2008-12-04 20:38:57 +01:00
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/*
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* Virtio Support
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*
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* Copyright IBM, Corp. 2007
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef _QEMU_VIRTIO_H
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#define _QEMU_VIRTIO_H
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2013-02-04 15:40:22 +01:00
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#include "hw/hw.h"
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2012-10-24 08:43:34 +02:00
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#include "net/net.h"
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2013-02-04 15:40:22 +01:00
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#include "hw/qdev.h"
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2012-12-17 18:20:04 +01:00
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#include "sysemu/sysemu.h"
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2012-12-17 18:20:00 +01:00
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#include "qemu/event_notifier.h"
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2015-02-16 22:35:46 +01:00
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#include "standard-headers/linux/virtio_config.h"
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#include "standard-headers/linux/virtio_ring.h"
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2008-12-04 20:38:57 +01:00
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2009-04-05 19:40:08 +02:00
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/* A guest should never accept this. It implies negotiation is broken. */
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#define VIRTIO_F_BAD_FEATURE 30
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2008-12-04 20:38:57 +01:00
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struct VirtQueue;
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2012-10-23 12:30:10 +02:00
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static inline hwaddr vring_align(hwaddr addr,
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2008-12-04 20:58:45 +01:00
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unsigned long align)
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{
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return (addr + align - 1) & ~(align - 1);
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}
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2008-12-04 20:38:57 +01:00
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typedef struct VirtQueue VirtQueue;
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#define VIRTQUEUE_MAX_SIZE 1024
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typedef struct VirtQueueElement
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{
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unsigned int index;
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unsigned int out_num;
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unsigned int in_num;
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2012-10-23 12:30:10 +02:00
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hwaddr in_addr[VIRTQUEUE_MAX_SIZE];
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hwaddr out_addr[VIRTQUEUE_MAX_SIZE];
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2008-12-04 20:38:57 +01:00
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struct iovec in_sg[VIRTQUEUE_MAX_SIZE];
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struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
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} VirtQueueElement;
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2010-01-19 20:06:51 +01:00
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#define VIRTIO_PCI_QUEUE_MAX 64
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2008-12-04 20:38:57 +01:00
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2009-06-21 18:50:13 +02:00
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#define VIRTIO_NO_VECTOR 0xffff
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2013-01-15 00:08:02 +01:00
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#define TYPE_VIRTIO_DEVICE "virtio-device"
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#define VIRTIO_DEVICE_GET_CLASS(obj) \
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OBJECT_GET_CLASS(VirtioDeviceClass, obj, TYPE_VIRTIO_DEVICE)
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#define VIRTIO_DEVICE_CLASS(klass) \
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OBJECT_CLASS_CHECK(VirtioDeviceClass, klass, TYPE_VIRTIO_DEVICE)
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#define VIRTIO_DEVICE(obj) \
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OBJECT_CHECK(VirtIODevice, (obj), TYPE_VIRTIO_DEVICE)
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2014-06-24 19:38:54 +02:00
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enum virtio_device_endian {
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VIRTIO_DEVICE_ENDIAN_UNKNOWN,
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VIRTIO_DEVICE_ENDIAN_LITTLE,
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VIRTIO_DEVICE_ENDIAN_BIG,
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};
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2008-12-04 20:38:57 +01:00
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struct VirtIODevice
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{
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2013-01-15 00:08:02 +01:00
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DeviceState parent_obj;
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2008-12-04 20:38:57 +01:00
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const char *name;
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uint8_t status;
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uint8_t isr;
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uint16_t queue_sel;
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2010-01-10 12:52:47 +01:00
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uint32_t guest_features;
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2008-12-04 20:38:57 +01:00
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size_t config_len;
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void *config;
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2009-06-21 18:50:13 +02:00
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uint16_t config_vector;
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int nvectors;
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2008-12-04 20:38:57 +01:00
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VirtQueue *vq;
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2009-05-18 15:51:59 +02:00
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uint16_t device_id;
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2011-01-10 13:28:40 +01:00
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bool vm_running;
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VMChangeStateEntry *vmstate;
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2013-04-30 16:08:48 +02:00
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char *bus_name;
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2014-06-24 19:38:54 +02:00
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uint8_t device_endian;
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2015-04-27 21:01:20 +02:00
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QLIST_HEAD(, VirtQueue) *vector_queues;
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2008-12-04 20:38:57 +01:00
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};
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2013-01-15 00:08:02 +01:00
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typedef struct VirtioDeviceClass {
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2013-07-30 04:05:02 +02:00
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/*< private >*/
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2013-01-15 00:08:02 +01:00
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DeviceClass parent;
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2013-07-30 04:05:02 +02:00
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/*< public >*/
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2013-07-30 00:50:27 +02:00
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/* This is what a VirtioDevice must implement */
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DeviceRealize realize;
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2013-07-30 03:50:44 +02:00
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DeviceUnrealize unrealize;
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2013-01-15 00:08:02 +01:00
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uint32_t (*get_features)(VirtIODevice *vdev, uint32_t requested_features);
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uint32_t (*bad_features)(VirtIODevice *vdev);
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void (*set_features)(VirtIODevice *vdev, uint32_t val);
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void (*get_config)(VirtIODevice *vdev, uint8_t *config);
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void (*set_config)(VirtIODevice *vdev, const uint8_t *config);
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void (*reset)(VirtIODevice *vdev);
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void (*set_status)(VirtIODevice *vdev, uint8_t val);
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2013-04-11 16:29:56 +02:00
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/* Test and clear event pending status.
