[dpdk-dev] [PATCH v2 18/30] net/dpaa2: add support for config max Rx length in HW

[Sachin Saxena]

From: Hemant Agrawal <hemant.agrawal at nxp.com>

The MC expects the length to be configured without CRC

Signed-off-by: Hemant Agrawal <hemant.agrawal at nxp.com>
---
 drivers/net/dpaa2/dpaa2_ethdev.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c b/drivers/net/dpaa2/dpaa2_ethdev.c
index 721e125b4..a1ef5be6a 100644
--- a/drivers/net/dpaa2/dpaa2_ethdev.c
+++ b/drivers/net/dpaa2/dpaa2_ethdev.c
@@ -418,12 +418,17 @@ dpaa2_eth_dev_configure(struct rte_eth_dev *dev)
 	if (rx_offloads & DEV_RX_OFFLOAD_JUMBO_FRAME) {
 		if (eth_conf->rxmode.max_rx_pkt_len <= DPAA2_MAX_RX_PKT_LEN) {
 			ret = dpni_set_max_frame_length(dpni, CMD_PRI_LOW,
-				priv->token, eth_conf->rxmode.max_rx_pkt_len);
+				priv->token, eth_conf->rxmode.max_rx_pkt_len
+				- RTE_ETHER_CRC_LEN);
 			if (ret) {
 				DPAA2_PMD_ERR(
 					"Unable to set mtu. check config");
 				return ret;
 			}
+			dev->data->mtu =
+				dev->data->dev_conf.rxmode.max_rx_pkt_len -
+				RTE_ETHER_HDR_LEN - RTE_ETHER_CRC_LEN -
+				VLAN_TAG_SIZE;
 		} else {
 			return -1;
 		}
@@ -1201,7 +1206,7 @@ dpaa2_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
 	 * Maximum Ethernet header length
 	 */
 	ret = dpni_set_max_frame_length(dpni, CMD_PRI_LOW, priv->token,
-					frame_size);
+					frame_size - RTE_ETHER_CRC_LEN);
 	if (ret) {
 		DPAA2_PMD_ERR("Setting the max frame length failed");
 		return -1;
@@ -2376,6 +2381,14 @@ dpaa2_dev_init(struct rte_eth_dev *eth_dev)
 		}
 	}
 
+	ret = dpni_set_max_frame_length(dpni_dev, CMD_PRI_LOW, priv->token,
+					RTE_ETHER_MAX_LEN - RTE_ETHER_CRC_LEN
+					+ VLAN_TAG_SIZE);
+	if (ret) {
+		DPAA2_PMD_ERR("Unable to set mtu. check config");
+		goto init_err;
+	}
+
 	RTE_LOG(INFO, PMD, "%s: netdev created\n", eth_dev->data->name);
 	return 0;
 init_err:
-- 
2.17.1