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/*
* eth1394.h -- Ethernet driver for Linux IEEE-1394 Subsystem
*
* Copyright (C) 2000 Bonin Franck <boninf@free.fr>
* (C) 2001 Ben Collins <bcollins@debian.org>
*
* Mainly based on work by Emanuel Pirker and Andreas E. Bombe
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __ETH1394_H
#define __ETH1394_H
#include <linux/netdevice.h>
#include "ieee1394.h"
/* Register for incoming packets. This is 4096 bytes, which supports up to
* S3200 (per Table 16-3 of IEEE 1394b-2002). */
#define ETHER1394_REGION_ADDR_LEN 4096
/* GASP identifier numbers for IPv4 over IEEE 1394 */
#define ETHER1394_GASP_SPECIFIER_ID 0x00005E
#define ETHER1394_GASP_SPECIFIER_ID_HI ((ETHER1394_GASP_SPECIFIER_ID >> 8) & 0xffff)
#define ETHER1394_GASP_SPECIFIER_ID_LO (ETHER1394_GASP_SPECIFIER_ID & 0xff)
#define ETHER1394_GASP_VERSION 1
#define ETHER1394_GASP_OVERHEAD (2 * sizeof(quadlet_t)) /* GASP header overhead */
#define ETHER1394_GASP_BUFFERS 16
/* rawiso buffer size - due to a limitation in rawiso, we must limit each
* GASP buffer to be less than PAGE_SIZE. */
#define ETHER1394_ISO_BUF_SIZE ETHER1394_GASP_BUFFERS * \
min((unsigned int)PAGE_SIZE, \
2 * (1U << (priv->host->csr.max_rec + 1)))
/* Node set == 64 */
#define NODE_SET (ALL_NODES + 1)
enum eth1394_bc_states { ETHER1394_BC_ERROR,
ETHER1394_BC_RUNNING,
ETHER1394_BC_STOPPED };
/* Private structure for our ethernet driver */
struct eth1394_priv {
struct net_device_stats stats; /* Device stats */
struct hpsb_host *host; /* The card for this dev */
u16 bc_maxpayload; /* Max broadcast payload */
u8 bc_sspd; /* Max broadcast speed */
u64 local_fifo; /* Local FIFO Address */
spinlock_t lock; /* Private lock */
int broadcast_channel; /* Async stream Broadcast Channel */
enum eth1394_bc_states bc_state; /* broadcast channel state */
struct hpsb_iso *iso; /* Async stream recv handle */
int bc_dgl; /* Outgoing broadcast datagram label */
struct list_head ip_node_list; /* List of IP capable nodes */
struct unit_directory *ud_list[ALL_NODES]; /* Cached unit dir list */
};
/* Define a fake hardware header format for the networking core. Note that
* header size cannot exceed 16 bytes as that is the size of the header cache.
* Also, we do not need the source address in the header so we omit it and
* keep the header to under 16 bytes */
#define ETH1394_ALEN (8)
#define ETH1394_HLEN (10)
struct eth1394hdr {
unsigned char h_dest[ETH1394_ALEN]; /* destination eth1394 addr */
unsigned short h_proto; /* packet type ID field */
} __attribute__((packed));
#ifdef __KERNEL__
#include <linux/skbuff.h>
static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
{
return (struct eth1394hdr *)skb_mac_header(skb);
}
#endif
typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
/* IP1394 headers */
#include <asm/byteorder.h>
/* Unfragmented */
#if defined __BIG_ENDIAN_BITFIELD
struct eth1394_uf_hdr {
u16 lf:2;
u16 res:14;
u16 ether_type; /* Ethernet packet type */
} __attribute__((packed));
#elif defined __LITTLE_ENDIAN_BITFIELD
struct eth1394_uf_hdr {
u16 res:14;
u16 lf:2;
u16 ether_type;
} __attribute__((packed));
#else
#error Unknown bit field type
#endif
/* First fragment */
#if defined __BIG_ENDIAN_BITFIELD
struct eth1394_ff_hdr {
u16 lf:2;
u16 res1:2;
u16 dg_size:12; /* Datagram size */
u16 ether_type; /* Ethernet packet type */
u16 dgl; /* Datagram label */
u16 res2;
} __attribute__((packed));
#elif defined __LITTLE_ENDIAN_BITFIELD
struct eth1394_ff_hdr {
u16 dg_size:12;
u16 res1:2;
u16 lf:2;
u16 ether_type;
u16 dgl;
u16 res2;
} __attribute__((packed));
#else
#error Unknown bit field type
#endif
/* XXX: Subsequent fragments, including last */
#if defined __BIG_ENDIAN_BITFIELD
struct eth1394_sf_hdr {
u16 lf:2;
u16 res1:2;
u16 dg_size:12; /* Datagram size */
u16 res2:4;
u16 fg_off:12; /* Fragment offset */
u16 dgl; /* Datagram label */
u16 res3;
} __attribute__((packed));
#elif defined __LITTLE_ENDIAN_BITFIELD
struct eth1394_sf_hdr {
u16 dg_size:12;
u16 res1:2;
u16 lf:2;
u16 fg_off:12;
u16 res2:4;
u16 dgl;
u16 res3;
} __attribute__((packed));
#else
#error Unknown bit field type
#endif
#if defined __BIG_ENDIAN_BITFIELD
struct eth1394_common_hdr {
u16 lf:2;
u16 pad1:14;
} __attribute__((packed));
#elif defined __LITTLE_ENDIAN_BITFIELD
struct eth1394_common_hdr {
u16 pad1:14;
u16 lf:2;
} __attribute__((packed));
#else
#error Unknown bit field type
#endif
struct eth1394_hdr_words {
u16 word1;
u16 word2;
u16 word3;
u16 word4;
};
union eth1394_hdr {
struct eth1394_common_hdr common;
struct eth1394_uf_hdr uf;
struct eth1394_ff_hdr ff;
struct eth1394_sf_hdr sf;
struct eth1394_hdr_words words;
};
/* End of IP1394 headers */
/* Fragment types */
#define ETH1394_HDR_LF_UF 0 /* unfragmented */
#define ETH1394_HDR_LF_FF 1 /* first fragment */
#define ETH1394_HDR_LF_LF 2 /* last fragment */
#define ETH1394_HDR_LF_IF 3 /* interior fragment */
#define IP1394_HW_ADDR_LEN 16 /* As per RFC */
/* Our arp packet (ARPHRD_IEEE1394) */
struct eth1394_arp {
u16 hw_type; /* 0x0018 */
u16 proto_type; /* 0x0806 */
u8 hw_addr_len; /* 16 */
u8 ip_addr_len; /* 4 */
u16 opcode; /* ARP Opcode */
/* Above is exactly the same format as struct arphdr */
u64 s_uniq_id; /* Sender's 64bit EUI */
u8 max_rec; /* Sender's max packet size */
u8 sspd; /* Sender's max speed */
u16 fifo_hi; /* hi 16bits of sender's FIFO addr */
u32 fifo_lo; /* lo 32bits of sender's FIFO addr */
u32 sip; /* Sender's IP Address */
u32 tip; /* IP Address of requested hw addr */
};
/* Network timeout */
#define ETHER1394_TIMEOUT 100000
/* This is our task struct. It's used for the packet complete callback. */
struct packet_task {
struct sk_buff *skb;
int outstanding_pkts;
eth1394_tx_type tx_type;
int max_payload;
struct hpsb_packet *packet;
struct eth1394_priv *priv;
union eth1394_hdr hdr;
u64 addr;
u16 dest_node;
};
#endif /* __ETH1394_H */
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