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1 | 967f97fa | aliguori | /*
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2 | 967f97fa | aliguori | * Virtio Support
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3 | 967f97fa | aliguori | *
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4 | 967f97fa | aliguori | * Copyright IBM, Corp. 2007
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5 | 967f97fa | aliguori | *
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6 | 967f97fa | aliguori | * Authors:
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7 | 967f97fa | aliguori | * Anthony Liguori <aliguori@us.ibm.com>
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8 | 967f97fa | aliguori | *
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9 | 967f97fa | aliguori | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | 967f97fa | aliguori | * the COPYING file in the top-level directory.
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11 | 967f97fa | aliguori | *
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12 | 967f97fa | aliguori | */
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13 | 967f97fa | aliguori | |
14 | 967f97fa | aliguori | #ifndef _QEMU_VIRTIO_H
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15 | 967f97fa | aliguori | #define _QEMU_VIRTIO_H
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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 | 428c149b | Christoph Hellwig | #include "block_int.h" |
22 | 967f97fa | aliguori | |
23 | 967f97fa | aliguori | /* from Linux's linux/virtio_config.h */
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24 | 967f97fa | aliguori | |
25 | 967f97fa | aliguori | /* Status byte for guest to report progress, and synchronize features. */
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26 | 967f97fa | aliguori | /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
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27 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
28 | 967f97fa | aliguori | /* We have found a driver for the device. */
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29 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_DRIVER 2 |
30 | 967f97fa | aliguori | /* Driver has used its parts of the config, and is happy */
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31 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_DRIVER_OK 4 |
32 | 967f97fa | aliguori | /* We've given up on this device. */
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33 | 967f97fa | aliguori | #define VIRTIO_CONFIG_S_FAILED 0x80 |
34 | 967f97fa | aliguori | |
35 | 6d74ca5a | Michael S. Tsirkin | /* Some virtio feature bits (currently bits 28 through 31) are reserved for the
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36 | 6d74ca5a | Michael S. Tsirkin | * transport being used (eg. virtio_ring), the rest are per-device feature bits. */
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37 | 6d74ca5a | Michael S. Tsirkin | #define VIRTIO_TRANSPORT_F_START 28 |
38 | 6d74ca5a | Michael S. Tsirkin | #define VIRTIO_TRANSPORT_F_END 32 |
39 | 6d74ca5a | Michael S. Tsirkin | |
40 | d89c682f | Stefan Weil | /* We notify when the ring is completely used, even if the guest is suppressing
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41 | 967f97fa | aliguori | * callbacks */
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42 | 967f97fa | aliguori | #define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
43 | efeea6d0 | Mark McLoughlin | /* We support indirect buffer descriptors */
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44 | efeea6d0 | Mark McLoughlin | #define VIRTIO_RING_F_INDIRECT_DESC 28 |
45 | 8eca6b1b | aliguori | /* A guest should never accept this. It implies negotiation is broken. */
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46 | 8eca6b1b | aliguori | #define VIRTIO_F_BAD_FEATURE 30 |
47 | 967f97fa | aliguori | |
48 | 967f97fa | aliguori | /* from Linux's linux/virtio_ring.h */
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49 | 967f97fa | aliguori | |
50 | 967f97fa | aliguori | /* This marks a buffer as continuing via the next field. */
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51 | 967f97fa | aliguori | #define VRING_DESC_F_NEXT 1 |
52 | 967f97fa | aliguori | /* This marks a buffer as write-only (otherwise read-only). */
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53 | 967f97fa | aliguori | #define VRING_DESC_F_WRITE 2 |
54 | efeea6d0 | Mark McLoughlin | /* This means the buffer contains a list of buffer descriptors. */
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55 | efeea6d0 | Mark McLoughlin | #define VRING_DESC_F_INDIRECT 4 |
56 | 967f97fa | aliguori | |
57 | 967f97fa | aliguori | /* This means don't notify other side when buffer added. */
