drivers/ieee1394/eth1394.h

   1 /*
   2  * eth1394.h -- Ethernet driver for Linux IEEE-1394 Subsystem
   3  *
   4  * Copyright (C) 2000 Bonin Franck <boninf@free.fr>
   5  *           (C) 2001 Ben Collins <bcollins@debian.org>
   6  *
   7  * Mainly based on work by Emanuel Pirker and Andreas E. Bombe
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 #ifndef __ETH1394_H
  25 #define __ETH1394_H
  26
  27 #include <linux/netdevice.h>
  28 #include <linux/skbuff.h>
  29 #include <asm/byteorder.h>
  30
  31 #include "ieee1394.h"
  32 #include "ieee1394_types.h"
  33
  34 /* Register for incoming packets. This is 4096 bytes, which supports up to
  35  * S3200 (per Table 16-3 of IEEE 1394b-2002). */
  36 #define ETHER1394_REGION_ADDR_LEN       4096
  37
  38 /* GASP identifier numbers for IPv4 over IEEE 1394 */
  39 #define ETHER1394_GASP_SPECIFIER_ID     0x00005E
  40 #define ETHER1394_GASP_SPECIFIER_ID_HI  ((0x00005E >> 8) & 0xffff)
  41 #define ETHER1394_GASP_SPECIFIER_ID_LO  (0x00005E & 0xff)
  42 #define ETHER1394_GASP_VERSION          1
  43
  44 #define ETHER1394_GASP_OVERHEAD (2 * sizeof(quadlet_t)) /* for GASP header */
  45
  46 #define ETHER1394_GASP_BUFFERS  16
  47
  48 #define NODE_SET                (ALL_NODES + 1)         /* Node set == 64 */
  49
  50 enum eth1394_bc_states { ETHER1394_BC_ERROR,
  51                          ETHER1394_BC_RUNNING,
  52                          ETHER1394_BC_STOPPED };
  53
  54
  55 /* Private structure for our ethernet driver */
  56 struct eth1394_priv {
  57         struct hpsb_host *host;         /* The card for this dev         */
  58         u16 bc_maxpayload;              /* Max broadcast payload         */
  59         u8 bc_sspd;                     /* Max broadcast speed           */
  60         u64 local_fifo;                 /* Local FIFO Address            */
  61         spinlock_t lock;                /* Private lock                  */
  62         int broadcast_channel;          /* Async stream Broadcast Channel */
  63         enum eth1394_bc_states bc_state; /* broadcast channel state      */
  64         struct hpsb_iso *iso;           /* Async stream recv handle      */
  65         int bc_dgl;                     /* Outgoing broadcast datagram label */
  66         struct list_head ip_node_list;  /* List of IP capable nodes      */
  67         struct unit_directory *ud_list[ALL_NODES]; /* Cached unit dir list */
  68
  69         struct work_struct wake;        /* Wake up after xmit failure    */
  70         struct net_device *wake_dev;    /* Stupid backlink for .wake     */
  71         nodeid_t wake_node;             /* Destination of failed xmit    */
  72 };
  73
  74
  75 /* Define a fake hardware header format for the networking core.  Note that
  76  * header size cannot exceed 16 bytes as that is the size of the header cache.
  77  * Also, we do not need the source address in the header so we omit it and
  78  * keep the header to under 16 bytes */
  79 #define ETH1394_ALEN (8)
  80 #define ETH1394_HLEN (10)
  81
  82 struct eth1394hdr {
  83         unsigned char   h_dest[ETH1394_ALEN];   /* destination eth1394 addr     */
  84         __be16          h_proto;                /* packet type ID field */
  85 }  __attribute__((packed));
  86
  87 static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
  88 {
  89         return (struct eth1394hdr *)skb_mac_header(skb);
  90 }
  91
  92 typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
  93
  94 /* IP1394 headers */
  95
  96 /* Unfragmented */
  97 #if defined __BIG_ENDIAN_BITFIELD
  98 struct eth1394_uf_hdr {
  99         u16 lf:2;
 100         u16 res:14;
 101         __be16 ether_type;              /* Ethernet packet type */
 102 } __attribute__((packed));
 103 #elif defined __LITTLE_ENDIAN_BITFIELD
 104 struct eth1394_uf_hdr {
 105         u16 res:14;
 106         u16 lf:2;
 107         __be16 ether_type;
 108 } __attribute__((packed));
 109 #else
 110 #error Unknown bit field type
 111 #endif
 112
 113 /* First fragment */
 114 #if defined __BIG_ENDIAN_BITFIELD
 115 struct eth1394_ff_hdr {
