From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: [PATCH v2 3/4] net/netvsc: disable multi-queue on older servers Date: Wed, 5 Dec 2018 14:11:58 -0800 Message-ID: <20181205221159.6336-3-stephen@networkplumber.org> References: <1543575881.5400.33.camel@redhat.com> <20181205221159.6336-1-stephen@networkplumber.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: mgamal@redhat.com, Stephen Hemminger , Stephen Hemminger To: dev@dpdk.org Return-path: Received: from mail-pf1-f196.google.com (mail-pf1-f196.google.com [209.85.210.196]) by dpdk.org (Postfix) with ESMTP id 62BBA7CE2 for ; Wed, 5 Dec 2018 23:12:23 +0100 (CET) Received: by mail-pf1-f196.google.com with SMTP id g62so10677430pfd.12 for ; Wed, 05 Dec 2018 14:12:23 -0800 (PST) In-Reply-To: <20181205221159.6336-1-stephen@networkplumber.org> List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" NDIS multi-queue support is only in WS2012 or later. Check the NDIS version to limit to single queue on older versions. Similar code exists in Linux driver. Fixes: 4e9c73e96e83 ("net/netvsc: add Hyper-V network device") Signed-off-by: Stephen Hemminger --- drivers/net/netvsc/hn_ethdev.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c index b330bf3d7255..1256fa399b16 100644 --- a/drivers/net/netvsc/hn_ethdev.c +++ b/drivers/net/netvsc/hn_ethdev.c @@ -732,6 +732,7 @@ eth_hn_dev_init(struct rte_eth_dev *eth_dev) hv->chim_res = &vmbus->resource[HV_SEND_BUF_MAP]; hv->port_id = eth_dev->data->port_id; hv->latency = HN_CHAN_LATENCY_NS; + hv->max_queues = 1; err = hn_parse_args(eth_dev); if (err) @@ -770,6 +771,10 @@ eth_hn_dev_init(struct rte_eth_dev *eth_dev) if (err) goto failed; + /* Multi queue requires later versions of windows server */ + if (hv->nvs_ver < NVS_VERSION_5) + return 0; + max_chan = rte_vmbus_max_channels(vmbus); PMD_INIT_LOG(DEBUG, "VMBus max channels %d", max_chan); if (max_chan <= 0) -- 2.19.2