/*      $NetBSD: siivar.h,v 1.5 2021/12/26 16:08:20 andvar Exp $        */

#ifndef _SIIVAR_H
#define _SIIVAR_H

/*
 * This structure contains information that a SCSI interface controller
 * needs to execute a SCSI command.
 */
typedef struct ScsiCmd {
        int     unit;           /* unit number passed to device done routine */
        int     flags;          /* control flags for this command (see below) */
        int     buflen;         /* length of the data buffer in bytes */
        char    *buf;           /* pointer to data buffer for this command */
        int     cmdlen;         /* length of data in cmdbuf */
        u_char  *cmd;           /* buffer for the SCSI command */
        int     error;          /* compatibility hack for new scsi */
        int     lun;            /* LUN for MI SCSI */
        struct callout timo_ch; /* timeout callout handle */
} ScsiCmd;

typedef struct scsi_state {
        int     statusByte;     /* status byte returned during STATUS_PHASE */
        int     dmaDataPhase;   /* which data phase to expect */
        int     dmaCurPhase;    /* SCSI phase if DMA is in progress */
        int     dmaPrevPhase;   /* SCSI phase of DMA suspended by disconnect */
        u_short *dmaAddr[2];    /* DMA buffer memory address */
        int     dmaBufIndex;    /* which of the above is currently in use */
        int     dmalen;         /* amount to transfer in this chunk */
        int     cmdlen;         /* total remaining amount of cmd to transfer */
        u_char  *cmd;           /* current pointer within scsicmd->cmd */
        int     buflen;         /* total remaining amount of data to transfer */
        char    *buf;           /* current pointer within scsicmd->buf */
        u_short flags;          /* see below */
        u_short prevComm;       /* command reg before disconnect */
        u_short dmaCtrl;        /* DMA control register if disconnect */
        u_short dmaAddrL;       /* DMA address register if disconnect */
        u_short dmaAddrH;       /* DMA address register if disconnect */
        u_short dmaCnt;         /* DMA count if disconnect */
        u_short dmaByte;        /* DMA byte if disconnect on odd boundary */
        u_short dmaReqAck;      /* DMA synchronous xfer offset or 0 if async */
} State;

/* state flags */
#define FIRST_DMA       0x01    /* true if no data DMA started yet */
#define PARITY_ERR      0x02    /* true if parity error seen */

#define SII_NCMD        8
struct siisoftc {
        device_t sc_dev;                /* us as a device */
        struct scsipi_channel sc_channel;
        struct scsipi_adapter sc_adapter;       /* scsipi adapter glue */
        ScsiCmd sc_cmd_fake[SII_NCMD];          /* XXX - hack!!! */
        struct scsipi_xfer *sc_xs[SII_NCMD];    /* XXX - hack!!! */
        void *sc_buf;                   /* DMA buffer (may be special mem) */
        SIIRegs *sc_regs;               /* HW address of SII controller chip */
        int     sc_flags;
        int     sc_target;              /* target SCSI ID if connected */
        ScsiCmd *sc_cmd[SII_NCMD];      /* active command indexed by ID */
        void  (*sii_copytobuf)(u_short *src, volatile u_short *dst, int ln);
        void (*sii_copyfrombuf)(volatile u_short *src, char *dst, int len);

        State   sc_st[SII_NCMD];        /* state info for each active command */
};

int     siiintr(void *sc);

/* Machine-independent back-end attach entry point */

void    sii_scsi_request(struct scsipi_channel *,
                                scsipi_adapter_req_t, void *);
void    siiattach(struct siisoftc *);

#endif  /* _SIIVAR_H */