NTSTATUS virtio_find_queue(VirtIODevice *vdev, unsigned index,
struct virtqueue **vq)
{
u16 msix_vec = vdev_get_msix_vector(vdev, index);
return vp_setup_vq(
vq,
vdev,
index,
msix_vec);
}
NTSTATUS virtio_find_queues(VirtIODevice *vdev,
unsigned nvqs,
struct virtqueue *vqs[])
{
unsigned i;
NTSTATUS status;
u16 msix_vec;
status = virtio_reserve_queue_memory(vdev, nvqs);
if (!NT_SUCCESS(status)) {
return status;
}
/* set up the device config interrupt */
msix_vec = vdev_get_msix_vector(vdev, -1);
if (msix_vec != VIRTIO_MSI_NO_VECTOR) {
msix_vec = vdev->device->set_config_vector(vdev, msix_vec);
/* Verify we had enough resources to assign the vector */
if (msix_vec == VIRTIO_MSI_NO_VECTOR) {
status = STATUS_DEVICE_BUSY;
goto error_find;
}
}
/* set up queue interrupts */
for (i = 0; i < nvqs; i++) {
msix_vec = vdev_get_msix_vector(vdev, i);
status = vp_setup_vq(
&vqs[i],
vdev,
i,
msix_vec);
if (!NT_SUCCESS(status)) {
goto error_find;
}
}
return STATUS_SUCCESS;
error_find:
virtio_delete_queues(vdev);
return status;
}
