FreeBSD/Linux Kernel Cross Reference
sys/dev/raid/dpt/dpt.h

     /*
      *       Copyright (c) 1997 by Simon Shapiro
      *       All Rights Reserved
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions, and the following disclaimer,
     *    without modification, immediately at the beginning of the file.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD: src/sys/dev/dpt/dpt.h,v 1.8.2.1 2000/08/07 18:48:14 peter Exp $
     */
    
    /*
     *
     *  dpt.h:      Definitions and constants used by the SCSI side of the DPT
     *
     *  credits:    Mike Neuffer;   DPT low level code and in other areas as well.
     *              Mark Salyzyn;   Many vital bits of info and diagnostics.
     *              Justin Gibbs;   FreeBSD API, debugging and style
     *              Ron McDaniels;  SCSI Software Interrupts
     *              FreeBSD.ORG;    Great O/S to work on and for.
     */
    
    
    #ifndef _DPT_H
    #define _DPT_H
    
    #include <sys/ioccom.h>
    
    #undef DPT_USE_DLM_SWI
    
    extern u_long dpt_unit;
    
    #define DPT_RELEASE                             1
    #define DPT_VERSION                             4
    #define DPT_PATCH                               5
    #define DPT_MONTH                               8
    #define DPT_DAY                                 3
    #define DPT_YEAR                                18      /* 1998 - 1980 */
    
    #define DPT_CTL_RELEASE                 1
    #define DPT_CTL_VERSION                 0
    #define DPT_CTL_PATCH                   6
    
    #ifndef PAGESIZ
    #define PAGESIZ                                 4096
    #endif
    
    #ifndef physaddr
    typedef void *physaddr;
    #endif
    
    #undef  DPT_INQUIRE_DEVICES       /* We have no buyers for this function */
    #define DPT_SUPPORT_POLLING       /* Use polled mode at boot (must be ON!) */
    #define DPT_OPENNINGS           8 /* Commands-in-progress per device */
    
    #define DPT_RETRIES             5 /* Times to retry failed commands */
    #undef  DPT_DISABLE_SG
    #define DPT_HAS_OPEN
    
    /* Arguments to dpt_run_queue() can be: */
    
    #define DPT_MAX_TARGET_MODE_BUFFER_SIZE         8192
    #define DPT_FREE_LIST_INCREMENT                 64
    #define DPT_CMD_LEN                             12
    
    /*
     * How many segments do we want in a Scatter/Gather list?
     * Some HBA's can  do 16, Some 8192. Since we pre-allocate
     * them in fixed increments, we need to put a practical limit on
     * these. A passed parameter (from kernel boot or lkm) would help
     */
    #define DPT_MAX_SEGS                            32
    
    /* Debug levels */
    
    #undef  DPT_DEBUG_PCI
    #undef  DPT_DEBUG_INIT
    #undef  DPT_DEBUG_SETUP
    #undef  DPT_DEBUG_STATES
   #undef  DPT_DEBUG_CONFIG
   #undef  DPT_DEBUG_QUEUES
   #undef  DPT_DEBUG_SCSI_CMD
   #undef  DPT_DEBUG_SOFTINTR
   #undef  DPT_DEBUG_HARDINTR
   #undef  DPT_DEBUG_HEX_DUMPS
   #undef  DPT_DEBUG_POLLING
   #undef  DPT_DEBUG_INQUIRE
   #undef  DPT_DEBUG_COMPLETION
   #undef  DPT_DEBUG_COMPLETION_ERRORS
   #define DPT_DEBUG_MINPHYS
   #undef  DPT_DEBUG_SG
   #undef  DPT_DEBUG_SG_SHOW_DATA
   #undef  DPT_DEBUG_SCSI_CMD_NAME
   #undef  DPT_DEBUG_CONTROL
   #undef  DPT_DEBUG_TIMEOUTS
   #undef  DPT_DEBUG_SHUTDOWN
   #define DPT_DEBUG_USER_CMD
   
   /*
    * Misc. definitions
    */
   #undef TRUE
   #undef FALSE
   #define TRUE                    1
   #define FALSE                   0
   
   #define MAX_CHANNELS    3
   #define MAX_TARGETS             16
   #define MAX_LUNS        8
   
   /* Map minor numbers to device identity */
   #define TARGET_MASK                     0x000f
   #define BUS_MASK                        0x0030
   #define HBA_MASK                        0x01c0
   #define LUN_MASK                        0x0e00
   
   #define minor2target(minor)             ( minor & TARGET_MASK )
   #define minor2bus(minor)                ( (minor & BUS_MASK) >> 4 )
   #define minor2hba(minor)                ( (minor & HBA_MASK) >> 6 )
   #define minor2lun(minor)                ( (minor & LUN_MASK) >> 9 )
   
   /*
    * Valid values for cache_type
    */
   #define DPT_NO_CACHE                    0
   #define DPT_CACHE_WRITETHROUGH          1
   #define DPT_CACHE_WRITEBACK                     -2
   
   #define min(a,b) ((a<b)?(a):(b))
   
   #define MAXISA                          4
   #define MAXEISA                         16
   #define MAXPCI                          16
   #define MAXIRQ                          16
   #define MAXTARGET                       16
   
   #define IS_ISA                          'I'
   #define IS_EISA                         'E'
   #define IS_PCI                          'P'
   
   #define BROKEN_INQUIRY  1
   
   #define BUSMASTER                       0xff
   #define PIO                             0xfe
   
   #define EATA_SIGNATURE                  0x41544145 /* little ENDIAN "EATA" */
   #define DPT_BLINK_INDICATOR             0x42445054
   
   #define DPT_ID1                         0x12
   #define DPT_ID2                         0x1
   #define ATT_ID1                         0x06
   #define ATT_ID2                         0x94
   #define ATT_ID3                         0x0
   
   #define NEC_ID1                         0x38
   #define NEC_ID2                         0xa3
   #define NEC_ID3                         0x82
   
   #define MAX_PCI_DEVICES                 32 /* Maximum # Of Devices Per Bus */
   #define MAX_METHOD_2                    16 /* Max Devices For Method 2 */
   #define MAX_PCI_BUS                     16 /* Maximum # Of Busses Allowed */
   
   #define DPT_MAX_RETRIES                 2
   
   #define READ                            0
   #define WRITE                           1
   #define OTHER                           2
   
   #define HD(cmd) ((hostdata *)&(cmd->host->hostdata))
   #define CD(cmd) ((struct eata_ccb *)(cmd->host_scribble))
   #define SD(host) ((hostdata *)&(host->hostdata))
   
   /*
    * EATA Command & Register definitions
    */
       
   #define PCI_REG_DPTconfig                       0x40
   #define PCI_REG_PumpModeAddress                 0x44
   #define PCI_REG_PumpModeData                    0x48
   #define PCI_REG_ConfigParam1                    0x50
   #define PCI_REG_ConfigParam2                    0x54
   
