1 /*
2 * Copyright IBM Corp. 2007
3 * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
4 *
5 * MPC additions:
6 * Belinda Thompson (belindat@us.ibm.com)
7 * Andy Richter (richtera@us.ibm.com)
8 */
9
10 #ifndef _CTC_MPC_H_
11 #define _CTC_MPC_H_
12
13 #include <linux/interrupt.h>
14 #include <linux/skbuff.h>
15 #include "fsm.h"
16
17 /*
18 * MPC external interface
19 * Note that ctc_mpc_xyz are called with a lock on ................
20 */
21
22 /* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */
23
24 /* passive open Just wait for XID2 exchange */
25 extern int ctc_mpc_alloc_channel(int port,
26 void (*callback)(int port_num, int max_write_size));
27 /* active open Alloc then send XID2 */
28 extern void ctc_mpc_establish_connectivity(int port,
29 void (*callback)(int port_num, int rc, int max_write_size));
30
31 extern void ctc_mpc_dealloc_ch(int port);
32 extern void ctc_mpc_flow_control(int port, int flowc);
33
34 /*
35 * other MPC Group prototypes and structures
36 */
37
38 #define ETH_P_SNA_DIX 0x80D5
39
40 /*
41 * Declaration of an XID2
42 *
43 */
44 #define ALLZEROS 0x0000000000000000
45
46 #define XID_FM2 0x20
47 #define XID2_0 0x00
48 #define XID2_7 0x07
49 #define XID2_WRITE_SIDE 0x04
50 #define XID2_READ_SIDE 0x05
51
52 struct xid2 {
53 __u8 xid2_type_id;
54 __u8 xid2_len;
55 __u32 xid2_adj_id;
56 __u8 xid2_rlen;
57 __u8 xid2_resv1;
58 __u8 xid2_flag1;
59 __u8 xid2_fmtt;
60 __u8 xid2_flag4;
61 __u16 xid2_resv2;
62 __u8 xid2_tgnum;
63 __u32 xid2_sender_id;
64 __u8 xid2_flag2;
65 __u8 xid2_option;
66 char xid2_resv3[8];
67 __u16 xid2_resv4;
68 __u8 xid2_dlc_type;
69 __u16 xid2_resv5;
70 __u8 xid2_mpc_flag;
71 __u8 xid2_resv6;
72 __u16 xid2_buf_len;
73 char xid2_buffer[255 - (13 * sizeof(__u8) +
74 2 * sizeof(__u32) +
75 4 * sizeof(__u16) +
76 8 * sizeof(char))];
77 } __attribute__ ((packed));
78
79 #define XID2_LENGTH (sizeof(struct xid2))
80
81 struct th_header {
82 __u8 th_seg;
83 __u8 th_ch_flag;
84 #define TH_HAS_PDU 0xf0
85 #define TH_IS_XID 0x01
86 #define TH_SWEEP_REQ 0xfe
87 #define TH_SWEEP_RESP 0xff
88 __u8 th_blk_flag;
89 #define TH_DATA_IS_XID 0x80
90 #define TH_RETRY 0x40
91 #define TH_DISCONTACT 0xc0
92 #define TH_SEG_BLK 0x20
93 #define TH_LAST_SEG 0x10
94 #define TH_PDU_PART 0x08
95 __u8 th_is_xid; /* is 0x01 if this is XID */
96 __u32 th_seq_num;
97 } __attribute__ ((packed));
98
99 struct th_addon {
100 __u32 th_last_seq;
101 __u32 th_resvd;
102 } __attribute__ ((packed));
103
104 struct th_sweep {
105 struct th_header th;
106 struct th_addon sw;
107 } __attribute__ ((packed));
108
109 #define TH_HEADER_LENGTH (sizeof(struct th_header))
110 #define TH_SWEEP_LENGTH (sizeof(struct th_sweep))
111
112 #define PDU_LAST 0x80
113 #define PDU_CNTL 0x40
114 #define PDU_FIRST 0x20
115
116 struct pdu {
117 __u32 pdu_offset;
118 __u8 pdu_flag;
119 __u8 pdu_proto; /* 0x01 is APPN SNA */
120 __u16 pdu_seq;
121 } __attribute__ ((packed));
122
123 #define PDU_HEADER_LENGTH (sizeof(struct pdu))
124
125 struct qllc {
126 __u8 qllc_address;
127 #define QLLC_REQ 0xFF
