Xuan Zhuo
2022-Apr-06 03:43 UTC
[PATCH v9 22/32] virtio_pci: queue_reset: 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 at linux.alibaba.com>
---
drivers/virtio/virtio_pci_modern.c | 46 ++++++++++++++++++------------
1 file changed, 28 insertions(+), 18 deletions(-)
diff --git a/drivers/virtio/virtio_pci_modern.c
b/drivers/virtio/virtio_pci_modern.c
index 86d301f272b8..49a4493732cf 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_disable_cbs(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);
}
--
2.31.0
Jason Wang
2022-Apr-12 06:58 UTC
[PATCH v9 22/32] virtio_pci: queue_reset: extract the logic of active vq for modern pci
? 2022/4/6 ??11:43, Xuan Zhuo ??:> 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 at linux.alibaba.com> > --- > drivers/virtio/virtio_pci_modern.c | 46 ++++++++++++++++++------------ > 1 file changed, 28 insertions(+), 18 deletions(-) > > diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c > index 86d301f272b8..49a4493732cf 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_disable_cbs(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);We need keep this or anything I missed? Thanks> -err_map_notify: > +err: > vring_del_virtqueue(vq); > return ERR_PTR(err); > }