e1000: Fixed the following issues with ESB2 (requires ESB2 support):

- Add restriction for ESB2 to MTU size <=9216
- Removed FIFO errors which were not being used
- Fixed issues with loopback
- Power management change for saving state and config space
- WA to disable recieves and reset device on link loss.  Reset needed to be done outside the interrupt context - modified existing tx_timeout_task

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>

3 files changed, 65 insertions, 14 deletions

diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 3319c19cbee..d4266f18bbd 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -252,8 +252,8 @@ struct e1000_adapter {
 	spinlock_t tx_queue_lock;
 #endif
 	atomic_t irq_sem;
-	struct work_struct tx_timeout_task;
 	struct work_struct watchdog_task;
+	struct work_struct reset_task;
 	uint8_t fc_autoneg;
 
 	struct timer_list blink_timer;
@@ -328,7 +328,7 @@ struct e1000_adapter {
 	struct e1000_rx_ring test_rx_ring;
 
 
-	u32 *config_space;
+	uint32_t *config_space;
 	int msg_enable;
 #ifdef CONFIG_PCI_MSI
 	boolean_t have_msi;
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 0d6a16c5f8c..44d39f1d829 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -67,7 +67,6 @@ static const struct e1000_stats e1000_gstrings_stats[] = {
 	{ "rx_over_errors", E1000_STAT(net_stats.rx_over_errors) },
 	{ "rx_crc_errors", E1000_STAT(net_stats.rx_crc_errors) },
 	{ "rx_frame_errors", E1000_STAT(net_stats.rx_frame_errors) },
-	{ "rx_fifo_errors", E1000_STAT(net_stats.rx_fifo_errors) },
 	{ "rx_no_buffer_count", E1000_STAT(stats.rnbc) },
 	{ "rx_missed_errors", E1000_STAT(net_stats.rx_missed_errors) },
 	{ "tx_aborted_errors", E1000_STAT(net_stats.tx_aborted_errors) },
@@ -1253,6 +1252,10 @@ e1000_integrated_phy_loopback(struct e1000_adapter *adapter)
 		e1000_write_phy_reg(&adapter->hw, PHY_CTRL, 0x9140);
 		/* autoneg off */
 		e1000_write_phy_reg(&adapter->hw, PHY_CTRL, 0x8140);
+	} else if (adapter->hw.phy_type == e1000_phy_gg82563) {
+		e1000_write_phy_reg(&adapter->hw,
+		                    GG82563_PHY_KMRN_MODE_CTRL,
+		                    0x1CE);
 	}
 	/* force 1000, set loopback */
 	e1000_write_phy_reg(&adapter->hw, PHY_CTRL, 0x4140);
@@ -1403,6 +1406,11 @@ e1000_loopback_cleanup(struct e1000_adapter *adapter)
 	case e1000_82546_rev_3:
 	default:
 		hw->autoneg = TRUE;
+		if (hw->phy_type == e1000_phy_gg82563) {
+			e1000_write_phy_reg(hw,
+					    GG82563_PHY_KMRN_MODE_CTRL,
+					    0x180);
+		}
 		e1000_read_phy_reg(hw, PHY_CTRL, &phy_reg);
 		if (phy_reg & MII_CR_LOOPBACK) {
 			phy_reg &= ~MII_CR_LOOPBACK;
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 3acbffd5bde..431b03ee077 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -245,7 +245,7 @@ void e1000_set_ethtool_ops(struct net_device *netdev);
 static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
 static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
 static void e1000_tx_timeout(struct net_device *dev);
-static void e1000_tx_timeout_task(struct net_device *dev);
+static void e1000_reset_task(struct net_device *dev);
 static void e1000_smartspeed(struct e1000_adapter *adapter);
 static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
 					      struct sk_buff *skb);
@@ -611,7 +611,10 @@ e1000_reset(struct e1000_adapter *adapter)
 
 	adapter->hw.fc_high_water = fc_high_water_mark;
 	adapter->hw.fc_low_water = fc_high_water_mark - 8;
-	adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
+	if (adapter->hw.mac_type == e1000_80003es2lan)
+		adapter->hw.fc_pause_time = 0xFFFF;
+	else
+		adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
 	adapter->hw.fc_send_xon = 1;
 	adapter->hw.fc = adapter->hw.original_fc;
 
@@ -828,8 +831,8 @@ e1000_probe(struct pci_dev *pdev,
 	adapter->phy_info_timer.function = &e1000_update_phy_info;
 	adapter->phy_info_timer.data = (unsigned long) adapter;
 
-	INIT_WORK(&adapter->tx_timeout_task,
-		(void (*)(void *))e1000_tx_timeout_task, netdev);
+	INIT_WORK(&adapter->reset_task,
+		(void (*)(void *))e1000_reset_task, netdev);
 
