From patchwork Wed Jan 10 01:23:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Wang X-Patchwork-Id: 33277 X-Patchwork-Delegate: yuanhan.liu@linux.intel.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 B70481B16B; Wed, 10 Jan 2018 02:24:54 +0100 (CET) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 1AA721B16B for ; Wed, 10 Jan 2018 02:24:52 +0100 (CET) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Jan 2018 17:24:52 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,337,1511856000"; d="scan'208";a="25905913" Received: from dpdk-xiao-1.sh.intel.com ([10.67.110.153]) by orsmga002.jf.intel.com with ESMTP; 09 Jan 2018 17:24:50 -0800 From: Xiao Wang To: yliu@fridaylinux.org, thomas@monjalon.net Cc: tiwei.bie@intel.com, dev@dpdk.org, stephen@networkplumber.org, maxime.coquelin@redhat.com, Xiao Wang Date: Wed, 10 Jan 2018 09:23:52 +0800 Message-Id: <20180110012356.57456-2-xiao.w.wang@intel.com> X-Mailer: git-send-email 2.15.1 In-Reply-To: <20180110012356.57456-1-xiao.w.wang@intel.com> References: <20180109160918.29173-4-xiao.w.wang@intel.com> <20180110012356.57456-1-xiao.w.wang@intel.com> Subject: [dpdk-dev] [PATCH v10 1/5] net/virtio: make control queue thread-safe 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" The virtio_send_command function may be called from app's configuration routine, but also from an interrupt handler called when live migration is done on the backup side. So this patch makes control queue thread-safe first. Signed-off-by: Xiao Wang Reviewed-by: Maxime Coquelin --- drivers/net/virtio/virtio_ethdev.c | 7 ++++++- drivers/net/virtio/virtio_rxtx.c | 1 + drivers/net/virtio/virtio_rxtx.h | 1 + 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index 21f2131a9..4e613ce30 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -148,6 +148,8 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, PMD_INIT_LOG(ERR, "Control queue is not supported."); return -1; } + + rte_spinlock_lock(&cvq->lock); vq = cvq->vq; head = vq->vq_desc_head_idx; @@ -155,8 +157,10 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, "vq->hw->cvq = %p vq = %p", vq->vq_desc_head_idx, status, vq->hw->cvq, vq); - if ((vq->vq_free_cnt < ((uint32_t)pkt_num + 2)) || (pkt_num < 1)) + if (vq->vq_free_cnt < pkt_num + 2 || pkt_num < 1) { + rte_spinlock_unlock(&cvq->lock); return -1; + } memcpy(cvq->virtio_net_hdr_mz->addr, ctrl, sizeof(struct virtio_pmd_ctrl)); @@ -232,6 +236,7 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl, result = cvq->virtio_net_hdr_mz->addr; + rte_spinlock_unlock(&cvq->lock); return result->status; } diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index 994458ced..265debf20 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -378,6 +378,7 @@ virtio_dev_cq_start(struct rte_eth_dev *dev) struct virtio_hw *hw = dev->data->dev_private; if (hw->cvq && hw->cvq->vq) { + rte_spinlock_init(&hw->cvq->lock); VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq->vq); } } diff --git a/drivers/net/virtio/virtio_rxtx.h b/drivers/net/virtio/virtio_rxtx.h index ca546ccaa..49e9d98ee 100644 --- a/drivers/net/virtio/virtio_rxtx.h +++ b/drivers/net/virtio/virtio_rxtx.h @@ -55,6 +55,7 @@ struct virtnet_ctl { rte_iova_t virtio_net_hdr_mem; /**< hdr for each xmit packet */ uint16_t port_id; /**< Device port identifier. */ const struct rte_memzone *mz; /**< mem zone to populate CTL ring. */ + rte_spinlock_t lock; /**< spinlock for control queue. */ }; int virtio_rxq_vec_setup(struct virtnet_rx *rxvq);