   #define EATA_CMD_PIO_SETUPTEST                  0xc6
   #define EATA_CMD_PIO_READ_CONFIG                0xf0
   #define EATA_CMD_PIO_SET_CONFIG                 0xf1
   #define EATA_CMD_PIO_SEND_CP                    0xf2
   #define EATA_CMD_PIO_RECEIVE_SP                 0xf3
   #define EATA_CMD_PIO_TRUNC                      0xf4
   
   #define EATA_CMD_RESET                          0xf9
   #define EATA_COLD_BOOT                          0x06 /* Last resort only! */
   
   #define EATA_CMD_IMMEDIATE                      0xfa
   
   #define EATA_CMD_DMA_READ_CONFIG                0xfd
   #define EATA_CMD_DMA_SET_CONFIG                 0xfe
   #define EATA_CMD_DMA_SEND_CP                    0xff
   
   #define ECS_EMULATE_SENSE                       0xd4
   
   /*
    * Immediate Commands
    * Beware of this enumeration.  Not all commands are in sequence!
    */
   
   enum dpt_immediate_cmd {
       EATA_GENERIC_ABORT,
       EATA_SPECIFIC_RESET,
       EATA_BUS_RESET,
       EATA_SPECIFIC_ABORT,
       EATA_QUIET_INTR,
       EATA_SMART_ROM_DL_EN,
       EATA_COLD_BOOT_HBA, /* Only as a last resort        */
       EATA_FORCE_IO,
       EATA_SCSI_BUS_OFFLINE,
       EATA_RESET_MASKED_BUS,
       EATA_POWER_OFF_WARN
   };
   
   extern enum dpt_immediate_cmd dpt_immediate_cmd;
   
   #define HA_CTRLREG              0x206 /* control register for HBA */
   #define HA_CTRL_DISINT          0x02  /* CTRLREG: disable interrupts */
   #define HA_CTRL_RESCPU          0x04  /* CTRLREG: reset processo */
   #define HA_CTRL_8HEADS          0x08  /*
                                          * CTRLREG: set for drives with
                                          * >=8 heads
                                          * (WD1003 rudimentary :-)
                                          */
   
   #define HA_WCOMMAND             0x07  /* command register offset        */
   #define HA_WIFC                 0x06  /* immediate command offset       */
   #define HA_WCODE                0x05
   #define HA_WCODE2               0x04
   #define HA_WDMAADDR             0x02  /* DMA address LSB offset */
   #define HA_RERROR               0x01  /* Error Register, offset 1 from base */
   #define HA_RAUXSTAT             0x08  /* aux status register offset */
   #define HA_RSTATUS              0x07  /* status register offset */
   #define HA_RDATA                0x00  /* data register (16bit)  */
   #define HA_WDATA                0x00  /* data register (16bit)  */
   
   #define HA_ABUSY                0x01  /* aux busy bit           */
   #define HA_AIRQ                 0x02  /* aux IRQ pending bit    */
   #define HA_SERROR               0x01  /* pr. command ended in error */
   #define HA_SMORE                0x02  /* more data soon to come */
   #define HA_SCORR                0x04  /* datio_addra corrected  */
   #define HA_SDRQ                 0x08  /* data request active    */
   #define HA_SSC                  0x10  /* seek complete          */
   #define HA_SFAULT               0x20  /* write fault            */
   #define HA_SREADY               0x40  /* drive ready            */
   #define HA_SBUSY                0x80  /* drive busy             */
   #define HA_SDRDY                (HA_SSC|HA_SREADY|HA_SDRQ)
   
   /*
    * Message definitions  
    */
   
   enum dpt_message {
           HA_NO_ERROR,            /* No Error                             */
           HA_ERR_SEL_TO,          /* Selection Timeout                    */
           HA_ERR_CMD_TO,          /* Command Timeout                      */
           HA_SCSIBUS_RESET,
           HA_HBA_POWER_UP,        /* Initial Controller Power-up          */
           HA_UNX_BUSPHASE,        /* Unexpected Bus Phase                 */
           HA_UNX_BUS_FREE,        /* Unexpected Bus Free                  */
           HA_BUS_PARITY,          /* Bus Parity Error                     */
           HA_SCSI_HUNG,           /* SCSI Hung                            */
           HA_UNX_MSGRJCT,         /* Unexpected Message Rejected          */
           HA_RESET_STUCK,         /* SCSI Bus Reset Stuck                 */
           HA_RSENSE_FAIL,         /* Auto Request-Sense Failed            */
           HA_PARITY_ERR,          /* Controller Ram Parity Error          */
           HA_CP_ABORT_NA,         /* Abort Message sent to non-active cmd */
           HA_CP_ABORTED,          /* Abort Message sent to active cmd     */
           HA_CP_RESET_NA,         /* Reset Message sent to non-active cmd */
           HA_CP_RESET,            /* Reset Message sent to active cmd     */
           HA_ECC_ERR,             /* Controller Ram ECC Error             */
           HA_PCI_PARITY,          /* PCI Parity Error                     */
           HA_PCI_MABORT,          /* PCI Master Abort                     */
           HA_PCI_TABORT,          /* PCI Target Abort                     */
           HA_PCI_STABORT          /* PCI Signaled Target Abort            */
   };
   
   extern enum dpt_message dpt_message;
   
   #define HA_STATUS_MASK          0x7F
   #define HA_IDENTIFY_MSG         0x80
   #define HA_DISCO_RECO           0x40            /* Disconnect/Reconnect         */
   
   #define DPT_RW_BUFF_HEART       0X00
   #define DPT_RW_BUFF_DLM         0x02
   #define DPT_RW_BUFF_ACCESS      0x03
   
   #define HA_INTR_OFF             1
   #define HA_INTR_ON              0
   
   /* This is really a one-time shot through some black magic */
   #define DPT_EATA_REVA 0x1c
   #define DPT_EATA_REVB 0x1e
   #define DPT_EATA_REVC 0x22
   #define DPT_EATA_REVZ 0x24
   
   
   /* IOCTL List */
   
   #define DPT_RW_CMD_LEN                  32
   #define DPT_RW_CMD_DUMP_SOFTC           "dump softc"
   #define DPT_RW_CMD_DUMP_SYSINFO         "dump sysinfo"
   #define DPT_RW_CMD_DUMP_METRICS         "dump metrics"
   #define DPT_RW_CMD_CLEAR_METRICS        "clear metrics"
   #define DPT_RW_CMD_SHOW_LED             "show LED"
   
   #define DPT_IOCTL_INTERNAL_METRICS      _IOR('D',  1, dpt_perf_t)
   #define DPT_IOCTL_SOFTC                 _IOR('D',  2, dpt_user_softc_t) 
   #define DPT_IOCTL_SEND                  _IOWR('D', 3, eata_pt_t)
   #define SDI_SEND                        0x40044444 /* Observed from dptmgr */
   
   /*
    *      Other   definitions
    */
   
   #define DPT_HCP_LENGTH(page)    (ntohs(*(int16_t *)(void *)(&page[2]))+4)
   #define DPT_HCP_FIRST(page)     (&page[4])
   #define DPT_HCP_NEXT(param)     (&param[3 + param[3] + 1])
   #define DPT_HCP_CODE(param)     (ntohs(*(int16_t *)(void *)param))
   
