drm/i915/execlists: Pull submit after dequeue under timeline lock

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In the next patch, we will begin processing the CSB from inside the
submission path (underneath an irqsoff section, and even from inside
interrupt handlers). This means that updating the execlists->port[] will
no longer be serialised by the tasklet but needs to be locked by the
engine->timeline.lock instead. Pull dequeue and submit under the same
lock for protection. (An alternate future plan is to keep the in/out
arrays separate for concurrent processing and reduced lock coverage.)

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/20180628201211.13837-2-chris@chris-wilson.co.uk

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Chris Wilson 2018-06-28 21:12:04 +01:00

parent 74093f3ecc

commit 0b02befa82

1 changed files with 12 additions and 20 deletions

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drivers/gpu/drm/i915/intel_lrc.c

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