ice: refactor PHY type to ethtool link mode

Refactor ice_phy_type_to_ethtool to use phy_type_[low|high]_lkup table to
map PHY type to AQ link speed and ethtool link mode. This removes
complexity and simplifies future changes.
Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice.h

@@ -32,6 +32,7 @@
 #include <linux/pkt_sched.h>
 #include <linux/if_bridge.h>
 #include <linux/ctype.h>
+#include <linux/linkmode.h>
 #include <linux/bpf.h>
 #include <linux/btf.h>
 #include <linux/auxiliary_bus.h>

drivers/net/ethernet/intel/ice/ice_ethtool.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2023 Intel Corporation */
+
+#ifndef _ICE_ETHTOOL_H_
+#define _ICE_ETHTOOL_H_
+
+struct ice_phy_type_to_ethtool {
+	u64 aq_link_speed;
+	u8 link_mode;
+};
+
+/* Macro to make PHY type to Ethtool link mode table entry.
+ * The index is the PHY type.
+ */
+#define ICE_PHY_TYPE(LINK_SPEED, ETHTOOL_LINK_MODE) {\
+	.aq_link_speed = ICE_AQ_LINK_SPEED_##LINK_SPEED, \
+	.link_mode = ETHTOOL_LINK_MODE_##ETHTOOL_LINK_MODE##_BIT, \
+}
+
+/* Lookup table mapping PHY type low to link speed and Ethtool link modes.
+ * Array index corresponds to HW PHY type bit, see
+ * ice_adminq_cmd.h:ICE_PHY_TYPE_LOW_*.
+ */
+static const struct ice_phy_type_to_ethtool
+phy_type_low_lkup[] = {
+	[0] = ICE_PHY_TYPE(100MB, 100baseT_Full),
+	[1] = ICE_PHY_TYPE(100MB, 100baseT_Full),
+	[2] = ICE_PHY_TYPE(1000MB, 1000baseT_Full),
+	[3] = ICE_PHY_TYPE(1000MB, 1000baseX_Full),
+	[4] = ICE_PHY_TYPE(1000MB, 1000baseX_Full),
+	[5] = ICE_PHY_TYPE(1000MB, 1000baseKX_Full),
+	[6] = ICE_PHY_TYPE(1000MB, 1000baseT_Full),
+	[7] = ICE_PHY_TYPE(2500MB, 2500baseT_Full),
+	[8] = ICE_PHY_TYPE(2500MB, 2500baseX_Full),
+	[9] = ICE_PHY_TYPE(2500MB, 2500baseX_Full),
+	[10] = ICE_PHY_TYPE(5GB, 5000baseT_Full),
+	[11] = ICE_PHY_TYPE(5GB, 5000baseT_Full),
+	[12] = ICE_PHY_TYPE(10GB, 10000baseT_Full),
+	[13] = ICE_PHY_TYPE(10GB, 10000baseT_Full),
+	[14] = ICE_PHY_TYPE(10GB, 10000baseSR_Full),
+	[15] = ICE_PHY_TYPE(10GB, 10000baseLR_Full),
+	[16] = ICE_PHY_TYPE(10GB, 10000baseKR_Full),
+	[17] = ICE_PHY_TYPE(10GB, 10000baseT_Full),
+	[18] = ICE_PHY_TYPE(10GB, 10000baseKR_Full),
+	[19] = ICE_PHY_TYPE(25GB, 25000baseCR_Full),
+	[20] = ICE_PHY_TYPE(25GB, 25000baseCR_Full),
+	[21] = ICE_PHY_TYPE(25GB, 25000baseCR_Full),
+	[22] = ICE_PHY_TYPE(25GB, 25000baseCR_Full),
+	[23] = ICE_PHY_TYPE(25GB, 25000baseSR_Full),
+	[24] = ICE_PHY_TYPE(25GB, 25000baseSR_Full),
+	[25] = ICE_PHY_TYPE(25GB, 25000baseKR_Full),
+	[26] = ICE_PHY_TYPE(25GB, 25000baseKR_Full),
+	[27] = ICE_PHY_TYPE(25GB, 25000baseKR_Full),
+	[28] = ICE_PHY_TYPE(25GB, 25000baseCR_Full),
+	[29] = ICE_PHY_TYPE(25GB, 25000baseKR_Full),
+	[30] = ICE_PHY_TYPE(40GB, 40000baseCR4_Full),
+	[31] = ICE_PHY_TYPE(40GB, 40000baseSR4_Full),
+	[32] = ICE_PHY_TYPE(40GB, 40000baseLR4_Full),
+	[33] = ICE_PHY_TYPE(40GB, 40000baseKR4_Full),
+	[34] = ICE_PHY_TYPE(40GB, 40000baseCR4_Full),
+	[35] = ICE_PHY_TYPE(40GB, 40000baseCR4_Full),
+	[36] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[37] = ICE_PHY_TYPE(50GB, 50000baseSR2_Full),
+	[38] = ICE_PHY_TYPE(50GB, 50000baseSR2_Full),
+	[39] = ICE_PHY_TYPE(50GB, 50000baseKR2_Full),
+	[40] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[41] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[42] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[43] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[44] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[45] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[46] = ICE_PHY_TYPE(50GB, 50000baseSR2_Full),
+	[47] = ICE_PHY_TYPE(50GB, 50000baseSR2_Full),
+	[48] = ICE_PHY_TYPE(50GB, 50000baseKR2_Full),
+	[49] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[50] = ICE_PHY_TYPE(50GB, 50000baseCR2_Full),
+	[51] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[52] = ICE_PHY_TYPE(100GB, 100000baseSR4_Full),
+	[53] = ICE_PHY_TYPE(100GB, 100000baseLR4_ER4_Full),
+	[54] = ICE_PHY_TYPE(100GB, 100000baseKR4_Full),
+	[55] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[56] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[57] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[58] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[59] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[60] = ICE_PHY_TYPE(100GB, 100000baseKR4_Full),
+	[61] = ICE_PHY_TYPE(100GB, 100000baseCR2_Full),
+	[62] = ICE_PHY_TYPE(100GB, 100000baseSR2_Full),
+	[63] = ICE_PHY_TYPE(100GB, 100000baseLR4_ER4_Full),
+};
+
+/* Lookup table mapping PHY type high to link speed and Ethtool link modes.
+ * Array index corresponds to HW PHY type bit, see
+ * ice_adminq_cmd.h:ICE_PHY_TYPE_HIGH_*
+ */
+static const struct ice_phy_type_to_ethtool
+phy_type_high_lkup[] = {
+	[0] = ICE_PHY_TYPE(100GB, 100000baseKR2_Full),
+	[1] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[2] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[3] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+	[4] = ICE_PHY_TYPE(100GB, 100000baseCR4_Full),
+};
+
+#endif /* !_ICE_ETHTOOL_H_ */