1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*-
* Copyright (c) 2011, Bryan Venteicher <bryanv@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "virtio.h"
static const char *virtio_feature_name(unsigned long feature, struct virtio_feature_desc *);
//TODO : This structure may change depending on the types of devices we support.
static struct virtio_ident {
unsigned short devid;
const char *name;
} virtio_ident_table[] = {
{ VIRTIO_ID_NETWORK, "Network" },
{ VIRTIO_ID_BLOCK, "Block" },
{ VIRTIO_ID_CONSOLE, "Console" },
{ VIRTIO_ID_ENTROPY, "Entropy" },
{ VIRTIO_ID_BALLOON, "Balloon" },
{ VIRTIO_ID_IOMEMORY, "IOMemory" },
{ VIRTIO_ID_SCSI, "SCSI" },
{ VIRTIO_ID_9P, "9P Transport" },
{ 0, NULL }
};
/* Device independent features. */
static struct virtio_feature_desc virtio_common_feature_desc[] = {
{ VIRTIO_F_NOTIFY_ON_EMPTY, "NotifyOnEmpty" },
{ VIRTIO_RING_F_INDIRECT_DESC, "RingIndirect" },
{ VIRTIO_RING_F_EVENT_IDX, "EventIdx" },
{ VIRTIO_F_BAD_FEATURE, "BadFeature" },
{ 0, NULL }
};
const char *
virtio_dev_name(unsigned short devid)
{
struct virtio_ident *ident;
for (ident = virtio_ident_table; ident->name != NULL; ident++) {
if (ident->devid == devid)
return (ident->name);
}
return (NULL);
}
static const char *
virtio_feature_name(unsigned long val, struct virtio_feature_desc *desc)
{
int i, j;
struct virtio_feature_desc *descs[2] = { desc,
virtio_common_feature_desc };
for (i = 0; i < 2; i++) {
if (descs[i] == NULL)
continue;
for (j = 0; descs[i][j].vfd_val != 0; j++) {
if (val == descs[i][j].vfd_val)
return (descs[i][j].vfd_str);
}
}
return (NULL);
}
void virtio_describe(struct virtio_device *dev, const char *msg,
uint32_t features, struct virtio_feature_desc *desc)
{
// TODO: Not used currently - keeping it for future use
virtio_feature_name(0,desc);
}
|
