This patch defines some requirements for virtio-net to support reset
queues.
Signed-off-by: Xuan Zhuo <xuanz...@linux.alibaba.com>
---
content.tex | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/content.tex b/content.tex
index c6f116c..e293881 100644
--- a/content.tex
+++ b/content.tex
@@ -4337,6 +4337,11 @@ \subsubsection{Control Virtqueue}\label{sec:Device Types
/ Network Device / Devi
\field{virtqueue_pairs} once it has placed the
VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET command in a used buffer.
+After automatic receive steering has completed the selection of the queue, if
+the destination receive queue is in reset state(See \ref{sec:Basic Facilities
of a Virtio Device / Virtqueues / Virtqueue Reset}),
+the device SHOULD re-select a different random queue. If all receive queues are
+in reset state, the device MUST drop the packet.
+
\subparagraph{Legacy Interface: Automatic receive steering in multiqueue
mode}\label{sec:Device Types / Network Device / Device Operation / Control
Virtqueue / Automatic receive steering in multiqueue mode / Legacy Interface:
Automatic receive steering in multiqueue mode}
When using the legacy interface, transitional devices and drivers
MUST format \field{virtqueue_pairs}
@@ -4425,6 +4430,7 @@ \subsubsection{Control Virtqueue}\label{sec:Device Types
/ Network Device / Devi
\item Calculate the hash of the packet as defined in \ref{sec:Device Types /
Network Device / Device Operation / Processing of Incoming Packets / Hash
calculation for incoming packets}.
\item If the device did not calculate the hash for the specific packet, the
device directs the packet to the receiveq specified by
\field{unclassified_queue} of virtio_net_rss_config structure (value of 0
corresponds to receiveq1).
\item Apply \field{indirection_table_mask} to the calculated hash and use the
result as the index in the indirection table to get 0-based number of
destination receiveq (value of 0 corresponds to receiveq1).
+\item If the destination receive queue is in reset state(See \ref{sec:Basic
Facilities of a Virtio Device / Virtqueues / Virtqueue Reset}), the device MUST
drop the packet.
\end{itemize}
\paragraph{Offloads State Configuration}\label{sec:Device Types / Network
Device / Device Operation / Control Virtqueue / Offloads State Configuration}
--
2.31.0
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