root / hw / virtio.h @ 71cf9e62
History | View | Annotate | Download (8.6 kB)
1 | 967f97fa | aliguori | /*
|
---|---|---|---|
2 | 967f97fa | aliguori | * Virtio Support
|
3 | 967f97fa | aliguori | *
|
4 | 967f97fa | aliguori | * Copyright IBM, Corp. 2007
|
5 | 967f97fa | aliguori | *
|
6 | 967f97fa | aliguori | * Authors:
|
7 | 967f97fa | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
|
8 | 967f97fa | aliguori | *
|
9 | 967f97fa | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
|
10 | 967f97fa | aliguori | * the COPYING file in the top-level directory.
|
11 | 967f97fa | aliguori | *
|
12 | 967f97fa | aliguori | */
|
13 | 967f97fa | aliguori | |
14 | 967f97fa | aliguori | #ifndef _QEMU_VIRTIO_H
|
15 | 967f97fa | aliguori | #define _QEMU_VIRTIO_H
|
16 | 967f97fa | aliguori | |
17 | 967f97fa | aliguori | #include "hw.h" |
18 | 97b15621 | Gerd Hoffmann | #include "net.h" |
19 | 53c25cea | Paul Brook | #include "qdev.h" |
20 | d176c495 | Gerd Hoffmann | #include "sysemu.h" |
21 | d1a0739d | Markus Armbruster | #include "block.h" |
22 | 1cbdabe2 | Michael S. Tsirkin | #include "event_notifier.h" |
23 | 9f107513 | Anthony Liguori | #ifdef CONFIG_LINUX
|
24 | 9f107513 | Anthony Liguori | #include "9p.h" |
25 | 9f107513 | Anthony Liguori | #endif
|
26 | 967f97fa | aliguori | |
27 | 967f97fa | aliguori | /* from Linux's linux/virtio_config.h */
|
28 | 967f97fa | aliguori | |
29 | 967f97fa | aliguori | /* Status byte for guest to report progress, and synchronize features. */
|
30 | 967f97fa | aliguori | /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
|
31 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
32 | 967f97fa | aliguori | /* We have found a driver for the device. */
|
33 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_DRIVER 2 |
34 | 967f97fa | aliguori | /* Driver has used its parts of the config, and is happy */
|
35 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_DRIVER_OK 4 |
36 | 967f97fa | aliguori | /* We've given up on this device. */
|
37 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_FAILED 0x80 |
38 | 967f97fa | aliguori | |
39 | 6d74ca5a | Michael S. Tsirkin | /* Some virtio feature bits (currently bits 28 through 31) are reserved for the
|
40 | 6d74ca5a | Michael S. Tsirkin | * transport being used (eg. virtio_ring), the rest are per-device feature bits. */
|
41 | 6d74ca5a | Michael S. Tsirkin | #define VIRTIO_TRANSPORT_F_START 28 |
42 | 6d74ca5a | Michael S. Tsirkin | #define VIRTIO_TRANSPORT_F_END 32 |
43 | 6d74ca5a | Michael S. Tsirkin | |
44 | d89c682f | Stefan Weil | /* We notify when the ring is completely used, even if the guest is suppressing
|
45 | 967f97fa | aliguori | * callbacks */
|
46 | 967f97fa | aliguori | #define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
47 | efeea6d0 | Mark McLoughlin | /* We support indirect buffer descriptors */
|
48 | efeea6d0 | Mark McLoughlin | #define VIRTIO_RING_F_INDIRECT_DESC 28 |
49 | bcbabae8 | Michael S. Tsirkin | /* The Guest publishes the used index for which it expects an interrupt
|
50 | bcbabae8 | Michael S. Tsirkin | * at the end of the avail ring. Host should ignore the avail->flags field. */
|
51 | bcbabae8 | Michael S. Tsirkin | /* The Host publishes the avail index for which it expects a kick
|
52 | bcbabae8 | Michael S. Tsirkin | * at the end of the used ring. Guest should ignore the used->flags field. */
|
53 | bcbabae8 | Michael S. Tsirkin | #define VIRTIO_RING_F_EVENT_IDX 29 |
54 | 8eca6b1b | aliguori | /* A guest should never accept this. It implies negotiation is broken. */
|
55 | 8eca6b1b | aliguori | #define VIRTIO_F_BAD_FEATURE 30 |
56 | 967f97fa | aliguori | |
57 | 967f97fa | aliguori | /* from Linux's linux/virtio_ring.h */
|
58 | 967f97fa | aliguori | |
59 | 967f97fa | aliguori | /* This marks a buffer as continuing via the next field. */
|
