From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id A9F7D5681 for ; Wed, 24 Oct 2018 16:32:43 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 378E1308A94E; Wed, 24 Oct 2018 14:32:42 +0000 (UTC) Received: from localhost (ovpn-117-63.ams2.redhat.com [10.36.117.63]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 180CD10018FD; Wed, 24 Oct 2018 14:32:37 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, maxime.coquelin@redhat.com Date: Wed, 24 Oct 2018 16:32:28 +0200 Message-Id: <20181024143236.21271-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Wed, 24 Oct 2018 14:32:42 +0000 (UTC) Subject: [dpdk-dev] [PATCH v9 0/8] implement packed virtqueues 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: , X-List-Received-Date: Wed, 24 Oct 2018 14:32:45 -0000 This is a basic implementation of packed virtqueues as specified in the Virtio 1.1 draft. A compiled version of the current draft is available at https://github.com/oasis-tcs/virtio-docs.git (or as .pdf at https://github.com/oasis-tcs/virtio-docs/blob/master/virtio-v1.1-packed-wd10.pdf A packed virtqueue is different from a split virtqueue in that it consists of only a single descriptor ring that replaces available and used ring, index and descriptor pointers. Each descriptor is readable and writable and has a flags field. These flags will mark if a descriptor is available or used. To detect new available descriptors even after the ring has wrapped, device and driver each have a single-bit wrap counter that is flipped from 0 to 1 and vice versa every time the last descriptor in the ring is used/made available. v8-v9: * fix virtio_ring_free_chain_packed() to handle descriptors correctly in case of out-of-order * fix check in virtqueue_xmit_cleanup_packed() to improve performance v7->v8: * move desc_is_used change to correct patch * remove trailing newline * correct xmit code, flags update and memory barrier * move packed desc init to dedicated function, split and packed variant Jens Freimann (8): net/virtio: vring init for packed queues net/virtio: add packed virtqueue defines net/virtio: add packed virtqueue helpers net/virtio: dump packed virtqueue data net/virtio: implement transmit path for packed queues net/virtio: implement receive path for packed queues net/virtio: add virtio send command packed queue support net/virtio: enable packed virtqueues by default drivers/net/virtio/virtio_ethdev.c | 154 ++++++-- drivers/net/virtio/virtio_ethdev.h | 5 + drivers/net/virtio/virtio_pci.h | 7 + drivers/net/virtio/virtio_ring.h | 105 +++++- drivers/net/virtio/virtio_rxtx.c | 560 +++++++++++++++++++++++++++-- drivers/net/virtio/virtqueue.c | 22 ++ drivers/net/virtio/virtqueue.h | 42 ++- 7 files changed, 841 insertions(+), 54 deletions(-) -- 2.17.1