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 7E6665B30 for ; Fri, 2 Nov 2018 10:07:56 +0100 (CET) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CBBC7394D52; Fri, 2 Nov 2018 09:07:55 +0000 (UTC) Received: from localhost (ovpn-116-180.ams2.redhat.com [10.36.116.180]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 708575C1A1; Fri, 2 Nov 2018 09:07:51 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, maxime.coquelin@redhat.com, Gavin.Hu@arm.com Date: Fri, 2 Nov 2018 10:07:40 +0100 Message-Id: <20181102090749.17316-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 02 Nov 2018 09:07:55 +0000 (UTC) Subject: [dpdk-dev] [PATCH v10 0/9] 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: Fri, 02 Nov 2018 09:07:56 -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. v9-v10: * don't mix index into buffer list and descriptors * whitespace and formatting issues * remove "VQ:" in dump virtqueue patch * add extra packed vring struct to virtqueue and change function prototypes and code accordingly * move wrap_counters to virtqueue * make if-conditions for packed and !packed more clear in set_rxtx_funcs() * initialize wrap counters in first patch, instead of rx and tx implementation patch * make virtio-user not supported with packed virtqueues, to be fixed in other patch set? 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 (9): 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 net/virtio-user: disable packed virtqueues when CTRL_VQ enabled drivers/net/virtio/virtio_ethdev.c | 202 +++++-- drivers/net/virtio/virtio_ethdev.h | 5 + drivers/net/virtio/virtio_pci.h | 7 + drivers/net/virtio/virtio_ring.h | 64 +- drivers/net/virtio/virtio_rxtx.c | 561 +++++++++++++++++- .../net/virtio/virtio_user/virtio_user_dev.c | 1 + drivers/net/virtio/virtqueue.c | 22 + drivers/net/virtio/virtqueue.h | 69 ++- 8 files changed, 859 insertions(+), 72 deletions(-) -- 2.17.1