60 | 967f97fa | aliguori | #define VRING_DESC_F_NEXT 1 |
61 | 967f97fa | aliguori | /* This marks a buffer as write-only (otherwise read-only). */
|
62 | 967f97fa | aliguori | #define VRING_DESC_F_WRITE 2 |
63 | efeea6d0 | Mark McLoughlin | /* This means the buffer contains a list of buffer descriptors. */
|
64 | efeea6d0 | Mark McLoughlin | #define VRING_DESC_F_INDIRECT 4 |
65 | 967f97fa | aliguori | |
66 | 967f97fa | aliguori | /* This means don't notify other side when buffer added. */
|
67 | 967f97fa | aliguori | #define VRING_USED_F_NO_NOTIFY 1 |
68 | 967f97fa | aliguori | /* This means don't interrupt guest when buffer consumed. */
|
69 | 967f97fa | aliguori | #define VRING_AVAIL_F_NO_INTERRUPT 1 |
70 | 967f97fa | aliguori | |
71 | 967f97fa | aliguori | struct VirtQueue;
|
72 | 967f97fa | aliguori | |
73 | c227f099 | Anthony Liguori | static inline target_phys_addr_t vring_align(target_phys_addr_t addr, |
74 | f46f15bc | aliguori | unsigned long align) |
75 | f46f15bc | aliguori | { |
76 | f46f15bc | aliguori | return (addr + align - 1) & ~(align - 1); |
77 | f46f15bc | aliguori | } |
78 | f46f15bc | aliguori | |
79 | 967f97fa | aliguori | typedef struct VirtQueue VirtQueue; |
80 | 967f97fa | aliguori | |
81 | 967f97fa | aliguori | #define VIRTQUEUE_MAX_SIZE 1024 |
82 | 967f97fa | aliguori | |
83 | 967f97fa | aliguori | typedef struct VirtQueueElement |
84 | 967f97fa | aliguori | { |
85 | 967f97fa | aliguori | unsigned int index; |
86 | 967f97fa | aliguori | unsigned int out_num; |
87 | 967f97fa | aliguori | unsigned int in_num; |
88 | c227f099 | Anthony Liguori | target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE]; |
89 | 42fb2e07 | Kevin Wolf | target_phys_addr_t out_addr[VIRTQUEUE_MAX_SIZE]; |
90 | 967f97fa | aliguori | struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
|
91 | 967f97fa | aliguori | struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
|
92 | 967f97fa | aliguori | } VirtQueueElement; |
93 | 967f97fa | aliguori | |
94 | 53c25cea | Paul Brook | typedef struct { |
95 | 7055e687 | Michael S. Tsirkin | void (*notify)(void * opaque, uint16_t vector); |
96 | ff24bd58 | Michael S. Tsirkin | void (*save_config)(void * opaque, QEMUFile *f); |
97 | ff24bd58 | Michael S. Tsirkin | void (*save_queue)(void * opaque, int n, QEMUFile *f); |
98 | ff24bd58 | Michael S. Tsirkin | int (*load_config)(void * opaque, QEMUFile *f); |
99 | ff24bd58 | Michael S. Tsirkin | int (*load_queue)(void * opaque, int n, QEMUFile *f); |
100 | 89c473fd | Michael S. Tsirkin | int (*load_done)(void * opaque, QEMUFile *f); |
101 | 6d74ca5a | Michael S. Tsirkin | unsigned (*get_features)(void * opaque); |
102 | 5430a28f | mst@redhat.com | bool (*query_guest_notifiers)(void * opaque); |
103 | 54dd9321 | Michael S. Tsirkin | int (*set_guest_notifiers)(void * opaque, bool assigned); |
104 | 1cbdabe2 | Michael S. Tsirkin | int (*set_host_notifier)(void * opaque, int n, bool assigned); |
105 | 85cf2a8d | Michael S. Tsirkin | void (*vmstate_change)(void * opaque, bool running); |
106 | 53c25cea | Paul Brook | } VirtIOBindings; |
107 | 53c25cea | Paul Brook | |
108 | bb61564c | Amit Shah | #define VIRTIO_PCI_QUEUE_MAX 64 |
109 | 967f97fa | aliguori | |
110 | 7055e687 | Michael S. Tsirkin | #define VIRTIO_NO_VECTOR 0xffff |
111 | 7055e687 | Michael S. Tsirkin | |
112 | 967f97fa | aliguori | struct VirtIODevice
|
113 | 967f97fa | aliguori | { |
114 | 967f97fa | aliguori | const char *name; |
115 | 967f97fa | aliguori | uint8_t status; |
116 | 967f97fa | aliguori | uint8_t isr; |
117 | 967f97fa | aliguori | uint16_t queue_sel; |
118 | 704a76fc | Michael S. Tsirkin | uint32_t guest_features; |
119 | 967f97fa | aliguori | size_t config_len; |
120 | 967f97fa | aliguori | void *config;
|
121 | 7055e687 | Michael S. Tsirkin | uint16_t config_vector; |
122 | 7055e687 | Michael S. Tsirkin | int nvectors;
