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
  29 #include "ieee1394.h"
  30
  31 /* Register for incoming packets. This is 4096 bytes, which supports up to
  32  * S3200 (per Table 16-3 of IEEE 1394b-2002). */
  33 #define ETHER1394_REGION_ADDR_LEN       4096
  34
  35 /* GASP identifier numbers for IPv4 over IEEE 1394 */
  36 #define ETHER1394_GASP_SPECIFIER_ID     0x00005E
  37 #define ETHER1394_GASP_SPECIFIER_ID_HI  ((ETHER1394_GASP_SPECIFIER_ID >> 8) & 0xffff)
  38 #define ETHER1394_GASP_SPECIFIER_ID_LO  (ETHER1394_GASP_SPECIFIER_ID & 0xff)
  39 #define ETHER1394_GASP_VERSION          1
  40
  41 #define ETHER1394_GASP_OVERHEAD (2 * sizeof(quadlet_t))  /* GASP header overhead */
  42
  43 #define ETHER1394_GASP_BUFFERS 16
  44
  45 /* rawiso buffer size - due to a limitation in rawiso, we must limit each
  46  * GASP buffer to be less than PAGE_SIZE. */
  47 #define ETHER1394_ISO_BUF_SIZE  ETHER1394_GASP_BUFFERS *                        \
  48                                    min((unsigned int)PAGE_SIZE,                 \
  49                                        2 * (1U << (priv->host->csr.max_rec + 1)))
  50
  51 /* Node set == 64 */
  52 #define NODE_SET                        (ALL_NODES + 1)
  53
  54 enum eth1394_bc_states { ETHER1394_BC_ERROR,
  55                          ETHER1394_BC_RUNNING,
  56                          ETHER1394_BC_STOPPED };
  57
  58
  59 /* Private structure for our ethernet driver */
  60 struct eth1394_priv {
  61         struct net_device_stats stats;  /* Device stats                  */
  62         struct hpsb_host *host;         /* The card for this dev         */
  63         u16 bc_maxpayload;              /* Max broadcast payload         */
  64         u8 bc_sspd;                     /* Max broadcast speed           */
  65         u64 local_fifo;                 /* Local FIFO Address            */
  66         spinlock_t lock;                /* Private lock                  */
  67         int broadcast_channel;          /* Async stream Broadcast Channel */
  68         enum eth1394_bc_states bc_state; /* broadcast channel state      */
  69         struct hpsb_iso *iso;           /* Async stream recv handle      */
  70         int bc_dgl;                     /* Outgoing broadcast datagram label */
  71         struct list_head ip_node_list;  /* List of IP capable nodes      */
  72         struct unit_directory *ud_list[ALL_NODES]; /* Cached unit dir list */
  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
  83 struct eth1394hdr {
  84         unsigned char   h_dest[ETH1394_ALEN];   /* destination eth1394 addr     */
  85         unsigned short  h_proto;                /* packet type ID field */
  86 }  __attribute__((packed));
  87
  88 #ifdef __KERNEL__
  89 #include <linux/skbuff.h>
  90
  91 static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
  92 {
  93         return (struct eth1394hdr *)skb->mac.raw;
  94 }
  95 #endif
  96
  97 typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
  98
  99 /* IP1394 headers */
 100 #include <asm/byteorder.h>
 101
 102 /* Unfragmented */
 103 #if defined __BIG_ENDIAN_BITFIELD
 104 struct eth1394_uf_hdr {
 105         u16 lf:2;
 106         u16 res:14;
 107         u16 ether_type;         /* Ethernet packet type */
 108 } __attribute__((packed));
 109 #elif defined __LITTLE_ENDIAN_BITFIELD
 110 struct eth1394_uf_hdr {
 111         u16 res:14;
 112         u16 lf:2;
 113         u16 ether_type;
 114 } __attribute__((packed));
 115 #else
 116 #error Unknown bit field type
 117 #endif
 118
 119 /* First fragment */
 120 #if defined __BIG_ENDIAN_BITFIELD
 121 struct eth1394_ff_hdr {
 122         u16 lf:2;
 123         u16 res1:2;
 124         u16 dg_size:12;         /* Datagram size */
 125         u16 ether_type;         /* Ethernet packet type */
 126         u16 dgl;                /* Datagram label */
