ccw_device_dma_free(vcdev->cdev, thinint_area, sizeof(*thinint_area));
}
-static bool virtio_ccw_kvm_notify(struct virtqueue *vq)
+static inline bool virtio_ccw_do_kvm_notify(struct virtqueue *vq, u32 data)
{
struct virtio_ccw_vq_info *info = vq->priv;
struct virtio_ccw_device *vcdev;
BUILD_BUG_ON(sizeof(struct subchannel_id) != sizeof(unsigned int));
info->cookie = kvm_hypercall3(KVM_S390_VIRTIO_CCW_NOTIFY,
*((unsigned int *)&schid),
- vq->index, info->cookie);
+ data, info->cookie);
if (info->cookie < 0)
return false;
return true;
}
+static bool virtio_ccw_kvm_notify(struct virtqueue *vq)
+{
+ return virtio_ccw_do_kvm_notify(vq, vq->index);
+}
+
+static bool virtio_ccw_kvm_notify_with_data(struct virtqueue *vq)
+{
+ return virtio_ccw_do_kvm_notify(vq, vring_notification_data(vq));
+}
+
static int virtio_ccw_read_vq_conf(struct virtio_ccw_device *vcdev,
struct ccw1 *ccw, int index)
{
struct ccw1 *ccw)
{
struct virtio_ccw_device *vcdev = to_vc_device(vdev);
+ bool (*notify)(struct virtqueue *vq);
int err;
struct virtqueue *vq = NULL;
struct virtio_ccw_vq_info *info;
unsigned long flags;
bool may_reduce;
+ if (__virtio_test_bit(vdev, VIRTIO_F_NOTIFICATION_DATA))
+ notify = virtio_ccw_kvm_notify_with_data;
+ else
+ notify = virtio_ccw_kvm_notify;
+
/* Allocate queue. */
info = kzalloc(sizeof(struct virtio_ccw_vq_info), GFP_KERNEL);
if (!info) {
may_reduce = vcdev->revision > 0;
vq = vring_create_virtqueue(i, info->num, KVM_VIRTIO_CCW_RING_ALIGN,
vdev, true, may_reduce, ctx,
- virtio_ccw_kvm_notify, callback, name);
+ notify, callback, name);
if (!vq) {
/* For now, we fail if we can't get the requested size. */
return true;
}
+static bool vm_notify_with_data(struct virtqueue *vq)
+{
+ struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vq->vdev);
+ u32 data = vring_notification_data(vq);
+
+ writel(data, vm_dev->base + VIRTIO_MMIO_QUEUE_NOTIFY);
+
+ return true;
+}
+
/* Notify all virtqueues on an interrupt. */
static irqreturn_t vm_interrupt(int irq, void *opaque)
{
const char *name, bool ctx)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
+ bool (*notify)(struct virtqueue *vq);
struct virtio_mmio_vq_info *info;
struct virtqueue *vq;
unsigned long flags;
unsigned int num;
int err;
+ if (__virtio_test_bit(vdev, VIRTIO_F_NOTIFICATION_DATA))
+ notify = vm_notify_with_data;
+ else
+ notify = vm_notify;
+
if (!name)
return NULL;
/* Create the vring */
vq = vring_create_virtqueue(index, num, VIRTIO_MMIO_VRING_ALIGN, vdev,
- true, true, ctx, vm_notify, callback, name);
+ true, true, ctx, notify, callback, name);
if (!vq) {
err = -ENOMEM;
goto error_new_virtqueue;
return vp_modern_config_vector(&vp_dev->mdev, vector);
}
+static bool vp_notify_with_data(struct virtqueue *vq)
+{
+ u32 data = vring_notification_data(vq);
+
+ iowrite32(data, (void __iomem *)vq->priv);
+
+ return true;
+}
+
static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
struct virtio_pci_vq_info *info,
unsigned int index,
{
struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
+ bool (*notify)(struct virtqueue *vq);
struct virtqueue *vq;
u16 num;
int err;
+ if (__virtio_test_bit(&vp_dev->vdev, VIRTIO_F_NOTIFICATION_DATA))
+ notify = vp_notify_with_data;
+ else
+ notify = vp_notify;
+
if (index >= vp_modern_get_num_queues(mdev))
return ERR_PTR(-EINVAL);
vq = vring_create_virtqueue(index, num,
SMP_CACHE_BYTES, &vp_dev->vdev,
true, true, ctx,
- vp_notify, callback, name);
+ notify, callback, name);
if (!vq)
return ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL_GPL(vring_del_virtqueue);
+u32 vring_notification_data(struct virtqueue *_vq)
+{
+ struct vring_virtqueue *vq = to_vvq(_vq);
+ u16 next;
+
+ if (vq->packed_ring)
+ next = (vq->packed.next_avail_idx &
+ ~(-(1 << VRING_PACKED_EVENT_F_WRAP_CTR))) |
+ vq->packed.avail_wrap_counter <<
+ VRING_PACKED_EVENT_F_WRAP_CTR;
+ else
+ next = vq->split.avail_idx_shadow;
+
+ return next << 16 | _vq->index;
+}
+EXPORT_SYMBOL_GPL(vring_notification_data);
+
/* Manipulates transport-specific feature bits. */
void vring_transport_features(struct virtio_device *vdev)
{
break;
case VIRTIO_F_ORDER_PLATFORM:
break;
+ case VIRTIO_F_NOTIFICATION_DATA:
+ break;
default:
/* We don't understand this bit. */
__virtio_clear_bit(vdev, i);
void vring_transport_features(struct virtio_device *vdev);
irqreturn_t vring_interrupt(int irq, void *_vq);
+
+u32 vring_notification_data(struct virtqueue *_vq);
#endif /* _LINUX_VIRTIO_RING_H */
#define VIRTIO_F_SR_IOV 37
/*
+ * This feature indicates that the driver passes extra data (besides
+ * identifying the virtqueue) in its device notifications.
+ */
+#define VIRTIO_F_NOTIFICATION_DATA 38
+
+/*
* This feature indicates that the driver can reset a queue individually.
*/
#define VIRTIO_F_RING_RESET 40