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Subject: [PATCH v3 6/8] transport-ccw: Refer to the vq by its number
Currently specification uses virtqueue index and number interchangeably to refer to the virtqueue. Instead refer to it by its number. Fixes: https://github.com/oasis-tcs/virtio-spec/issues/163 Signed-off-by: Parav Pandit <parav@nvidia.com> --- changelog: v2->v3: - added comment note for queue_select similar to max_queue_size v0->v1: - new patch --- transport-ccw.tex | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/transport-ccw.tex b/transport-ccw.tex index c2e60b6..880b87f 100644 --- a/transport-ccw.tex +++ b/transport-ccw.tex @@ -236,14 +236,18 @@ \subsubsection{Configuring a Virtqueue}\label{sec:Virtio Transport Options / Vir \begin{lstlisting} struct vq_config_block { - be16 index; + be16 queue_select; be16 max_queue_size; }; \end{lstlisting} -The requested number of buffers for queue \field{index} is returned in +The requested number of buffers for queue \field{queue_select} is returned in \field{max_queue_size}. +\begin{note} +\field{queue_select} was previously named as index. +\end{note} + \begin{note} \field{max_queue_size} was previously named as max_num. \end{note} @@ -256,7 +260,7 @@ \subsubsection{Configuring a Virtqueue}\label{sec:Virtio Transport Options / Vir struct vq_info_block { be64 desc; be32 res0; - be16 index; + be16 queue_select; be16 size; be64 driver; be64 device; @@ -265,10 +269,14 @@ \subsubsection{Configuring a Virtqueue}\label{sec:Virtio Transport Options / Vir \field{desc}, \field{driver} and \field{device} contain the guest addresses for the descriptor area, -available area and used area for queue \field{index}, respectively. The actual +available area and used area for queue number \field{queue_select}, respectively. The actual virtqueue size (number of allocated buffers) is transmitted in \field{size}. +\begin{note} +\field{queue_select} was previously named as index. +\end{note} + \begin{note} \field{size} was previously named as num. \end{note} @@ -286,15 +294,20 @@ \subsubsection{Configuring a Virtqueue}\label{sec:Virtio Transport Options / Vir struct vq_info_block_legacy { be64 queue; be32 align; - be16 index; + be16 queue_select; be16 size; }; \end{lstlisting} -\field{queue} contains the guest address for queue \field{index}, +\field{queue} contains the guest address for queue number +\field{queue_select}, \field{size} the number of buffers and \field{align} the alignment. The queue layout follows \ref{sec:Basic Facilities of a Virtio Device / Virtqueues / Legacy Interfaces: A Note on Virtqueue Layout}~\nameref{sec:Basic Facilities of a Virtio Device / Virtqueues / Legacy Interfaces: A Note on Virtqueue Layout}. +\begin{note} +\field{queue_select} was previously named as index. +\end{note} + \begin{note} \field{size} was previously named as num. \end{note} @@ -583,7 +596,7 @@ \subsubsection{Guest->Host Notification}\label{sec:Virtio Transport Options / Vi For example: \begin{lstlisting} info->cookie = do_notify(schid, - virtqueue_get_queue_index(vq), + virtqueue_get_queue_number(vq), info->cookie); \end{lstlisting} \end{note} -- 2.26.2
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