This patch adds two new le16 fields to common configruation structure
to support VIRTIO_F_QUEUE_STATE in PCI tranport layer.
Signed-off-by: Jason Wang <jasow...@redhat.com>
Signed-off-by: Zhu Lingshan <lingshan....@intel.com>
---
transport-pci.tex | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/transport-pci.tex b/transport-pci.tex
index a5c6719..d9bccb0 100644
--- a/transport-pci.tex
+++ b/transport-pci.tex
@@ -321,6 +321,8 @@ \subsubsection{Common configuration structure
layout}\label{sec:Virtio Transport
le64 queue_device; /* read-write */
le16 queue_notif_config_data; /* read-only for driver */
le16 queue_reset; /* read-write */
+ le16 queue_avail_state; /* read-write */
+ le16 queue_used_state; /* read-write */
/* About the administration virtqueue. */
le16 admin_queue_index; /* read-only for driver */
@@ -415,6 +417,16 @@ \subsubsection{Common configuration structure
layout}\label{sec:Virtio Transport
This field exists only if VIRTIO_F_RING_RESET has been
negotiated. (see \ref{sec:Basic Facilities of a Virtio Device /
Virtqueues / Virtqueue Reset}).
+\item[\field{queue_avail_state}]
+ This field is vaild only if VIRTIO_F_QUEUE_STATE has been
+ negotiated. The driver sets and gets the available state of
+ the virtqueue here (see \ref{sec:Virtqueues / Virtqueue State}).
+
+\item[\field{queue_used_state}]
+ This field is vaild only if VIRTIO_F_QUEUE_STATE has been
+ negotiated. The driver sets and gets the used state of the
+ virtqueue here (see \ref{sec:Virtqueues / Virtqueue State}).
+
\item[\field{admin_queue_index}]
The device uses this to report the index of the first administration
virtqueue.
This field is valid only if VIRTIO_F_ADMIN_VQ has been negotiated.
@@ -488,6 +500,9 @@ \subsubsection{Common configuration structure
layout}\label{sec:Virtio Transport
present either a value of 0 or a power of 2 in
\field{queue_size}.
+If VIRTIO_F_QUEUE_STATE has not been negotiated, the device MUST ignore
+any accesses against \field{queue_avail_state} and \field{queue_used_state}.
+
If VIRTIO_F_ADMIN_VQ has been negotiated, the value
\field{admin_queue_index} MUST be equal to, or bigger than
\field{num_queues}; also, \field{admin_queue_num} MUST be
--
2.35.3
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