1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 2007
4 * Authors: Peter Tiedemann (ptiedem@de.ibm.com)
7 * Belinda Thompson (belindat@us.ibm.com)
8 * Andy Richter (richtera@us.ibm.com)
14 #include <linux/interrupt.h>
15 #include <linux/skbuff.h>
19 * MPC external interface
20 * Note that ctc_mpc_xyz are called with a lock on ................
23 /* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */
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));
32 extern void ctc_mpc_dealloc_ch(int port);
33 extern void ctc_mpc_flow_control(int port, int flowc);
36 * other MPC Group prototypes and structures
39 #define ETH_P_SNA_DIX 0x80D5
42 * Declaration of an XID2
45 #define ALLZEROS 0x0000000000000000
50 #define XID2_WRITE_SIDE 0x04
51 #define XID2_READ_SIDE 0x05
74 char xid2_buffer[255 - (13 * sizeof(__u8) +
78 } __attribute__ ((packed));
80 #define XID2_LENGTH (sizeof(struct xid2))
85 #define TH_HAS_PDU 0xf0
86 #define TH_IS_XID 0x01
87 #define TH_SWEEP_REQ 0xfe
88 #define TH_SWEEP_RESP 0xff
90 #define TH_DATA_IS_XID 0x80
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 */
98 } __attribute__ ((packed));
103 } __attribute__ ((packed));
108 } __attribute__ ((packed));
110 #define TH_HEADER_LENGTH (sizeof(struct th_header))
111 #define TH_SWEEP_LENGTH (sizeof(struct th_sweep))
113 #define PDU_LAST 0x80
114 #define PDU_CNTL 0x40
115 #define PDU_FIRST 0x20
120 __u8 pdu_proto; /* 0x01 is APPN SNA */
122 } __attribute__ ((packed));
124 #define PDU_HEADER_LENGTH (sizeof(struct pdu))
128 #define QLLC_REQ 0xFF
129 #define QLLC_RESP 0x00
131 #define QLLC_DISCONNECT 0x53
132 #define QLLC_UNSEQACK 0x73
133 #define QLLC_SETMODE 0x93
134 #define QLLC_EXCHID 0xBF
135 } __attribute__ ((packed));
139 * Definition of one MPC group
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
154 struct th_sweep *sweep;
155 struct th_header *th;
159 struct tasklet_struct mpc_tasklet;
160 struct tasklet_struct mpc_tasklet2;
163 int channels_terminating;
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;
182 struct th_header *xid_th;
185 struct th_header *rcvd_xid_th;
186 struct sk_buff *rcvd_xid_skb;
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;
199 fsm_instance *fsm; /* group xid fsm */
203 void ctcmpc_dumpit(char *buf, int len);
205 static inline void ctcmpc_dumpit(char *buf, int len)
212 * Dump header and first 16 bytes of an sk_buff for debugging purposes.
214 * skb The struct sk_buff to dump.
215 * offset Offset relative to skb-data, where to start the dump.
217 void ctcmpc_dump_skb(struct sk_buff *skb, int offset);
219 static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)
223 static inline void ctcmpc_dump32(char *buf, int len)
226 ctcmpc_dumpit(buf, len);
228 ctcmpc_dumpit(buf, 32);
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);
238 /* --- This is the END my friend --- */