1 files changed, 109 insertions, 36 deletions

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index e561d15c3eb1..992b622fe205 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -475,7 +475,8 @@ static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 {
 	u16 status = (u16)status_err;
 	u8 errors = (u8)(status_err >> 24);
-	skb->ip_summed = CHECKSUM_NONE;
+
+	skb_checksum_none_assert(skb);
 
 	/* Ignore Checksum bit is set */
 	if (status & E1000_RXD_STAT_IXSM)
@@ -1052,7 +1053,7 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 	adapter->total_tx_packets += total_tx_packets;
 	netdev->stats.tx_bytes += total_tx_bytes;
 	netdev->stats.tx_packets += total_tx_packets;
-	return (count < tx_ring->count);
+	return count < tx_ring->count;
 }
 
 /**
@@ -2289,6 +2290,11 @@ static void e1000_set_itr(struct e1000_adapter *adapter)
 		goto set_itr_now;
 	}
 
+	if (adapter->flags2 & FLAG2_DISABLE_AIM) {
+		new_itr = 0;
+		goto set_itr_now;
+	}
+
 	adapter->tx_itr = e1000_update_itr(adapter,
 				    adapter->tx_itr,
 				    adapter->total_tx_packets,
@@ -2337,7 +2343,10 @@ set_itr_now:
 		if (adapter->msix_entries)
 			adapter->rx_ring->set_itr = 1;
 		else
-			ew32(ITR, 1000000000 / (new_itr * 256));
+			if (new_itr)
+				ew32(ITR, 1000000000 / (new_itr * 256));
+			else
+				ew32(ITR, 0);
 	}
 }
 
@@ -2649,6 +2658,26 @@ static void e1000_configure_tx(struct e1000_adapter *adapter)
 	/* Tx irq moderation */
 	ew32(TADV, adapter->tx_abs_int_delay);
 
+	if (adapter->flags2 & FLAG2_DMA_BURST) {
+		u32 txdctl = er32(TXDCTL(0));
+		txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
+			    E1000_TXDCTL_WTHRESH);
+		/*
+		 * set up some performance related parameters to encourage the
+		 * hardware to use the bus more efficiently in bursts, depends
+		 * on the tx_int_delay to be enabled,
+		 * wthresh = 5 ==> burst write a cacheline (64 bytes) at a time
+		 * hthresh = 1 ==> prefetch when one or more available
+		 * pthresh = 0x1f ==> prefetch if internal cache 31 or less
+		 * BEWARE: this seems to work but should be considered first if
+		 * there are tx hangs or other tx related bugs
+		 */
+		txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
+		ew32(TXDCTL(0), txdctl);
+		/* erratum work around: set txdctl the same for both queues */
+		ew32(TXDCTL(1), txdctl);
+	}
+
 	/* Program the Transmit Control Register */
 	tctl = er32(TCTL);
 	tctl &= ~E1000_TCTL_CT;
@@ -2871,12 +2900,35 @@ static void e1000_configure_rx(struct e1000_adapter *adapter)
 	e1e_flush();
 	msleep(10);
 
+	if (adapter->flags2 & FLAG2_DMA_BURST) {
+		/*
+		 * set the writeback threshold (only takes effect if the RDTR
+		 * is set). set GRAN=1 and write back up to 0x4 worth, and
+		 * enable prefetching of 0x20 rx descriptors
+		 * granularity = 01
+		 * wthresh = 04,
+		 * hthresh = 04,
+		 * pthresh = 0x20
+		 */
+		ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
+		ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
+
+		/*
+		 * override the delay timers for enabling bursting, only if
+		 * the value was not set by the user via module options
+		 */
+		if (adapter->rx_int_delay == DEFAULT_RDTR)
+			adapter->rx_int_delay = BURST_RDTR;
+		if (adapter->rx_abs_int_delay == DEFAULT_RADV)
+			adapter->rx_abs_int_delay = BURST_RADV;
+	}
+
 	/* set the Receive Delay Timer Register */
 	ew32(RDTR, adapter->rx_int_delay);
 
 	/* irq moderation */
 	ew32(RADV, adapter->rx_abs_int_delay);
-	if (adapter->itr_setting != 0)
+	if ((adapter->itr_setting != 0) && (adapter->itr != 0))
 		ew32(ITR, 1000000000 / (adapter->itr * 256));
 
 	ctrl_ext = er32(CTRL_EXT);
@@ -2921,11 +2973,13 @@ static void e1000_configure_rx(struct e1000_adapter *adapter)
 	 * packet size is equal or larger than the specified value (in 8 byte
 	 * units), e.g. using jumbo frames when setting to E1000_ERT_2048
 	 */
-	if (adapter->flags & FLAG_HAS_ERT) {
+	if ((adapter->flags & FLAG_HAS_ERT) ||
+	    (adapter->hw.mac.type == e1000_pch2lan)) {
 		if (adapter->netdev->mtu > ETH_DATA_LEN) {
 			u32 rxdctl = er32(RXDCTL(0));
 			ew32(RXDCTL(0), rxdctl | 0x3);
-			ew32(ERT, E1000_ERT_2048 | (1 << 13));
+			if (adapter->flags & FLAG_HAS_ERT)
+				ew32(ERT, E1000_ERT_2048 | (1 << 13));
 			/*
 			 * With jumbo frames and early-receive enabled,
 			 * excessive C-state transition latencies result in
@@ -3188,9 +3242,35 @@ void e1000e_reset(struct e1000_adapter *adapter)
 		fc->low_water = 0x05048;
 		fc->pause_time = 0x0650;
 		fc->refresh_time = 0x0400;
+		if (adapter->netdev->mtu > ETH_DATA_LEN) {
+			pba = 14;
+			ew32(PBA, pba);
+		}
 		break;
 	}
 
