]>
Commit | Line | Data |
---|---|---|
967f97fa AL |
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 | ||
967f97fa | 17 | #include "hw.h" |
53c25cea | 18 | #include "qdev.h" |
967f97fa AL |
19 | |
20 | /* from Linux's linux/virtio_config.h */ | |
21 | ||
22 | /* Status byte for guest to report progress, and synchronize features. */ | |
23 | /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ | |
24 | #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 | |
25 | /* We have found a driver for the device. */ | |
26 | #define VIRTIO_CONFIG_S_DRIVER 2 | |
27 | /* Driver has used its parts of the config, and is happy */ | |
28 | #define VIRTIO_CONFIG_S_DRIVER_OK 4 | |
29 | /* We've given up on this device. */ | |
30 | #define VIRTIO_CONFIG_S_FAILED 0x80 | |
31 | ||
32 | /* We notify when the ring is completely used, even if the guest is supressing | |
33 | * callbacks */ | |
34 | #define VIRTIO_F_NOTIFY_ON_EMPTY 24 | |
8eca6b1b AL |
35 | /* A guest should never accept this. It implies negotiation is broken. */ |
36 | #define VIRTIO_F_BAD_FEATURE 30 | |
967f97fa AL |
37 | |
38 | /* from Linux's linux/virtio_ring.h */ | |
39 | ||
40 | /* This marks a buffer as continuing via the next field. */ | |
41 | #define VRING_DESC_F_NEXT 1 | |
42 | /* This marks a buffer as write-only (otherwise read-only). */ | |
43 | #define VRING_DESC_F_WRITE 2 | |
44 | ||
45 | /* This means don't notify other side when buffer added. */ | |
46 | #define VRING_USED_F_NO_NOTIFY 1 | |
47 | /* This means don't interrupt guest when buffer consumed. */ | |
48 | #define VRING_AVAIL_F_NO_INTERRUPT 1 | |
49 | ||
50 | struct VirtQueue; | |
51 | ||
f46f15bc AL |
52 | static inline target_phys_addr_t vring_align(target_phys_addr_t addr, |
53 | unsigned long align) | |
54 | { | |
55 | return (addr + align - 1) & ~(align - 1); | |
56 | } | |
57 | ||
967f97fa AL |
58 | typedef struct VirtQueue VirtQueue; |
59 | typedef struct VirtIODevice VirtIODevice; | |
60 | ||
61 | #define VIRTQUEUE_MAX_SIZE 1024 | |
62 | ||
63 | typedef struct VirtQueueElement | |
64 | { | |
65 | unsigned int index; | |
66 | unsigned int out_num; | |
67 | unsigned int in_num; | |
68 | target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE]; | |
69 | struct iovec in_sg[VIRTQUEUE_MAX_SIZE]; | |
70 | struct iovec out_sg[VIRTQUEUE_MAX_SIZE]; | |
71 | } VirtQueueElement; | |
72 | ||
53c25cea PB |
73 | typedef struct { |
74 | void (*update_irq)(void * opaque); | |
75 | } VirtIOBindings; | |
76 | ||
967f97fa AL |
77 | #define VIRTIO_PCI_QUEUE_MAX 16 |
78 | ||
79 | struct VirtIODevice | |
80 | { | |
967f97fa | 81 | const char *name; |
967f97fa AL |
82 | uint8_t status; |
83 | uint8_t isr; | |
84 | uint16_t queue_sel; | |
85 | uint32_t features; | |
86 | size_t config_len; | |
87 | void *config; | |
88 | uint32_t (*get_features)(VirtIODevice *vdev); | |
8eca6b1b | 89 | uint32_t (*bad_features)(VirtIODevice *vdev); |
967f97fa AL |
90 | void (*set_features)(VirtIODevice *vdev, uint32_t val); |
91 | void (*get_config)(VirtIODevice *vdev, uint8_t *config); | |
92 | void (*set_config)(VirtIODevice *vdev, const uint8_t *config); | |
93 | void (*reset)(VirtIODevice *vdev); | |
94 | VirtQueue *vq; | |
53c25cea PB |
95 | const VirtIOBindings *binding; |
96 | void *binding_opaque; | |
97 | uint16_t device_id; | |
967f97fa AL |
98 | }; |
99 | ||
967f97fa AL |
100 | VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, |
101 | void (*handle_output)(VirtIODevice *, | |
102 | VirtQueue *)); | |
103 | ||
104 | void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, | |
105 | unsigned int len); | |
106 | void virtqueue_flush(VirtQueue *vq, unsigned int count); | |
107 | void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem, | |
108 | unsigned int len, unsigned int idx); | |
109 | ||
110 | int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem); | |
111 | int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes); | |
112 | ||
113 | void virtio_notify(VirtIODevice *vdev, VirtQueue *vq); | |
114 | ||
115 | void virtio_save(VirtIODevice *vdev, QEMUFile *f); | |
116 | ||
117 | void virtio_load(VirtIODevice *vdev, QEMUFile *f); | |
118 | ||
b946a153 AL |
119 | void virtio_cleanup(VirtIODevice *vdev); |
120 | ||
967f97fa AL |
121 | void virtio_notify_config(VirtIODevice *vdev); |
122 | ||
123 | void virtio_queue_set_notification(VirtQueue *vq, int enable); | |
124 | ||
125 | int virtio_queue_ready(VirtQueue *vq); | |
126 | ||
127 | int virtio_queue_empty(VirtQueue *vq); | |
128 | ||
53c25cea PB |
129 | /* Host binding interface. */ |
130 | ||
131 | VirtIODevice *virtio_common_init(const char *name, uint16_t device_id, | |
132 | size_t config_size, size_t struct_size); | |
133 | uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr); | |
134 | uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr); | |
135 | uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr); | |
136 | void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
137 | void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
138 | void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data); | |
139 | void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr); | |
140 | target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n); | |
141 | int virtio_queue_get_num(VirtIODevice *vdev, int n); | |
142 | void virtio_queue_notify(VirtIODevice *vdev, int n); | |
143 | void virtio_reset(void *opaque); | |
144 | void virtio_update_irq(VirtIODevice *vdev); | |
145 | ||
146 | void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding, | |
147 | void *opaque); | |
148 | ||
149 | /* Base devices. */ | |
150 | VirtIODevice *virtio_blk_init(DeviceState *dev); | |
151 | VirtIODevice *virtio_net_init(DeviceState *dev); | |
152 | VirtIODevice *virtio_console_init(DeviceState *dev); | |
153 | VirtIODevice *virtio_balloon_init(DeviceState *dev); | |
154 | ||
967f97fa | 155 | #endif |