[Intel-gfx] [PATCH 04/25] drm/i915: add context information to objects

[Ben Widawsky]

Daniel originally shot this patch down as being a layering violation. In
fact, over time I've come to agree with him on this.

However, it is handy for debug information, and after the below commit,
I need some way to be able to not lazily bind objects to the gtt for
contexts.

commit 0ebb98299357e1dbeeea470eec29241263c8f244
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Feb 15 23:50:24 2012 +0100

    drm/i915: enable lazy global-gtt binding

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_drv.h         |    5 +++++
 drivers/gpu/drm/i915/i915_gem.c         |    1 +
 drivers/gpu/drm/i915/i915_gem_context.c |    6 +++++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f543679..9b309aa 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -993,6 +993,11 @@ struct drm_i915_gem_object {
 	 * reaches 0, dev_priv->pending_flip_queue will be woken up.
 	 */
 	atomic_t pending_flip;
+
+	/**
+	 * >= 0 if this object is the object for a context.
+	 */
+	int context_id;
 };
 
 #define to_intel_bo(x) container_of(x, struct drm_i915_gem_object, base)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 28f00dc..2142e9c 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3439,6 +3439,7 @@ struct drm_i915_gem_object *i915_gem_alloc_object(struct drm_device *dev,
 	obj->madv = I915_MADV_WILLNEED;
 	/* Avoid an unnecessary call to unbind on the first bind. */
 	obj->map_and_fenceable = true;
+	obj->context_id = -1;
 
 	return obj;
 }
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 2aca002..bf57123 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -162,7 +162,7 @@ create_hw_context(struct drm_device *dev,
 
 	/* Default context will never have a file_priv */
 	if (file_priv == NULL)
-		return 0;
+		goto out;
 
 	(*ctx_out)->file_priv = file_priv;
 
@@ -183,6 +183,8 @@ again:
 	else if (ret)
 		goto err_out;
 
+out:
+	(*ctx_out)->obj->context_id = (*ctx_out)->id;
 	return 0;
 
 err_out:
@@ -214,6 +216,8 @@ static int create_default_context(struct drm_i915_private *dev_priv)
 	 * default context.
 	 */
 	ctx = dev_priv->ring[RCS].default_context;
+	ctx->id = DEFAULT_CONTEXT_ID;
+	ctx->obj->context_id = DEFAULT_CONTEXT_ID;
 	ret = i915_gem_object_pin(ctx->obj, CONTEXT_ALIGN, false);
 	if (ret) {
 		do_destroy(ctx);
-- 
1.7.10.2