drm/i915: Add reference count to request structure

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The plan is to use request structures everywhere that seqno values were
previously used. This means saving pointers to structures in places that used to
be simple integers. In turn, that means that the target structure now needs much
more stringent lifetime tracking. That is, it must not be freed while some other
random object still holds a pointer to it.

To achieve this tracking, a reference count needs to be added. Whenever a
pointer to the structure is saved away, the count must be incremented and the
free must only occur when all references have been released.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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John Harrison 2014-11-24 18:49:24 +00:00 • committed by Daniel Vetter

parent 9eba5d4a1d

commit abfe262ae7

4 changed files with 48 additions and 8 deletions

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28

drivers/gpu/drm/i915/i915_drv.h

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20

drivers/gpu/drm/i915/i915_gem.c

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4

drivers/gpu/drm/i915/intel_lrc.c

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4

drivers/gpu/drm/i915/intel_ringbuffer.c

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