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path: root/drivers/gpu/drm/i915/i915_timeline.h
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Diffstat (limited to 'drivers/gpu/drm/i915/i915_timeline.h')
-rw-r--r--drivers/gpu/drm/i915/i915_timeline.h61
1 files changed, 49 insertions, 12 deletions
diff --git a/drivers/gpu/drm/i915/i915_timeline.h b/drivers/gpu/drm/i915/i915_timeline.h
index ebd71b487220..7bec7d2e45bf 100644
--- a/drivers/gpu/drm/i915/i915_timeline.h
+++ b/drivers/gpu/drm/i915/i915_timeline.h
@@ -28,10 +28,14 @@
#include <linux/list.h>
#include <linux/kref.h>
+#include "i915_active.h"
#include "i915_request.h"
#include "i915_syncmap.h"
#include "i915_utils.h"
+struct i915_vma;
+struct i915_timeline_hwsp;
+
struct i915_timeline {
u64 fence_context;
u32 seqno;
@@ -40,6 +44,13 @@ struct i915_timeline {
#define TIMELINE_CLIENT 0 /* default subclass */
#define TIMELINE_ENGINE 1
+ unsigned int pin_count;
+ const u32 *hwsp_seqno;
+ struct i915_vma *hwsp_ggtt;
+ u32 hwsp_offset;
+
+ bool has_initial_breadcrumb;
+
/**
* List of breadcrumbs associated with GPU requests currently
* outstanding.
@@ -48,10 +59,10 @@ struct i915_timeline {
/* Contains an RCU guarded pointer to the last request. No reference is
* held to the request, users must carefully acquire a reference to
- * the request using i915_gem_active_get_request_rcu(), or hold the
+ * the request using i915_active_request_get_request_rcu(), or hold the
* struct_mutex.
*/
- struct i915_gem_active last_request;
+ struct i915_active_request last_request;
/**
* We track the most recent seqno that we wait on in every context so
@@ -63,24 +74,28 @@ struct i915_timeline {
* redundant and we can discard it without loss of generality.
*/
struct i915_syncmap *sync;
+
/**
- * Separately to the inter-context seqno map above, we track the last
- * barrier (e.g. semaphore wait) to the global engine timelines. Note
- * that this tracks global_seqno rather than the context.seqno, and
- * so it is subject to the limitations of hw wraparound and that we
- * may need to revoke global_seqno (on pre-emption).
+ * Barrier provides the ability to serialize ordering between different
+ * timelines.
+ *
+ * Users can call i915_timeline_set_barrier which will make all
+ * subsequent submissions to this timeline be executed only after the
+ * barrier has been completed.
*/
- u32 global_sync[I915_NUM_ENGINES];
+ struct i915_active_request barrier;
struct list_head link;
const char *name;
+ struct drm_i915_private *i915;
struct kref kref;
};
-void i915_timeline_init(struct drm_i915_private *i915,
- struct i915_timeline *tl,
- const char *name);
+int i915_timeline_init(struct drm_i915_private *i915,
+ struct i915_timeline *tl,
+ const char *name,
+ struct i915_vma *hwsp);
void i915_timeline_fini(struct i915_timeline *tl);
static inline void
@@ -103,7 +118,9 @@ i915_timeline_set_subclass(struct i915_timeline *timeline,
}
struct i915_timeline *
-i915_timeline_create(struct drm_i915_private *i915, const char *name);
+i915_timeline_create(struct drm_i915_private *i915,
+ const char *name,
+ struct i915_vma *global_hwsp);
static inline struct i915_timeline *
i915_timeline_get(struct i915_timeline *timeline)
@@ -142,6 +159,26 @@ static inline bool i915_timeline_sync_is_later(struct i915_timeline *tl,
return __i915_timeline_sync_is_later(tl, fence->context, fence->seqno);
}
+int i915_timeline_pin(struct i915_timeline *tl);
+void i915_timeline_unpin(struct i915_timeline *tl);
+
+void i915_timelines_init(struct drm_i915_private *i915);
void i915_timelines_park(struct drm_i915_private *i915);
+void i915_timelines_fini(struct drm_i915_private *i915);
+
+/**
+ * i915_timeline_set_barrier - orders submission between different timelines
+ * @timeline: timeline to set the barrier on
+ * @rq: request after which new submissions can proceed
+ *
+ * Sets the passed in request as the serialization point for all subsequent
+ * submissions on @timeline. Subsequent requests will not be submitted to GPU
+ * until the barrier has been completed.
+ */
+static inline int
+i915_timeline_set_barrier(struct i915_timeline *tl, struct i915_request *rq)
+{
+ return i915_active_request_set(&tl->barrier, rq);
+}
#endif