On Thu, Feb 10, 2022 at 5:06 PM Xuan Zhuo <[email protected]> wrote:
>
> This patch defines some requirements for virtio-net to support reset
> queues.
>
> Signed-off-by: Xuan Zhuo <[email protected]>
> ---
> conformance.tex | 1 +
> content.tex | 12 ++++++++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/conformance.tex b/conformance.tex
> index 42f8537..3656da5 100644
> --- a/conformance.tex
> +++ b/conformance.tex
> @@ -396,6 +396,7 @@ \section{Conformance Targets}\label{sec:Conformance /
> Conformance Targets}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Packet Transmission}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Setting Up Receive Buffers}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Processing of Incoming Packets}
> +\item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Reset Virtqueue}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Control Virtqueue / Packet Receive Filtering}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Control Virtqueue / Setting MAC Address Filtering}
> \item \ref{devicenormative:Device Types / Network Device / Device Operation
> / Control Virtqueue / Gratuitous Packet Sending}
> diff --git a/content.tex b/content.tex
> index c6f116c..af86689 100644
> --- a/content.tex
> +++ b/content.tex
> @@ -4000,6 +4000,18 @@ \subsubsection{Processing of Incoming
> Packets}\label{sec:Device Types / Network
> #define VIRTIO_NET_HASH_REPORT_UDPv6_EX 9
> \end{lstlisting}
>
> +\subsubsection{Reset Virtqueue}\label{sec:Device Types / Network Device /
> Device Operation / Reset Virtqueue}
> +
> +The receive and transmission virtqueues and the control virtqueue can
> implement
> +reset based on Virtqueue Reset (See \ref{sec:Basic Facilities of a Virtio
> Device / Virtqueues / Virtqueue Reset}).
> +
> +\devicenormative{\paragraph}{Gratuitous Packet Sending}{Device Types /
> Network Device / Device Operation / Reset Virtqueue}
> +
> +After automatic receive steering or RSS receive steering has completed the
> +selection of the queue, if the destination receive queue is in reset state,
> +the device SHOULD re-select a different random queue.
This seems break the semantics of the indirection table? For RSS, I
think we probably need to drop.
Thanks
> If all receive queues are
> +in reset state, the device can drop the packet.
> +
> \subsubsection{Control Virtqueue}\label{sec:Device Types / Network Device /
> Device Operation / Control Virtqueue}
>
> The driver uses the control virtqueue (if VIRTIO_NET_F_CTRL_VQ is
> --
> 2.31.0
>
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