   
   /* Possible return values from dpt_register_buffer() */
   
   #define SCSI_TM_READ_BUFFER     0x3c
   #define SCSI_TM_WRITE_BUFFER    0x3b
   
   #define SCSI_TM_MODE_MASK       0x07  /* Strip off reserved and LUN */
   #define SCSI_TM_LUN_MASK        0xe0  /* Strip off reserved and LUN */
   
   typedef enum {
           SUCCESSFULLY_REGISTERED,
           DRIVER_DOWN,
           ALREADY_REGISTERED,
           REGISTERED_TO_ANOTHER,
           NOT_REGISTERED, 
           INVALID_UNIT,
           INVALID_SENDER,
           INVALID_CALLBACK,
           NO_RESOURCES
   } dpt_rb_t;
   
   typedef enum {
           REGISTER_BUFFER,
           RELEASE_BUFFER
   } dpt_rb_op_t;
   
   /*
    * New way for completion routines to reliably copmplete processing.
    * Should take properly typed dpt_softc_t and dpt_ccb_t,
    * but interdependencies preclude that.
    */
   typedef void (*ccb_callback)(void *dpt, int bus, void *ccb);
   
   typedef void (*buff_wr_done)(int unit, u_int8_t channel, u_int8_t target,
                                u_int8_t lun, u_int16_t offset, u_int16_t length,
                                int result);
   
   typedef void (*dpt_rec_buff)(int unit, u_int8_t channel, u_int8_t target,
                                u_int8_t lun, void *buffer, u_int16_t offset,
                                u_int16_t length);
   
   /* HBA's Status port (register) bitmap */
   typedef struct reg_bit {   /* reading this one will clear the interrupt */
           u_int8_t error :1, /* previous command ended in an error */
                    more  :1, /* More DATA coming soon Poll BSY & DRQ (PIO) */
                    corr  :1, /* data read was successfully corrected with ECC */
                    drq   :1, /* data request active */
                    sc    :1, /* seek complete */
                    fault :1, /* write fault */
                    ready :1, /* drive ready */
                    busy  :1; /* controller busy */
   } dpt_status_reg_t;
   
   /* HBA's Auxiliary status port (register) bitmap */
   typedef struct reg_abit {  /* reading this won't clear the interrupt */
           u_int8_t abusy :1, /* auxiliary busy */
                    irq   :1, /* set when drive interrupt is asserted */
                          :6;
   } dpt_aux_status_t;
   
   /* The EATA Register Set as a structure */
   typedef struct eata_register {
           u_int8_t data_reg[2];   /* R, couldn't figure this one out */
           u_int8_t cp_addr[4];    /* W, CP address register */
           union {
                   u_int8_t command; /*
                                      * W, command code:
                                      * [read|set] conf, send CP
                                      */
                   struct   reg_bit status; /* R, see register_bit1 */
                   u_int8_t statusbyte;
           } ovr;
           struct reg_abit aux_stat; /* R, see register_bit2 */
   } eata_reg_t;
   
   /*
    * Holds the results of a READ_CONFIGURATION command
    * Beware of data items which are larger than 1 byte.
    * these come from the DPT in network order.
    * On an Intel ``CPU'' they will be upside down and backwards!
    * The dpt_get_conf function is normally responsible for flipping
    * Everything back.
    */
   typedef struct get_conf {  /* Read Configuration Array */
           union {
                   struct {
                           u_int8_t foo_DevType;
                           u_int8_t foo_PageCode;
                           u_int8_t foo_Reserved0; 
                           u_int8_t foo_len;
                   } foo;
                   u_int32_t foo_length;   /* Should return 0x22, 0x24, etc */
           } bar;
   #define gcs_length              bar.foo_length
   #define gcs_PageCode            bar.foo.foo_DevType
   #define gcs_reserved0           bar.foo.foo_Reserved0
   #define gcs_len                 bar.foo.foo_len
   
           u_int32_t signature;    /* Signature MUST be "EATA".    ntohl()`ed */
   
           u_int8_t  version2 :4,
                     version  :4;  /* EATA Version level */
   
           u_int8_t  OCS_enabled :1, /* Overlap Command Support enabled */
                     TAR_support :1, /* SCSI Target Mode supported */
                     TRNXFR      :1, /* Truncate Transfer Cmd Used in PIO Mode */
                     MORE_support:1, /* MORE supported (PIO Mode Only) */
                     DMA_support :1, /* DMA supported */
                     DMA_valid   :1, /* DRQ value in Byte 30 is valid */
                     ATA         :1, /* ATA device connected (not supported) */
                     HAA_valid   :1; /* Hostadapter Address is valid */
   
           u_int16_t cppadlen; /*
                                * Number of pad bytes send after CD data set
                                * to zero for DMA commands. Ntohl()`ed
                                */
           u_int8_t  scsi_idS; /* SCSI ID of controller 2-0 Byte 0 res. */
           u_int8_t  scsi_id2; /* If not, zero is returned */
           u_int8_t  scsi_id1;
           u_int8_t  scsi_id0;
           u_int32_t cplen;    /* CP length: number of valid cp bytes */
   
           u_int32_t splen;    /* Returned bytes for a received SP command */
           u_int16_t queuesiz; /* max number of queueable CPs */
   
           u_int16_t dummy;
           u_int16_t SGsiz;        /* max number of SG table entrie */
   
           u_int8_t  IRQ        :4,/* IRQ used this HBA */
                     IRQ_TR     :1,/* IRQ Trigger: 0=edge, 1=level  */
                     SECOND     :1,/* This is a secondary controller */
                     DMA_channel:2;/* DRQ index, DRQ is 2comp of DRQX */
   
           u_int8_t  sync;         /* 0-7 sync active bitmask (deprecated) */
           u_int8_t  DSBLE   :1,   /* ISA i/o addressing is disabled */
                     FORCADR :1,   /* i/o address has been forced */
                     SG_64K  :1,
                     SG_UAE  :1,
                             :4;
   
           u_int8_t  MAX_ID   :5,  /* Max number of SCSI target IDs */
                     MAX_CHAN :3;  /* Number of SCSI busses on HBA  */
   
           u_int8_t  MAX_LUN;      /* Max number of LUNs */
           u_int8_t          :3,
                     AUTOTRM :1,
                     M1_inst :1,
                     ID_qest :1,   /* Raidnum ID is questionable */
                     is_PCI  :1,   /* HBA is PCI */
                     is_EISA :1;   /* HBA is EISA */
   
           u_int8_t  RAIDNUM;      /* unique HBA identifier */
           u_int8_t  unused[4];    /* When doing PIO, you  GET 512 bytes */
       
           /* >>------>>   End of The DPT structure        <<------<< */
   
           u_int32_t length;       /* True length, after ntohl conversion  */
   } dpt_conf_t;
   
