359 lines
8.1 KiB
C
359 lines
8.1 KiB
C
|
/*
|
||
|
|
* drivers/s390/net/ctcm_fsms.h
|
||
|
|
*
|
||
|
|
* Copyright IBM Corp. 2001, 2007
|
||
|
|
* Authors: Fritz Elfert (felfert@millenux.com)
|
||
|
|
* Peter Tiedemann (ptiedem@de.ibm.com)
|
||
|
|
* MPC additions :
|
||
|
|
* Belinda Thompson (belindat@us.ibm.com)
|
||
|
|
* Andy Richter (richtera@us.ibm.com)
|
||
|
|
*/
|
||
|
|
#ifndef _CTCM_FSMS_H_
|
||
|
|
#define _CTCM_FSMS_H_
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/timer.h>
|
||
|
|
#include <linux/bitops.h>
|
||
|
|
|
||
|
|
#include <linux/signal.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
|
||
|
|
#include <linux/ip.h>
|
||
|
|
#include <linux/if_arp.h>
|
||
|
|
#include <linux/tcp.h>
|
||
|
|
#include <linux/skbuff.h>
|
||
|
|
#include <linux/ctype.h>
|
||
|
|
#include <net/dst.h>
|
||
|
|
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <asm/ccwdev.h>
|
||
|
|
#include <asm/ccwgroup.h>
|
||
|
|
#include <linux/uaccess.h>
|
||
|
|
|
||
|
|
#include <asm/idals.h>
|
||
|
|
|
||
|
|
#include "fsm.h"
|
||
|
|
#include "ctcm_main.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Definitions for the channel statemachine(s) for ctc and ctcmpc
|
||
|
|
*
|
||
|
|
* To allow better kerntyping, prefix-less definitions for channel states
|
||
|
|
* and channel events have been replaced :
|
||
|
|
* ch_event... -> ctc_ch_event...
|
||
|
|
* CH_EVENT... -> CTC_EVENT...
|
||
|
|
* ch_state... -> ctc_ch_state...
|
||
|
|
* CH_STATE... -> CTC_STATE...
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* Events of the channel statemachine(s) for ctc and ctcmpc
|
||
|
|
*/
|
||
|
|
enum ctc_ch_events {
|
||
|
|
/*
|
||
|
|
* Events, representing return code of
|
||
|
|
* I/O operations (ccw_device_start, ccw_device_halt et al.)
|
||
|
|
*/
|
||
|
|
CTC_EVENT_IO_SUCCESS,
|
||
|
|
CTC_EVENT_IO_EBUSY,
|
||
|
|
CTC_EVENT_IO_ENODEV,
|
||
|
|
CTC_EVENT_IO_UNKNOWN,
|
||
|
|
|
||
|
|
CTC_EVENT_ATTNBUSY,
|
||
|
|
CTC_EVENT_ATTN,
|
||
|
|
CTC_EVENT_BUSY,
|
||
|
|
/*
|
||
|
|
* Events, representing unit-check
|
||
|
|
*/
|
||
|
|
CTC_EVENT_UC_RCRESET,
|
||
|
|
CTC_EVENT_UC_RSRESET,
|
||
|
|
CTC_EVENT_UC_TXTIMEOUT,
|
||
|
|
CTC_EVENT_UC_TXPARITY,
|
||
|
|
CTC_EVENT_UC_HWFAIL,
|
||
|
|
CTC_EVENT_UC_RXPARITY,
|
||
|
|
CTC_EVENT_UC_ZERO,
|
||
|
|
CTC_EVENT_UC_UNKNOWN,
|
||
|
|
/*
|
||
|
|
* Events, representing subchannel-check
|
||
|
|
*/
|
||
|
|
CTC_EVENT_SC_UNKNOWN,
|
||
|
|
/*
|
||
|
|
* Events, representing machine checks
|
||
|
|
*/
|
||
|
|
CTC_EVENT_MC_FAIL,
|
||
|
|
CTC_EVENT_MC_GOOD,
|
||
|
|
/*
|
||
|
|
* Event, representing normal IRQ
|
||
|
|
*/
|
||
|
|
CTC_EVENT_IRQ,
|
||
|
|
CTC_EVENT_FINSTAT,
|
||
|
|
/*
|
||
|
|
* Event, representing timer expiry.
