| Message ID | 20201231110837.1832-1-chris@chris-wilson.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/i915/gt: Disable arbitration on no-preempt requests | expand |
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c index 1972dd5dca00..2e36e0a9d8a6 100644 --- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c +++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c @@ -427,6 +427,9 @@ int gen8_emit_bb_start(struct i915_request *rq, { u32 *cs; + if (unlikely(i915_request_has_nopreempt(rq))) + return gen8_emit_bb_start_noarb(rq, offset, len, flags); + cs = intel_ring_begin(rq, 6); if (IS_ERR(cs)) return PTR_ERR(cs);
If a request is submitted and known to require no preemption, disable arbitration around the batch which prevents the HW from handling a preemption request during the payload. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Matthew Brost <matthew.brost@intel.com> Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com> --- drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 3 +++ 1 file changed, 3 insertions(+)