   /* Scatter-Gather list entry */
   typedef struct dpt_sg_segment {
           u_int32_t seg_addr;     /* All fields in network byte order */
           u_int32_t seg_len;
   } dpt_sg_t;
   
   
   /* Status Packet */
   typedef struct eata_sp {
           u_int8_t  hba_stat :7,  /* HBA status */
                     EOC     :1;   /* True if command finished */
   
           u_int8_t  scsi_stat;    /* Target SCSI status */
   
           u_int8_t  reserved[2];
   
           u_int32_t residue_len;  /* Number of bytes not transferred */
   
           u_int32_t ccb_busaddr;
   
           u_int8_t  sp_ID_Message;
           u_int8_t  sp_Que_Message;
           u_int8_t  sp_Tag_Message;
           u_int8_t  msg[9];
   } dpt_sp_t;
   
   /*
    * A strange collection of O/S-Hardware releated bits and pieces.
    * Used by the dpt_ioctl() entry point to return DPT_SYSINFO command.
    */
   typedef struct dpt_drive_parameters {
           u_int16_t cylinders; /* Up to 1024 */
           u_int8_t  heads;     /* Up to 255  */
           u_int8_t  sectors;   /* Up to 63   */
   } dpt_drive_t;
   
   typedef struct driveParam_S driveParam_T;
   
   #define SI_CMOS_Valid           0x0001
   #define SI_NumDrivesValid       0x0002
   #define SI_ProcessorValid       0x0004
   #define SI_MemorySizeValid      0x0008
   #define SI_DriveParamsValid     0x0010
   #define SI_SmartROMverValid     0x0020
   #define SI_OSversionValid       0x0040
   #define SI_OSspecificValid      0x0080  
   #define SI_BusTypeValid         0x0100
   
   #define SI_ALL_VALID            0x0FFF
   #define SI_NO_SmartROM          0x8000
   
   #define SI_ISA_BUS              0x00
   #define SI_MCA_BUS              0x01
   #define SI_EISA_BUS             0x02
   #define SI_PCI_BUS              0x04
   
   #define HBA_BUS_ISA             0x00
   #define HBA_BUS_EISA            0x01
   #define HBA_BUS_PCI             0x02
   
   typedef struct dpt_sysinfo {
           u_int8_t    drive0CMOS;                 /* CMOS Drive 0 Type */
           u_int8_t    drive1CMOS;                 /* CMOS Drive 1 Type */
           u_int8_t    numDrives;                  /* 0040:0075 contents */
           u_int8_t    processorFamily;            /* Same as DPTSIG definition */
           u_int8_t    processorType;              /* Same as DPTSIG definition */
           u_int8_t    smartROMMajorVersion;
           u_int8_t    smartROMMinorVersion;       /* SmartROM version */
           u_int8_t    smartROMRevision;
           u_int16_t   flags;                      /* See bit definitions above */
           u_int16_t   conventionalMemSize;        /* in KB */
           u_int32_t   extendedMemSize;            /* in KB */
           u_int32_t   osType;                     /* Same as DPTSIG definition */
           u_int8_t    osMajorVersion;
           u_int8_t    osMinorVersion;             /* The OS version */
           u_int8_t    osRevision;
           u_int8_t    osSubRevision;
           u_int8_t    busType;                    /* See defininitions above */
           u_int8_t    pad[3];                     /* For alignment */
           dpt_drive_t drives[16];                 /* SmartROM Logical Drives */
   } dpt_sysinfo_t;
   
   /* SEND_COMMAND packet structure */
   typedef struct eata_ccb {
           u_int8_t SCSI_Reset   :1, /* Cause a SCSI Bus reset on the cmd */
                    HBA_Init     :1, /* Cause Controller to reinitialize */
                    Auto_Req_Sen :1, /* Do Auto Request Sense on errors */
                    scatter      :1, /* Data Ptr points to a SG Packet */
                    Quick        :1, /* Set this one for NO Status PAcket */
                    Interpret    :1, /* Interpret the SCSI cdb for own use */
                    DataOut      :1, /* Data Out phase with command */
                    DataIn       :1; /* Data In phase with command */
   
           u_int8_t reqlen;          /* Request Sense Length, if Auto_Req_Sen=1 */
           u_int8_t unused[3];
           u_int8_t FWNEST  :1,      /* send cmd to phys RAID component */
                    unused2 :7;
   
           u_int8_t Phsunit        :1, /* physical unit on mirrored pair */
                    I_AT           :1, /* inhibit address translation  */
                    Disable_Cache  :1, /* HBA inhibit caching */
                                   :5;
   
           u_int8_t cp_id          :5, /* SCSI Device ID of target */
                    cp_channel     :3; /* SCSI Channel # of HBA */
   
           u_int8_t cp_LUN         :5,
                    cp_luntar      :1, /* CP is for target ROUTINE */
                    cp_dispri      :1, /* Grant disconnect privilege */
                    cp_identify    :1; /* Always TRUE */
   
           u_int8_t cp_msg[3];     /* Message bytes 0-3 */
   
           union {
                   struct {
                           u_int8_t x_scsi_cmd; /* Partial SCSI CDB def */
   
                           u_int8_t x_extent  :1,
                                    x_bytchk  :1,
                                    x_reladr  :1,
                                    x_cmplst  :1,
                                    x_fmtdata :1,
                                    x_lun     :3;
   
                           u_int8_t x_page;
                           u_int8_t reserved4;
                           u_int8_t x_len;
                           u_int8_t x_link    :1;
                           u_int8_t x_flag    :1;
                           u_int8_t reserved5 :4;
                           u_int8_t x_vendor  :2;
                   } x;
                   u_int8_t z[12]; /* Command Descriptor Block (= 12) */
           } cp_w;
   
   #define cp_cdb          cp_w.z
   #define cp_scsi_cmd     cp_w.x.x_scsi_cmd
   #define cp_extent       cp_w.x.x_extent
   #define cp_lun          cp_w.x.x_lun
   #define cp_page         cp_w.x.x_page 
   #define cp_len          cp_w.x.x_len
   
   #define MULTIFUNCTION_CMD       0x0e    /* SCSI Multi Function Cmd */
   #define BUS_QUIET               0x04    /* Quite Scsi Bus Code     */
   #define BUS_UNQUIET             0x05    /* Un Quiet Scsi Bus Code  */
   
           u_int32_t cp_datalen;   /*
                                    * Data Transfer Length. If scatter=1 len (IN
                                    * BYTES!) of the S/G array
                                    */
   
           u_int32_t cp_busaddr;   /* Unique identifier.  Busaddr works well */
           u_int32_t cp_dataDMA;   /*
                                    * Data Address, if scatter=1 then it is the
                                    * address of scatter packet
                                    */
           u_int32_t cp_statDMA;   /* address for Status Packet */
           u_int32_t cp_reqDMA;    /*
                                    * Request Sense Address, used if CP command
                                    * ends with error
                                    */
           u_int8_t  CP_OpCode;
           
   } eata_ccb_t;
   
