@@ -1804,7 +1804,6 @@ static bool unexpected_starting_state(struct intel_engine_cs *engine)
static int gen8_init_common_ring(struct intel_engine_cs *engine)
{
- struct intel_engine_execlists * const execlists = &engine->execlists;
int ret;
ret = intel_mocs_init_engine(engine);
@@ -1822,10 +1821,6 @@ static int gen8_init_common_ring(struct intel_engine_cs *engine)
enable_execlists(engine);
- /* After a GPU reset, we may have requests to replay */
- if (execlists->first)
- tasklet_schedule(&execlists->tasklet);
-
return 0;
}
@@ -2007,6 +2002,12 @@ static void execlists_reset(struct intel_engine_cs *engine,
static void execlists_reset_finish(struct intel_engine_cs *engine)
{
+ struct intel_engine_execlists * const execlists = &engine->execlists;
+
+ /* After a GPU reset, we may have requests to replay */
+ if (execlists->first)
+ tasklet_schedule(&execlists->tasklet);
+
/*
* Flush the tasklet while we still have the forcewake to be sure
* that it is not allowed to sleep before we restart and reload a
@@ -2016,7 +2017,7 @@ static void execlists_reset_finish(struct intel_engine_cs *engine)
* serialising multiple attempts to reset so that we know that we
* are the only one manipulating tasklet state.
*/
- __tasklet_enable_sync_once(&engine->execlists.tasklet);
+ __tasklet_enable_sync_once(&execlists->tasklet);
GEM_TRACE("%s\n", engine->name);
}
In the unlikely case where we have failed to keep submitting to the GPU, we end up with the ELSP queue empty but a pending queue of requests. Here, we skip the per-engine reset as there is no guilty request, but in doing so we also skip the engine restart leaving ourselves with a permanently hung engine. A quick way to recover is by moving the tasklet kick to execlists_reset_finish() (from init_hw). We still emit the error on hanging, so the error is not lost but we should be able to recover. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Michel Thierry <michel.thierry@intel.com> --- drivers/gpu/drm/i915/intel_lrc.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)