From: Dave Gordon <david.s.gor...@intel.com>
With the scheduler, request allocation can happen long before
the ring is filled in, and in a different order. So for that case,
we update the request head at the start of _final (the initialisation
on allocation is stull useful for the direct-submission mode).
v2: Updated to use locally cached request pointer.
For: VIZ-2021
Signed-off-by: Dave Gordon <david.s.gor...@intel.com>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 +++
drivers/gpu/drm/i915/intel_lrc.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 0b2c4d1..f02300a 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1293,6 +1293,9 @@ int i915_gem_ringbuffer_submission_final(struct
i915_execbuffer_params *params)
if (ret)
goto error;
+ /* record where we start filling the ring */
+ req->head = intel_ring_get_tail(req->ringbuf);
+
/*
* Unconditionally invalidate gpu caches and ensure that we do flush
* any residual writes from the previous batch.
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 1062e85..ceba055 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1012,6 +1012,9 @@ int intel_execlists_submission_final(struct
i915_execbuffer_params *params)
if (ret)
goto err;
+ /* record where we start filling the ring */
+ req->head = intel_ring_get_tail(ringbuf);
+
/*
* Unconditionally invalidate gpu caches and ensure that we do flush
* any residual writes from the previous batch.
--
1.9.1
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