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Commit 73591341 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/execlists: Detect cross-contamination with GuC 



The process_csb routine from execlists_submission is incompatible with
the GuC backend. Add a warning to detect if we accidentally end up in
the wrong spot.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190618110736.31155-1-chris@chris-wilson.co.uk
parent 44d89409

drivers/gpu/drm/i915/gt/intel_lrc.c

+1 −0
Original line number Diff line number Diff line
@@ -1169,6 +1169,7 @@ static void process_csb(struct intel_engine_cs *engine) 
	u8 head, tail;



	lockdep_assert_held(&engine->active.lock);

	GEM_BUG_ON(USES_GUC_SUBMISSION(engine->i915));



	/*

	 * Note that csb_write, csb_status may be either in HWSP or mmio.