+++ /dev/null
-/*
- * Virtio Support
- *
- * Copyright IBM, Corp. 2007
- *
- * Authors:
- * Anthony Liguori <aliguori@us.ibm.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#ifndef _QEMU_VIRTIO_H
-#define _QEMU_VIRTIO_H
-
-#include "hw/hw.h"
-#include "net/net.h"
-#include "hw/qdev.h"
-#include "sysemu/sysemu.h"
-#include "qemu/event_notifier.h"
-#ifdef CONFIG_VIRTFS
-#include "hw/9pfs/virtio-9p-device.h"
-#endif
-
-/* from Linux's linux/virtio_config.h */
-
-/* Status byte for guest to report progress, and synchronize features. */
-/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
-#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
-/* We have found a driver for the device. */
-#define VIRTIO_CONFIG_S_DRIVER 2
-/* Driver has used its parts of the config, and is happy */
-#define VIRTIO_CONFIG_S_DRIVER_OK 4
-/* We've given up on this device. */
-#define VIRTIO_CONFIG_S_FAILED 0x80
-
-/* Some virtio feature bits (currently bits 28 through 31) are reserved for the
- * transport being used (eg. virtio_ring), the rest are per-device feature bits. */
-#define VIRTIO_TRANSPORT_F_START 28
-#define VIRTIO_TRANSPORT_F_END 32
-
-/* We notify when the ring is completely used, even if the guest is suppressing
- * callbacks */
-#define VIRTIO_F_NOTIFY_ON_EMPTY 24
-/* We support indirect buffer descriptors */
-#define VIRTIO_RING_F_INDIRECT_DESC 28
-/* The Guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field. */
-/* The Host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field. */
-#define VIRTIO_RING_F_EVENT_IDX 29
-/* A guest should never accept this. It implies negotiation is broken. */
-#define VIRTIO_F_BAD_FEATURE 30
-
-/* from Linux's linux/virtio_ring.h */
-
-/* This marks a buffer as continuing via the next field. */
-#define VRING_DESC_F_NEXT 1
-/* This marks a buffer as write-only (otherwise read-only). */
-#define VRING_DESC_F_WRITE 2
-/* This means the buffer contains a list of buffer descriptors. */
-#define VRING_DESC_F_INDIRECT 4
-
-/* This means don't notify other side when buffer added. */
-#define VRING_USED_F_NO_NOTIFY 1
-/* This means don't interrupt guest when buffer consumed. */
-#define VRING_AVAIL_F_NO_INTERRUPT 1
-
-struct VirtQueue;
-
-static inline hwaddr vring_align(hwaddr addr,
- unsigned long align)
-{
- return (addr + align - 1) & ~(align - 1);
-}
-
-typedef struct VirtQueue VirtQueue;
-
-#define VIRTQUEUE_MAX_SIZE 1024
-
-typedef struct VirtQueueElement
-{
- unsigned int index;
- unsigned int out_num;
- unsigned int in_num;
- hwaddr in_addr[VIRTQUEUE_MAX_SIZE];
- hwaddr out_addr[VIRTQUEUE_MAX_SIZE];
- struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
- struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
-} VirtQueueElement;
-
-typedef struct {
- void (*notify)(DeviceState *d, uint16_t vector);
- void (*save_config)(DeviceState *d, QEMUFile *f);
- void (*save_queue)(DeviceState *d, int n, QEMUFile *f);
- int (*load_config)(DeviceState *d, QEMUFile *f);
- int (*load_queue)(DeviceState *d, int n, QEMUFile *f);
- int (*load_done)(DeviceState *d, QEMUFile *f);
- unsigned (*get_features)(DeviceState *d);
- bool (*query_guest_notifiers)(DeviceState *d);
- int (*set_guest_notifiers)(DeviceState *d, int nvqs, bool assigned);
- int (*set_host_notifier)(DeviceState *d, int n, bool assigned);
- void (*vmstate_change)(DeviceState *d, bool running);
-} VirtIOBindings;
-
-#define VIRTIO_PCI_QUEUE_MAX 64
-
-#define VIRTIO_NO_VECTOR 0xffff
-
-#define TYPE_VIRTIO_DEVICE "virtio-device"
-#define VIRTIO_DEVICE_GET_CLASS(obj) \
- OBJECT_GET_CLASS(VirtioDeviceClass, obj, TYPE_VIRTIO_DEVICE)
-#define VIRTIO_DEVICE_CLASS(klass) \
- OBJECT_CLASS_CHECK(VirtioDeviceClass, klass, TYPE_VIRTIO_DEVICE)
-#define VIRTIO_DEVICE(obj) \
- OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE)
-
-struct VirtIODevice
-{
- DeviceState parent_obj;
- const char *name;
- uint8_t status;
- uint8_t isr;
- uint16_t queue_sel;
- uint32_t guest_features;
- size_t config_len;
- void *config;
- uint16_t config_vector;
- int nvectors;
- /*
- * Function pointers will be removed at the end of the series as they are in
- * VirtioDeviceClass.
- */
- uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
- uint32_t (*bad_features)(VirtIODevice *vdev);
- void (*set_features)(VirtIODevice *vdev, uint32_t val);
- void (*get_config)(VirtIODevice *vdev, uint8_t *config);
- void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
- void (*reset)(VirtIODevice *vdev);
- void (*set_status)(VirtIODevice *vdev, uint8_t val);
- /* Test and clear event pending status.
