net: ngbe: add Wake on Lan support

Implement ethtool_ops get_wol and set_wol.
Implement Wake-on-LAN support.

Wol requires hardware board support which use sub id
to identify.
Magic packets are checked by fw, for now just support
WAKE_MAGIC.

Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/wangxun/libwx/wx_hw.c

@@ -1501,7 +1501,7 @@ static void wx_restore_vlan(struct wx *wx)
  *
  * Configure the Rx unit of the MAC after a reset.
  **/
-static void wx_configure_rx(struct wx *wx)
+void wx_configure_rx(struct wx *wx)
 {
 	u32 psrtype, i;
 	int ret;
@@ -1545,6 +1545,7 @@ static void wx_configure_rx(struct wx *wx)
 	wx_enable_rx(wx);
 	wx_enable_sec_rx_path(wx);
 }
+EXPORT_SYMBOL(wx_configure_rx);
 
 static void wx_configure_isb(struct wx *wx)
 {

drivers/net/ethernet/wangxun/libwx/wx_hw.h

@@ -25,6 +25,7 @@ void wx_disable_rx(struct wx *wx);
 void wx_set_rx_mode(struct net_device *netdev);
 int wx_change_mtu(struct net_device *netdev, int new_mtu);
 void wx_disable_rx_queue(struct wx *wx, struct wx_ring *ring);
+void wx_configure_rx(struct wx *wx);
 void wx_configure(struct wx *wx);
 void wx_start_hw(struct wx *wx);
 int wx_disable_pcie_master(struct wx *wx);

drivers/net/ethernet/wangxun/libwx/wx_type.h

@@ -160,6 +160,10 @@
 #define WX_PSR_LAN_FLEX_DW_H(_i)     (0x15C04 + ((_i) * 16))
 #define WX_PSR_LAN_FLEX_MSK(_i)      (0x15C08 + ((_i) * 16))
 
+#define WX_PSR_WKUP_CTL              0x15B80
+/* Wake Up Filter Control Bit */
+#define WX_PSR_WKUP_CTL_MAG          BIT(1) /* Magic Packet Wakeup Enable */
+
 /* vlan tbl */
 #define WX_PSR_VLAN_TBL(_i)          (0x16000 + ((_i) * 4))
 
@@ -846,7 +850,7 @@ struct wx {
 	int duplex;
 	struct phy_device *phydev;
 
-	bool wol_enabled;
+	bool wol_hw_supported;
 	bool ncsi_enabled;
 	bool gpio_ctrl;
 	raw_spinlock_t gpio_lock;

drivers/net/ethernet/wangxun/ngbe/ngbe_ethtool.c

@@ -6,14 +6,49 @@
 #include <linux/netdevice.h>
 
 #include "../libwx/wx_ethtool.h"
+#include "../libwx/wx_type.h"
 #include "ngbe_ethtool.h"
 
+static void ngbe_get_wol(struct net_device *netdev,
+			 struct ethtool_wolinfo *wol)
+{
+	struct wx *wx = netdev_priv(netdev);
+
+	if (!wx->wol_hw_supported)
+		return;
+	wol->supported = WAKE_MAGIC;
+	wol->wolopts = 0;
+	if (wx->wol & WX_PSR_WKUP_CTL_MAG)
+		wol->wolopts |= WAKE_MAGIC;
+}
+
+static int ngbe_set_wol(struct net_device *netdev,
+			struct ethtool_wolinfo *wol)
+{
+	struct wx *wx = netdev_priv(netdev);
+	struct pci_dev *pdev = wx->pdev;
+
+	if (!wx->wol_hw_supported)
+		return -EOPNOTSUPP;
+
+	wx->wol = 0;
+	if (wol->wolopts & WAKE_MAGIC)
+		wx->wol = WX_PSR_WKUP_CTL_MAG;
+	netdev->wol_enabled = !!(wx->wol);
+	wr32(wx, WX_PSR_WKUP_CTL, wx->wol);
+	device_set_wakeup_enable(&pdev->dev, netdev->wol_enabled);
+
+	return 0;
+}
+
 static const struct ethtool_ops ngbe_ethtool_ops = {
 	.get_drvinfo		= wx_get_drvinfo,
 	.get_link		= ethtool_op_get_link,
 	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
 	.nway_reset		= phy_ethtool_nway_reset,
+	.get_wol		= ngbe_get_wol,
+	.set_wol		= ngbe_set_wol,
 };
 
 void ngbe_set_ethtool_ops(struct net_device *netdev)

drivers/net/ethernet/wangxun/ngbe/ngbe_main.c

@@ -62,7 +62,7 @@ static void ngbe_init_type_code(struct wx *wx)
 		       em_mac_type_rgmii :
 		       em_mac_type_mdi;
 