|
||
|
|
*/
|
||
|
|
CTC_EVENT_TIMER,
|
||
|
|
/*
|
||
|
|
* Events, representing commands from upper levels.
|
||
|
|
*/
|
||
|
|
CTC_EVENT_START,
|
||
|
|
CTC_EVENT_STOP,
|
||
|
|
CTC_NR_EVENTS,
|
||
|
|
/*
|
||
|
|
* additional MPC events
|
||
|
|
*/
|
||
|
|
CTC_EVENT_SEND_XID = CTC_NR_EVENTS,
|
||
|
|
CTC_EVENT_RSWEEP_TIMER,
|
||
|
|
/*
|
||
|
|
* MUST be always the last element!!
|
||
|
|
*/
|
||
|
|
CTC_MPC_NR_EVENTS,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* States of the channel statemachine(s) for ctc and ctcmpc.
|
||
|
|
*/
|
||
|
|
enum ctc_ch_states {
|
||
|
|
/*
|
||
|
|
* Channel not assigned to any device,
|
||
|
|
* initial state, direction invalid
|
||
|
|
*/
|
||
|
|
CTC_STATE_IDLE,
|
||
|
|
/*
|
||
|
|
* Channel assigned but not operating
|
||
|
|
*/
|
||
|
|
CTC_STATE_STOPPED,
|
||
|
|
CTC_STATE_STARTWAIT,
|
||
|
|
CTC_STATE_STARTRETRY,
|
||
|
|
CTC_STATE_SETUPWAIT,
|
||
|
|
CTC_STATE_RXINIT,
|
||
|
|
CTC_STATE_TXINIT,
|
||
|
|
CTC_STATE_RX,
|
||
|
|
CTC_STATE_TX,
|
||
|
|
CTC_STATE_RXIDLE,
|
||
|
|
CTC_STATE_TXIDLE,
|
||
|
|
CTC_STATE_RXERR,
|
||
|
|
CTC_STATE_TXERR,
|
||
|
|
CTC_STATE_TERM,
|
||
|
|
CTC_STATE_DTERM,
|
||
|
|
CTC_STATE_NOTOP,
|
||
|
|
CTC_NR_STATES, /* MUST be the last element of non-expanded states */
|
||
|
|
/*
|
||
|
|
* additional MPC states
|
||
|
|
*/
|
||
|
|
CH_XID0_PENDING = CTC_NR_STATES,
|
||
|
|
CH_XID0_INPROGRESS,
|
||
|
|
CH_XID7_PENDING,
|
||
|
|
CH_XID7_PENDING1,
|
||
|
|
CH_XID7_PENDING2,
|
||
|
|
CH_XID7_PENDING3,
|
||
|
|
CH_XID7_PENDING4,
|
||
|
|
CTC_MPC_NR_STATES, /* MUST be the last element of expanded mpc states */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern const char *ctc_ch_event_names[];
|
||
|
|
|
||
|
|
extern const char *ctc_ch_state_names[];
|
||
|
|
|
||
|
|
void ctcm_ccw_check_rc(struct channel *ch, int rc, char *msg);
|
||
|
|
void ctcm_purge_skb_queue(struct sk_buff_head *q);
|
||
|
|
void fsm_action_nop(fsm_instance *fi, int event, void *arg);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ----- non-static actions for ctcm channel statemachine -----
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void ctcm_chx_txidle(fsm_instance *fi, int event, void *arg);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ----- FSM (state/event/action) of the ctcm channel statemachine -----
|
||
|
|
*/
|
||
|
|
extern const fsm_node ch_fsm[];
|
||
|
|
extern int ch_fsm_len;
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ----- non-static actions for ctcmpc channel statemachine ----
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
/* shared :
|
||
|
|
void ctcm_chx_txidle(fsm_instance * fi, int event, void *arg);
|
||
|
|
*/
|
||
|
|
void ctcmpc_chx_rxidle(fsm_instance *fi, int event, void *arg);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ----- FSM (state/event/action) of the ctcmpc channel statemachine -----
|
||
|
|
*/
|
||
|
|
extern const fsm_node ctcmpc_ch_fsm[];
|
||
|
|
extern int mpc_ch_fsm_len;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Definitions for the device interface statemachine for ctc and mpc
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* States of the device interface statemachine.
