root / include / hw / virtio / virtio.h @ 0d09e41a
History | View | Annotate | Download (11.2 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/hw.h" |
18 |
#include "net/net.h" |
19 |
#include "hw/qdev.h" |
20 |
#include "sysemu/sysemu.h" |
21 |
#include "qemu/event_notifier.h" |
22 |
#ifdef CONFIG_VIRTFS
|
23 |
#include "hw/virtio/virtio-9p.h" |
24 |
#endif
|
25 |
|
26 |
/* from Linux's linux/virtio_config.h */
|
27 |
|
28 |
/* Status byte for guest to report progress, and synchronize features. */
|
29 |
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
|
30 |
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
31 |
/* We have found a driver for the device. */
|
32 |
#define VIRTIO_CONFIG_S_DRIVER 2 |
33 |
/* Driver has used its parts of the config, and is happy */
|
34 |
#define VIRTIO_CONFIG_S_DRIVER_OK 4 |
35 |
/* We've given up on this device. */
|
36 |
#define VIRTIO_CONFIG_S_FAILED 0x80 |
37 |
|
38 |
/* Some virtio feature bits (currently bits 28 through 31) are reserved for the
|
39 |
* transport being used (eg. virtio_ring), the rest are per-device feature bits. */
|
40 |
#define VIRTIO_TRANSPORT_F_START 28 |
41 |
#define VIRTIO_TRANSPORT_F_END 32 |
42 |
|
43 |
/* We notify when the ring is completely used, even if the guest is suppressing
|
44 |
* callbacks */
|
45 |
#define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
46 |
/* We support indirect buffer descriptors */
|
47 |
#define VIRTIO_RING_F_INDIRECT_DESC 28 |
48 |
/* The Guest publishes the used index for which it expects an interrupt
|
49 |
* at the end of the avail ring. Host should ignore the avail->flags field. */
|
50 |
/* The Host publishes the avail index for which it expects a kick
|
51 |
* at the end of the used ring. Guest should ignore the used->flags field. */
|
52 |
#define VIRTIO_RING_F_EVENT_IDX 29 |
53 |
/* A guest should never accept this. It implies negotiation is broken. */
|
54 |
#define VIRTIO_F_BAD_FEATURE 30 |
55 |
|
56 |
/* from Linux's linux/virtio_ring.h */
|
57 |
|
58 |
/* This marks a buffer as continuing via the next field. */
|
59 |
#define VRING_DESC_F_NEXT 1 |
60 |
/* This marks a buffer as write-only (otherwise read-only). */
|
61 |
#define VRING_DESC_F_WRITE 2 |
62 |
/* This means the buffer contains a list of buffer descriptors. */
|
63 |
#define VRING_DESC_F_INDIRECT 4 |
64 |
|
65 |
/* This means don't notify other side when buffer added. */
|
66 |
#define VRING_USED_F_NO_NOTIFY 1 |
67 |
/* This means don't interrupt guest when buffer consumed. */
|
68 |
#define VRING_AVAIL_F_NO_INTERRUPT 1 |
69 |
|
70 |
struct VirtQueue;
|
71 |
|
72 |
static inline hwaddr vring_align(hwaddr addr, |
73 |
unsigned long align) |
74 |
{ |
75 |
return (addr + align - 1) & ~(align - 1); |
76 |
} |
77 |
|
78 |
typedef struct VirtQueue VirtQueue; |
79 |
|
80 |
#define VIRTQUEUE_MAX_SIZE 1024 |
81 |
|
82 |
typedef struct VirtQueueElement |
83 |
{ |
84 |
unsigned int index; |
85 |
unsigned int out_num; |
86 |
unsigned int in_num; |
87 |
hwaddr in_addr[VIRTQUEUE_MAX_SIZE]; |
88 |
hwaddr out_addr[VIRTQUEUE_MAX_SIZE]; |
89 |
struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
|
90 |
struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
|
91 |
} VirtQueueElement; |
92 |
|
93 |
typedef struct { |
94 |
void (*notify)(DeviceState *d, uint16_t vector);
|
95 |
void (*save_config)(DeviceState *d, QEMUFile *f);
|
96 |
void (*save_queue)(DeviceState *d, int n, QEMUFile *f); |
97 |
int (*load_config)(DeviceState *d, QEMUFile *f);
|
98 |
int (*load_queue)(DeviceState *d, int n, QEMUFile *f); |
99 |
int (*load_done)(DeviceState *d, QEMUFile *f);
|
100 |
unsigned (*get_features)(DeviceState *d);
|
101 |
bool (*query_guest_notifiers)(DeviceState *d);
|
102 |
int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assigned); |
103 |
int (*set_host_notifier)(DeviceState *d, int n, bool assigned); |
104 |
void (*vmstate_change)(DeviceState *d, bool running); |
105 |
} VirtIOBindings; |
106 |
|
107 |
#define VIRTIO_PCI_QUEUE_MAX 64 |
108 |
|
109 |
#define VIRTIO_NO_VECTOR 0xffff |
110 |
|
111 |
#define TYPE_VIRTIO_DEVICE "virtio-device" |
