FreeBSD/Linux Kernel Cross Reference
sys/device/device_types.h

     /* 
      * Mach Operating System
      * Copyright (c) 1991,1990,1989 Carnegie Mellon University
      * All Rights Reserved.
      * 
      * Permission to use, copy, modify and distribute this software and its
      * documentation is hereby granted, provided that both the copyright
      * notice and this permission notice appear in all copies of the
      * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    /*
     * HISTORY
     * $Log:        device_types.h,v $
     * Revision 2.11  93/08/10  15:10:33  mrt
     *      Added io_buf_vec_t for scatter/gather IO.
     *      Looks like a struct iovec from BSD.
     *      [93/04/14            cmaeda]
     * 
     * Revision 2.10  93/01/14  17:26:50  danner
     *      Added dev_flavor_t.
     *      [92/11/30            af]
     * 
     * Revision 2.9  92/02/23  22:42:53  elf
     *      Added mandatory DEV_GET_SIZE getstatus operation.
     *      Must be implemented by all devices.
     *      [92/02/22  19:59:27  af]
     * 
     * Revision 2.8  91/07/31  17:33:54  dbg
     *      Fix dev_name_t to match definition in
     *      device/device_types.defs.
     *      [91/07/30  16:47:13  dbg]
     * 
     * Revision 2.7  91/05/14  15:43:20  mrt
     *      Correcting copyright
     * 
     * Revision 2.6  91/05/13  06:02:18  af
     *      Added D_READ_ONLY.
     *      [91/05/12  15:47:28  af]
     * 
     * Revision 2.5  91/02/05  17:09:13  mrt
     *      Changed to new Mach copyright
     *      [91/01/31  17:28:40  mrt]
     * 
     * Revision 2.4  90/06/02  14:47:52  rpd
     *      Converted to new IPC.
     *      [90/03/26  21:53:55  rpd]
     * 
     * Revision 2.3  89/09/08  11:23:58  dbg
     *      Add device_t, and separate in-kernel and out-of-kernel
     *      definitions.
     *      [89/08/01            dbg]
     * 
     * Revision 2.2  89/08/05  16:06:33  rwd
     *      Added code for inband writing
     *      [89/08/04            rwd]
     * 
     *  3-Mar-89  David Golub (dbg) at Carnegie-Mellon University
     *      Created.
     *
     */
    /*
     *      Author: David B. Golub, Carnegie Mellon University
     *      Date:   3/89
     */
    
    #ifndef DEVICE_TYPES_H
    #define DEVICE_TYPES_H
    
    /*
     * Types for device interface.
     */
    #include <mach/std_types.h>
    
    #ifdef  KERNEL
    /*
     * Get kernel-only type definitions.
     */
    #include <device/device_types_kernel.h>
    
    #else   KERNEL
    /*
     * Device handle.
     */
    typedef mach_port_t     device_t;
   
   #endif  KERNEL
   
   /*
    * Device name string
    */
   typedef char    dev_name_t[128];        /* must match device_types.defs */
   
   /*
    * Mode for open/read/write
    */
   typedef unsigned int    dev_mode_t;
   #define D_READ          0x1             /* read */
   #define D_WRITE         0x2             /* write */
   #define D_NODELAY       0x4             /* no delay on open */
   #define D_NOWAIT        0x8             /* do not wait if data not available */
   
   /*
    * IO buffer - out-of-line array of characters.
    */
   typedef char *  io_buf_ptr_t;
   
   /*
    * IO buffer - in-line array of characters.
    */
   #define IO_INBAND_MAX (128)             /* must match device_types.defs */
   typedef char    io_buf_ptr_inband_t[IO_INBAND_MAX];
   
   /*
    * IO buffer vector - for scatter/gather IO.
    */
   typedef struct {
           vm_offset_t     data;
           vm_size_t       count;
   } io_buf_vec_t;
   
   /*
    * Record number for random-access devices
    */
   typedef unsigned int    recnum_t;
   
   /*
    * Flavors of set/get statuses
    */
   typedef unsigned int    dev_flavor_t;
   
   /*
    * Generic array for get/set status
    */
   typedef int             *dev_status_t;  /* Variable-length array of integers */
   #define DEV_STATUS_MAX  (1024)          /* Maximum array size */
   
   typedef int             dev_status_data_t[DEV_STATUS_MAX];
   
   /*
    * Mandatory get/set status operations
    */
   
   /* size a device: op code and indexes for returned values */
   #define DEV_GET_SIZE                    0
   #       define  DEV_GET_SIZE_DEVICE_SIZE        0       /* 0 if unknown */
   #       define  DEV_GET_SIZE_RECORD_SIZE        1       /* 1 if sequential */
   #define DEV_GET_SIZE_COUNT              2
   
   /*
    * Device error codes
    */
   typedef int             io_return_t;
   
   #define D_IO_QUEUED             (-1)    /* IO queued - do not return result */
   #define D_SUCCESS               0
   
   #define D_IO_ERROR              2500    /* hardware IO error */
   #define D_WOULD_BLOCK           2501    /* would block, but D_NOWAIT set */
   #define D_NO_SUCH_DEVICE        2502    /* no such device */
   #define D_ALREADY_OPEN          2503    /* exclusive-use device already open */
   #define D_DEVICE_DOWN           2504    /* device has been shut down */
   #define D_INVALID_OPERATION     2505    /* bad operation for device */
   #define D_INVALID_RECNUM        2506    /* invalid record (block) number */
   #define D_INVALID_SIZE          2507    /* invalid IO size */
   #define D_NO_MEMORY             2508    /* memory allocation failure */
   #define D_READ_ONLY             2509    /* device cannot be written to */
   
   #endif  DEVICE_TYPES_H

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