|
123 | 8172539d | Michael S. Tsirkin | uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features); |
124 | 8eca6b1b | aliguori | uint32_t (*bad_features)(VirtIODevice *vdev); |
125 | 967f97fa | aliguori | void (*set_features)(VirtIODevice *vdev, uint32_t val);
|
126 | 967f97fa | aliguori | void (*get_config)(VirtIODevice *vdev, uint8_t *config);
|
127 | 967f97fa | aliguori | void (*set_config)(VirtIODevice *vdev, const uint8_t *config); |
128 | 967f97fa | aliguori | void (*reset)(VirtIODevice *vdev);
|
129 | 3e607cb5 | Michael S. Tsirkin | void (*set_status)(VirtIODevice *vdev, uint8_t val);
|
130 | 967f97fa | aliguori | VirtQueue *vq; |
131 | 53c25cea | Paul Brook | const VirtIOBindings *binding;
|
132 | 53c25cea | Paul Brook | void *binding_opaque;
|
133 | 53c25cea | Paul Brook | uint16_t device_id; |
134 | 85cf2a8d | Michael S. Tsirkin | bool vm_running;
|
135 | 85cf2a8d | Michael S. Tsirkin | VMChangeStateEntry *vmstate; |
136 | 967f97fa | aliguori | }; |
137 | 967f97fa | aliguori | |
138 | 967f97fa | aliguori | VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
|
139 | 967f97fa | aliguori | void (*handle_output)(VirtIODevice *,
|
140 | 967f97fa | aliguori | VirtQueue *)); |
141 | 967f97fa | aliguori | |
142 | 967f97fa | aliguori | void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, |
143 | 967f97fa | aliguori | unsigned int len); |
144 | 967f97fa | aliguori | void virtqueue_flush(VirtQueue *vq, unsigned int count); |
145 | 967f97fa | aliguori | void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, |
146 | 967f97fa | aliguori | unsigned int len, unsigned int idx); |
147 | 967f97fa | aliguori | |
148 | 42fb2e07 | Kevin Wolf | void virtqueue_map_sg(struct iovec *sg, target_phys_addr_t *addr, |
149 | 42fb2e07 | Kevin Wolf | size_t num_sg, int is_write);
|
150 | 967f97fa | aliguori | int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
|
151 | 967f97fa | aliguori | int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes); |
152 | 967f97fa | aliguori | |
153 | 967f97fa | aliguori | void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
|
154 | 967f97fa | aliguori | |
155 | 967f97fa | aliguori | void virtio_save(VirtIODevice *vdev, QEMUFile *f);
|
156 | 967f97fa | aliguori | |
157 | 7055e687 | Michael S. Tsirkin | int virtio_load(VirtIODevice *vdev, QEMUFile *f);
|
158 | 967f97fa | aliguori | |
159 | b946a153 | aliguori | void virtio_cleanup(VirtIODevice *vdev);
|
160 | b946a153 | aliguori | |
161 | 967f97fa | aliguori | void virtio_notify_config(VirtIODevice *vdev);
|
162 | 967f97fa | aliguori | |
163 | 967f97fa | aliguori | void virtio_queue_set_notification(VirtQueue *vq, int enable); |
164 | 967f97fa | aliguori | |
165 | 967f97fa | aliguori | int virtio_queue_ready(VirtQueue *vq);
|
166 | 967f97fa | aliguori | |
167 | 967f97fa | aliguori | int virtio_queue_empty(VirtQueue *vq);
|
168 | 967f97fa | aliguori | |
169 | 53c25cea | Paul Brook | /* Host binding interface. */
|
170 | 53c25cea | Paul Brook | |
171 | 53c25cea | Paul Brook | VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, |
172 | 53c25cea | Paul Brook | size_t config_size, size_t struct_size); |
173 | 53c25cea | Paul Brook | uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |
174 | 53c25cea | Paul Brook | uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); |
175 | 53c25cea | Paul Brook | uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); |
176 | 53c25cea | Paul Brook | void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
177 | 53c25cea | Paul Brook | void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
178 | 53c25cea | Paul Brook | void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
|
179 | c227f099 | Anthony Liguori | void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr); |
180 | c227f099 | Anthony Liguori | target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
