1 files changed, 65 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/crc32.h b/drivers/net/ethernet/netronome/nfp/nfpcore/crc32.h
new file mode 100644
index 000000000000..6cee6382deb4
--- /dev/null
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/crc32.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2015-2017 Netronome Systems, Inc.
+ *
+ * This software is dual licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree or the BSD 2-Clause License provided below.  You have the
+ * option to license this software under the complete terms of either license.
+ *
+ * The BSD 2-Clause License:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      1. Redistributions of source code must retain the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer.
+ *
+ *      2. Redistributions in binary form must reproduce the above
+ *         copyright notice, this list of conditions and the following
+ *         disclaimer in the documentation and/or other materials
+ *         provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef NFP_CRC32_H
+#define NFP_CRC32_H
+
+#include <linux/kernel.h>
+#include <linux/crc32.h>
+
+/**
+ * crc32_posix_end() - Finalize POSIX CRC32 working state
+ * @crc:	Current CRC32 working state
+ * @total_len:	Total length of data that was CRC32'd
+ *
+ * Return: Final POSIX CRC32 value
+ */
+static inline u32 crc32_posix_end(u32 crc, size_t total_len)
+{
+	/* Extend with the length of the string. */
+	while (total_len != 0) {
+		u8 c = total_len & 0xff;
+
+		crc = crc32_be(crc, &c, 1);
+		total_len >>= 8;
+	}
+
+	return ~crc;
+}
+
+static inline u32 crc32_posix(const void *buff, size_t len)
+{
+	return crc32_posix_end(crc32_be(0, buff, len), len);
+}
+
+#endif /* NFP_CRC32_H */