freebsd-skq/sys/dev/ida/ida_disk.c

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/*-
* Copyright (c) 1999,2000 Jonathan Lemon
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
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* $FreeBSD$
*/
/*
* Disk driver for Compaq SMART RAID adapters.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
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#include <sys/module.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
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#include <sys/cons.h>
#include <machine/bus.h>
#include <sys/rman.h>
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#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/md_var.h>
#include <geom/geom_disk.h>
#include <dev/ida/idareg.h>
#include <dev/ida/idavar.h>
/* prototypes */
static int idad_probe(device_t dev);
static int idad_attach(device_t dev);
static int idad_detach(device_t dev);
static d_strategy_t idad_strategy;
static dumper_t idad_dump;
static devclass_t idad_devclass;
static device_method_t idad_methods[] = {
DEVMETHOD(device_probe, idad_probe),
DEVMETHOD(device_attach, idad_attach),
DEVMETHOD(device_detach, idad_detach),
{ 0, 0 }
};
static driver_t idad_driver = {
"idad",
idad_methods,
sizeof(struct idad_softc)
};
DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0);
/*
* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
static void
idad_strategy(struct bio *bp)
{
struct idad_softc *drv;
int s;
drv = bp->bio_disk->d_drv1;
if (drv == NULL) {
bp->bio_error = EINVAL;
goto bad;
}
/*
* software write protect check
*/
if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
bp->bio_error = EROFS;
goto bad;
}
bp->bio_driver1 = drv;
s = splbio();
ida_submit_buf(drv->controller, bp);
splx(s);
return;
bad:
bp->bio_flags |= BIO_ERROR;
/*
* Correctly set the buf to indicate a completed transfer
*/
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}
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static int
idad_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
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{
Here follows the new kernel dumping infrastructure. Caveats: The new savecore program is not complete in the sense that it emulates enough of the old savecores features to do the job, but implements none of the options yet. I would appreciate if a userland hacker could help me out getting savecore to do what we want it to do from a users point of view, compression, email-notification, space reservation etc etc. (send me email if you are interested). Currently, savecore will scan all devices marked as "swap" or "dump" in /etc/fstab _or_ any devices specified on the command-line. All architectures but i386 lack an implementation of dumpsys(), but looking at the i386 version it should be trivial for anybody familiar with the platform(s) to provide this function. Documentation is quite sparse at this time, more to come. Details: ATA and SCSI drivers should work as the dump formatting code has been removed. The IDA, TWE and AAC have not yet been converted. Dumpon now opens the device and uses ioctl(DIOCGKERNELDUMP) to set the device as dumpdev. To implement the "off" argument, /dev/null is used as the device. Savecore will fail if handed any options since they are not (yet) implemented. All devices marked "dump" or "swap" in /etc/fstab will be scanned and dumps found will be saved to diskfiles named from the MD5 hash of the header record. The header record is dumped in readable format in the .info file. The kernel is not saved. Only complete dumps will be saved. All maintainer rights for this code are disclaimed: feel free to improve and extend. Sponsored by: DARPA, NAI Labs
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struct idad_softc *drv;
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int error = 0;
struct disk *dp;
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dp = arg;
drv = dp->d_drv1;
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if (drv == NULL)
return (ENXIO);
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drv->controller->flags &= ~IDA_INTERRUPTS;
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if (length > 0) {
error = ida_command(drv->controller, CMD_WRITE, virtual,
length, drv->drive, offset / DEV_BSIZE, DMA_DATA_OUT);
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}
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drv->controller->flags |= IDA_INTERRUPTS;
return (error);
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}
void
idad_intr(struct bio *bp)
{
struct idad_softc *drv;
drv = bp->bio_disk->d_drv1;
if (bp->bio_flags & BIO_ERROR)
bp->bio_error = EIO;
else
bp->bio_resid = 0;
biodone(bp);
}
static int
idad_probe(device_t dev)
{
device_set_desc(dev, "Compaq Logical Drive");
return (0);
}
static int
idad_attach(device_t dev)
{
struct ida_drive_info dinfo;
struct idad_softc *drv;
device_t parent;
int error;
drv = (struct idad_softc *)device_get_softc(dev);
parent = device_get_parent(dev);
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drv->dev = dev;
drv->controller = (struct ida_softc *)device_get_softc(parent);
drv->unit = device_get_unit(dev);
drv->drive = drv->controller->num_drives;
drv->controller->num_drives++;
error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
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&dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN);
if (error) {
device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
return (ENXIO);
}
drv->cylinders = dinfo.dp.ncylinders;
drv->heads = dinfo.dp.nheads;
drv->sectors = dinfo.dp.nsectors;
drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize;
drv->secperunit = dinfo.secperunit;
/* XXX
* other initialization
*/
device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
drv->secperunit / ((1024 * 1024) / drv->secsize),
drv->secperunit, drv->secsize);
drv->disk = disk_alloc();
drv->disk->d_strategy = idad_strategy;
drv->disk->d_name = "idad";
drv->disk->d_dump = idad_dump;
drv->disk->d_sectorsize = drv->secsize;
drv->disk->d_mediasize = (off_t)drv->secperunit * drv->secsize;
drv->disk->d_fwsectors = drv->sectors;
drv->disk->d_fwheads = drv->heads;
drv->disk->d_drv1 = drv;
drv->disk->d_maxsize = DFLTPHYS; /* XXX guess? */
drv->disk->d_unit = drv->unit;
drv->disk->d_flags = DISKFLAG_NEEDSGIANT;
disk_create(drv->disk, DISK_VERSION);
return (0);
}
static int
idad_detach(device_t dev)
{
struct idad_softc *drv;
drv = (struct idad_softc *)device_get_softc(dev);
disk_destroy(drv->disk);
return (0);
}