49c92e5706
Previously the "struct disk" were owned by the device driver and this gave us problems when the device disappared and the users of that device were not immediately disappearing. Now the struct disk is allocate with a new call, disk_alloc() and owned by geom_disk and just abandonned by the device driver when disk_create() is called. Unfortunately, this results in a ton of "s/\./->/" changes to device drivers. Since I'm doing the sweep anyway, a couple of other API improvements have been carried out at the same time: The Giant awareness flag has been flipped from DISKFLAG_NOGIANT to DISKFLAG_NEEDSGIANT A version number have been added to disk_create() so that we can detect, report and ignore binary drivers with old ABI in the future. Manual page update to follow shortly.
232 lines
5.6 KiB
C
232 lines
5.6 KiB
C
/*-
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* Copyright (c) 1999,2000 Jonathan Lemon
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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*
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* $FreeBSD$
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*/
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/*
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* Disk driver for Compaq SMART RAID adapters.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/cons.h>
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#include <machine/bus_memio.h>
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#include <machine/bus_pio.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/md_var.h>
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#include <geom/geom_disk.h>
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#include <dev/ida/idareg.h>
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#include <dev/ida/idavar.h>
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/* prototypes */
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static int idad_probe(device_t dev);
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static int idad_attach(device_t dev);
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static int idad_detach(device_t dev);
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static d_strategy_t idad_strategy;
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static dumper_t idad_dump;
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static devclass_t idad_devclass;
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static device_method_t idad_methods[] = {
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DEVMETHOD(device_probe, idad_probe),
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DEVMETHOD(device_attach, idad_attach),
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DEVMETHOD(device_detach, idad_detach),
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{ 0, 0 }
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};
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static driver_t idad_driver = {
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"idad",
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idad_methods,
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sizeof(struct idad_softc)
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};
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DRIVER_MODULE(idad, ida, idad_driver, idad_devclass, 0, 0);
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/*
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* Read/write routine for a buffer. Finds the proper unit, range checks
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* arguments, and schedules the transfer. Does not wait for the transfer
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* to complete. Multi-page transfers are supported. All I/O requests must
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* be a multiple of a sector in length.
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*/
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static void
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idad_strategy(struct bio *bp)
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{
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struct idad_softc *drv;
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int s;
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drv = bp->bio_disk->d_drv1;
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if (drv == NULL) {
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bp->bio_error = EINVAL;
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goto bad;
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}
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/*
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* software write protect check
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*/
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if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
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bp->bio_error = EROFS;
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goto bad;
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}
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bp->bio_driver1 = drv;
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s = splbio();
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ida_submit_buf(drv->controller, bp);
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splx(s);
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return;
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bad:
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bp->bio_flags |= BIO_ERROR;
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/*
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* Correctly set the buf to indicate a completed transfer
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*/
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bp->bio_resid = bp->bio_bcount;
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biodone(bp);
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return;
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}
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static int
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idad_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
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{
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struct idad_softc *drv;
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int error = 0;
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struct disk *dp;
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dp = arg;
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drv = dp->d_drv1;
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if (drv == NULL)
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return (ENXIO);
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drv->controller->flags &= ~IDA_INTERRUPTS;
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if (length > 0) {
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error = ida_command(drv->controller, CMD_WRITE, virtual,
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length, drv->drive, offset / DEV_BSIZE, DMA_DATA_OUT);
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}
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drv->controller->flags |= IDA_INTERRUPTS;
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return (error);
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}
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void
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idad_intr(struct bio *bp)
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{
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struct idad_softc *drv;
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drv = bp->bio_disk->d_drv1;
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if (bp->bio_flags & BIO_ERROR)
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bp->bio_error = EIO;
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else
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bp->bio_resid = 0;
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biodone(bp);
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}
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static int
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idad_probe(device_t dev)
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{
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device_set_desc(dev, "Compaq Logical Drive");
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return (0);
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}
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static int
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idad_attach(device_t dev)
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{
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struct ida_drive_info dinfo;
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struct idad_softc *drv;
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device_t parent;
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int error;
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drv = (struct idad_softc *)device_get_softc(dev);
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parent = device_get_parent(dev);
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drv->dev = dev;
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drv->controller = (struct ida_softc *)device_get_softc(parent);
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drv->unit = device_get_unit(dev);
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drv->drive = drv->controller->num_drives;
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drv->controller->num_drives++;
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error = ida_command(drv->controller, CMD_GET_LOG_DRV_INFO,
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&dinfo, sizeof(dinfo), drv->drive, 0, DMA_DATA_IN);
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if (error) {
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device_printf(dev, "CMD_GET_LOG_DRV_INFO failed\n");
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return (ENXIO);
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}
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drv->cylinders = dinfo.dp.ncylinders;
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drv->heads = dinfo.dp.nheads;
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drv->sectors = dinfo.dp.nsectors;
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drv->secsize = dinfo.secsize == 0 ? 512 : dinfo.secsize;
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drv->secperunit = dinfo.secperunit;
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/* XXX
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* other initialization
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*/
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device_printf(dev, "%uMB (%u sectors), blocksize=%d\n",
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drv->secperunit / ((1024 * 1024) / drv->secsize),
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drv->secperunit, drv->secsize);
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drv->disk = disk_alloc();
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drv->disk->d_strategy = idad_strategy;
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drv->disk->d_name = "idad";
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drv->disk->d_dump = idad_dump;
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drv->disk->d_sectorsize = drv->secsize;
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drv->disk->d_mediasize = (off_t)drv->secperunit * drv->secsize;
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drv->disk->d_fwsectors = drv->sectors;
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drv->disk->d_fwheads = drv->heads;
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drv->disk->d_drv1 = drv;
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drv->disk->d_maxsize = DFLTPHYS; /* XXX guess? */
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drv->disk->d_unit = drv->unit;
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drv->disk->d_flags = DISKFLAG_NEEDSGIANT;
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disk_create(drv->disk, DISK_VERSION);
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return (0);
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}
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static int
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idad_detach(device_t dev)
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{
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struct idad_softc *drv;
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drv = (struct idad_softc *)device_get_softc(dev);
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disk_destroy(drv->disk);
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return (0);
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}
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