[Intel-gfx] [CI] drm/i915/gt: Bump the PP_DIR invalidation for Baytrail

[Chris Wilson]

Invalidate the ring TLB and increase the delay required for Baytrail.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 .../gpu/drm/i915/gt/intel_ring_submission.c   | 29 +++++++++++++++++--
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 42e3405b9996..460e104276d8 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -1396,6 +1396,25 @@ static int load_pd_dir(struct i915_request *rq, const struct i915_ppgtt *ppgtt)
 	return 0;
 }
 
+static int flush_tlb(struct i915_request *rq)
+{
+	const struct intel_engine_cs * const engine = rq->engine;
+	u32 *cs;
+
+	cs = intel_ring_begin(rq, 4);
+	if (IS_ERR(cs))
+		return PTR_ERR(cs);
+
+	*cs++ = MI_LOAD_REGISTER_IMM(1);
+	*cs++ = i915_mmio_reg_offset(RING_INSTPM(engine->mmio_base));
+	*cs++ = _MASKED_BIT_ENABLE(INSTPM_TLB_INVALIDATE);
+
+	*cs++ = MI_NOOP;
+	intel_ring_advance(rq, cs);
+
+	return 0;
+}
+
 static inline int mi_set_context(struct i915_request *rq, u32 flags)
 {
 	struct drm_i915_private *i915 = rq->i915;
@@ -1578,7 +1597,7 @@ static int switch_context(struct i915_request *rq)
 	GEM_BUG_ON(HAS_EXECLISTS(rq->i915));
 
 	if (vm) {
-		int loops = 4; /* 2 for Haswell? 4 for Baytrail! */
+		int loops = 8; /* 2 for Haswell? 8 for Baytrail! */
 
 		/*
 		 * Not only do we need a full barrier (post-sync write) after
@@ -1588,8 +1607,12 @@ static int switch_context(struct i915_request *rq)
 		 * post-sync op, this extra pass appears vital before a
 		 * mm switch!
 		 */
+		ret = rq->engine->emit_flush(rq, EMIT_INVALIDATE);
+		if (ret)
+			return ret;
+
 		do {
-			ret = rq->engine->emit_flush(rq, EMIT_FLUSH);
+			ret = flush_tlb(rq);
 			if (ret)
 				return ret;
 
@@ -1598,7 +1621,7 @@ static int switch_context(struct i915_request *rq)
 				return ret;
 		} while (--loops);
 
-		ret = rq->engine->emit_flush(rq, EMIT_INVALIDATE);
+		ret = rq->engine->emit_flush(rq, EMIT_FLUSH);
 		if (ret)
 			return ret;
 	}
-- 
2.24.0