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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"
1.1.1.5 ! root 18: #include "net.h"
1.1.1.4 root 19: #include "qdev.h"
1.1.1.5 ! root 20: #include "sysemu.h"
1.1 root 21:
22: /* from Linux's linux/virtio_config.h */
23:
24: /* Status byte for guest to report progress, and synchronize features. */
25: /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
26: #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
27: /* We have found a driver for the device. */
28: #define VIRTIO_CONFIG_S_DRIVER 2
29: /* Driver has used its parts of the config, and is happy */
30: #define VIRTIO_CONFIG_S_DRIVER_OK 4
31: /* We've given up on this device. */
32: #define VIRTIO_CONFIG_S_FAILED 0x80
33:
1.1.1.5 ! root 34: /* Some virtio feature bits (currently bits 28 through 31) are reserved for the
! 35: * transport being used (eg. virtio_ring), the rest are per-device feature bits. */
! 36: #define VIRTIO_TRANSPORT_F_START 28
! 37: #define VIRTIO_TRANSPORT_F_END 32
! 38:
! 39: /* We notify when the ring is completely used, even if the guest is suppressing
1.1 root 40: * callbacks */
41: #define VIRTIO_F_NOTIFY_ON_EMPTY 24
1.1.1.4 root 42: /* We support indirect buffer descriptors */
43: #define VIRTIO_RING_F_INDIRECT_DESC 28
1.1.1.2 root 44: /* A guest should never accept this. It implies negotiation is broken. */
45: #define VIRTIO_F_BAD_FEATURE 30
1.1 root 46:
47: /* from Linux's linux/virtio_ring.h */
48:
49: /* This marks a buffer as continuing via the next field. */
50: #define VRING_DESC_F_NEXT 1
51: /* This marks a buffer as write-only (otherwise read-only). */
52: #define VRING_DESC_F_WRITE 2
1.1.1.4 root 53: /* This means the buffer contains a list of buffer descriptors. */
54: #define VRING_DESC_F_INDIRECT 4
1.1 root 55:
56: /* This means don't notify other side when buffer added. */
57: #define VRING_USED_F_NO_NOTIFY 1
58: /* This means don't interrupt guest when buffer consumed. */
59: #define VRING_AVAIL_F_NO_INTERRUPT 1
60:
61: struct VirtQueue;
62:
63: static inline target_phys_addr_t vring_align(target_phys_addr_t addr,
64: unsigned long align)
65: {
66: return (addr + align - 1) & ~(align - 1);
67: }
68:
69: typedef struct VirtQueue VirtQueue;
70: typedef struct VirtIODevice VirtIODevice;
71:
72: #define VIRTQUEUE_MAX_SIZE 1024
73:
74: typedef struct VirtQueueElement
75: {
76: unsigned int index;
77: unsigned int out_num;
78: unsigned int in_num;
79: target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE];
80: struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
81: struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
82: } VirtQueueElement;
83:
1.1.1.4 root 84: typedef struct {
85: void (*notify)(void * opaque, uint16_t vector);
86: void (*save_config)(void * opaque, QEMUFile *f);
87: void (*save_queue)(void * opaque, int n, QEMUFile *f);
88: int (*load_config)(void * opaque, QEMUFile *f);
89: int (*load_queue)(void * opaque, int n, QEMUFile *f);
1.1.1.5 ! root 90: unsigned (*get_features)(void * opaque);
1.1.1.4 root 91: } VirtIOBindings;
92:
1.1 root 93: #define VIRTIO_PCI_QUEUE_MAX 16
94:
1.1.1.4 root 95: #define VIRTIO_NO_VECTOR 0xffff
96:
1.1 root 97: struct VirtIODevice
98: {
99: const char *name;
100: uint8_t status;
101: uint8_t isr;
102: uint16_t queue_sel;
103: uint32_t features;
104: size_t config_len;
105: void *config;
1.1.1.4 root 106: uint16_t config_vector;
107: int nvectors;
1.1 root 108: uint32_t (*get_features)(VirtIODevice *vdev);
1.1.1.2 root 109: uint32_t (*bad_features)(VirtIODevice *vdev);
1.1 root 110: void (*set_features)(VirtIODevice *vdev, uint32_t val);
111: void (*get_config)(VirtIODevice *vdev, uint8_t *config);
112: void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
113: void (*reset)(VirtIODevice *vdev);
114: VirtQueue *vq;
1.1.1.4 root 115: const VirtIOBindings *binding;
116: void *binding_opaque;
117: uint16_t device_id;
1.1 root 118: };
119:
120: VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
121: void (*handle_output)(VirtIODevice *,
122: VirtQueue *));
123:
124: void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
125: unsigned int len);
126: void virtqueue_flush(VirtQueue *vq, unsigned int count);
127: void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
128: unsigned int len, unsigned int idx);
129:
130: int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
131: int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);
132:
133: void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
134:
135: void virtio_save(VirtIODevice *vdev, QEMUFile *f);
136:
1.1.1.4 root 137: int virtio_load(VirtIODevice *vdev, QEMUFile *f);
1.1 root 138:
1.1.1.3 root 139: void virtio_cleanup(VirtIODevice *vdev);
140:
1.1 root 141: void virtio_notify_config(VirtIODevice *vdev);
142:
143: void virtio_queue_set_notification(VirtQueue *vq, int enable);
144:
145: int virtio_queue_ready(VirtQueue *vq);
146:
147: int virtio_queue_empty(VirtQueue *vq);
148:
1.1.1.4 root 149: /* Host binding interface. */
150:
151: VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
152: size_t config_size, size_t struct_size);
153: uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
154: uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
155: uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
156: void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
157: void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
158: void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
159: void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr);
160: target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
161: int virtio_queue_get_num(VirtIODevice *vdev, int n);
162: void virtio_queue_notify(VirtIODevice *vdev, int n);
163: uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
164: void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
165: void virtio_reset(void *opaque);
166: void virtio_update_irq(VirtIODevice *vdev);
167:
168: void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding,
169: void *opaque);
170:
171: /* Base devices. */
1.1.1.5 ! root 172: VirtIODevice *virtio_blk_init(DeviceState *dev, DriveInfo *dinfo);
! 173: VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf);
1.1.1.4 root 174: VirtIODevice *virtio_console_init(DeviceState *dev);
175: VirtIODevice *virtio_balloon_init(DeviceState *dev);
176:
1.1.1.5 ! root 177: void virtio_net_exit(VirtIODevice *vdev);
! 178:
1.1 root 179: #endif
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