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| author | Feng Liu <feliu@nvidia.com> | 2023-12-19 11:32:41 +0200 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2023-12-19 11:51:31 -0700 |
| commit | 92792ac752aa80d5ee71bc291d90edd06cd76bd1 (patch) | |
| tree | a3ce025550fe594c0a412354c08d9eabb1f2f4dc /include | |
| parent | fd27ef6b44bec26915c5b2b22c13856d9f0ba17a (diff) | |
| download | linux-92792ac752aa80d5ee71bc291d90edd06cd76bd1.tar.gz linux-92792ac752aa80d5ee71bc291d90edd06cd76bd1.tar.bz2 linux-92792ac752aa80d5ee71bc291d90edd06cd76bd1.zip | |
virtio-pci: Introduce admin command sending function
Add support for sending admin command through admin virtqueue interface.
Abort any inflight admin commands once device reset completes. Activate
admin queue when device becomes ready; deactivate on device reset.
To comply to the below specification statement [1], the admin virtqueue
is activated for upper layer users only after setting DRIVER_OK status.
[1] The driver MUST NOT send any buffer available notifications to the
device before setting DRIVER_OK.
Signed-off-by: Feng Liu <feliu@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20231219093247.170936-4-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio.h | 8 | ||||
| -rw-r--r-- | include/uapi/linux/virtio_pci.h | 22 |
2 files changed, 30 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 4cc614a38376..b0201747a263 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -103,6 +103,14 @@ int virtqueue_resize(struct virtqueue *vq, u32 num, int virtqueue_reset(struct virtqueue *vq, void (*recycle)(struct virtqueue *vq, void *buf)); +struct virtio_admin_cmd { + __le16 opcode; + __le16 group_type; + __le64 group_member_id; + struct scatterlist *data_sg; + struct scatterlist *result_sg; +}; + /** * struct virtio_device - representation of a device using virtio * @index: unique position on the virtio bus diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h index 240ddeef7eae..187fd9e34a30 100644 --- a/include/uapi/linux/virtio_pci.h +++ b/include/uapi/linux/virtio_pci.h @@ -223,4 +223,26 @@ struct virtio_pci_cfg_cap { #endif /* VIRTIO_PCI_NO_MODERN */ +/* Admin command status. */ +#define VIRTIO_ADMIN_STATUS_OK 0 + +struct __packed virtio_admin_cmd_hdr { + __le16 opcode; + /* + * 1 - SR-IOV + * 2-65535 - reserved + */ + __le16 group_type; + /* Unused, reserved for future extensions. */ + __u8 reserved1[12]; + __le64 group_member_id; +}; + +struct __packed virtio_admin_cmd_status { + __le16 status; + __le16 status_qualifier; + /* Unused, reserved for future extensions. */ + __u8 reserved2[4]; +}; + #endif |