Modify SD driver for direct i/o (no rdisk).
This commit is contained in:
Serge Vakulenko
@@ -1,108 +1,56 @@
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* Ioctl definitions for skeleton driver.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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* Copyright (C) 2015 Serge Vakulenko
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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* Permission to use, copy, modify, and distribute this software
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* and its documentation for any purpose and without fee is hereby
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* granted, provided that the above copyright notice appear in all
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* copies and that both that the copyright notice and this
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* permission notice and warranty disclaimer appear in supporting
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* documentation, and that the name of the author not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* The author disclaim all warranties with regard to this
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* software, including all implied warranties of merchantability
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* and fitness. In no event shall the author be liable for any
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* special, indirect or consequential damages or any damages
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* whatsoever resulting from loss of use, data or profits, whether
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* in an action of contract, negligence or other tortious action,
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* arising out of or in connection with the use or performance of
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* this software.
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*/
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#ifndef _SYS_DISK_H_
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#define _SYS_DISK_H_
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#include <sys/disklabel.h>
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/*
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* Disk device structures.
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*
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* Note that this is only a preliminary outline. The final disk structures
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* may be somewhat different.
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*
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* Note: the 2.11BSD version is very different. The 4.4 version served
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* as the inspiration. I needed something similar but for slightly
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* different purposes.
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* IBM PC compatible partition table.
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*/
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#define MAXPARTITIONS 4
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/*
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* Disk device structures. Rather than replicate driver specific variations
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* of the following in each driver it was made common here.
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*
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* Some of the flags are specific to various drivers. For example ALIVE and
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* ONLINE apply to MSCP devices more than to SMD devices while the SEEK flag
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* applies to the SMD (xp) driver but not to the MSCP driver. The rest
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* of the flags as well as the open partition bitmaps are usable by any disk
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* driver. One 'dkdevice' structure is needed for each disk drive supported
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* by a driver.
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*
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* The entire disklabel is not resident in the kernel address space. Only
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* the partition table is directly accessible by the kernel. The MSCP driver
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* does not care (or know) about the geometry of the disk. Not holding
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* the entire label in the kernel saved quite a bit of D space. Other drivers
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* which need geometry information from the label will have to map in the
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* label and copy out the geometry data they require. This is unlikely to
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* cause much overhead since labels are read and written infrequently - when
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* mounting a drive, assigning a label, running newfs, etc.
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*/
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struct dkdevice {
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int dk_bopenmask; /* block devices open */
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int dk_copenmask; /* character devices open */
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int dk_openmask; /* composite (bopen|copen) */
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int dk_flags; /* label state - see below */
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size_t dk_label; /* sector containing label */
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struct partition dk_parts[MAXPARTITIONS]; /* inkernel portion */
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struct diskpart { /* the partition table */
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u_char dp_status; /* active (bootable) flag */
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#define DP_ACTIVE 0x80
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u_char dp_start_chs[3]; /* ignored */
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u_char dp_type; /* type of partition */
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u_char dp_end_chs[3]; /* ignored */
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u_int dp_offset; /* starting sector */
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u_int dp_size; /* number of sectors in partition */
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};
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#define DKF_OPENING 0x0001 /* drive is being opened */
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#define DKF_CLOSING 0x0002 /* drive is being closed */
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#define DKF_WANTED 0x0004 /* drive is being waited for */
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#define DKF_ALIVE 0x0008 /* drive is alive */
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#define DKF_ONLINE 0x0010 /* drive is online */
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#define DKF_WLABEL 0x0020 /* label area is being written */
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#define DKF_SEEK 0x0040 /* drive is seeking */
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#define DKF_SWAIT 0x0080 /* waiting for seek to complete */
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/*
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* Partition types.
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*/
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#define PTYPE_UNUSED 0 /* unused */
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#define PTYPE_BSDFFS 0xb7 /* 4.2BSD fast file system */
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#define PTYPE_SWAP 0xb8 /* swap */
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/* encoding of disk minor numbers, should be elsewhere... but better
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* here than in ufs_disksubr.c
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*
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* Note: the controller number in bits 6 and 7 of the minor device are NOT
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* removed. It is the responsibility of the driver to extract or mask
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* these bits.
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*/
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#define dkunit(dev) (minor(dev) >> 3)
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#define dkpart(dev) (minor(dev) & 07)
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#define dkminor(unit, part) (((unit) << 3) | (part))
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/*
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* Disk-specific ioctls.
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*/
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#define DIOCGETMEDIASIZE _IOR('d', 1, int) /* get size in kbytes */
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#define DIOCREINIT _IO ('d', 2) /* re-initialize device */
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#define DIOCGETPART _IOR('d', 3, struct diskpart) /* get partition */
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#endif /* _SYS_DISK_H_ */
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