index);
alq_write(sc->alq, (void *) string, ALQ_NOWAIT);
str_index = 0;
string[0] = '\0';
alq_close(sc->alq);
} else if (nandsim_log_output == NANDSIM_OUTPUT_RAM) {
free(sc->log_buff, M_NANDSIM);
sc->log_buff = NULL;
}
}
void
nandsim_log(struct nandsim_chip *chip, int level, const char *fmt, ...)
{
char hdr[TIME_STR_SIZE];
char tmp[NANDSIM_ENTRY_SIZE];
struct nandsim_softc *sc;
struct timeval currtime;
va_list ap;
int hdr_len, len, rest;
if (nandsim_log_output == NANDSIM_OUTPUT_NONE)
return;
if (chip == NULL)
return;
sc = chip->sc;
if (!sc->alq && nandsim_log_output == NANDSIM_OUTPUT_FILE)
return;
if (level <= nandsim_log_level) {
microtime(&currtime);
hdr_len = sprintf(hdr, "%08jd.%08li [chip:%d, ctrl:%d]: ",
(intmax_t)currtime.tv_sec, currtime.tv_usec,
chip->chip_num, chip->ctrl_num);
switch(nandsim_log_output) {
case NANDSIM_OUTPUT_CONSOLE:
printf("%s", hdr);
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
break;
case NANDSIM_OUTPUT_RAM:
va_start(ap, fmt);
len = vsnprintf(tmp, NANDSIM_ENTRY_SIZE - 1, fmt, ap);
tmp[NANDSIM_ENTRY_SIZE - 1] = 0;
va_end(ap);
rest = log_size - sc->log_idx - 1;
if (rest >= hdr_len) {
bcopy(hdr, &sc->log_buff[sc->log_idx],
hdr_len);
sc->log_idx += hdr_len;
sc->log_buff[sc->log_idx] = 0;
} else {
bcopy(hdr, &sc->log_buff[sc->log_idx], rest);
bcopy(&hdr[rest], sc->log_buff,
hdr_len - rest);
sc->log_idx = hdr_len - rest;
sc->log_buff[sc->log_idx] = 0;
}
rest = log_size - sc->log_idx - 1;
if (rest >= len) {
bcopy(tmp, &sc->log_buff[sc->log_idx], len);
sc->log_idx += len;
sc->log_buff[sc->log_idx] = 0;
} else {
bcopy(tmp, &sc->log_buff[sc->log_idx], rest);
bcopy(&tmp[rest], sc->log_buff, len - rest);
sc->log_idx = len - rest;
sc->log_buff[sc->log_idx] = 0;
}
break;
case NANDSIM_OUTPUT_FILE:
va_start(ap, fmt);
len = vsnprintf(tmp, NANDSIM_ENTRY_SIZE - 1, fmt, ap);
tmp[NANDSIM_ENTRY_SIZE - 1] = 0;
va_end(ap);
rest = NANDSIM_ENTRY_SIZE - str_index;
if (rest >= hdr_len) {
strcat(string, hdr);
str_index += hdr_len;
} else {
strlcat(string, hdr, NANDSIM_ENTRY_SIZE + 1);
alq_write(sc->alq, (void *) string,
ALQ_NOWAIT);
strcpy(string, &hdr[rest]);
str_index = hdr_len - rest;
}
rest = NANDSIM_ENTRY_SIZE - str_index;
if (rest >= len) {
strcat(string, tmp);
str_index += len;
} else {
strlcat(string, tmp, NANDSIM_ENTRY_SIZE + 1);
alq_write(sc->alq, (void *) string,
ALQ_NOWAIT);
strcpy(string, &tmp[rest]);
str_index = len - rest;
}
break;
default:
break;
}
}
}