   /* 
    * DPT Signature Structure.
    * Used by /dev/dpt to directly pass commands to the HBA
    * We have more information here than we care for...
    */
   
   /* Current Signature Version - sigBYTE dsSigVersion; */
   #define SIG_VERSION 1
   
   /* 
    * Processor Family - sigBYTE dsProcessorFamily;        DISTINCT VALUE 
    *
    * What type of processor the file is meant to run on.
    * This will let us know whether to read sigWORDs as high/low or low/high.
    */
   #define PROC_INTEL      0x00    /* Intel 80x86 */
   #define PROC_MOTOROLA   0x01    /* Motorola 68K */
   #define PROC_MIPS4000   0x02    /* MIPS RISC 4000 */
   #define PROC_ALPHA      0x03    /* DEC Alpha */
   
   /* 
    * Specific Minimim Processor - sigBYTE dsProcessor; FLAG BITS 
    *
    * Different bit definitions dependent on processor_family
    */
   
   /* PROC_INTEL: */
   #define PROC_8086       0x01    /* Intel 8086 */
   #define PROC_286        0x02    /* Intel 80286 */
   #define PROC_386        0x04    /* Intel 80386 */
   #define PROC_486        0x08    /* Intel 80486 */
   #define PROC_PENTIUM    0x10    /* Intel 586 aka P5 aka Pentium */
   #define PROC_P6         0x20    /* Intel 686 aka P6 */
   
   /* PROC_MOTOROLA: */
   #define PROC_68000      0x01    /* Motorola 68000 */
   #define PROC_68020      0x02    /* Motorola 68020 */
   #define PROC_68030      0x04    /* Motorola 68030 */
   #define PROC_68040      0x08    /* Motorola 68040 */
   
   /* Filetype - sigBYTE dsFiletype; DISTINCT VALUES */
   #define FT_EXECUTABLE   0       /* Executable Program */
   #define FT_SCRIPT       1       /* Script/Batch File??? */
   #define FT_HBADRVR      2       /* HBA Driver */
   #define FT_OTHERDRVR    3       /* Other Driver */
   #define FT_IFS          4       /* Installable Filesystem Driver */
   #define FT_ENGINE       5       /* DPT Engine */
   #define FT_COMPDRVR     6       /* Compressed Driver Disk */
   #define FT_LANGUAGE     7       /* Foreign Language file */
   #define FT_FIRMWARE     8       /* Downloadable or actual Firmware */
   #define FT_COMMMODL     9       /* Communications Module */
   #define FT_INT13        10      /* INT 13 style HBA Driver */
   #define FT_HELPFILE     11      /* Help file */
   #define FT_LOGGER       12      /* Event Logger */
   #define FT_INSTALL      13      /* An Install Program */
   #define FT_LIBRARY      14      /* Storage Manager Real-Mode Calls */
   #define FT_RESOURCE     15      /* Storage Manager Resource File */
   #define FT_MODEM_DB     16      /* Storage Manager Modem Database */
   
   /* Filetype flags - sigBYTE dsFiletypeFlags;            FLAG BITS */
   #define FTF_DLL         0x01    /* Dynamic Link Library */
   #define FTF_NLM         0x02    /* Netware Loadable Module */
   #define FTF_OVERLAYS    0x04    /* Uses overlays */
   #define FTF_DEBUG       0x08    /* Debug version */
   #define FTF_TSR         0x10    /* TSR */
   #define FTF_SYS         0x20    /* DOS Lodable driver */
   #define FTF_PROTECTED   0x40    /* Runs in protected mode */
   #define FTF_APP_SPEC    0x80    /* Application Specific */
   
   /* OEM - sigBYTE dsOEM; DISTINCT VALUES */
   #define OEM_DPT         0       /* DPT */
   #define OEM_ATT         1       /* ATT */
   #define OEM_NEC         2       /* NEC */
   #define OEM_ALPHA       3       /* Alphatronix */
   #define OEM_AST         4       /* AST */
   #define OEM_OLIVETTI    5       /* Olivetti */
   #define OEM_SNI         6       /* Siemens/Nixdorf */
   
   /* Operating System     - sigLONG dsOS;         FLAG BITS */
   #define OS_DOS                  0x00000001 /* PC/MS-DOS */
   #define OS_WINDOWS              0x00000002 /* Microsoft Windows 3.x */
   #define OS_WINDOWS_NT           0x00000004 /* Microsoft Windows NT */
   #define OS_OS2M                 0x00000008 /* OS/2 1.2.x,MS 1.3.0,IBM 1.3.x */
   #define OS_OS2L                 0x00000010 /* Microsoft OS/2 1.301 - LADDR */
   #define OS_OS22x                0x00000020 /* IBM OS/2 2.x */
   #define OS_NW286                0x00000040 /* Novell NetWare 286 */
   #define OS_NW386                0x00000080 /* Novell NetWare 386 */
   #define OS_GEN_UNIX             0x00000100 /* Generic Unix */
   #define OS_SCO_UNIX             0x00000200 /* SCO Unix */
   #define OS_ATT_UNIX             0x00000400 /* ATT Unix */
   #define OS_UNIXWARE             0x00000800 /* UnixWare Unix */
   #define OS_INT_UNIX             0x00001000 /* Interactive Unix */
   #define OS_SOLARIS              0x00002000 /* SunSoft Solaris */
   #define OS_QN                   0x00004000 /* QNX for Tom Moch */
   #define OS_NEXTSTEP             0x00008000 /* NeXTSTEP */
   #define OS_BANYAN               0x00010000 /* Banyan Vines */
   #define OS_OLIVETTI_UNIX        0x00020000 /* Olivetti Unix */
   #define OS_FREEBSD              0x00040000 /* FreeBSD 2.2 and later */
   #define OS_OTHER                0x80000000 /* Other */
   
   /* Capabilities - sigWORD dsCapabilities; FLAG BITS */
   #define CAP_RAID0       0x0001  /* RAID-0 */
   #define CAP_RAID1       0x0002  /* RAID-1 */
   #define CAP_RAID3       0x0004  /* RAID-3 */
   #define CAP_RAID5       0x0008  /* RAID-5 */
   #define CAP_SPAN        0x0010  /* Spanning */
   #define CAP_PASS        0x0020  /* Provides passthrough */
   #define CAP_OVERLAP     0x0040  /* Passthrough supports overlapped commands */
   #define CAP_ASPI        0x0080  /* Supports ASPI Command Requests */
   #define CAP_ABOVE16MB   0x0100  /* ISA Driver supports greater than 16MB */
   #define CAP_EXTEND      0x8000  /* Extended info appears after description */
   
