in2000.h

基于组件方式开发操作系统的OSKIT源代码

#define CTRL_EDI     0x08
#define CTRL_HHP     0x10
#define CTRL_POLLED  0x00
#define CTRL_BURST   0x20
#define CTRL_BUS     0x40
#define CTRL_DMA     0x80

   /* Timeout Period register */
#define TIMEOUT_PERIOD_VALUE  20    /* results in 200 ms. */

   /* Synchronous Transfer Register */
#define STR_FSS      0x80

   /* Destination ID register */
#define DSTID_DPD    0x40
#define DATA_OUT_DIR 0
#define DATA_IN_DIR  1
#define DSTID_SCC    0x80

   /* Source ID register */
#define SRCID_MASK   0x07
#define SRCID_SIV    0x08
#define SRCID_DSP    0x20
#define SRCID_ES     0x40
#define SRCID_ER     0x80



#define ILLEGAL_STATUS_BYTE   0xff


#define DEFAULT_SX_PER     500   /* (ns) fairly safe */
#define DEFAULT_SX_OFF     0     /* aka async */

#define OPTIMUM_SX_PER     252   /* (ns) best we can do (mult-of-4) */
#define OPTIMUM_SX_OFF     12    /* size of in2000 fifo */

struct sx_period {
   unsigned int   period_ns;
   uchar          reg_value;
   };


struct IN2000_hostdata {
    struct Scsi_Host *next;
    uchar            chip;             /* what kind of wd33c93 chip? */
    uchar            microcode;        /* microcode rev if 'B' */
    unsigned short   io_base;          /* IO port base */
    unsigned int     dip_switch;       /* dip switch settings */
    unsigned int     hrev;             /* hardware revision of card */
    volatile uchar   busy[8];          /* index = target, bit = lun */
    volatile Scsi_Cmnd *input_Q;       /* commands waiting to be started */
    volatile Scsi_Cmnd *selecting;     /* trying to select this command */
    volatile Scsi_Cmnd *connected;     /* currently connected command */
    volatile Scsi_Cmnd *disconnected_Q;/* commands waiting for reconnect */
    uchar            state;            /* what we are currently doing */
    uchar            fifo;             /* what the FIFO is up to */
    uchar            level2;           /* extent to which Level-2 commands are used */
    uchar            disconnect;       /* disconnect/reselect policy */
    unsigned int     args;             /* set from command-line argument */
    uchar            incoming_msg[8];  /* filled during message_in phase */
    int              incoming_ptr;     /* mainly used with EXTENDED messages */
    uchar            outgoing_msg[8];  /* send this during next message_out */
    int              outgoing_len;     /* length of outgoing message */
    unsigned int     default_sx_per;   /* default transfer period for SCSI bus */
    uchar            sync_xfer[8];     /* sync_xfer reg settings per target */
    uchar            sync_stat[8];     /* status of sync negotiation per target */
    uchar            sync_off;         /* bit mask: don't use sync with these targets */
#ifdef PROC_INTERFACE
    uchar            proc;             /* bit mask: what's in proc output */
#ifdef PROC_STATISTICS
    unsigned long    cmd_cnt[8];       /* # of commands issued per target */
    unsigned long    int_cnt;          /* # of interrupts serviced */
    unsigned long    disc_allowed_cnt[8]; /* # of disconnects allowed per target */
    unsigned long    disc_done_cnt[8]; /* # of disconnects done per target*/
#endif
#endif
    };


/* defines for hostdata->chip */

#define C_WD33C93       0
#define C_WD33C93A      1
#define C_WD33C93B      2
#define C_UNKNOWN_CHIP  100

/* defines for hostdata->state */

#define S_UNCONNECTED         0
#define S_SELECTING           1
#define S_RUNNING_LEVEL2      2
#define S_CONNECTED           3
#define S_PRE_TMP_DISC        4
#define S_PRE_CMP_DISC        5

/* defines for hostdata->fifo */

#define FI_FIFO_UNUSED        0
#define FI_FIFO_READING       1
#define FI_FIFO_WRITING       2

/* defines for hostdata->level2 */
/* NOTE: only the first 3 are trustworthy at this point -
 * having trouble when more than 1 device is reading/writing
 * at the same time...
 */

#define L2_NONE      0  /* no combination commands - we get lots of ints */
#define L2_SELECT    1  /* start with SEL_ATN_XFER, but never resume it */
#define L2_BASIC     2  /* resume after STATUS ints & RDP messages */
#define L2_DATA      3  /* resume after DATA_IN/OUT ints */
#define L2_MOST      4  /* resume after anything except a RESELECT int */
#define L2_RESELECT  5  /* resume after everything, including RESELECT ints */
#define L2_ALL       6  /* always resume */

