[dpdk-dev] [PATCH v2 3/4] net/netvsc: disable multi-queue on older servers
Stephen Hemminger
stephen at networkplumber.org
Wed Dec 5 23:11:58 CET 2018
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 <sthemmin at microsoft.com>
---
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
More information about the dev
mailing list