linux_kernel/drivers/infiniband/hw/usnic/usnic_common_util.h

/*
 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - 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 USNIC_CMN_UTIL_H
#define USNIC_CMN_UTIL_H

static inline void
usnic_mac_to_gid(const char *const mac, char *raw_gid)
{
	raw_gid[0] = 0xfe;
	raw_gid[1] = 0x80;
	memset(&raw_gid[2], 0, 6);
	raw_gid[8] = mac[0]^2;
	raw_gid[9] = mac[1];
	raw_gid[10] = mac[2];
	raw_gid[11] = 0xff;
	raw_gid[12] = 0xfe;
	raw_gid[13] = mac[3];
	raw_gid[14] = mac[4];
	raw_gid[15] = mac[5];
}

static inline void
usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid)
{
	raw_gid[0] = 0xfe;
	raw_gid[1] = 0x80;
	memset(&raw_gid[2], 0, 2);
	memcpy(&raw_gid[4], &inaddr, 4);
	raw_gid[8] = mac[0]^2;
	raw_gid[9] = mac[1];
	raw_gid[10] = mac[2];
	raw_gid[11] = 0xff;
	raw_gid[12] = 0xfe;
	raw_gid[13] = mac[3];
	raw_gid[14] = mac[4];
	raw_gid[15] = mac[5];
}

static inline void
usnic_write_gid_if_id_from_mac(char *mac, char *raw_gid)
{
	raw_gid[8] = mac[0]^2;
	raw_gid[9] = mac[1];
	raw_gid[10] = mac[2];
	raw_gid[11] = 0xff;
	raw_gid[12] = 0xfe;
	raw_gid[13] = mac[3];
	raw_gid[14] = mac[4];
	raw_gid[15] = mac[5];
}

#endif /* USNIC_COMMON_UTIL_H */