drm/i915: Assign every HW context a unique ID

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The hardware tracks contexts and expects all live contexts (those active
on the hardware) to have a unique identifier. This is used by the
hardware to assign pagefaults and the like to a particular context.

v2: Reorder to make sure ctx->link is not left dangling if the
assignment of a hw_id fails (Mika).

v3: We have 21bits of context space, not 20.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-17-git-send-email-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2016-04-28 09:56:51 +01:00

parent ef87bba828

commit 5d1808ecbc

3 changed files with 47 additions and 1 deletions

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2

drivers/gpu/drm/i915/i915_debugfs.c

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10

drivers/gpu/drm/i915/i915_drv.h

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36

drivers/gpu/drm/i915/i915_gem_context.c

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