   /* Devices Supported - sigWORD dsDeviceSupp;            FLAG BITS */
   #define DEV_DASD        0x0001  /* DASD (hard drives) */
   #define DEV_TAPE        0x0002  /* Tape drives */
   #define DEV_PRINTER     0x0004  /* Printers */
   #define DEV_PROC        0x0008  /* Processors */
   #define DEV_WORM        0x0010  /* WORM drives */
   #define DEV_CDROM       0x0020  /* CD-ROM drives */
   #define DEV_SCANNER     0x0040  /* Scanners */
   #define DEV_OPTICAL     0x0080  /* Optical Drives */
   #define DEV_JUKEBOX     0x0100  /* Jukebox */
   #define DEV_COMM        0x0200  /* Communications Devices */
   #define DEV_OTHER       0x0400  /* Other Devices */
   #define DEV_ALL         0xFFFF  /* All SCSI Devices */
   
   /* Adapters Families Supported - sigWORD dsAdapterSupp; FLAG BITS */
   #define ADF_2001        0x0001  /* PM2001 */
   #define ADF_2012A       0x0002  /* PM2012A */
   #define ADF_PLUS_ISA    0x0004  /* PM2011,PM2021 */
   #define ADF_PLUS_EISA   0x0008  /* PM2012B,PM2022 */
   #define ADF_SC3_ISA     0x0010  /* PM2021 */
   #define ADF_SC3_EISA    0x0020  /* PM2022,PM2122, etc */
   #define ADF_SC3_PCI     0x0040  /* SmartCache III PCI */
   #define ADF_SC4_ISA     0x0080  /* SmartCache IV ISA */
   #define ADF_SC4_EISA    0x0100  /* SmartCache IV EISA */
   #define ADF_SC4_PCI     0x0200  /* SmartCache IV PCI */
   #define ADF_ALL_MASTER  0xFFFE  /* All bus mastering */
   #define ADF_ALL_CACHE   0xFFFC  /* All caching */
   #define ADF_ALL         0xFFFF  /* ALL DPT adapters */
   
   /* Application - sigWORD dsApplication;                         FLAG BITS */
   #define APP_DPTMGR      0x0001  /* DPT Storage Manager */
   #define APP_ENGINE      0x0002  /* DPT Engine */
   #define APP_SYTOS       0x0004  /* Sytron Sytos Plus */
   #define APP_CHEYENNE    0x0008  /* Cheyenne ARCServe + ARCSolo */
   #define APP_MSCDEX      0x0010  /* Microsoft CD-ROM extensions */
   #define APP_NOVABACK    0x0020  /* NovaStor Novaback */
   #define APP_AIM         0x0040  /* Archive Information Manager */
   
   /* Requirements - sigBYTE dsRequirements;       FLAG BITS */
   #define REQ_SMARTROM    0x01    /* Requires SmartROM to be present */
   #define REQ_DPTDDL      0x02    /* Requires DPTDDL.SYS to be loaded */
   #define REQ_HBA_DRIVER  0x04    /* Requires an HBA driver to be loaded  */
   #define REQ_ASPI_TRAN   0x08    /* Requires an ASPI Transport Modules   */
   #define REQ_ENGINE      0x10    /* Requires a DPT Engine to be loaded   */
   #define REQ_COMM_ENG    0x20    /* Requires a DPT Communications Engine */
   
   typedef struct dpt_sig {
           char      dsSignature[6];  /* ALWAYS "dPtSiG" */
           u_int8_t  SigVersion;      /* signature version (currently 1) */
           u_int8_t  ProcessorFamily; /* what type of processor */
           u_int8_t  Processor;       /* precise processor */
           u_int8_t  Filetype;        /* type of file */
           u_int8_t  FiletypeFlags;   /* flags to specify load type, etc. */
           u_int8_t  OEM;             /* OEM file was created for */
           u_int32_t OS;              /* which Operating systems */
           u_int16_t Capabilities;    /* RAID levels, etc. */
           u_int16_t DeviceSupp;      /* Types of SCSI devices supported */
           u_int16_t AdapterSupp;     /* DPT adapter families supported */
           u_int16_t Application;     /* applications file is for */
           u_int8_t  Requirements;    /* Other driver dependencies */
           u_int8_t  Version;         /* 1 */
           u_int8_t  Revision;        /* 'J' */
           u_int8_t  SubRevision;     /* '9', ' ' if N/A */
           u_int8_t  Month;           /* creation month */
           u_int8_t  Day;             /* creation day */
           u_int8_t  Year;            /* creation year since 1980  */
           char     *Description;     /* description (NULL terminated) */
   } dpt_sig_t;
   
   /* 32 bytes minimum - with no description. Put NULL at description[0] */
   /* 81 bytes maximum - with 49 character description plus NULL. */
   
   /* This line added at Roycroft's request */
   /* Microsoft's NT compiler gets confused if you do a pack and don't */
   /* restore it. */
   typedef struct eata_pass_through {
           u_int8_t    eataID[4];
           u_int32_t   command;
   
   #define EATAUSRCMD      (('D'<<8)|65)   /* EATA PassThrough Command     */
   #define DPT_SIGNATURE   (('D'<<8)|67)   /* Get Signature Structure */
   #define DPT_NUMCTRLS    (('D'<<8)|68)   /* Get Number Of DPT Adapters */
   #define DPT_CTRLINFO    (('D'<<8)|69)   /* Get Adapter Info Structure */ 
   #define DPT_SYSINFO     (('D'<<8)|72)   /* Get System Info Structure    */
   #define DPT_BLINKLED    (('D'<<8)|75)   /* Get The BlinkLED Status */
   
           u_int8_t   *command_buffer;
           eata_ccb_t  command_packet;
           u_int32_t   timeout;
           u_int8_t    host_status;
           u_int8_t    target_status;
           u_int8_t    retries;
   } eata_pt_t;
   
   typedef enum {
           DCCB_FREE               = 0x00,
           DCCB_ACTIVE             = 0x01,
           DCCB_RELEASE_SIMQ       = 0x02
   } dccb_state;
   
   typedef struct dpt_ccb {
           eata_ccb_t       eata_ccb;
           bus_dmamap_t     dmamap;
           dpt_sg_t        *sg_list;
           u_int32_t        sg_busaddr;
           dccb_state       state;
           union            ccb *ccb;
           struct           scsi_sense_data sense_data;
           u_int8_t         tag;
           u_int8_t         retries;
           u_int8_t         status; /* status of this queueslot */
           u_int8_t        *cmd;    /* address of cmd */
   
           u_int32_t        transaction_id;
           u_int32_t        result;
           caddr_t          data;
           SLIST_ENTRY(dpt_ccb) links;
   
   #ifdef DPT_MEASURE_PERFORMANCE
           u_int32_t        submitted_time;
           struct           timeval command_started;
           struct           timeval command_ended;
   #endif
   } dpt_ccb_t;
   
