/* $OpenBSD: ascvar.h,v 1.3 1998/05/18 00:25:10 millert Exp $ */ /* $NetBSD: ascvar.h,v 1.4 1997/11/28 18:23:40 mhitch Exp $ */ /* * State kept for each active SCSI device. */ struct script; typedef struct scsi_state { struct script *script; /* saved script while processing error */ int statusByte; /* status byte returned during STATUS_PHASE */ int error; /* errno to pass back to device driver */ u_char *dmaBufAddr; /* DMA buffer address */ int dmalen; /* amount to transfer in this chunk */ int dmaresid; /* amount not transfered if chunk suspended */ int buflen; /* total remaining amount of data to transfer */ char *buf; /* current pointer within scsicmd->buf */ int flags; /* see below */ int msglen; /* number of message bytes to read */ int msgcnt; /* number of message bytes received */ u_char sync_period; /* DMA synchronous period */ u_char sync_offset; /* DMA synchronous xfer offset or 0 if async */ u_char msg_out; /* next MSG_OUT byte to send */ u_char msg_in[16]; /* buffer for multibyte messages */ } State; /* state flags */ #define DISCONN 0x001 /* true if currently disconnected from bus */ #define DMA_IN_PROGRESS 0x002 /* true if data DMA started */ #define DMA_IN 0x004 /* true if reading from SCSI device */ #define DMA_RESUME 0x08 /* true if DMA was interrupted by disc. */ #define DMA_OUT 0x010 /* true if writing to SCSI device */ #define DID_SYNC 0x020 /* true if synchronous offset was negotiated */ #define TRY_SYNC 0x040 /* true if try neg. synchronous offset */ #define PARITY_ERR 0x080 /* true if parity error seen */ #define CHECK_SENSE 0x100 /* true if doing sense command */ /* * State kept for each active SCSI host interface (53C94). */ struct asc_softc { struct device sc_dev; /* us as a device */ asc_regmap_t *regs; /* chip address */ volatile int *dmar; /* DMA address register address */ int sc_id; /* SCSI ID of this interface */ int myidmask; /* ~(1 << myid) */ int state; /* current SCSI connection state */ int target; /* target SCSI ID if busy */ struct script *script; /* next expected interrupt & action */ ScsiCmd *cmd[ASC_NCMD]; /* active command indexed by SCSI ID */ State st[ASC_NCMD]; /* state info for each active command */ /* Start dma routine */ int (*dma_start) __P((struct asc_softc *asc, struct scsi_state *state, caddr_t cp, int flag, int len, int off)); /* End dma routine */ void (*dma_end) __P((struct asc_softc *asc, struct scsi_state *state, int flag)); u_char *dma_next; int dma_xfer; /* Dma len still to go */ int min_period; /* Min transfer period clk/byte */ int max_period; /* Max transfer period clk/byte */ int ccf; /* CCF, whatever that really is? */ int timeout_250; /* 250ms timeout */ int tb_ticks; /* 4ns. ticks/tb channel ticks */ #ifdef USE_NEW_SCSI struct scsi_link sc_link; /* scsipi link struct */ #endif }; typedef struct asc_softc *asc_softc_t; #define ASC_STATE_IDLE 0 /* idle state */ #define ASC_STATE_BUSY 1 /* selecting or currently connected */ #define ASC_STATE_TARGET 2 /* currently selected as target */ #define ASC_STATE_RESEL 3 /* currently waiting for reselect */ #define ASC_SPEED_25_MHZ 250 #define ASC_SPEED_12_5_MHZ 125 void ascattach __P((struct asc_softc *asc, int bus_speed)); int asc_intr __P ((void *asc)); /* * Dma operations. */ #define ASCDMA_READ 1 #define ASCDMA_WRITE 2