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* Should be called after unmask to avoid losing events.
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* If backend does not support masking,
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* must check in frontend instead.
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*/
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bool (*guest_notifier_pending)(VirtIODevice *vdev, int n);
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/* Mask/unmask events from this vq. Any events reported
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* while masked will become pending.
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* If backend does not support masking,
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* must mask in frontend instead.
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*/
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void (*guest_notifier_mask)(VirtIODevice *vdev, int n, bool mask);
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2014-06-24 19:15:31 +02:00
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void (*save)(VirtIODevice *vdev, QEMUFile *f);
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int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id);
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2013-01-15 00:08:02 +01:00
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} VirtioDeviceClass;
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2014-09-30 08:10:38 +02:00
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void virtio_instance_init_common(Object *proxy_obj, void *data,
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size_t vdev_size, const char *vdev_name);
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2013-01-15 00:08:02 +01:00
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void virtio_init(VirtIODevice *vdev, const char *name,
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uint16_t device_id, size_t config_size);
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2013-04-24 10:21:22 +02:00
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void virtio_cleanup(VirtIODevice *vdev);
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2013-01-15 00:08:02 +01:00
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2013-04-30 16:08:48 +02:00
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/* Set the child bus name. */
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void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name);
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2008-12-04 20:38:57 +01:00
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VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size,
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void (*handle_output)(VirtIODevice *,
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VirtQueue *));
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2013-01-30 12:12:36 +01:00
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void virtio_del_queue(VirtIODevice *vdev, int n);
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2008-12-04 20:38:57 +01:00
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void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
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unsigned int len);
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void virtqueue_flush(VirtQueue *vq, unsigned int count);
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void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
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unsigned int len, unsigned int idx);
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2012-10-23 12:30:10 +02:00
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void virtqueue_map_sg(struct iovec *sg, hwaddr *addr,
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2010-08-03 16:54:38 +02:00
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size_t num_sg, int is_write);
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2008-12-04 20:38:57 +01:00
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int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem);
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2012-09-24 20:35:15 +02:00
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int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes,
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unsigned int out_bytes);
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void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes,
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2012-11-29 23:02:56 +01:00
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unsigned int *out_bytes,
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unsigned max_in_bytes, unsigned max_out_bytes);
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2008-12-04 20:38:57 +01:00
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void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
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void virtio_save(VirtIODevice *vdev, QEMUFile *f);
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2014-06-24 19:15:31 +02:00
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int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id);
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2008-12-04 20:38:57 +01:00
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void virtio_notify_config(VirtIODevice *vdev);
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void virtio_queue_set_notification(VirtQueue *vq, int enable);
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int virtio_queue_ready(VirtQueue *vq);
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int virtio_queue_empty(VirtQueue *vq);
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2009-05-18 15:51:59 +02:00
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/* Host binding interface. */
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uint32_t virtio_config_readb(VirtIODevice *vdev, uint32_t addr);
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uint32_t virtio_config_readw(VirtIODevice *vdev, uint32_t addr);
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uint32_t virtio_config_readl(VirtIODevice *vdev, uint32_t addr);
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void virtio_config_writeb(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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void virtio_config_writew(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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void virtio_config_writel(VirtIODevice *vdev, uint32_t addr, uint32_t data);
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2012-10-23 12:30:10 +02:00
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void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr);
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hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n);
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2013-07-16 14:25:07 +02:00
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void virtio_queue_set_num(VirtIODevice *vdev, int n, int num);
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2009-05-18 15:51:59 +02:00
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int virtio_queue_get_num(VirtIODevice *vdev, int n);
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2013-07-16 14:25:08 +02:00
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void virtio_queue_set_align(VirtIODevice *vdev, int n, int align);
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2009-05-18 15:51:59 +02:00
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void virtio_queue_notify(VirtIODevice *vdev, int n);
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2009-06-21 18:50:13 +02:00
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uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);
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void virtio_queue_set_vector(VirtIODevice *vdev, int n, uint16_t vector);
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2011-09-13 14:34:37 +02:00
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void virtio_set_status(VirtIODevice *vdev, uint8_t val);
