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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
1.1.1.2 root 49: /* A guest should never accept this. It implies negotiation is broken. */
50: #define VIRTIO_F_BAD_FEATURE 30
1.1 root 51:
52: /* from Linux's linux/virtio_ring.h */
53:
54: /* This marks a buffer as continuing via the next field. */
55: #define VRING_DESC_F_NEXT 1
56: /* This marks a buffer as write-only (otherwise read-only). */
57: #define VRING_DESC_F_WRITE 2
1.1.1.4 root 58: /* This means the buffer contains a list of buffer descriptors. */
59: #define VRING_DESC_F_INDIRECT 4
1.1 root 60:
61: /* This means don't notify other side when buffer added. */
62: #define VRING_USED_F_NO_NOTIFY 1
63: /* This means don't interrupt guest when buffer consumed. */
64: #define VRING_AVAIL_F_NO_INTERRUPT 1
65:
66: struct VirtQueue;
67:
68: static inline target_phys_addr_t vring_align(target_phys_addr_t addr,
69: unsigned long align)
70: {
71: return (addr + align - 1) & ~(align - 1);
72: }
73:
74: typedef struct VirtQueue VirtQueue;
75:
76: #define VIRTQUEUE_MAX_SIZE 1024
77:
78: typedef struct VirtQueueElement
79: {
80: unsigned int index;
81: unsigned int out_num;
82: unsigned int in_num;
83: target_phys_addr_t in_addr[VIRTQUEUE_MAX_SIZE];
1.1.1.6 root 84: target_phys_addr_t out_addr[VIRTQUEUE_MAX_SIZE];
1.1 root 85: struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
86: struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
87: } VirtQueueElement;
88:
1.1.1.4 root 89: typedef struct {
90: void (*notify)(void * opaque, uint16_t vector);
91: void (*save_config)(void * opaque, QEMUFile *f);
92: void (*save_queue)(void * opaque, int n, QEMUFile *f);
93: int (*load_config)(void * opaque, QEMUFile *f);
94: int (*load_queue)(void * opaque, int n, QEMUFile *f);
1.1.1.8 ! root 95: int (*load_done)(void * opaque, QEMUFile *f);
1.1.1.5 root 96: unsigned (*get_features)(void * opaque);
1.1.1.7 root 97: bool (*query_guest_notifiers)(void * opaque);
1.1.1.6 root 98: int (*set_guest_notifiers)(void * opaque, bool assigned);
99: int (*set_host_notifier)(void * opaque, int n, bool assigned);
1.1.1.7 root 100: void (*vmstate_change)(void * opaque, bool running);
1.1.1.4 root 101: } VirtIOBindings;
102:
1.1.1.6 root 103: #define VIRTIO_PCI_QUEUE_MAX 64
1.1 root 104:
1.1.1.4 root 105: #define VIRTIO_NO_VECTOR 0xffff
106:
1.1 root 107: struct VirtIODevice
108: {
109: const char *name;
110: uint8_t status;
111: uint8_t isr;
112: uint16_t queue_sel;
1.1.1.6 root 113: uint32_t guest_features;
1.1 root 114: size_t config_len;
115: void *config;
1.1.1.4 root 116: uint16_t config_vector;
117: int nvectors;
1.1.1.6 root 118: uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
1.1.1.2 root 119: uint32_t (*bad_features)(VirtIODevice *vdev);
1.1 root 120: void (*set_features)(VirtIODevice *vdev, uint32_t val);
121: void (*get_config)(VirtIODevice *vdev, uint8_t *config);
122: void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
123: void (*reset)(VirtIODevice *vdev);
1.1.1.6 root 124: void (*set_status)(VirtIODevice *vdev, uint8_t val);
1.1 root 125: VirtQueue *vq;
1.1.1.4 root 126: const VirtIOBindings *binding;
127: void *binding_opaque;
128: uint16_t device_id;
1.1.1.7 root 129: bool vm_running;
130: VMChangeStateEntry *vmstate;
1.1 root 131: };
132:
1.1.1.6 root 133: static inline void virtio_set_status(VirtIODevice *vdev, uint8_t val)
134: {
135: if (vdev->set_status) {
136: vdev->set_status(vdev, val);
137: }
138: vdev->status = val;
139: }
140:
1.1 root 141: VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
142: void (*handle_output)(VirtIODevice *,
143: VirtQueue *));
144:
145: void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
146: unsigned int len);
147: void virtqueue_flush(VirtQueue *vq, unsigned int count);
148: void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
149: unsigned int len, unsigned int idx);
150:
1.1.1.6 root 151: void virtqueue_map_sg(struct iovec *sg, target_phys_addr_t *addr,
152: size_t num_sg, int is_write);
1.1 root 153: int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
154: int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes);
155:
156: void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
157:
158: void virtio_save(VirtIODevice *vdev, QEMUFile *f);
159:
1.1.1.4 root 160: int virtio_load(VirtIODevice *vdev, QEMUFile *f);
1.1 root 161:
1.1.1.3 root 162: void virtio_cleanup(VirtIODevice *vdev);
163:
1.1 root 164: void virtio_notify_config(VirtIODevice *vdev);
165:
166: void virtio_queue_set_notification(VirtQueue *vq, int enable);
167:
168: int virtio_queue_ready(VirtQueue *vq);
169:
170: int virtio_queue_empty(VirtQueue *vq);
171:
1.1.1.4 root 172: /* Host binding interface. */
173:
174: VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
175: size_t config_size, size_t struct_size);
176: uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
177: uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
178: uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
179: void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
180: void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
181: void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
182: void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr);
183: target_phys_addr_t virtio_queue_get_addr(VirtIODevice *vdev, int n);
184: int virtio_queue_get_num(VirtIODevice *vdev, int n);
185: void virtio_queue_notify(VirtIODevice *vdev, int n);
186: uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
187: void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
188: void virtio_reset(void *opaque);
189: void virtio_update_irq(VirtIODevice *vdev);
190:
191: void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding,
192: void *opaque);
193:
194: /* Base devices. */
1.1.1.6 root 195: VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf);
1.1.1.7 root 196: struct virtio_net_conf;
197: VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf,
198: struct virtio_net_conf *net);
1.1.1.6 root 199: VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports);
1.1.1.4 root 200: VirtIODevice *virtio_balloon_init(DeviceState *dev);
1.1.1.6 root 201: #ifdef CONFIG_LINUX
202: VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf);
203: #endif
204:
1.1.1.4 root 205:
1.1.1.5 root 206: void virtio_net_exit(VirtIODevice *vdev);
1.1.1.6 root 207: void virtio_blk_exit(VirtIODevice *vdev);
1.1.1.7 root 208: void virtio_serial_exit(VirtIODevice *vdev);
1.1.1.5 root 209:
1.1.1.6 root 210: #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
211: DEFINE_PROP_BIT("indirect_desc", _state, _field, \
212: VIRTIO_RING_F_INDIRECT_DESC, true)
213:
214: target_phys_addr_t virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
215: target_phys_addr_t virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
216: target_phys_addr_t virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
217: target_phys_addr_t virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
218: target_phys_addr_t virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
219: target_phys_addr_t virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
220: target_phys_addr_t virtio_queue_get_used_size(VirtIODevice *vdev, int n);
221: target_phys_addr_t virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
222: uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
223: void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
224: VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
225: EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
226: EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
1.1.1.7 root 227: void virtio_queue_notify_vq(VirtQueue *vq);
1.1.1.6 root 228: void virtio_irq(VirtQueue *vq);
1.1 root 229: #endif
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