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drm/i915: After reset on sanitization, reset the engine backends

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As we reset the GPU on suspend/resume, we also do need to reset the
engine state tracking so call into the engine backends. This is
especially important so that we can also sanitize the state tracking
across resume.

References: https://bugs.freedesktop.org/show_bug.cgi?id=106702
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180531082246.9763-3-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2018-05-31 09:22:45 +01:00
parent 0606035fca
commit c3160da9a6
2 changed files with 29 additions and 3 deletions
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24
drivers/gpu/drm/i915/i915_gem.c
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@@ -4959,7 +4959,22 @@ static void assert_kernel_context_is_current(struct drm_i915_private *i915)
void i915_gem_sanitize(struct drm_i915_private *i915)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
GEM_TRACE("\n");
mutex_lock(&i915->drm.struct_mutex);
intel_runtime_pm_get(i915);
intel_uncore_forcewake_get(i915, FORCEWAKE_ALL);
/*
* As we have just resumed the machine and woken the device up from
* deep PCI sleep (presumably D3_cold), assume the HW has been reset
* back to defaults, recovering from whatever wedged state we left it
* in and so worth trying to use the device once more.
*/
if (i915_terminally_wedged(&i915->gpu_error))
i915_gem_unset_wedged(i915);
@@ -4974,6 +4989,15 @@ void i915_gem_sanitize(struct drm_i915_private *i915)
if (INTEL_GEN(i915) >= 5 && intel_has_gpu_reset(i915))
WARN_ON(intel_gpu_reset(i915, ALL_ENGINES));
/* Reset the submission backend after resume as well as the GPU reset */
for_each_engine(engine, i915, id) {
if (engine->reset.reset)
engine->reset.reset(engine, NULL);
}
intel_uncore_forcewake_put(i915, FORCEWAKE_ALL);
intel_runtime_pm_put(i915);
i915_gem_contexts_lost(i915);
mutex_unlock(&i915->drm.struct_mutex);
}