Add 'alternative memory' disk device driver.
This commit is contained in:
jmcneill
parent
7d53797861
commit
143d119885
|
|
@ -1,4 +1,4 @@
|
|||
# $NetBSD: files,v 1.943 2009/02/22 20:28:05 ad Exp $
|
||||
# $NetBSD: files,v 1.944 2009/03/12 00:15:07 jmcneill Exp $
|
||||
# @(#)files.newconf 7.5 (Berkeley) 5/10/93
|
||||
|
||||
version 20090214
|
||||
|
|
@ -1651,3 +1651,8 @@ include "lib/libx86emu/files.x86emu"
|
|||
# "tprof" profiler.
|
||||
#
|
||||
include "dev/tprof/files.tprof"
|
||||
|
||||
#
|
||||
# alternate memory device
|
||||
#
|
||||
include "dev/altmem/files.altmem"
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
# $NetBSD: majors,v 1.44 2008/12/19 15:24:04 haad Exp $
|
||||
# $NetBSD: majors,v 1.45 2009/03/12 00:15:07 jmcneill Exp $
|
||||
#
|
||||
# Device majors for Machine-Independent drivers.
|
||||
#
|
||||
|
|
@ -31,6 +31,7 @@ device-major putter char 178 putter
|
|||
device-major srt char 179 srt
|
||||
device-major drm char 180 drmbase
|
||||
device-major bio char 181 bio
|
||||
device-major altmem char 182 block 182 altmem
|
||||
device-major twa char 187 twa
|
||||
device-major cpuctl char 188
|
||||
device-major pad char 189 pad
|
||||
|
|
|
|||
|
|
@ -0,0 +1,183 @@
|
|||
/* $NetBSD: altmem.c,v 1.1 2009/03/12 00:15:07 jmcneill Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
__KERNEL_RCSID(0, "$NetBSD: altmem.c,v 1.1 2009/03/12 00:15:07 jmcneill Exp $");
|
||||
#include <sys/param.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/device.h>
|
||||
#include <sys/conf.h>
|
||||
#include <sys/buf.h>
|
||||
#include <sys/disklabel.h>
|
||||
#include <sys/disk.h>
|
||||
|
||||
#include <dev/altmem/altmemvar.h>
|
||||
|
||||
struct altmem_softc {
|
||||
device_t sc_dev;
|
||||
|
||||
struct disk sc_dkdev;
|
||||
|
||||
void *sc_cookie;
|
||||
const struct altmem_memops *sc_memops;
|
||||
|
||||
size_t sc_size;
|
||||
};
|
||||
|
||||
static dev_type_open(altmemopen);
|
||||
static dev_type_close(altmemclose);
|
||||
static dev_type_read(altmemread);
|
||||
static dev_type_write(altmemwrite);
|
||||
static dev_type_ioctl(altmemioctl);
|
||||
static dev_type_strategy(altmemstrategy);
|
||||
static dev_type_size(altmemsize);
|
||||
|
||||
static int altmem_match(device_t, cfdata_t, void *);
|
||||
static void altmem_attach(device_t, device_t, void *);
|
||||
|
||||
const struct bdevsw altmem_bdevsw = {
|
||||
altmemopen, altmemclose, altmemstrategy, altmemioctl, nodump,
|
||||
altmemsize, D_DISK
|
||||
};
|
||||
const struct cdevsw altmem_cdevsw = {
|
||||
altmemopen, altmemclose, altmemread, altmemwrite, altmemioctl,
|
||||
nostop, notty, nopoll, nommap, nokqfilter, D_DISK
|
||||
};
|
||||
static struct dkdriver altmemdkdriver = { altmemstrategy, minphys };
|
||||
extern struct cfdriver altmem_cd;
|
||||
|
||||
CFATTACH_DECL_NEW(altmem, sizeof(struct altmem_softc), altmem_match,
|
||||
altmem_attach, NULL, NULL);
|
||||
|
||||
static int
|
||||
altmem_match(device_t parent, cfdata_t match, void *opaque)
|
||||
{
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void
|
||||
altmem_attach(device_t parent, device_t self, void *opaque)
|
||||
{
|
||||
struct altmem_softc *sc = device_private(self);
|
||||
struct altmem_attach_args *aaa = opaque;
|
||||
char pbuf[9];
|
||||
|
||||
sc->sc_dev = self;
|
||||
sc->sc_cookie = aaa->cookie;
|
||||
sc->sc_memops = aaa->memops;
|
||||
sc->sc_size = sc->sc_memops->getsize(sc->sc_cookie);
