xnu-1228.15.4.tar.gz

[apple/xnu.git] / bsd / sys / disk.h

/*
 * Copyright (c) 1998-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#ifndef	_SYS_DISK_H_
#define	_SYS_DISK_H_

#include <stdint.h>
#include <sys/ioctl.h>

/*
 * Definitions
 *
 * ioctl                                 description
 * ------------------------------------- ---------------------------------------
 * DKIOCEJECT                            eject media
 * DKIOCSYNCHRONIZECACHE                 flush media
 *
 * DKIOCFORMAT                           format media
 * DKIOCGETFORMATCAPACITIES              get media's formattable capacities
 *
 * DKIOCGETBLOCKSIZE                     get media's block size
 * DKIOCGETBLOCKCOUNT                    get media's block count
 * DKIOCGETFIRMWAREPATH                  get media's firmware path
 *
 * DKIOCISFORMATTED                      is media formatted?
 * DKIOCISWRITABLE                       is media writable?
 *
 * DKIOCREQUESTIDLE                      idle media
 * DKIOCDISCARD                          delete unused data
 *
 * DKIOCGETMAXBLOCKCOUNTREAD             get maximum block count for reads
 * DKIOCGETMAXBLOCKCOUNTWRITE            get maximum block count for writes
 * DKIOCGETMAXBYTECOUNTREAD              get maximum byte count for reads
 * DKIOCGETMAXBYTECOUNTWRITE             get maximum byte count for writes
 *
 * DKIOCGETMAXSEGMENTCOUNTREAD           get maximum segment count for reads
 * DKIOCGETMAXSEGMENTCOUNTWRITE          get maximum segment count for writes
 * DKIOCGETMAXSEGMENTBYTECOUNTREAD       get maximum segment byte count for reads
 * DKIOCGETMAXSEGMENTBYTECOUNTWRITE      get maximum segment byte count for writes
 *
 * DKIOCGETMINSEGMENTALIGNMENTBYTECOUNT  get minimum segment alignment in bytes
 * DKIOCGETMAXSEGMENTADDRESSABLEBITCOUNT get maximum segment width in bits
 *
 * DKIOCGETPHYSICALBLOCKSIZE             get device's block size
 */

typedef struct
{
    uint64_t               offset;
    uint64_t               length;

    uint8_t                reserved0128[16];       /* reserved, clear to zero */
} dk_discard_t;

typedef struct
{
    char                   path[128];
} dk_firmware_path_t;

typedef struct
{
    uint64_t               blockCount;
    uint32_t               blockSize;

    uint8_t                reserved0096[4];        /* reserved, clear to zero */
} dk_format_capacity_t;

typedef struct
{
    dk_format_capacity_t * capacities;
    uint32_t               capacitiesCount;        /* use zero to probe count */

#ifdef __LP64__
    uint8_t                reserved0096[4];        /* reserved, clear to zero */
#else /* !__LP64__ */
    uint8_t                reserved0064[8];        /* reserved, clear to zero */
#endif /* !__LP64__ */
} dk_format_capacities_t;

#define DKIOCEJECT                            _IO('d', 21)
#define DKIOCSYNCHRONIZECACHE                 _IO('d', 22)

#define DKIOCFORMAT                           _IOW('d', 26, dk_format_capacity_t)
#define DKIOCGETFORMATCAPACITIES              _IOWR('d', 26, dk_format_capacities_t)

#define DKIOCGETBLOCKSIZE                     _IOR('d', 24, uint32_t)
#define DKIOCGETBLOCKCOUNT                    _IOR('d', 25, uint64_t)
#define DKIOCGETFIRMWAREPATH                  _IOR('d', 28, dk_firmware_path_t)

#define DKIOCISFORMATTED                      _IOR('d', 23, uint32_t)
#define DKIOCISWRITABLE                       _IOR('d', 29, uint32_t)

#define DKIOCREQUESTIDLE                      _IO('d', 30)
#define DKIOCDISCARD                          _IOW('d', 31, dk_discard_t)

#define DKIOCGETMAXBLOCKCOUNTREAD             _IOR('d', 64, uint64_t)
#define DKIOCGETMAXBLOCKCOUNTWRITE            _IOR('d', 65, uint64_t)
#define DKIOCGETMAXBYTECOUNTREAD              _IOR('d', 70, uint64_t)
#define DKIOCGETMAXBYTECOUNTWRITE             _IOR('d', 71, uint64_t)

#define DKIOCGETMAXSEGMENTCOUNTREAD           _IOR('d', 66, uint64_t)
#define DKIOCGETMAXSEGMENTCOUNTWRITE          _IOR('d', 67, uint64_t)
#define DKIOCGETMAXSEGMENTBYTECOUNTREAD       _IOR('d', 68, uint64_t)
#define DKIOCGETMAXSEGMENTBYTECOUNTWRITE      _IOR('d', 69, uint64_t)

#define DKIOCGETMINSEGMENTALIGNMENTBYTECOUNT  _IOR('d', 74, uint64_t)
#define DKIOCGETMAXSEGMENTADDRESSABLEBITCOUNT _IOR('d', 75, uint64_t)

#define DKIOCGETPHYSICALBLOCKSIZE             _IOR('d', 77, uint32_t)

#ifdef KERNEL
#define DK_FEATURE_DISCARD                    0x00000010
#define DK_FEATURE_FORCE_UNIT_ACCESS          0x00000001
#define DKIOCGETBLOCKCOUNT32                  _IOR('d', 25, uint32_t)
#define DKIOCSETBLOCKSIZE                     _IOW('d', 24, uint32_t)
#define DKIOCGETBSDUNIT                       _IOR('d', 27, uint32_t)
#define DKIOCISVIRTUAL                        _IOR('d', 72, uint32_t)
#define DKIOCGETBASE                          _IOR('d', 73, uint64_t)
#define DKIOCGETFEATURES                      _IOR('d', 76, uint32_t)
#endif /* KERNEL */

#endif	/* _SYS_DISK_H_ */