[PATCH] e1000: Fix SoL/IDER link and loopback

Fix so that if a SoL/IDER session is active, do not allow operations which require a PHY reset and instead log a message.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

drivers/net/e1000/e1000_ethtool.c

@@ -183,7 +183,15 @@ e1000_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	struct e1000_hw *hw = &adapter->hw;
 
-	if(ecmd->autoneg == AUTONEG_ENABLE) {
+	/* When SoL/IDER sessions are active, autoneg/speed/duplex
+	 * cannot be changed */
+	if (e1000_check_phy_reset_block(hw)) {
+		DPRINTK(DRV, ERR, "Cannot change link characteristics "
+		        "when SoL/IDER is active.\n");
+		return -EINVAL;
+	}
+
+	if (ecmd->autoneg == AUTONEG_ENABLE) {
 		hw->autoneg = 1;
 		if(hw->media_type == e1000_media_type_fiber)
 			hw->autoneg_advertised = ADVERTISED_1000baseT_Full |
@@ -562,29 +570,10 @@ e1000_get_drvinfo(struct net_device *netdev,
                        struct ethtool_drvinfo *drvinfo)
 {
 	struct e1000_adapter *adapter = netdev_priv(netdev);
-	char firmware_version[32];
-	uint16_t eeprom_data;
 
 	strncpy(drvinfo->driver,  e1000_driver_name, 32);
 	strncpy(drvinfo->version, e1000_driver_version, 32);
-	
-	/* EEPROM image version # is reported as firware version # for
-	 * 8257{1|2|3} controllers */
-	e1000_read_eeprom(&adapter->hw, 5, 1, &eeprom_data);
-	switch (adapter->hw.mac_type) {
-	case e1000_82571:
-	case e1000_82572:
-	case e1000_82573:
-		sprintf(firmware_version, "%d.%d-%d", 
-			(eeprom_data & 0xF000) >> 12,
-			(eeprom_data & 0x0FF0) >> 4,
-			eeprom_data & 0x000F);
-		break;
-	default:
-		sprintf(firmware_version, "n/a");
-	}
-
-	strncpy(drvinfo->fw_version, firmware_version, 32);
+	strncpy(drvinfo->fw_version, "N/A", 32);
 	strncpy(drvinfo->bus_info, pci_name(adapter->pdev), 32);
 	drvinfo->n_stats = E1000_STATS_LEN;
 	drvinfo->testinfo_len = E1000_TEST_LEN;
@@ -990,10 +979,8 @@ e1000_free_desc_rings(struct e1000_adapter *adapter)
 
 	kfree(txdr->buffer_info);
 	txdr->buffer_info = NULL;
-
 	kfree(rxdr->buffer_info);
 	rxdr->buffer_info = NULL;
-
 	return;
 }
 
@@ -1328,32 +1315,21 @@ static int
 e1000_setup_loopback_test(struct e1000_adapter *adapter)
 {
 	uint32_t rctl;
-	struct e1000_hw *hw = &adapter->hw;
 
-	if (hw->media_type == e1000_media_type_fiber ||
-	   hw->media_type == e1000_media_type_internal_serdes) {
-		switch (hw->mac_type) {
-		case e1000_82545:
-		case e1000_82546:
-		case e1000_82545_rev_3:
-		case e1000_82546_rev_3:
+	if(adapter->hw.media_type == e1000_media_type_fiber ||
+	   adapter->hw.media_type == e1000_media_type_internal_serdes) {
+		if(adapter->hw.mac_type == e1000_82545 ||
+		   adapter->hw.mac_type == e1000_82546 ||
+		   adapter->hw.mac_type == e1000_82545_rev_3 ||
+		   adapter->hw.mac_type == e1000_82546_rev_3)
 			return e1000_set_phy_loopback(adapter);
-			break;
-		case e1000_82571:
-		case e1000_82572:
-#define E1000_SERDES_LB_ON 0x410
-			e1000_set_phy_loopback(adapter);
-			E1000_WRITE_REG(hw, SCTL, E1000_SERDES_LB_ON);
-			msec_delay(10);
-			return 0;
-			break;
-		default:
-			rctl = E1000_READ_REG(hw, RCTL);
+		else {
+			rctl = E1000_READ_REG(&adapter->hw, RCTL);
 			rctl |= E1000_RCTL_LBM_TCVR;
-			E1000_WRITE_REG(hw, RCTL, rctl);
+			E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
 			return 0;
 		}
-	} else if (hw->media_type == e1000_media_type_copper)
+	} else if(adapter->hw.media_type == e1000_media_type_copper)
 		return e1000_set_phy_loopback(adapter);
 
 	return 7;
@@ -1364,36 +1340,25 @@ e1000_loopback_cleanup(struct e1000_adapter *adapter)
 {
 	uint32_t rctl;
 	uint16_t phy_reg;
-	struct e1000_hw *hw = &adapter->hw;
 
 	rctl = E1000_READ_REG(&adapter->hw, RCTL);
 	rctl &= ~(E1000_RCTL_LBM_TCVR | E1000_RCTL_LBM_MAC);
 	E1000_WRITE_REG(&adapter->hw, RCTL, rctl);
 
