mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/* $FreeBSD$ */
|
|
/* $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 {
|
|
device_t 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 scsipi_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
|