1 /* $NetBSD: virtio_mainbus.c,v 1.2 2024/03/09 11:16:31 isaki Exp $ */
2
3 /*
4 * Copyright (c) 2021, 2024 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Reinoud Zandijk and by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: virtio_mainbus.c,v 1.2 2024/03/09 11:16:31 isaki Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37
38 #include <sys/device.h>
39
40 #include <virt68k/dev/mainbusvar.h>
41
42 #define VIRTIO_PRIVATE
43 #include <dev/virtio/virtio_mmiovar.h>
44
45
46 static int virtio_mainbus_match(device_t, cfdata_t, void *);
47 static void virtio_mainbus_attach(device_t, device_t, void *);
48 static int virtio_mainbus_rescan(device_t, const char *, const int *);
49 static int virtio_mainbus_detach(device_t, int);
50
51 static int virtio_mainbus_alloc_interrupts(struct virtio_mmio_softc *);
52 static void virtio_mainbus_free_interrupts(struct virtio_mmio_softc *);
53
54 struct virtio_mainbus_softc {
55 struct virtio_mmio_softc sc_msc;
56
57 int sc_irq;
58 };
59
60
61 CFATTACH_DECL3_NEW(virtio_mainbus, sizeof(struct virtio_mainbus_softc),
62 virtio_mainbus_match, virtio_mainbus_attach,
63 virtio_mainbus_detach, NULL,
64 virtio_mainbus_rescan, (void *)voidop, 0);
65
66
67 static const struct device_compatible_entry compat_data[] = {
68 { .compat = "virtio,mmio" },
69 DEVICE_COMPAT_EOL
70 };
71
72
73 static int
virtio_mainbus_match(device_t parent,cfdata_t match,void * aux)74 virtio_mainbus_match(device_t parent, cfdata_t match, void *aux)
75 {
76 struct mainbus_attach_args *ma = aux;
77
78 return mainbus_compatible_match(ma, compat_data);
79 }
80
81
82 void
virtio_mainbus_attach(device_t parent,device_t self,void * aux)83 virtio_mainbus_attach(device_t parent, device_t self, void *aux)
84 {
85 struct virtio_mainbus_softc *sc = device_private(self);
86 struct virtio_mmio_softc *msc = &sc->sc_msc;
87 struct virtio_softc *vsc = &msc->sc_sc;
88 struct mainbus_attach_args *ma = aux;
89 bus_space_handle_t bsh;
90
91 if (bus_space_map(ma->ma_st, ma->ma_addr, ma->ma_size, 0, &bsh) != 0) {
92 aprint_error(": can't map i/o space\n");
93 return;
94 }
95
96 aprint_normal("\n");
97 aprint_naive("\n");
98
99 sc->sc_irq = ma->ma_irq;
100
101 msc->sc_iot = ma->ma_st;
102 msc->sc_ioh = bsh;
103 msc->sc_iosize = ma->ma_size;
104 msc->sc_alloc_interrupts = virtio_mainbus_alloc_interrupts;
105 msc->sc_free_interrupts = virtio_mainbus_free_interrupts;
106
107 vsc->sc_dev = self;
108 vsc->sc_dmat = ma->ma_dmat;
109 virtio_mmio_common_attach(msc);
110
111 virtio_mainbus_rescan(self, NULL, NULL);
112 }
113
114
115 /* ARGSUSED */
116 static int
virtio_mainbus_rescan(device_t self,const char * ifattr,const int * locs)117 virtio_mainbus_rescan(device_t self, const char *ifattr, const int *locs)
118 {
119 struct virtio_mainbus_softc *sc = device_private(self);
120 struct virtio_mmio_softc *msc = &sc->sc_msc;
121 struct virtio_softc *vsc = &msc->sc_sc;
122 struct virtio_attach_args va;
123
124 if (vsc->sc_child) /* child already attached? */
125 return 0;
126
127 memset(&va, 0, sizeof(va));
128 va.sc_childdevid = vsc->sc_childdevid;
129
130 config_found(self, &va, NULL, CFARGS_NONE);
131
132 if (virtio_attach_failed(vsc))
133 return 0;
134 return 0;
135 }
136
137
138 static int
virtio_mainbus_detach(device_t self,int flags)139 virtio_mainbus_detach(device_t self, int flags)
140 {
141 struct virtio_mainbus_softc *sc = device_private(self);
142 struct virtio_mmio_softc * const msc = &sc->sc_msc;
143
144 return virtio_mmio_common_detach(msc, flags);
145 }
146
147
148 static int
virtio_mainbus_alloc_interrupts(struct virtio_mmio_softc * msc)149 virtio_mainbus_alloc_interrupts(struct virtio_mmio_softc *msc)
150 {
151 struct virtio_mainbus_softc *sc = (struct virtio_mainbus_softc *) msc;
152 struct virtio_softc * const vsc = &msc->sc_sc;
153 char strbuf[INTR_STRING_BUFSIZE];
154
155 msc->sc_ih = intr_establish(virtio_mmio_intr, msc,
156 sc->sc_irq, IPL_VM/*XXX*/, 0);
157 if (msc->sc_ih == NULL) {
158 aprint_error_dev(vsc->sc_dev,
159 "couldn't install interrupt handler\n");
160 return -1;
161 }
162
163 aprint_normal_dev(vsc->sc_dev, "interrupting at %s\n",
164 intr_string(msc->sc_ih, strbuf, sizeof(strbuf)));
165
166 return 0;
167 }
168
169
170 static void
virtio_mainbus_free_interrupts(struct virtio_mmio_softc * msc)171 virtio_mainbus_free_interrupts(struct virtio_mmio_softc *msc)
172 {
173 if (msc->sc_ih) {
174 intr_disestablish(msc->sc_ih);
175 msc->sc_ih = NULL;
176 }
177 }
178