   /*
    * This is provided for compatibility with UnixWare only.
    * Some of the fields may be bogus.
    * Others may have a totally different meaning.
    */
   typedef struct dpt_scsi_ha {
       u_int32_t    ha_state;              /* Operational state */
       u_int8_t     ha_id[MAX_CHANNELS];   /* Host adapter SCSI ids */
       int32_t      ha_base;               /* Base I/O address */
       int          ha_max_jobs;           /* Max number of Active Jobs */
       int          ha_cache:2;            /* Cache parameters */
       int          ha_cachesize:30;       /* In meg, only if cache present*/
       int          ha_nbus;               /* Number Of Busses on HBA */
       int          ha_ntargets;           /* Number Of Targets Supported */
       int          ha_nluns;              /* Number Of LUNs Supported */
       int          ha_tshift;             /* Shift value for target */
       int          ha_bshift;             /* Shift value for bus */
       int          ha_npend;              /* # of jobs sent to HBA */
       int          ha_active_jobs;        /* Number Of Active Jobs */
       char         ha_fw_version[4];      /* Firmware Revision Level */
       void        *ha_ccb;                /* Controller command blocks */
       void        *ha_cblist;             /* Command block free list */
       void        *ha_dev;                /* Logical unit queues */
       void        *ha_StPkt_lock;         /* Status Packet Lock */
       void        *ha_ccb_lock;           /* CCB Lock */
       void        *ha_LuQWaiting;         /* Lu Queue Waiting List */
       void        *ha_QWait_lock;         /* Device Que Waiting Lock */
       int          ha_QWait_opri;         /* Saved Priority Level */
   #ifdef DPT_TARGET_MODE
       dpt_ccb_t   *target_ccb[MAX_CHANNELS]; /* Command block waiting writebuf */
   #endif
   } dpt_compat_ha_t;
   
   /*
    * Describe the Inquiry Data returned on Page 0 from the Adapter. The
    * Page C1 Inquiry Data is described in the DptConfig_t structure above.
    */
   typedef struct {
       u_int8_t    deviceType;
       u_int8_t    rm_dtq;
       u_int8_t    otherData[6];
       u_int8_t    vendor[8];
       u_int8_t    modelNum[16];
       u_int8_t    firmware[4];
       u_int8_t    protocol[4];
   } dpt_inq_t;
   
   /*
    * sp_EOC is not `safe', so I will check sp_Messages[0] instead!
    */
   #define DptStat_BUSY(x)  ((x)->sp_ID_Message)
   #define DptStat_Reset_BUSY(x)                   \
    ((x)->msg[0] = 0xA5, (x)->EOC = 0,             \
     (x)->ccb_busaddr = ~0)
   
   #ifdef DPT_MEASURE_PERFORMANCE
   #define BIG_ENOUGH      0x8fffffff      
   typedef struct dpt_metrics {
           u_int32_t command_count[256]; /* We assume MAX 256 SCSI commands */
           u_int32_t max_command_time[256];
           u_int32_t min_command_time[256];
   
           u_int32_t min_intr_time;
           u_int32_t max_intr_time;
           u_int32_t aborted_interrupts;
           u_int32_t spurious_interrupts;
   
           u_int32_t max_waiting_count;
           u_int32_t max_submit_count;
           u_int32_t max_complete_count;
       
           u_int32_t min_waiting_time;
           u_int32_t min_submit_time;
           u_int32_t min_complete_time;
       
           u_int32_t max_waiting_time; 
           u_int32_t max_submit_time;
           u_int32_t max_complete_time;
       
           u_int32_t command_collisions;
           u_int32_t command_too_busy;
           u_int32_t max_eata_tries;
           u_int32_t min_eata_tries;
   
           u_int32_t read_by_size_count[10];
           u_int32_t write_by_size_count[10];
           u_int32_t read_by_size_min_time[10];
           u_int32_t read_by_size_max_time[10];
           u_int32_t write_by_size_min_time[10];
           u_int32_t write_by_size_max_time[10];
   
   #define SIZE_512        0
   #define SIZE_1K         1
  #define SIZE_2K         2
  #define SIZE_4K         3
  #define SIZE_8K         4
  #define SIZE_16K        5
  #define SIZE_32K        6
  #define SIZE_64K        7
  #define SIZE_BIGGER     8
  #define SIZE_OTHER      9
  
          struct    timeval intr_started;
  
          u_int32_t warm_starts;
          u_int32_t cold_boots;
  } dpt_perf_t;
  #endif
  
  struct sg_map_node {
          bus_dmamap_t             sg_dmamap;
          bus_addr_t               sg_physaddr;
          dpt_sg_t*                sg_vaddr;
          SLIST_ENTRY(sg_map_node) links;
  };
  
  /* Main state machine and interface structure */
  typedef struct dpt_softc {
          bus_space_tag_t    tag;
          bus_space_handle_t bsh;
          bus_dma_tag_t      buffer_dmat;         /* dmat for buffer I/O */
          dpt_ccb_t         *dpt_dccbs;           /* Array of dpt ccbs */
          bus_addr_t         dpt_ccb_busbase;     /* phys base address of array */
          bus_addr_t         dpt_ccb_busend;      /* phys end address of array */
  
          u_int32_t handle_interrupts   :1, /* Are we ready for real work? */
                    target_mode_enabled :1,
                    resource_shortage   :1,
                    cache_type          :2,
                    spare               :28;
  
          int       total_dccbs;
          int       free_dccbs;
          int       pending_ccbs;
          int       completed_ccbs;
  
          SLIST_HEAD(, dpt_ccb)    free_dccb_list;
          LIST_HEAD(, ccb_hdr)     pending_ccb_list;
  
          bus_dma_tag_t             parent_dmat;
          bus_dma_tag_t             dccb_dmat;    /* dmat for our ccb array */
          bus_dmamap_t              dccb_dmamap;
          bus_dma_tag_t             sg_dmat;      /* dmat for our sg maps */
          SLIST_HEAD(, sg_map_node) sg_maps;
  
          struct cam_sim            *sims[MAX_CHANNELS];
          struct cam_path           *paths[MAX_CHANNELS];
          u_int32_t commands_processed;
          u_int32_t lost_interrupts;
  
          /*
           * These three parameters can be used to allow for wide scsi, and
           * for host adapters that support multiple busses. The first two
           * should be set to 1 more than the actual max id or lun (i.e. 8 for
           * normal systems).
           *
           * There is a FAT assumption here;  We assume that these will never 
           * exceed MAX_CHANNELS, MAX_TARGETS, MAX_LUNS
           */
          u_int     channels;     /* # of avail scsi chan. */
          u_int32_t max_id;
          u_int32_t max_lun;
  
          u_int8_t  irq;
          u_int8_t  dma_channel;
  
          TAILQ_ENTRY(dpt_softc) links;
          int       unit;
          int       init_level;
  
          /*
           * Every object on a unit can have a receiver, if it treats
           * us as a target.  We do that so that separate and independant
           * clients can consume received buffers.
           */
  
  #define DPT_RW_BUFFER_SIZE      (8 * 1024)
          dpt_ccb_t       *target_ccb[MAX_CHANNELS][MAX_TARGETS][MAX_LUNS];
          u_int8_t        *rw_buffer[MAX_CHANNELS][MAX_TARGETS][MAX_LUNS];
          dpt_rec_buff     buffer_receiver[MAX_CHANNELS][MAX_TARGETS][MAX_LUNS];
          
          dpt_inq_t        board_data;
          u_int8_t         EATA_revision;
          u_int8_t         bustype;       /* bustype of HBA        */
          u_int32_t        state;         /* state of HBA          */
  
