1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright IBM Corp. 2007
4 * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
5 *
6 * MPC additions:
7 * Belinda Thompson (belindat@us.ibm.com)
8 * Andy Richter (richtera@us.ibm.com)
9 */
10
11 #ifndef _CTC_MPC_H_
12 #define _CTC_MPC_H_
13
14 #include <linux/interrupt.h>
15 #include <linux/skbuff.h>
16 #include "fsm.h"
17
18 /*
19 * MPC external interface
20 * Note that ctc_mpc_xyz are called with a lock on ................
21 */
22
23 /* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */
24
25 /* passive open Just wait for XID2 exchange */
26 extern int ctc_mpc_alloc_channel(int port,
27 void (*callback)(int port_num, int max_write_size));
28 /* active open Alloc then send XID2 */
29 extern void ctc_mpc_establish_connectivity(int port,
30 void (*callback)(int port_num, int rc, int max_write_size));
31
32 extern void ctc_mpc_dealloc_ch(int port);
33 extern void ctc_mpc_flow_control(int port, int flowc);
34
35 /*
36 * other MPC Group prototypes and structures
37 */
38
39 #define ETH_P_SNA_DIX 0x80D5
40
41 /*
42 * Declaration of an XID2
43 *
44 */
45 #define ALLZEROS 0x0000000000000000
46
47 #define XID_FM2 0x20
48 #define XID2_0 0x00
49 #define XID2_7 0x07
50 #define XID2_WRITE_SIDE 0x04
51 #define XID2_READ_SIDE 0x05
52
53 struct xid2 {
54 __u8 xid2_type_id;
55 __u8 xid2_len;
56 __u32 xid2_adj_id;
57 __u8 xid2_rlen;
58 __u8 xid2_resv1;
59 __u8 xid2_flag1;
60 __u8 xid2_fmtt;
61 __u8 xid2_flag4;
62 __u16 xid2_resv2;
63 __u8 xid2_tgnum;
64 __u32 xid2_sender_id;
65 __u8 xid2_flag2;
66 __u8 xid2_option;
67 char xid2_resv3[8];
68 __u16 xid2_resv4;
69 __u8 xid2_dlc_type;
70 __u16 xid2_resv5;
71 __u8 xid2_mpc_flag;
72 __u8 xid2_resv6;
73 __u16 xid2_buf_len;
74 char xid2_buffer[255 - (13 * sizeof(__u8) +
75 2 * sizeof(__u32) +
76 4 * sizeof(__u16) +
77 8 * sizeof(char))];
78 } __attribute__ ((packed));
79
80 #define XID2_LENGTH (sizeof(struct xid2))
81
82 struct th_header {
83 __u8 th_seg;
84 __u8 th_ch_flag;
85 #define TH_HAS_PDU 0xf0
86 #define TH_IS_XID 0x01
87 #define TH_SWEEP_REQ 0xfe
88 #define TH_SWEEP_RESP 0xff
89 __u8 th_blk_flag;
90 #define TH_DATA_IS_XID 0x80
91 #define TH_RETRY 0x40
92 #define TH_DISCONTACT 0xc0
93 #define TH_SEG_BLK 0x20
94 #define TH_LAST_SEG 0x10
95 #define TH_PDU_PART 0x08
96 __u8 th_is_xid; /* is 0x01 if this is XID */
97 __u32 th_seq_num;
98 } __attribute__ ((packed));
99
100 struct th_addon {
101 __u32 th_last_seq;
102 __u32 th_resvd;
103 } __attribute__ ((packed));
104
105 struct th_sweep {
106 struct th_header th;
107 struct th_addon sw;
108 } __attribute__ ((packed));
109
110 #define TH_HEADER_LENGTH (sizeof(struct th_header))
111 #define TH_SWEEP_LENGTH (sizeof(struct th_sweep))
112
113 #define PDU_LAST 0x80
114 #define PDU_CNTL 0x40
115 #define PDU_FIRST 0x20
116
117 struct pdu {
118 __u32 pdu_offset;
119 __u8 pdu_flag;
120 __u8 pdu_proto; /* 0x01 is APPN SNA */
121 __u16 pdu_seq;
122 } __attribute__ ((packed));
123
124 #define PDU_HEADER_LENGTH (sizeof(struct pdu))
125
126 struct qllc {
127 __u8 qllc_address;
