62 lines
1.3 KiB
C
62 lines
1.3 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Intel Corporation
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*/
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#ifndef __INTEL_ENGINE_STATS_H__
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#define __INTEL_ENGINE_STATS_H__
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#include <linux/atomic.h>
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#include <linux/ktime.h>
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#include <linux/seqlock.h>
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#include "i915_gem.h" /* GEM_BUG_ON */
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#include "intel_engine.h"
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static inline void intel_engine_context_in(struct intel_engine_cs *engine)
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{
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struct intel_engine_execlists_stats *stats = &engine->stats.execlists;
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unsigned long flags;
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if (stats->active) {
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stats->active++;
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return;
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}
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/* The writer is serialised; but the pmu reader may be from hardirq */
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local_irq_save(flags);
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write_seqcount_begin(&stats->lock);
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stats->start = ktime_get();
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stats->active++;
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write_seqcount_end(&stats->lock);
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local_irq_restore(flags);
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GEM_BUG_ON(!stats->active);
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}
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static inline void intel_engine_context_out(struct intel_engine_cs *engine)
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{
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struct intel_engine_execlists_stats *stats = &engine->stats.execlists;
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unsigned long flags;
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GEM_BUG_ON(!stats->active);
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if (stats->active > 1) {
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stats->active--;
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return;
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}
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local_irq_save(flags);
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write_seqcount_begin(&stats->lock);
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stats->active--;
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stats->total = ktime_add(stats->total,
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ktime_sub(ktime_get(), stats->start));
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write_seqcount_end(&stats->lock);
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local_irq_restore(flags);
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}
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#endif /* __INTEL_ENGINE_STATS_H__ */
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