  #define DPT_HA_FREE             0x00000000
  #define DPT_HA_OK               0x00000000
  #define DPT_HA_NO_TIMEOUT       0x00000000
  #define DPT_HA_BUSY             0x00000001
  #define DPT_HA_TIMEOUT          0x00000002
  #define DPT_HA_RESET            0x00000004
  #define DPT_HA_LOCKED           0x00000008
  #define DPT_HA_ABORTED          0x00000010
  #define DPT_HA_CONTROL_ACTIVE   0x00000020
  #define DPT_HA_SHUTDOWN_ACTIVE  0x00000040
  #define DPT_HA_COMMAND_ACTIVE   0x00000080
  #define DPT_HA_QUIET            0x00000100
  
  #ifdef DPT_LOST_IRQ
  #define DPT_LOST_IRQ_SET        0x10000000
  #define DPT_LOST_IRQ_ACTIVE     0x20000000
  #endif
          
  #ifdef DPT_HANDLE_TIMEOUTS
  #define DPT_HA_TIMEOUTS_SET     0x40000000
  #define DPT_HA_TIMEOUTS_ACTIVE  0x80000000
  #endif
  
          u_int8_t  primary;      /* true if primary */   
  
          u_int8_t  more_support          :1,     /* HBA supports MORE flag */
                    immediate_support     :1,     /* HBA supports IMMEDIATE */
                    broken_INQUIRY        :1,     /* EISA HBA w/broken INQUIRY */
                    spare2                :5;
  
          u_int8_t  resetlevel[MAX_CHANNELS];
          u_int32_t last_ccb;     /* Last used ccb */
          u_int32_t cplen;                /* size of CP in words */
          u_int16_t cppadlen;     /* pad length of cp */
          u_int16_t max_dccbs;
          u_int16_t sgsize;               /* Entries in the SG list */
          u_int8_t  hostid[MAX_CHANNELS]; /* SCSI ID of HBA */
          u_int32_t cache_size;
  
          volatile   dpt_sp_t *sp;                /* status packet */
          /* Copied from the status packet during interrupt handler */
          u_int8_t   hba_stat;
          u_int8_t   scsi_stat;   /* Target SCSI status */
          u_int32_t  residue_len; /* Number of bytes not transferred */
          bus_addr_t sp_physaddr;         /* phys address of status packet */
  
          /*
           * We put ALL conditional elements at the tail for the structure.
           * If we do not, then userland code will crash or trash based on which
           * kernel it is running with.
           * This isi most visible with usr/sbin/dpt_softc(8)
           */
  
  #ifdef DPT_MEASURE_PERFORMANCE
          dpt_perf_t performance;
  #endif
  
  #ifdef DPT_RESET_HBA
          struct timeval last_contact;
  #endif
  } dpt_softc_t;
  
  /*
   * This structure is used to pass dpt_softc contents to userland via the 
   * ioctl DPT_IOCTL_SOFTC.  The reason for this maddness, is that FreeBSD
   * (all BSDs ?) chose to actually assign a nasty meaning to the IOCTL word,
   * encoding 13 bits of it as size.  As dpt_softc_t is somewhere between
   * 8,594 and 8,600 (depends on options), we have to copy the data to
   * something less than 4KB long. This siliness also solves the problem of
   * varying definition of dpt_softc_t, As the variants are exluded from
   * dpt_user_softc.
   *
   * See dpt_softc_t above for enumerations, comments and such.
   */
  typedef struct dpt_user_softc {
          int       unit;
          u_int32_t handle_interrupts   :1, /* Are we ready for real work? */
                    target_mode_enabled :1,
                    spare               :30;
  
          int       total_ccbs_count;
          int       free_ccbs_count;
          int       waiting_ccbs_count; 
          int       submitted_ccbs_count;
          int       completed_ccbs_count;
  
          u_int32_t queue_status;
          u_int32_t free_lock;
          u_int32_t waiting_lock;
          u_int32_t submitted_lock; 
          u_int32_t completed_lock;
  
          u_int32_t commands_processed;
          u_int32_t lost_interrupts;
  
          u_int8_t  channels;
          u_int32_t max_id;
          u_int32_t max_lun;
  
          u_int16_t io_base; 
          u_int8_t *v_membase;
          u_int8_t *p_membase;
  
          u_int8_t  irq;
          u_int8_t  dma_channel;
  
          dpt_inq_t board_data;
          u_int8_t  EATA_revision;
          u_int8_t  bustype;
          u_int32_t state;
  
          u_int8_t  primary;
          u_int8_t  more_support      :1,
                    immediate_support :1,
                    broken_INQUIRY    :1,
                    spare2            :5;
  
          u_int8_t  resetlevel[MAX_CHANNELS];
          u_int32_t last_ccb;
          u_int32_t cplen;
          u_int16_t cppadlen;
          u_int16_t queuesize;
          u_int16_t sgsize;
          u_int8_t  hostid[MAX_CHANNELS];
          u_int32_t cache_type :2,
                    cache_size :30;
  } dpt_user_softc_t;
  
  /*
   * Externals:
   * These all come from dpt_scsi.c
   *
   */
  #ifdef _KERNEL
  /* This function gets the current hi-res time and returns it to the caller */
  static __inline struct timeval
  dpt_time_now(void)
  {
          struct timeval now;
  
          microtime(&now);
          return(now);
  }
  
  /*
   * Given a minor device number, get its SCSI Unit.
   */
  static __inline int
  dpt_minor2unit(int minor)
  {
          return(minor2hba(minor));
  }
  
  dpt_softc_t *dpt_minor2softc(int minor_no);
  
  #endif /* _KERNEL */
  
  /*
   * This function substracts one timval structure from another,
   * Returning the result in usec.
   * It assumes that less than 4 billion usecs passed form start to end.
   * If times are sensless, ~0 is returned.
   */
  static __inline u_int32_t
  dpt_time_delta(struct timeval start,
                 struct timeval end)
  {
      if (start.tv_sec > end.tv_sec)
          return(~0);
  
      if ( (start.tv_sec == end.tv_sec) && (start.tv_usec > end.tv_usec) )
          return(~0);
          
      return ( (end.tv_sec - start.tv_sec) * 1000000 +
               (end.tv_usec - start.tv_usec) );
  }
  
  extern TAILQ_HEAD(dpt_softc_list, dpt_softc) dpt_softcs;
  
  extern int              dpt_controllers_present;
  
  #ifdef _KERNEL
  dpt_softc_t *           dpt_alloc(device_t, bus_space_tag_t, bus_space_handle_t);
  #endif
  void                    dpt_free(struct dpt_softc *dpt);
  int                     dpt_init(struct dpt_softc *dpt);
  int                     dpt_attach(dpt_softc_t * dpt);
  void                    dpt_intr(void *arg);
  
  dpt_conf_t *            dpt_pio_get_conf(u_int32_t);
  
  #endif /* _DPT_H */

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