[dpdk-dev] [PATCH v3 12/17] net/ionic: add Flow Control support

[Alfredo Cardigliano <cardigliano@ntop.org>]

Add support for managing Flow Control.

Signed-off-by: Alfredo Cardigliano <cardigliano@ntop.org>
Reviewed-by: Shannon Nelson <snelson@pensando.io>
---
 doc/guides/nics/features/ionic.ini |  1 +
 drivers/net/ionic/ionic_ethdev.c   | 56 ++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/doc/guides/nics/features/ionic.ini b/doc/guides/nics/features/ionic.ini
index 3dd5dab45..05bdb2d98 100644
--- a/doc/guides/nics/features/ionic.ini
+++ b/doc/guides/nics/features/ionic.ini
@@ -12,6 +12,7 @@ Promiscuous mode     = Y
 Allmulticast mode    = Y
 Unicast MAC filter   = Y
 VLAN filter          = Y
+Flow control         = Y
 Linux UIO            = Y
 Linux VFIO           = Y
 x86-64               = Y
diff --git a/drivers/net/ionic/ionic_ethdev.c b/drivers/net/ionic/ionic_ethdev.c
index 60151341a..9872740b7 100644
--- a/drivers/net/ionic/ionic_ethdev.c
+++ b/drivers/net/ionic/ionic_ethdev.c
@@ -29,6 +29,10 @@ static int  ionic_dev_set_link_up(struct rte_eth_dev *dev);
 static int  ionic_dev_set_link_down(struct rte_eth_dev *dev);
 static int  ionic_dev_link_update(struct rte_eth_dev *eth_dev,
 	int wait_to_complete);
+static int  ionic_flow_ctrl_get(struct rte_eth_dev *eth_dev,
+	struct rte_eth_fc_conf *fc_conf);
+static int  ionic_flow_ctrl_set(struct rte_eth_dev *eth_dev,
+	struct rte_eth_fc_conf *fc_conf);
 
 int ionic_logtype_driver;
 
@@ -57,6 +61,8 @@ static const struct eth_dev_ops ionic_eth_dev_ops = {
 	.promiscuous_disable    = ionic_dev_promiscuous_disable,
 	.allmulticast_enable    = ionic_dev_allmulticast_enable,
 	.allmulticast_disable   = ionic_dev_allmulticast_disable,
+	.flow_ctrl_get          = ionic_flow_ctrl_get,
+	.flow_ctrl_set          = ionic_flow_ctrl_set,
 };
 
 /*
@@ -246,6 +252,56 @@ ionic_dev_info_get(struct rte_eth_dev *eth_dev,
 	return 0;
 }
 
+static int
+ionic_flow_ctrl_get(struct rte_eth_dev *eth_dev,
+		struct rte_eth_fc_conf *fc_conf)
+{
+	struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
+	struct ionic_adapter *adapter = lif->adapter;
+	struct ionic_dev *idev = &adapter->idev;
+
+	if (idev->port_info) {
+		fc_conf->autoneg = idev->port_info->config.an_enable;
+
+		if (idev->port_info->config.pause_type)
+			fc_conf->mode = RTE_FC_FULL;
+		else
+			fc_conf->mode = RTE_FC_NONE;
+	}
+
+	return 0;
+}
+
+static int
+ionic_flow_ctrl_set(struct rte_eth_dev *eth_dev,
+		struct rte_eth_fc_conf *fc_conf)
+{
+	struct ionic_lif *lif = IONIC_ETH_DEV_TO_LIF(eth_dev);
+	struct ionic_adapter *adapter = lif->adapter;
+	struct ionic_dev *idev = &adapter->idev;
+	uint8_t pause_type = IONIC_PORT_PAUSE_TYPE_NONE;
+	uint8_t an_enable;
+
+	switch (fc_conf->mode) {
+	case RTE_FC_NONE:
+		pause_type = IONIC_PORT_PAUSE_TYPE_NONE;
+		break;
+	case RTE_FC_FULL:
+		pause_type = IONIC_PORT_PAUSE_TYPE_LINK;
+		break;
+	case RTE_FC_RX_PAUSE:
+	case RTE_FC_TX_PAUSE:
+		return -ENOTSUP;
+	}
+
+	an_enable = fc_conf->autoneg;
+
+	ionic_dev_cmd_port_pause(idev, pause_type);
+	ionic_dev_cmd_port_autoneg(idev, an_enable);
+
+	return 0;
+}
+
 static int
 ionic_dev_configure(struct rte_eth_dev *eth_dev)
 {
-- 
2.17.1