drm/i915: Pin backing pages whilst exporting through a dmabuf vmap

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We need to refcount our pages in order to prevent reaping them at
inopportune times, such as when they currently vmapped or exported to
another driver. However, we also wish to keep the lazy deallocation of
our pages so we need to take a pin/unpinned approach rather than a
simple refcount.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Chris Wilson 2012-09-04 21:02:54 +01:00 • committed by Daniel Vetter

parent 37e680a15f

commit a5570178c0

3 changed files with 27 additions and 4 deletions

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12

drivers/gpu/drm/i915/i915_drv.h

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11

drivers/gpu/drm/i915/i915_gem.c

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8

drivers/gpu/drm/i915/i915_gem_dmabuf.c

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