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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright IBM Corp. 20074 * 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 interface20 * 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 */26extern int ctc_mpc_alloc_channel(int port,27 void (*callback)(int port_num, int max_write_size));28/* active open Alloc then send XID2 */29extern void ctc_mpc_establish_connectivity(int port,30 void (*callback)(int port_num, int rc, int max_write_size));31 32extern void ctc_mpc_dealloc_ch(int port);33extern void ctc_mpc_flow_control(int port, int flowc);34 35/*36 * other MPC Group prototypes and structures37 */38 39#define ETH_P_SNA_DIX 0x80D540 41/*42 * Declaration of an XID243 *44 */45#define ALLZEROS 0x000000000000000046 47#define XID_FM2 0x2048#define XID2_0 0x0049#define XID2_7 0x0750#define XID2_WRITE_SIDE 0x0451#define XID2_READ_SIDE 0x0552 53struct 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 82struct th_header {83 __u8 th_seg;84 __u8 th_ch_flag;85#define TH_HAS_PDU 0xf086#define TH_IS_XID 0x0187#define TH_SWEEP_REQ 0xfe88#define TH_SWEEP_RESP 0xff89 __u8 th_blk_flag;90#define TH_DATA_IS_XID 0x8091#define TH_RETRY 0x4092#define TH_DISCONTACT 0xc093#define TH_SEG_BLK 0x2094#define TH_LAST_SEG 0x1095#define TH_PDU_PART 0x0896 __u8 th_is_xid; /* is 0x01 if this is XID */97 __u32 th_seq_num;98} __attribute__ ((packed));99 100struct th_addon {101 __u32 th_last_seq;102 __u32 th_resvd;103} __attribute__ ((packed));104 105struct 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 0x80114#define PDU_CNTL 0x40115#define PDU_FIRST 0x20116 117struct 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 126struct qllc {127 __u8 qllc_address;128#define QLLC_REQ 0xFF129#define QLLC_RESP 0x00130 __u8 qllc_commands;131#define QLLC_DISCONNECT 0x53132#define QLLC_UNSEQACK 0x73133#define QLLC_SETMODE 0x93134#define QLLC_EXCHID 0xBF135} __attribute__ ((packed));136 137 138/*139 * Definition of one MPC group140 */141 142#define MAX_MPCGCHAN 10143#define MPC_XID_TIMEOUT_VALUE 10000144#define MPC_CHANNEL_ADD 0145#define MPC_CHANNEL_REMOVE 1146#define MPC_CHANNEL_ATTN 2147#define XSIDE 1148#define YSIDE 0149 150struct 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 158struct 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 DEBUGDATA203void ctcmpc_dumpit(char *buf, int len);204#else205static inline void ctcmpc_dumpit(char *buf, int len)206{207}208#endif209 210#ifdef DEBUGDATA211/*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 */217void ctcmpc_dump_skb(struct sk_buff *skb, int offset);218#else219static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset)220{}221#endif222 223static inline void ctcmpc_dump32(char *buf, int len)224{225 if (len < 32)226 ctcmpc_dumpit(buf, len);227 else228 ctcmpc_dumpit(buf, 32);229}230 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#endif238/* --- This is the END my friend --- */239