From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marvin Liu Subject: [PATCH v5 2/9] net/virtio: add in-order feature bit definition Date: Mon, 2 Jul 2018 21:56:35 +0800 Message-ID: <20180702135642.52577-3-yong.liu@intel.com> References: <20180702135642.52577-1-yong.liu@intel.com> Cc: zhihong.wang@intel.com, dev@dpdk.org, Marvin Liu To: maxime.coquelin@redhat.com, tiwei.bie@intel.com Return-path: 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) In-Reply-To: <20180702135642.52577-1-yong.liu@intel.com> 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; } -- 2.17.0