158 lines
5.0 KiB
C
158 lines
5.0 KiB
C
/*-
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* Copyright (c) 1998 - 2008 Søren Schmidt <sos@FreeBSD.org>
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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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* without modification, immediately at the beginning of the file.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2009-2013 Microsoft Corp.
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* Copyright (c) 2012 NetApp Inc.
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* Copyright (c) 2012 Citrix 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 unmodified, this list of conditions, and the following
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* 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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 <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/module.h>
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#include <sys/ata.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/malloc.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <vm/uma.h>
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#include <machine/stdarg.h>
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#include <machine/resource.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/ata/ata-all.h>
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#include <dev/ata/ata-pci.h>
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#include <ata_if.h>
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/* prototypes */
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static int hv_ata_pci_probe(device_t dev);
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static int hv_ata_pci_attach(device_t dev);
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static int hv_ata_pci_detach(device_t dev);
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/*
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* generic PCI ATA device probe
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*/
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static int
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hv_ata_pci_probe(device_t dev)
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{
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device_t parent = device_get_parent(dev);
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int ata_disk_enable;
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ata_disk_enable = 0;
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/*
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* Don't probe if not running in a Hyper-V environment
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*/
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if (vm_guest != VM_GUEST_HV)
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return (ENXIO);
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if (device_get_unit(parent) != 0 || device_get_ivars(dev) != 0)
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return (ENXIO);
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/*
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* On Hyper-V the default is to use the enlightened driver for
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* IDE disks. However, if the user wishes to use the native
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* ATA driver, the environment variable
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* hw_ata.disk_enable must be explicitly set to 1.
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*/
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if (getenv_int("hw.ata.disk_enable", &ata_disk_enable)) {
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if (bootverbose)
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device_printf(dev,
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"hw.ata.disk_enable flag is disabling Hyper-V"
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" ATA driver support\n");
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return (ENXIO);
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}
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device_set_desc(dev, "Hyper-V ATA storage disengage driver");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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hv_ata_pci_attach(device_t dev)
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{
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return (0);
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}
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static int
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hv_ata_pci_detach(device_t dev)
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{
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return (0);
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}
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static device_method_t hv_ata_pci_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, hv_ata_pci_probe),
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DEVMETHOD(device_attach, hv_ata_pci_attach),
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DEVMETHOD(device_detach, hv_ata_pci_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD_END
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};
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devclass_t hv_ata_pci_devclass;
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static driver_t hv_ata_pci_disengage_driver = {
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"ata",
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hv_ata_pci_methods,
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0,
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};
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DRIVER_MODULE(atapci_dis, atapci, hv_ata_pci_disengage_driver,
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hv_ata_pci_devclass, NULL, NULL);
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MODULE_VERSION(atapci_dis, 1);
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MODULE_DEPEND(atapci_dis, ata, 1, 1, 1);
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