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drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H

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While debugging an issue with full GT resets I went down a rabbit hole
thinking the scrubbing of lost G2H wasn't working correctly. This proved
to be incorrect as this was working just fine but this chase inspired me
to write a selftest to prove that this works. This simple selftest
injects errors dropping various G2H and then issues a full GT reset
proving that the scrubbing of these G2H doesn't blow up.

v2:
 (Daniel Vetter)
  - Use ifdef instead of macros for selftests
v3:
 (Checkpatch)
  - A space after 'switch' statement
v4:
 (Daniele)
  - A comment saying GT won't idle if G2H are lost

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210909164744.31249-12-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2021-09-09 09:47:32 -07:00
committed by John Harrison
parent d135865cb8
commit d2420c2ed8
6 changed files with 185 additions and 0 deletions
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12
drivers/gpu/drm/i915/selftests/intel_scheduler_helpers.c
View File

@@ -14,6 +14,18 @@
#define REDUCED_PREEMPT 10
#define WAIT_FOR_RESET_TIME 10000
struct intel_engine_cs *intel_selftest_find_any_engine(struct intel_gt *gt)
{
struct intel_engine_cs *engine;
enum intel_engine_id id;
for_each_engine(engine, gt, id)
return engine;
pr_err("No valid engine found!\n");
return NULL;
}
int intel_selftest_modify_policy(struct intel_engine_cs *engine,
struct intel_selftest_saved_policy *saved,
u32 modify_type)