|
181 | 53c25cea | Paul Brook | int virtio_queue_get_num(VirtIODevice *vdev, int n); |
182 | 53c25cea | Paul Brook | void virtio_queue_notify(VirtIODevice *vdev, int n); |
183 | 7055e687 | Michael S. Tsirkin | uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
|
184 | 7055e687 | Michael S. Tsirkin | void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); |
185 | 4e1837f8 | Stefan Hajnoczi | void virtio_set_status(VirtIODevice *vdev, uint8_t val);
|
186 | 53c25cea | Paul Brook | void virtio_reset(void *opaque); |
187 | 53c25cea | Paul Brook | void virtio_update_irq(VirtIODevice *vdev);
|
188 | 53c25cea | Paul Brook | |
189 | 53c25cea | Paul Brook | void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, |
190 | 53c25cea | Paul Brook | void *opaque);
|
191 | 53c25cea | Paul Brook | |
192 | 53c25cea | Paul Brook | /* Base devices. */
|
193 | a8686a9b | Markus Armbruster | VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf, |
194 | a8686a9b | Markus Armbruster | char **serial);
|
195 | f0c07c7c | Alex Williamson | struct virtio_net_conf;
|
196 | f0c07c7c | Alex Williamson | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf, |
197 | f0c07c7c | Alex Williamson | struct virtio_net_conf *net);
|
198 | 6b331efb | Amit Shah | typedef struct virtio_serial_conf virtio_serial_conf; |
199 | 6b331efb | Amit Shah | VirtIODevice *virtio_serial_init(DeviceState *dev, virtio_serial_conf *serial); |
200 | 53c25cea | Paul Brook | VirtIODevice *virtio_balloon_init(DeviceState *dev); |
201 | 9f107513 | Anthony Liguori | #ifdef CONFIG_LINUX
|
202 | 9f107513 | Anthony Liguori | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf); |
203 | 9f107513 | Anthony Liguori | #endif
|
204 | 9f107513 | Anthony Liguori | |
205 | 53c25cea | Paul Brook | |
206 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev);
|
207 | 9d0d3138 | Alex Williamson | void virtio_blk_exit(VirtIODevice *vdev);
|
208 | 8b53a865 | Amit Shah | void virtio_serial_exit(VirtIODevice *vdev);
|
209 | 855d7e25 | Amit Shah | void virtio_balloon_exit(VirtIODevice *vdev);
|
210 | 97b15621 | Gerd Hoffmann | |
211 | 8172539d | Michael S. Tsirkin | #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
|
212 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("indirect_desc", _state, _field, \
|
213 | bcbabae8 | Michael S. Tsirkin | VIRTIO_RING_F_INDIRECT_DESC, true), \
|
214 | bcbabae8 | Michael S. Tsirkin | DEFINE_PROP_BIT("event_idx", _state, _field, \
|
215 | bcbabae8 | Michael S. Tsirkin | VIRTIO_RING_F_EVENT_IDX, true)
|
216 | 8172539d | Michael S. Tsirkin | |
217 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
|
218 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
|
219 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
|
220 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
|
221 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
|
222 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
|
223 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_used_size(VirtIODevice *vdev, int n);
|
224 | 1cbdabe2 | Michael S. Tsirkin | target_phys_addr_t virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
|
225 | 1cbdabe2 | Michael S. Tsirkin | uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
|
226 | 1cbdabe2 | Michael S. Tsirkin | void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); |
227 | 1cbdabe2 | Michael S. Tsirkin | VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
|
228 | 1cbdabe2 | Michael S. Tsirkin | EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); |
229 | 1cbdabe2 | Michael S. Tsirkin | EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq); |
230 | 25db9ebe | Stefan Hajnoczi | void virtio_queue_notify_vq(VirtQueue *vq);
|
231 | 1cbdabe2 | Michael S. Tsirkin | void virtio_irq(VirtQueue *vq);
|
232 | 967f97fa | aliguori | #endif |