diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-21 18:43:39 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-10-21 21:01:52 +0100 |
| commit | b5e8e954eb672e7128e50589c43817b0ffce6f75 (patch) | |
| tree | 704bd8df9a1f494b271d7d51e6143bbc7de57338 /drivers/gpu/drm/i915/i915_priolist_types.h | |
| parent | 928da10c0ca2aee50099d63f20feeec71344ae67 (diff) | |
drm/i915/gt: Introduce barrier pulses along engines
To flush idle barriers, and even inflight requests, we want to send a
preemptive 'pulse' along an engine. We use a no-op request along the
pinned kernel_context at high priority so that it should run or else
kick off the stuck requests. We can use this to ensure idle barriers are
immediately flushed, as part of a context cancellation mechanism, or as
part of a heartbeat mechanism to detect and reset a stuck GPU.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191021174339.5389-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_priolist_types.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_priolist_types.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_priolist_types.h b/drivers/gpu/drm/i915/i915_priolist_types.h index 21037a2e2038..ae8bb3cb627e 100644 --- a/drivers/gpu/drm/i915/i915_priolist_types.h +++ b/drivers/gpu/drm/i915/i915_priolist_types.h @@ -39,6 +39,7 @@ enum { * active request. */ #define I915_PRIORITY_UNPREEMPTABLE INT_MAX +#define I915_PRIORITY_BARRIER INT_MAX #define __NO_PREEMPTION (I915_PRIORITY_WAIT) |