virtio_pci.c revision 1.1.2.2 1 1.1.2.2 skrll /* $NetBSD: virtio_pci.c,v 1.1.2.2 2017/08/28 17:52:25 skrll Exp $ */
2 1.1.2.2 skrll
3 1.1.2.2 skrll /*
4 1.1.2.2 skrll * Copyright (c) 2010 Minoura Makoto.
5 1.1.2.2 skrll * All rights reserved.
6 1.1.2.2 skrll *
7 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without
8 1.1.2.2 skrll * modification, are permitted provided that the following conditions
9 1.1.2.2 skrll * are met:
10 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright
11 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer.
12 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright
13 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the
14 1.1.2.2 skrll * documentation and/or other materials provided with the distribution.
15 1.1.2.2 skrll *
16 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 1.1.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 1.1.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 1.1.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 1.1.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 1.1.2.2 skrll * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 1.1.2.2 skrll * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 1.1.2.2 skrll * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 1.1.2.2 skrll * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 1.1.2.2 skrll * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 1.1.2.2 skrll */
27 1.1.2.2 skrll
28 1.1.2.2 skrll #include <sys/cdefs.h>
29 1.1.2.2 skrll __KERNEL_RCSID(0, "$NetBSD");
30 1.1.2.2 skrll
31 1.1.2.2 skrll #include <sys/param.h>
32 1.1.2.2 skrll #include <sys/systm.h>
33 1.1.2.2 skrll
34 1.1.2.2 skrll #include <sys/device.h>
35 1.1.2.2 skrll
36 1.1.2.2 skrll #include <dev/pci/pcidevs.h>
37 1.1.2.2 skrll #include <dev/pci/pcireg.h>
38 1.1.2.2 skrll #include <dev/pci/pcivar.h>
39 1.1.2.2 skrll
40 1.1.2.2 skrll #define VIRTIO_PRIVATE
41 1.1.2.2 skrll
42 1.1.2.2 skrll #include <dev/pci/virtioreg.h> /* XXX: move to non-pci */
43 1.1.2.2 skrll #include <dev/pci/virtiovar.h> /* XXX: move to non-pci */
44 1.1.2.2 skrll
45 1.1.2.2 skrll static int virtio_match(device_t, cfdata_t, void *);
46 1.1.2.2 skrll static void virtio_attach(device_t, device_t, void *);
47 1.1.2.2 skrll static int virtio_rescan(device_t, const char *, const int *);
48 1.1.2.2 skrll static int virtio_detach(device_t, int);
49 1.1.2.2 skrll
50 1.1.2.2 skrll static const char *virtio_device_name[] = {
51 1.1.2.2 skrll "Unknown (0)", /* 0 */
52 1.1.2.2 skrll "Network", /* 1 */
53 1.1.2.2 skrll "Block", /* 2 */
54 1.1.2.2 skrll "Console", /* 3 */
55 1.1.2.2 skrll "Entropy", /* 4 */
56 1.1.2.2 skrll "Memory Balloon", /* 5 */
57 1.1.2.2 skrll "I/O Memory", /* 6 */
58 1.1.2.2 skrll "Remote Processor Messaging", /* 7 */
59 1.1.2.2 skrll "SCSI", /* 8 */