 127         u16 res2;
 128 } __attribute__((packed));
 129 #elif defined __LITTLE_ENDIAN_BITFIELD
 130 struct eth1394_ff_hdr {
 131         u16 dg_size:12;
 132         u16 res1:2;
 133         u16 lf:2;
 134         u16 ether_type;
 135         u16 dgl;
 136         u16 res2;
 137 } __attribute__((packed));
 138 #else
 139 #error Unknown bit field type
 140 #endif
 141
 142 /* XXX: Subsequent fragments, including last */
 143 #if defined __BIG_ENDIAN_BITFIELD
 144 struct eth1394_sf_hdr {
 145         u16 lf:2;
 146         u16 res1:2;
 147         u16 dg_size:12;         /* Datagram size */
 148         u16 res2:4;
 149         u16 fg_off:12;          /* Fragment offset */
 150         u16 dgl;                /* Datagram label */
 151         u16 res3;
 152 } __attribute__((packed));
 153 #elif defined __LITTLE_ENDIAN_BITFIELD
 154 struct eth1394_sf_hdr {
 155         u16 dg_size:12;
 156         u16 res1:2;
 157         u16 lf:2;
 158         u16 fg_off:12;
 159         u16 res2:4;
 160         u16 dgl;
 161         u16 res3;
 162 } __attribute__((packed));
 163 #else
 164 #error Unknown bit field type
 165 #endif
 166
 167 #if defined __BIG_ENDIAN_BITFIELD
 168 struct eth1394_common_hdr {
 169         u16 lf:2;
 170         u16 pad1:14;
 171 } __attribute__((packed));
 172 #elif defined __LITTLE_ENDIAN_BITFIELD
 173 struct eth1394_common_hdr {
 174         u16 pad1:14;
 175         u16 lf:2;
 176 } __attribute__((packed));
 177 #else
 178 #error Unknown bit field type
 179 #endif
 180
 181 struct eth1394_hdr_words {
 182         u16 word1;
 183         u16 word2;
 184         u16 word3;
 185         u16 word4;
 186 };
 187
 188 union eth1394_hdr {
 189         struct eth1394_common_hdr common;
 190         struct eth1394_uf_hdr uf;
 191         struct eth1394_ff_hdr ff;
 192         struct eth1394_sf_hdr sf;
 193         struct eth1394_hdr_words words;
 194 };
 195
 196 /* End of IP1394 headers */
 197
 198 /* Fragment types */
 199 #define ETH1394_HDR_LF_UF       0       /* unfragmented         */
 200 #define ETH1394_HDR_LF_FF       1       /* first fragment       */
 201 #define ETH1394_HDR_LF_LF       2       /* last fragment        */
 202 #define ETH1394_HDR_LF_IF       3       /* interior fragment    */
 203
 204 #define IP1394_HW_ADDR_LEN      16      /* As per RFC           */
 205
 206 /* Our arp packet (ARPHRD_IEEE1394) */
 207 struct eth1394_arp {
 208         u16 hw_type;            /* 0x0018       */
 209         u16 proto_type;         /* 0x0806       */
 210         u8 hw_addr_len;         /* 16           */
 211         u8 ip_addr_len;         /* 4            */
 212         u16 opcode;             /* ARP Opcode   */
 213         /* Above is exactly the same format as struct arphdr */
 214
 215         u64 s_uniq_id;          /* Sender's 64bit EUI                   */
 216         u8 max_rec;             /* Sender's max packet size             */
 217         u8 sspd;                /* Sender's max speed                   */
 218         u16 fifo_hi;            /* hi 16bits of sender's FIFO addr      */
 219         u32 fifo_lo;            /* lo 32bits of sender's FIFO addr      */
 220         u32 sip;                /* Sender's IP Address                  */
 221         u32 tip;                /* IP Address of requested hw addr      */
 222 };
 223
 224 /* Network timeout */
 225 #define ETHER1394_TIMEOUT       100000
 226
 227 /* This is our task struct. It's used for the packet complete callback.  */
 228 struct packet_task {
 229         struct sk_buff *skb;
 230         int outstanding_pkts;
 231         eth1394_tx_type tx_type;
 232         int max_payload;
 233         struct hpsb_packet *packet;
 234         struct eth1394_priv *priv;
 235         union eth1394_hdr hdr;
 236         u64 addr;
 237         u16 dest_node;
 238 };
 239
 240 #endif /* __ETH1394_H */