[PATCH 33/33] preempt-timeout
Chris Wilson
chris at chris-wilson.co.uk
Sun May 19 12:36:04 UTC 2019
---
drivers/gpu/drm/i915/gt/intel_engine_types.h | 2 ++
drivers/gpu/drm/i915/gt/intel_lrc.c | 34 +++++++++++++++++++-
2 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index 7f093f4b0af0..57125e6f7076 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -190,6 +190,8 @@ struct intel_engine_execlists {
*/
int queue_priority_hint;
+ ktime_t last_submit;
+
/**
* @queue: queue of requests, in priority lists
*/
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 109b32c6aead..4a7bae554acf 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1218,6 +1218,10 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
*port = execlists_schedule_in(last, port - execlists->pending);
memset(port + 1, 0, (last_port - port) * sizeof(*port));
execlists_submit_ports(engine);
+
+ execlists->last_submit = ktime_get();
+ mod_timer(&execlists->timer,
+ jiffies + msecs_to_jiffies_timeout(10));
}
}
@@ -1373,13 +1377,41 @@ static void process_csb(struct intel_engine_cs *engine)
invalidate_csb_entries(&buf[0], &buf[num_entries - 1]);
}
+static void preempt_reset(struct intel_engine_cs *engine)
+{
+ const unsigned int bit = I915_RESET_ENGINE + engine->id;
+ unsigned long *lock = &engine->i915->gpu_error.flags;
+ unsigned long flags;
+
+ if (test_and_set_bit(bit, lock))
+ return;
+
+ tasklet_disable_nosync(&engine->execlists.tasklet);
+ spin_unlock(&engine->active.lock);
+
+ i915_reset_engine(engine, "preemption timed out");
+
+ spin_lock_irqsave(&engine->active.lock, flags);
+ tasklet_enable(&engine->execlists.tasklet);
+
+ clear_bit(bit, lock);
+ wake_up_bit(lock, bit);
+}
+
static void __execlists_submission_tasklet(struct intel_engine_cs *const engine)
{
lockdep_assert_held(&engine->active.lock);
process_csb(engine);
- if (!engine->execlists.pending[0])
+ if (!engine->execlists.pending[0]) {
execlists_dequeue(engine);
+ return;
+ }
+
+ if (intel_engine_has_preemption(engine) &&
+ ktime_after(ktime_get(),
+ engine->execlists.last_submit + 10*1000*1000))
+ preempt_reset(engine);
}
/*
--
2.20.1
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