|
||
|
|
*/
|
||
|
|
enum dev_states {
|
||
|
|
DEV_STATE_STOPPED,
|
||
|
|
DEV_STATE_STARTWAIT_RXTX,
|
||
|
|
DEV_STATE_STARTWAIT_RX,
|
||
|
|
DEV_STATE_STARTWAIT_TX,
|
||
|
|
DEV_STATE_STOPWAIT_RXTX,
|
||
|
|
DEV_STATE_STOPWAIT_RX,
|
||
|
|
DEV_STATE_STOPWAIT_TX,
|
||
|
|
DEV_STATE_RUNNING,
|
||
|
|
/*
|
||
|
|
* MUST be always the last element!!
|
||
|
|
*/
|
||
|
|
CTCM_NR_DEV_STATES
|
||
|
|
};
|
||
|
|
|
||
|
|
extern const char *dev_state_names[];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Events of the device interface statemachine.
|
||
|
|
* ctcm and ctcmpc
|
||
|
|
*/
|
||
|
|
enum dev_events {
|
||
|
|
DEV_EVENT_START,
|
||
|
|
DEV_EVENT_STOP,
|
||
|
|
DEV_EVENT_RXUP,
|
||
|
|
DEV_EVENT_TXUP,
|
||
|
|
DEV_EVENT_RXDOWN,
|
||
|
|
DEV_EVENT_TXDOWN,
|
||
|
|
DEV_EVENT_RESTART,
|
||
|
|
/*
|
||
|
|
* MUST be always the last element!!
|
||
|
|
*/
|
||
|
|
CTCM_NR_DEV_EVENTS
|
||
|
|
};
|
||
|
|
|
||
|
|
extern const char *dev_event_names[];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Actions for the device interface statemachine.
|
||
|
|
* ctc and ctcmpc
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
static void dev_action_start(fsm_instance * fi, int event, void *arg);
|
||
|
|
static void dev_action_stop(fsm_instance * fi, int event, void *arg);
|
||
|
|
static void dev_action_restart(fsm_instance *fi, int event, void *arg);
|
||
|
|
static void dev_action_chup(fsm_instance * fi, int event, void *arg);
|
||
|
|
static void dev_action_chdown(fsm_instance * fi, int event, void *arg);
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The (state/event/action) fsm table of the device interface statemachine.
|
||
|
|
* ctcm and ctcmpc
|
||
|
|
*/
|
||
|
|
extern const fsm_node dev_fsm[];
|
||
|
|
extern int dev_fsm_len;
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Definitions for the MPC Group statemachine
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* MPC Group Station FSM States
|
||
|
|
|
||
|
|
State Name When In This State
|
||
|
|
====================== =======================================
|
||
|
|
MPCG_STATE_RESET Initial State When Driver Loaded
|
||
|
|
We receive and send NOTHING
|
||
|
|
|
||
|
|
MPCG_STATE_INOP INOP Received.
|
||
|
|
Group level non-recoverable error
|
||
|
|
|
||
|
|
MPCG_STATE_READY XID exchanges for at least 1 write and
|
||
|
|
1 read channel have completed.
