1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/include/cs/bfa_wc.h b/drivers/scsi/bfa/include/cs/bfa_wc.h
new file mode 100644
index 000000000000..0460bd4fc7c4
--- /dev/null
+++ b/drivers/scsi/bfa/include/cs/bfa_wc.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+/**
+ *  bfa_wc.h Generic wait counter.
+ */
+
+#ifndef __BFA_WC_H__
+#define __BFA_WC_H__
+
+typedef void (*bfa_wc_resume_t) (void *cbarg);
+
+struct bfa_wc_s {
+	bfa_wc_resume_t wc_resume;
+	void		*wc_cbarg;
+	int		wc_count;
+};
+
+static inline void
+bfa_wc_up(struct bfa_wc_s *wc)
+{
+	wc->wc_count++;
+}
+
+static inline void
+bfa_wc_down(struct bfa_wc_s *wc)
+{
+	wc->wc_count--;
+	if (wc->wc_count == 0)
+		wc->wc_resume(wc->wc_cbarg);
+}
+
+/**
+ * Initialize a waiting counter.
+ */
+static inline void
+bfa_wc_init(struct bfa_wc_s *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg)
+{
+	wc->wc_resume = wc_resume;
+	wc->wc_cbarg = wc_cbarg;
+	wc->wc_count = 0;
+	bfa_wc_up(wc);
+}
+
+/**
+ * Wait for counter to reach zero
+ */
+static inline void
+bfa_wc_wait(struct bfa_wc_s *wc)
+{
+	bfa_wc_down(wc);
+}
+
+#endif