diff mbox series

[v5,5/5] net/iavf: fix max mtu size packets with vlan tag cannot be received by default

Message ID 20201014091945.1934-6-stevex.yang@intel.com (mailing list archive)
State Changes Requested, archived
Delegated to: Qi Zhang
Headers
Series fix default max mtu size when device configured |

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/iol-broadcom-Performance success Performance Testing PASS
ci/iol-broadcom-Functional success Functional Testing PASS
ci/iol-testing success Testing PASS
ci/iol-intel-Functional success Functional Testing PASS
ci/iol-intel-Performance success Performance Testing PASS
ci/iol-mellanox-Performance success Performance Testing PASS
ci/travis-robot success Travis build: passed
ci/Intel-compilation success Compilation OK

Commit Message

Steve Yang Oct. 14, 2020, 9:19 a.m. UTC 
  when application presets the max rx packet length and expected mtu at
the same time, driver need identify if the preset max frame size can
hold mtu data and Ether overhead completely.

if not, adjust the max frame size via mtu_set ops within dev_configure.

Fixes: 02d212ca3125 ("net/iavf: rename remaining avf strings")

Signed-off-by: SteveX Yang <stevex.yang@intel.com>
---
 drivers/net/iavf/iavf_ethdev.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c
index 93e26c768..8b1cf8f1c 100644
--- a/drivers/net/iavf/iavf_ethdev.c
+++ b/drivers/net/iavf/iavf_ethdev.c
@@ -291,6 +291,8 @@  iavf_dev_configure(struct rte_eth_dev *dev)
 		IAVF_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
 	struct iavf_info *vf =  IAVF_DEV_PRIVATE_TO_VF(ad);
 	struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
+	uint32_t frame_size = dev->data->mtu + IAVF_ETH_OVERHEAD;
+	int ret;
 
 	ad->rx_bulk_alloc_allowed = true;
 	/* Initialize to TRUE. If any of Rx queues doesn't meet the
@@ -302,6 +304,16 @@  iavf_dev_configure(struct rte_eth_dev *dev)
 	if (dev->data->dev_conf.rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG)
 		dev->data->dev_conf.rxmode.offloads |= DEV_RX_OFFLOAD_RSS_HASH;
 
+	/**
+	 * Reset the max frame size via mtu_set ops if preset max frame
+	 * cannot hold MTU data and Ether overhead.
+	 */
+	if (frame_size > dev->data->dev_conf.rxmode.max_rx_pkt_len) {
+		ret = iavf_dev_mtu_set(dev, dev->data->mtu);
+		if (ret != 0)
+			return ret;
+	}
+
 	/* Vlan stripping setting */
 	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN) {
 		if (dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_VLAN_STRIP)