|
||
|
|
Group is ready for data transfer.
|
||
|
|
|
||
|
|
States from ctc_mpc_alloc_channel
|
||
|
|
==============================================================
|
||
|
|
MPCG_STATE_XID2INITW Awaiting XID2(0) Initiation
|
||
|
|
ATTN from other side will start
|
||
|
|
XID negotiations.
|
||
|
|
Y-side protocol only.
|
||
|
|
|
||
|
|
MPCG_STATE_XID2INITX XID2(0) negotiations are in progress.
|
||
|
|
At least 1, but not all, XID2(0)'s
|
||
|
|
have been received from partner.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITW XID2(0) complete
|
||
|
|
No XID2(7)'s have yet been received.
|
||
|
|
XID2(7) negotiations pending.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITX XID2(7) negotiations in progress.
|
||
|
|
At least 1, but not all, XID2(7)'s
|
||
|
|
have been received from partner.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITF XID2(7) negotiations complete.
|
||
|
|
Transitioning to READY.
|
||
|
|
|
||
|
|
MPCG_STATE_READY Ready for Data Transfer.
|
||
|
|
|
||
|
|
|
||
|
|
States from ctc_mpc_establish_connectivity call
|
||
|
|
==============================================================
|
||
|
|
MPCG_STATE_XID0IOWAIT Initiating XID2(0) negotiations.
|
||
|
|
X-side protocol only.
|
||
|
|
ATTN-BUSY from other side will convert
|
||
|
|
this to Y-side protocol and the
|
||
|
|
ctc_mpc_alloc_channel flow will begin.
|
||
|
|
|
||
|
|
MPCG_STATE_XID0IOWAIX XID2(0) negotiations are in progress.
|
||
|
|
At least 1, but not all, XID2(0)'s
|
||
|
|
have been received from partner.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITI XID2(0) complete
|
||
|
|
No XID2(7)'s have yet been received.
|
||
|
|
XID2(7) negotiations pending.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITZ XID2(7) negotiations in progress.
|
||
|
|
At least 1, but not all, XID2(7)'s
|
||
|
|
have been received from partner.
|
||
|
|
|
||
|
|
MPCG_STATE_XID7INITF XID2(7) negotiations complete.
|
||
|
|
Transitioning to READY.
|
||
|
|
|
||
|
|
MPCG_STATE_READY Ready for Data Transfer.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
enum mpcg_events {
|
||
|
|
MPCG_EVENT_INOP,
|
||
|
|
MPCG_EVENT_DISCONC,
|
||
|
|
MPCG_EVENT_XID0DO,
|
||
|
|
MPCG_EVENT_XID2,
|
||
|
|
MPCG_EVENT_XID2DONE,
|
||
|
|
MPCG_EVENT_XID7DONE,
|
||
|
|
MPCG_EVENT_TIMER,
|
||
|
|
MPCG_EVENT_DOIO,
|
||
|
|
MPCG_NR_EVENTS,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum mpcg_states {
|
||
|
|
MPCG_STATE_RESET,
|
||
|
|
MPCG_STATE_INOP,
|
||
|
|
MPCG_STATE_XID2INITW,
|
||
|
|
MPCG_STATE_XID2INITX,
|
||
|
|
MPCG_STATE_XID7INITW,
|
||
|
|
MPCG_STATE_XID7INITX,
|
||
|
|
MPCG_STATE_XID0IOWAIT,
|
||
|
|
MPCG_STATE_XID0IOWAIX,
|
||
|
|
MPCG_STATE_XID7INITI,
|
||
|
|
MPCG_STATE_XID7INITZ,
|
||
|
|
MPCG_STATE_XID7INITF,
|
||
|
|
MPCG_STATE_FLOWC,
|
||
|
|
MPCG_STATE_READY,
|
||
|
|
MPCG_NR_STATES,
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|
||
|
|
/* --- This is the END my friend --- */
|