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58 | 967f97fa | aliguori | #define VRING_USED_F_NO_NOTIFY 1 |
59 | 967f97fa | aliguori | /* This means don't interrupt guest when buffer consumed. */
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60 | 967f97fa | aliguori | #define VRING_AVAIL_F_NO_INTERRUPT 1 |
61 | 967f97fa | aliguori | |
62 | 967f97fa | aliguori | struct VirtQueue;
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63 | 967f97fa | aliguori | |
64 | c227f099 | Anthony Liguori | static inline target_phys_addr_t vring_align(target_phys_addr_t addr, |
65 | f46f15bc | aliguori | unsigned long align) |
66 | f46f15bc | aliguori | { |
67 | f46f15bc | aliguori | return (addr + align - 1) & ~(align - 1); |
68 | f46f15bc | aliguori | } |
69 | f46f15bc | aliguori | |
70 | 967f97fa | aliguori | typedef struct VirtQueue VirtQueue; |
71 | 967f97fa | aliguori | typedef struct VirtIODevice VirtIODevice; |
72 | 967f97fa | aliguori | |
73 | 967f97fa | aliguori | #define VIRTQUEUE_MAX_SIZE 1024 |
74 | 967f97fa | aliguori | |
75 | 967f97fa | aliguori | typedef struct VirtQueueElement |
76 | 967f97fa | aliguori | { |
77 | 967f97fa | aliguori | unsigned int index; |
78 | 967f97fa | aliguori | unsigned int out_num; |
79 | 967f97fa | aliguori | unsigned int in_num; |
80 | c227f099 | Anthony Liguori | target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE]; |
81 | 967f97fa | aliguori | struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
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82 | 967f97fa | aliguori | struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
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83 | 967f97fa | aliguori | } VirtQueueElement; |
84 | 967f97fa | aliguori | |
85 | 53c25cea | Paul Brook | typedef struct { |
86 | 7055e687 | Michael S. Tsirkin | void (*notify)(void * opaque, uint16_t vector); |
87 | ff24bd58 | Michael S. Tsirkin | void (*save_config)(void * opaque, QEMUFile *f); |
88 | ff24bd58 | Michael S. Tsirkin | void (*save_queue)(void * opaque, int n, QEMUFile *f); |
89 | ff24bd58 | Michael S. Tsirkin | int (*load_config)(void * opaque, QEMUFile *f); |
90 | ff24bd58 | Michael S. Tsirkin | int (*load_queue)(void * opaque, int n, QEMUFile *f); |
91 | 6d74ca5a | Michael S. Tsirkin | unsigned (*get_features)(void * opaque); |
92 | 53c25cea | Paul Brook | } VirtIOBindings; |
93 | 53c25cea | Paul Brook | |
94 | bb61564c | Amit Shah | #define VIRTIO_PCI_QUEUE_MAX 64 |
95 | 967f97fa | aliguori | |
96 | 7055e687 | Michael S. Tsirkin | #define VIRTIO_NO_VECTOR 0xffff |
97 | 7055e687 | Michael S. Tsirkin | |
98 | 967f97fa | aliguori | struct VirtIODevice
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99 | 967f97fa | aliguori | { |
100 | 967f97fa | aliguori | const char *name; |
101 | 967f97fa | aliguori | uint8_t status; |
102 | 967f97fa | aliguori | uint8_t isr; |
103 | 967f97fa | aliguori | uint16_t queue_sel; |
104 | 704a76fc | Michael S. Tsirkin | uint32_t guest_features; |
105 | 967f97fa | aliguori | size_t config_len; |
106 | 967f97fa | aliguori | void *config;
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107 | 7055e687 | Michael S. Tsirkin | uint16_t config_vector; |
108 | 7055e687 | Michael S. Tsirkin | int nvectors;
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109 | 8172539d | Michael S. Tsirkin | uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features); |
110 | 8eca6b1b | aliguori | uint32_t (*bad_features)(VirtIODevice *vdev); |
111 | 967f97fa | aliguori | void (*set_features)(VirtIODevice *vdev, uint32_t val);
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112 | 967f97fa | aliguori | void (*get_config)(VirtIODevice *vdev, uint8_t *config);
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113 | 967f97fa | aliguori | void (*set_config)(VirtIODevice *vdev, const uint8_t *config); |
114 | 967f97fa | aliguori | void (*reset)(VirtIODevice *vdev);
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115 | 967f97fa | aliguori | VirtQueue *vq; |
116 | 53c25cea | Paul Brook | const VirtIOBindings *binding;
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117 | 53c25cea | Paul Brook | void *binding_opaque;
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118 | 53c25cea | Paul Brook | uint16_t device_id; |
119 | 967f97fa | aliguori | }; |
120 | 967f97fa | aliguori | |
121 | 967f97fa | aliguori | VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
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122 | 967f97fa | aliguori | void (*handle_output)(VirtIODevice *,
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123 | 967f97fa | aliguori | VirtQueue *)); |
124 | 967f97fa | aliguori | |
125 | 967f97fa | aliguori | void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, |
126 | 967f97fa | aliguori | unsigned int len); |
127 | 967f97fa | aliguori | void virtqueue_flush(VirtQueue *vq, unsigned int count); |
128 | 967f97fa | aliguori | void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, |