-	switch (hw->mac_type) {
-	case e1000_82571:
-	case e1000_82572:
-		if (hw->media_type == e1000_media_type_fiber ||
-		   hw->media_type == e1000_media_type_internal_serdes){
-#define E1000_SERDES_LB_OFF 0x400
-			E1000_WRITE_REG(hw, SCTL, E1000_SERDES_LB_OFF);
-			msec_delay(10);
-			break;
-		}
-		/* fall thru for Cu adapters */
-	case e1000_82545:
-	case e1000_82546:
-	case e1000_82545_rev_3:
-	case e1000_82546_rev_3:
-	default:
-		hw->autoneg = TRUE;
-		e1000_read_phy_reg(hw, PHY_CTRL, &phy_reg);
-		if (phy_reg & MII_CR_LOOPBACK) {
+	if(adapter->hw.media_type == e1000_media_type_copper ||
+	   ((adapter->hw.media_type == e1000_media_type_fiber ||
+	     adapter->hw.media_type == e1000_media_type_internal_serdes) &&
+	    (adapter->hw.mac_type == e1000_82545 ||
+	     adapter->hw.mac_type == e1000_82546 ||
+	     adapter->hw.mac_type == e1000_82545_rev_3 ||
+	     adapter->hw.mac_type == e1000_82546_rev_3))) {
+		adapter->hw.autoneg = TRUE;
+		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &phy_reg);
+		if(phy_reg & MII_CR_LOOPBACK) {
 			phy_reg &= ~MII_CR_LOOPBACK;
-			e1000_write_phy_reg(hw, PHY_CTRL, phy_reg);
-			e1000_phy_reset(hw);
+			e1000_write_phy_reg(&adapter->hw, PHY_CTRL, phy_reg);
+			e1000_phy_reset(&adapter->hw);
 		}
-		break;
 	}
 }
 
@@ -1488,14 +1453,25 @@ e1000_run_loopback_test(struct e1000_adapter *adapter)
 static int
 e1000_loopback_test(struct e1000_adapter *adapter, uint64_t *data)
 {
-	if((*data = e1000_setup_desc_rings(adapter))) goto err_loopback;
-	if((*data = e1000_setup_loopback_test(adapter)))
-		goto err_loopback_setup;
+	/* PHY loopback cannot be performed if SoL/IDER
+	 * sessions are active */
+	if (e1000_check_phy_reset_block(&adapter->hw)) {
+		DPRINTK(DRV, ERR, "Cannot do PHY loopback test "
+		        "when SoL/IDER is active.\n");
+		*data = 0;
+		goto out;
+	}
+
+	if ((*data = e1000_setup_desc_rings(adapter)))
+		goto out;
+	if ((*data = e1000_setup_loopback_test(adapter)))
+		goto err_loopback;
 	*data = e1000_run_loopback_test(adapter);
 	e1000_loopback_cleanup(adapter);
-err_loopback_setup:
-	e1000_free_desc_rings(adapter);
+
 err_loopback:
+	e1000_free_desc_rings(adapter);
+out:
 	return *data;
 }
 
@@ -1722,14 +1698,6 @@ e1000_phys_id(struct net_device *netdev, uint32_t data)
 		msleep_interruptible(data * 1000);
 		del_timer_sync(&adapter->blink_timer);
 	}
-	else if(adapter->hw.mac_type < e1000_82573) {
-		E1000_WRITE_REG(&adapter->hw, LEDCTL, (E1000_LEDCTL_LED2_BLINK_RATE |
-			E1000_LEDCTL_LED0_BLINK | E1000_LEDCTL_LED2_BLINK |
-			(E1000_LEDCTL_MODE_LED_ON << E1000_LEDCTL_LED2_MODE_SHIFT) |
-			(E1000_LEDCTL_MODE_LINK_ACTIVITY << E1000_LEDCTL_LED0_MODE_SHIFT) |
-			(E1000_LEDCTL_MODE_LED_OFF << E1000_LEDCTL_LED1_MODE_SHIFT)));
-		msleep_interruptible(data * 1000);
-	}
 	else {
 		E1000_WRITE_REG(&adapter->hw, LEDCTL, (E1000_LEDCTL_LED2_BLINK_RATE |
 			E1000_LEDCTL_LED1_BLINK | E1000_LEDCTL_LED2_BLINK | 

drivers/net/e1000/e1000_main.c

@@ -378,6 +378,8 @@ void
 e1000_down(struct e1000_adapter *adapter)
 {
 	struct net_device *netdev = adapter->netdev;
+	boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
+				     e1000_check_mng_mode(&adapter->hw);
 
 	e1000_irq_disable(adapter);
 #ifdef CONFIG_E1000_MQ
@@ -405,12 +407,16 @@ e1000_down(struct e1000_adapter *adapter)
 	e1000_clean_all_tx_rings(adapter);
 	e1000_clean_all_rx_rings(adapter);
 
-	/* If WoL is not enabled and management mode is not IAMT
-	 * Power down the PHY so no link is implied when interface is down */
-	if(!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
+	/* Power down the PHY so no link is implied when interface is down *
+	 * The PHY cannot be powered down if any of the following is TRUE *
+	 * (a) WoL is enabled
+	 * (b) AMT is active
+	 * (c) SoL/IDER session is active */
+	if (!adapter->wol && adapter->hw.mac_type >= e1000_82540 &&
 	   adapter->hw.media_type == e1000_media_type_copper &&
-	   !e1000_check_mng_mode(&adapter->hw) &&
-	   !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN)) {
+	   !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
+	   !mng_mode_enabled &&
+	   !e1000_check_phy_reset_block(&adapter->hw)) {
 		uint16_t mii_reg;
 		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
 		mii_reg |= MII_CR_POWER_DOWN;

drivers/net/e1000/e1000_param.c

@@ -584,6 +584,12 @@ e1000_check_copper_options(struct e1000_adapter *adapter)
 					 .p = dplx_list }}
 		};
 
+		if (e1000_check_phy_reset_block(&adapter->hw)) {
+			DPRINTK(PROBE, INFO,
+				"Link active due to SoL/IDER Session. "
+			        "Speed/Duplex/AutoNeg parameter ignored.\n");
+			return;
+		}
 		if (num_Duplex > bd) {
 			dplx = Duplex[bd];
 			e1000_validate_option(&dplx, &opt, adapter);