drm/i915: Split GEM resetting into 3 phases
Currently we do a reset prepare/finish around the call to reset the GPU,
but it looks like we need a later stage after the hw has been
reinitialised to allow GEM to restart itself. Start by splitting the 2
GEM phases into 3:
prepare - before the reset, check if GEM recovered, then stop GEM
reset - after the reset, update GEM bookkeeping
finish - after the re-initialisation following the reset, restart GEM
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170208143033.11651-2-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 8525196..e812993 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2758,7 +2758,7 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine)
engine->reset_hw(engine, request);
}
-void i915_gem_reset_finish(struct drm_i915_private *dev_priv)
+void i915_gem_reset(struct drm_i915_private *dev_priv)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
@@ -2780,6 +2780,11 @@ void i915_gem_reset_finish(struct drm_i915_private *dev_priv)
}
}
+void i915_gem_reset_finish(struct drm_i915_private *dev_priv)
+{
+ lockdep_assert_held(&dev_priv->drm.struct_mutex);
+}
+
static void nop_submit_request(struct drm_i915_gem_request *request)
{
dma_fence_set_error(&request->fence, -EIO);