summaryrefslogtreecommitdiff
path: root/drivers/ieee1394/eth1394.h
blob: 4f3e2dd46f0049c52211b589d2623a8053fcd9e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
/*
 * 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 <linux/skbuff.h>
#include <asm/byteorder.h>

#include "ieee1394.h"
#include "ieee1394_types.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	((0x00005E >> 8) & 0xffff)
#define ETHER1394_GASP_SPECIFIER_ID_LO	(0x00005E & 0xff)
#define ETHER1394_GASP_VERSION		1

#define ETHER1394_GASP_OVERHEAD	(2 * sizeof(quadlet_t))	/* for GASP header */

#define ETHER1394_GASP_BUFFERS	16

#define NODE_SET		(ALL_NODES + 1)		/* Node set == 64 */

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 */

	struct work_struct wake;	/* Wake up after xmit failure	 */
	struct net_device *wake_dev;	/* Stupid backlink for .wake	 */
	nodeid_t wake_node;		/* Destination of failed xmit	 */
};


/* 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));

static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
{
	return (struct eth1394hdr *)skb_mac_header(skb);
}

typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;

/* IP1394 headers */

/* 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 */