128 #define QLLC_REQ 0xFF
129 #define QLLC_RESP 0x00
130 __u8 qllc_commands;
131 #define QLLC_DISCONNECT 0x53
132 #define QLLC_UNSEQACK 0x73
133 #define QLLC_SETMODE 0x93
134 #define QLLC_EXCHID 0xBF
135 } __attribute__ ((packed));
136
137
138 /*
139 * Definition of one MPC group
140 */
141
142 #define MAX_MPCGCHAN 10
143 #define MPC_XID_TIMEOUT_VALUE 10000
144 #define MPC_CHANNEL_ADD 0
145 #define MPC_CHANNEL_REMOVE 1
146 #define MPC_CHANNEL_ATTN 2
147 #define XSIDE 1
148 #define YSIDE 0
149
150 struct mpcg_info {
151 struct sk_buff *skb;
152 struct channel *ch;
153 struct xid2 *xid;
154 struct th_sweep *sweep;
155 struct th_header *th;
156 };
157
158 struct mpc_group {
159 struct tasklet_struct mpc_tasklet;
160 struct tasklet_struct mpc_tasklet2;
161 int changed_side;
162 int saved_state;
163 int channels_terminating;
164 int out_of_sequence;
165 int flow_off_called;
166 int port_num;
167 int port_persist;
168 int alloc_called;
169 __u32 xid2_adj_id;
170 __u8 xid2_tgnum;
171 __u32 xid2_sender_id;
172 int num_channel_paths;
173 int active_channels[2];
174 __u16 group_max_buflen;
175 int outstanding_xid2;
176 int outstanding_xid7;
177 int outstanding_xid7_p2;
178 int sweep_req_pend_num;
179 int sweep_rsp_pend_num;
180 struct sk_buff *xid_skb;
181 char *xid_skb_data;
182 struct th_header *xid_th;
183 struct xid2 *xid;
184 char *xid_id;
185 struct th_header *rcvd_xid_th;
186 struct sk_buff *rcvd_xid_skb;
187 char *rcvd_xid_data;
188 __u8 in_sweep;
189 __u8 roll;
190 struct xid2 *saved_xid2;
191 void (*allochanfunc)(int, int);
192 int allocchan_callback_retries;
193 void (*estconnfunc)(int, int, int);
194 int estconn_callback_retries;
195 int estconn_called;
196 int xidnogood;
197 int send_qllc_disc;
198 fsm_timer timer;
199 fsm_instance *fsm; /* group xid fsm */
200 };
201
202 #ifdef DEBUGDATA
203 void ctcmpc_dumpit(char *buf, int len);
204 #else
ctcmpc_dumpit(char * buf,int len)205 static inline void ctcmpc_dumpit(char *buf, int len)
206 {
207 }
208 #endif
209
210 #ifdef DEBUGDATA
211 /*
212 * Dump header and first 16 bytes of an sk_buff for debugging purposes.
213 *
214 * skb The struct sk_buff to dump.
215 * offset Offset relative to skb-data, where to start the dump.
216 */
217 void ctcmpc_dump_skb(struct sk_buff *skb, int offset);
218 #else
ctcmpc_dump_skb(struct sk_buff * skb,int offset)219 static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
220 {}
221 #endif
222
ctcmpc_dump32(char * buf,int len)223 static inline void ctcmpc_dump32(char *buf, int len)
224 {
225 if (len < 32)
226 ctcmpc_dumpit(buf, len);
227 else
228 ctcmpc_dumpit(buf, 32);
229 }
230
231 int ctcmpc_open(struct net_device *);
232 void ctcm_ccw_check_rc(struct channel *, int, char *);
233 void mpc_group_ready(unsigned long adev);
234 void mpc_channel_action(struct channel *ch, int direction, int action);
235 void mpc_action_send_discontact(unsigned long thischan);
236 void mpc_action_discontact(fsm_instance *fi, int event, void *arg);
237 void ctcmpc_bh(unsigned long thischan);
238 #endif
239 /* --- This is the END my friend --- */
240