linux/drivers/ieee1394/eth1394.h
<<
>>
Prefs
   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
  50enum eth1394_bc_states { ETHER1394_BC_ERROR,
  51                         ETHER1394_BC_RUNNING,
  52                         ETHER1394_BC_STOPPED };
  53
  54
  55/* Private structure for our ethernet driver */
  56struct eth1394_priv {
  57        struct net_device_stats stats;  /* Device stats                  */
  58        struct hpsb_host *host;         /* The card for this dev         */
  59        u16 bc_maxpayload;              /* Max broadcast payload         */
  60        u8 bc_sspd;                     /* Max broadcast speed           */
  61        u64 local_fifo;                 /* Local FIFO Address            */
  62        spinlock_t lock;                /* Private lock                  */
  63        int broadcast_channel;          /* Async stream Broadcast Channel */
  64        enum eth1394_bc_states bc_state; /* broadcast channel state      */
  65        struct hpsb_iso *iso;           /* Async stream recv handle      */
  66        int bc_dgl;                     /* Outgoing broadcast datagram label */
  67        struct list_head ip_node_list;  /* List of IP capable nodes      */
  68        struct unit_directory *ud_list[ALL_NODES]; /* Cached unit dir list */
  69
  70        struct work_struct wake;        /* Wake up after xmit failure    */
  71        struct net_device *wake_dev;    /* Stupid backlink for .wake     */
  72        nodeid_t wake_node;             /* Destination of failed xmit    */
  73};
  74
  75
  76/* Define a fake hardware header format for the networking core.  Note that
  77 * header size cannot exceed 16 bytes as that is the size of the header cache.
  78 * Also, we do not need the source address in the header so we omit it and
  79 * keep the header to under 16 bytes */
  80#define ETH1394_ALEN (8)
  81#define ETH1394_HLEN (10)
  82
  83struct eth1394hdr {
  84        unsigned char   h_dest[ETH1394_ALEN];   /* destination eth1394 addr     */
  85        unsigned short  h_proto;                /* packet type ID field */
  86}  __attribute__((packed));
  87
  88static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
  89{
  90        return (struct eth1394hdr *)skb_mac_header(skb);
  91}
  92
  93typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
  94
  95/* IP1394 headers */
  96
  97/* Unfragmented */
  98#if defined __BIG_ENDIAN_BITFIELD
  99struct eth1394_uf_hdr {
 100        u16 lf:2;
 101        u16 res:14;
 102        u16 ether_type;         /* Ethernet packet type */
 103} __attribute__((packed));
 104#elif defined __LITTLE_ENDIAN_BITFIELD
 105struct eth1394_uf_hdr {
 106        u16 res:14;
 107        u16 lf:2;
 108        u16 ether_type;
 109} __attribute__((packed));
 110#else
 111#error Unknown bit field type
 112#endif
 113
 114/* First fragment */
 115#if defined __BIG_ENDIAN_BITFIELD
 116struct eth1394_ff_hdr {
 117        u16 lf:2;
 118        u16 res1:2;
 119        u16 dg_size:12;         /* Datagram size */
 120        u16 ether_type;         /* Ethernet packet type */
 121        u16 dgl;                /* Datagram label */
 122        u16 res2;
 123} __attribute__((packed));
 124#elif defined __LITTLE_ENDIAN_BITFIELD
 125struct eth1394_ff_hdr {
 126        u16 dg_size:12;
 127        u16 res1:2;
 128        u16 lf:2;
 129        u16 ether_type;
 130        u16 dgl;
 131        u16 res2;
 132} __attribute__((packed));
 133#else
 134#error Unknown bit field type
 135#endif
 136
 137/* XXX: Subsequent fragments, including last */
 138#if defined __BIG_ENDIAN_BITFIELD
 139struct eth1394_sf_hdr {
 140        u16 lf:2;
 141        u16 res1:2;
 142        u16 dg_size:12;         /* Datagram size */
 143        u16 res2:4;
 144        u16 fg_off:12;          /* Fragment offset */
 145        u16 dgl;                /* Datagram label */
 146        u16 res3;
 147} __attribute__((packed));
 148#elif defined __LITTLE_ENDIAN_BITFIELD
 149struct eth1394_sf_hdr {
 150        u16 dg_size:12;
 151        u16 res1:2;
 152        u16 lf:2;
 153        u16 fg_off:12;
 154        u16 res2:4;
 155        u16 dgl;
 156        u16 res3;
 157} __attribute__((packed));
 158#else
 159#error Unknown bit field type
 160#endif
 161
 162#if defined __BIG_ENDIAN_BITFIELD
 163struct eth1394_common_hdr {
 164        u16 lf:2;
 165        u16 pad1:14;
 166} __attribute__((packed));
 167#elif defined __LITTLE_ENDIAN_BITFIELD
 168struct eth1394_common_hdr {
 169        u16 pad1:14;
 170        u16 lf:2;
 171} __attribute__((packed));
 172#else
 173#error Unknown bit field type
 174#endif
 175
 176struct eth1394_hdr_words {
 177        u16 word1;
 178        u16 word2;
 179        u16 word3;
 180        u16 word4;
 181};
 182
 183union eth1394_hdr {
 184        struct eth1394_common_hdr common;
 185        struct eth1394_uf_hdr uf;
 186        struct eth1394_ff_hdr ff;
 187        struct eth1394_sf_hdr sf;
 188        struct eth1394_hdr_words words;
 189};
 190
 191/* End of IP1394 headers */
 192
 193/* Fragment types */
 194#define ETH1394_HDR_LF_UF       0       /* unfragmented         */
 195#define ETH1394_HDR_LF_FF       1       /* first fragment       */
 196#define ETH1394_HDR_LF_LF       2       /* last fragment        */
 197#define ETH1394_HDR_LF_IF       3       /* interior fragment    */
 198
 199#define IP1394_HW_ADDR_LEN      16      /* As per RFC           */
 200
 201/* Our arp packet (ARPHRD_IEEE1394) */
 202struct eth1394_arp {
 203        u16 hw_type;            /* 0x0018       */
 204        u16 proto_type;         /* 0x0806       */
 205        u8 hw_addr_len;         /* 16           */
 206        u8 ip_addr_len;         /* 4            */
 207        u16 opcode;             /* ARP Opcode   */
 208        /* Above is exactly the same format as struct arphdr */
 209
 210        u64 s_uniq_id;          /* Sender's 64bit EUI                   */
 211        u8 max_rec;             /* Sender's max packet size             */
 212        u8 sspd;                /* Sender's max speed                   */
 213        u16 fifo_hi;            /* hi 16bits of sender's FIFO addr      */
 214        u32 fifo_lo;            /* lo 32bits of sender's FIFO addr      */
 215        u32 sip;                /* Sender's IP Address                  */
 216        u32 tip;                /* IP Address of requested hw addr      */
 217};
 218
 219/* Network timeout */
 220#define ETHER1394_TIMEOUT       100000
 221
 222/* This is our task struct. It's used for the packet complete callback.  */
 223struct packet_task {
 224        struct sk_buff *skb;
 225        int outstanding_pkts;
 226        eth1394_tx_type tx_type;
 227        int max_payload;
 228        struct hpsb_packet *packet;
 229        struct eth1394_priv *priv;
 230        union eth1394_hdr hdr;
 231        u64 addr;
 232        u16 dest_node;
 233};
 234
 235#endif /* __ETH1394_H */
 236