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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD$
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _OPENSOLARIS_SYS_DKIO_H_
#define _OPENSOLARIS_SYS_DKIO_H_
#ifdef __cplusplus
extern "C" {
#endif
/*
* Disk io control commands
* Warning: some other ioctls with the DIOC prefix exist elsewhere.
* The Generic DKIOC numbers are from 0 - 50.
* The Floppy Driver uses 51 - 100.
* The Hard Disk (except SCSI) 101 - 106. (these are obsolete)
* The CDROM Driver 151 - 200.
* The USCSI ioctl 201 - 250.
*/
#define DKIOC (0x04 << 8)
/*
* The following ioctls are generic in nature and need to be
* suported as appropriate by all disk drivers
*/
#define DKIOCGGEOM (DKIOC|1) /* Get geometry */
#define DKIOCINFO (DKIOC|3) /* Get info */
#define DKIOCEJECT (DKIOC|6) /* Generic 'eject' */
#define DKIOCGVTOC (DKIOC|11) /* Get VTOC */
#define DKIOCSVTOC (DKIOC|12) /* Set VTOC & Write to Disk */
/*
* Disk Cache Controls. These ioctls should be supported by
* all disk drivers.
*
* DKIOCFLUSHWRITECACHE when used from user-mode ignores the ioctl
* argument, but it should be passed as NULL to allow for future
* reinterpretation. From user-mode, this ioctl request is synchronous.
*
* When invoked from within the kernel, the arg can be NULL to indicate
* a synchronous request or can be the address of a struct dk_callback
* to request an asynchronous callback when the flush request is complete.
* In this case, the flag to the ioctl must include FKIOCTL and the
* dkc_callback field of the pointed to struct must be non-null or the
* request is made synchronously.
*
* In the callback case: if the ioctl returns 0, a callback WILL be performed.
* If the ioctl returns non-zero, a callback will NOT be performed.
* NOTE: In some cases, the callback may be done BEFORE the ioctl call
* returns. The caller's locking strategy should be prepared for this case.
*/
#define DKIOCFLUSHWRITECACHE (DKIOC|34) /* flush cache to phys medium */
struct dk_callback {
void (*dkc_callback)(void *dkc_cookie, int error);
void *dkc_cookie;
};
#ifdef __cplusplus
}
#endif
#endif /* _OPENSOLARIS_SYS_DKIO_H_ */
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