129 | 967f97fa | aliguori | unsigned int len, unsigned int idx); |
130 | 967f97fa | aliguori | |
131 | 967f97fa | aliguori | int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
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132 | 967f97fa | aliguori | int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes); |
133 | 967f97fa | aliguori | |
134 | 967f97fa | aliguori | void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
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135 | 967f97fa | aliguori | |
136 | 967f97fa | aliguori | void virtio_save(VirtIODevice *vdev, QEMUFile *f);
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137 | 967f97fa | aliguori | |
138 | 7055e687 | Michael S. Tsirkin | int virtio_load(VirtIODevice *vdev, QEMUFile *f);
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139 | 967f97fa | aliguori | |
140 | b946a153 | aliguori | void virtio_cleanup(VirtIODevice *vdev);
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141 | b946a153 | aliguori | |
142 | 967f97fa | aliguori | void virtio_notify_config(VirtIODevice *vdev);
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143 | 967f97fa | aliguori | |
144 | 967f97fa | aliguori | void virtio_queue_set_notification(VirtQueue *vq, int enable); |
145 | 967f97fa | aliguori | |
146 | 967f97fa | aliguori | int virtio_queue_ready(VirtQueue *vq);
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147 | 967f97fa | aliguori | |
148 | 967f97fa | aliguori | int virtio_queue_empty(VirtQueue *vq);
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149 | 967f97fa | aliguori | |
150 | 53c25cea | Paul Brook | /* Host binding interface. */
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151 | 53c25cea | Paul Brook | |
152 | 53c25cea | Paul Brook | VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, |
153 | 53c25cea | Paul Brook | size_t config_size, size_t struct_size); |
154 | 53c25cea | Paul Brook | uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); |
155 | 53c25cea | Paul Brook | uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); |
156 | 53c25cea | Paul Brook | uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); |
157 | 53c25cea | Paul Brook | void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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158 | 53c25cea | Paul Brook | void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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159 | 53c25cea | Paul Brook | void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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160 | c227f099 | Anthony Liguori | void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr); |
161 | c227f099 | Anthony Liguori | target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
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162 | 53c25cea | Paul Brook | int virtio_queue_get_num(VirtIODevice *vdev, int n); |
163 | 53c25cea | Paul Brook | void virtio_queue_notify(VirtIODevice *vdev, int n); |
164 | 7055e687 | Michael S. Tsirkin | uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
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165 | 7055e687 | Michael S. Tsirkin | void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector); |
166 | 53c25cea | Paul Brook | void virtio_reset(void *opaque); |
167 | 53c25cea | Paul Brook | void virtio_update_irq(VirtIODevice *vdev);
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168 | 53c25cea | Paul Brook | |
169 | 53c25cea | Paul Brook | void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, |
170 | 53c25cea | Paul Brook | void *opaque);
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171 | 53c25cea | Paul Brook | |
172 | 53c25cea | Paul Brook | /* Base devices. */
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173 | 428c149b | Christoph Hellwig | VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf); |
174 | 97b15621 | Gerd Hoffmann | VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf); |
175 | 98b19252 | Amit Shah | VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports); |
176 | 53c25cea | Paul Brook | VirtIODevice *virtio_balloon_init(DeviceState *dev); |
177 | 53c25cea | Paul Brook | |
178 | 97b15621 | Gerd Hoffmann | void virtio_net_exit(VirtIODevice *vdev);
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179 | 97b15621 | Gerd Hoffmann | |
180 | 8172539d | Michael S. Tsirkin | #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
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181 | 8172539d | Michael S. Tsirkin | DEFINE_PROP_BIT("indirect_desc", _state, _field, \
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182 | 8172539d | Michael S. Tsirkin | VIRTIO_RING_F_INDIRECT_DESC, true)
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183 | 8172539d | Michael S. Tsirkin | |
184 | 8172539d | Michael S. Tsirkin | |
185 | 967f97fa | aliguori | #endif |