Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
ctcm_mpc.h
Go to the documentation of this file.
1 /*
2  * Copyright IBM Corp. 2007
3  * Authors: Peter Tiedemann ([email protected])
4  *
5  * MPC additions:
6  * Belinda Thompson ([email protected])
7  * Andy Richter ([email protected])
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 {
66  char xid2_resv3[8];
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 {
84 #define TH_HAS_PDU 0xf0
85 #define TH_IS_XID 0x01
86 #define TH_SWEEP_REQ 0xfe
87 #define TH_SWEEP_RESP 0xff
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 */
97 } __attribute__ ((packed));
98 
99 struct th_addon {
102 } __attribute__ ((packed));
104 struct th_sweep {
105  struct th_header th;
106  struct th_addon sw;
107 } __attribute__ ((packed));
109 #define TH_HEADER_LENGTH (sizeof(struct th_header))
110 #define TH_SWEEP_LENGTH (sizeof(struct th_sweep))
112 #define PDU_LAST 0x80
113 #define PDU_CNTL 0x40
114 #define PDU_FIRST 0x20
115 
116 struct pdu {
119  __u8 pdu_proto; /* 0x01 is APPN SNA */
121 } __attribute__ ((packed));
123 #define PDU_HEADER_LENGTH (sizeof(struct pdu))
125 struct qllc {
127 #define QLLC_REQ 0xFF
128 #define QLLC_RESP 0x00
130 #define QLLC_DISCONNECT 0x53
131 #define QLLC_UNSEQACK 0x73
132 #define QLLC_SETMODE 0x93
133 #define QLLC_EXCHID 0xBF
134 } __attribute__ ((packed));
137 /*
138  * Definition of one MPC group
139  */
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 {
165  int port_num;
179  struct sk_buff *xid_skb;
181  struct th_header *xid_th;
182  struct xid2 *xid;
183  char *xid_id;
189  struct xid2 *saved_xid2;
198  fsm_instance *fsm; /* group xid fsm */
199 };
200 
201 #ifdef DEBUGDATA
202 void ctcmpc_dumpit(char *buf, int len);
203 #else
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
218 static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
219 {}
220 #endif
221 
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 --- */