/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright ( c ) 2007 Intel Corporation . All rights reserved .
*
* Maintained at www . Open - FCoE . org
*/
#ifndef _FC_FCOE_H_
#define _FC_FCOE_H_
/*
* FCoE - Fibre Channel over Ethernet .
* See T11 FC - BB - 5 Rev 2 . 00 ( 09 - 056 v5 . pdf )
*/
/*
* Default FC_FCOE_OUI / FC - MAP value .
*/
#define FC_FCOE_OUI 0 x0efc00 /* upper 24 bits of FCOE MAC */
/*
* Fabric Login ( FLOGI ) MAC for non - FIP use . Non - FIP use is deprecated .
*/
#define FC_FCOE_FLOGI_MAC { 0 x0e, 0 xfc, 0 x00, 0 xff, 0 xff, 0 xfe }
#define FC_FCOE_VER 0 /* version */
/*
* Ethernet Addresses based on FC S_ID and D_ID .
* Generated by FC_FCOE_OUI | S_ID / D_ID
*/
#define FC_FCOE_ENCAPS_ID(n) (((u64) FC_FCOE_OUI << 24 ) | (n))
#define FC_FCOE_DECAPS_ID(n) ((n) >> 24 )
/*
* FCoE frame header - 14 bytes
* This follows the VLAN header , which includes the ethertype .
*/
struct fcoe_hdr {
__u8 fcoe_ver; /* version field - upper 4 bits */
__u8 fcoe_resvd[12 ]; /* reserved - send zero and ignore */
__u8 fcoe_sof; /* start of frame per RFC 3643 */
};
#define FC_FCOE_DECAPS_VER(hp) ((hp)->fcoe_ver >> 4 )
#define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4 )
/*
* FCoE CRC & EOF - 8 bytes .
*/
struct fcoe_crc_eof {
__le32 fcoe_crc32; /* CRC for FC packet */
__u8 fcoe_eof; /* EOF from RFC 3643 */
__u8 fcoe_resvd[3 ]; /* reserved - send zero and ignore */
} __attribute__((packed));
/*
* Minimum FCoE + FC header length
* 14 bytes FCoE header + 24 byte FC header = 38 bytes
*/
#define FCOE_HEADER_LEN 38
/*
* Minimum FCoE frame size
* 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
*/
#define FCOE_MIN_FRAME 46
/*
* FCoE Link Error Status Block : T11 FC - BB - 5 Rev2 . 0 , Clause 7 . 10 .
*/
struct fcoe_fc_els_lesb {
__be32 lesb_link_fail; /* link failure count */
__be32 lesb_vlink_fail; /* virtual link failure count */
__be32 lesb_miss_fka; /* missing FIP keep-alive count */
__be32 lesb_symb_err; /* symbol error during carrier count */
__be32 lesb_err_block; /* errored block count */
__be32 lesb_fcs_error; /* frame check sequence error count */
};
/*
* fc_fcoe_set_mac - Store OUI + DID into MAC address field .
* @ mac : mac address to be set
* @ did : fc dest id to use
*/
static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
{
mac[0 ] = (u8) (FC_FCOE_OUI >> 16 );
mac[1 ] = (u8) (FC_FCOE_OUI >> 8 );
mac[2 ] = (u8) FC_FCOE_OUI;
mac[3 ] = did[0 ];
mac[4 ] = did[1 ];
mac[5 ] = did[2 ];
}
#endif /* _FC_FCOE_H_ */
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