@@ -422,6 +422,8 @@ Batchbuffer Parsing
User Batchbuffer Execution
--------------------------
+.. kernel-doc:: drivers/gpu/drm/i915/gem/i915_gem_context_types.h
+
.. kernel-doc:: drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
:doc: User command execution
@@ -30,19 +30,39 @@ struct i915_address_space;
struct intel_timeline;
struct intel_ring;
+/**
+ * struct i915_gem_engines - A set of engines
+ */
struct i915_gem_engines {
union {
+ /** @link: Link in i915_gem_context::stale::engines */
struct list_head link;
+
+ /** @rcu: RCU to use when freeing */
struct rcu_head rcu;
};
+
+ /** @fence: Fence used for delayed destruction of engines */
struct i915_sw_fence fence;
+
+ /** @ctx: i915_gem_context backpointer */
struct i915_gem_context *ctx;
+
+ /** @num_engines: Number of engines in this set */
unsigned int num_engines;
+
+ /** @engines: Array of engines */
struct intel_context *engines[];
};
+/**
+ * struct i915_gem_engines_iter - Iterator for an i915_gem_engines set
+ */
struct i915_gem_engines_iter {
+ /** @idx: Index into i915_gem_engines::engines */
unsigned int idx;
+
+ /** @engines: Engine set being iterated */
const struct i915_gem_engines *engines;
};
@@ -53,10 +73,10 @@ struct i915_gem_engines_iter {
* logical hardware state for a particular client.
*/
struct i915_gem_context {
- /** i915: i915 device backpointer */
+ /** @i915: i915 device backpointer */
struct drm_i915_private *i915;
- /** file_priv: owning file descriptor */
+ /** @file_priv: owning file descriptor */
struct drm_i915_file_private *file_priv;
/**
@@ -81,7 +101,9 @@ struct i915_gem_context {
* CONTEXT_USER_ENGINES flag is set).
*/
struct i915_gem_engines __rcu *engines;
- struct mutex engines_mutex; /* guards writes to engines */
+
+ /** @engines_mutex: guards writes to engines */
+ struct mutex engines_mutex;
/**
* @syncobj: Shared timeline syncobj
@@ -118,7 +140,7 @@ struct i915_gem_context {
*/
struct pid *pid;
- /** link: place with &drm_i915_private.context_list */
+ /** @link: place with &drm_i915_private.context_list */
struct list_head link;
/**
@@ -153,11 +175,13 @@ struct i915_gem_context {
#define CONTEXT_CLOSED 0
#define CONTEXT_USER_ENGINES 1
+ /** @mutex: guards everything that isn't engines or handles_vma */
struct mutex mutex;
+ /** @sched: scheduler parameters */
struct i915_sched_attr sched;
- /** guilty_count: How many times this context has caused a GPU hang. */
+ /** @guilty_count: How many times this context has caused a GPU hang. */
atomic_t guilty_count;
/**
* @active_count: How many times this context was active during a GPU
@@ -171,15 +195,17 @@ struct i915_gem_context {
unsigned long hang_timestamp[2];
#define CONTEXT_FAST_HANG_JIFFIES (120 * HZ) /* 3 hangs within 120s? Banned! */
- /** remap_slice: Bitmask of cache lines that need remapping */
+ /** @remap_slice: Bitmask of cache lines that need remapping */
u8 remap_slice;
/**
- * handles_vma: rbtree to look up our context specific obj/vma for
+ * @handles_vma: rbtree to look up our context specific obj/vma for
* the user handle. (user handles are per fd, but the binding is
* per vm, which may be one per context or shared with the global GTT)
*/
struct radix_tree_root handles_vma;
+
+ /** @lut_mutex: Locks handles_vma */
struct mutex lut_mutex;
/**
@@ -191,8 +217,11 @@ struct i915_gem_context {
*/
char name[TASK_COMM_LEN + 8];
+ /** @stale: tracks stale engines to be destroyed */
struct {
+ /** @lock: guards engines */
spinlock_t lock;
+ /** @engines: list of stale engines */
struct list_head engines;
} stale;
};