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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"
1.1.1.6 root 21: #include "block_int.h"
22: #include "event_notifier.h"
23: #ifdef CONFIG_LINUX
24: #include "9p.h"
25: #endif
1.1 root 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:
1.1.1.5 root 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
1.1 root 45: * callbacks */
46: #define VIRTIO_F_NOTIFY_ON_EMPTY 24
1.1.1.4 root 47: /* We support indirect buffer descriptors */
48: #define VIRTIO_RING_F_INDIRECT_DESC 28
1.1.1.9 ! root 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
1.1.1.2 root 54: /* A guest should never accept this. It implies negotiation is broken. */
55: #define VIRTIO_F_BAD_FEATURE 30
1.1 root 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
1.1.1.4 root 63: /* This means the buffer contains a list of buffer descriptors. */
64: #define VRING_DESC_F_INDIRECT 4
1.1 root 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:
71: struct VirtQueue;
72:
73: static 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:
79: typedef struct VirtQueue VirtQueue;
80:
81: #define VIRTQUEUE_MAX_SIZE 1024
82:
83: typedef 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];
1.1.1.6 root 89: target_phys_addr_t out_addr[VIRTQUEUE_MAX_SIZE];
1.1 root 90: struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
91: struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
92: } VirtQueueElement;
93:
1.1.1.4 root 94: typedef 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);
1.1.1.8 root 100: int (*load_done)(void * opaque, QEMUFile *f);
1.1.1.5 root 101: unsigned (*get_features)(void * opaque);
1.1.1.7 root 102: bool (*query_guest_notifiers)(void * opaque);
1.1.1.6 root 103: int (*set_guest_notifiers)(void * opaque, bool assigned);
104: int (*set_host_notifier)(void * opaque, int n, bool assigned);
1.1.1.7 root 105: void (*vmstate_change)(void * opaque, bool running);
1.1.1.4 root 106: } VirtIOBindings;
107:
1.1.1.6 root 108: #define VIRTIO_PCI_QUEUE_MAX 64
1.1 root 109:
1.1.1.4 root 110: #define VIRTIO_NO_VECTOR 0xffff
111:
1.1 root 112: struct VirtIODevice
113: {
114: const char *name;
115: uint8_t status;
116: uint8_t isr;
117: uint16_t queue_sel;
1.1.1.6 root 118: uint32_t guest_features;
1.1 root 119: size_t config_len;
120: void *config;
1.1.1.4 root 121: uint16_t config_vector;
122: int nvectors;
1.1.1.6 root 123: uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
1.1.1.2 root 124: uint32_t (*bad_features)(VirtIODevice *vdev);
1.1 root 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);
1.1.1.6 root 129: void (*set_status)(VirtIODevice *vdev, uint8_t val);
1.1 root 130: VirtQueue *vq;
1.1.1.4 root 131: const VirtIOBindings *binding;
132: void *binding_opaque;
133: uint16_t device_id;
1.1.1.7 root 134: bool vm_running;
135: VMChangeStateEntry *vmstate;
1.1 root 136: };
137:
1.1.1.6 root 138: static inline void virtio_set_status(VirtIODevice *vdev, uint8_t val)
139: {
140: if (vdev->set_status) {
141: vdev->set_status(vdev, val);
142: }
143: vdev->status = val;
144: }
145:
1.1 root 146: VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
147: void (*handle_output)(VirtIODevice *,
148: VirtQueue *));
149:
150: void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
151: unsigned int len);
152: void virtqueue_flush(VirtQueue *vq, unsigned int count);
153: void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
154: unsigned int len, unsigned int idx);
155:
1.1.1.6 root 156: void virtqueue_map_sg(struct iovec *sg, target_phys_addr_t *addr,
157: size_t num_sg, int is_write);
1.1 root 158: int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
159: int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);
160:
161: void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
162:
163: void virtio_save(VirtIODevice *vdev, QEMUFile *f);
164:
1.1.1.4 root 165: int virtio_load(VirtIODevice *vdev, QEMUFile *f);
1.1 root 166:
1.1.1.3 root 167: void virtio_cleanup(VirtIODevice *vdev);
168:
1.1 root 169: void virtio_notify_config(VirtIODevice *vdev);
170:
171: void virtio_queue_set_notification(VirtQueue *vq, int enable);
172:
173: int virtio_queue_ready(VirtQueue *vq);
174:
175: int virtio_queue_empty(VirtQueue *vq);
176:
1.1.1.4 root 177: /* Host binding interface. */
178:
179: VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
180: size_t config_size, size_t struct_size);
181: uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
182: uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
183: uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
184: void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
185: void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
186: void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
187: void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr);
188: target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
189: int virtio_queue_get_num(VirtIODevice *vdev, int n);
190: void virtio_queue_notify(VirtIODevice *vdev, int n);
191: uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
192: void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
193: void virtio_reset(void *opaque);
194: void virtio_update_irq(VirtIODevice *vdev);
195:
196: void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding,
197: void *opaque);
198:
199: /* Base devices. */
1.1.1.9 ! root 200: VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf,
! 201: char **serial);
1.1.1.7 root 202: struct virtio_net_conf;
203: VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf,
204: struct virtio_net_conf *net);
1.1.1.9 ! root 205: typedef struct virtio_serial_conf virtio_serial_conf;
! 206: VirtIODevice *virtio_serial_init(DeviceState *dev, virtio_serial_conf *serial);
1.1.1.4 root 207: VirtIODevice *virtio_balloon_init(DeviceState *dev);
1.1.1.6 root 208: #ifdef CONFIG_LINUX
209: VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf);
210: #endif
211:
1.1.1.4 root 212:
1.1.1.5 root 213: void virtio_net_exit(VirtIODevice *vdev);
1.1.1.6 root 214: void virtio_blk_exit(VirtIODevice *vdev);
1.1.1.7 root 215: void virtio_serial_exit(VirtIODevice *vdev);
1.1.1.9 ! root 216: void virtio_balloon_exit(VirtIODevice *vdev);
1.1.1.5 root 217:
1.1.1.6 root 218: #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
219: DEFINE_PROP_BIT("indirect_desc", _state, _field, \
1.1.1.9 ! root 220: VIRTIO_RING_F_INDIRECT_DESC, true), \
! 221: DEFINE_PROP_BIT("event_idx", _state, _field, \
! 222: VIRTIO_RING_F_EVENT_IDX, true)
1.1.1.6 root 223:
224: target_phys_addr_t virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
225: target_phys_addr_t virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
226: target_phys_addr_t virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
227: target_phys_addr_t virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
228: target_phys_addr_t virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
229: target_phys_addr_t virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
230: target_phys_addr_t virtio_queue_get_used_size(VirtIODevice *vdev, int n);
231: target_phys_addr_t virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
232: uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
233: void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
234: VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
235: EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
236: EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
1.1.1.7 root 237: void virtio_queue_notify_vq(VirtQueue *vq);
1.1.1.6 root 238: void virtio_irq(VirtQueue *vq);
1.1 root 239: #endif
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