LXR linux/include/scsi/fc/fc

   1/*
   2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms and conditions of the GNU General Public License,
   6 * version 2, as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope it will be useful, but WITHOUT
   9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11 * more details.
  12 *
  13 * You should have received a copy of the GNU General Public License along with
  14 * this program; if not, write to the Free Software Foundation, Inc.,
  15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  16 *
  17 * Maintained at www.Open-FCoE.org
  18 */
  19
  20#ifndef _FC_FCOE_H_
  21#define _FC_FCOE_H_
  22
  23/*
  24 * FCoE - Fibre Channel over Ethernet.
  25 * See T11 FC-BB-5 Rev 2.00 (09-056v5.pdf)
  26 */
  27
  28/*
  29 * Default FC_FCOE_OUI / FC-MAP value.
  30 */
  31#define FC_FCOE_OUI     0x0efc00        /* upper 24 bits of FCOE MAC */
  32
  33/*
  34 * Fabric Login (FLOGI) MAC for non-FIP use.  Non-FIP use is deprecated.
  35 */
  36#define FC_FCOE_FLOGI_MAC { 0x0e, 0xfc, 0x00, 0xff, 0xff, 0xfe }
  37
  38#define FC_FCOE_VER     0                       /* version */
  39
  40/*
  41 * Ethernet Addresses based on FC S_ID and D_ID.
  42 * Generated by FC_FCOE_OUI | S_ID/D_ID
  43 */
  44#define FC_FCOE_ENCAPS_ID(n)    (((u64) FC_FCOE_OUI << 24) | (n))
  45#define FC_FCOE_DECAPS_ID(n)    ((n) >> 24)
  46
  47/*
  48 * FCoE frame header - 14 bytes
  49 * This follows the VLAN header, which includes the ethertype.
  50 */
  51struct fcoe_hdr {
  52        __u8            fcoe_ver;       /* version field - upper 4 bits */
  53        __u8            fcoe_resvd[12]; /* reserved - send zero and ignore */
  54        __u8            fcoe_sof;       /* start of frame per RFC 3643 */
  55};
  56
  57#define FC_FCOE_DECAPS_VER(hp)      ((hp)->fcoe_ver >> 4)
  58#define FC_FCOE_ENCAPS_VER(hp, ver) ((hp)->fcoe_ver = (ver) << 4)
  59
  60/*
  61 * FCoE CRC & EOF - 8 bytes.
  62 */
  63struct fcoe_crc_eof {
  64        __le32          fcoe_crc32;     /* CRC for FC packet */
  65        __u8            fcoe_eof;       /* EOF from RFC 3643 */
  66        __u8            fcoe_resvd[3];  /* reserved - send zero and ignore */
  67} __attribute__((packed));
  68
  69/*
  70 * Minimum FCoE + FC header length
  71 * 14 bytes FCoE header + 24 byte FC header = 38 bytes
  72 */
  73#define FCOE_HEADER_LEN 38
  74
  75/*
  76 * Minimum FCoE frame size
  77 * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
  78 */
  79#define FCOE_MIN_FRAME 46
  80
  81/*
  82 * FCoE Link Error Status Block: T11 FC-BB-5 Rev2.0, Clause 7.10.
  83 */
  84struct fcoe_fc_els_lesb {
  85        __be32          lesb_link_fail; /* link failure count */
  86        __be32          lesb_vlink_fail; /* virtual link failure count */
  87        __be32          lesb_miss_fka;  /* missing FIP keep-alive count */
  88        __be32          lesb_symb_err;  /* symbol error during carrier count */
  89        __be32          lesb_err_block; /* errored block count */
  90        __be32          lesb_fcs_error; /* frame check sequence error count */
  91};
  92
  93/*
  94 * fc_fcoe_set_mac - Store OUI + DID into MAC address field.
  95 * @mac: mac address to be set
  96 * @did: fc dest id to use
  97 */
  98static inline void fc_fcoe_set_mac(u8 *mac, u8 *did)
  99{
 100        mac[0] = (u8) (FC_FCOE_OUI >> 16);
 101        mac[1] = (u8) (FC_FCOE_OUI >> 8);
 102        mac[2] = (u8) FC_FCOE_OUI;
 103        mac[3] = did[0];
 104        mac[4] = did[1];
 105        mac[5] = did[2];
 106}
 107
 108#endif /* _FC_FCOE_H_ */
 109