60 1.1.2.2 skrll "9P Transport", /* 9 */
61 1.1.2.2 skrll "mac80211 wlan", /* 10 */
62 1.1.2.2 skrll };
63 1.1.2.2 skrll #define NDEVNAMES __arraycount(virtio_device_name)
64 1.1.2.2 skrll
65 1.1.2.2 skrll CFATTACH_DECL3_NEW(virtio_pci, sizeof(struct virtio_softc),
66 1.1.2.2 skrll virtio_match, virtio_attach, virtio_detach, NULL, virtio_rescan, NULL,
67 1.1.2.2 skrll DVF_DETACH_SHUTDOWN);
68 1.1.2.2 skrll
69 1.1.2.2 skrll static int
70 1.1.2.2 skrll virtio_match(device_t parent, cfdata_t match, void *aux)
71 1.1.2.2 skrll {
72 1.1.2.2 skrll struct pci_attach_args *pa;
73 1.1.2.2 skrll
74 1.1.2.2 skrll pa = (struct pci_attach_args *)aux;
75 1.1.2.2 skrll switch (PCI_VENDOR(pa->pa_id)) {
76 1.1.2.2 skrll case PCI_VENDOR_QUMRANET:
77 1.1.2.2 skrll if ((PCI_PRODUCT_QUMRANET_VIRTIO_1000 <=
78 1.1.2.2 skrll PCI_PRODUCT(pa->pa_id)) &&
79 1.1.2.2 skrll (PCI_PRODUCT(pa->pa_id) <=
80 1.1.2.2 skrll PCI_PRODUCT_QUMRANET_VIRTIO_103F))
81 1.1.2.2 skrll return 1;
82 1.1.2.2 skrll break;
83 1.1.2.2 skrll }
84 1.1.2.2 skrll
85 1.1.2.2 skrll return 0;
86 1.1.2.2 skrll }
87 1.1.2.2 skrll
88 1.1.2.2 skrll static void
89 1.1.2.2 skrll virtio_attach(device_t parent, device_t self, void *aux)
90 1.1.2.2 skrll {
91 1.1.2.2 skrll struct virtio_softc *sc = device_private(self);
92 1.1.2.2 skrll struct pci_attach_args *pa = (struct pci_attach_args *)aux;
93 1.1.2.2 skrll pci_chipset_tag_t pc = pa->pa_pc;
94 1.1.2.2 skrll pcitag_t tag = pa->pa_tag;
95 1.1.2.2 skrll int revision;
96 1.1.2.2 skrll pcireg_t id;
97 1.1.2.2 skrll
98 1.1.2.2 skrll revision = PCI_REVISION(pa->pa_class);
99 1.1.2.2 skrll if (revision != 0) {
100 1.1.2.2 skrll aprint_normal(": unknown revision 0x%02x; giving up\n",
101 1.1.2.2 skrll revision);
102 1.1.2.2 skrll return;
103 1.1.2.2 skrll }
104 1.1.2.2 skrll aprint_normal("\n");
105 1.1.2.2 skrll aprint_naive("\n");
106 1.1.2.2 skrll
107 1.1.2.2 skrll /* subsystem ID shows what I am */
108 1.1.2.2 skrll id = pci_conf_read(pc, tag, PCI_SUBSYS_ID_REG);
109 1.1.2.2 skrll aprint_normal_dev(self, "Virtio %s Device (rev. 0x%02x)\n",
110 1.1.2.2 skrll (PCI_SUBSYS_ID(id) < NDEVNAMES?
111 1.1.2.2 skrll virtio_device_name[PCI_SUBSYS_ID(id)] : "Unknown"),
112 1.1.2.2 skrll revision);
113 1.1.2.2 skrll
114 1.1.2.2 skrll sc->sc_dev = self;
115 1.1.2.2 skrll sc->sc_pc = pc;
116 1.1.2.2 skrll sc->sc_tag = tag;
117 1.1.2.2 skrll sc->sc_iot = pa->pa_iot;
118 1.1.2.2 skrll if (pci_dma64_available(pa))
119 1.1.2.2 skrll sc->sc_dmat = pa->pa_dmat64;
120 1.1.2.2 skrll else
121 1.1.2.2 skrll sc->sc_dmat = pa->pa_dmat;
122 1.1.2.2 skrll sc->sc_config_offset = VIRTIO_CONFIG_DEVICE_CONFIG_NOMSI;
123 1.1.2.2 skrll
124 1.1.2.2 skrll if (pci_mapreg_map(pa, PCI_MAPREG_START, PCI_MAPREG_TYPE_IO, 0,
125 1.1.2.2 skrll &sc->sc_iot, &sc->sc_ioh, NULL, &sc->sc_iosize)) {
