tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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 */
25extern int ctc_mpc_alloc_channel(int port,
26 void (*callback)(int port_num, int max_write_size));
27/* active open Alloc then send XID2 */
28extern void ctc_mpc_establish_connectivity(int port,
29 void (*callback)(int port_num, int rc, int max_write_size));
30
31extern void ctc_mpc_dealloc_ch(int port);
32extern 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
52struct 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
81struct 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
99struct th_addon {
100 __u32 th_last_seq;
101 __u32 th_resvd;
102} __attribute__ ((packed));
103
104struct 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
116struct 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
125struct 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
149struct 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
157struct 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
202void ctcmpc_dumpit(char *buf, int len);
203#else
204static 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 */
216void ctcmpc_dump_skb(struct sk_buff *skb, int offset);
217#else
218static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
219{}
220#endif
221
222static 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
230int ctcmpc_open(struct net_device *);
231void ctcm_ccw_check_rc(struct channel *, int, char *);
232void mpc_group_ready(unsigned long adev);
233void mpc_channel_action(struct channel *ch, int direction, int action);
234void mpc_action_send_discontact(unsigned long thischan);
235void mpc_action_discontact(fsm_instance *fi, int event, void *arg);
236void ctcmpc_bh(unsigned long thischan);
237#endif
238/* --- This is the END my friend --- */