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/*-
* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
* 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 ``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/types.h>
#include <sys/ioctl.h>
#include <dev/ofw/openfirmio.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "pathnames.h"
#include "ofw_util.h"
#define OFW_IOCTL(fd, cmd, val) do { \
if (ioctl(fd, cmd, val) == -1) \
err(EX_IOERR, "ioctl(..., " #cmd ", ...) failed"); \
} while (0)
int
ofw_open(int mode)
{
int fd;
if ((fd = open(PATH_DEV_OPENFIRM, mode)) == -1)
err(EX_UNAVAILABLE, "could not open " PATH_DEV_OPENFIRM);
return (fd);
}
void
ofw_close(int fd)
{
close(fd);
}
phandle_t
ofw_root(int fd)
{
return (ofw_peer(fd, 0));
}
phandle_t
ofw_optnode(int fd)
{
phandle_t rv;
OFW_IOCTL(fd, OFIOCGETOPTNODE, &rv);
return (rv);
}
phandle_t
ofw_peer(int fd, phandle_t node)
{
phandle_t rv;
rv = node;
OFW_IOCTL(fd, OFIOCGETNEXT, &rv);
return (rv);
}
phandle_t
ofw_child(int fd, phandle_t node)
{
phandle_t rv;
rv = node;
OFW_IOCTL(fd, OFIOCGETCHILD, &rv);
return (rv);
}
phandle_t
ofw_finddevice(int fd, const char *name)
{
struct ofiocdesc d;
d.of_nodeid = 0;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = 0;
d.of_buf = NULL;
if (ioctl(fd, OFIOCFINDDEVICE, &d) == -1) {
if (errno == ENOENT)
err(EX_UNAVAILABLE, "Node '%s' not found", name);
else
err(EX_IOERR,
"ioctl(..., OFIOCFINDDEVICE, ...) failed");
}
return (d.of_nodeid);
}
int
ofw_firstprop(int fd, phandle_t node, char *buf, int buflen)
{
return (ofw_nextprop(fd, node, NULL, buf, buflen));
}
int
ofw_nextprop(int fd, phandle_t node, const char *prev, char *buf, int buflen)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = prev != NULL ? strlen(prev) : 0;
d.of_name = prev;
d.of_buflen = buflen;
d.of_buf = buf;
if (ioctl(fd, OFIOCNEXTPROP, &d) == -1) {
if (errno == ENOENT)
return (0);
else
err(EX_IOERR, "ioctl(..., OFIOCNEXTPROP, ...) failed");
}
return (d.of_buflen);
}
static void *
ofw_malloc(int size)
{
void *p;
if ((p = malloc(size)) == NULL)
err(EX_OSERR, "malloc() failed");
return (p);
}
int
ofw_getprop(int fd, phandle_t node, const char *name, void *buf, int buflen)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = buflen;
d.of_buf = buf;
OFW_IOCTL(fd, OFIOCGET, &d);
return (d.of_buflen);
}
int
ofw_setprop(int fd, phandle_t node, const char *name, const void *buf,
int buflen)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = buflen;
d.of_buf = ofw_malloc(buflen);
memcpy(d.of_buf, buf, buflen);
OFW_IOCTL(fd, OFIOCSET, &d);
free(d.of_buf);
return (d.of_buflen);
}
int
ofw_getproplen(int fd, phandle_t node, const char *name)
{
struct ofiocdesc d;
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
OFW_IOCTL(fd, OFIOCGETPROPLEN, &d);
return (d.of_buflen);
}
int
ofw_getprop_alloc(int fd, phandle_t node, const char *name, void **buf,
int *buflen, int reserve)
{
struct ofiocdesc d;
int len, rv;
do {
len = ofw_getproplen(fd, node, name);
if (len < 0)
return (len);
if (*buflen < len + reserve) {
if (*buf != NULL)
free(*buf);
*buflen = len + reserve + OFIOCMAXVALUE;
*buf = ofw_malloc(*buflen);
}
d.of_nodeid = node;
d.of_namelen = strlen(name);
d.of_name = name;
d.of_buflen = *buflen - reserve;
d.of_buf = *buf;
rv = ioctl(fd, OFIOCGET, &d);
} while (rv == -1 && errno == ENOMEM);
if (rv == -1)
err(EX_IOERR, "ioctl(..., OFIOCGET, ...) failed");
return (d.of_buflen);
}
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