/*
 *  drivers/s390/char/sclp.h
 *
 *  S390 version
 *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
 *    Author(s): Martin Peschke <mpeschke@de.ibm.com>
 *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __SCLP_H__
#define __SCLP_H__

#include <linux/types.h>
#include <linux/list.h>

#include <asm/ebcdic.h>

/* maximum number of pages concerning our own memory management */
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define MAX_CONSOLE_PAGES	4

#define EvTyp_OpCmd		0x01
#define EvTyp_Msg		0x02
#define EvTyp_StateChange	0x08
#define EvTyp_PMsgCmd		0x09
#define EvTyp_CntlProgOpCmd	0x20
#define EvTyp_CntlProgIdent	0x0B
#define EvTyp_SigQuiesce	0x1D
#define EvTyp_VT220Msg		0x1A

#define EvTyp_OpCmd_Mask	0x80000000
#define EvTyp_Msg_Mask		0x40000000
#define EvTyp_StateChange_Mask	0x01000000
#define EvTyp_PMsgCmd_Mask	0x00800000
#define EvTyp_CtlProgOpCmd_Mask	0x00000001
#define EvTyp_CtlProgIdent_Mask	0x00200000
#define EvTyp_SigQuiesce_Mask	0x00000008
#define EvTyp_VT220Msg_Mask	0x00000040

#define GnrlMsgFlgs_DOM		0x8000
#define GnrlMsgFlgs_SndAlrm	0x4000
#define GnrlMsgFlgs_HoldMsg	0x2000

#define LnTpFlgs_CntlText	0x8000
#define LnTpFlgs_LabelText	0x4000
#define LnTpFlgs_DataText	0x2000
#define LnTpFlgs_EndText	0x1000
#define LnTpFlgs_PromptText	0x0800

typedef unsigned int sclp_cmdw_t;

#define SCLP_CMDW_READDATA	0x00770005
#define SCLP_CMDW_WRITEDATA	0x00760005
#define SCLP_CMDW_WRITEMASK	0x00780005

#define GDS_ID_MDSMU		0x1310
#define GDS_ID_MDSRouteInfo	0x1311
#define GDS_ID_AgUnWrkCorr	0x1549
#define GDS_ID_SNACondReport	0x1532
#define GDS_ID_CPMSU		0x1212
#define GDS_ID_RoutTargInstr	0x154D
#define GDS_ID_OpReq		0x8070
#define GDS_ID_TextCmd		0x1320

#define GDS_KEY_SelfDefTextMsg	0x31

typedef u32 sccb_mask_t;	/* ATTENTION: assumes 32bit mask !!! */

struct sccb_header {
	u16	length;
	u8	function_code;
	u8	control_mask[3];
	u16	response_code;
} __attribute__((packed));

struct gds_subvector {
	u8	length;
	u8	key;
} __attribute__((packed));

struct gds_vector {
	u16	length;
	u16	gds_id;
} __attribute__((packed));

struct evbuf_header {
	u16	length;
	u8	type;
	u8	flags;
	u16	_reserved;
} __attribute__((packed));

struct sclp_req {
	struct list_head list;		/* list_head for request queueing. */
	sclp_cmdw_t command;		/* sclp command to execute */
	void	*sccb;			/* pointer to the sccb to execute */
	char	status;			/* status of this request */
	int     start_count;		/* number of SVCs done for this req */
	/* Callback that is called after reaching final status. */
	void (*callback)(struct sclp_req *, void *data);
	void *callback_data;
};

#define SCLP_REQ_FILLED	  0x00	/* request is ready to be processed */
#define SCLP_REQ_QUEUED	  0x01	/* request is queued to be processed */
#define SCLP_REQ_RUNNING  0x02	/* request is currently running */
#define SCLP_REQ_DONE	  0x03	/* request is completed successfully */
#define SCLP_REQ_FAILED	  0x05	/* request is finally failed */

/* function pointers that a high level driver has to use for registration */
/* of some routines it wants to be called from the low level driver */
struct sclp_register {
	struct list_head list;
	/* event masks this user is registered for */
	sccb_mask_t receive_mask;
	sccb_mask_t send_mask;
	/* actually present events */
	sccb_mask_t sclp_receive_mask;
	sccb_mask_t sclp_send_mask;
	/* called if event type availability changes */
	void (*state_change_fn)(struct sclp_register *);
	/* called for events in cp_receive_mask/sclp_receive_mask */
	void (*receiver_fn)(struct evbuf_header *);
};

/* externals from sclp.c */
int sclp_add_request(struct sclp_req *req);
void sclp_sync_wait(void);
int sclp_register(struct sclp_register *reg);
void sclp_unregister(struct sclp_register *reg);
int sclp_remove_processed(struct sccb_header *sccb);
int sclp_deactivate(void);
int sclp_reactivate(void);

/* useful inlines */

/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
/* translate single character from ASCII to EBCDIC */
static inline unsigned char
sclp_ascebc(unsigned char ch)
{
	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
}

/* translate string from EBCDIC to ASCII */
static inline void
sclp_ebcasc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
}

/* translate string from ASCII to EBCDIC */
static inline void
sclp_ascebc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
}

#endif	 /* __SCLP_H__ */