[Intel-gfx] [PATCH 45/66] drm/i915: Add a context open function

[Ben Widawsky]

We'll be doing a bit more stuff with each file, so having our own open
function should make things clean.

This also allows us to easily add conditionals for stuff we don't want
to do when we don't have HW contexts.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_dma.c         |  4 +---
 drivers/gpu/drm/i915/i915_drv.h         |  1 +
 drivers/gpu/drm/i915/i915_gem_context.c | 22 ++++++++++++++++++++++
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 4b330e5..9955dc7 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1789,9 +1789,7 @@ int i915_driver_open(struct drm_device *dev, struct drm_file *file)
 	spin_lock_init(&file_priv->mm.lock);
 	INIT_LIST_HEAD(&file_priv->mm.request_list);
 
-	idr_init(&file_priv->context_idr);
-
-	return 0;
+	return i915_gem_context_open(dev, file);
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index bead414..19ae0dc 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1891,6 +1891,7 @@ i915_gem_ggtt_pin(struct drm_i915_gem_object *obj,
 void i915_gem_context_init(struct drm_device *dev);
 void i915_gem_context_fini(struct drm_device *dev);
 int i915_gem_context_enable(struct drm_i915_private *dev_priv);
+int i915_gem_context_open(struct drm_device *dev, struct drm_file *file);
 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
 int i915_switch_context(struct intel_ring_buffer *ring,
 			struct drm_file *file, int to_id);
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 9176559..a5ac6dd 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -351,9 +351,31 @@ i915_gem_context_get_hang_stats(struct intel_ring_buffer *ring,
 	return &to->hang_stats;
 }
 
+int i915_gem_context_open(struct drm_device *dev, struct drm_file *file)
+{
+	struct drm_i915_file_private *file_priv = file->driver_priv;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	mutex_lock(&dev->struct_mutex);
+	if (dev_priv->hw_contexts_disabled) {
+		mutex_unlock(&dev->struct_mutex);
+		return 0;
+	}
+
+	mutex_unlock(&dev->struct_mutex);
+
+	idr_init(&file_priv->context_idr);
+
+	return 0;
+}
+
 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_i915_file_private *file_priv = file->driver_priv;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (dev_priv->hw_contexts_disabled)
+		return;
 
 	mutex_lock(&dev->struct_mutex);
 	idr_for_each(&file_priv->context_idr, context_idr_cleanup, NULL);
-- 
1.8.3.1