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drm/i915: Integrate i915_sw_fence with debugobjects

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Add the tracking required to enable debugobjects for fences to improve
error detection in BAT. The debugobject interface lets us track the
lifetime and phases of the fences even while being embedded into larger
structs, i.e. to check they are not used after they have been released.

v2: Don't populate the stubs, debugobjects checks for a NULL pointer and
treats it equivalently.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161125131718.20978-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2016-11-25 13:17:18 +00:00
parent 48bc2a4a42
commit fc1584059d
4 changed files with 161 additions and 7 deletions
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13
drivers/gpu/drm/i915/Kconfig.debug
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@@ -22,6 +22,7 @@ config DRM_I915_DEBUG
select X86_MSR # used by igt/pm_rpm
select DRM_VGEM # used by igt/prime_vgem (dmabuf interop checks)
select DRM_DEBUG_MM if DRM=y
select DRM_I915_SW_FENCE_DEBUG_OBJECTS if DRM_I915=y
default n
help
Choose this option to turn on extra driver debugging that may affect
@@ -43,3 +44,15 @@ config DRM_I915_DEBUG_GEM
If in doubt, say "N".
config DRM_I915_SW_FENCE_DEBUG_OBJECTS
bool "Enable additional driver debugging for fence objects"
depends on DRM_I915=y
select DEBUG_OBJECTS
default n
help
Choose this option to turn on extra driver debugging that may affect
performance but will catch some internal issues.
Recommended for driver developers only.
If in doubt, say "N".