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1da177e4 LT |
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 | #define ETHER1394_INVALID_ADDR ~0ULL | |
36 | ||
37 | /* GASP identifier numbers for IPv4 over IEEE 1394 */ | |
38 | #define ETHER1394_GASP_SPECIFIER_ID 0x00005E | |
39 | #define ETHER1394_GASP_SPECIFIER_ID_HI ((ETHER1394_GASP_SPECIFIER_ID >> 8) & 0xffff) | |
40 | #define ETHER1394_GASP_SPECIFIER_ID_LO (ETHER1394_GASP_SPECIFIER_ID & 0xff) | |
41 | #define ETHER1394_GASP_VERSION 1 | |
42 | ||
43 | #define ETHER1394_GASP_OVERHEAD (2 * sizeof(quadlet_t)) /* GASP header overhead */ | |
44 | ||
45 | #define ETHER1394_GASP_BUFFERS 16 | |
46 | ||
47 | /* Node set == 64 */ | |
48 | #define NODE_SET (ALL_NODES + 1) | |
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 | ||
71 | ||
72 | /* Define a fake hardware header format for the networking core. Note that | |
73 | * header size cannot exceed 16 bytes as that is the size of the header cache. | |
74 | * Also, we do not need the source address in the header so we omit it and | |
75 | * keep the header to under 16 bytes */ | |
76 | #define ETH1394_ALEN (8) | |
77 | #define ETH1394_HLEN (10) | |
78 | ||
79 | struct eth1394hdr { | |
80 | unsigned char h_dest[ETH1394_ALEN]; /* destination eth1394 addr */ | |
81 | unsigned short h_proto; /* packet type ID field */ | |
82 | } __attribute__((packed)); | |
83 | ||
84 | #ifdef __KERNEL__ | |
85 | #include <linux/skbuff.h> | |
86 | ||
87 | static inline struct eth1394hdr *eth1394_hdr(const struct sk_buff *skb) | |
88 | { | |
89 | return (struct eth1394hdr *)skb->mac.raw; | |
90 | } | |
91 | #endif | |
92 | ||
93 | typedef enum {ETH1394_GASP, ETH1394_WRREQ} eth1394_tx_type; | |
94 | ||
95 | /* IP1394 headers */ | |
96 | #include <asm/byteorder.h> | |
97 | ||
98 | /* Unfragmented */ | |
99 | #if defined __BIG_ENDIAN_BITFIELD | |
100 | struct eth1394_uf_hdr { | |
101 | u16 lf:2; | |
102 | u16 res:14; | |
103 | u16 ether_type; /* Ethernet packet type */ | |
104 | } __attribute__((packed)); | |
105 | #elif defined __LITTLE_ENDIAN_BITFIELD | |
106 | struct eth1394_uf_hdr { | |
107 | u16 res:14; | |
108 | u16 lf:2; | |
109 | u16 ether_type; | |
110 | } __attribute__((packed)); | |
111 | #else | |
112 | #error Unknown bit field type | |
113 | #endif | |
114 | ||
115 | /* First fragment */ | |
116 | #if defined __BIG_ENDIAN_BITFIELD | |
117 | struct eth1394_ff_hdr { | |
118 | u16 lf:2; | |
119 | u16 res1:2; | |
120 | u16 dg_size:12; /* Datagram size */ | |
121 | u16 ether_type; /* Ethernet packet type */ | |
122 | u16 dgl; /* Datagram label */ | |
123 | u16 res2; | |
124 | } __attribute__((packed)); | |
125 | #elif defined __LITTLE_ENDIAN_BITFIELD | |
126 | struct eth1394_ff_hdr { | |
127 | u16 dg_size:12; | |
128 | u16 res1:2; | |
129 | u16 lf:2; | |
130 | u16 ether_type; | |
131 | u16 dgl; | |
132 | u16 res2; | |
133 | } __attribute__((packed)); | |
134 | #else | |
135 | #error Unknown bit field type | |
136 | #endif | |
137 | ||
138 | /* XXX: Subsequent fragments, including last */ | |
139 | #if defined __BIG_ENDIAN_BITFIELD | |
