net: atlantic: A2: report link partner capabilities

This patch adds link partner capabilities reporting support on A2.
In particular, the following capabilities are available for reporting:
* link rate;
* EEE;
* flow control.
Signed-off-by: Dmitry Bogdanov <dbogdanov@marvell.com>
Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -71,6 +71,8 @@ struct aq_hw_caps_s {
 struct aq_hw_link_status_s {
 	unsigned int mbps;
 	bool full_duplex;
+	u32 lp_link_speed_msk;
+	u32 lp_flow_control;
 };
 
 struct aq_stats_s {

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

@@ -935,6 +935,8 @@ static void aq_nic_update_ndev_stats(struct aq_nic_s *self)
 void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 			       struct ethtool_link_ksettings *cmd)
 {
+	u32 lp_link_speed_msk;
+
 	if (self->aq_nic_cfg.aq_hw_caps->media_type == AQ_HW_MEDIA_TYPE_FIBRE)
 		cmd->base.port = PORT_FIBRE;
 	else
@@ -1053,6 +1055,53 @@ void aq_nic_get_link_ksettings(struct aq_nic_s *self,
 		ethtool_link_ksettings_add_link_mode(cmd, advertising, FIBRE);
 	else
 		ethtool_link_ksettings_add_link_mode(cmd, advertising, TP);
+
+	ethtool_link_ksettings_zero_link_mode(cmd, lp_advertising);
+	lp_link_speed_msk = self->aq_hw->aq_link_status.lp_link_speed_msk;
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_10G)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     10000baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_5G)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     5000baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_2G5)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     2500baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_1G)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     1000baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_1G_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     1000baseT_Half);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_100M)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     100baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_100M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     100baseT_Half);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_10M)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     10baseT_Full);
+
+	if (lp_link_speed_msk & AQ_NIC_RATE_10M_HALF)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     10baseT_Half);
+
+	if (self->aq_hw->aq_link_status.lp_flow_control & AQ_NIC_FC_RX)
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     Pause);
+	if (!!(self->aq_hw->aq_link_status.lp_flow_control & AQ_NIC_FC_TX) ^
+	    !!(self->aq_hw->aq_link_status.lp_flow_control & AQ_NIC_FC_RX))
+		ethtool_link_ksettings_add_link_mode(cmd, lp_advertising,
+						     Asym_Pause);
 }
 
 int aq_nic_set_link_ksettings(struct aq_nic_s *self,

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

@@ -164,6 +164,27 @@ static u32 a2_fw_lkp_to_mask(struct lkp_link_caps_s *lkp_link_caps)
 {
 	u32 rate = 0;
 
+	if (lkp_link_caps->rate_10G)
+		rate |= AQ_NIC_RATE_10G;
+	if (lkp_link_caps->rate_5G)
+		rate |= AQ_NIC_RATE_5G;
+	if (lkp_link_caps->rate_N5G)
+		rate |= AQ_NIC_RATE_5GSR;
+	if (lkp_link_caps->rate_2P5G)
+		rate |= AQ_NIC_RATE_2G5;
+	if (lkp_link_caps->rate_1G)
+		rate |= AQ_NIC_RATE_1G;
+	if (lkp_link_caps->rate_1G_hd)
+		rate |= AQ_NIC_RATE_1G_HALF;
+	if (lkp_link_caps->rate_100M)
+		rate |= AQ_NIC_RATE_100M;
+	if (lkp_link_caps->rate_100M_hd)
+		rate |= AQ_NIC_RATE_100M_HALF;
+	if (lkp_link_caps->rate_10M)
+		rate |= AQ_NIC_RATE_10M;
+	if (lkp_link_caps->rate_10M_hd)
+		rate |= AQ_NIC_RATE_10M_HALF;
+
 	if (lkp_link_caps->eee_10G)
 		rate |= AQ_NIC_RATE_EEE_10G;
 	if (lkp_link_caps->eee_5G)
@@ -240,6 +261,7 @@ static int aq_a2_fw_set_state(struct aq_hw_s *self,
 
 static int aq_a2_fw_update_link_status(struct aq_hw_s *self)
 {
+	struct lkp_link_caps_s lkp_link_caps;
 	struct link_status_s link_status;
 
 	hw_atl2_shared_buffer_read(self, link_status, link_status);
@@ -268,6 +290,14 @@ static int aq_a2_fw_update_link_status(struct aq_hw_s *self)
 	}
 	self->aq_link_status.full_duplex = link_status.duplex;
 
+	hw_atl2_shared_buffer_read(self, lkp_link_caps, lkp_link_caps);
+
+	self->aq_link_status.lp_link_speed_msk =
+				 a2_fw_lkp_to_mask(&lkp_link_caps);
+	self->aq_link_status.lp_flow_control =
+				((lkp_link_caps.pause_rx) ? AQ_NIC_FC_RX : 0) |
+				((lkp_link_caps.pause_tx) ? AQ_NIC_FC_TX : 0);
+
 	return 0;
 }