1 /* 2 * drivers/s390/net/ctcm_mpc.h 3 * 4 * Copyright IBM Corp. 2007 5 * Authors: Peter Tiedemann (ptiedem@de.ibm.com) 6 * 7 * MPC additions: 8 * Belinda Thompson (belindat@us.ibm.com) 9 * Andy Richter (richtera@us.ibm.com) 10 */ 11 12 #ifndef _CTC_MPC_H_ 13 #define _CTC_MPC_H_ 14 15 #include <linux/interrupt.h> 16 #include <linux/skbuff.h> 17 #include "fsm.h" 18 19 /* 20 * MPC external interface 21 * Note that ctc_mpc_xyz are called with a lock on ................ 22 */ 23 24 /* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */ 25 26 /* passive open Just wait for XID2 exchange */ 27 extern int ctc_mpc_alloc_channel(int port, 28 void (*callback)(int port_num, int max_write_size)); 29 /* active open Alloc then send XID2 */ 30 extern void ctc_mpc_establish_connectivity(int port, 31 void (*callback)(int port_num, int rc, int max_write_size)); 32 33 extern void ctc_mpc_dealloc_ch(int port); 34 extern void ctc_mpc_flow_control(int port, int flowc); 35 36 /* 37 * other MPC Group prototypes and structures 38 */ 39 40 #define ETH_P_SNA_DIX 0x80D5 41 42 /* 43 * Declaration of an XID2 44 * 45 */ 46 #define ALLZEROS 0x0000000000000000 47 48 #define XID_FM2 0x20 49 #define XID2_0 0x00 50 #define XID2_7 0x07 51 #define XID2_WRITE_SIDE 0x04 52 #define XID2_READ_SIDE 0x05 53 54 struct xid2 { 55 __u8 xid2_type_id; 56 __u8 xid2_len; 57 __u32 xid2_adj_id; 58 __u8 xid2_rlen; 59 __u8 xid2_resv1; 60 __u8 xid2_flag1; 61 __u8 xid2_fmtt; 62 __u8 xid2_flag4; 63 __u16 xid2_resv2; 64 __u8 xid2_tgnum; 65 __u32 xid2_sender_id; 66 __u8 xid2_flag2; 67 __u8 xid2_option; 68 char xid2_resv3[8]; 69 __u16 xid2_resv4; 70 __u8 xid2_dlc_type; 71 __u16 xid2_resv5; 72 __u8 xid2_mpc_flag; 73 __u8 xid2_resv6; 74 __u16 xid2_buf_len; 75 char xid2_buffer[255 - (13 * sizeof(__u8) + 76 2 * sizeof(__u32) + 77 4 * sizeof(__u16) + 78 8 * sizeof(char))]; 79 } __attribute__ ((packed)); 80 81 #define XID2_LENGTH (sizeof(struct xid2)) 82 83 struct th_header { 84 __u8 th_seg; 85 __u8 th_ch_flag; 86 #define TH_HAS_PDU 0xf0 87 #define TH_IS_XID 0x01 88 #define TH_SWEEP_REQ 0xfe 89 #define TH_SWEEP_RESP 0xff 90 __u8 th_blk_flag; 91 #define TH_DATA_IS_XID 0x80 92 #define TH_RETRY 0x40 93 #define TH_DISCONTACT 0xc0 94 #define TH_SEG_BLK 0x20 95 #define TH_LAST_SEG 0x10 96 #define TH_PDU_PART 0x08 97 __u8 th_is_xid; /* is 0x01 if this is XID */ 98 __u32 th_seq_num; 99 } __attribute__ ((packed)); 100 101 struct th_addon { 102 __u32 th_last_seq; 103 __u32 th_resvd; 104 } __attribute__ ((packed)); 105 106 struct th_sweep { 107 struct th_header th; 108 struct th_addon sw; 109 } __attribute__ ((packed)); 110 111 #define TH_HEADER_LENGTH (sizeof(struct th_header)) 112 #define TH_SWEEP_LENGTH (sizeof(struct th_sweep)) 113 114 #define PDU_LAST 0x80 115 #define PDU_CNTL 0x40 116 #define PDU_FIRST 0x20 117 118 struct pdu { 119 __u32 pdu_offset; 120 __u8 pdu_flag; 121 __u8 pdu_proto; /* 0x01 is APPN SNA */ 122 __u16 pdu_seq; 123 } __attribute__ ((packed)); 124 125 #define PDU_HEADER_LENGTH (sizeof(struct pdu)) 