0b7ed341e1
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.
165 lines
4.8 KiB
C
165 lines
4.8 KiB
C
/*-
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* Written by: David Jeffery
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* Copyright (c) 2002 Adaptec Inc.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/ips/ips.h>
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#include <dev/ips/ips_disk.h>
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#include <sys/stat.h>
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static int ipsd_probe(device_t dev);
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static int ipsd_attach(device_t dev);
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static int ipsd_detach(device_t dev);
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static disk_open_t ipsd_open;
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static disk_close_t ipsd_close;
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static disk_strategy_t ipsd_strategy;
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static device_method_t ipsd_methods[] = {
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DEVMETHOD(device_probe, ipsd_probe),
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DEVMETHOD(device_attach, ipsd_attach),
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DEVMETHOD(device_detach, ipsd_detach),
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{ 0, 0 }
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};
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static driver_t ipsd_driver = {
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"ipsd",
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ipsd_methods,
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sizeof(ipsdisk_softc_t)
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};
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static devclass_t ipsd_devclass;
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DRIVER_MODULE(ipsd, ips, ipsd_driver, ipsd_devclass, 0, 0);
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/* handle opening of disk device. It must set up all
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information about the geometry and size of the disk */
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static int ipsd_open(struct disk *dp)
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{
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ipsdisk_softc_t *dsc = dp->d_drv1;
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dsc->state |= IPS_DEV_OPEN;
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DEVICE_PRINTF(2, dsc->dev, "I'm open\n");
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return 0;
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}
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static int ipsd_close(struct disk *dp)
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{
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ipsdisk_softc_t *dsc = dp->d_drv1;
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dsc->state &= ~IPS_DEV_OPEN;
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DEVICE_PRINTF(2, dsc->dev, "I'm closed for the day\n");
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return 0;
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}
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/* ipsd_finish is called to clean up and return a completed IO request */
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void ipsd_finish(struct bio *iobuf)
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{
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if (iobuf->bio_flags & BIO_ERROR) {
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ipsdisk_softc_t *dsc;
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dsc = iobuf->bio_disk->d_drv1;
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device_printf(dsc->dev, "iobuf error %d\n", iobuf->bio_error);
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} else
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iobuf->bio_resid = 0;
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biodone(iobuf);
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}
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static void ipsd_strategy(struct bio *iobuf)
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{
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ipsdisk_softc_t *dsc;
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dsc = iobuf->bio_disk->d_drv1;
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DEVICE_PRINTF(8,dsc->dev,"in strategy\n");
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iobuf->bio_driver1 = (void *)(uintptr_t)dsc->sc->drives[dsc->disk_number].drivenum;
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ips_start_io_request(dsc->sc, iobuf);
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}
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static int ipsd_probe(device_t dev)
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{
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DEVICE_PRINTF(2,dev, "in probe\n");
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device_set_desc(dev, "Logical Drive");
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return 0;
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}
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static int ipsd_attach(device_t dev)
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{
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device_t adapter;
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ipsdisk_softc_t *dsc;
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u_int totalsectors;
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DEVICE_PRINTF(2,dev, "in attach\n");
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dsc = (ipsdisk_softc_t *)device_get_softc(dev);
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bzero(dsc, sizeof(ipsdisk_softc_t));
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adapter = device_get_parent(dev);
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dsc->dev = dev;
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dsc->sc = device_get_softc(adapter);
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dsc->unit = device_get_unit(dev);
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dsc->disk_number = (uintptr_t) device_get_ivars(dev);
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dsc->ipsd_disk = disk_alloc();
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dsc->ipsd_disk->d_drv1 = dsc;
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dsc->ipsd_disk->d_name = "ipsd";
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dsc->ipsd_disk->d_maxsize = IPS_MAX_IO_SIZE;
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dsc->ipsd_disk->d_open = ipsd_open;
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dsc->ipsd_disk->d_close = ipsd_close;
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dsc->ipsd_disk->d_strategy = ipsd_strategy;
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totalsectors = dsc->sc->drives[dsc->disk_number].sector_count;
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if ((totalsectors > 0x400000) &&
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((dsc->sc->adapter_info.miscflags & 0x8) == 0)) {
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dsc->ipsd_disk->d_fwheads = IPS_NORM_HEADS;
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dsc->ipsd_disk->d_fwsectors = IPS_NORM_SECTORS;
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} else {
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dsc->ipsd_disk->d_fwheads = IPS_COMP_HEADS;
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dsc->ipsd_disk->d_fwsectors = IPS_COMP_SECTORS;
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}
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dsc->ipsd_disk->d_sectorsize = IPS_BLKSIZE;
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dsc->ipsd_disk->d_mediasize = (off_t)totalsectors * IPS_BLKSIZE;
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dsc->ipsd_disk->d_unit = dsc->unit;
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dsc->ipsd_disk->d_flags = DISKFLAG_NEEDSGIANT;
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disk_create(dsc->ipsd_disk, DISK_VERSION);
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device_printf(dev, "Logical Drive (%dMB)\n",
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dsc->sc->drives[dsc->disk_number].sector_count >> 11);
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return 0;
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}
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static int ipsd_detach(device_t dev)
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{
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ipsdisk_softc_t *dsc;
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DEVICE_PRINTF(2, dev,"in detach\n");
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dsc = (ipsdisk_softc_t *)device_get_softc(dev);
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if(dsc->state & IPS_DEV_OPEN)
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return (EBUSY);
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disk_destroy(dsc->ipsd_disk);
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return 0;
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}
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