vmbus_res.c

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    1 /*-
    2  * Copyright (c) 2017 Microsoft Corp.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice unmodified, this list of conditions, and the following
   10  *    disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD$");
   29 
   30 #include <sys/param.h>
   31 #include <sys/kernel.h>
   32 #include <sys/bus.h>
   33 #include <sys/module.h>
   34 
   35 #include <contrib/dev/acpica/include/acpi.h>
   36 #include <dev/acpica/acpivar.h>
   37 
   38 #include <dev/hyperv/include/hyperv.h>
   39 
   40 #include "acpi_if.h"
   41 #include "bus_if.h"
   42 
   43 static int              vmbus_res_probe(device_t);
   44 static int              vmbus_res_attach(device_t);
   45 static int              vmbus_res_detach(device_t);
   46 
   47 static device_method_t vmbus_res_methods[] = {
   48         /* Device interface */
   49         DEVMETHOD(device_probe,                 vmbus_res_probe),
   50         DEVMETHOD(device_attach,                vmbus_res_attach),
   51         DEVMETHOD(device_detach,                vmbus_res_detach),
   52         DEVMETHOD(device_shutdown,              bus_generic_shutdown),
   53         DEVMETHOD(device_suspend,               bus_generic_suspend),
   54         DEVMETHOD(device_resume,                bus_generic_resume),
   55 
   56         DEVMETHOD_END
   57 };
   58 
   59 static driver_t vmbus_res_driver = {
   60         "vmbus_res",
   61         vmbus_res_methods,
   62         1
   63 };
   64 
   65 DRIVER_MODULE(vmbus_res, acpi, vmbus_res_driver, NULL, NULL);
   66 MODULE_DEPEND(vmbus_res, acpi, 1, 1, 1);
   67 MODULE_VERSION(vmbus_res, 1);
   68 
   69 static int
   70 vmbus_res_probe(device_t dev)
   71 {
   72         char *id[] = { "VMBUS", NULL };
   73         int rv;
   74         
   75         if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV ||
   76             (hyperv_features & CPUID_HV_MSR_SYNIC) == 0)
   77                 return (ENXIO);
   78         rv = ACPI_ID_PROBE(device_get_parent(dev), dev, id, NULL);
   79         if (rv <= 0)
   80                 device_set_desc(dev, "Hyper-V Vmbus Resource");
   81         return (rv);
   82 }
   83 
   84 static int
   85 vmbus_res_attach(device_t dev __unused)
   86 {
   87 
   88         return (0);
   89 }
   90 
   91 static int
   92 vmbus_res_detach(device_t dev __unused)
   93 {
   94 
   95         return (0);
   96 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/hyperv/vmbus/vmbus_res.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/hyperv/vmbus/vmbus_res.c