- * Should be called after unmask to avoid losing events.
- * If backend does not support masking,
- * must check in frontend instead.
- */
- bool (*guest_notifier_pending)(VirtIODevice *vdev, int n);
- /* Mask/unmask events from this vq. Any events reported
- * while masked will become pending.
- * If backend does not support masking,
- * must mask in frontend instead.
- */
- void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask);
-
- VirtQueue *vq;
- const VirtIOBindings *binding;
- DeviceState *binding_opaque;
- uint16_t device_id;
- bool vm_running;
- VMChangeStateEntry *vmstate;
-};
-
-typedef struct VirtioDeviceClass {
- /* This is what a VirtioDevice must implement */
- DeviceClass parent;
- int (*init)(VirtIODevice *vdev);
- uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
- uint32_t (*bad_features)(VirtIODevice *vdev);
- void (*set_features)(VirtIODevice *vdev, uint32_t val);
- void (*get_config)(VirtIODevice *vdev, uint8_t *config);
- void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
- void (*reset)(VirtIODevice *vdev);
- void (*set_status)(VirtIODevice *vdev, uint8_t val);
-} VirtioDeviceClass;
-
-void virtio_init(VirtIODevice *vdev, const char *name,
- uint16_t device_id, size_t config_size);
-void virtio_common_cleanup(VirtIODevice *vdev);
-
-VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
- void (*handle_output)(VirtIODevice *,
- VirtQueue *));
-
-void virtio_del_queue(VirtIODevice *vdev, int n);
-
-void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
- unsigned int len);
-void virtqueue_flush(VirtQueue *vq, unsigned int count);
-void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
- unsigned int len, unsigned int idx);
-
-void virtqueue_map_sg(struct iovec *sg, hwaddr *addr,
- size_t num_sg, int is_write);
-int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
-int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes,
- unsigned int out_bytes);
-void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes,
- unsigned int *out_bytes,
- unsigned max_in_bytes, unsigned max_out_bytes);
-
-void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
-
-void virtio_save(VirtIODevice *vdev, QEMUFile *f);
-
-int virtio_load(VirtIODevice *vdev, QEMUFile *f);
-
-void virtio_cleanup(VirtIODevice *vdev);
-
-void virtio_notify_config(VirtIODevice *vdev);
-
-void virtio_queue_set_notification(VirtQueue *vq, int enable);
-
-int virtio_queue_ready(VirtQueue *vq);
-
-int virtio_queue_empty(VirtQueue *vq);
-
-/* Host binding interface. */
-
-VirtIODevice *virtio_common_init(const char *name, uint16_t device_id,
- size_t config_size, size_t struct_size);
-uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
-uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
-uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
-void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
-void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
-void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
-void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr);
-hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n);
-int virtio_queue_get_num(VirtIODevice *vdev, int n);
-void virtio_queue_notify(VirtIODevice *vdev, int n);
-uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
-void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
-void virtio_set_status(VirtIODevice *vdev, uint8_t val);
-void virtio_reset(void *opaque);
-void virtio_update_irq(VirtIODevice *vdev);
-int virtio_set_features(VirtIODevice *vdev, uint32_t val);
-
-void virtio_bind_device(VirtIODevice *vdev, const VirtIOBindings *binding,
- DeviceState *opaque);
-
-/* Base devices. */
-typedef struct VirtIOBlkConf VirtIOBlkConf;
-struct virtio_net_conf;
-VirtIODevice *virtio_net_init(DeviceState *dev, NICConf *conf,
- struct virtio_net_conf *net,
- uint32_t host_features);
-typedef struct virtio_serial_conf virtio_serial_conf;
-VirtIODevice *virtio_serial_init(DeviceState *dev, virtio_serial_conf *serial);
-VirtIODevice *virtio_balloon_init(DeviceState *dev);
-typedef struct VirtIOSCSIConf VirtIOSCSIConf;
-VirtIODevice *virtio_scsi_init(DeviceState *dev, VirtIOSCSIConf *conf);
-typedef struct VirtIORNGConf VirtIORNGConf;
-VirtIODevice *virtio_rng_init(DeviceState *dev, VirtIORNGConf *conf);
-#ifdef CONFIG_VIRTFS
-VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf);
-#endif
-
-
-void virtio_net_exit(VirtIODevice *vdev);
-void virtio_serial_exit(VirtIODevice *vdev);
-void virtio_balloon_exit(VirtIODevice *vdev);
-void virtio_scsi_exit(VirtIODevice *vdev);
-void virtio_rng_exit(VirtIODevice *vdev);
-
-#define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
- DEFINE_PROP_BIT("indirect_desc", _state, _field, \
- VIRTIO_RING_F_INDIRECT_DESC, true), \
- DEFINE_PROP_BIT("event_idx", _state, _field, \
- VIRTIO_RING_F_EVENT_IDX, true)
-
-hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n);
-hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
-uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
-void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
-VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
-uint16_t virtio_get_queue_index(VirtQueue *vq);
-int virtio_queue_get_id(VirtQueue *vq);
-EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
-void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
- bool with_irqfd);
-EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
-void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
- bool set_handler);
-void virtio_queue_notify_vq(VirtQueue *vq);
-void virtio_irq(VirtQueue *vq);
-#endif
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