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/*
* (C) Copyright 2010
* MediaTek <www.MediaTek.com>
*
* MTK GPU Extension Device
*
*/
#include "ged_base.h"
#include <asm/page.h>
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38))
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#endif
#include <linux/uaccess.h>
unsigned long ged_copy_to_user(void __user *pvTo, const void *pvFrom, unsigned long ulBytes)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
if (access_ok(VERIFY_WRITE, pvTo, ulBytes))
{
return __copy_to_user(pvTo, pvFrom, ulBytes);
}
return ulBytes;
#else
return copy_to_user(pvTo, pvFrom, ulBytes);
#endif
}
unsigned long ged_copy_from_user(void *pvTo, const void __user *pvFrom, unsigned long ulBytes)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
if (access_ok(VERIFY_READ, pvFrom, ulBytes))
{
return __copy_from_user(pvTo, pvFrom, ulBytes);
}
return ulBytes;
#else
return copy_from_user(pvTo, pvFrom, ulBytes);
#endif
}
void* ged_alloc(int i32Size)
{
void *pvBuf;
if (i32Size <= PAGE_SIZE)
{
pvBuf = kmalloc(i32Size, GFP_KERNEL);
}
else
{
pvBuf = vmalloc(i32Size);
}
return pvBuf;
}
void ged_free(void* pvBuf, int i32Size)
{
if (pvBuf)
{
if (i32Size <= PAGE_SIZE)
{
kfree(pvBuf);
}
else
{
vfree(pvBuf);
}
}
}
long ged_get_pid(void)
{
if (in_interrupt())
{
return 0xffffffffL;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
return (long)current->pgrp;
#else
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24))
return (long)task_tgid_nr(current);
#else
return (long)current->tgid;
#endif
#endif
}
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