126 1.1.2.2 skrll aprint_error_dev(self, "can't map i/o space\n");
127 1.1.2.2 skrll return;
128 1.1.2.2 skrll }
129 1.1.2.2 skrll
130 1.1.2.2 skrll virtio_device_reset(sc);
131 1.1.2.2 skrll virtio_set_status(sc, VIRTIO_CONFIG_DEVICE_STATUS_ACK);
132 1.1.2.2 skrll virtio_set_status(sc, VIRTIO_CONFIG_DEVICE_STATUS_DRIVER);
133 1.1.2.2 skrll
134 1.1.2.2 skrll sc->sc_childdevid = PCI_SUBSYS_ID(id);
135 1.1.2.2 skrll sc->sc_child = NULL;
136 1.1.2.2 skrll sc->sc_pa = *pa;
137 1.1.2.2 skrll virtio_rescan(self, "virtio", 0);
138 1.1.2.2 skrll return;
139 1.1.2.2 skrll }
140 1.1.2.2 skrll
141 1.1.2.2 skrll /* ARGSUSED */
142 1.1.2.2 skrll static int
143 1.1.2.2 skrll virtio_rescan(device_t self, const char *attr, const int *scan_flags)
144 1.1.2.2 skrll {
145 1.1.2.2 skrll struct virtio_softc *sc;
146 1.1.2.2 skrll struct virtio_attach_args va;
147 1.1.2.2 skrll
148 1.1.2.2 skrll sc = device_private(self);
149 1.1.2.2 skrll if (sc->sc_child) /* Child already attached? */
150 1.1.2.2 skrll return 0;
151 1.1.2.2 skrll
152 1.1.2.2 skrll memset(&va, 0, sizeof(va));
153 1.1.2.2 skrll va.sc_childdevid = sc->sc_childdevid;
154 1.1.2.2 skrll
155 1.1.2.2 skrll config_found_ia(self, attr, &va, NULL);
156 1.1.2.2 skrll
157 1.1.2.2 skrll if (sc->sc_child == NULL) {
158 1.1.2.2 skrll aprint_error_dev(self,
159 1.1.2.2 skrll "no matching child driver; not configured\n");
160 1.1.2.2 skrll return 0;
161 1.1.2.2 skrll }
162 1.1.2.2 skrll
163 1.1.2.2 skrll if (sc->sc_child == VIRTIO_CHILD_FAILED) {
164 1.1.2.2 skrll aprint_error_dev(self,
165 1.1.2.2 skrll "virtio configuration failed\n");
166 1.1.2.2 skrll return 0;
167 1.1.2.2 skrll }
168 1.1.2.2 skrll
169 1.1.2.2 skrll /*
170 1.1.2.2 skrll * Make sure child drivers initialize interrupts via call
171 1.1.2.2 skrll * to virtio_child_attach_finish().
172 1.1.2.2 skrll */
173 1.1.2.2 skrll KASSERT(sc->sc_ihs_num != 0);
174 1.1.2.2 skrll
175 1.1.2.2 skrll return 0;
176 1.1.2.2 skrll }
177 1.1.2.2 skrll
178 1.1.2.2 skrll
179 1.1.2.2 skrll static int
180 1.1.2.2 skrll virtio_detach(device_t self, int flags)
181 1.1.2.2 skrll {
182 1.1.2.2 skrll struct virtio_softc *sc = device_private(self);
183 1.1.2.2 skrll int r;
184 1.1.2.2 skrll
185 1.1.2.2 skrll if (sc->sc_child != NULL) {
186 1.1.2.2 skrll r = config_detach(sc->sc_child, flags);
187 1.1.2.2 skrll if (r)
188 1.1.2.2 skrll return r;
189 1.1.2.2 skrll }
190 1.1.2.2 skrll
191 1.1.2.2 skrll /* Check that child detached properly */
192 1.1.2.2 skrll KASSERT(sc->sc_child == NULL);
193 1.1.2.2 skrll KASSERT(sc->sc_vqs == NULL);
194 1.1.2.2 skrll KASSERT(sc->sc_ihs_num == 0);
195 1.1.2.2 skrll
196 1.1.2.2 skrll if (sc->sc_iosize)
197 1.1.2.2 skrll bus_space_unmap(sc->sc_iot, sc->sc_ioh, sc->sc_iosize);
198 1.1.2.2 skrll sc->sc_iosize = 0;
199 1.1.2.2 skrll
200 1.1.2.2 skrll return 0;
201 1.1.2.2 skrll }
202