gdth.h

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    unchar      ai_protected;                   /* protection flag */
    unchar      ai_verify_state;                /* state of a parity verify */
    unchar      ai_ext_state;                   /* extended array drive state */
    unchar      ai_expand_state;                /* array expand state (>=2.18)*/
    unchar      ai_reserved[3];
} PACKED gdth_arrayinf_str;

/* get array drive list */
typedef struct {
    ulong32     controller_no;                  /* controller no. */
    unchar      cd_handle;                      /* master cachedrive */
    unchar      is_arrayd;                      /* Flag: is array drive? */
    unchar      is_master;                      /* Flag: is array master? */
    unchar      is_parity;                      /* Flag: is parity drive? */
    unchar      is_hotfix;                      /* Flag: is hotfix drive? */
    unchar      res[3];
} PACKED gdth_alist_str;

typedef struct {
    ulong32     entries_avail;                  /* allocated entries */
    ulong32     entries_init;                   /* returned entries */
    ulong32     first_entry;                    /* first entry number */
    ulong32     list_offset;                    /* offset of following list */
    gdth_alist_str list[1];                     /* list */
} PACKED gdth_arcdl_str;

/* cache info/config IOCTL */
typedef struct {
    ulong32     version;                        /* firmware version */
    ushort      state;                          /* cache state (on/off) */
    ushort      strategy;                       /* cache strategy */
    ushort      write_back;                     /* write back state (on/off) */
    ushort      block_size;                     /* cache block size */
} PACKED gdth_cpar_str;

typedef struct {
    ulong32     csize;                          /* cache size */
    ulong32     read_cnt;                       /* read/write counter */
    ulong32     write_cnt;
    ulong32     tr_hits;                        /* hits */
    ulong32     sec_hits;
    ulong32     sec_miss;                       /* misses */
} PACKED gdth_cstat_str;

typedef struct {
    gdth_cpar_str   cpar;
    gdth_cstat_str  cstat;
} PACKED gdth_cinfo_str;

/* cache drive info */
typedef struct {
    unchar      cd_name[8];                     /* cache drive name */
    ulong32     cd_devtype;                     /* SCSI devicetype */
    ulong32     cd_ldcnt;                       /* number of log. drives */
    ulong32     cd_last_error;                  /* last error */
    unchar      cd_initialized;                 /* drive is initialized */
    unchar      cd_removable;                   /* media is removable */
    unchar      cd_write_protected;             /* write protected */
    unchar      cd_flags;                       /* Pool Hot Fix? */
    ulong32     ld_blkcnt;                      /* number of blocks */
    ulong32     ld_blksize;                     /* blocksize */
    ulong32     ld_dcnt;                        /* number of disks */
    ulong32     ld_slave;                       /* log. drive index */
    ulong32     ld_dtype;                       /* type of logical drive */
    ulong32     ld_last_error;                  /* last error */
    unchar      ld_name[8];                     /* log. drive name */
    unchar      ld_error;                       /* error */
} PACKED gdth_cdrinfo_str;

/* OEM string */
typedef struct {
    ulong32     ctl_version;
    ulong32     file_major_version;
    ulong32     file_minor_version;
    ulong32     buffer_size;
    ulong32     cpy_count;
    ulong32     ext_error;
    ulong32     oem_id;
    ulong32     board_id;
} PACKED gdth_oem_str_params;

typedef struct {
    unchar      product_0_1_name[16];
    unchar      product_4_5_name[16];
    unchar      product_cluster_name[16];
    unchar      product_reserved[16];
    unchar      scsi_cluster_target_vendor_id[16];
    unchar      cluster_raid_fw_name[16];
    unchar      oem_brand_name[16];
    unchar      oem_raid_type[16];
    unchar      bios_type[13];
    unchar      bios_title[50];
    unchar      oem_company_name[37];
    ulong32     pci_id_1;
    ulong32     pci_id_2;
    unchar      validation_status[80];
    unchar      reserved_1[4];
    unchar      scsi_host_drive_inquiry_vendor_id[16];
    unchar      library_file_template[16];
    unchar      reserved_2[16];
    unchar      tool_name_1[32];
    unchar      tool_name_2[32];
    unchar      tool_name_3[32];
    unchar      oem_contact_1[84];
    unchar      oem_contact_2[84];
    unchar      oem_contact_3[84];
} PACKED gdth_oem_str;

typedef struct {
    gdth_oem_str_params params;
    gdth_oem_str        text;
} PACKED gdth_oem_str_ioctl;

/* board features */
typedef struct {
    unchar      chaining;                       /* Chaining supported */
    unchar      striping;                       /* Striping (RAID-0) supp. */
    unchar      mirroring;                      /* Mirroring (RAID-1) supp. */
    unchar      raid;                           /* RAID-4/5/10 supported */
} PACKED gdth_bfeat_str;

