| 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 | #define DSO_NOLABELS 0x0001 |
| 116 | #define DSO_ONESLICE 0x0002 |
| 117 | #define DSO_COMPATLABEL 0x0004 |
| 118 | #define DSO_COMPATPARTA 0x0008 |
| 119 | #define DSO_COMPATMBR 0x0010 |
| 120 | #define DSO_RAWEXTENSIONS 0x0020 |
| 121 | #define DSO_MBRQUIET 0x0040 |
| 122 | #define DSO_DEVICEMAPPER 0x0080 |
| 123 | |
| 124 | /* |
| 125 | * Disk management structure - automated disklabel support. |
| 126 | */ |
| 127 | struct disk { |
| 128 | struct dev_ops *d_dev_ops; /* our device switch */ |
| 129 | struct dev_ops *d_raw_ops; /* the raw device switch */ |
| 130 | u_int d_flags; |
| 131 | int d_opencount; /* The current open count */ |
| 132 | cdev_t d_rawdev; /* backing raw device */ |
| 133 | cdev_t d_cdev; /* special whole-disk part */ |
| 134 | struct diskslices *d_slice; |
| 135 | struct disk_info d_info; /* info structure for media */ |
| 136 | void *d_dsched_priv1;/* I/O scheduler priv. data */ |
| 137 | void *d_dsched_priv2;/* I/O scheduler priv. data */ |
| 138 | struct dsched_policy *d_sched_policy;/* I/O scheduler policy */ |
| 139 | const char *d_disktype; /* Disk type information */ |
| 140 | LIST_ENTRY(disk) d_list; |
| 141 | }; |
| 142 | |
| 143 | /* |
| 144 | * d_flags |
| 145 | */ |
| 146 | #define DISKFLAG_LOCK 0x1 |
| 147 | #define DISKFLAG_WANTED 0x2 |
| 148 | |
| 149 | #ifdef _KERNEL |
| 150 | cdev_t disk_create (int unit, struct disk *disk, struct dev_ops *raw_ops); |
| 151 | cdev_t disk_create_clone (int unit, struct disk *disk, struct dev_ops *raw_ops); |
| 152 | cdev_t disk_create_named(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); |
| 153 | cdev_t disk_create_named_clone(const char *name, int unit, struct disk *dp, struct dev_ops *raw_ops); |
| 154 | cdev_t disk_locate (const char *devname); |
| 155 | void disk_destroy (struct disk *disk); |
| 156 | void disk_setdiskinfo (struct disk *disk, struct disk_info *info); |
| 157 | int disk_setdisktype(struct disk *disk, const char *type); |
| 158 | int disk_getopencount(struct disk *disk); |
| 159 | void disk_setdiskinfo_sync(struct disk *disk, struct disk_info *info); |
| 160 | int disk_dumpcheck (cdev_t dev, u_int64_t *count, u_int64_t *blkno, u_int *secsize); |
| 161 | int disk_dumpconf(cdev_t dev, u_int onoff); |
| 162 | struct disk *disk_enumerate (struct disk *disk); |
| 163 | void disk_invalidate (struct disk *disk); |
| 164 | void disk_unprobe(struct disk *disk); |
| 165 | |
| 166 | void disk_msg_send(uint32_t cmd, void *load, void *load2); |
| 167 | void disk_msg_send_sync(uint32_t cmd, void *load, void *load2); |
| 168 | void disk_config(void *); |
| 169 | |
| 170 | int bounds_check_with_mediasize(struct bio *bio, int secsize, uint64_t mediasize); |
| 171 | |
| 172 | typedef struct disk_msg { |
| 173 | struct lwkt_msg hdr; |
| 174 | void *load; |
| 175 | void *load2; |
| 176 | } *disk_msg_t; |
| 177 | |
| 178 | #define DISK_DISK_PROBE 0x01 |
| 179 | #define DISK_DISK_DESTROY 0x02 |
| 180 | #define DISK_SLICE_REPROBE 0x03 |
| 181 | #define DISK_DISK_REPROBE 0x04 |
| 182 | #define DISK_UNPROBE 0x05 |
| 183 | #define DISK_SYNC 0x99 |
| 184 | |
| 185 | |
| 186 | #endif /* _KERNEL */ |
| 187 | |
| 188 | #endif /* _SYS_DISK_H_ */ |