nfp: report auto-negotiation in ethtool

NSP ABI version 0.17 is exposing the autonegotiation settings.
Report whether autoneg is on via ethtool.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_net_ethtool.c

@@ -203,6 +203,10 @@ nfp_net_get_link_ksettings(struct net_device *netdev,
 	cmd->base.speed = SPEED_UNKNOWN;
 	cmd->base.duplex = DUPLEX_UNKNOWN;
 
+	if (nn->eth_port)
+		cmd->base.autoneg = nn->eth_port->aneg != NFP_ANEG_DISABLED ?
+			AUTONEG_ENABLE : AUTONEG_DISABLE;
+
 	if (!netif_carrier_ok(netdev))
 		return 0;
 

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp_eth.c

@@ -63,6 +63,7 @@
 #define NSP_ETH_STATE_RX_ENABLED	BIT_ULL(3)
 #define NSP_ETH_STATE_RATE		GENMASK_ULL(11, 8)
 #define NSP_ETH_STATE_OVRD_CHNG		BIT_ULL(22)
+#define NSP_ETH_STATE_ANEG		GENMASK_ULL(25, 23)
 
 #define NSP_ETH_CTRL_ENABLED		BIT_ULL(1)
 #define NSP_ETH_CTRL_TX_ENABLED		BIT_ULL(2)
@@ -142,6 +143,7 @@ nfp_eth_port_translate(struct nfp_nsp *nsp, const struct eth_table_entry *src,
 		return;
 
 	dst->override_changed = FIELD_GET(NSP_ETH_STATE_OVRD_CHNG, state);
+	dst->aneg = FIELD_GET(NSP_ETH_STATE_ANEG, state);
 }
 
 static void

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp_eth.h

@@ -37,6 +37,14 @@
 #include <linux/types.h>
 #include <linux/if_ether.h>
 
+enum nfp_eth_aneg {
+	NFP_ANEG_AUTO = 0,
+	NFP_ANEG_SEARCH,
+	NFP_ANEG_25G_CONSORTIUM,
+	NFP_ANEG_25G_IEEE,
+	NFP_ANEG_DISABLED,
+};
+
 /**
  * struct nfp_eth_table - ETH table information
  * @count:	number of table entries
@@ -48,6 +56,7 @@
  * @base:	first channel index (within NBI)
  * @lanes:	number of channels
  * @speed:	interface speed (in Mbps)
+ * @aneg:	auto negotiation mode
  * @mac_addr:	interface MAC address
  * @label_port:	port id
  * @label_subport:  id of interface within port (for split ports)
@@ -68,6 +77,8 @@ struct nfp_eth_table {
 		unsigned int lanes;
 		unsigned int speed;
 
+		enum nfp_eth_aneg aneg;
+
 		u8 mac_addr[ETH_ALEN];
 
 		u8 label_port;