Hiding the initial set_bo() required for the "overwrite-source" tests
lead to a nice bit of hilarity as I missed repeating the initialisation
for the multiple loops of the interruptible version of
"overwrite-source".
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Daniel preferred to keep the old tests intact lest we accidentally break
them, and to add the new interruptible tests as new subtests.
In the process also make sure the GPU is idle before starting each loop.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
In order to exercise the bug behind:
commit 22fd5ca947b58901927d100d2b1aa0f1672b3435
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri Jun 28 16:54:08 2013 +0100
drm/i915: Only clear write-domains after a successful wait-seqno
we need to check for concurrent access with the potential to be
interrupted by a signal. The framework for doing so is already in place,
so just enable it and repeat the tests for longer to give better chance
of being interrupted at just the wrong moment.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Small changes to avoid expensive setup just to print out the subtest
list, and setting up the source buffers such that "early-read" works
without having run "overwrite-soure" right beforehand.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
By adding another testcase that follows up with a gpu read. This
checks whether the kernel properly tracks the pending write and
doesn't lose it (or sync up to the wrong seqno).
For some odd reason only the cpu mmap variant blows up, the gtt one
works here. I need to look into that some more.
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Designed to exercise this patch to i915.ko:
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index fbf1118..57ae1f2 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3181,9 +3181,11 @@ i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_obj
if (ret)
return ret;
- ret = i915_gem_object_wait_rendering(obj);
- if (ret)
- return ret;
+ if (write || obj->pending_gpu_write) {
+ ret = i915_gem_object_wait_rendering(obj);
+ if (ret)
+ return ret;
+ }
i915_gem_object_flush_gtt_write_domain(obj);
By exercising the conditions whereby should either of the checks be missed
an error is detected.