-	wx->wol_enabled = (wol_mask == NGBE_WOL_SUP) ? 1 : 0;
+	wx->wol_hw_supported = (wol_mask == NGBE_WOL_SUP) ? 1 : 0;
 	wx->ncsi_enabled = (ncsi_mask == NGBE_NCSI_MASK ||
 			   type_mask == NGBE_SUBID_OCP_CARD) ? 1 : 0;
 
@@ -440,14 +440,26 @@ static void ngbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
 {
 	struct wx *wx = pci_get_drvdata(pdev);
 	struct net_device *netdev;
+	u32 wufc = wx->wol;
 
 	netdev = wx->netdev;
+	rtnl_lock();
 	netif_device_detach(netdev);
 
-	rtnl_lock();
 	if (netif_running(netdev))
-		ngbe_down(wx);
+		ngbe_close(netdev);
+	wx_clear_interrupt_scheme(wx);
 	rtnl_unlock();
+
+	if (wufc) {
+		wx_set_rx_mode(netdev);
+		wx_configure_rx(wx);
+		wr32(wx, NGBE_PSR_WKUP_CTL, wufc);
+	} else {
+		wr32(wx, NGBE_PSR_WKUP_CTL, 0);
+	}
+	pci_wake_from_d3(pdev, !!wufc);
+	*enable_wake = !!wufc;
 	wx_control_hw(wx, false);
 
 	pci_disable_device(pdev);
@@ -621,12 +633,11 @@ static int ngbe_probe(struct pci_dev *pdev,
 	}
 
 	wx->wol = 0;
-	if (wx->wol_enabled)
+	if (wx->wol_hw_supported)
 		wx->wol = NGBE_PSR_WKUP_CTL_MAG;
 
-	wx->wol_enabled = !!(wx->wol);
+	netdev->wol_enabled = !!(wx->wol);
 	wr32(wx, NGBE_PSR_WKUP_CTL, wx->wol);
-
 	device_set_wakeup_enable(&pdev->dev, wx->wol);
 
 	/* Save off EEPROM version number and Option Rom version which
@@ -712,11 +723,52 @@ static void ngbe_remove(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
+static int ngbe_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	bool wake;
+
+	ngbe_dev_shutdown(pdev, &wake);
+	device_set_wakeup_enable(&pdev->dev, wake);
+
+	return 0;
+}
+
+static int ngbe_resume(struct pci_dev *pdev)
+{
+	struct net_device *netdev;
+	struct wx *wx;
+	u32 err;
+
+	wx = pci_get_drvdata(pdev);
+	netdev = wx->netdev;
+
+	err = pci_enable_device_mem(pdev);
+	if (err) {
+		wx_err(wx, "Cannot enable PCI device from suspend\n");
+		return err;
+	}
+	pci_set_master(pdev);
+	device_wakeup_disable(&pdev->dev);
+
+	ngbe_reset_hw(wx);
+	rtnl_lock();
+	err = wx_init_interrupt_scheme(wx);
+	if (!err && netif_running(netdev))
+		err = ngbe_open(netdev);
+	if (!err)
+		netif_device_attach(netdev);
+	rtnl_unlock();
+
+	return 0;
+}
+
 static struct pci_driver ngbe_driver = {
 	.name     = ngbe_driver_name,
 	.id_table = ngbe_pci_tbl,
 	.probe    = ngbe_probe,
 	.remove   = ngbe_remove,
+	.suspend  = ngbe_suspend,
+	.resume   = ngbe_resume,
 	.shutdown = ngbe_shutdown,
 };
 

drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c

@@ -236,6 +236,7 @@ static void ngbe_phy_fixup(struct wx *wx)
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
 	phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
 
+	phydev->mac_managed_pm = true;
 	if (wx->mac_type != em_mac_type_mdi)
 		return;
 	/* disable EEE, internal phy does not support eee */