1 files changed, 36 insertions, 0 deletions
diff --git a/src/include/gpxe/retry.h b/src/include/gpxe/retry.h
new file mode 100644
index 000000000..8a9e2cf6f
--- /dev/null
+++ b/src/include/gpxe/retry.h
@@ -0,0 +1,36 @@
+#ifndef _GPXE_RETRY_H
+#define _GPXE_RETRY_H
+
+/** @file
+ *
+ * Retry timers
+ *
+ */
+
+#include <gpxe/list.h>
+
+/** Effective maximum retry count for exponential backoff calculation */
+#define BACKOFF_LIMIT 5
+
+/** A retry timer */
+struct retry_timer {
+	/** List of active timers */
+	struct list_head list;
+	/** Base timeout (in ticks) */
+	unsigned int base;
+	/** Retry count */
+	unsigned int retries;
+	/** Expiry time (in ticks) */
+	unsigned long expiry;
+	/** Timer expired callback
+	 *
+	 * @v timer	Retry timer
+	 */
+	void ( * expired ) ( struct retry_timer *timer );
+};
+
+extern void start_timer ( struct retry_timer *timer );
+extern void reset_timer ( struct retry_timer *timer );
+extern void stop_timer ( struct retry_timer *timer );
+
+#endif /* _GPXE_RETRY_H */