/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright IBM Corp. 2007 * Authors: Peter Tiedemann (ptiedem@de.ibm.com) * * MPC additions: * Belinda Thompson (belindat@us.ibm.com) * Andy Richter (richtera@us.ibm.com) */ #ifndef _CTC_MPC_H_ #define _CTC_MPC_H_ #include <linux/interrupt.h> #include <linux/skbuff.h> #include "fsm.h" /* * MPC external interface * Note that ctc_mpc_xyz are called with a lock on ................ */ /* port_number is the mpc device 0, 1, 2 etc mpc2 is port_number 2 */ /* passive open Just wait for XID2 exchange */ extern int ctc_mpc_alloc_channel(int port, void (*callback)(int port_num, int max_write_size)); /* active open Alloc then send XID2 */ extern void ctc_mpc_establish_connectivity(int port, void (*callback)(int port_num, int rc, int max_write_size)); extern void ctc_mpc_dealloc_ch(int port); extern void ctc_mpc_flow_control(int port, int flowc); /* * other MPC Group prototypes and structures */ #define ETH_P_SNA_DIX 0x80D5 /* * Declaration of an XID2 * */ #define ALLZEROS 0x0000000000000000 #define XID_FM2 0x20 #define XID2_0 0x00 #define XID2_7 0x07 #define XID2_WRITE_SIDE 0x04 #define XID2_READ_SIDE 0x05 struct xid2 { __u8 xid2_type_id; __u8 xid2_len; __u32 xid2_adj_id; __u8 xid2_rlen; __u8 xid2_resv1; __u8 xid2_flag1; __u8 xid2_fmtt; __u8 xid2_flag4; __u16 xid2_resv2; __u8 xid2_tgnum; __u32 xid2_sender_id; __u8 xid2_flag2; __u8 xid2_option; char xid2_resv3[8]; __u16 xid2_resv4; __u8 xid2_dlc_type; __u16 xid2_resv5; __u8 xid2_mpc_flag; __u8 xid2_resv6; __u16 xid2_buf_len; char xid2_buffer[255 - (13 * sizeof(__u8) + 2 * sizeof(__u32) + 4 * sizeof(__u16) + 8 * sizeof(char))]; } __attribute__ ((packed)); #define XID2_LENGTH (sizeof(struct xid2)) struct th_header { __u8 th_seg; __u8 th_ch_flag; #define TH_HAS_PDU 0xf0 #define TH_IS_XID 0x01 #define TH_SWEEP_REQ 0xfe #define TH_SWEEP_RESP 0xff __u8 th_blk_flag; #define TH_DATA_IS_XID 0x80 #define TH_RETRY 0x40 #define TH_DISCONTACT 0xc0 #define TH_SEG_BLK 0x20 #define TH_LAST_SEG 0x10 #define TH_PDU_PART 0x08 __u8 th_is_xid; /* is 0x01 if this is XID */ __u32 th_seq_num; } __attribute__ ((packed)); struct th_addon { __u32 th_last_seq; __u32 th_resvd; } __attribute__ ((packed)); struct th_sweep { struct th_header th; struct th_addon sw; } __attribute__ ((packed)); #define TH_HEADER_LENGTH (sizeof(struct th_header)) #define TH_SWEEP_LENGTH (sizeof(struct th_sweep)) #define PDU_LAST 0x80 #define PDU_CNTL 0x40 #define PDU_FIRST 0x20 struct pdu { __u32 pdu_offset; __u8 pdu_flag; __u8 pdu_proto; /* 0x01 is APPN SNA */ __u16 pdu_seq; } __attribute__ ((packed)); #define PDU_HEADER_LENGTH (sizeof(struct pdu)) struct qllc { __u8 qllc_address; #define QLLC_REQ 0xFF #define QLLC_RESP 0x00 __u8 qllc_commands; #define QLLC_DISCONNECT 0x53 #define QLLC_UNSEQACK 0x73 #define QLLC_SETMODE 0x93 #define QLLC_EXCHID 0xBF } __attribute__ ((packed)); /* * Definition of one MPC group */ #define MAX_MPCGCHAN 10 #define MPC_XID_TIMEOUT_VALUE 10000 #define MPC_CHANNEL_ADD 0 #define MPC_CHANNEL_REMOVE 1 #define MPC_CHANNEL_ATTN 2 #define XSIDE 1 #define YSIDE 0 struct mpcg_info { struct sk_buff *skb; struct channel *ch; struct xid2 *xid; struct th_sweep *sweep; struct th_header *th; }; struct mpc_group { struct tasklet_struct mpc_tasklet; struct tasklet_struct mpc_tasklet2; int changed_side; int saved_state; int channels_terminating; int out_of_sequence; int flow_off_called; int port_num; int port_persist; int alloc_called; __u32 xid2_adj_id; __u8 xid2_tgnum; __u32 xid2_sender_id; int num_channel_paths; int active_channels[2]; __u16 group_max_buflen; int outstanding_xid2; int outstanding_xid7; int outstanding_xid7_p2; int sweep_req_pend_num; int sweep_rsp_pend_num; struct sk_buff *xid_skb; char *xid_skb_data; struct th_header *xid_th; struct xid2 *xid; char *xid_id; struct th_header *rcvd_xid_th; struct sk_buff *rcvd_xid_skb; char *rcvd_xid_data; __u8 in_sweep; __u8 roll; struct xid2 *saved_xid2; void (*allochanfunc)(int, int); int allocchan_callback_retries; void (*estconnfunc)(int, int, int); int estconn_callback_retries; int estconn_called; int xidnogood; int send_qllc_disc; fsm_timer timer; fsm_instance *fsm; /* group xid fsm */ }; #ifdef DEBUGDATA void ctcmpc_dumpit(char *buf, int len); #else static inline void ctcmpc_dumpit(char *buf, int len) { } #endif #ifdef DEBUGDATA /* * Dump header and first 16 bytes of an sk_buff for debugging purposes. * * skb The struct sk_buff to dump. * offset Offset relative to skb-data, where to start the dump. */ void ctcmpc_dump_skb(struct sk_buff *skb, int offset); #else static inline void ctcmpc_dump_skb(struct sk_buff *skb, int offset) {} #endif static inline void ctcmpc_dump32(char *buf, int len) { if (len < 32) ctcmpc_dumpit(buf, len); else ctcmpc_dumpit(buf, 32); } int ctcmpc_open(struct net_device *); void ctcm_ccw_check_rc(struct channel *, int, char *); void mpc_group_ready(unsigned long adev); void mpc_channel_action(struct channel *ch, int direction, int action); void mpc_action_send_discontact(unsigned long thischan); void mpc_action_discontact(fsm_instance *fi, int event, void *arg); void ctcmpc_bh(unsigned long thischan); #endif /* --- This is the END my friend --- */