[dpdk-dev] [PATCH v5 08/29] net/i40e: enable VF MTU change

[Ferruh Yigit <ferruh.yigit@intel.com>]

From: Qi Zhang <qi.z.zhang@intel.com>

This patch implement mtu_set ops for i40e VF.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
---
 drivers/net/i40e/i40e_ethdev_vf.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index 12da0ec..bce01d0 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -151,6 +151,7 @@ static int i40evf_dev_rss_hash_update(struct rte_eth_dev *dev,
 				      struct rte_eth_rss_conf *rss_conf);
 static int i40evf_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 					struct rte_eth_rss_conf *rss_conf);
+static int i40evf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 static int
 i40evf_dev_rx_queue_intr_enable(struct rte_eth_dev *dev, uint16_t queue_id);
 static int
@@ -225,6 +226,7 @@ static const struct eth_dev_ops i40evf_eth_dev_ops = {
 	.reta_query           = i40evf_dev_rss_reta_query,
 	.rss_hash_update      = i40evf_dev_rss_hash_update,
 	.rss_hash_conf_get    = i40evf_dev_rss_hash_conf_get,
+	.mtu_set              = i40evf_dev_mtu_set,
 };
 
 /*
@@ -2641,3 +2643,34 @@ i40evf_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
 
 	return 0;
 }
+
+static int
+i40evf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct i40e_vf *vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
+	struct rte_eth_dev_data *dev_data = vf->dev_data;
+	uint32_t frame_size = mtu + ETHER_HDR_LEN
+			      + ETHER_CRC_LEN + I40E_VLAN_TAG_SIZE;
+	int ret = 0;
+
+	/* check if mtu is within the allowed range */
+	if ((mtu < ETHER_MIN_MTU) || (frame_size > I40E_FRAME_SIZE_MAX))
+		return -EINVAL;
+
+	/* mtu setting is forbidden if port is start */
+	if (dev_data->dev_started) {
+		PMD_DRV_LOG(ERR,
+			    "port %d must be stopped before configuration\n",
+			    dev_data->port_id);
+		return -EBUSY;
+	}
+
+	if (frame_size > ETHER_MAX_LEN)
+		dev_data->dev_conf.rxmode.jumbo_frame = 1;
+	else
+		dev_data->dev_conf.rxmode.jumbo_frame = 0;
+
+	dev_data->dev_conf.rxmode.max_rx_pkt_len = frame_size;
+
+	return ret;
+}
-- 
2.9.3