112 |
#define VIRTIO_DEVICE_GET_CLASS(obj) \
|
113 |
OBJECT_GET_CLASS(VirtioDeviceClass, obj, TYPE_VIRTIO_DEVICE) |
114 |
#define VIRTIO_DEVICE_CLASS(klass) \
|
115 |
OBJECT_CLASS_CHECK(VirtioDeviceClass, klass, TYPE_VIRTIO_DEVICE) |
116 |
#define VIRTIO_DEVICE(obj) \
|
117 |
OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE) |
118 |
|
119 |
struct VirtIODevice
|
120 |
{ |
121 |
DeviceState parent_obj; |
122 |
const char *name; |
123 |
uint8_t status; |
124 |
uint8_t isr; |
125 |
uint16_t queue_sel; |
126 |
uint32_t guest_features; |
127 |
size_t config_len; |
128 |
void *config;
|
129 |
uint16_t config_vector; |
130 |
int nvectors;
|
131 |
/*
|
132 |
* Function pointers will be removed at the end of the series as they are in
|
133 |
* VirtioDeviceClass.
|
134 |
*/
|
135 |
uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features); |
136 |
uint32_t (*bad_features)(VirtIODevice *vdev); |
137 |
void (*set_features)(VirtIODevice *vdev, uint32_t val);
|
138 |
void (*get_config)(VirtIODevice *vdev, uint8_t *config);
|
139 |
void (*set_config)(VirtIODevice *vdev, const uint8_t *config); |
140 |
void (*reset)(VirtIODevice *vdev);
|
141 |
void (*set_status)(VirtIODevice *vdev, uint8_t val);
|
142 |
/* Test and clear event pending status.
|
143 |
* Should be called after unmask to avoid losing events.
|
144 |
* If backend does not support masking,
|
145 |
* must check in frontend instead.
|
146 |
*/
|
147 |
bool (*guest_notifier_pending)(VirtIODevice *vdev, int n); |
148 |
/* Mask/unmask events from this vq. Any events reported
|
149 |
* while masked will become pending.
|
150 |
* If backend does not support masking,
|
151 |
* must mask in frontend instead.
|
152 |
*/
|
153 |
void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask); |
154 |
|
155 |
VirtQueue *vq; |
156 |
const VirtIOBindings *binding;
|
157 |
DeviceState *binding_opaque; |
158 |
uint16_t device_id; |
159 |
bool vm_running;
|
160 |
VMChangeStateEntry *vmstate; |
161 |
}; |
162 |
|
163 |
typedef struct VirtioDeviceClass { |
164 |
/* This is what a VirtioDevice must implement */
|
165 |
DeviceClass parent; |
166 |
int (*init)(VirtIODevice *vdev);
|
167 |
uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features); |
168 |
uint32_t (*bad_features)(VirtIODevice *vdev); |
169 |
void (*set_features)(VirtIODevice *vdev, uint32_t val);
|
170 |
void (*get_config)(VirtIODevice *vdev, uint8_t *config);
|
171 |
void (*set_config)(VirtIODevice *vdev, const uint8_t *config); |
172 |
void (*reset)(VirtIODevice *vdev);
|
173 |
void (*set_status)(VirtIODevice *vdev, uint8_t val);
|
174 |
} VirtioDeviceClass; |
175 |
|
176 |
void virtio_init(VirtIODevice *vdev, const char *name, |
177 |
uint16_t device_id, size_t config_size); |
178 |
void virtio_common_cleanup(VirtIODevice *vdev);
|
179 |
|
180 |
VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
|
181 |
void (*handle_output)(VirtIODevice *,
|
182 |
VirtQueue *)); |
183 |
|
184 |
void virtio_del_queue(VirtIODevice *vdev, int n); |
185 |
|
186 |
void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, |
187 |
unsigned int len); |
188 |
void virtqueue_flush(VirtQueue *vq, unsigned int count); |
189 |
void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, |
190 |
unsigned int len, unsigned int idx); |
191 |
|
192 |
void virtqueue_map_sg(struct iovec *sg, hwaddr *addr, |
193 |
size_t num_sg, int is_write);
|
194 |
int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
|
195 |
int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes, |
196 |
unsigned int out_bytes); |
197 |
void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, |
198 |
unsigned int *out_bytes, |
199 |
unsigned max_in_bytes, unsigned max_out_bytes); |
200 |
|
201 |
void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
|
202 |
|
203 |
void virtio_save(VirtIODevice *vdev, QEMUFile *f);
|
204 |
|
205 |
int virtio_load(VirtIODevice *vdev, QEMUFile *f);
|
206 |
|
207 |
void virtio_cleanup(VirtIODevice *vdev);
|
208 |
|
209 |
void virtio_notify_config(VirtIODevice *vdev);
|
210 |
|
211 |
