[dpdk-dev] [PATCH v5 19/23] net/atlantic: support for MTU configuration

[Igor Russkikh <Igor.Russkikh@aquantia.com>]

From: Pavel Belous <Pavel.Belous@aquantia.com>

Add support for updating MTU value.

Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Pavel Belous <Pavel.Belous@aquantia.com>
---
 doc/guides/nics/features/atlantic.ini |  1 +
 drivers/net/atlantic/atl_ethdev.c     | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/doc/guides/nics/features/atlantic.ini b/doc/guides/nics/features/atlantic.ini
index b3ae6fa27c37..cfd6ca6a1323 100644
--- a/doc/guides/nics/features/atlantic.ini
+++ b/doc/guides/nics/features/atlantic.ini
@@ -8,6 +8,7 @@ Speed capabilities   = Y
 Link status          = Y
 Link status event    = Y
 Queue start/stop     = Y
+MTU update           = Y
 Jumbo frame          = Y
 Promiscuous mode     = Y
 Allmulticast mode    = Y
diff --git a/drivers/net/atlantic/atl_ethdev.c b/drivers/net/atlantic/atl_ethdev.c
index 804c02c6f978..7df740553e77 100644
--- a/drivers/net/atlantic/atl_ethdev.c
+++ b/drivers/net/atlantic/atl_ethdev.c
@@ -48,6 +48,8 @@ static void atl_dev_info_get(struct rte_eth_dev *dev,
 
 static const uint32_t *atl_dev_supported_ptypes_get(struct rte_eth_dev *dev);
 
+static int atl_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
+
 /* Flow control */
 static int atl_flow_ctrl_get(struct rte_eth_dev *dev,
 			       struct rte_eth_fc_conf *fc_conf);
@@ -219,6 +221,8 @@ static const struct eth_dev_ops atl_eth_dev_ops = {
 	.dev_infos_get	      = atl_dev_info_get,
 	.dev_supported_ptypes_get = atl_dev_supported_ptypes_get,
 
+	.mtu_set              = atl_dev_mtu_set,
+
 	/* Queue Control */
 	.rx_queue_start	      = atl_rx_queue_start,
 	.rx_queue_stop	      = atl_rx_queue_stop,
@@ -1152,6 +1156,23 @@ atl_set_default_mac_addr(struct rte_eth_dev *dev, struct ether_addr *addr)
 }
 
 static int
+atl_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct rte_eth_dev_info dev_info;
+	uint32_t frame_size = mtu + ETHER_HDR_LEN + ETHER_CRC_LEN;
+
+	atl_dev_info_get(dev, &dev_info);
+
+	if ((mtu < ETHER_MIN_MTU) || (frame_size > dev_info.max_rx_pktlen))
+		return -EINVAL;
+
+	/* update max frame size */
+	dev->data->dev_conf.rxmode.max_rx_pkt_len = frame_size;
+
+	return 0;
+}
+
+static int
 atl_dev_set_mc_addr_list(struct rte_eth_dev *dev,
 			  struct ether_addr *mc_addr_set,
 			  uint32_t nb_mc_addr)
-- 
2.7.4