 116         u16 lf:2;
 117         u16 res1:2;
 118         u16 dg_size:12;         /* Datagram size */
 119         __be16 ether_type;              /* Ethernet packet type */
 120         u16 dgl;                /* Datagram label */
 121         u16 res2;
 122 } __attribute__((packed));
 123 #elif defined __LITTLE_ENDIAN_BITFIELD
 124 struct eth1394_ff_hdr {
 125         u16 dg_size:12;
 126         u16 res1:2;
 127         u16 lf:2;
 128         __be16 ether_type;
 129         u16 dgl;
 130         u16 res2;
 131 } __attribute__((packed));
 132 #else
 133 #error Unknown bit field type
 134 #endif
 135
 136 /* XXX: Subsequent fragments, including last */
 137 #if defined __BIG_ENDIAN_BITFIELD
 138 struct eth1394_sf_hdr {
 139         u16 lf:2;
 140         u16 res1:2;
 141         u16 dg_size:12;         /* Datagram size */
 142         u16 res2:4;
 143         u16 fg_off:12;          /* Fragment offset */
 144         u16 dgl;                /* Datagram label */
 145         u16 res3;
 146 } __attribute__((packed));
 147 #elif defined __LITTLE_ENDIAN_BITFIELD
 148 struct eth1394_sf_hdr {
 149         u16 dg_size:12;
 150         u16 res1:2;
 151         u16 lf:2;
 152         u16 fg_off:12;
 153         u16 res2:4;
 154         u16 dgl;
 155         u16 res3;
 156 } __attribute__((packed));
 157 #else
 158 #error Unknown bit field type
 159 #endif
 160
 161 #if defined __BIG_ENDIAN_BITFIELD
 162 struct eth1394_common_hdr {
 163         u16 lf:2;
 164         u16 pad1:14;
 165 } __attribute__((packed));
 166 #elif defined __LITTLE_ENDIAN_BITFIELD
 167 struct eth1394_common_hdr {
 168         u16 pad1:14;
 169         u16 lf:2;
 170 } __attribute__((packed));
 171 #else
 172 #error Unknown bit field type
 173 #endif
 174
 175 struct eth1394_hdr_words {
 176         u16 word1;
 177         u16 word2;
 178         u16 word3;
 179         u16 word4;
 180 };
 181
 182 union eth1394_hdr {
 183         struct eth1394_common_hdr common;
 184         struct eth1394_uf_hdr uf;
 185         struct eth1394_ff_hdr ff;
 186         struct eth1394_sf_hdr sf;
 187         struct eth1394_hdr_words words;
 188 };
 189
 190 /* End of IP1394 headers */
 191
 192 /* Fragment types */
 193 #define ETH1394_HDR_LF_UF       0       /* unfragmented         */
 194 #define ETH1394_HDR_LF_FF       1       /* first fragment       */
 195 #define ETH1394_HDR_LF_LF       2       /* last fragment        */
 196 #define ETH1394_HDR_LF_IF       3       /* interior fragment    */
 197
 198 #define IP1394_HW_ADDR_LEN      16      /* As per RFC           */
 199
 200 /* Our arp packet (ARPHRD_IEEE1394) */
 201 struct eth1394_arp {
 202         u16 hw_type;            /* 0x0018       */
 203         u16 proto_type;         /* 0x0806       */
 204         u8 hw_addr_len;         /* 16           */
 205         u8 ip_addr_len;         /* 4            */
 206         u16 opcode;             /* ARP Opcode   */
 207         /* Above is exactly the same format as struct arphdr */
 208
 209         __be64 s_uniq_id;       /* Sender's 64bit EUI           */
 210         u8 max_rec;             /* Sender's max packet size             */
 211         u8 sspd;                /* Sender's max speed                   */
 212         __be16 fifo_hi;         /* hi 16bits of sender's FIFO addr      */
 213         __be32 fifo_lo;         /* lo 32bits of sender's FIFO addr      */
 214         u32 sip;                /* Sender's IP Address                  */
 215         u32 tip;                /* IP Address of requested hw addr      */
 216 };
 217
 218 /* Network timeout */
 219 #define ETHER1394_TIMEOUT       100000
 220
 221 /* This is our task struct. It's used for the packet complete callback.  */
 222 struct packet_task {
 223         struct sk_buff *skb;
 224         int outstanding_pkts;
 225         eth1394_tx_type tx_type;
 226         int max_payload;
 227         struct hpsb_packet *packet;
 228         struct eth1394_priv *priv;
 229         union eth1394_hdr hdr;
 230         u64 addr;
 231         u16 dest_node;
 232 };
 233
 234 #endif /* __ETH1394_H */