void virtio_queue_set_notification(VirtQueue *vq, int enable); |
212 |
|
213 |
int virtio_queue_ready(VirtQueue *vq);
|
214 |
|
215 |
int virtio_queue_empty(VirtQueue *vq);
|
216 |
|
217 |
/* Host binding interface. */
|
218 |
|
219 |
VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, |
220 |
size_t config_size, size_t struct_size); |
221 |
uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |
222 |
uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); |
223 |
uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); |
224 |
void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
225 |
void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
226 |
void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
227 |
void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); |
228 |
hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n);
|
229 |
int virtio_queue_get_num(VirtIODevice *vdev, int n); |
230 |
void virtio_queue_notify(VirtIODevice *vdev, int n); |
231 |
uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
|
232 |
void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); |
233 |
void virtio_set_status(VirtIODevice *vdev, uint8_t val);
|
234 |
void virtio_reset(void *opaque); |
235 |
void virtio_update_irq(VirtIODevice *vdev);
|
236 |
int virtio_set_features(VirtIODevice *vdev, uint32_t val);
|
237 |
|
238 |
void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, |
239 |
DeviceState *opaque); |
240 |
|
241 |
/* Base devices. */
|
242 |
typedef struct VirtIOBlkConf VirtIOBlkConf; |
243 |
struct virtio_net_conf;
|
244 |
VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
245 |
struct virtio_net_conf *net,
|
246 |
uint32_t host_features); |
247 |
typedef struct virtio_serial_conf virtio_serial_conf; |
248 |
VirtIODevice *virtio_serial_init(DeviceState *dev, virtio_serial_conf *serial); |
249 |
VirtIODevice *virtio_balloon_init(DeviceState *dev); |
250 |
typedef struct VirtIOSCSIConf VirtIOSCSIConf; |
251 |
VirtIODevice *virtio_scsi_init(DeviceState *dev, VirtIOSCSIConf *conf); |
252 |
typedef struct VirtIORNGConf VirtIORNGConf; |
253 |
VirtIODevice *virtio_rng_init(DeviceState *dev, VirtIORNGConf *conf); |
254 |
#ifdef CONFIG_VIRTFS
|
255 |
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf); |
256 |
#endif
|
257 |
|
258 |
|
259 |
void virtio_net_exit(VirtIODevice *vdev);
|
260 |
void virtio_serial_exit(VirtIODevice *vdev);
|
261 |
void virtio_balloon_exit(VirtIODevice *vdev);
|
262 |
void virtio_scsi_exit(VirtIODevice *vdev);
|
263 |
void virtio_rng_exit(VirtIODevice *vdev);
|
264 |
|
265 |
#define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
|
266 |
DEFINE_PROP_BIT("indirect_desc", _state, _field, \
|
267 |
VIRTIO_RING_F_INDIRECT_DESC, true), \
|
268 |
DEFINE_PROP_BIT("event_idx", _state, _field, \
|
269 |
VIRTIO_RING_F_EVENT_IDX, true)
|
270 |
|
271 |
hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
|
272 |
hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
|
273 |
hwaddr virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
|
274 |
hwaddr virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
|
275 |
hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
|
276 |
hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
|
277 |
hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n);
|
278 |
hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
|
279 |
uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
|
280 |
void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); |
281 |
VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
|
282 |
uint16_t virtio_get_queue_index(VirtQueue *vq); |
283 |
int virtio_queue_get_id(VirtQueue *vq);
|
284 |
EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); |
285 |
void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign, |
286 |
bool with_irqfd);
|
287 |
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); |
288 |
void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign, |
289 |
bool set_handler);
|
290 |
void virtio_queue_notify_vq(VirtQueue *vq);
|
291 |
void virtio_irq(VirtQueue *vq);
|
292 |
#endif
|