128 #define QLLC_RESP 0x00
129 __u8 qllc_commands;
130 #define QLLC_DISCONNECT 0x53
131 #define QLLC_UNSEQACK 0x73
132 #define QLLC_SETMODE 0x93
133 #define QLLC_EXCHID 0xBF
134 } __attribute__ ((packed));
135
136
137 /*
138 * Definition of one MPC group
139 */
140
141 #define MAX_MPCGCHAN 10
142 #define MPC_XID_TIMEOUT_VALUE 10000
143 #define MPC_CHANNEL_ADD 0
144 #define MPC_CHANNEL_REMOVE 1
145 #define MPC_CHANNEL_ATTN 2
146 #define XSIDE 1
147 #define YSIDE 0
148
149 struct mpcg_info {
150 struct sk_buff *skb;
151 struct channel *ch;
152 struct xid2 *xid;
153 struct th_sweep *sweep;
154 struct th_header *th;
155 };
156
157 struct mpc_group {
158 struct tasklet_struct mpc_tasklet;
159 struct tasklet_struct mpc_tasklet2;
160 int changed_side;
161 int saved_state;
162 int channels_terminating;
163 int out_of_sequence;
164 int flow_off_called;
165 int port_num;
166 int port_persist;
167 int alloc_called;
168 __u32 xid2_adj_id;
169 __u8 xid2_tgnum;
170 __u32 xid2_sender_id;
171 int num_channel_paths;
172 int active_channels[2];
173 __u16 group_max_buflen;
174 int outstanding_xid2;
175 int outstanding_xid7;
176 int outstanding_xid7_p2;
177 int sweep_req_pend_num;
178 int sweep_rsp_pend_num;
179 struct sk_buff *xid_skb;
180 char *xid_skb_data;
181 struct th_header *xid_th;
182 struct xid2 *xid;
183 char *xid_id;
184 struct th_header *rcvd_xid_th;
185 struct sk_buff *rcvd_xid_skb;
186 char *rcvd_xid_data;
187 __u8 in_sweep;
188 __u8 roll;
189 struct xid2 *saved_xid2;
190 void (*allochanfunc)(int, int);
191 int allocchan_callback_retries;
192 void (*estconnfunc)(int, int, int);
193 int estconn_callback_retries;
194 int estconn_called;
195 int xidnogood;
196 int send_qllc_disc;
197 fsm_timer timer;
198 fsm_instance *fsm; /* group xid fsm */
199 };
200
201 #ifdef DEBUGDATA
202 void ctcmpc_dumpit(char *buf, int len);
203 #else
ctcmpc_dumpit(char * buf,int len)204 static inline void ctcmpc_dumpit(char *buf, int len)
205 {
206 }
207 #endif
208
209 #ifdef DEBUGDATA
210 /*
211 * Dump header and first 16 bytes of an sk_buff for debugging purposes.
212 *
213 * skb The struct sk_buff to dump.
214 * offset Offset relative to skb-data, where to start the dump.
215 */
216 void ctcmpc_dump_skb(struct sk_buff *skb, int offset);
217 #else
ctcmpc_dump_skb(struct sk_buff * skb,int offset)218 static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
219 {}
220 #endif
221
ctcmpc_dump32(char * buf,int len)222 static inline void ctcmpc_dump32(char *buf, int len)
223 {
224 if (len < 32)
225 ctcmpc_dumpit(buf, len);
226 else
227 ctcmpc_dumpit(buf, 32);
228 }
229
230 int ctcmpc_open(struct net_device *);
231 void ctcm_ccw_check_rc(struct channel *, int, char *);
232 void mpc_group_ready(unsigned long adev);
233 void mpc_channel_action(struct channel *ch, int direction, int action);
234 void mpc_action_send_discontact(unsigned long thischan);
235 void mpc_action_discontact(fsm_instance *fi, int event, void *arg);
236 void ctcmpc_bh(unsigned long thischan);
237 #endif
238 /* --- This is the END my friend --- */
239