126 127 struct qllc { 128 __u8 qllc_address; 129 #define QLLC_REQ 0xFF 130 #define QLLC_RESP 0x00 131 __u8 qllc_commands; 132 #define QLLC_DISCONNECT 0x53 133 #define QLLC_UNSEQACK 0x73 134 #define QLLC_SETMODE 0x93 135 #define QLLC_EXCHID 0xBF 136 } __attribute__ ((packed)); 137 138 139 /* 140 * Definition of one MPC group 141 */ 142 143 #define MAX_MPCGCHAN 10 144 #define MPC_XID_TIMEOUT_VALUE 10000 145 #define MPC_CHANNEL_ADD 0 146 #define MPC_CHANNEL_REMOVE 1 147 #define MPC_CHANNEL_ATTN 2 148 #define XSIDE 1 149 #define YSIDE 0 150 151 struct mpcg_info { 152 struct sk_buff *skb; 153 struct channel *ch; 154 struct xid2 *xid; 155 struct th_sweep *sweep; 156 struct th_header *th; 157 }; 158 159 struct mpc_group { 160 struct tasklet_struct mpc_tasklet; 161 struct tasklet_struct mpc_tasklet2; 162 int changed_side; 163 int saved_state; 164 int channels_terminating; 165 int out_of_sequence; 166 int flow_off_called; 167 int port_num; 168 int port_persist; 169 int alloc_called; 170 __u32 xid2_adj_id; 171 __u8 xid2_tgnum; 172 __u32 xid2_sender_id; 173 int num_channel_paths; 174 int active_channels[2]; 175 __u16 group_max_buflen; 176 int outstanding_xid2; 177 int outstanding_xid7; 178 int outstanding_xid7_p2; 179 int sweep_req_pend_num; 180 int sweep_rsp_pend_num; 181 struct sk_buff *xid_skb; 182 char *xid_skb_data; 183 struct th_header *xid_th; 184 struct xid2 *xid; 185 char *xid_id; 186 struct th_header *rcvd_xid_th; 187 struct sk_buff *rcvd_xid_skb; 188 char *rcvd_xid_data; 189 __u8 in_sweep; 190 __u8 roll; 191 struct xid2 *saved_xid2; 192 void (*allochanfunc)(int, int); 193 int allocchan_callback_retries; 194 void (*estconnfunc)(int, int, int); 195 int estconn_callback_retries; 196 int estconn_called; 197 int xidnogood; 198 int send_qllc_disc; 199 fsm_timer timer; 200 fsm_instance *fsm; /* group xid fsm */ 201 }; 202 203 #ifdef DEBUGDATA 204 void ctcmpc_dumpit(char *buf, int len); 205 #else 206 static inline void ctcmpc_dumpit(char *buf, int len) 207 { 208 } 209 #endif 210 211 #ifdef DEBUGDATA 212 /* 213 * Dump header and first 16 bytes of an sk_buff for debugging purposes. 214 * 215 * skb The struct sk_buff to dump. 216 * offset Offset relative to skb-data, where to start the dump. 217 */ 218 void ctcmpc_dump_skb(struct sk_buff *skb, int offset); 219 #else 220 static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset) 221 {} 222 #endif 223 224 static inline void ctcmpc_dump32(char *buf, int len) 225 { 226 if (len < 32) 227 ctcmpc_dumpit(buf, len); 228 else 229 ctcmpc_dumpit(buf, 32); 230 } 231 232 int ctcmpc_open(struct net_device *); 233 void ctcm_ccw_check_rc(struct channel *, int, char *); 234 void mpc_group_ready(unsigned long adev); 235 void mpc_channel_action(struct channel *ch, int direction, int action); 236 void mpc_action_send_discontact(unsigned long thischan); 237 void mpc_action_discontact(fsm_instance *fi, int event, void *arg); 238 void ctcmpc_bh(unsigned long thischan); 239 #endif 240 /* --- This is the END my friend --- */ 241