[PATCH 9/9] drm/i915/doc: Add kernel doc for i915_sched_engine

[Matthew Brost]

Signed-off-by: Matthew Brost <matthew.br...@intel.com>
---
 Documentation/gpu/i915.rst                  |  6 ++++
 drivers/gpu/drm/i915/i915_scheduler_types.h | 37 ++++++++++++++++++---
 2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/Documentation/gpu/i915.rst b/Documentation/gpu/i915.rst
index 42ce0196930a..8f4f5471a05b 100644
--- a/Documentation/gpu/i915.rst
+++ b/Documentation/gpu/i915.rst
@@ -425,6 +425,12 @@ User Batchbuffer Execution
 .. kernel-doc:: drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
    :doc: User command execution
 
+Scheduling
+----------
+.. kernel-doc:: drivers/gpu/drm/i915/i915_scheduler_types.h
+   :functions: i915_sched_engine
+
+
 Logical Rings, Logical Ring Contexts and Execlists
 --------------------------------------------------
 
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h 
b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 9d79514450de..e3da7517853f 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -91,7 +91,21 @@ struct i915_dependency {
                                &(rq__)->sched.signalers_list, \
                                signal_link)
 
+/**
+ * sturct i915_sched_engine - scheduler engine
+ *
+ * A schedule engine represents a submission queue with different priority
+ * bands. It contains all the common state (relative to the backend) to queue,
+ * track, and submit a request.
+ *
+ * This object at the moment is quite i915 specific but will transition into a
+ * container for the drm_gpu_scheduler plus a few other variables once the i915
+ * is integrated with the DRM scheduler.
+ */
 struct i915_sched_engine {
+       /**
+        * @ref: reference count of schedule engine object
+        */
        struct kref ref;
 
        /**
@@ -100,11 +114,18 @@ struct i915_sched_engine {
         */
        spinlock_t lock;
 
+       /**
+        * @requests: list of requests inflight on this schedule engine
+        */
        struct list_head requests;
-       struct list_head hold; /* ready requests, but on hold */
 
        /**
-        * @tasklet: softirq tasklet for bottom handler
+        * @hold: list of requests on hold.
+        */
+       struct list_head hold;
+
+       /**
+        * @tasklet: softirq tasklet for submission
         */
        struct tasklet_struct tasklet;
 
@@ -137,14 +158,20 @@ struct i915_sched_engine {
         */
        bool no_priolist;
 
-       /* Back pointer to engine */
+       /**
+        * @engine: back pointer to engine
+        */
        struct intel_engine_cs *engine;
 
-       /* Kick backend */
+       /**
+        * @kick_backed: kick back after a request's priority has changed
+        */
        void    (*kick_backend)(const struct i915_request *rq,
                                int prio);
 
-       /*
+       /**
+        * @schedule: schedule function to adjust priority of request
+        *
         * Call when the priority on a request has changed and it and its
         * dependencies may need rescheduling. Note the request itself may
         * not be ready to run!
-- 
2.28.0