--- /dev/null
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License"). See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership. You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*-
+ * Copyright (c) 2010 David Malone <dwmalone@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef CEPH_MSG_TOEPLITZ_H_
+#define CEPH_MSG_TOEPLITZ_H_
+
+#include <vector>
+
+using rss_key_type = std::vector<uint8_t>;
+
+// Mellanox Linux's driver key
+static const rss_key_type default_rsskey_40bytes = {
+ 0xd1, 0x81, 0xc6, 0x2c, 0xf7, 0xf4, 0xdb, 0x5b,
+ 0x19, 0x83, 0xa2, 0xfc, 0x94, 0x3e, 0x1a, 0xdb,
+ 0xd9, 0x38, 0x9e, 0x6b, 0xd1, 0x03, 0x9c, 0x2c,
+ 0xa7, 0x44, 0x99, 0xad, 0x59, 0x3d, 0x56, 0xd9,
+ 0xf3, 0x25, 0x3c, 0x06, 0x2a, 0xdc, 0x1f, 0xfc
+};
+
+// Intel's i40e PMD default RSS key
+static const rss_key_type default_rsskey_52bytes = {
+ 0x44, 0x39, 0x79, 0x6b, 0xb5, 0x4c, 0x50, 0x23,
+ 0xb6, 0x75, 0xea, 0x5b, 0x12, 0x4f, 0x9f, 0x30,
+ 0xb8, 0xa2, 0xc0, 0x3d, 0xdf, 0xdc, 0x4d, 0x02,
+ 0xa0, 0x8c, 0x9b, 0x33, 0x4a, 0xf6, 0x4a, 0x4c,
+ 0x05, 0xc6, 0xfa, 0x34, 0x39, 0x58, 0xd8, 0x55,
+ 0x7d, 0x99, 0x58, 0x3a, 0xe1, 0x38, 0xc9, 0x2e,
+ 0x81, 0x15, 0x03, 0x66
+};
+
+template<typename T>
+static inline uint32_t toeplitz_hash(const rss_key_type& key, const T& data)
+{
+ uint32_t hash = 0, v;
+ u_int i, b;
+
+ /* XXXRW: Perhaps an assertion about key length vs. data length? */
+
+ v = (key[0]<<24) + (key[1]<<16) + (key[2] <<8) + key[3];
+ for (i = 0; i < data.size(); i++) {
+ for (b = 0; b < 8; b++) {
+ if (data[i] & (1<<(7-b)))
+ hash ^= v;
+ v <<= 1;
+ if ((i + 4) < key.size() &&
+ (key[i+4] & (1<<(7-b))))
+ v |= 1;
+ }
+ }
+ return (hash);
+}
+#endif
Code Review / stor4nfv.git / blobdiff