diff options
| author | Jason Wang <jasowang@redhat.com> | 2021-01-04 14:54:52 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-02-23 07:52:57 -0500 |
| commit | ed2a73dbab138b1af8501d48b4f57fa9be68f43c (patch) | |
| tree | 5787f5afd7c365f253de7b8514134413528aa9f1 /drivers/virtio | |
| parent | 0b0177089c60236b6a785346cfaab081acd9be26 (diff) | |
| download | linux-ed2a73dbab138b1af8501d48b4f57fa9be68f43c.tar.bz2 | |
virtio-pci-modern: introduce vp_modern_generation()
This patch introduces vp_modern_generation() to get device generation.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210104065503.199631-9-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index cb14fc334a9c..a128e5814045 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -289,15 +289,26 @@ static void vp_set(struct virtio_device *vdev, unsigned offset, } } -static u32 vp_generation(struct virtio_device *vdev) +/* + * vp_modern_generation - get the device genreation + * @mdev: the modern virtio-pci device + * + * Returns the genreation read from device + */ +static u32 vp_modern_generation(struct virtio_pci_modern_device *mdev) { - struct virtio_pci_device *vp_dev = to_vp_device(vdev); - struct virtio_pci_modern_device *mdev = &vp_dev->mdev; struct virtio_pci_common_cfg __iomem *cfg = mdev->common; return vp_ioread8(&cfg->config_generation); } +static u32 vp_generation(struct virtio_device *vdev) +{ + struct virtio_pci_device *vp_dev = to_vp_device(vdev); + + return vp_modern_generation(&vp_dev->mdev); +} + /* * vp_modern_get_status - get the device status * @mdev: the modern virtio-pci device |