net: atlantic: A2: half duplex support

This patch adds support for 10M/100M/1G half duplex rates, which are
supported by A2 in additional to full duplex rates supported by A1.
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aquantia/atlantic/aq_common.h

@@ -58,11 +58,14 @@
 #define AQ_NIC_RATE_1G		BIT(4)
 #define AQ_NIC_RATE_100M	BIT(5)
 #define AQ_NIC_RATE_10M		BIT(6)
+#define AQ_NIC_RATE_1G_HALF	BIT(7)
+#define AQ_NIC_RATE_100M_HALF	BIT(8)
+#define AQ_NIC_RATE_10M_HALF	BIT(9)
 
-#define AQ_NIC_RATE_EEE_10G	BIT(7)
-#define AQ_NIC_RATE_EEE_5G	BIT(8)
-#define AQ_NIC_RATE_EEE_2G5	BIT(9)
-#define AQ_NIC_RATE_EEE_1G	BIT(10)
-#define AQ_NIC_RATE_EEE_100M	BIT(11)
+#define AQ_NIC_RATE_EEE_10G	BIT(10)
+#define AQ_NIC_RATE_EEE_5G	BIT(11)
+#define AQ_NIC_RATE_EEE_2G5	BIT(12)
+#define AQ_NIC_RATE_EEE_1G	BIT(13)
+#define AQ_NIC_RATE_EEE_100M	BIT(14)
 
 #endif /* AQ_COMMON_H */

drivers/net/ethernet/aquantia/atlantic/aq_hw.h

 /* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * aQuantia Corporation Network Driver
- * Copyright (C) 2014-2019 aQuantia Corporation. All rights reserved
+/* Atlantic Network Driver
+ *
+ * Copyright (C) 2014-2019 aQuantia Corporation
+ * Copyright (C) 2019-2020 Marvell International Ltd.
  */
 
 /* File aq_hw.h: Declaration of abstract interface for NIC hardware specific
@@ -69,6 +70,7 @@ struct aq_hw_caps_s {
 
 struct aq_hw_link_status_s {
 	unsigned int mbps;
+	bool full_duplex;
 };
 
 struct aq_stats_s {

drivers/net/ethernet/aquantia/atlantic/aq_nic.c

@@ -939,8 +939,11 @@ void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 		cmd->base.port = PORT_FIBRE;
 	else
 		cmd->base.port = PORT_TP;
-	/* This driver supports only 10G capable adapters, so DUPLEX_FULL */
-	cmd->base.duplex = DUPLEX_FULL;
+
+	cmd->base.duplex = DUPLEX_UNKNOWN;
+	if (self->link_status.mbps)
+		cmd->base.duplex = self->link_status.full_duplex ?
+				   DUPLEX_FULL : DUPLEX_HALF;
 	cmd->base.autoneg = self->aq_nic_cfg.is_autoneg;
 
 	ethtool_link_ksettings_zero_link_mode(cmd, supported);
@@ -961,14 +964,26 @@ void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     1000baseT_Full);
 
+	if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_1G_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, supported,
+						     1000baseT_Half);
+
 	if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_100M)
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     100baseT_Full);
 
+	if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_100M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, supported,
+						     100baseT_Half);
+
 	if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_10M)
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     10baseT_Full);
 
+	if (self->aq_nic_cfg.aq_hw_caps->link_speed_msk & AQ_NIC_RATE_10M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, supported,
+						     10baseT_Half);
+
 	if (self->aq_nic_cfg.aq_hw_caps->flow_control) {
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     Pause);
@@ -1004,14 +1019,26 @@ void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     1000baseT_Full);
 
+	if (self->aq_nic_cfg.link_speed_msk & AQ_NIC_RATE_1G_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, advertising,
+						     1000baseT_Half);
+
 	if (self->aq_nic_cfg.link_speed_msk & AQ_NIC_RATE_100M)
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     100baseT_Full);
 
+	if (self->aq_nic_cfg.link_speed_msk & AQ_NIC_RATE_100M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, advertising,
+						     100baseT_Half);
+
 	if (self->aq_nic_cfg.link_speed_msk & AQ_NIC_RATE_10M)
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     10baseT_Full);
 
