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 --- */ 239