6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
[ Upstream commit 78a6ccd65fa3a7cc697810db079cc4b84dff03d5 ]
All memory traffic must be quiesced before requesting
an aux invalidation on platforms that use Aux CCS.
Fixes: 972282c4cf24 ("drm/i915/gen12: Add aux table invalidate for all engines")
Requires: a2a4aa0eef3b ("drm/i915: Add the gen12_needs_ccs_aux_inv helper")
Signed-off-by: Jonathan Cavitt <jonathan.cavitt@xxxxxxxxx>
Signed-off-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.8+
Reviewed-by: Nirmoy Das <nirmoy.das@xxxxxxxxx>
Reviewed-by: Andrzej Hajda <andrzej.hajda@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230725001950.1014671-4-andi.shyti@xxxxxxxxxxxxxxx
(cherry picked from commit ad8ebf12217e451cd19804b1c3e97ad56491c74a)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index 8e286733a4367..6a8c2fab4ca81 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -193,7 +193,11 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 mode)
{
struct intel_engine_cs *engine = rq->engine;
- if (mode & EMIT_FLUSH) {
+ /*
+ * On Aux CCS platforms the invalidation of the Aux
+ * table requires quiescing memory traffic beforehand
+ */
+ if (mode & EMIT_FLUSH || gen12_needs_ccs_aux_inv(engine)) {
u32 flags = 0;
u32 *cs;
--
2.40.1
