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| author | Parav Pandit <parav@nvidia.com> | 2021-10-26 20:55:12 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-01 05:26:49 -0400 |
| commit | 6dbb1f1687a2ccdfc5b84b0a35bbc6dfefc4de3b (patch) | |
| tree | 8d6e485d373b11b69bdeca1d7c47fbaaea486a3a /include/linux/vdpa.h | |
| parent | c57911ebfbfe745cb95da2bcf547c5bae000590f (diff) | |
| download | linux-6dbb1f1687a2ccdfc5b84b0a35bbc6dfefc4de3b.tar.gz linux-6dbb1f1687a2ccdfc5b84b0a35bbc6dfefc4de3b.tar.bz2 linux-6dbb1f1687a2ccdfc5b84b0a35bbc6dfefc4de3b.zip | |
vdpa: Introduce and use vdpa device get, set config helpers
Subsequent patches enable get and set configuration either
via management device or via vdpa device' config ops.
This requires synchronization between multiple callers to get and set
config callbacks. Features setting also influence the layout of the
configuration fields endianness.
To avoid exposing synchronization primitives to callers, introduce
helper for setting the configuration and use it.
Signed-off-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20211026175519.87795-2-parav@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/linux/vdpa.h')
| -rw-r--r-- | include/linux/vdpa.h | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 30864848950b..267236aab34c 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -386,21 +386,10 @@ static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features) return ops->set_features(vdev, features); } -static inline void vdpa_get_config(struct vdpa_device *vdev, - unsigned int offset, void *buf, - unsigned int len) -{ - const struct vdpa_config_ops *ops = vdev->config; - - /* - * Config accesses aren't supposed to trigger before features are set. - * If it does happen we assume a legacy guest. - */ - if (!vdev->features_valid) - vdpa_set_features(vdev, 0); - ops->get_config(vdev, offset, buf, len); -} - +void vdpa_get_config(struct vdpa_device *vdev, unsigned int offset, + void *buf, unsigned int len); +void vdpa_set_config(struct vdpa_device *dev, unsigned int offset, + const void *buf, unsigned int length); /** * struct vdpa_mgmtdev_ops - vdpa device ops * @dev_add: Add a vdpa device using alloc and register |