On Wed, Apr 06, 2022 at 04:35:37PM +0800, Jason Wang wrote:
> This patch implements PCI version of synchronize_vqs().
>
> Cc: Thomas Gleixner <[email protected]>
> Cc: Peter Zijlstra <[email protected]>
> Cc: "Paul E. McKenney" <[email protected]>
> Cc: Marc Zyngier <[email protected]>
> Signed-off-by: Jason Wang <[email protected]>
Please add implementations at least for ccw and mmio.
> ---
> drivers/virtio/virtio_pci_common.c | 14 ++++++++++++++
> drivers/virtio/virtio_pci_common.h | 2 ++
> drivers/virtio/virtio_pci_legacy.c | 1 +
> drivers/virtio/virtio_pci_modern.c | 2 ++
> 4 files changed, 19 insertions(+)
>
> diff --git a/drivers/virtio/virtio_pci_common.c
> b/drivers/virtio/virtio_pci_common.c
> index d724f676608b..b78c8bc93a97 100644
> --- a/drivers/virtio/virtio_pci_common.c
> +++ b/drivers/virtio/virtio_pci_common.c
> @@ -37,6 +37,20 @@ void vp_synchronize_vectors(struct virtio_device *vdev)
> synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i));
> }
>
> +void vp_synchronize_vqs(struct virtio_device *vdev)
> +{
> + struct virtio_pci_device *vp_dev = to_vp_device(vdev);
> + int i;
> +
> + if (vp_dev->intx_enabled) {
> + synchronize_irq(vp_dev->pci_dev->irq);
> + return;
> + }
> +
> + for (i = 0; i < vp_dev->msix_vectors; ++i)
> + synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i));
> +}
> +
> /* the notify function used when creating a virt queue */
> bool vp_notify(struct virtqueue *vq)
> {
> diff --git a/drivers/virtio/virtio_pci_common.h
> b/drivers/virtio/virtio_pci_common.h
> index eb17a29fc7ef..2b84d5c1b5bc 100644
> --- a/drivers/virtio/virtio_pci_common.h
> +++ b/drivers/virtio/virtio_pci_common.h
> @@ -105,6 +105,8 @@ static struct virtio_pci_device *to_vp_device(struct
> virtio_device *vdev)
> void vp_synchronize_vectors(struct virtio_device *vdev);
> /* the notify function used when creating a virt queue */
> bool vp_notify(struct virtqueue *vq);
> +/* synchronize with callbacks */
> +void vp_synchronize_vqs(struct virtio_device *vdev);
> /* the config->del_vqs() implementation */
> void vp_del_vqs(struct virtio_device *vdev);
> /* the config->find_vqs() implementation */
> diff --git a/drivers/virtio/virtio_pci_legacy.c
> b/drivers/virtio/virtio_pci_legacy.c
> index 6f4e34ce96b8..5a9e62320edc 100644
> --- a/drivers/virtio/virtio_pci_legacy.c
> +++ b/drivers/virtio/virtio_pci_legacy.c
> @@ -192,6 +192,7 @@ static const struct virtio_config_ops
> virtio_pci_config_ops = {
> .reset = vp_reset,
> .find_vqs = vp_find_vqs,
> .del_vqs = vp_del_vqs,
> + .synchronize_vqs = vp_synchronize_vqs,
> .get_features = vp_get_features,
> .finalize_features = vp_finalize_features,
> .bus_name = vp_bus_name,
> diff --git a/drivers/virtio/virtio_pci_modern.c
> b/drivers/virtio/virtio_pci_modern.c
> index a2671a20ef77..584850389855 100644
> --- a/drivers/virtio/virtio_pci_modern.c
> +++ b/drivers/virtio/virtio_pci_modern.c
> @@ -394,6 +394,7 @@ static const struct virtio_config_ops
> virtio_pci_config_nodev_ops = {
> .reset = vp_reset,
> .find_vqs = vp_modern_find_vqs,
> .del_vqs = vp_del_vqs,
> + .synchronize_vqs = vp_synchronize_vqs,
> .get_features = vp_get_features,
> .finalize_features = vp_finalize_features,
> .bus_name = vp_bus_name,
> @@ -411,6 +412,7 @@ static const struct virtio_config_ops
> virtio_pci_config_ops = {
> .reset = vp_reset,
> .find_vqs = vp_modern_find_vqs,
> .del_vqs = vp_del_vqs,
> + .synchronize_vqs = vp_synchronize_vqs,
> .get_features = vp_get_features,
> .finalize_features = vp_finalize_features,
> .bus_name = vp_bus_name,
> --
> 2.25.1
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