1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_task.h b/drivers/infiniband/sw/rxe/rxe_task.h
new file mode 100644
index 000000000..b3dfd970d
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_task.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
+ */
+
+#ifndef RXE_TASK_H
+#define RXE_TASK_H
+
+enum {
+	TASK_STATE_START	= 0,
+	TASK_STATE_BUSY		= 1,
+	TASK_STATE_ARMED	= 2,
+};
+
+/*
+ * data structure to describe a 'task' which is a short
+ * function that returns 0 as long as it needs to be
+ * called again.
+ */
+struct rxe_task {
+	struct tasklet_struct	tasklet;
+	int			state;
+	spinlock_t		state_lock; /* spinlock for task state */
+	void			*arg;
+	int			(*func)(void *arg);
+	int			ret;
+	bool			destroyed;
+};
+
+/*
+ * init rxe_task structure
+ *	arg  => parameter to pass to fcn
+ *	func => function to call until it returns != 0
+ */
+int rxe_init_task(struct rxe_task *task, void *arg, int (*func)(void *));
+
+/* cleanup task */
+void rxe_cleanup_task(struct rxe_task *task);
+
+/*
+ * raw call to func in loop without any checking
+ * can call when tasklets are disabled
+ */
+int __rxe_do_task(struct rxe_task *task);
+
+/*
+ * common function called by any of the main tasklets
+ * If there is any chance that there is additional
+ * work to do someone must reschedule the task before
+ * leaving
+ */
+void rxe_do_task(struct tasklet_struct *t);
+
+/* run a task, else schedule it to run as a tasklet, The decision
+ * to run or schedule tasklet is based on the parameter sched.
+ */
+void rxe_run_task(struct rxe_task *task, int sched);
+
+/* keep a task from scheduling */
+void rxe_disable_task(struct rxe_task *task);
+
+/* allow task to run */
+void rxe_enable_task(struct rxe_task *task);
+
+#endif /* RXE_TASK_H */