Merge branch 'master' into tk71

[mv-sheeva.git] / drivers / net / bna / bfa_wc.h

diff --git a/drivers/net/bna/bfa_wc.h b/drivers/net/bna/bfa_wc.h
new file mode 100644 (file)
index 0000000..d0e4cae
--- /dev/null
+++ b/drivers/net/bna/bfa_wc.h
@@ -0,0 +1,69 @@
+/*
+ * Linux network driver for Brocade Converged Network 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.
+ */
+/*
+ * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ */
+
+/**
+ * @file 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 {
+       bfa_wc_resume_t wc_resume;
+       void            *wc_cbarg;
+       int             wc_count;
+};
+
+static inline void
+bfa_wc_up(struct bfa_wc *wc)
+{
+       wc->wc_count++;
+}
+
+static inline void
+bfa_wc_down(struct bfa_wc *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 *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 *wc)
+{
+       bfa_wc_down(wc);
+}
+
+#endif