Re: [PATCH 23/53] drm/i915: Update do_switch() to take a request structure

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On 19/02/2015 17:17, John.C.Harrison@xxxxxxxxx wrote:
From: John Harrison <John.C.Harrison@xxxxxxxxx>

Updated do_switch() to take a request pointer instead of a ring/context pair.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_gem_context.c |   17 +++++++++--------
  1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index b326f8d..eedb994 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -556,9 +556,10 @@ mi_set_context(struct intel_engine_cs *ring,
  	return ret;
  }

-static int do_switch(struct intel_engine_cs *ring,
-		     struct intel_context *to)
+static int do_switch(struct drm_i915_gem_request *req)
  {
+	struct intel_context *to = req->ctx;
+	struct intel_engine_cs *ring = req->ring;
  	struct drm_i915_private *dev_priv = ring->dev->dev_private;
  	struct intel_context *from = ring->last_context;
  	u32 hw_flags = 0;
@@ -591,7 +592,7 @@ static int do_switch(struct intel_engine_cs *ring,

  	if (to->ppgtt) {
  		trace_switch_mm(ring, to);
-		ret = to->ppgtt->switch_mm(to->ppgtt, ring);
+		ret = to->ppgtt->switch_mm(to->ppgtt, req->ring);

No need for this change, ring = req->ring has already been set up. Just leave the code as it was.

  		if (ret)
  			goto unpin_out;
  	}
@@ -627,7 +628,7 @@ static int do_switch(struct intel_engine_cs *ring,
  	if (!to->legacy_hw_ctx.initialized || i915_gem_context_is_default(to))
  		hw_flags |= MI_RESTORE_INHIBIT;

-	ret = mi_set_context(ring, to, hw_flags);
+	ret = mi_set_context(req->ring, to, hw_flags);

No need for this change, ring = req->ring has already been set up. Just leave the code as it was.

  	if (ret)
  		goto unpin_out;

@@ -635,7 +636,7 @@ static int do_switch(struct intel_engine_cs *ring,
  		if (!(to->remap_slice & (1<<i)))
  			continue;

-		ret = i915_gem_l3_remap(ring, i);
+		ret = i915_gem_l3_remap(req->ring, i);

No need for this change, ring = req->ring has already been set up. Just leave the code as it was.

  		/* If it failed, try again next round */
  		if (ret)
  			DRM_DEBUG_DRIVER("L3 remapping failed\n");
@@ -651,7 +652,7 @@ static int do_switch(struct intel_engine_cs *ring,
  	 */
  	if (from != NULL) {
  		from->legacy_hw_ctx.rcs_state->base.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
-		i915_vma_move_to_active(i915_gem_obj_to_ggtt(from->legacy_hw_ctx.rcs_state), ring);
+		i915_vma_move_to_active(i915_gem_obj_to_ggtt(from->legacy_hw_ctx.rcs_state), req->ring);

No need for this change, ring = req->ring has already been set up. Just leave the code as it was.

  		/* As long as MI_SET_CONTEXT is serializing, ie. it flushes the
  		 * whole damn pipeline, we don't need to explicitly mark the
  		 * object dirty. The only exception is that the context must be
@@ -677,7 +678,7 @@ done:

  	if (uninitialized) {
  		if (ring->init_context) {
-			ret = ring->init_context(ring, to);
+			ret = ring->init_context(req->ring, to);

No need for this change, ring = req->ring has already been set up. Just leave the code as it was.

  			if (ret)
  				DRM_ERROR("ring init context: %d\n", ret);
  		}
@@ -722,7 +723,7 @@ int i915_switch_context(struct drm_i915_gem_request *req)
  		return 0;
  	}

-	return do_switch(req->ring, req->ctx);
+	return do_switch(req);
  }

  static bool contexts_enabled(struct drm_device *dev)


Thanks,
Tomas
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