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/*
* sysmgr_ioctl.c
*
* This file implements all the ioctl operations required on the sysmgr
* module.
*
* Copyright (C) 2008-2009 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
/* Standard headers */
#include <linux/types.h>
/* Linux headers */
#include <linux/uaccess.h>
#include <linux/bug.h>
#include <linux/fs.h>
#include <linux/mm.h>
/* Module Headers */
#include <sysmgr.h>
#include <sysmgr_ioctl.h>
#include <platform.h>
/*
* ======== sysmgr_ioctl_setup ========
* Purpose:
* This ioctl interface to sysmgr_setup function
*/
static inline int sysmgr_ioctl_setup(struct sysmgr_cmd_args *cargs)
{
s32 retval = 0;
unsigned long size;
struct sysmgr_config config;
size = copy_from_user(&config, cargs->args.setup.config,
sizeof(struct sysmgr_config));
if (size) {
retval = -EFAULT;
goto exit;
}
cargs->api_status = sysmgr_setup(&config);
exit:
return retval;
}
/*
* ======== sysmgr_ioctl_destroy ========
* Purpose:
* This ioctl interface to sysmgr_destroy function
*/
static inline int sysmgr_ioctl_destroy(struct sysmgr_cmd_args *cargs)
{
cargs->api_status = sysmgr_destroy();
return 0;
}
/*
* ======== sysmgr_ioctl ========
* Purpose:
* ioctl interface function for sysmgr module
*/
int sysmgr_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long args)
{
int os_status = 0;
struct sysmgr_cmd_args __user *uarg =
(struct sysmgr_cmd_args __user *)args;
struct sysmgr_cmd_args cargs;
unsigned long size;
if (_IOC_DIR(cmd) & _IOC_READ)
os_status = !access_ok(VERIFY_WRITE, uarg, _IOC_SIZE(cmd));
else if (_IOC_DIR(cmd) & _IOC_WRITE)
os_status = !access_ok(VERIFY_READ, uarg, _IOC_SIZE(cmd));
if (os_status) {
os_status = -EFAULT;
goto exit;
}
/* Copy the full args from user-side */
size = copy_from_user(&cargs, uarg, sizeof(struct sysmgr_cmd_args));
if (size) {
os_status = -EFAULT;
goto exit;
}
switch (cmd) {
case CMD_SYSMGR_SETUP:
os_status = sysmgr_ioctl_setup(&cargs);
break;
case CMD_SYSMGR_DESTROY:
os_status = sysmgr_ioctl_destroy(&cargs);
break;
case CMD_SYSMGR_LOADCALLBACK:
#if defined CONFIG_SYSLINK_USE_SYSMGR
platform_load_callback((void *)(cargs.args.proc_id));
cargs.api_status = 0;
#endif
break;
case CMD_SYSMGR_STARTCALLBACK:
#if defined CONFIG_SYSLINK_USE_SYSMGR
platform_start_callback((void *)(cargs.args.proc_id));
cargs.api_status = 0;
#endif
break;
case CMD_SYSMGR_STOPCALLBACK:
#if defined CONFIG_SYSLINK_USE_SYSMGR
platform_stop_callback((void *)(cargs.args.proc_id));
cargs.api_status = 0;
#endif
break;
default:
WARN_ON(cmd);
os_status = -ENOTTY;
break;
}
if ((cargs.api_status == -ERESTARTSYS) || (cargs.api_status == -EINTR))
os_status = -ERESTARTSYS;
if (os_status < 0)
goto exit;
/* Copy the full args to the user-side. */
size = copy_to_user(uarg, &cargs, sizeof(struct sysmgr_cmd_args));
if (size) {
os_status = -EFAULT;
goto exit;
}
exit:
return os_status;
}
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