62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
|
/* 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)
|
||
|
|
{
|
||
|
|
struct intel_engine_execlists_stats *stats = &engine->stats.execlists;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
if (stats->active) {
|
||
|
|
stats->active++;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* The writer is serialised; but the pmu reader may be from hardirq */
|
||
|
|
local_irq_save(flags);
|
||
|
|
write_seqcount_begin(&stats->lock);
|
||
|
|
|
||
|
|
stats->start = ktime_get();
|
||
|
|
stats->active++;
|
||
|
|
|
||
|
|
write_seqcount_end(&stats->lock);
|
||
|
|
local_irq_restore(flags);
|
||
|
|
|
||
|
|
GEM_BUG_ON(!stats->active);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void intel_engine_context_out(struct intel_engine_cs *engine)
|
||
|
|
{
|
||
|
|
struct intel_engine_execlists_stats *stats = &engine->stats.execlists;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
GEM_BUG_ON(!stats->active);
|
||
|
|
if (stats->active > 1) {
|
||
|
|
stats->active--;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
local_irq_save(flags);
|
||
|
|
write_seqcount_begin(&stats->lock);
|
||
|
|
|
||
|
|
stats->active--;
|
||
|
|
stats->total = ktime_add(stats->total,
|
||
|
|
ktime_sub(ktime_get(), stats->start));
|
||
|
|
|
||
|
|
write_seqcount_end(&stats->lock);
|
||
|
|
local_irq_restore(flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* __INTEL_ENGINE_STATS_H__ */
|