/* defines for hostdata->disconnect */

#define DIS_NEVER    0
#define DIS_ADAPTIVE 1
#define DIS_ALWAYS   2

/* defines for hostdata->args */

#define DB_TEST               1<<0
#define DB_FIFO               1<<1
#define DB_QUEUE_COMMAND      1<<2
#define DB_EXECUTE            1<<3
#define DB_INTR               1<<4
#define DB_TRANSFER           1<<5
#define DB_MASK               0x3f

#define A_NO_SCSI_RESET       1<<15


/* defines for hostdata->sync_xfer[] */

#define SS_UNSET     0
#define SS_FIRST     1
#define SS_WAITING   2
#define SS_SET       3

/* defines for hostdata->proc */

#define PR_VERSION   1<<0
#define PR_INFO      1<<1
#define PR_STATISTICS 1<<2
#define PR_CONNECTED 1<<3
#define PR_INPUTQ    1<<4
#define PR_DISCQ     1<<5
#define PR_TEST      1<<6
#define PR_STOP      1<<7


#include <linux/version.h>

#if LINUX_VERSION_CODE < 0x020100   /* 2.0.xx */
# define in2000__INITFUNC(function) function
# define in2000__INIT
# define in2000__INITDATA
# define CLISPIN_LOCK(flags)   do { save_flags(flags); cli(); } while(0)
# define CLISPIN_UNLOCK(flags) restore_flags(flags)
#else                               /* 2.1.xxx */
# include <linux/init.h>
# include <asm/spinlock.h>
# define in2000__INITFUNC(function) __initfunc(function)
# define in2000__INIT __init
# define in2000__INITDATA __initdata
# define CLISPIN_LOCK(flags)   spin_lock_irqsave(&io_request_lock, flags)
# define CLISPIN_UNLOCK(flags) spin_unlock_irqrestore(&io_request_lock, flags)
#endif


int in2000_detect(Scsi_Host_Template *) in2000__INIT;
int in2000_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
int in2000_abort(Scsi_Cmnd *);
void in2000_setup(char *, int *) in2000__INIT;
int in2000_proc_info(char *, char **, off_t, int, int, int);
struct proc_dir_entry proc_scsi_in2000;
int in2000_biosparam(struct scsi_disk *, kdev_t, int *);
int in2000_reset(Scsi_Cmnd *, unsigned int);


#define IN2000_CAN_Q    16
#define IN2000_SG       SG_ALL
#define IN2000_CPL      2
#define IN2000_HOST_ID  7

#if LINUX_VERSION_CODE < 0x020100   /* 2.0.xx */

#define IN2000 {  NULL,                /* link pointer for modules */ \
                  NULL,                /* usage_count for modules */ \
                  &proc_scsi_in2000,   /* pointer to /proc/scsi directory entry */ \
                  in2000_proc_info,    /* pointer to proc info function */ \
                  "Always IN2000",     /* device name */ \
                  in2000_detect,       /* returns number of in2000's found */ \
                  NULL,                /* optional unload function for modules */ \
                  NULL,                /* optional misc info function */ \
                  NULL,                /* send scsi command, wait for completion */ \
                  in2000_queuecommand, /* queue scsi command, don't wait */ \
                  in2000_abort,        /* abort current command */ \
                  in2000_reset,        /* reset scsi bus */ \
                  NULL,                /* slave_attach - unused */ \
                  in2000_biosparam,    /* figures out BIOS parameters for lilo, etc */ \
                  IN2000_CAN_Q,        /* max commands we can queue up */ \
                  IN2000_HOST_ID,      /* host-adapter scsi id */ \
                  IN2000_SG,           /* scatter-gather table size */ \
                  IN2000_CPL,          /* commands per lun */ \
                  0,                   /* board counter */ \
                  0,                   /* unchecked dma */ \
                  DISABLE_CLUSTERING \
               }

#else       /* 2.1.xxx */

#define IN2000 {  proc_dir:        &proc_scsi_in2000,   /* pointer to /proc/scsi directory entry */ \
                  proc_info:       in2000_proc_info,    /* pointer to proc info function */ \
                  name:            "Always IN2000",     /* device name */ \
                  detect:          in2000_detect,       /* returns number of in2000's found */ \
                  queuecommand:    in2000_queuecommand, /* queue scsi command, don't wait */ \
                  abort:           in2000_abort,        /* abort current command */ \
                  reset:           in2000_reset,        /* reset scsi bus */ \
                  bios_param:      in2000_biosparam,    /* figures out BIOS parameters for lilo, etc */ \
                  can_queue:       IN2000_CAN_Q,        /* max commands we can queue up */ \
                  this_id:         IN2000_HOST_ID,      /* host-adapter scsi id */ \
                  sg_tablesize:    IN2000_SG,           /* scatter-gather table size */ \
                  cmd_per_lun:     IN2000_CPL,          /* commands per lun */ \
                  use_clustering:  DISABLE_CLUSTERING,  /* ENABLE_CLUSTERING may speed things up */ \
                  use_new_eh_code: 0                    /* new error code - not using it yet */ \
                }

#endif


#endif /* IN2000_H */