[PATCH 10/11] drm/i915/context: track contexts per device

[ben at bwidawsk.net (Ben Widawsky)]

Nice to have a list of contexts handy for debug and perhaps other things
in the future.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_context.c |    8 ++++++--
 drivers/gpu/drm/i915/i915_drv.h     |    3 +++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_context.c b/drivers/gpu/drm/i915/i915_context.c
index 0547411..93a3822 100644
--- a/drivers/gpu/drm/i915/i915_context.c
+++ b/drivers/gpu/drm/i915/i915_context.c
@@ -193,11 +193,13 @@ static int logical_context_alloc(struct drm_device *dev, struct drm_file *file,
 	if (!ret)
 		ctx->ring_enable |= (1 << RCS);
 
-	if (ctx->ring_enable)
+	if (ctx->ring_enable) {
 		DRM_DEBUG_DRIVER("Context %d allocated, rings %x\n", ctx->id,
 				 ctx->ring_enable);
-	else
+		list_add(&ctx->context_link, &dev_priv->context_list);
+	} else {
 		ctx = NULL;
+	}
 
 	*ctx_out = ctx;
 	return 0;
@@ -298,6 +300,7 @@ static int logical_context_free(struct drm_file *file, uint32_t id)
 
 	BUG_ON(ctx->obj->pin_count > 1);
 	drm_gem_object_unreference(&ctx->obj->base);
+	list_del(&ctx->context_link);
 
 	context_destroy_id(ctx);
 
@@ -404,6 +407,7 @@ void i915_context_load(struct drm_device *dev)
 	size = roundup(size, 4096);
 	dev_priv->context_size = size;
 	DRM_DEBUG_DRIVER("Logical context size = %d\n", size);
+	INIT_LIST_HEAD(&dev_priv->context_list);
 	ret = logical_context_alloc(dev, NULL, &dev_priv->default_context);
 	if (ret)
 		dev_priv->contexts_disabled = true;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 13e088f..165a5a5 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -765,6 +765,7 @@ typedef struct drm_i915_private {
 	uint32_t context_size;
 	struct drm_i915_gem_context *default_context;
 	bool contexts_disabled;
+	struct list_head context_list;
 } drm_i915_private_t;
 
 enum i915_cache_level {
@@ -968,6 +969,8 @@ struct drm_i915_gem_context {
 	struct drm_i915_gem_object *obj;
 	bool is_default;
 	bool is_initialized;
+
+	struct list_head context_link;
 };
 
 #define I915_CONTEXT_NORMAL_SWITCH	(1 << 0)
-- 
1.7.9