mlxsw: Add support for 800Gbps link modes

Add support for 800Gbps speed, link modes of 100Gbps per lane.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/reg.h

@@ -4620,6 +4620,7 @@ MLXSW_ITEM32(reg, ptys, an_status, 0x04, 28, 4);
 #define MLXSW_REG_PTYS_EXT_ETH_SPEED_100GAUI_2_100GBASE_CR2_KR2		BIT(10)
 #define MLXSW_REG_PTYS_EXT_ETH_SPEED_200GAUI_4_200GBASE_CR4_KR4		BIT(12)
 #define MLXSW_REG_PTYS_EXT_ETH_SPEED_400GAUI_8				BIT(15)
+#define MLXSW_REG_PTYS_EXT_ETH_SPEED_800GAUI_8				BIT(19)
 
 /* reg_ptys_ext_eth_proto_cap
  * Extended Ethernet port supported speeds and protocols.

drivers/net/ethernet/mellanox/mlxsw/spectrum_ethtool.c

@@ -1672,6 +1672,19 @@ mlxsw_sp2_mask_ethtool_400gaui_8[] = {
 #define MLXSW_SP2_MASK_ETHTOOL_400GAUI_8_LEN \
 	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_400gaui_8)
 
+static const enum ethtool_link_mode_bit_indices
+mlxsw_sp2_mask_ethtool_800gaui_8[] = {
+	ETHTOOL_LINK_MODE_800000baseCR8_Full_BIT,
+	ETHTOOL_LINK_MODE_800000baseKR8_Full_BIT,
+	ETHTOOL_LINK_MODE_800000baseDR8_Full_BIT,
+	ETHTOOL_LINK_MODE_800000baseDR8_2_Full_BIT,
+	ETHTOOL_LINK_MODE_800000baseSR8_Full_BIT,
+	ETHTOOL_LINK_MODE_800000baseVR8_Full_BIT,
+};
+
+#define MLXSW_SP2_MASK_ETHTOOL_800GAUI_8_LEN \
+	ARRAY_SIZE(mlxsw_sp2_mask_ethtool_800gaui_8)
+
 #define MLXSW_SP_PORT_MASK_WIDTH_1X	BIT(0)
 #define MLXSW_SP_PORT_MASK_WIDTH_2X	BIT(1)
 #define MLXSW_SP_PORT_MASK_WIDTH_4X	BIT(2)
@@ -1820,6 +1833,14 @@ static const struct mlxsw_sp2_port_link_mode mlxsw_sp2_port_link_mode[] = {
 		.speed		= SPEED_400000,
 		.width		= 8,
 	},
+	{
+		.mask		= MLXSW_REG_PTYS_EXT_ETH_SPEED_800GAUI_8,
+		.mask_ethtool	= mlxsw_sp2_mask_ethtool_800gaui_8,
+		.m_ethtool_len	= MLXSW_SP2_MASK_ETHTOOL_800GAUI_8_LEN,
+		.mask_sup_width	= MLXSW_SP_PORT_MASK_WIDTH_8X,
+		.speed		= SPEED_800000,
+		.width		= 8,
+	},
 };
 
 #define MLXSW_SP2_PORT_LINK_MODE_LEN ARRAY_SIZE(mlxsw_sp2_port_link_mode)