[PATCH v9 11/14] 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>
---
 doc/guides/nics/features/idpf.ini |  1 +
 drivers/net/idpf/idpf_ethdev.c    | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/doc/guides/nics/features/idpf.ini 
b/doc/guides/nics/features/idpf.ini
index 36dec39b9f..ee3f6e7c6f 100644
--- a/doc/guides/nics/features/idpf.ini
+++ b/doc/guides/nics/features/idpf.ini
@@ -10,6 +10,7 @@
 Queue start/stop     = Y
 Runtime Rx queue setup = Y
 Runtime Tx queue setup = Y
+MTU update           = Y
 TSO                  = P
 L3 checksum offload  = P
 L4 checksum offload  = P
diff --git a/drivers/net/idpf/idpf_ethdev.c b/drivers/net/idpf/idpf_ethdev.c
index cc1cfe402b..803c0d7e12 100644
--- a/drivers/net/idpf/idpf_ethdev.c
+++ b/drivers/net/idpf/idpf_ethdev.c
@@ -32,6 +32,7 @@ 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);
 static void idpf_adapter_rel(struct idpf_adapter *adapter);
 
 int
@@ -70,6 +71,7 @@ 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
@@ -83,6 +85,9 @@ idpf_dev_info_get(struct rte_eth_dev *dev, struct 
rte_eth_dev_info *dev_info)
        dev_info->min_rx_bufsize = IDPF_MIN_BUF_SIZE;
        dev_info->max_rx_pktlen = IDPF_MAX_FRAME_SIZE;
 
+       dev_info->max_mtu = dev_info->max_rx_pktlen - IDPF_ETH_OVERHEAD;
+       dev_info->min_mtu = RTE_ETHER_MIN_MTU;
+
        dev_info->flow_type_rss_offloads = IDPF_RSS_OFFLOAD_ALL;
        dev_info->max_mac_addrs = IDPF_NUM_MACADDR_MAX;
        dev_info->dev_capa = RTE_ETH_DEV_CAPA_RUNTIME_RX_QUEUE_SETUP |
@@ -131,6 +136,18 @@ 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)
 {
@@ -429,6 +446,13 @@ 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;
-- 
2.34.1