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 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
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 static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb)
89 {
90 return (struct eth1394hdr *)skb_mac_header(skb);
91 }
92
93 typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type;
94
95 /* IP1394 headers */
96
97 /* Unfragmented */
98 #if defined __BIG_ENDIAN_BITFIELD
99 struct 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
105 struct 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
116 struct 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
125 struct 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
139 struct 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
149 struct 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
163 struct eth1394_common_hdr {
164 u16 lf:2;
165 u16 pad1:14;
166 } __attribute__((packed));
167 #elif defined __LITTLE_ENDIAN_BITFIELD
168 struct 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
176 struct eth1394_hdr_words {
177 u16 word1;
178 u16 word2;
179 u16 word3;
180 u16 word4;
181 };
182
183 union 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) */
202 struct 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. */
223 struct 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
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