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drm/i915/selftests: Force a preemption hang

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Inject a failure into preemption completion to pretend as if the HW
didn't successfully handle preemption and we are forced to do a reset in
the middle.

v2: Wait for preemption, to force testing with the missed preemption.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180716132154.12539-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2018-07-16 14:21:54 +01:00
parent 0051163ab3
commit 0f6b79fa13
4 changed files with 148 additions and 0 deletions
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27
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -193,6 +193,11 @@ struct i915_priolist {
int priority;
};
struct st_preempt_hang {
struct completion completion;
bool inject_hang;
};
/**
* struct intel_engine_execlists - execlist submission queue and port state
*
@@ -333,6 +338,8 @@ struct intel_engine_execlists {
* @csb_head: context status buffer head
*/
u8 csb_head;
I915_SELFTEST_DECLARE(struct st_preempt_hang preempt_hang;)
};
#define INTEL_ENGINE_CS_MAX_NAME 8
@@ -1155,4 +1162,24 @@ void intel_disable_engine_stats(struct intel_engine_cs *engine);
ktime_t intel_engine_get_busy_time(struct intel_engine_cs *engine);
#if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
static inline bool inject_preempt_hang(struct intel_engine_execlists *execlists)
{
if (!execlists->preempt_hang.inject_hang)
return false;
complete(&execlists->preempt_hang.completion);
return true;
}
#else
static inline bool inject_preempt_hang(struct intel_engine_execlists *execlists)
{
return false;
}
#endif
#endif /* _INTEL_RINGBUFFER_H_ */