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1.1 root 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"
1.1.1.4 ! root 18: #include "qdev.h"
1.1 root 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
1.1.1.4 ! root 35: /* We support indirect buffer descriptors */
! 36: #define VIRTIO_RING_F_INDIRECT_DESC 28
1.1.1.2 root 37: /* A guest should never accept this. It implies negotiation is broken. */
38: #define VIRTIO_F_BAD_FEATURE 30
1.1 root 39:
40: /* from Linux's linux/virtio_ring.h */
41:
42: /* This marks a buffer as continuing via the next field. */
43: #define VRING_DESC_F_NEXT 1
44: /* This marks a buffer as write-only (otherwise read-only). */
45: #define VRING_DESC_F_WRITE 2
1.1.1.4 ! root 46: /* This means the buffer contains a list of buffer descriptors. */
! 47: #define VRING_DESC_F_INDIRECT 4
1.1 root 48:
49: /* This means don't notify other side when buffer added. */
50: #define VRING_USED_F_NO_NOTIFY 1
51: /* This means don't interrupt guest when buffer consumed. */
52: #define VRING_AVAIL_F_NO_INTERRUPT 1
53:
54: struct VirtQueue;
55:
56: static inline target_phys_addr_t vring_align(target_phys_addr_t addr,
57: unsigned long align)
58: {
59: return (addr + align - 1) & ~(align - 1);
60: }
61:
62: typedef struct VirtQueue VirtQueue;
63: typedef struct VirtIODevice VirtIODevice;
64:
65: #define VIRTQUEUE_MAX_SIZE 1024
66:
67: typedef struct VirtQueueElement
68: {
69: unsigned int index;
70: unsigned int out_num;
71: unsigned int in_num;
72: target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE];
73: struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
74: struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
75: } VirtQueueElement;
76:
1.1.1.4 ! root 77: typedef struct {
! 78: void (*notify)(void * opaque, uint16_t vector);
! 79: void (*save_config)(void * opaque, QEMUFile *f);
! 80: void (*save_queue)(void * opaque, int n, QEMUFile *f);
! 81: int (*load_config)(void * opaque, QEMUFile *f);
! 82: int (*load_queue)(void * opaque, int n, QEMUFile *f);
! 83: } VirtIOBindings;
! 84:
1.1 root 85: #define VIRTIO_PCI_QUEUE_MAX 16
86:
1.1.1.4 ! root 87: #define VIRTIO_NO_VECTOR 0xffff
! 88:
1.1 root 89: struct VirtIODevice
90: {
91: const char *name;
92: uint8_t status;
93: uint8_t isr;
94: uint16_t queue_sel;
95: uint32_t features;
96: size_t config_len;
97: void *config;
1.1.1.4 ! root 98: uint16_t config_vector;
! 99: int nvectors;
1.1 root 100: uint32_t (*get_features)(VirtIODevice *vdev);
1.1.1.2 root 101: uint32_t (*bad_features)(VirtIODevice *vdev);
1.1 root 102: void (*set_features)(VirtIODevice *vdev, uint32_t val);
103: void (*get_config)(VirtIODevice *vdev, uint8_t *config);
104: void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
105: void (*reset)(VirtIODevice *vdev);
106: VirtQueue *vq;
1.1.1.4 ! root 107: const VirtIOBindings *binding;
! 108: void *binding_opaque;
! 109: uint16_t device_id;
1.1 root 110: };
111:
112: VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
113: void (*handle_output)(VirtIODevice *,
114: VirtQueue *));
115:
116: void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
117: unsigned int len);
118: void virtqueue_flush(VirtQueue *vq, unsigned int count);
119: void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
120: unsigned int len, unsigned int idx);
121:
122: int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
123: int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);
124:
125: void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
126:
127: void virtio_save(VirtIODevice *vdev, QEMUFile *f);
128:
1.1.1.4 ! root 129: int virtio_load(VirtIODevice *vdev, QEMUFile *f);
1.1 root 130:
1.1.1.3 root 131: void virtio_cleanup(VirtIODevice *vdev);
132:
1.1 root 133: void virtio_notify_config(VirtIODevice *vdev);
134:
135: void virtio_queue_set_notification(VirtQueue *vq, int enable);
136:
137: int virtio_queue_ready(VirtQueue *vq);
138:
139: int virtio_queue_empty(VirtQueue *vq);
140:
1.1.1.4 ! root 141: /* Host binding interface. */
! 142:
! 143: VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
! 144: size_t config_size, size_t struct_size);
! 145: uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
! 146: uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
! 147: uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
! 148: void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
! 149: void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
! 150: void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
! 151: void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr);
! 152: target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
! 153: int virtio_queue_get_num(VirtIODevice *vdev, int n);
! 154: void virtio_queue_notify(VirtIODevice *vdev, int n);
! 155: uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
! 156: void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
! 157: void virtio_reset(void *opaque);
! 158: void virtio_update_irq(VirtIODevice *vdev);
! 159:
! 160: void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding,
! 161: void *opaque);
! 162:
! 163: /* Base devices. */
! 164: VirtIODevice *virtio_blk_init(DeviceState *dev);
! 165: VirtIODevice *virtio_net_init(DeviceState *dev);
! 166: VirtIODevice *virtio_console_init(DeviceState *dev);
! 167: VirtIODevice *virtio_balloon_init(DeviceState *dev);
! 168:
1.1 root 169: #endif
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