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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: Chris 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: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190618110736.31155-1-chris@chris-wilson.co.uk
alistair/sunxi64-5.4-dsi
Chris Wilson 2019-06-18 12:07:36 +01:00
parent 44d89409a1
commit 7359134101
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/gt/intel_lrc.c
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@ -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.