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/*
*
* (C) COPYRIGHT 2012-2013 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_kbase_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 <linux/uaccess.h>
#include <kbase/src/linux/mali_kbase_sync.h>
#include <kbase/mali_base_kernel_sync.h>
static int kbase_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 const struct file_operations stream_fops = {
.owner = THIS_MODULE,
.release = kbase_stream_close,
};
mali_error kbase_stream_create(const char *name, int *const out_fd)
{
struct sync_timeline *tl;
BUG_ON(!out_fd);
tl = kbase_sync_timeline_alloc(name);
if (!tl)
return MALI_ERROR_FUNCTION_FAILED;
*out_fd = anon_inode_getfd(name, &stream_fops, tl, O_RDONLY | O_CLOEXEC);
if (*out_fd < 0) {
sync_timeline_destroy(tl);
return MALI_ERROR_FUNCTION_FAILED;
} else {
return MALI_ERROR_NONE;
}
}
int kbase_stream_create_fence(int tl_fd)
{
struct sync_timeline *tl;
struct sync_pt *pt;
struct sync_fence *fence;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 0)
struct files_struct *files;
struct fdtable *fdt;
#endif
int fd;
struct file *tl_file;
tl_file = fget(tl_fd);
if (tl_file == NULL)
return -EBADF;
if (tl_file->f_op != &stream_fops) {
fd = -EBADF;
goto out;
}
tl = tl_file->private_data;
pt = kbase_sync_pt_alloc(tl);
if (!pt) {
fd = -EFAULT;
goto out;
}
fence = sync_fence_create("mali_fence", pt);
if (!fence) {
sync_pt_free(pt);
fd = -EFAULT;
goto out;
}
/* from here the fence owns the sync_pt */
/* create a fd representing the fence */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 0)
fd = get_unused_fd_flags(O_RDWR | O_CLOEXEC);
if (fd < 0) {
sync_fence_put(fence);
goto out;
}
#else
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);
#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 0) */
/* bind fence to the new fd */
sync_fence_install(fence, fd);
out:
fput(tl_file);
return fd;
}
mali_error kbase_fence_validate(int fd)
{
struct sync_fence *fence;
fence = sync_fence_fdget(fd);
if (NULL != fence) {
sync_fence_put(fence);
return MALI_ERROR_NONE;
} else {
return MALI_ERROR_FUNCTION_FAILED;
}
}
#endif /* CONFIG_SYNC */
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