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drm/i915/gt: Remove direct invocation of breadcrumb signaling

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Only signal the breadcrumbs from inside the irq_work, simplifying our
interface and calling conventions. The micro-optimisation here is that
by always using the irq_work interface, we know we are always inside an
irq-off critical section for the breadcrumb signaling and can ellide
save/restore of the irq flags.

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/20191217095642.3124521-7-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-12-17 09:56:41 +00:00
parent df6a420535
commit 54400257ae
10 changed files with 27 additions and 38 deletions
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2
drivers/gpu/drm/i915/i915_request.c
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@@ -408,7 +408,7 @@ xfer: /* We may be recursing from the signal callback of another i915 fence */
if (test_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT, &request->fence.flags) &&
!test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &request->fence.flags) &&
!i915_request_enable_breadcrumb(request))
intel_engine_queue_breadcrumbs(engine);
intel_engine_signal_breadcrumbs(engine);
__notify_execute_cb(request);