All of lore.kernel.org
 help / color / mirror / Atom feed
* [Intel-gfx] [PATCH 1/5] drm/i915/gem: Flush the pwrite through the chipset before signaling
@ 2019-12-06 10:55 Chris Wilson
  2019-12-06 10:55 ` [Intel-gfx] [PATCH 2/5] drm/i915: Claim vma while under closed_lock in i915_vma_parked() Chris Wilson
                   ` (7 more replies)
  0 siblings, 8 replies; 14+ messages in thread
From: Chris Wilson @ 2019-12-06 10:55 UTC (permalink / raw)
  To: intel-gfx; +Cc: matthew.auld

Before we signal the fence to indicate completion, ensure the pwrite
through the indirect GGTT is coherent (as best as we know) in memory.
Any listeners to the fence may start immediately and sample from the
backing store prior to the writes being posted, thus seeing stale data.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 98b65b718e1a..919d3a723c50 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -670,11 +670,12 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
 		user_data += page_length;
 		offset += page_length;
 	}
+
+	intel_gt_flush_ggtt_writes(ggtt->vm.gt);
 	intel_frontbuffer_flush(obj->frontbuffer, ORIGIN_CPU);
 
 	i915_gem_object_unlock_fence(obj, fence);
 out_unpin:
-	intel_gt_flush_ggtt_writes(ggtt->vm.gt);
 	if (drm_mm_node_allocated(&node)) {
 		ggtt->vm.clear_range(&ggtt->vm, node.start, node.size);
 		remove_mappable_node(ggtt, &node);
-- 
2.24.0

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply related	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2019-12-07 20:41 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-12-06 10:55 [Intel-gfx] [PATCH 1/5] drm/i915/gem: Flush the pwrite through the chipset before signaling Chris Wilson
2019-12-06 10:55 ` [Intel-gfx] [PATCH 2/5] drm/i915: Claim vma while under closed_lock in i915_vma_parked() Chris Wilson
2019-12-06 10:55 ` [Intel-gfx] [PATCH 3/5] drm/i915/gt: Acquire a GT wakeref for the breadcrumb interrupt Chris Wilson
2019-12-06 10:55 ` [Intel-gfx] [PATCH 4/5] drm/i915/gem: Pin gen6_ppgtt prior to constructing the request Chris Wilson
2019-12-06 23:31   ` Andi Shyti
2019-12-06 23:35     ` Chris Wilson
2019-12-06 10:55 ` [Intel-gfx] [PATCH 5/5] drm/i915: Avoid calling i915_gem_object_unbind holding object lock Chris Wilson
2019-12-07  0:03   ` Andi Shyti
2019-12-07  0:20     ` Chris Wilson
2019-12-07 19:24       ` Andi Shyti
2019-12-06 11:02 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for series starting with [1/5] drm/i915/gem: Flush the pwrite through the chipset before signaling Patchwork
2019-12-06 11:23 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2019-12-06 11:34 ` [Intel-gfx] [PATCH 1/5] " Tvrtko Ursulin
2019-12-06 22:38 ` [Intel-gfx] ✗ Fi.CI.IGT: failure for series starting with [1/5] " Patchwork

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.