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qemu/virtio: virtio support for many interrupt vectors

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Extend virtio to support many interrupt vectors, and rearrange code in
preparation for multi-vector support (mostly move reset out to bindings,
because we will have to reset the vectors in transport-specific code).
Actual bindings in pci, and use in net, to follow.
Load and save are not connected to bindings yet, so they are left
stubbed out for now.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Michael S. Tsirkin 2009-06-21 19:50:13 +03:00 • committed by Anthony Liguori
parent 54c96da798
commit 7055e687cd
4 changed files with 81 additions and 25 deletions
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10
hw/virtio.h
View file

@ -75,11 +75,13 @@ typedef struct VirtQueueElement
} VirtQueueElement;
typedef struct {
void (*update_irq)(void * opaque);
void (*notify)(void * opaque, uint16_t vector);
} VirtIOBindings;
#define VIRTIO_PCI_QUEUE_MAX 16
#define VIRTIO_NO_VECTOR 0xffff
struct VirtIODevice
{
const char *name;
@ -89,6 +91,8 @@ struct VirtIODevice
uint32_t features;
size_t config_len;
void *config;
uint16_t config_vector;
int nvectors;
uint32_t (*get_features)(VirtIODevice *vdev);
uint32_t (*bad_features)(VirtIODevice *vdev);
void (*set_features)(VirtIODevice *vdev, uint32_t val);
@ -118,7 +122,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
void virtio_save(VirtIODevice *vdev, QEMUFile *f);
void virtio_load(VirtIODevice *vdev, QEMUFile *f);
int virtio_load(VirtIODevice *vdev, QEMUFile *f);
void virtio_cleanup(VirtIODevice *vdev);
@ -144,6 +148,8 @@ void virtio_queue_set_addr(VirtIODevice *vdev, int n, target_phys_addr_t addr);
target_phys_addr_t 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_reset(void *opaque);
void virtio_update_irq(VirtIODevice *vdev);