[PATCH v2 10/14] net/idpf: add support for mtu configuration

[Junfeng Guo]

Add dev ops mtu_set.

Signed-off-by: Beilei Xing <beilei.x...@intel.com>
Signed-off-by: Junfeng Guo <junfeng....@intel.com>
---
 drivers/net/idpf/idpf_ethdev.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/net/idpf/idpf_ethdev.c b/drivers/net/idpf/idpf_ethdev.c
index b1e2ca21ca..6b3e7eff89 100644
--- a/drivers/net/idpf/idpf_ethdev.c
+++ b/drivers/net/idpf/idpf_ethdev.c
@@ -34,6 +34,7 @@ static int idpf_dev_stop(struct rte_eth_dev *dev);
 static int idpf_dev_close(struct rte_eth_dev *dev);
 static int idpf_dev_info_get(struct rte_eth_dev *dev,
                             struct rte_eth_dev_info *dev_info);
+static int idpf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 
 int
 idpf_dev_link_update(struct rte_eth_dev *dev,
@@ -71,6 +72,7 @@ static const struct eth_dev_ops idpf_eth_dev_ops = {
        .tx_queue_release               = idpf_dev_tx_queue_release,
        .dev_infos_get                  = idpf_dev_info_get,
        .link_update                    = idpf_dev_link_update,
+       .mtu_set                        = idpf_dev_mtu_set,
 };
 
 static int
@@ -151,6 +153,18 @@ idpf_dev_info_get(struct rte_eth_dev *dev, struct 
rte_eth_dev_info *dev_info)
        return 0;
 }
 
+static int
+idpf_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu __rte_unused)
+{
+       /* mtu setting is forbidden if port is start */
+       if (dev->data->dev_started) {
+               PMD_DRV_LOG(ERR, "port must be stopped before configuration");
+               return -EBUSY;
+       }
+
+       return 0;
+}
+
 static int
 idpf_init_vport_req_info(struct rte_eth_dev *dev)
 {
@@ -474,6 +488,13 @@ idpf_dev_start(struct rte_eth_dev *dev)
 
        vport->stopped = 0;
 
+       if (dev->data->mtu > vport->max_mtu) {
+               PMD_DRV_LOG(ERR, "MTU should be less than %d", vport->max_mtu);
+               goto err_mtu;
+       }
+
+       vport->max_pkt_len = dev->data->mtu + IDPF_ETH_OVERHEAD;
+
        if (idpf_start_queues(dev)) {
                PMD_DRV_LOG(ERR, "Failed to start queues");
                goto err_mtu;
-- 
2.25.1