a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
356 lines
8 KiB
C
356 lines
8 KiB
C
/*
|
|
* 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 --- */
|