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freebsd/sys/dev/ofw/openfirmio.c
Poul-Henning Kamp 7ac40f5f59 Gigacommit to improve device-driver source compatibility between
branches:

Initialize struct cdevsw using C99 sparse initializtion and remove
all initializations to default values.

This patch is automatically generated and has been tested by compiling
LINT with all the fields in struct cdevsw in reverse order on alpha,
sparc64 and i386.

Approved by:    re(scottl)
2003-03-03 12:15:54 +00:00

300 lines
7.3 KiB
C

/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)openfirm.c 8.1 (Berkeley) 6/11/93
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/fcntl.h>
#include <sys/ioccom.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <dev/ofw/openfirmio.h>
static dev_t openfirm_dev;
static d_ioctl_t openfirm_ioctl;
#define CDEV_MAJOR 177
#define OPENFIRM_MINOR 0
static struct cdevsw openfirm_cdevsw = {
.d_open = nullopen,
.d_close = nullclose,
.d_ioctl = openfirm_ioctl,
.d_name = "openfirm",
.d_maj = CDEV_MAJOR,
};
static phandle_t lastnode; /* speed hack */
static int openfirm_checkid(phandle_t, phandle_t);
static int openfirm_getstr(int, const char *, char **);
/* Maximum accepted name length. */
#define OFW_NAME_MAX 8191
/*
* Verify target ID is valid (exists in the OPENPROM tree), as
* listed from node ID sid forward.
*/
static int
openfirm_checkid(phandle_t sid, phandle_t tid)
{
for (; sid != 0; sid = OF_peer(sid))
if (sid == tid || openfirm_checkid(OF_child(sid), tid))
return (1);
return (0);
}
static int
openfirm_getstr(int len, const char *user, char **cpp)
{
int error;
char *cp;
/* Reject obvious bogus requests */
if ((u_int)len > OFW_NAME_MAX)
return (ENAMETOOLONG);
*cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
if (cp == NULL)
return (ENOMEM);
error = copyin(user, cp, len);
cp[len] = '\0';
return (error);
}
int
openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
struct thread *td)
{
struct ofiocdesc *of;
phandle_t node;
int len, ok, error;
char *name, *value;
char newname[32];
of = (struct ofiocdesc *)data;
switch (cmd) {
case OFIOCGETOPTNODE:
*(phandle_t *) data = OF_finddevice("/options");
return (0);
case OFIOCGET:
#if 0
case OFIOCSET:
#endif
case OFIOCNEXTPROP:
case OFIOCFINDDEVICE:
node = of->of_nodeid;
break;
case OFIOCGETNEXT:
case OFIOCGETCHILD:
node = *(phandle_t *)data;
break;
default:
return (ENOTTY);
}
if (node != 0 && node != lastnode) {
/* Not an easy one, must search for it */
ok = openfirm_checkid(OF_peer(0), node);
if (!ok)
return (EINVAL);
lastnode = node;
}
name = value = NULL;
error = 0;
switch (cmd) {
case OFIOCGET:
if ((flags & FREAD) == 0)
return (EBADF);
if (node == 0)
return (EINVAL);
error = openfirm_getstr(of->of_namelen, of->of_name, &name);
if (error)
break;
len = OF_getproplen(node, name);
if (len > of->of_buflen) {
error = ENOMEM;
break;
}
of->of_buflen = len;
/* -1 means no entry; 0 means no value */
if (len <= 0)
break;
value = malloc(len, M_TEMP, M_WAITOK);
if (value == NULL) {
error = ENOMEM;
break;
}
len = OF_getprop(node, name, (void *)value, len);
error = copyout(value, of->of_buf, len);
break;
#if 0
case OFIOCSET:
if ((flags & FWRITE) == 0)
return (EBADF);
if (node == 0)
return (EINVAL);
error = openfirm_getstr(of->of_namelen, of->of_name, &name);
if (error)
break;
error = openfirm_getstr(of->of_buflen, of->of_buf, &value);
if (error)
break;
len = OF_setprop(node, name, value, of->of_buflen);
if (len != of->of_buflen)
error = EINVAL;
break;
#endif
case OFIOCNEXTPROP:
if ((flags & FREAD) == 0)
return (EBADF);
if (node == 0 || of->of_buflen < 0)
return (EINVAL);
if (of->of_namelen != 0) {
error = openfirm_getstr(of->of_namelen, of->of_name,
&name);
if (error)
break;
}
ok = OF_nextprop(node, name, newname);
if (ok == 0) {
error = ENOENT;
break;
}
if (ok == -1) {
error = EINVAL;
break;
}
len = strlen(newname) + 1;
if (len > of->of_buflen)
len = of->of_buflen;
else
of->of_buflen = len;
error = copyout(newname, of->of_buf, len);
break;
case OFIOCGETNEXT:
if ((flags & FREAD) == 0)
return (EBADF);
node = OF_peer(node);
*(phandle_t *)data = lastnode = node;
break;
case OFIOCGETCHILD:
if ((flags & FREAD) == 0)
return (EBADF);
if (node == 0)
return (EINVAL);
node = OF_child(node);
*(phandle_t *)data = lastnode = node;
break;
case OFIOCFINDDEVICE:
if ((flags & FREAD) == 0)
return (EBADF);
error = openfirm_getstr(of->of_namelen, of->of_name, &name);
if (error)
break;
node = OF_finddevice(name);
if (node == 0 || node == -1) {
error = ENOENT;
break;
}
of->of_nodeid = lastnode = node;
break;
}
if (name != NULL)
free(name, M_TEMP);
if (value != NULL)
free(value, M_TEMP);
return (error);
}
static int
openfirm_modevent(module_t mod, int type, void *data)
{
switch(type) {
case MOD_LOAD:
if (bootverbose)
printf("openfirm: <OpenFirmware control device>\n");
/*
* Allow only root access by default; this device may allow
* users to peek into firmware passwords, and likely to crash
* the machine on some boxen due to firmware quirks.
*/
openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR,
UID_ROOT, GID_WHEEL, 0600, "openfirm");
return 0;
case MOD_UNLOAD:
destroy_dev(openfirm_dev);
return 0;
case MOD_SHUTDOWN:
return 0;
default:
return EOPNOTSUPP;
}
}
DEV_MODULE(openfirm, openfirm_modevent, NULL);