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authorXuan Zhuo <xuanzhuo@linux.alibaba.com>2022-08-01 14:38:51 +0800
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 04:06:40 -0400
commit56bdc06139404b3b06ed75ec99b93445d7e0b8c3 (patch)
treea0241017ee8f4b7c05b6185a6e9e66030d9cf74a /drivers/virtio
parent0b50cece0b7857732d2055f2c77f8730c10f9196 (diff)
virtio_pci: extract the logic of active vq for modern pci
Introduce vp_active_vq() to configure vring to backend after vq attach vring. And configure vq vector if necessary. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-32-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_pci_modern.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index e7e0b8c850f6..9041d9a41b7d 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -176,6 +176,29 @@ static void vp_reset(struct virtio_device *vdev)
vp_synchronize_vectors(vdev);
}
+static int vp_active_vq(struct virtqueue *vq, u16 msix_vec)
+{
+ struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
+ struct virtio_pci_modern_device *mdev = &vp_dev->mdev;
+ unsigned long index;
+
+ index = vq->index;
+
+ /* activate the queue */
+ vp_modern_set_queue_size(mdev, index, virtqueue_get_vring_size(vq));
+ vp_modern_queue_address(mdev, index, virtqueue_get_desc_addr(vq),
+ virtqueue_get_avail_addr(vq),
+ virtqueue_get_used_addr(vq));
+
+ if (msix_vec != VIRTIO_MSI_NO_VECTOR) {
+ msix_vec = vp_modern_queue_vector(mdev, index, msix_vec);
+ if (msix_vec == VIRTIO_MSI_NO_VECTOR)
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
{
return vp_modern_config_vector(&vp_dev->mdev, vector);
@@ -220,32 +243,19 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
vq->num_max = num;
- /* activate the queue */
- vp_modern_set_queue_size(mdev, index, virtqueue_get_vring_size(vq));
- vp_modern_queue_address(mdev, index, virtqueue_get_desc_addr(vq),
- virtqueue_get_avail_addr(vq),
- virtqueue_get_used_addr(vq));
+ err = vp_active_vq(vq, msix_vec);
+ if (err)
+ goto err;
vq->priv = (void __force *)vp_modern_map_vq_notify(mdev, index, NULL);
if (!vq->priv) {
err = -ENOMEM;
- goto err_map_notify;
- }
-
- if (msix_vec != VIRTIO_MSI_NO_VECTOR) {
- msix_vec = vp_modern_queue_vector(mdev, index, msix_vec);
- if (msix_vec == VIRTIO_MSI_NO_VECTOR) {
- err = -EBUSY;
- goto err_assign_vector;
- }
+ goto err;
}
return vq;
-err_assign_vector:
- if (!mdev->notify_base)
- pci_iounmap(mdev->pci_dev, (void __iomem __force *)vq->priv);
-err_map_notify:
+err:
vring_del_virtqueue(vq);
return ERR_PTR(err);
}