root / hw / virtio.h @ cc9f28bc
History | View | Annotate | Download (5.7 kB)
1 |
/*
|
---|---|
2 |
* Virtio Support
|
3 |
*
|
4 |
* Copyright IBM, Corp. 2007
|
5 |
*
|
6 |
* Authors:
|
7 |
* Anthony Liguori <aliguori@us.ibm.com>
|
8 |
*
|
9 |
* This work is licensed under the terms of the GNU GPL, version 2. See
|
10 |
* the COPYING file in the top-level directory.
|
11 |
*
|
12 |
*/
|
13 |
|
14 |
#ifndef _QEMU_VIRTIO_H
|
15 |
#define _QEMU_VIRTIO_H
|
16 |
|
17 |
#include "hw.h" |
18 |
#include "net.h" |
19 |
#include "qdev.h" |
20 |
#include "sysemu.h" |
21 |
|
22 |
/* from Linux's linux/virtio_config.h */
|
23 |
|
24 |
/* Status byte for guest to report progress, and synchronize features. */
|
25 |
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
|
26 |
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
27 |
/* We have found a driver for the device. */
|
28 |
#define VIRTIO_CONFIG_S_DRIVER 2 |
29 |
/* Driver has used its parts of the config, and is happy */
|
30 |
#define VIRTIO_CONFIG_S_DRIVER_OK 4 |
31 |
/* We've given up on this device. */
|
32 |
#define VIRTIO_CONFIG_S_FAILED 0x80 |
33 |
|
34 |
/* We notify when the ring is completely used, even if the guest is suppressing
|
35 |
* callbacks */
|
36 |
#define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
37 |
/* We support indirect buffer descriptors */
|
38 |
#define VIRTIO_RING_F_INDIRECT_DESC 28 |
39 |
/* A guest should never accept this. It implies negotiation is broken. */
|
40 |
#define VIRTIO_F_BAD_FEATURE 30 |
41 |
|
42 |
/* from Linux's linux/virtio_ring.h */
|
43 |
|
44 |
/* This marks a buffer as continuing via the next field. */
|
45 |
#define VRING_DESC_F_NEXT 1 |
46 |
/* This marks a buffer as write-only (otherwise read-only). */
|
47 |
#define VRING_DESC_F_WRITE 2 |
48 |
/* This means the buffer contains a list of buffer descriptors. */
|
49 |
#define VRING_DESC_F_INDIRECT 4 |
50 |
|
51 |
/* This means don't notify other side when buffer added. */
|
52 |
#define VRING_USED_F_NO_NOTIFY 1 |
53 |
/* This means don't interrupt guest when buffer consumed. */
|
54 |
#define VRING_AVAIL_F_NO_INTERRUPT 1 |
55 |
|
56 |
struct VirtQueue;
|
57 |
|
58 |
static inline target_phys_addr_t vring_align(target_phys_addr_t addr, |
59 |
unsigned long align) |
60 |
{ |
61 |
return (addr + align - 1) & ~(align - 1); |
62 |
} |
63 |
|
64 |
typedef struct VirtQueue VirtQueue; |
65 |
typedef struct VirtIODevice VirtIODevice; |
66 |
|
67 |
#define VIRTQUEUE_MAX_SIZE 1024 |
68 |
|
69 |
typedef struct VirtQueueElement |
70 |
{ |
71 |
unsigned int index; |
72 |
unsigned int out_num; |
73 |
unsigned int in_num; |
74 |
target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE]; |
75 |
struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
|
76 |
struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
|
77 |
} VirtQueueElement; |
78 |
|
79 |
typedef struct { |
80 |
void (*notify)(void * opaque, uint16_t vector); |
81 |
void (*save_config)(void * opaque, QEMUFile *f); |
82 |
void (*save_queue)(void * opaque, int n, QEMUFile *f); |
83 |
int (*load_config)(void * opaque, QEMUFile *f); |
84 |
int (*load_queue)(void * opaque, int n, QEMUFile *f); |
85 |
} VirtIOBindings; |
86 |
|
87 |
#define VIRTIO_PCI_QUEUE_MAX 16 |
88 |
|
89 |
#define VIRTIO_NO_VECTOR 0xffff |
90 |
|
91 |
struct VirtIODevice
|
92 |
{ |
93 |
const char *name; |
94 |
uint8_t status; |
95 |
uint8_t isr; |
96 |
uint16_t queue_sel; |
97 |
uint32_t features; |
98 |
size_t config_len; |
99 |
void *config;
|
100 |
uint16_t config_vector; |
101 |
int nvectors;
|
102 |
uint32_t (*get_features)(VirtIODevice *vdev); |
103 |
uint32_t (*bad_features)(VirtIODevice *vdev); |
104 |
void (*set_features)(VirtIODevice *vdev, uint32_t val);
|
105 |
void (*get_config)(VirtIODevice *vdev, uint8_t *config);
|
106 |
void (*set_config)(VirtIODevice *vdev, const uint8_t *config); |
107 |
void (*reset)(VirtIODevice *vdev);
|
108 |
VirtQueue *vq; |
109 |
const VirtIOBindings *binding;
|
110 |
void *binding_opaque;
|
111 |
uint16_t device_id; |
112 |
}; |
113 |
|
114 |
VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
|
115 |
void (*handle_output)(VirtIODevice *,
|
116 |
VirtQueue *)); |
117 |
|
118 |
void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, |
119 |
unsigned int len); |
120 |
void virtqueue_flush(VirtQueue *vq, unsigned int count); |
121 |
void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, |
122 |
unsigned int len, unsigned int idx); |
123 |
|
124 |
int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
|
125 |
int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes); |
126 |
|
127 |
void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
|
128 |
|
129 |
void virtio_save(VirtIODevice *vdev, QEMUFile *f);
|
130 |
|
131 |
int virtio_load(VirtIODevice *vdev, QEMUFile *f);
|
132 |
|
133 |
void virtio_cleanup(VirtIODevice *vdev);
|
134 |
|
135 |
void virtio_notify_config(VirtIODevice *vdev);
|
136 |
|
137 |
void virtio_queue_set_notification(VirtQueue *vq, int enable); |
138 |
|
139 |
int virtio_queue_ready(VirtQueue *vq);
|
140 |
|
141 |
int virtio_queue_empty(VirtQueue *vq);
|
142 |
|
143 |
/* Host binding interface. */
|
144 |
|
145 |
VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, |
146 |
size_t config_size, size_t struct_size); |
147 |
uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |
148 |
uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); |
149 |
uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); |
150 |
void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
151 |
void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
152 |
void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
153 |
void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr); |
154 |
target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
|
155 |
int virtio_queue_get_num(VirtIODevice *vdev, int n); |
156 |
void virtio_queue_notify(VirtIODevice *vdev, int n); |
157 |
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
|
158 |
void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); |
159 |
void virtio_reset(void *opaque); |
160 |
void virtio_update_irq(VirtIODevice *vdev);
|
161 |
|
162 |
void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, |
163 |
void *opaque);
|
164 |
|
165 |
/* Base devices. */
|
166 |
VirtIODevice *virtio_blk_init(DeviceState *dev, DriveInfo *dinfo); |
167 |
VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf); |
168 |
VirtIODevice *virtio_console_init(DeviceState *dev); |
169 |
VirtIODevice *virtio_balloon_init(DeviceState *dev); |
170 |
|
171 |
void virtio_net_exit(VirtIODevice *vdev);
|
172 |
|
173 |
#endif
|