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Subject: [PATCH v2 2/4] virtio-blk: add support for VIRTIO_F_ADMIN_VQ
Set the relevant index in case of VIRTIO_F_ADMIN_VQ negotiation. Reviewed-by: Parav Pandit <parav@nvidia.com> Signed-off-by: Max Gurtovoy <mgurtovoy@nvidia.com> --- content.tex | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/content.tex b/content.tex index c524fab..f5f95fb 100644 --- a/content.tex +++ b/content.tex @@ -4517,10 +4517,19 @@ \subsection{Device ID}\label{sec:Device Types / Block Device / Device ID} 2 \subsection{Virtqueues}\label{sec:Device Types / Block Device / Virtqueues} + if VIRTIO_F_ADMIN_VQ is not negotiated, the request queues layout is as follows: \begin{description} \item[0] requestq1 \item[\ldots] \item[N-1] requestqN +\end{description} + + If VIRTIO_F_ADMIN_VQ is negotiated, the queues layout is as follows: +\begin{description} +\item[0] requestq1 +\item[\ldots] +\item[N-1] requestqN +\item[N] adminq \end{description} N=1 if VIRTIO_BLK_F_MQ is not negotiated, otherwise N is set by @@ -4589,7 +4598,7 @@ \subsection{Device configuration layout}\label{sec:Device Types / Block Device / bits as indicated above. The field \field{num_queues} only exists if VIRTIO_BLK_F_MQ is set. This field specifies -the number of queues. +the number of request queues. This field doesn't account admin virtqueue. The parameters in the configuration space of the device \field{max_discard_sectors} \field{discard_sector_alignment} are expressed in 512-byte units if the -- 2.21.0
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