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/param.h>
28 #include <sys/kernel.h>
29 #include <sys/bus.h>
30 #include <sys/module.h>
31
32 #include <contrib/dev/acpica/include/acpi.h>
33 #include <dev/acpica/acpivar.h>
34
35 #include <dev/hyperv/include/hyperv.h>
36
37 #include "acpi_if.h"
38 #include "bus_if.h"
39
40 static int vmbus_res_probe(device_t);
41 static int vmbus_res_attach(device_t);
42 static int vmbus_res_detach(device_t);
43
44 static device_method_t vmbus_res_methods[] = {
45 /* Device interface */
46 DEVMETHOD(device_probe, vmbus_res_probe),
47 DEVMETHOD(device_attach, vmbus_res_attach),
48 DEVMETHOD(device_detach, vmbus_res_detach),
49 DEVMETHOD(device_shutdown, bus_generic_shutdown),
50 DEVMETHOD(device_suspend, bus_generic_suspend),
51 DEVMETHOD(device_resume, bus_generic_resume),
52
53 DEVMETHOD_END
54 };
55
56 static driver_t vmbus_res_driver = {
57 "vmbus_res",
58 vmbus_res_methods,
59 1
60 };
61
62 DRIVER_MODULE(vmbus_res, acpi, vmbus_res_driver, NULL, NULL);
63 MODULE_DEPEND(vmbus_res, acpi, 1, 1, 1);
64 MODULE_VERSION(vmbus_res, 1);
65
66 static int
vmbus_res_probe(device_t dev)67 vmbus_res_probe(device_t dev)
68 {
69 char *id[] = { "VMBUS", NULL };
70 int rv;
71
72 if (device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV ||
73 (hyperv_features & CPUID_HV_MSR_SYNIC) == 0)
74 return (ENXIO);
75 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, id, NULL);
76 if (rv <= 0)
77 device_set_desc(dev, "Hyper-V Vmbus Resource");
78 return (rv);
79 }
80
81 static int
vmbus_res_attach(device_t dev __unused)82 vmbus_res_attach(device_t dev __unused)
83 {
84
85 return (0);
86 }
87
88 static int
vmbus_res_detach(device_t dev __unused)89 vmbus_res_detach(device_t dev __unused)
90 {
91
92 return (0);
93 }
94