[Intel-gfx] [PATCH] drm/i915/selftests: Allow engine reset failure to do a GT reset in hangcheck selftest

[Matthew Brost]

The hangcheck selftest blocks per engine resets by setting magic bits in
the reset flags. This is incorrect for GuC submission because if the GuC
fails to reset an engine we would like to do a full GT reset. Do no set
these magic bits when using GuC submission.

Side note this lockless algorithm with magic bits to block resets really
should be ripped out.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 7e2d99dd012d..90a03c60c80c 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -734,7 +734,8 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 		reset_engine_count = i915_reset_engine_count(global, engine);
 
 		st_engine_heartbeat_disable(engine);
-		set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
+		if (!using_guc)
+			set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		count = 0;
 		do {
 			struct i915_request *rq = NULL;
@@ -824,7 +825,8 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
 			if (err)
 				break;
 		} while (time_before(jiffies, end_time));
-		clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
+		if (!using_guc)
+			clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		st_engine_heartbeat_enable(engine);
 		pr_info("%s: Completed %lu %s resets\n",
 			engine->name, count, active ? "active" : "idle");
@@ -1042,7 +1044,8 @@ static int __igt_reset_engines(struct intel_gt *gt,
 		yield(); /* start all threads before we begin */
 
 		st_engine_heartbeat_disable_no_pm(engine);
-		set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
+		if (!using_guc)
+			set_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		do {
 			struct i915_request *rq = NULL;
 			struct intel_selftest_saved_policy saved;
@@ -1165,7 +1168,8 @@ static int __igt_reset_engines(struct intel_gt *gt,
 			if (err)
 				break;
 		} while (time_before(jiffies, end_time));
-		clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
+		if (!using_guc)
+			clear_bit(I915_RESET_ENGINE + id, &gt->reset.flags);
 		st_engine_heartbeat_enable_no_pm(engine);
 
 		pr_info("i915_reset_engine(%s:%s): %lu resets\n",
-- 
2.32.0