[Intel-gfx] [PATCH] drm/i915: Initialize workarounds in logical ring mode too

[Arun Siluvery]

From: Michel Thierry <michel.thierry at intel.com>

Following the legacy ring submission example, update the
ring->init_context() hook to support the execlist submission mode.

v2: update to use the new workaround macros and cleanup unused code.
This takes care of both bdw and chv workarounds.

v2.1: Add missing call to init_context() during deferred context creation.

Issue: VIZ-4092
Issue: GMIN-3475
Change-Id: Ie3d093b2542ab0e2a44b90460533e2f979788d6c
Cc: Deepak S <deepak.s at intel.com>
Signed-off-by: Michel Thierry <michel.thierry at intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_gem_context.c |  2 +-
 drivers/gpu/drm/i915/intel_lrc.c        | 46 ++++++++++++++++++++++++++++++++-
 drivers/gpu/drm/i915/intel_ringbuffer.c |  5 ++--
 drivers/gpu/drm/i915/intel_ringbuffer.h |  4 ++-
 4 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index a5221d8..a37668f 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -629,7 +629,7 @@ done:
 
 	if (uninitialized) {
 		if (ring->init_context) {
-			ret = ring->init_context(ring);
+			ret = ring->init_context(ring->buffer);
 			if (ret)
 				DRM_ERROR("ring init context: %d\n", ret);
 		}
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index cd74e5c..f3efdbd 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -991,6 +991,43 @@ int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords)
 	return 0;
 }
 
+static int intel_logical_ring_workarounds_emit(struct intel_ringbuffer *ringbuf)
+{
+	int ret, i;
+	struct intel_engine_cs *ring = ringbuf->ring;
+	struct drm_device *dev = ring->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct i915_workarounds *w = &dev_priv->workarounds;
+
+	if (WARN_ON(w->count == 0))
+		return 0;
+
+	ring->gpu_caches_dirty = true;
+	ret = logical_ring_flush_all_caches(ringbuf);
+	if (ret)
+		return ret;
+
+	ret = intel_logical_ring_begin(ringbuf, w->count * 2 + 2);
+	if (ret)
+		return ret;
+
+	intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(w->count));
+	for (i = 0; i < w->count; i++) {
+		intel_logical_ring_emit(ringbuf, w->reg[i].addr);
+		intel_logical_ring_emit(ringbuf, w->reg[i].value);
+	}
+	intel_logical_ring_emit(ringbuf, MI_NOOP);
+
+	intel_logical_ring_advance(ringbuf);
+
+	ring->gpu_caches_dirty = true;
+	ret = logical_ring_flush_all_caches(ringbuf);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int gen8_init_common_ring(struct intel_engine_cs *ring)
 {
 	struct drm_device *dev = ring->dev;
@@ -1034,7 +1071,7 @@ static int gen8_init_render_ring(struct intel_engine_cs *ring)
 
 	I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING));
 
-	return ret;
+	return init_workarounds_ring(ring);
 }
 
 static int gen8_emit_bb_start(struct intel_ringbuffer *ringbuf,
@@ -1282,6 +1319,7 @@ static int logical_render_ring_init(struct drm_device *dev)
 		ring->irq_keep_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
 
 	ring->init = gen8_init_render_ring;
+	ring->init_context = intel_logical_ring_workarounds_emit;
 	ring->cleanup = intel_fini_pipe_control;
 	ring->get_seqno = gen8_get_seqno;
 	ring->set_seqno = gen8_set_seqno;
@@ -1745,6 +1783,12 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
 	}
 
 	if (ring->id == RCS && !ctx->rcs_initialized) {
+		if (ring->init_context) {
+			ret = ring->init_context(ringbuf);
+			if (ret)
+				DRM_ERROR("ring init context: %d\n", ret);
+		}
+
 		ret = intel_lr_context_render_state_init(ring, ctx);
 		if (ret) {
 			DRM_ERROR("Init render state failed: %d\n", ret);
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 368b20a..70442fa 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -665,9 +665,10 @@ err:
 	return ret;
 }
 
-static int intel_ring_workarounds_emit(struct intel_engine_cs *ring)
+static int intel_ring_workarounds_emit(struct intel_ringbuffer *ringbuf)
 {
 	int ret, i;
+	struct intel_engine_cs *ring = ringbuf->ring;
 	struct drm_device *dev = ring->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct i915_workarounds *w = &dev_priv->workarounds;
@@ -806,7 +807,7 @@ static int chv_init_workarounds(struct intel_engine_cs *ring)
 	return 0;
 }
 
-static int init_workarounds_ring(struct intel_engine_cs *ring)
+int init_workarounds_ring(struct intel_engine_cs *ring)
 {
 	struct drm_device *dev = ring->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 96479c8..a69ef8b 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -148,7 +148,7 @@ struct  intel_engine_cs {
 
 	int		(*init)(struct intel_engine_cs *ring);
 
-	int		(*init_context)(struct intel_engine_cs *ring);
+	int		(*init_context)(struct intel_ringbuffer *ringbuf);
 
 	void		(*write_tail)(struct intel_engine_cs *ring,
 				      u32 value);
@@ -424,6 +424,8 @@ int intel_init_vebox_ring_buffer(struct drm_device *dev);
 u64 intel_ring_get_active_head(struct intel_engine_cs *ring);
 void intel_ring_setup_status_page(struct intel_engine_cs *ring);
 
+int init_workarounds_ring(struct intel_engine_cs *ring);
+
 static inline u32 intel_ring_get_tail(struct intel_ringbuffer *ringbuf)
 {
 	return ringbuf->tail;
-- 
2.1.2