140 | struct eth1394_sf_hdr { | |
141 | u16 lf:2; | |
142 | u16 res1:2; | |
143 | u16 dg_size:12; /* Datagram size */ | |
144 | u16 res2:4; | |
145 | u16 fg_off:12; /* Fragment offset */ | |
146 | u16 dgl; /* Datagram label */ | |
147 | u16 res3; | |
148 | } __attribute__((packed)); | |
149 | #elif defined __LITTLE_ENDIAN_BITFIELD | |
150 | struct eth1394_sf_hdr { | |
151 | u16 dg_size:12; | |
152 | u16 res1:2; | |
153 | u16 lf:2; | |
154 | u16 fg_off:12; | |
155 | u16 res2:4; | |
156 | u16 dgl; | |
157 | u16 res3; | |
158 | } __attribute__((packed)); | |
159 | #else | |
160 | #error Unknown bit field type | |
161 | #endif | |
162 | ||
163 | #if defined __BIG_ENDIAN_BITFIELD | |
164 | struct eth1394_common_hdr { | |
165 | u16 lf:2; | |
166 | u16 pad1:14; | |
167 | } __attribute__((packed)); | |
168 | #elif defined __LITTLE_ENDIAN_BITFIELD | |
169 | struct eth1394_common_hdr { | |
170 | u16 pad1:14; | |
171 | u16 lf:2; | |
172 | } __attribute__((packed)); | |
173 | #else | |
174 | #error Unknown bit field type | |
175 | #endif | |
176 | ||
177 | struct eth1394_hdr_words { | |
178 | u16 word1; | |
179 | u16 word2; | |
180 | u16 word3; | |
181 | u16 word4; | |
182 | }; | |
183 | ||
184 | union eth1394_hdr { | |
185 | struct eth1394_common_hdr common; | |
186 | struct eth1394_uf_hdr uf; | |
187 | struct eth1394_ff_hdr ff; | |
188 | struct eth1394_sf_hdr sf; | |
189 | struct eth1394_hdr_words words; | |
190 | }; | |
191 | ||
192 | /* End of IP1394 headers */ | |
193 | ||
194 | /* Fragment types */ | |
195 | #define ETH1394_HDR_LF_UF 0 /* unfragmented */ | |
196 | #define ETH1394_HDR_LF_FF 1 /* first fragment */ | |
197 | #define ETH1394_HDR_LF_LF 2 /* last fragment */ | |
198 | #define ETH1394_HDR_LF_IF 3 /* interior fragment */ | |
199 | ||
200 | #define IP1394_HW_ADDR_LEN 16 /* As per RFC */ | |
201 | ||
202 | /* Our arp packet (ARPHRD_IEEE1394) */ | |
203 | struct eth1394_arp { | |
204 | u16 hw_type; /* 0x0018 */ | |
205 | u16 proto_type; /* 0x0806 */ | |
206 | u8 hw_addr_len; /* 16 */ | |
207 | u8 ip_addr_len; /* 4 */ | |
208 | u16 opcode; /* ARP Opcode */ | |
209 | /* Above is exactly the same format as struct arphdr */ | |
210 | ||
211 | u64 s_uniq_id; /* Sender's 64bit EUI */ | |
212 | u8 max_rec; /* Sender's max packet size */ | |
213 | u8 sspd; /* Sender's max speed */ | |
214 | u16 fifo_hi; /* hi 16bits of sender's FIFO addr */ | |
215 | u32 fifo_lo; /* lo 32bits of sender's FIFO addr */ | |
216 | u32 sip; /* Sender's IP Address */ | |
217 | u32 tip; /* IP Address of requested hw addr */ | |
218 | }; | |
219 | ||
220 | /* Network timeout */ | |
221 | #define ETHER1394_TIMEOUT 100000 | |
222 | ||
223 | /* This is our task struct. It's used for the packet complete callback. */ | |
224 | struct packet_task { | |
225 | struct sk_buff *skb; | |
226 | int outstanding_pkts; | |
227 | eth1394_tx_type tx_type; | |
228 | int max_payload; | |
229 | struct hpsb_packet *packet; | |
230 | struct eth1394_priv *priv; | |
231 | union eth1394_hdr hdr; | |
232 | u64 addr; | |
233 | u16 dest_node; | |
234 | }; | |
235 | ||
236 | #endif /* __ETH1394_H */ |