diff options
| author | Eli Cohen <elic@nvidia.com> | 2022-01-05 12:46:37 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-01-15 00:50:53 +0100 |
| commit | aba21aff772b8622e08f07219069be793429a48f (patch) | |
| tree | f16cd770f80aae68d88a878a3da68e5eba243f24 /include | |
| parent | vdpa: Read device configuration only if FEATURES_OK (diff) | |
| download | linux-aba21aff772b8622e08f07219069be793429a48f.tar.xz linux-aba21aff772b8622e08f07219069be793429a48f.zip | |
vdpa: Allow to configure max data virtqueues
Add netlink support to configure the max virtqueue pairs for a device.
At least one pair is required. The maximum is dictated by the device.
Example:
$ vdpa dev add name vdpa-a mgmtdev auxiliary/mlx5_core.sf.1 max_vqp 4
Signed-off-by: Eli Cohen <elic@nvidia.com>
Link: https://lore.kernel.org/r/20220105114646.577224-6-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vdpa.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index ae047fae2603..6d4d7e4fe208 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -101,6 +101,7 @@ struct vdpa_dev_set_config { struct { u8 mac[ETH_ALEN]; u16 mtu; + u16 max_vq_pairs; } net; u64 mask; }; @@ -391,17 +392,29 @@ static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev) static inline int vdpa_reset(struct vdpa_device *vdev) { const struct vdpa_config_ops *ops = vdev->config; + int ret; + mutex_lock(&vdev->cf_mutex); vdev->features_valid = false; - return ops->reset(vdev); + ret = ops->reset(vdev); + mutex_unlock(&vdev->cf_mutex); + return ret; } -static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features) +static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features, bool locked) { const struct vdpa_config_ops *ops = vdev->config; + int ret; + + if (!locked) + mutex_lock(&vdev->cf_mutex); vdev->features_valid = true; - return ops->set_driver_features(vdev, features); + ret = ops->set_driver_features(vdev, features); + if (!locked) + mutex_unlock(&vdev->cf_mutex); + + return ret; } void vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, |