net: atlantic: adding ethtool physical identification

`ethtool -p eth0` will blink leds helping identify
physical port.

Signed-off-by: Nikita Danilov <ndanilov@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

@@ -153,6 +153,35 @@ static void aq_ethtool_get_strings(struct net_device *ndev,
 	}
 }
 
+static int aq_ethtool_set_phys_id(struct net_device *ndev,
+				  enum ethtool_phys_id_state state)
+{
+	struct aq_nic_s *aq_nic = netdev_priv(ndev);
+	struct aq_hw_s *hw = aq_nic->aq_hw;
+	int ret = 0;
+
+	if (!aq_nic->aq_fw_ops->led_control)
+		return -EOPNOTSUPP;
+
+	mutex_lock(&aq_nic->fwreq_mutex);
+
+	switch (state) {
+	case ETHTOOL_ID_ACTIVE:
+		ret = aq_nic->aq_fw_ops->led_control(hw, AQ_HW_LED_BLINK |
+				 AQ_HW_LED_BLINK << 2 | AQ_HW_LED_BLINK << 4);
+		break;
+	case ETHTOOL_ID_INACTIVE:
+		ret = aq_nic->aq_fw_ops->led_control(hw, AQ_HW_LED_DEFAULT);
+		break;
+	default:
+		break;
+	}
+
+	mutex_unlock(&aq_nic->fwreq_mutex);
+
+	return ret;
+}
+
 static int aq_ethtool_get_sset_count(struct net_device *ndev, int stringset)
 {
 	int ret = 0;
@@ -627,6 +656,7 @@ const struct ethtool_ops aq_ethtool_ops = {
 	.get_regs            = aq_ethtool_get_regs,
 	.get_drvinfo         = aq_ethtool_get_drvinfo,
 	.get_strings         = aq_ethtool_get_strings,
+	.set_phys_id         = aq_ethtool_set_phys_id,
 	.get_rxfh_indir_size = aq_ethtool_get_rss_indir_size,
 	.get_wol             = aq_ethtool_get_wol,
 	.set_wol             = aq_ethtool_set_wol,

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

@@ -119,6 +119,9 @@ struct aq_stats_s {
 
 #define AQ_HW_MULTICAST_ADDRESS_MAX     32U
 
+#define AQ_HW_LED_BLINK    0x2U
+#define AQ_HW_LED_DEFAULT  0x0U
+
 struct aq_hw_s {
 	atomic_t flags;
 	u8 rbl_enabled:1;
@@ -304,6 +307,8 @@ struct aq_fw_ops {
 
 	int (*set_flow_control)(struct aq_hw_s *self);
 
+	int (*led_control)(struct aq_hw_s *self, u32 mode);
+
 	int (*set_power)(struct aq_hw_s *self, unsigned int power_state,
 			 u8 *mac);
 

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

@@ -970,4 +970,5 @@ const struct aq_fw_ops aq_fw_1x_ops = {
 	.set_flow_control = NULL,
 	.send_fw_request = NULL,
 	.enable_ptp = NULL,
+	.led_control = NULL,
 };

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

@@ -17,6 +17,7 @@
 #include "hw_atl_utils.h"
 #include "hw_atl_llh.h"
 
+#define HW_ATL_FW2X_MPI_LED_ADDR         0x31c
 #define HW_ATL_FW2X_MPI_RPC_ADDR         0x334
 
 #define HW_ATL_FW2X_MPI_MBOX_ADDR        0x360
@@ -51,6 +52,8 @@
 #define HAL_ATLANTIC_WOL_FILTERS_COUNT   8
 #define HAL_ATLANTIC_UTILS_FW2X_MSG_WOL  0x0E
 
+#define HW_ATL_FW_VER_LED                0x03010026U
+
 struct __packed fw2x_msg_wol_pattern {
 	u8 mask[16];
 	u32 crc;
@@ -450,6 +453,16 @@ static void aq_fw3x_enable_ptp(struct aq_hw_s *self, int enable)
 	aq_hw_write_reg(self, HW_ATL_FW3X_EXT_CONTROL_ADDR, ptp_opts);
 }
 
+static int aq_fw2x_led_control(struct aq_hw_s *self, u32 mode)
+{
+	if (self->fw_ver_actual < HW_ATL_FW_VER_LED)
+		return -EOPNOTSUPP;
+
+	aq_hw_write_reg(self, HW_ATL_FW2X_MPI_LED_ADDR, mode);
+
+	return 0;
+}
+
 static int aq_fw2x_set_eee_rate(struct aq_hw_s *self, u32 speed)
 {
 	u32 mpi_opts = aq_hw_read_reg(self, HW_ATL_FW2X_MPI_CONTROL2_ADDR);
@@ -557,4 +570,5 @@ const struct aq_fw_ops aq_fw_2x_ops = {
 	.get_flow_control   = aq_fw2x_get_flow_control,
 	.send_fw_request    = aq_fw2x_send_fw_request,
 	.enable_ptp         = aq_fw3x_enable_ptp,
+	.led_control        = aq_fw2x_led_control,
 };