+	/*
+	 * Disable Adaptive Interrupt Moderation if 2 full packets cannot
+	 * fit in receive buffer and early-receive not supported.
+	 */
+	if (adapter->itr_setting & 0x3) {
+		if (((adapter->max_frame_size * 2) > (pba << 10)) &&
+		    !(adapter->flags & FLAG_HAS_ERT)) {
+			if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
+				dev_info(&adapter->pdev->dev,
+					"Interrupt Throttle Rate turned off\n");
+				adapter->flags2 |= FLAG2_DISABLE_AIM;
+				ew32(ITR, 0);
+			}
+		} else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
+			dev_info(&adapter->pdev->dev,
+				 "Interrupt Throttle Rate turned on\n");
+			adapter->flags2 &= ~FLAG2_DISABLE_AIM;
+			adapter->itr = 20000;
+			ew32(ITR, 1000000000 / (adapter->itr * 256));
+		}
+	}
+
 	/* Allow time for pending master requests to run */
 	mac->ops.reset_hw(hw);
 
@@ -3411,22 +3491,16 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
 
 	if (adapter->flags & FLAG_MSI_TEST_FAILED) {
 		adapter->int_mode = E1000E_INT_MODE_LEGACY;
-		err = -EIO;
-		e_info("MSI interrupt test failed!\n");
-	}
+		e_info("MSI interrupt test failed, using legacy interrupt.\n");
+	} else
+		e_dbg("MSI interrupt test succeeded!\n");
 
 	free_irq(adapter->pdev->irq, netdev);
 	pci_disable_msi(adapter->pdev);
 
-	if (err == -EIO)
-		goto msi_test_failed;
-
-	/* okay so the test worked, restore settings */
-	e_dbg("MSI interrupt test succeeded!\n");
 msi_test_failed:
 	e1000e_set_interrupt_capability(adapter);
-	e1000_request_irq(adapter);
-	return err;
+	return e1000_request_irq(adapter);
 }
 
 /**
@@ -3458,21 +3532,6 @@ static int e1000_test_msi(struct e1000_adapter *adapter)
 		pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
 	}
 
-	/* success ! */
-	if (!err)
-		return 0;
-
-	/* EIO means MSI test failed */
-	if (err != -EIO)
-		return err;
-
-	/* back to INTx mode */
-	e_warn("MSI interrupt test failed, using legacy interrupt.\n");
-
-	e1000_free_irq(adapter);
-
-	err = e1000_request_irq(adapter);
-
 	return err;
 }
 
@@ -3530,7 +3589,8 @@ static int e1000_open(struct net_device *netdev)
 		e1000_update_mng_vlan(adapter);
 
 	/* DMA latency requirement to workaround early-receive/jumbo issue */
-	if (adapter->flags & FLAG_HAS_ERT)
+	if ((adapter->flags & FLAG_HAS_ERT) ||
+	    (adapter->hw.mac.type == e1000_pch2lan))
 		pm_qos_add_request(&adapter->netdev->pm_qos_req,
 				   PM_QOS_CPU_DMA_LATENCY,
 				   PM_QOS_DEFAULT_VALUE);
@@ -3639,7 +3699,8 @@ static int e1000_close(struct net_device *netdev)
 	if (adapter->flags & FLAG_HAS_AMT)
 		e1000_release_hw_control(adapter);
 
-	if (adapter->flags & FLAG_HAS_ERT)
+	if ((adapter->flags & FLAG_HAS_ERT) ||
+	    (adapter->hw.mac.type == e1000_pch2lan))
 		pm_qos_remove_request(&adapter->netdev->pm_qos_req);
 
 	pm_runtime_put_sync(&pdev->dev);
@@ -4255,6 +4316,16 @@ link_up:
 	/* Force detection of hung controller every watchdog period */
 	adapter->detect_tx_hung = 1;
 
+	/* flush partial descriptors to memory before detecting tx hang */
+	if (adapter->flags2 & FLAG2_DMA_BURST) {
+		ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
+		ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
+		/*
+		 * no need to flush the writes because the timeout code does
+		 * an er32 first thing
+		 */
+	}
+
 	/*
 	 * With 82571 controllers, LAA may be overwritten due to controller
 	 * reset from the other port. Set the appropriate LAA in RAR[0]
@@ -5712,8 +5783,10 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 	netdev->vlan_features |= NETIF_F_HW_CSUM;
 	netdev->vlan_features |= NETIF_F_SG;
 
-	if (pci_using_dac)
+	if (pci_using_dac) {
 		netdev->features |= NETIF_F_HIGHDMA;
+		netdev->vlan_features |= NETIF_F_HIGHDMA;
+	}
 
 	if (e1000e_enable_mng_pass_thru(&adapter->hw))
 		adapter->flags |= FLAG_MNG_PT_ENABLED;
@@ -5754,11 +5827,11 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 	}
 
 	init_timer(&adapter->watchdog_timer);
-	adapter->watchdog_timer.function = &e1000_watchdog;
+	adapter->watchdog_timer.function = e1000_watchdog;
 	adapter->watchdog_timer.data = (unsigned long) adapter;
 
 	init_timer(&adapter->phy_info_timer);
-	adapter->phy_info_timer.function = &e1000_update_phy_info;
+	adapter->phy_info_timer.function = e1000_update_phy_info;
 	adapter->phy_info_timer.data = (unsigned long) adapter;
 
 	INIT_WORK(&adapter->reset_task, e1000_reset_task);