[net-next 0/6][pull request] Intel Wired LAN Driver Update

[net-next 0/6][pull request] Intel Wired LAN Driver Update

[Jeff Kirsher]

The following series contains updates to e1000e, ixgbe and ixgbevf.

The following are changes since commit 3cd0999d134235d64b175edd2eb1d46ebc97b377:
  Merge branch 'davem-next.mii' of git://git.kernel.org/pub/scm/linux/kernel/git/romieu/netdev-2.6
and are available in the git repository at:
  master.kernel.org:/pub/scm/linux/kernel/git/jkirsher/net-next master

Alexander Duyck (2):
  ixgbe: Simplify transmit cleanup path
  ixgbe: convert rings from q_vector bit indexed array to linked list

Bruce Allan (1):
  e1000e: convert to netdev features/hw_features API

Eric Dumazet (1):
  ixgbevf: provide 64 bit statistics

Greg Rose (1):
  ixgbevf: Check if EOP has changed before using it

Michał Mirosław (1):
  ixgbevf: convert to ndo_fix_features

 drivers/net/ethernet/intel/e1000e/80003es2lan.c   |    1 -
 drivers/net/ethernet/intel/e1000e/82571.c         |    5 -
 drivers/net/ethernet/intel/e1000e/e1000.h         |    3 +-
 drivers/net/ethernet/intel/e1000e/ethtool.c       |   88 ---------
 drivers/net/ethernet/intel/e1000e/ich8lan.c       |    5 -
 drivers/net/ethernet/intel/e1000e/netdev.c        |   49 ++++--
 drivers/net/ethernet/intel/ixgbe/ixgbe.h          |    7 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c     |  202 +++++++--------------
 drivers/net/ethernet/intel/ixgbevf/ethtool.c      |   46 -----
 drivers/net/ethernet/intel/ixgbevf/ixgbevf.h      |    8 +-
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |   81 +++++++--
 11 files changed, 175 insertions(+), 320 deletions(-)

-- 
1.7.6

[net-next 1/6] e1000e: convert to netdev features/hw_features API

[Jeff Kirsher]

From: Bruce Allan <bruce.w.allan@intel.com>

Private rx_csum flags are now duplicate of netdev->features &
NETIF_F_RXCSUM.  Remove those duplicates and use the net_device_ops
ndo_set_features.  This is based on the original patch submitted by
Michał Mirosław <mirq-linux@rere.qmqm.pl>

Cc: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/e1000e/80003es2lan.c |    1 -
 drivers/net/ethernet/intel/e1000e/82571.c       |    5 --
 drivers/net/ethernet/intel/e1000e/e1000.h       |    3 +-
 drivers/net/ethernet/intel/e1000e/ethtool.c     |   88 -----------------------
 drivers/net/ethernet/intel/e1000e/ich8lan.c     |    5 --
 drivers/net/ethernet/intel/e1000e/netdev.c      |   49 ++++++++++---
 6 files changed, 38 insertions(+), 113 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/80003es2lan.c b/drivers/net/ethernet/intel/e1000e/80003es2lan.c
index e4f4225..b754433 100644
--- a/drivers/net/ethernet/intel/e1000e/80003es2lan.c
+++ b/drivers/net/ethernet/intel/e1000e/80003es2lan.c
@@ -1498,7 +1498,6 @@ struct e1000_info e1000_es2_info = {
 				  | FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_RX_NEEDS_RESTART /* errata */
 				  | FLAG_TARC_SET_BIT_ZERO /* errata */
diff --git a/drivers/net/ethernet/intel/e1000e/82571.c b/drivers/net/ethernet/intel/e1000e/82571.c
index 536b3a5..2d4dc53 100644
--- a/drivers/net/ethernet/intel/e1000e/82571.c
+++ b/drivers/net/ethernet/intel/e1000e/82571.c
@@ -2019,7 +2019,6 @@ struct e1000_info e1000_82571_info = {
 				  | FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_SMART_POWER_DOWN
 				  | FLAG_RESET_OVERWRITES_LAA /* errata */
@@ -2041,7 +2040,6 @@ struct e1000_info e1000_82572_info = {
 				  | FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_TARC_SPEED_MODE_BIT, /* errata */
 	.flags2			= FLAG2_DISABLE_ASPM_L1 /* errata 13 */
@@ -2059,7 +2057,6 @@ struct e1000_info e1000_82573_info = {
 	.flags			= FLAG_HAS_HW_VLAN_FILTER
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_SMART_POWER_DOWN
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_SWSM_ON_LOAD,
@@ -2080,7 +2077,6 @@ struct e1000_info e1000_82574_info = {
 				  | FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_SMART_POWER_DOWN
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_CTRLEXT_ON_LOAD,
@@ -2100,7 +2096,6 @@ struct e1000_info e1000_82583_info = {
 	.flags			= FLAG_HAS_HW_VLAN_FILTER
 				  | FLAG_HAS_WOL
 				  | FLAG_APME_IN_CTRL3
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_SMART_POWER_DOWN
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_JUMBO_FRAMES
diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index fa72052..1b15d1f 100644
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -440,12 +440,11 @@ struct e1000_info {
 #define FLAG_LSC_GIG_SPEED_DROP           (1 << 25)
 #define FLAG_SMART_POWER_DOWN             (1 << 26)
 #define FLAG_MSI_ENABLED                  (1 << 27)
-#define FLAG_RX_CSUM_ENABLED              (1 << 28)
+/* reserved (1 << 28) */
 #define FLAG_TSO_FORCE                    (1 << 29)
 #define FLAG_RX_RESTART_NOW               (1 << 30)
 #define FLAG_MSI_TEST_FAILED              (1 << 31)
 
