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authorTianyu Li <tianyu.li@arm.com>2022-06-10 09:30:47 +0000
committerMatthew Smith <mgsmith@netgate.com>2022-07-18 21:22:53 +0000
commit574d99439d34cea6bf01619fca32493249f4dc3a (patch)
tree42fc0be1c1745428841026e65bee3e3031d3e1d4 /src/plugins/dpdk/device/init.c
parent651cc01b642f0fb373ce15533bf820196b1b5d8f (diff)
dpdk: fix mlx5 dpdk init with no-multi-seg
Build vpp with MLX DPDK PMD, make DPDK_MLX4_PMD=y DPDK_MLX5_PMD=y DPDK_MLX5_COMMON_PMD=y build-release With no-multi-seg in startup.conf, Mellanox NIC init failed with following message, rte_eth_rx_queue_setup[port:2, errno:-12]: Unknown error -12 mlx5_net: port 2 Rx queue 0: Scatter offload is not configured and no enough mbuf space(2176) to contain the maximum RX packet length(2065) with head-room(128) In Mellanox NIC PMD driver, 'di.max_rx_pktlen' is returned as 65536, and 'di.max_mtu' is returned as 65535, which makes the driver_frame_overhead logic not suitable for Mellanox NICs. So skip the logic code if MAX_MTU is returned as 65535. Type: fix Fixes: 1cd0e5dd533f ("vnet: distinguish between max_frame_size and MTU") Signed-off-by: Tianyu Li <tianyu.li@arm.com> Change-Id: I027b76b8d07fb453015b8eebb36d160b4bc8df9c
Diffstat (limited to 'src/plugins/dpdk/device/init.c')
-rw-r--r--src/plugins/dpdk/device/init.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index 0cc8e12357b..4863c8c12b6 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -402,7 +402,8 @@ dpdk_lib_init (dpdk_main_t * dm)
q = di.max_rx_pktlen - di.max_mtu;
/* attempt to protect from bogus value provided by pmd */
- if (q < (2 * xd->driver_frame_overhead) && q > 0)
+ if (q < (2 * xd->driver_frame_overhead) && q > 0 &&
+ di.max_mtu != UINT16_MAX)
xd->driver_frame_overhead = q;
dpdk_log_debug ("[%u] min_mtu: %u, max_mtu: %u, min_rx_bufsize: %u, "
"max_rx_pktlen: %u, max_lro_pkt_size: %u",