After declaring a terminally wedged device, we allow ourselves to
recover on the next GPU reset (manually triggered), or resume. Check
that resetting a wedged device does work.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuopp...@linux.intel.com>
---
.../gpu/drm/i915/selftests/intel_hangcheck.c | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
index 805e40aff407..65c318d14077 100644
--- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
@@ -385,6 +385,28 @@ static int igt_global_reset(void *arg)
return err;
}
+static int igt_wedged_reset(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+
+ /* Check that we can recover a wedged device with a GPU reset */
+
+ igt_global_reset_lock(i915);
+ mutex_lock(&i915->drm.struct_mutex);
+
+ i915_gem_set_wedged(i915);
+ GEM_BUG_ON(!i915_terminally_wedged(&i915->gpu_error));
+
+ set_bit(I915_RESET_HANDOFF, &i915->gpu_error.flags);
+ i915_reset(i915, ALL_ENGINES, NULL);
+ GEM_BUG_ON(test_bit(I915_RESET_HANDOFF, &i915->gpu_error.flags));
+
+ mutex_unlock(&i915->drm.struct_mutex);
+ igt_global_reset_unlock(i915);
+
+ return i915_terminally_wedged(&i915->gpu_error) ? -EIO : 0;
+}
+
static bool wait_for_idle(struct intel_engine_cs *engine)
{
return wait_for(intel_engine_is_idle(engine), IGT_IDLE_TIMEOUT) == 0;
@@ -1452,6 +1474,7 @@ int intel_hangcheck_live_selftests(struct
drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_global_reset), /* attempt to recover GPU first */
+ SUBTEST(igt_wedged_reset),
SUBTEST(igt_hang_sanitycheck),
SUBTEST(igt_reset_idle_engine),
SUBTEST(igt_reset_active_engine),
--
2.20.0.rc2
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