|
||||
|
||||
format_bytes(pbuf, sizeof(pbuf), sc->sc_size);
|
||||
|
||||
aprint_naive("\n");
|
||||
aprint_normal(": %s\n", pbuf);
|
||||
|
||||
disk_init(&sc->sc_dkdev, device_xname(self), &altmemdkdriver);
|
||||
disk_attach(&sc->sc_dkdev);
|
||||
}
|
||||
|
||||
static int
|
||||
altmemsize(dev_t dev)
|
||||
{
|
||||
struct altmem_softc *sc = device_lookup_private(&altmem_cd, DISKUNIT(dev));
|
||||
if (sc == NULL)
|
||||
return 0;
|
||||
return sc->sc_size >> DEV_BSHIFT;
|
||||
}
|
||||
|
||||
static int
|
||||
altmemopen(dev_t dev, int flag, int fmt, struct lwp *l)
|
||||
{
|
||||
struct altmem_softc *sc = device_lookup_private(&altmem_cd, DISKUNIT(dev));
|
||||
if (sc == NULL)
|
||||
return ENXIO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
altmemclose(dev_t dev, int flag, int fmt, struct lwp *l)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
altmemread(dev_t dev, struct uio *uio, int flags)
|
||||
{
|
||||
if (device_lookup_private(&altmem_cd, DISKUNIT(dev)) == NULL)
|
||||
return ENXIO;
|
||||
return physio(altmemstrategy, NULL, dev, B_READ, minphys, uio);
|
||||
}
|
||||
|
||||
static int
|
||||
altmemwrite(dev_t dev, struct uio *uio, int flags)
|
||||
{
|
||||
if (device_lookup_private(&altmem_cd, DISKUNIT(dev)) == NULL)
|
||||
return ENXIO;
|
||||
return physio(altmemstrategy, NULL, dev, B_WRITE, minphys, uio);
|
||||
}
|
||||
|
||||
static void
|
||||
altmemstrategy(struct buf *bp)
|
||||
{
|
||||
struct altmem_softc *sc = device_lookup_private(&altmem_cd, DISKUNIT(bp->b_dev));
|
||||
|
||||
if (sc == NULL) {
|
||||
bp->b_error = ENXIO;
|
||||
biodone(bp);
|
||||
return;
|
||||
}
|
||||
if (bp->b_bcount == 0) {
|
||||
biodone(bp);
|
||||
return;
|
||||
}
|
||||
|
||||
sc->sc_memops->strategy(sc->sc_cookie, bp);
|
||||
biodone(bp);
|
||||
}
|
||||
|
||||
static int
|
||||
altmemioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
|
||||
{
|
||||
struct altmem_softc *sc = device_lookup_private(&altmem_cd, DISKUNIT(dev));
|
||||
struct dkwedge_info *dkw;
|
||||
|
||||
switch (cmd) {
|
||||
case DIOCGWEDGEINFO:
|
||||
dkw = (void *)data;
|
||||
strlcpy(dkw->dkw_devname, device_xname(sc->sc_dev),
|
||||
sizeof(dkw->dkw_devname));
|
||||
strlcpy(dkw->dkw_wname, "altmem", sizeof(dkw->dkw_wname));
|
||||
dkw->dkw_parent[0] = '\0';
|
||||
dkw->dkw_offset = 0;
|
||||
dkw->dkw_size = sc->sc_size >> DEV_BSHIFT;
|
||||
strcpy(dkw->dkw_ptype, DKW_PTYPE_UNUSED);
|
||||
break;
|
||||
default:
|
||||
return ENOTTY;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,44 @@
|
|||
/* $NetBSD: altmemvar.h,v 1.1 2009/03/12 00:15:07 jmcneill Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef _HAVE_DEV_ALTMEM_ALTMEMVAR_H
|
||||
#define _HAVE_DEV_ALTMEM_ALTMEMVAR_H
|
||||
|
||||
#include <sys/types.h>
|
||||
#include <sys/buf.h>
|
||||
|
||||
struct altmem_memops {
|
||||
size_t (*getsize)(void *);
|
||||
void (*strategy)(void *, struct buf *);
|
||||
};
|
||||
|
||||
struct altmem_attach_args {
|
||||
void *cookie;
|
||||
const struct altmem_memops *memops;
|
||||
};
|
||||
|
||||
#endif /* !_HAVE_DEV_ALTMEM_ALTMEMVAR_H */
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
# $NetBSD: files.altmem,v 1.1 2009/03/12 00:15:07 jmcneill Exp $
|
||||
|
||||
define altmemdev { }
|
||||
|
||||
device altmem: disk
|
||||
attach altmem at altmemdev
|
||||
file dev/altmem/altmem.c altmem
|
||||
Loading…
Reference in New Issue