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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
*
* (C) COPYRIGHT 2019-2022 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 license.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, you can access it online at
* http://www.gnu.org/licenses/gpl-2.0.html.
*
*/
#if !defined(_KBASE_TIMELINE_PRIV_H)
#define _KBASE_TIMELINE_PRIV_H
#include <mali_kbase.h>
#include "mali_kbase_tlstream.h"
#if MALI_USE_CSF
#include "csf/mali_kbase_csf_tl_reader.h"
#include "csf/mali_kbase_csf_trace_buffer.h"
#endif
#include <linux/timer.h>
#include <linux/atomic.h>
#include <linux/mutex.h>
/* The minimum amount of time timeline must be acquired for before release is
* allowed, to prevent DoS attacks.
*/
#define TIMELINE_HYSTERESIS_TIMEOUT_MS ((s64)500)
/**
* struct kbase_timeline - timeline state structure
* @streams: The timeline streams generated by kernel
* @tl_kctx_list: List of contexts for timeline.
* @tl_kctx_list_lock: Lock to protect @tl_kctx_list.
* @autoflush_timer: Autoflush timer
* @autoflush_timer_active: If non-zero autoflush timer is active
* @reader_lock: Reader lock. Only one reader is allowed to
* have access to the timeline streams at any given time.
* @event_queue: Timeline stream event queue
* @bytes_collected: Number of bytes read by user
* @timeline_flags: Zero, if timeline is disabled. Timeline stream flags
* otherwise. See kbase_timeline_acquire().
* @obj_header_btc: Remaining bytes to copy for the object stream header
* @aux_header_btc: Remaining bytes to copy for the aux stream header
* @last_acquire_time: The time at which timeline was last acquired.
* @csf_tl_reader: CSFFW timeline reader
*/
struct kbase_timeline {
struct kbase_tlstream streams[TL_STREAM_TYPE_COUNT];
struct list_head tl_kctx_list;
struct mutex tl_kctx_list_lock;
struct timer_list autoflush_timer;
atomic_t autoflush_timer_active;
struct mutex reader_lock;
wait_queue_head_t event_queue;
#if MALI_UNIT_TEST
atomic_t bytes_collected;
#endif /* MALI_UNIT_TEST */
atomic_t *timeline_flags;
size_t obj_header_btc;
size_t aux_header_btc;
ktime_t last_acquire_time;
#if MALI_USE_CSF
struct kbase_csf_tl_reader csf_tl_reader;
#endif
};
void kbase_create_timeline_objects(struct kbase_device *kbdev);
/**
* kbase_timeline_acquire - acquire timeline for a userspace client.
* @kbdev: An instance of the GPU platform device, allocated from the probe
* method of the driver.
* @flags: Timeline stream flags
*
* Each timeline instance can be acquired by only one userspace client at a time.
*
* Return: Zero on success, error number on failure (e.g. if already acquired).
*/
int kbase_timeline_acquire(struct kbase_device *kbdev, u32 flags);
/**
* kbase_timeline_release - release timeline for a userspace client.
* @timeline: Timeline instance to be stopped. It must be previously acquired
* with kbase_timeline_acquire().
*
* Releasing the timeline instance allows it to be acquired by another userspace client.
*/
void kbase_timeline_release(struct kbase_timeline *timeline);
#endif /* _KBASE_TIMELINE_PRIV_H */
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