1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_sync.h b/drivers/gpu/drm/imagination/pvr_sync.h
new file mode 100644
index 000000000000..db6ccfda104a
--- /dev/null
+++ b/drivers/gpu/drm/imagination/pvr_sync.h
@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+/* Copyright (c) 2023 Imagination Technologies Ltd. */
+
+#ifndef PVR_SYNC_H
+#define PVR_SYNC_H
+
+#include <uapi/drm/pvr_drm.h>
+
+/* Forward declaration from <linux/xarray.h>. */
+struct xarray;
+
+/* Forward declaration from <drm/drm_file.h>. */
+struct drm_file;
+
+/* Forward declaration from <drm/gpu_scheduler.h>. */
+struct drm_sched_job;
+
+/* Forward declaration from "pvr_device.h". */
+struct pvr_file;
+
+/**
+ * struct pvr_sync_signal - Object encoding a syncobj signal operation
+ *
+ * The job submission logic collects all signal operations in an array of
+ * pvr_sync_signal objects. This array also serves as a cache to get the
+ * latest dma_fence when multiple jobs are submitted at once, and one job
+ * signals a syncobj point that's later waited on by a subsequent job.
+ */
+struct pvr_sync_signal {
+	/** @handle: Handle of the syncobj to signal. */
+	u32 handle;
+
+	/**
+	 * @point: Point to signal in the syncobj.
+	 *
+	 * Only relevant for timeline syncobjs.
+	 */
+	u64 point;
+
+	/** @syncobj: Syncobj retrieved from the handle. */
+	struct drm_syncobj *syncobj;
+
+	/**
+	 * @chain: Chain object used to link the new fence with the
+	 *	   existing timeline syncobj.
+	 *
+	 * Should be zero when manipulating a regular syncobj.
+	 */
+	struct dma_fence_chain *chain;
+
+	/**
+	 * @fence: New fence object to attach to the syncobj.
+	 *
+	 * This pointer starts with the current fence bound to
+	 * the <handle,point> pair.
+	 */
+	struct dma_fence *fence;
+};
+
+void
+pvr_sync_signal_array_cleanup(struct xarray *array);
+
+int
+pvr_sync_signal_array_collect_ops(struct xarray *array,
+				  struct drm_file *file,
+				  u32 sync_op_count,
+				  const struct drm_pvr_sync_op *sync_ops);
+
+int
+pvr_sync_signal_array_update_fences(struct xarray *array,
+				    u32 sync_op_count,
+				    const struct drm_pvr_sync_op *sync_ops,
+				    struct dma_fence *done_fence);
+
+void
+pvr_sync_signal_array_push_fences(struct xarray *array);
+
+int
+pvr_sync_add_deps_to_job(struct pvr_file *pvr_file, struct drm_sched_job *job,
+			 u32 sync_op_count,
+			 const struct drm_pvr_sync_op *sync_ops,
+			 struct xarray *signal_array);
+
+#endif /* PVR_SYNC_H */