 	/* we're going to reset, so assume we have no link for now */
 
@@ -1390,6 +1393,10 @@ e1000_configure_tx(struct e1000_adapter *adapter)
 		ipgr1 = DEFAULT_82542_TIPG_IPGR1;
 		ipgr2 = DEFAULT_82542_TIPG_IPGR2;
 		break;
+	case e1000_80003es2lan:
+		ipgr1 = DEFAULT_82543_TIPG_IPGR1;
+		ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2;
+		break;
 	default:
 		ipgr1 = DEFAULT_82543_TIPG_IPGR1;
 		ipgr2 = DEFAULT_82543_TIPG_IPGR2;
@@ -1429,6 +1436,15 @@ e1000_configure_tx(struct e1000_adapter *adapter)
 		else
 			tarc |= (1 << 28);
 		E1000_WRITE_REG(hw, TARC1, tarc);
+	} else if (hw->mac_type == e1000_80003es2lan) {
+		tarc = E1000_READ_REG(hw, TARC0);
+		tarc |= 1;
+		if (hw->media_type == e1000_media_type_internal_serdes)
+			tarc |= (1 << 20);
+		E1000_WRITE_REG(hw, TARC0, tarc);
+		tarc = E1000_READ_REG(hw, TARC1);
+		tarc |= 1;
+		E1000_WRITE_REG(hw, TARC1, tarc);
 	}
 
 	e1000_config_collision_dist(hw);
@@ -2349,6 +2365,16 @@ e1000_watchdog_task(struct e1000_adapter *adapter)
 			netif_carrier_off(netdev);
 			netif_stop_queue(netdev);
 			mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ);
+
+			/* 80003ES2LAN workaround--
+			 * For packet buffer work-around on link down event;
+			 * disable receives in the ISR and
+			 * reset device here in the watchdog
+			 */
+			if (adapter->hw.mac_type == e1000_80003es2lan) {
+				/* reset device */
+				schedule_work(&adapter->reset_task);
+			}
 		}
 
 		e1000_smartspeed(adapter);
@@ -2374,7 +2400,8 @@ e1000_watchdog_task(struct e1000_adapter *adapter)
 			 * but we've got queued Tx work that's never going
 			 * to get done, so reset controller to flush Tx.
 			 * (Do the reset outside of interrupt context). */
-			schedule_work(&adapter->tx_timeout_task);
+			adapter->tx_timeout_count++;
+			schedule_work(&adapter->reset_task);
 		}
 	}
 
@@ -2940,15 +2967,15 @@ e1000_tx_timeout(struct net_device *netdev)
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 
 	/* Do the reset outside of interrupt context */
-	schedule_work(&adapter->tx_timeout_task);
+	adapter->tx_timeout_count++;
+	schedule_work(&adapter->reset_task);
 }
 
 static void
-e1000_tx_timeout_task(struct net_device *netdev)
+e1000_reset_task(struct net_device *netdev)
 {
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 
-	adapter->tx_timeout_count++;
 	e1000_down(adapter);
 	e1000_up(adapter);
 }
@@ -3016,6 +3043,7 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
 		/* fall through to get support */
 	case e1000_82571:
 	case e1000_82572:
+	case e1000_80003es2lan:
 #define MAX_STD_JUMBO_FRAME_SIZE 9234
 		if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
 			DPRINTK(PROBE, ERR, "MTU > 9216 not supported.\n");
@@ -3169,11 +3197,15 @@ e1000_update_stats(struct e1000_adapter *adapter)
 
 	/* Rx Errors */
 
+	/* RLEC on some newer hardware can be incorrect so build
+	* our own version based on RUC and ROC */
 	adapter->net_stats.rx_errors = adapter->stats.rxerrc +
 		adapter->stats.crcerrs + adapter->stats.algnerrc +
-		adapter->stats.rlec + adapter->stats.cexterr;
+		adapter->stats.ruc + adapter->stats.roc +
+		adapter->stats.cexterr;
 	adapter->net_stats.rx_dropped = 0;
-	adapter->net_stats.rx_length_errors = adapter->stats.rlec;
+	adapter->net_stats.rx_length_errors = adapter->stats.ruc +
+	                                      adapter->stats.roc;
 	adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
 	adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
 	adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
@@ -3219,7 +3251,7 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
 	struct net_device *netdev = data;
 	struct e1000_adapter *adapter = netdev_priv(netdev);
 	struct e1000_hw *hw = &adapter->hw;
-	uint32_t icr = E1000_READ_REG(hw, ICR);
+	uint32_t rctl, icr = E1000_READ_REG(hw, ICR);
 #ifndef CONFIG_E1000_NAPI
 	int i;
 #else
@@ -3241,6 +3273,17 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
 
 	if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
 		hw->get_link_status = 1;
+		/* 80003ES2LAN workaround--
+		 * For packet buffer work-around on link down event;
+		 * disable receives here in the ISR and
+		 * reset adapter in watchdog
+		 */
+		if (netif_carrier_ok(netdev) &&
+		    (adapter->hw.mac_type == e1000_80003es2lan)) {
+			/* disable receives */
+			rctl = E1000_READ_REG(hw, RCTL);
+			E1000_WRITE_REG(hw, RCTL, rctl & ~E1000_RCTL_EN);
+		}
 		mod_timer(&adapter->watchdog_timer, jiffies);
 	}