[PATCH 1/2] net/nfp: support getting pause frame switch mode

[Chaoyong He <chaoyong.he@corigine.com>]

From: Zerun Fu <zerun.fu@corigine.com>

Add support for querying current RX/TX pause frame
switch mode from the device.

Signed-off-by: Zerun Fu <zerun.fu@corigine.com>
Reviewed-by: Long Wu <long.wu@corigine.com>
Reviewed-by: Peng Zhang <peng.zhang@corigine.com>
Reviewed-by: Chaoyong He <chaoyong.he@corigine.com>
---
 drivers/net/nfp/nfp_ethdev.c          |  1 +
 drivers/net/nfp/nfp_net_common.c      | 41 +++++++++++++++++++++++++++
 drivers/net/nfp/nfp_net_common.h      |  2 ++
 drivers/net/nfp/nfpcore/nfp_nsp.h     |  2 ++
 drivers/net/nfp/nfpcore/nfp_nsp_eth.c | 11 +++++++
 5 files changed, 57 insertions(+)

diff --git a/drivers/net/nfp/nfp_ethdev.c b/drivers/net/nfp/nfp_ethdev.c
index 4fae2e5540..452e16e126 100644
--- a/drivers/net/nfp/nfp_ethdev.c
+++ b/drivers/net/nfp/nfp_ethdev.c
@@ -428,6 +428,7 @@ static const struct eth_dev_ops nfp_net_eth_dev_ops = {
 	.udp_tunnel_port_add    = nfp_udp_tunnel_port_add,
 	.udp_tunnel_port_del    = nfp_udp_tunnel_port_del,
 	.fw_version_get         = nfp_net_firmware_version_get,
+	.flow_ctrl_get          = nfp_net_flow_ctrl_get,
 };
 
 static inline void
diff --git a/drivers/net/nfp/nfp_net_common.c b/drivers/net/nfp/nfp_net_common.c
index 4efcdff76f..44b2d6dd4f 100644
--- a/drivers/net/nfp/nfp_net_common.c
+++ b/drivers/net/nfp/nfp_net_common.c
@@ -2073,3 +2073,44 @@ nfp_net_stop(struct rte_eth_dev *dev)
 
 	return 0;
 }
+
+static enum rte_eth_fc_mode
+nfp_net_get_pause_mode(struct nfp_eth_table_port *eth_port)
+{
+	enum rte_eth_fc_mode mode;
+
+	if (eth_port->rx_pause_enabled) {
+		if (eth_port->tx_pause_enabled)
+			mode = RTE_ETH_FC_FULL;
+		else
+			mode = RTE_ETH_FC_RX_PAUSE;
+	} else {
+		if (eth_port->tx_pause_enabled)
+			mode = RTE_ETH_FC_TX_PAUSE;
+		else
+			mode = RTE_ETH_FC_NONE;
+	}
+
+	return mode;
+}
+
+int
+nfp_net_flow_ctrl_get(struct rte_eth_dev *dev,
+		struct rte_eth_fc_conf *fc_conf)
+{
+	struct nfp_net_hw *net_hw;
+	struct nfp_eth_table *nfp_eth_table;
+	struct nfp_eth_table_port *eth_port;
+
+	net_hw = nfp_net_get_hw(dev);
+	if (net_hw->pf_dev == NULL)
+		return -EINVAL;
+
+	nfp_eth_table = net_hw->pf_dev->nfp_eth_table;
+	eth_port = &nfp_eth_table->ports[dev->data->port_id];
+
+	/* Currently only RX/TX switch are supported */
+	fc_conf->mode = nfp_net_get_pause_mode(eth_port);
+
+	return 0;
+}
diff --git a/drivers/net/nfp/nfp_net_common.h b/drivers/net/nfp/nfp_net_common.h
index 1f9001c81d..5a65d166e0 100644
--- a/drivers/net/nfp/nfp_net_common.h
+++ b/drivers/net/nfp/nfp_net_common.h
@@ -238,6 +238,8 @@ int nfp_net_firmware_version_get(struct rte_eth_dev *dev, char *fw_version, size
 bool nfp_net_is_valid_nfd_version(struct nfp_net_fw_ver version);
 struct nfp_net_hw *nfp_net_get_hw(const struct rte_eth_dev *dev);
 int nfp_net_stop(struct rte_eth_dev *dev);
+int nfp_net_flow_ctrl_get(struct rte_eth_dev *dev,
+		struct rte_eth_fc_conf *fc_conf);
 
 #define NFP_PRIV_TO_APP_FW_NIC(app_fw_priv)\
 	((struct nfp_app_fw_nic *)app_fw_priv)
diff --git a/drivers/net/nfp/nfpcore/nfp_nsp.h b/drivers/net/nfp/nfpcore/nfp_nsp.h
index fe52dffeb7..dc1eb55a1f 100644
--- a/drivers/net/nfp/nfpcore/nfp_nsp.h
+++ b/drivers/net/nfp/nfpcore/nfp_nsp.h
@@ -139,6 +139,8 @@ struct nfp_eth_table {
 		bool supp_aneg;   /**< Support auto negotiation */
 
 		bool override_changed;  /**< Media reconfig pending */
+		bool rx_pause_enabled;  /**< Switch of RX pause frame */
+		bool tx_pause_enabled;  /**< Switch of TX pause frame */
 
 		uint8_t port_type;    /**< One of %PORT_* */
 		/** Sum of lanes of all subports of this port */
diff --git a/drivers/net/nfp/nfpcore/nfp_nsp_eth.c b/drivers/net/nfp/nfpcore/nfp_nsp_eth.c
index 75f6d40fea..ca8bc8f550 100644
--- a/drivers/net/nfp/nfpcore/nfp_nsp_eth.c
+++ b/drivers/net/nfp/nfpcore/nfp_nsp_eth.c
@@ -33,6 +33,8 @@
 #define NSP_ETH_STATE_ANEG              GENMASK_ULL(25, 23)
 #define NSP_ETH_STATE_FEC               GENMASK_ULL(27, 26)
 #define NSP_ETH_STATE_ACT_FEC           GENMASK_ULL(29, 28)
+#define NSP_ETH_STATE_TX_PAUSE          RTE_BIT64(31)
+#define NSP_ETH_STATE_RX_PAUSE          RTE_BIT64(32)
 
 #define NSP_ETH_CTRL_CONFIGURED         RTE_BIT64(0)
 #define NSP_ETH_CTRL_ENABLED            RTE_BIT64(1)
@@ -186,6 +188,15 @@ nfp_eth_port_translate(struct nfp_nsp *nsp,
 
 	dst->act_fec = FIELD_GET(NSP_ETH_STATE_ACT_FEC, state);
 	dst->supp_aneg = FIELD_GET(NSP_ETH_PORT_SUPP_ANEG, port);
+
+	if (nfp_nsp_get_abi_ver_minor(nsp) < 37) {
+		dst->tx_pause_enabled = true;
+		dst->rx_pause_enabled = true;
+		return;
+	}
+
+	dst->tx_pause_enabled = FIELD_GET(NSP_ETH_STATE_TX_PAUSE, state);
+	dst->rx_pause_enabled = FIELD_GET(NSP_ETH_STATE_RX_PAUSE, state);
 }
 
 static void
-- 
2.39.1