From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from ws5-mx01.kavi.com (ws5-mx01.kavi.com [34.193.7.191]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7349DC001DB for ; Mon, 14 Aug 2023 11:29:59 +0000 (UTC) Received: from lists.oasis-open.org (oasis.ws5.connectedcommunity.org [10.110.1.242]) by ws5-mx01.kavi.com (Postfix) with ESMTP id D41FECB120 for ; Mon, 14 Aug 2023 11:29:50 +0000 (UTC) Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id C86C0986400 for ; Mon, 14 Aug 2023 11:29:50 +0000 (UTC) Received: from host09.ws5.connectedcommunity.org (host09.ws5.connectedcommunity.org [10.110.1.97]) by lists.oasis-open.org (Postfix) with QMQP id B9CD298633E; Mon, 14 Aug 2023 11:29:50 +0000 (UTC) Mailing-List: contact virtio-dev-help@lists.oasis-open.org; run by ezmlm List-ID: Sender: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id A00F698638E; Mon, 14 Aug 2023 11:29:49 +0000 (UTC) X-Virus-Scanned: amavisd-new at kavi.com X-IronPort-AV: E=McAfee;i="6600,9927,10801"; a="351613538" X-IronPort-AV: E=Sophos;i="6.01,172,1684825200"; d="scan'208";a="351613538" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10801"; a="803432898" X-IronPort-AV: E=Sophos;i="6.01,172,1684825200"; d="scan'208";a="803432898" From: Zhu Lingshan To: jasowang@redhat.com, mst@redhat.com, eperezma@redhat.com, cohuck@redhat.com Cc: virtio-comment@lists.oasis-open.org, virtio-dev@lists.oasis-open.org, Zhu Lingshan Date: Tue, 15 Aug 2023 03:29:04 +0800 Message-Id: <20230814192904.30062-6-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20230814192904.30062-1-lingshan.zhu@intel.com> References: <20230814192904.30062-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [virtio-dev] [RFC PATCH 5/5] virtio-pci: implement VIRTIO_F_QUEUE_STATE 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 Signed-off-by: Zhu Lingshan --- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org