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104 lines
2.8 KiB
C
104 lines
2.8 KiB
C
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/*
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* Copyright(c) 2007 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#ifndef _FC_FCOE_H_
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#define _FC_FCOE_H_
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/*
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* FCoE - Fibre Channel over Ethernet.
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*/
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/*
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* FC_FCOE_OUI hasn't been standardized yet. XXX TBD.
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*/
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#ifndef FC_FCOE_OUI
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#define FC_FCOE_OUI 0x0efc00 /* upper 24 bits of FCOE dest MAC TBD */
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#endif
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/*
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* The destination MAC address for the fabric login may get a different OUI.
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* This isn't standardized yet.
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*/
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#ifndef FC_FCOE_FLOGI_MAC
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/* gateway MAC - TBD */
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#define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }
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#endif
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#define FC_FCOE_VER 0 /* version */
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/*
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* Ethernet Addresses based on FC S_ID and D_ID.
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* Generated by FC_FCOE_OUI | S_ID/D_ID
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*/
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#define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24) | (n))
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#define FC_FCOE_DECAPS_ID(n) ((n) >> 24)
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/*
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* FCoE frame header - 14 bytes
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*
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* This is the August 2007 version of the FCoE header as defined by T11.
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* This follows the VLAN header, which includes the ethertype.
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*/
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struct fcoe_hdr {
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__u8 fcoe_ver; /* version field - upper 4 bits */
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__u8 fcoe_resvd[12]; /* reserved - send zero and ignore */
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__u8 fcoe_sof; /* start of frame per RFC 3643 */
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};
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#define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4)
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#define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)
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/*
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* FCoE CRC & EOF - 8 bytes.
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*/
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struct fcoe_crc_eof {
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__le32 fcoe_crc32; /* CRC for FC packet */
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__u8 fcoe_eof; /* EOF from RFC 3643 */
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__u8 fcoe_resvd[3]; /* reserved - send zero and ignore */
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} __attribute__((packed));
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/*
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* Minimum FCoE + FC header length
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* 14 bytes FCoE header + 24 byte FC header = 38 bytes
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*/
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#define FCOE_HEADER_LEN 38
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/*
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* Minimum FCoE frame size
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* 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
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*/
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#define FCOE_MIN_FRAME 46
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/*
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* fc_fcoe_set_mac - Store OUI + DID into MAC address field.
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* @mac: mac address to be set
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* @did: fc dest id to use
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*/
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static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
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{
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mac[0] = (u8) (FC_FCOE_OUI >> 16);
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mac[1] = (u8) (FC_FCOE_OUI >> 8);
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mac[2] = (u8) FC_FCOE_OUI;
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mac[3] = did[0];
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mac[4] = did[1];
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mac[5] = did[2];
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}
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#endif /* _FC_FCOE_H_ */
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