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/*
* Copyright (C) 2012 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained from Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* @file mali_sync_user.c
*
*/
#ifdef CONFIG_SYNC
#include <linux/sched.h>
#include <linux/fdtable.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/anon_inodes.h>
#include <linux/version.h>
#include <asm/uaccess.h>
#include "mali_osk.h"
#include "mali_kernel_common.h"
#include "mali_sync.h"
static int mali_stream_close(struct inode * inode, struct file * file)
{
struct sync_timeline * tl;
tl = (struct sync_timeline*)file->private_data;
BUG_ON(!tl);
sync_timeline_destroy(tl);
return 0;
}
static struct file_operations stream_fops =
{
.owner = THIS_MODULE,
.release = mali_stream_close,
};
_mali_osk_errcode_t mali_stream_create(const char * name, int *out_fd)
{
struct sync_timeline * tl;
BUG_ON(!out_fd);
tl = mali_sync_timeline_alloc(name);
if (!tl)
{
return _MALI_OSK_ERR_FAULT;
}
*out_fd = anon_inode_getfd(name, &stream_fops, tl, O_RDONLY | O_CLOEXEC);
if (*out_fd < 0)
{
sync_timeline_destroy(tl);
return _MALI_OSK_ERR_FAULT;
}
else
{
return _MALI_OSK_ERR_OK;
}
}
static mali_sync_pt *mali_stream_create_point_internal(int tl_fd, mali_bool timed)
{
struct sync_timeline *tl;
struct sync_pt * pt;
struct file *tl_file;
tl_file = fget(tl_fd);
if (tl_file == NULL)
return NULL;
if (tl_file->f_op != &stream_fops)
{
pt = NULL;
goto out;
}
tl = tl_file->private_data;
if (unlikely(timed))
{
pt = mali_sync_timed_pt_alloc(tl);
}
else
{
pt = mali_sync_pt_alloc(tl);
}
if (!pt)
{
pt = NULL;
goto out;
}
out:
fput(tl_file);
return pt;
}
mali_sync_pt *mali_stream_create_point(int tl_fd)
{
return mali_stream_create_point_internal(tl_fd, MALI_FALSE);
}
int mali_stream_create_fence(mali_sync_pt *pt)
{
struct sync_fence *fence;
struct fdtable * fdt;
struct files_struct * files;
int fd = -1;
fence = sync_fence_create("mali_fence", pt);
if (!fence)
{
sync_pt_free(pt);
fd = -EFAULT;
goto out;
}
/* create a fd representing the fence */
fd = get_unused_fd();
if (fd < 0)
{
sync_fence_put(fence);
goto out;
}
files = current->files;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,4,0)
__set_close_on_exec(fd, fdt);
#else
FD_SET(fd, fdt->close_on_exec);
#endif
spin_unlock(&files->file_lock);
/* bind fence to the new fd */
sync_fence_install(fence, fd);
out:
return fd;
}
int mali_stream_create_empty_fence(int tl_fd)
{
int fd;
mali_sync_pt *pt;
pt = mali_stream_create_point_internal(tl_fd, MALI_TRUE);
if (NULL == pt) return -ENOMEM;
fd = mali_stream_create_fence(pt);
return fd;
}
_mali_osk_errcode_t mali_fence_validate(int fd)
{
struct sync_fence * fence;
fence = sync_fence_fdget(fd);
if (NULL != fence)
{
sync_fence_put(fence);
return _MALI_OSK_ERR_OK;
}
else
{
return _MALI_OSK_ERR_FAULT;
}
}
#endif /* CONFIG_SYNC */
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