1 /* 2 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * ---------------------------------------------------------------------------- 35 * "THE BEER-WARE LICENSE" (Revision 42): 36 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 37 * can do whatever you want with this stuff. If we meet some day, and you think 38 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 39 * ---------------------------------------------------------------------------- 40 * 41 * $FreeBSD: src/sys/sys/disk.h,v 1.16.2.3 2001/06/20 16:11:01 scottl Exp $ 42 * $DragonFly: src/sys/sys/disk.h,v 1.18 2007/07/30 08:02:40 dillon Exp $ 43 */ 44 45 #ifndef _SYS_DISK_H_ 46 #define _SYS_DISK_H_ 47 48 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 49 #error "This file should not be included by userland programs." 50 #endif 51 52 #ifndef _SYS_DISKSLICE_H_ 53 #include <sys/diskslice.h> 54 #endif 55 #ifndef _SYS_QUEUE_H_ 56 #include <sys/queue.h> 57 #endif 58 #ifndef _SYS_MSGPORT_H_ 59 #include <sys/msgport.h> 60 #endif 61 62 /* 63 * Media information structure - filled in by the media driver. 64 * 65 * NOTE: d_serialno is copied on the call to setdiskinfo and need 66 * not be valid after that. 67 */ 68 struct disk_info { 69 /* 70 * These fields are required. Most drivers will load a disk_info 71 * structure in the device open function with the media parameters 72 * and call disk_setdiskinfo(). 73 * 74 * Note that only one of d_media_size or d_media_blocks should be 75 * filled in. 76 * 77 * d_media_size media size in bytes 78 * d_media_blocks media size in blocks (e.g. total sectors) 79 * d_media_blksize media block size / sector size 80 * d_dsflags disklabel management flags 81 */ 82 u_int64_t d_media_size; 83 u_int64_t d_media_blocks; 84 int d_media_blksize; 85 u_int d_dsflags; 86 87 /* 88 * Optional fields, leave 0 if not known 89 */ 90 u_int d_type; /* DTYPE_xxx */ 91 u_int d_nheads; 92 u_int d_ncylinders; 93 u_int d_secpertrack; 94 u_int d_secpercyl; 95 u_int d_trimflag; 96 char *d_serialno; 97 }; 98 99 /* 100 * d_dsflags, also used for dsopen() - control disklabel processing 101 * 102 * COMPATPARTA - used by scsi devices to allow CDs to boot from cd0a. 103 * cd's don't have disklabels and the default compat label 104 * does not implement an 'a' partition. 105 * 106 * COMPATMBR - used by the vn device to request that one sector be 107 * reserved as if an MBR were present even when one isn't. 108 * 109 * MBRQUIET - silently ignore MBR probe if unable to read sector 0. 110 * used by VN. 111 * 112 * DEVICEMAPPER - used by the device mapper (dm). Adds a '.' between the 113 * device name and the slice/part stuff (i.e. foo.s0). 114 * 115 * RAWPSIZE - use the dev_psize of the underlying raw device if the top 116 * psize fails. 117 */ 118 #define DSO_NOLABELS 0x0001 119 #define DSO_ONESLICE 0x0002 120 #define DSO_COMPATLABEL 0x0004 121 #define DSO_COMPATPARTA 0x0008 122 #define DSO_COMPATMBR 0x0010 123 #define DSO_RAWEXTENSIONS 0x0020 124 #define DSO_MBRQUIET 0x0040 125 #define DSO_DEVICEMAPPER 0x0080 126 #define DSO_RAWPSIZE 0x0100 127 128 /* 129 * Disk management structure - automated disklabel support. 130 */ 131 struct disk { 132 struct dev_ops *d_dev_ops; /* our device switch */ 133 struct dev_ops *d_raw_ops; /* the raw device switch */ 134 u_int d_flags; 135 int d_opencount; /* The current open count */ 136 cdev_t d_rawdev; /* backing raw device */ 137 cdev_t d_cdev; /* special whole-disk part */ 138 struct diskslices *d_slice; 139 struct disk_info d_info; /* info structure for media */ 140 void *d_dsched_priv1;/* I/O scheduler priv. data */ 141 void *d_dsched_priv2;/* I/O scheduler priv. data */ 142 struct dsched_policy *d_sched_policy;/* I/O scheduler policy */ 143 const char *d_disktype; /* Disk type information */ 144 LIST_ENTRY(disk) d_list; 145 }; 146 147 /* 148 * d_flags 149 */ 150 #define DISKFLAG_LOCK 0x1 151 #define DISKFLAG_WANTED 0x2 152 153 #ifdef _KERNEL 154 cdev_t disk_create (int unit, struct disk *disk, struct dev_ops *raw_ops); 155 cdev_t disk_create_clone (int unit, struct disk *disk, struct dev_ops *raw_ops); 156 cdev_t disk_create_named(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); 157 cdev_t disk_create_named_clone(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); 158 cdev_t disk_locate (const char *devname); 159 void disk_destroy (struct disk *disk); 160 void disk_setdiskinfo (struct disk *disk, struct disk_info *info); 161 int disk_setdisktype(struct disk *disk, const char *type); 162 int disk_getopencount(struct disk *disk); 163 void disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info); 164 int disk_dumpcheck (cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize); 165 int disk_dumpconf(cdev_t dev, u_int onoff); 166 struct disk *disk_enumerate (struct disk *disk); 167 void disk_invalidate (struct disk *disk); 168 void disk_unprobe(struct disk *disk); 169 170 void disk_msg_send(uint32_t cmd, void *load, void *load2); 171 void disk_msg_send_sync(uint32_t cmd, void *load, void *load2); 172 void disk_config(void *); 173 174 int bounds_check_with_mediasize(struct bio *bio, int secsize, uint64_t mediasize); 175 176 typedef struct disk_msg { 177 struct lwkt_msg hdr; 178 void *load; 179 void *load2; 180 } *disk_msg_t; 181 182 #define DISK_DISK_PROBE 0x01 183 #define DISK_DISK_DESTROY 0x02 184 #define DISK_SLICE_REPROBE 0x03 185 #define DISK_DISK_REPROBE 0x04 186 #define DISK_UNPROBE 0x05 187 #define DISK_SYNC 0x99 188 189 190 #endif /* _KERNEL */ 191 192 #endif /* _SYS_DISK_H_ */ 193