net: atlantic: A2: phy loopback support

This patch adds the phy loopback support on A2.

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_ethtool.c

@@ -836,6 +836,7 @@ static int aq_ethtool_set_priv_flags(struct net_device *ndev, u32 flags)
 	struct aq_nic_s *aq_nic = netdev_priv(ndev);
 	struct aq_nic_cfg_s *cfg;
 	u32 priv_flags;
+	int ret = 0;
 
 	cfg = aq_nic_get_cfg(aq_nic);
 	priv_flags = cfg->priv_flags;
@@ -857,10 +858,10 @@ static int aq_ethtool_set_priv_flags(struct net_device *ndev, u32 flags)
 			dev_open(ndev, NULL);
 		}
 	} else if ((priv_flags ^ flags) & AQ_HW_LOOPBACK_MASK) {
-		aq_nic_set_loopback(aq_nic);
+		ret = aq_nic_set_loopback(aq_nic);
 	}
 
-	return 0;
+	return ret;
 }
 
 const struct ethtool_ops aq_ethtool_ops = {

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c

@@ -1556,7 +1556,7 @@ static int hw_atl_b0_hw_vlan_ctrl(struct aq_hw_s *self, bool enable)
 	return aq_hw_err_from_flags(self);
 }
 
-static int hw_atl_b0_set_loopback(struct aq_hw_s *self, u32 mode, bool enable)
+int hw_atl_b0_set_loopback(struct aq_hw_s *self, u32 mode, bool enable)
 {
 	switch (mode) {
 	case AQ_HW_LOOPBACK_DMA_SYS:

drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.h

@@ -63,6 +63,7 @@ void hw_atl_b0_hw_init_rx_rss_ctrl1(struct aq_hw_s *self);
 int hw_atl_b0_hw_mac_addr_set(struct aq_hw_s *self, u8 *mac_addr);
 
 int hw_atl_b0_set_fc(struct aq_hw_s *self, u32 fc, u32 tc);
+int hw_atl_b0_set_loopback(struct aq_hw_s *self, u32 mode, bool enable);
 
 int hw_atl_b0_hw_start(struct aq_hw_s *self);
 

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

@@ -843,5 +843,6 @@ const struct aq_hw_ops hw_atl2_ops = {
 	.hw_get_hw_stats             = hw_atl2_utils_get_hw_stats,
 	.hw_get_fw_version           = hw_atl2_utils_get_fw_version,
 	.hw_set_offload              = hw_atl_b0_hw_offload_set,
+	.hw_set_loopback             = hw_atl_b0_set_loopback,
 	.hw_set_fc                   = hw_atl_b0_set_fc,
 };

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

@@ -427,6 +427,28 @@ static u32 aq_a2_fw_get_flow_control(struct aq_hw_s *self, u32 *fcmode)
 	return 0;
 }
 
+static int aq_a2_fw_set_phyloopback(struct aq_hw_s *self, u32 mode, bool enable)
+{
+	struct link_options_s link_options;
+
+	hw_atl2_shared_buffer_get(self, link_options, link_options);
+
+	switch (mode) {
+	case AQ_HW_LOOPBACK_PHYINT_SYS:
+		link_options.internal_loopback = enable;
+		break;
+	case AQ_HW_LOOPBACK_PHYEXT_SYS:
+		link_options.external_loopback = enable;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	hw_atl2_shared_buffer_write(self, link_options, link_options);
+
+	return hw_atl2_shared_buffer_finish_ack(self);
+}
+
 u32 hw_atl2_utils_get_fw_version(struct aq_hw_s *self)
 {
 	struct version_s version;
@@ -468,4 +490,5 @@ const struct aq_fw_ops aq_a2_fw_ops = {
 	.get_eee_rate       = aq_a2_fw_get_eee_rate,
 	.set_flow_control   = aq_a2_fw_set_flow_control,
 	.get_flow_control   = aq_a2_fw_get_flow_control,
+	.set_phyloopback    = aq_a2_fw_set_phyloopback,
 };