diff options
Diffstat (limited to 'drivers/virtio/virtio_pci_modern.c')
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index bccad1329871..217573f2588d 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -303,6 +303,21 @@ static u16 vp_modern_get_num_queues(struct virtio_pci_modern_device *mdev) return vp_ioread16(&mdev->common->num_queues); } +/* + * vp_modern_get_queue_notify_off - get notification offset for a virtqueue + * @mdev: the modern virtio-pci device + * @index: the queue index + * + * Returns the notification offset for a virtqueue + */ +static u16 vp_modern_get_queue_notify_off(struct virtio_pci_modern_device *mdev, + u16 index) +{ + vp_iowrite16(index, &mdev->common->queue_select); + + return vp_ioread16(&mdev->common->queue_notify_off); +} + /* virtio config->finalize_features() implementation */ static int vp_finalize_features(struct virtio_device *vdev) { @@ -516,7 +531,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, { struct virtio_pci_modern_device *mdev = &vp_dev->mdev; - struct virtio_pci_common_cfg __iomem *cfg = mdev->common; struct virtqueue *vq; u16 num, off; int err; @@ -524,9 +538,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, if (index >= vp_modern_get_num_queues(mdev)) return ERR_PTR(-ENOENT); - /* Select the queue we're interested in */ - vp_iowrite16(index, &cfg->queue_select); - /* Check if queue is either not available or already active. */ num = vp_modern_get_queue_size(mdev, index); if (!num || vp_modern_get_queue_enable(mdev, index)) @@ -538,7 +549,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, } /* get offset of notification word for this vq */ - off = vp_ioread16(&cfg->queue_notify_off); + off = vp_modern_get_queue_notify_off(mdev, index); info->msix_vector = msix_vec; |