1 /* $NetBSD: vmbus_acpi.c,v 1.4 2021/01/29 15:49:55 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2018 Kimihiro Nonaka <nonaka@NetBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
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,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: vmbus_acpi.c,v 1.4 2021/01/29 15:49:55 thorpej Exp $");
30
31 #include <sys/param.h>
32 #include <sys/device.h>
33 #include <sys/systm.h>
34 #include <sys/kmem.h>
35
36 #include <dev/acpi/acpireg.h>
37 #include <dev/acpi/acpivar.h>
38
39 #include <dev/hyperv/vmbusvar.h>
40
41 #define _COMPONENT ACPI_RESOURCE_COMPONENT
42 ACPI_MODULE_NAME ("vmbus_acpi")
43
44 static int vmbus_acpi_match(device_t, cfdata_t, void *);
45 static void vmbus_acpi_attach(device_t, device_t, void *);
46 static int vmbus_acpi_detach(device_t, int);
47
48 struct vmbus_acpi_softc {
49 struct vmbus_softc sc;
50 };
51
52 CFATTACH_DECL_NEW(vmbus_acpi, sizeof(struct vmbus_acpi_softc),
53 vmbus_acpi_match, vmbus_acpi_attach, vmbus_acpi_detach, NULL);
54
55 static const struct device_compatible_entry compat_data[] = {
56 { .compat = "VMBUS" },
57 { .compat = "VMBus" },
58 DEVICE_COMPAT_EOL
59 };
60
61 static int
vmbus_acpi_match(device_t parent,cfdata_t match,void * opaque)62 vmbus_acpi_match(device_t parent, cfdata_t match, void *opaque)
63 {
64 struct acpi_attach_args *aa = opaque;
65 int ret;
66
67 ret = acpi_compatible_match(aa, compat_data);
68
69 if (!vmbus_match(parent, match, opaque))
70 return 0;
71
72 return ret;
73 }
74
75 static void
vmbus_acpi_attach(device_t parent,device_t self,void * opaque)76 vmbus_acpi_attach(device_t parent, device_t self, void *opaque)
77 {
78 struct vmbus_acpi_softc *sc = device_private(self);
79 struct acpi_attach_args *aa = opaque;
80
81 sc->sc.sc_dev = self;
82 sc->sc.sc_iot = aa->aa_iot;
83 sc->sc.sc_memt = aa->aa_memt;
84 sc->sc.sc_dmat = BUS_DMA_TAG_VALID(aa->aa_dmat64) ?
85 aa->aa_dmat64 : aa->aa_dmat;
86
87 if (vmbus_attach(&sc->sc))
88 return;
89
90 (void)pmf_device_register(self, NULL, NULL);
91 }
92
93 static int
vmbus_acpi_detach(device_t self,int flags)94 vmbus_acpi_detach(device_t self, int flags)
95 {
96 struct vmbus_acpi_softc *sc = device_private(self);
97 int rv;
98
99 rv = vmbus_detach(&sc->sc, flags);
100 if (rv)
101 return rv;
102
103 pmf_device_deregister(self);
104
105 return 0;
106 }
107