+	if (self->aq_nic_cfg.link_speed_msk & AQ_NIC_RATE_10M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, advertising,
+						     10baseT_Half);
+
 	if (self->aq_nic_cfg.fc.cur & AQ_NIC_FC_RX)
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     Pause);
@@ -1031,27 +1058,32 @@ void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 int aq_nic_set_link_ksettings(struct aq_nic_s *self,
 			      const struct ethtool_link_ksettings *cmd)
 {
-	u32 speed = 0U;
+	int fduplex = (cmd->base.duplex == DUPLEX_FULL);
+	u32 speed = cmd->base.speed;
 	u32 rate = 0U;
 	int err = 0;
 
+	if (!fduplex && speed > SPEED_1000) {
+		err = -EINVAL;
+		goto err_exit;
+	}
+
 	if (cmd->base.autoneg == AUTONEG_ENABLE) {
 		rate = self->aq_nic_cfg.aq_hw_caps->link_speed_msk;
 		self->aq_nic_cfg.is_autoneg = true;
 	} else {
-		speed = cmd->base.speed;
-
 		switch (speed) {
 		case SPEED_10:
-			rate = AQ_NIC_RATE_10M;
+			rate = fduplex ? AQ_NIC_RATE_10M : AQ_NIC_RATE_10M_HALF;
 			break;
 
 		case SPEED_100:
-			rate = AQ_NIC_RATE_100M;
+			rate = fduplex ? AQ_NIC_RATE_100M
+				       : AQ_NIC_RATE_100M_HALF;
 			break;
 
 		case SPEED_1000:
-			rate = AQ_NIC_RATE_1G;
+			rate = fduplex ? AQ_NIC_RATE_1G : AQ_NIC_RATE_1G_HALF;
 			break;
 
 		case SPEED_2500:

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c

@@ -704,6 +704,7 @@ int hw_atl_utils_mpi_get_link_status(struct aq_hw_s *self)
 			return -EBUSY;
 		}
 	}
+	link_status->full_duplex = true;
 
 	return 0;
 }

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c

@@ -274,6 +274,7 @@ static int aq_fw2x_update_link_status(struct aq_hw_s *self)
 	} else {
 		link_status->mbps = 0;
 	}
+	link_status->full_duplex = true;
 
 	return 0;
 }

drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2.c

@@ -64,8 +64,11 @@ const struct aq_hw_caps_s hw_atl2_caps_aqc113 = {
 			  AQ_NIC_RATE_5G  |
 			  AQ_NIC_RATE_2G5 |
 			  AQ_NIC_RATE_1G  |
+			  AQ_NIC_RATE_1G_HALF   |
 			  AQ_NIC_RATE_100M      |
-			  AQ_NIC_RATE_10M,
+			  AQ_NIC_RATE_100M_HALF |
+			  AQ_NIC_RATE_10M       |
+			  AQ_NIC_RATE_10M_HALF,
 };
 
 static u32 hw_atl2_sem_act_rslvr_get(struct aq_hw_s *self)

drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c

@@ -135,6 +135,10 @@ static void a2_link_speed_mask2fw(u32 speed,
 	link_options->rate_1G = !!(speed & AQ_NIC_RATE_1G);
 	link_options->rate_100M = !!(speed & AQ_NIC_RATE_100M);
 	link_options->rate_10M = !!(speed & AQ_NIC_RATE_10M);
+
+	link_options->rate_1G_hd = !!(speed & AQ_NIC_RATE_1G_HALF);
+	link_options->rate_100M_hd = !!(speed & AQ_NIC_RATE_100M_HALF);
+	link_options->rate_10M_hd = !!(speed & AQ_NIC_RATE_10M_HALF);
 }
 
 static int aq_a2_fw_set_link_speed(struct aq_hw_s *self, u32 speed)
@@ -202,6 +206,7 @@ static int aq_a2_fw_update_link_status(struct aq_hw_s *self)
 	default:
 		self->aq_link_status.mbps = 0;
 	}
+	self->aq_link_status.full_duplex = link_status.duplex;
 
 	return 0;
 }