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