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2009-05-18 15:51:59 +02:00
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void virtio_reset(void *opaque);
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void virtio_update_irq(VirtIODevice *vdev);
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2011-11-24 13:28:52 +01:00
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int virtio_set_features(VirtIODevice *vdev, uint32_t val);
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2009-05-18 15:51:59 +02:00
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/* Base devices. */
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2012-05-16 12:54:05 +02:00
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typedef struct VirtIOBlkConf VirtIOBlkConf;
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2010-09-02 17:00:50 +02:00
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struct virtio_net_conf;
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2011-02-03 06:52:32 +01:00
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typedef struct virtio_serial_conf virtio_serial_conf;
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2011-02-11 09:40:59 +01:00
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typedef struct VirtIOSCSIConf VirtIOSCSIConf;
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2012-06-20 08:59:32 +02:00
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typedef struct VirtIORNGConf VirtIORNGConf;
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2009-10-21 15:25:35 +02:00
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2010-01-10 12:52:53 +01:00
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#define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
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DEFINE_PROP_BIT("indirect_desc", _state, _field, \
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2011-06-12 15:21:57 +02:00
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VIRTIO_RING_F_INDIRECT_DESC, true), \
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DEFINE_PROP_BIT("event_idx", _state, _field, \
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VIRTIO_RING_F_EVENT_IDX, true)
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2010-01-10 12:52:53 +01:00
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2012-10-23 12:30:10 +02:00
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hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_avail_addr(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_used_addr(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_ring_addr(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_desc_size(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_avail_size(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_used_size(VirtIODevice *vdev, int n);
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hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n);
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2010-03-17 12:08:02 +01:00
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uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n);
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void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx);
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2013-08-12 11:08:09 +02:00
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void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n);
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2010-03-17 12:08:02 +01:00
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VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n);
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2013-01-30 12:12:37 +01:00
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uint16_t virtio_get_queue_index(VirtQueue *vq);
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2012-04-06 10:38:37 +02:00
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int virtio_queue_get_id(VirtQueue *vq);
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2010-03-17 12:08:02 +01:00
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EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
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2012-07-05 17:16:30 +02:00
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void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
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bool with_irqfd);
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2010-03-17 12:08:02 +01:00
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EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
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2012-08-06 15:26:14 +02:00
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void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
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bool set_handler);
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2010-12-17 13:01:50 +01:00
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void virtio_queue_notify_vq(VirtQueue *vq);
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2010-03-17 12:08:02 +01:00
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void virtio_irq(VirtQueue *vq);
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2015-04-23 08:21:46 +02:00
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VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);
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VirtQueue *virtio_vector_next_queue(VirtQueue *vq);
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2014-06-24 19:26:29 +02:00
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2014-12-11 14:25:05 +01:00
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static inline void virtio_add_feature(uint32_t *features, unsigned int fbit)
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{
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assert(fbit < 32);
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*features |= (1 << fbit);
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}
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static inline void virtio_clear_feature(uint32_t *features, unsigned int fbit)
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{
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assert(fbit < 32);
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*features &= ~(1 << fbit);
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}
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2014-12-11 14:25:06 +01:00
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static inline bool __virtio_has_feature(uint32_t features, unsigned int fbit)
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{
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assert(fbit < 32);
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return !!(features & (1 << fbit));
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}
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static inline bool virtio_has_feature(VirtIODevice *vdev, unsigned int fbit)
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{
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return __virtio_has_feature(vdev->guest_features, fbit);
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}
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2014-06-24 19:38:54 +02:00
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static inline bool virtio_is_big_endian(VirtIODevice *vdev)
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2014-06-24 19:26:29 +02:00
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{
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2014-06-24 19:38:54 +02:00
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assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN);
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return vdev->device_endian == VIRTIO_DEVICE_ENDIAN_BIG;
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2014-06-24 19:26:29 +02:00
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}
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2008-12-04 20:38:57 +01:00
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#endif
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