1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 * 21 * $FreeBSD$ 22 */ 23 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #ifndef _OPENSOLARIS_SYS_DKIO_H_ 29 #define _OPENSOLARIS_SYS_DKIO_H_ 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /* 36 * Disk io control commands 37 * Warning: some other ioctls with the DIOC prefix exist elsewhere. 38 * The Generic DKIOC numbers are from 0 - 50. 39 * The Floppy Driver uses 51 - 100. 40 * The Hard Disk (except SCSI) 101 - 106. (these are obsolete) 41 * The CDROM Driver 151 - 200. 42 * The USCSI ioctl 201 - 250. 43 */ 44 #define DKIOC (0x04 << 8) 45 46 /* 47 * The following ioctls are generic in nature and need to be 48 * suported as appropriate by all disk drivers 49 */ 50 #define DKIOCGGEOM (DKIOC|1) /* Get geometry */ 51 #define DKIOCINFO (DKIOC|3) /* Get info */ 52 #define DKIOCEJECT (DKIOC|6) /* Generic 'eject' */ 53 #define DKIOCGVTOC (DKIOC|11) /* Get VTOC */ 54 #define DKIOCSVTOC (DKIOC|12) /* Set VTOC & Write to Disk */ 55 56 /* 57 * Disk Cache Controls. These ioctls should be supported by 58 * all disk drivers. 59 * 60 * DKIOCFLUSHWRITECACHE when used from user-mode ignores the ioctl 61 * argument, but it should be passed as NULL to allow for future 62 * reinterpretation. From user-mode, this ioctl request is synchronous. 63 * 64 * When invoked from within the kernel, the arg can be NULL to indicate 65 * a synchronous request or can be the address of a struct dk_callback 66 * to request an asynchronous callback when the flush request is complete. 67 * In this case, the flag to the ioctl must include FKIOCTL and the 68 * dkc_callback field of the pointed to struct must be non-null or the 69 * request is made synchronously. 70 * 71 * In the callback case: if the ioctl returns 0, a callback WILL be performed. 72 * If the ioctl returns non-zero, a callback will NOT be performed. 73 * NOTE: In some cases, the callback may be done BEFORE the ioctl call 74 * returns. The caller's locking strategy should be prepared for this case. 75 */ 76 #define DKIOCFLUSHWRITECACHE (DKIOC|34) /* flush cache to phys medium */ 77 78 struct dk_callback { 79 void (*dkc_callback)(void *dkc_cookie, int error); 80 void *dkc_cookie; 81 }; 82 83 #ifdef __cplusplus 84 } 85 #endif 86 87 #endif /* _OPENSOLARIS_SYS_DKIO_H_ */ 88