FreeBSD/Linux Kernel Cross Reference
sys/dev/virtio/mmio/virtio_mmio_acpi.c

     /*-
      * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
      * Copyright (c) 2014 The FreeBSD Foundation
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
      * ("CTSRD"), as part of the DARPA CRASH research programme.
      *
     * Portions of this software were developed by Andrew Turner
     * under sponsorship from the FreeBSD Foundation.
     *
     * 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.
     */
    
    /*
     * VirtIO MMIO interface.
     * This driver is heavily based on VirtIO PCI interface driver.
     */
    
    #include "opt_acpi.h"
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    #include <dev/acpica/acpivar.h>
    
    #include <dev/virtio/mmio/virtio_mmio.h>
    
    static int      vtmmio_acpi_probe(device_t);
    
    static device_method_t vtmmio_acpi_methods[] = {
            /* Device interface. */
            DEVMETHOD(device_probe,         vtmmio_acpi_probe),
    
            DEVMETHOD_END
    };
    
    DEFINE_CLASS_1(virtio_mmio, vtmmio_acpi_driver, vtmmio_acpi_methods,
        sizeof(struct vtmmio_softc), vtmmio_driver);
    
    DRIVER_MODULE(virtio_mmio, acpi, vtmmio_acpi_driver, 0,0);
    MODULE_DEPEND(virtio_mmio, acpi, 1, 1, 1);
    
    static int
    vtmmio_acpi_probe(device_t dev)
    {
            ACPI_HANDLE h;
    
            if ((h = acpi_get_handle(dev)) == NULL)
                    return (ENXIO);
    
            if (!acpi_MatchHid(h, "LNRO0005"))
                    return (ENXIO);
    
            return (vtmmio_probe(dev));
    }

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