net: phy: Add interface types for 50G and 100G

Add support for 802.3cd based interface types 50GBASE-R and 100GBASE-P.
This choice in naming is based on section 135 of the 802.3-2022 IEEE
Standard.

In addition it is adding support for what I am referring to as LAUI
which is based on annex 135C of the IEEE Standard, and shares many
similarities with the 25/50G consortium. The main difference between the
two is that IEEE spec refers to LAUI as the AUI before the RS(544/514) FEC,
whereas the 25/50G use this lane and frequency combination after going
through RS(528/514), Base-R or no FEC at all.

Signed-off-by: Alexander Duyck <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

Author: ahduyck

drivers/net/phy/phy-core.c

@@ -142,6 +142,9 @@ int phy_interface_num_ports(phy_interface_t interface)
 	case PHY_INTERFACE_MODE_RXAUI:
 	case PHY_INTERFACE_MODE_XAUI:
 	case PHY_INTERFACE_MODE_1000BASEKX:
+	case PHY_INTERFACE_MODE_50GBASER:
+	case PHY_INTERFACE_MODE_LAUI:
+	case PHY_INTERFACE_MODE_100GBASEP:
 		return 1;
 	case PHY_INTERFACE_MODE_QSGMII:
 	case PHY_INTERFACE_MODE_QUSGMII:

drivers/net/phy/phy_caps.c

@@ -351,6 +351,15 @@ unsigned long phy_caps_from_interface(phy_interface_t interface)
 		link_caps |= BIT(LINK_CAPA_40000FD);
 		break;
 
+	case PHY_INTERFACE_MODE_50GBASER:
+	case PHY_INTERFACE_MODE_LAUI:
+		link_caps |= BIT(LINK_CAPA_50000FD);
+		break;
+
+	case PHY_INTERFACE_MODE_100GBASEP:
+		link_caps |= BIT(LINK_CAPA_100000FD);
+		break;
+
 	case PHY_INTERFACE_MODE_INTERNAL:
 		link_caps |= LINK_CAPA_ALL;
 		break;

drivers/net/phy/phylink.c

@@ -127,6 +127,9 @@ do {									\
 #endif
 
 static const phy_interface_t phylink_sfp_interface_preference[] = {
+	PHY_INTERFACE_MODE_100GBASEP,
+	PHY_INTERFACE_MODE_50GBASER,
+	PHY_INTERFACE_MODE_LAUI,
 	PHY_INTERFACE_MODE_25GBASER,
 	PHY_INTERFACE_MODE_USXGMII,
 	PHY_INTERFACE_MODE_10GBASER,
@@ -274,6 +277,13 @@ static int phylink_interface_max_speed(phy_interface_t interface)
 	case PHY_INTERFACE_MODE_XLGMII:
 		return SPEED_40000;
 
+	case PHY_INTERFACE_MODE_50GBASER:
+	case PHY_INTERFACE_MODE_LAUI:
+		return SPEED_50000;
+
+	case PHY_INTERFACE_MODE_100GBASEP:
+		return SPEED_100000;
+
 	case PHY_INTERFACE_MODE_INTERNAL:
 	case PHY_INTERFACE_MODE_NA:
 	case PHY_INTERFACE_MODE_MAX:
@@ -798,6 +808,9 @@ static int phylink_parse_mode(struct phylink *pl,
 		case PHY_INTERFACE_MODE_10GKR:
 		case PHY_INTERFACE_MODE_10GBASER:
 		case PHY_INTERFACE_MODE_XLGMII:
+		case PHY_INTERFACE_MODE_50GBASER:
+		case PHY_INTERFACE_MODE_LAUI:
+		case PHY_INTERFACE_MODE_100GBASEP:
 			caps = ~(MAC_SYM_PAUSE | MAC_ASYM_PAUSE);
 			caps = phylink_get_capabilities(pl->link_config.interface, caps,
 							RATE_MATCH_NONE);

include/linux/phy.h

@@ -103,6 +103,9 @@ extern const int phy_basic_ports_array[3];
  * @PHY_INTERFACE_MODE_QUSGMII: Quad Universal SGMII
  * @PHY_INTERFACE_MODE_1000BASEKX: 1000Base-KX - with Clause 73 AN
  * @PHY_INTERFACE_MODE_10G_QXGMII: 10G-QXGMII - 4 ports over 10G USXGMII
+ * @PHY_INTERFACE_MODE_50GBASER: 50GBase-R - with Clause 134 FEC
+ * @PHY_INTERFACE_MODE_LAUI: 50 Gigabit Attachment Unit Interface
+ * @PHY_INTERFACE_MODE_100GBASEP: 100GBase-P - with Clause 134 FEC
  * @PHY_INTERFACE_MODE_MAX: Book keeping
  *
  * Describes the interface between the MAC and PHY.
@@ -144,6 +147,9 @@ typedef enum {
 	PHY_INTERFACE_MODE_QUSGMII,
 	PHY_INTERFACE_MODE_1000BASEKX,
 	PHY_INTERFACE_MODE_10G_QXGMII,
+	PHY_INTERFACE_MODE_50GBASER,
+	PHY_INTERFACE_MODE_LAUI,
+	PHY_INTERFACE_MODE_100GBASEP,
 	PHY_INTERFACE_MODE_MAX,
 } phy_interface_t;
 
@@ -260,6 +266,12 @@ static inline const char *phy_modes(phy_interface_t interface)
 		return "qusgmii";
 	case PHY_INTERFACE_MODE_10G_QXGMII:
 		return "10g-qxgmii";
+	case PHY_INTERFACE_MODE_50GBASER:
+		return "50gbase-r";
+	case PHY_INTERFACE_MODE_LAUI:
+		return "laui";
+	case PHY_INTERFACE_MODE_100GBASEP:
+		return "100gbase-p";
 	default:
 		return "unknown";
 	}