mdio: Expose 10GBASE-T MDI-X status via ethtool

This is available in a standard MDIO register in 10GBASE-T PHYs.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/net/mdio.c b/drivers/net/mdio.c
index 66483035f683..dc45e9856c35 100644
--- a/drivers/net/mdio.c
+++ b/drivers/net/mdio.c
@@ -296,6 +296,23 @@ void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
                 ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
                                 ecmd->speed == SPEED_10000);
         }
+
+        /* 10GBASE-T MDI/MDI-X */
+        if (ecmd->port == PORT_TP && ecmd->speed == SPEED_10000) {
+                switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
+                                        MDIO_PMA_10GBT_SWAPPOL)) {
+                case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
+                        ecmd->eth_tp_mdix = ETH_TP_MDI;
+                        break;
+                case 0:
+                        ecmd->eth_tp_mdix = ETH_TP_MDI_X;
+                        break;
+                default:
+                        /* It's complicated... */
+                        ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
+                        break;
+                }
+        }
 }
 EXPORT_SYMBOL(mdio45_ethtool_gset_npage);