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