From patchwork Mon Jul 2 13:56:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marvin Liu X-Patchwork-Id: 42056 X-Patchwork-Delegate: maxime.coquelin@redhat.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 0D7BA4CA6; Mon, 2 Jul 2018 08:11:13 +0200 (CEST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id B9A5E1D7 for ; Mon, 2 Jul 2018 08:11:08 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 01 Jul 2018 23:11:08 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,298,1526367600"; d="scan'208";a="237141559" Received: from dpdk-test32.sh.intel.com ([10.67.119.193]) by orsmga005.jf.intel.com with ESMTP; 01 Jul 2018 23:11:07 -0700 From: Marvin Liu To: maxime.coquelin@redhat.com, tiwei.bie@intel.com Cc: zhihong.wang@intel.com, dev@dpdk.org, Marvin Liu Date: Mon, 2 Jul 2018 21:56:35 +0800 Message-Id: <20180702135642.52577-3-yong.liu@intel.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180702135642.52577-1-yong.liu@intel.com> References: <20180702135642.52577-1-yong.liu@intel.com> Subject: [dpdk-dev] [PATCH v5 2/9] net/virtio: add in-order feature bit definition X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" If VIRTIO_F_IN_ORDER has been negotiated, driver will use descriptors in ring order: starting from offset 0 in the table, and wrapping around at the end of the table. Also introduce use_inorder_[rt]x flag for selection of IN_ORDER [RT]x handlers. Signed-off-by: Marvin Liu Reviewed-by: Maxime Coquelin diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h index a28ba8339..77f805df6 100644 --- a/drivers/net/virtio/virtio_pci.h +++ b/drivers/net/virtio/virtio_pci.h @@ -121,6 +121,12 @@ struct virtnet_ctl; #define VIRTIO_TRANSPORT_F_START 28 #define VIRTIO_TRANSPORT_F_END 34 +/* + * Inorder feature indicates that all buffers are used by the device + * in the same order in which they have been made available. + */ +#define VIRTIO_F_IN_ORDER 35 + /* The Guest publishes the used index for which it expects an interrupt * at the end of the avail ring. Host should ignore the avail->flags field. */ /* The Host publishes the avail index for which it expects a kick @@ -233,6 +239,8 @@ struct virtio_hw { uint8_t modern; uint8_t use_simple_rx; uint8_t use_simple_tx; + uint8_t use_inorder_rx; + uint8_t use_inorder_tx; uint16_t port_id; uint8_t mac_addr[ETHER_ADDR_LEN]; uint32_t notify_off_multiplier; diff --git a/drivers/net/virtio/virtio_user_ethdev.c b/drivers/net/virtio/virtio_user_ethdev.c index 1c102ca72..8747cbf94 100644 --- a/drivers/net/virtio/virtio_user_ethdev.c +++ b/drivers/net/virtio/virtio_user_ethdev.c @@ -441,6 +441,8 @@ virtio_user_eth_dev_alloc(struct rte_vdev_device *vdev) hw->modern = 0; hw->use_simple_rx = 0; hw->use_simple_tx = 0; + hw->use_inorder_rx = 0; + hw->use_inorder_tx = 0; hw->virtio_user_dev = dev; return eth_dev; }