diff options
| -rw-r--r-- | drivers/virtio/virtio_pci_modern.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index 05b21e18f46c..0e62820b83ff 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -234,6 +234,34 @@ static void vp_modern_queue_address(struct virtio_pci_modern_device *mdev, &cfg->queue_used_hi); } +/* + * vp_modern_set_queue_enable - enable a virtqueue + * @mdev: the modern virtio-pci device + * @index: the queue index + * @enable: whether the virtqueue is enable or not + */ +static void vp_modern_set_queue_enable(struct virtio_pci_modern_device *mdev, + u16 index, bool enable) +{ + vp_iowrite16(index, &mdev->common->queue_select); + vp_iowrite16(enable, &mdev->common->queue_enable); +} + +/* + * vp_modern_get_queue_enable - enable a virtqueue + * @mdev: the modern virtio-pci device + * @index: the queue index + * + * Returns whether a virtqueue is enabled or not + */ +static bool vp_modern_get_queue_enable(struct virtio_pci_modern_device *mdev, + u16 index) +{ + vp_iowrite16(index, &mdev->common->queue_select); + + return vp_ioread16(&mdev->common->queue_enable); +} + /* virtio config->finalize_features() implementation */ static int vp_finalize_features(struct virtio_device *vdev) { @@ -460,7 +488,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, /* Check if queue is either not available or already active. */ num = vp_ioread16(&cfg->queue_size); - if (!num || vp_ioread16(&cfg->queue_enable)) + if (!num || vp_modern_get_queue_enable(mdev, index)) return ERR_PTR(-ENOENT); if (num & (num - 1)) { @@ -538,7 +566,6 @@ static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs, struct irq_affinity *desc) { struct virtio_pci_device *vp_dev = to_vp_device(vdev); - struct virtio_pci_common_cfg __iomem *cfg = vp_dev->mdev.common; struct virtqueue *vq; int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, desc); @@ -548,10 +575,8 @@ static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs, /* Select and activate all queues. Has to be done last: once we do * this, there's no way to go back except reset. */ - list_for_each_entry(vq, &vdev->vqs, list) { - vp_iowrite16(vq->index, &cfg->queue_select); - vp_iowrite16(1, &cfg->queue_enable); - } + list_for_each_entry(vq, &vdev->vqs, list) + vp_modern_set_queue_enable(&vp_dev->mdev, vq->index, true); return 0; } |