-/* CRC Stripping defines */
 #define FLAG2_CRC_STRIPPING               (1 << 0)
 #define FLAG2_HAS_PHY_WAKEUP              (1 << 1)
 #define FLAG2_IS_DISCARDING               (1 << 2)
diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index e0cbd6a..d96d0b0 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -367,59 +367,6 @@ out:
 	return retval;
 }
 
-static u32 e1000_get_rx_csum(struct net_device *netdev)
-{
-	struct e1000_adapter *adapter = netdev_priv(netdev);
-	return adapter->flags & FLAG_RX_CSUM_ENABLED;
-}
-
-static int e1000_set_rx_csum(struct net_device *netdev, u32 data)
-{
-	struct e1000_adapter *adapter = netdev_priv(netdev);
-
-	if (data)
-		adapter->flags |= FLAG_RX_CSUM_ENABLED;
-	else
-		adapter->flags &= ~FLAG_RX_CSUM_ENABLED;
-
-	if (netif_running(netdev))
-		e1000e_reinit_locked(adapter);
-	else
-		e1000e_reset(adapter);
-	return 0;
-}
-
-static u32 e1000_get_tx_csum(struct net_device *netdev)
-{
-	return (netdev->features & NETIF_F_HW_CSUM) != 0;
-}
-
-static int e1000_set_tx_csum(struct net_device *netdev, u32 data)
-{
-	if (data)
-		netdev->features |= NETIF_F_HW_CSUM;
-	else
-		netdev->features &= ~NETIF_F_HW_CSUM;
-
-	return 0;
-}
-
-static int e1000_set_tso(struct net_device *netdev, u32 data)
-{
-	struct e1000_adapter *adapter = netdev_priv(netdev);
-
-	if (data) {
-		netdev->features |= NETIF_F_TSO;
-		netdev->features |= NETIF_F_TSO6;
-	} else {
-		netdev->features &= ~NETIF_F_TSO;
-		netdev->features &= ~NETIF_F_TSO6;
-	}
-
-	adapter->flags |= FLAG_TSO_FORCE;
-	return 0;
-}
-
 static u32 e1000_get_msglevel(struct net_device *netdev)
 {
 	struct e1000_adapter *adapter = netdev_priv(netdev);
@@ -2014,31 +1961,6 @@ static void e1000_get_strings(struct net_device *netdev, u32 stringset,
 	}
 }
 
-static int e1000e_set_flags(struct net_device *netdev, u32 data)
-{
-	struct e1000_adapter *adapter = netdev_priv(netdev);
-	bool need_reset = false;
-	int rc;
-
-	need_reset = (data & ETH_FLAG_RXVLAN) !=
-		     (netdev->features & NETIF_F_HW_VLAN_RX);
-
-	rc = ethtool_op_set_flags(netdev, data, ETH_FLAG_RXVLAN |
-				  ETH_FLAG_TXVLAN);
-
-	if (rc)
-		return rc;
-
-	if (need_reset) {
-		if (netif_running(netdev))
-			e1000e_reinit_locked(adapter);
-		else
-			e1000e_reset(adapter);
-	}
-
-	return 0;
-}
-
 static const struct ethtool_ops e1000_ethtool_ops = {
 	.get_settings		= e1000_get_settings,
 	.set_settings		= e1000_set_settings,
@@ -2058,14 +1980,6 @@ static const struct ethtool_ops e1000_ethtool_ops = {
 	.set_ringparam		= e1000_set_ringparam,
 	.get_pauseparam		= e1000_get_pauseparam,
 	.set_pauseparam		= e1000_set_pauseparam,
-	.get_rx_csum		= e1000_get_rx_csum,
-	.set_rx_csum		= e1000_set_rx_csum,
-	.get_tx_csum		= e1000_get_tx_csum,
-	.set_tx_csum		= e1000_set_tx_csum,
-	.get_sg			= ethtool_op_get_sg,
-	.set_sg			= ethtool_op_set_sg,
-	.get_tso		= ethtool_op_get_tso,
-	.set_tso		= e1000_set_tso,
 	.self_test		= e1000_diag_test,
 	.get_strings		= e1000_get_strings,
 	.set_phys_id		= e1000_set_phys_id,
@@ -2073,8 +1987,6 @@ static const struct ethtool_ops e1000_ethtool_ops = {
 	.get_sset_count		= e1000e_get_sset_count,
 	.get_coalesce		= e1000_get_coalesce,
 	.set_coalesce		= e1000_set_coalesce,
-	.get_flags		= ethtool_op_get_flags,
-	.set_flags		= e1000e_set_flags,
 };
 
