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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.h
*
*/
#ifndef _MALI_SYNC_H_
#define _MALI_SYNC_H_
#ifdef CONFIG_SYNC
#include <linux/seq_file.h>
#include <linux/sync.h>
#define MALI_SYNC_TIMED_FENCE_TIMEOUT 4000 /* 4s */
/*
* Create a stream object.
* Built on top of timeline object.
* Exposed as a file descriptor.
* Life-time controlled via the file descriptor:
* - dup to add a ref
* - close to remove a ref
*/
_mali_osk_errcode_t mali_stream_create(const char * name, int * out_fd);
/*
* Create a fence in a stream object
*/
struct sync_pt *mali_stream_create_point(int tl_fd);
int mali_stream_create_fence(struct sync_pt *pt);
int mali_stream_create_empty_fence(int tl_fd);
int mali_stream_create_signalled_fence(int tl_fd);
/**
* Commit an empty timed fence
*
* This stops the timer of the empty fence and returns wether or not the fence
* is still suitable for use.
*
* Returns -ETIME if fence is already signalled, in which case it can not be
* used, or 0 when the timer was stopped and the fence is OK to use.
*/
int mali_sync_timed_commit(struct sync_pt *pt);
/*
* Validate a fd to be a valid fence
* No reference is taken.
*
* This function is only usable to catch unintentional user errors early,
* it does not stop malicious code changing the fd after this function returns.
*/
_mali_osk_errcode_t mali_fence_validate(int fd);
/* Returns true if the specified timeline is allocated by Mali */
int mali_sync_timeline_is_ours(struct sync_timeline *timeline);
/* Allocates a timeline for Mali
*
* One timeline should be allocated per API context.
*/
struct sync_timeline *mali_sync_timeline_alloc(const char *name);
/* Allocates a sync point within the timeline.
*
* The timeline must be the one allocated by mali_sync_timeline_alloc
*
* Sync points must be triggered in *exactly* the same order as they are allocated.
*/
struct sync_pt *mali_sync_pt_alloc(struct sync_timeline *parent);
/* Allocates a timed sync point within the timeline.
*
* The timeline must be the one allocated by mali_sync_timeline_alloc
*
* Sync points must be triggered in *exactly* the same order as they are allocated.
*
* Timed sync points should be backed by a proper event before reaching the
* timeout. If timeout is reached the fence will be signalled with an error (-ETIME).
*/
struct sync_pt *mali_sync_timed_pt_alloc(struct sync_timeline *parent);
/* Signals a particular sync point
*
* Sync points must be triggered in *exactly* the same order as they are allocated.
*
* If they are signalled in the wrong order then a message will be printed in debug
* builds and otherwise attempts to signal order sync_pts will be ignored.
*/
void mali_sync_signal_pt(struct sync_pt *pt, int error);
#endif /* CONFIG_SYNC */
#endif /* _MALI_SYNC_H_ */
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