/* board info IOCTL */
typedef struct {
    ulong32     ser_no;                         /* serial no. */
    unchar      oem_id[2];                      /* OEM ID */
    ushort      ep_flags;                       /* eprom flags */
    ulong32     proc_id;                        /* processor ID */
    ulong32     memsize;                        /* memory size (bytes) */
    unchar      mem_banks;                      /* memory banks */
    unchar      chan_type;                      /* channel type */
    unchar      chan_count;                     /* channel count */
    unchar      rdongle_pres;                   /* dongle present? */
    ulong32     epr_fw_ver;                     /* (eprom) firmware version */
    ulong32     upd_fw_ver;                     /* (update) firmware version */
    ulong32     upd_revision;                   /* update revision */
    char        type_string[16];                /* controller name */
    char        raid_string[16];                /* RAID firmware name */
    unchar      update_pres;                    /* update present? */
    unchar      xor_pres;                       /* XOR engine present? */
    unchar      prom_type;                      /* ROM type (eprom/flash) */
    unchar      prom_count;                     /* number of ROM devices */
    ulong32     dup_pres;                       /* duplexing module present? */
    ulong32     chan_pres;                      /* number of expansion chn. */
    ulong32     mem_pres;                       /* memory expansion inst. ? */
    unchar      ft_bus_system;                  /* fault bus supported? */
    unchar      subtype_valid;                  /* board_subtype valid? */
    unchar      board_subtype;                  /* subtype/hardware level */
    unchar      ramparity_pres;                 /* RAM parity check hardware? */
} PACKED gdth_binfo_str; 

/* get host drive info */
typedef struct {
    char        name[8];                        /* host drive name */
    ulong32     size;                           /* size (sectors) */
    unchar      host_drive;                     /* host drive number */
    unchar      log_drive;                      /* log. drive (master) */
    unchar      reserved;
    unchar      rw_attribs;                     /* r/w attribs */
    ulong32     start_sec;                      /* start sector */
} PACKED gdth_hentry_str;

typedef struct {
    ulong32     entries;                        /* entry count */
    ulong32     offset;                         /* offset of entries */
    unchar      secs_p_head;                    /* sectors/head */
    unchar      heads_p_cyl;                    /* heads/cylinder */
    unchar      reserved;
    unchar      clust_drvtype;                  /* cluster drive type */
    ulong32     location;                       /* controller number */
    gdth_hentry_str entry[MAX_HDRIVES];         /* entries */
} PACKED gdth_hget_str;    


/* DPRAM structures */

/* interface area ISA/PCI */
typedef struct {
    unchar              S_Cmd_Indx;             /* special command */
    unchar volatile     S_Status;               /* status special command */
    ushort              reserved1;
    ulong32             S_Info[4];              /* add. info special command */
    unchar volatile     Sema0;                  /* command semaphore */
    unchar              reserved2[3];
    unchar              Cmd_Index;              /* command number */
    unchar              reserved3[3];
    ushort volatile     Status;                 /* command status */
    ushort              Service;                /* service(for async.events) */
    ulong32             Info[2];                /* additional info */
    struct {
        ushort          offset;                 /* command offs. in the DPRAM*/
        ushort          serv_id;                /* service */
    } PACKED comm_queue[MAXOFFSETS];            /* command queue */
    ulong32             bios_reserved[2];
    unchar              gdt_dpr_cmd[1];         /* commands */
} PACKED gdt_dpr_if;

/* SRAM structure PCI controllers */
typedef struct {
    ulong32     magic;                          /* controller ID from BIOS */
    ushort      need_deinit;                    /* switch betw. BIOS/driver */
    unchar      switch_support;                 /* see need_deinit */
    unchar      padding[9];
    unchar      os_used[16];                    /* OS code per service */
    unchar      unused[28];
    unchar      fw_magic;                       /* contr. ID from firmware */
} PACKED gdt_pci_sram;

/* SRAM structure EISA controllers (but NOT GDT3000/3020) */
typedef struct {
    unchar      os_used[16];                    /* OS code per service */
    ushort      need_deinit;                    /* switch betw. BIOS/driver */
    unchar      switch_support;                 /* see need_deinit */
    unchar      padding;
} PACKED gdt_eisa_sram;


/* DPRAM ISA controllers */
typedef struct {
    union {
        struct {
            unchar      bios_used[0x3c00-32];   /* 15KB - 32Bytes BIOS */
            ulong32     magic;                  /* controller (EISA) ID */
            ushort      need_deinit;            /* switch betw. BIOS/driver */
            unchar      switch_support;         /* see need_deinit */
            unchar      padding[9];
            unchar      os_used[16];            /* OS code per service */
        } PACKED dp_sram;
        unchar          bios_area[0x4000];      /* 16KB reserved for BIOS */
    } bu;
    union {
        gdt_dpr_if      ic;                     /* interface area */
        unchar          if_area[0x3000];        /* 12KB for interface */
    } u;
    struct {
        unchar          memlock;                /* write protection DPRAM */
        unchar          event;                  /* release event */
        unchar          irqen;                  /* board interrupts enable */
        unchar          irqdel;                 /* acknowledge board int. */
        unchar volatile Sema1;                  /* status semaphore */
        unchar          rq;                     /* IRQ/DRQ configuration */
    } PACKED io;
} PACKED gdt2_dpram_str;

/* DPRAM PCI controllers */
typedef struct {
    union {
        gdt_dpr_if      ic;                     /* interface area */
        unchar          if_area[0xff0-sizeof(gdt_pci_sram)];
    } u;
    gdt_pci_sram        gdt6sr;                 /* SRAM structure */
    struct {
        unchar          unused0[1];
        unchar volatile Sema1;                  /* command semaphore */
        unchar          unused1[3];
        unchar          irqen;                  /* board interrupts enable */
        unchar          unused2[2];