[linux-2.6-block.git] / drivers / gpu / drm / i915 / gt / intel_engine_stats.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright © 2020 Intel Corporation
 */

#ifndef __INTEL_ENGINE_STATS_H__
#define __INTEL_ENGINE_STATS_H__

#include <linux/atomic.h>
#include <linux/ktime.h>
#include <linux/seqlock.h>

#include "i915_gem.h" /* GEM_BUG_ON */
#include "intel_engine.h"

static inline void intel_engine_context_in(struct intel_engine_cs *engine)
{
	unsigned long flags;

	if (engine->stats.active) {
		engine->stats.active++;
		return;
	}

	/* The writer is serialised; but the pmu reader may be from hardirq */
	local_irq_save(flags);
	write_seqcount_begin(&engine->stats.lock);

	engine->stats.start = ktime_get();
	engine->stats.active++;

	write_seqcount_end(&engine->stats.lock);
	local_irq_restore(flags);

	GEM_BUG_ON(!engine->stats.active);
}

static inline void intel_engine_context_out(struct intel_engine_cs *engine)
{
	unsigned long flags;

	GEM_BUG_ON(!engine->stats.active);
	if (engine->stats.active > 1) {
		engine->stats.active--;
		return;
	}

	local_irq_save(flags);
	write_seqcount_begin(&engine->stats.lock);

	engine->stats.active--;
	engine->stats.total =
		ktime_add(engine->stats.total,
			  ktime_sub(ktime_get(), engine->stats.start));

	write_seqcount_end(&engine->stats.lock);
	local_irq_restore(flags);
}

#endif /* __INTEL_ENGINE_STATS_H__ */
Commit	Line	Data
4fb05a39 CW	1	/* SPDX-License-Identifier: MIT */
	2	/*
	3	* Copyright © 2020 Intel Corporation
	4	*/
	5
	6	#ifndef __INTEL_ENGINE_STATS_H__
	7	#define __INTEL_ENGINE_STATS_H__
	8
	9	#include <linux/atomic.h>
	10	#include <linux/ktime.h>
	11	#include <linux/seqlock.h>
	12
	13	#include "i915_gem.h" /* GEM_BUG_ON */
	14	#include "intel_engine.h"
	15
	16	static inline void intel_engine_context_in(struct intel_engine_cs *engine)
	17	{
	18	unsigned long flags;
	19
f530a41d CW	20	if (engine->stats.active) {
f530a41d CW	21	engine->stats.active++;
4fb05a39	22	return;
4fb05a39	23	}
f530a41d CW	24
	25	/* The writer is serialised; but the pmu reader may be from hardirq */
	26	local_irq_save(flags);
	27	write_seqcount_begin(&engine->stats.lock);
	28
	29	engine->stats.start = ktime_get();
	30	engine->stats.active++;
	31
	32	write_seqcount_end(&engine->stats.lock);
	33	local_irq_restore(flags);
	34
	35	GEM_BUG_ON(!engine->stats.active);
4fb05a39 CW	36	}
	37
	38	static inline void intel_engine_context_out(struct intel_engine_cs *engine)
	39	{
	40	unsigned long flags;
	41
f530a41d CW	42	GEM_BUG_ON(!engine->stats.active);
	43	if (engine->stats.active > 1) {
	44	engine->stats.active--;
4fb05a39	45	return;
4fb05a39	46	}
f530a41d CW	47
	48	local_irq_save(flags);
	49	write_seqcount_begin(&engine->stats.lock);
	50
	51	engine->stats.active--;
	52	engine->stats.total =
	53	ktime_add(engine->stats.total,
	54	ktime_sub(ktime_get(), engine->stats.start));
	55
	56	write_seqcount_end(&engine->stats.lock);
	57	local_irq_restore(flags);
4fb05a39 CW	58	}
	59
	60	#endif /* __INTEL_ENGINE_STATS_H__ */