 void e1000e_set_ethtool_ops(struct net_device *netdev)
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.c b/drivers/net/ethernet/intel/e1000e/ich8lan.c
index 54add27..3fc3acc 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.c
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.c
@@ -4058,7 +4058,6 @@ struct e1000_info e1000_ich8_info = {
 	.mac			= e1000_ich8lan,
 	.flags			= FLAG_HAS_WOL
 				  | FLAG_IS_ICH
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_FLASH
@@ -4076,7 +4075,6 @@ struct e1000_info e1000_ich9_info = {
 	.flags			= FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_IS_ICH
 				  | FLAG_HAS_WOL
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_ERT
@@ -4095,7 +4093,6 @@ struct e1000_info e1000_ich10_info = {
 	.flags			= FLAG_HAS_JUMBO_FRAMES
 				  | FLAG_IS_ICH
 				  | FLAG_HAS_WOL
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_ERT
@@ -4113,7 +4110,6 @@ struct e1000_info e1000_pch_info = {
 	.mac			= e1000_pchlan,
 	.flags			= FLAG_IS_ICH
 				  | FLAG_HAS_WOL
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_FLASH
@@ -4133,7 +4129,6 @@ struct e1000_info e1000_pch2_info = {
 	.mac			= e1000_pch2lan,
 	.flags			= FLAG_IS_ICH
 				  | FLAG_HAS_WOL
-				  | FLAG_RX_CSUM_ENABLED
 				  | FLAG_HAS_CTRLEXT_ON_LOAD
 				  | FLAG_HAS_AMT
 				  | FLAG_HAS_FLASH
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 9742bc6..4f66999 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -3069,7 +3069,7 @@ static void e1000_configure_rx(struct e1000_adapter *adapter)
 
 	/* Enable Receive Checksum Offload for TCP and UDP */
 	rxcsum = er32(RXCSUM);
-	if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
+	if (adapter->netdev->features & NETIF_F_RXCSUM) {
 		rxcsum |= E1000_RXCSUM_TUOFL;
 
 		/*
@@ -5860,6 +5860,26 @@ static void e1000_eeprom_checks(struct e1000_adapter *adapter)
 	}
 }
 
+static int e1000_set_features(struct net_device *netdev, u32 features)
+{
+	struct e1000_adapter *adapter = netdev_priv(netdev);
+	u32 changed = features ^ netdev->features;
+
+	if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
+		adapter->flags |= FLAG_TSO_FORCE;
+
+	if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
+			 NETIF_F_RXCSUM)))
+		return 0;
+
+	if (netif_running(netdev))
+		e1000e_reinit_locked(adapter);
+	else
+		e1000e_reset(adapter);
+
+	return 0;
+}
+
 static const struct net_device_ops e1000e_netdev_ops = {
 	.ndo_open		= e1000_open,
 	.ndo_stop		= e1000_close,
@@ -5877,6 +5897,7 @@ static const struct net_device_ops e1000e_netdev_ops = {
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= e1000_netpoll,
 #endif
+	.ndo_set_features = e1000_set_features,
 };
 
 /**
@@ -6036,21 +6057,25 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
 	if (e1000_check_reset_block(&adapter->hw))
 		e_info("PHY reset is blocked due to SOL/IDER session.\n");
 
-	netdev->features = NETIF_F_SG |
-			   NETIF_F_HW_CSUM |
-			   NETIF_F_HW_VLAN_TX |
-			   NETIF_F_HW_VLAN_RX;
+	/* Set initial default active device features */
+	netdev->features = (NETIF_F_SG |
+			    NETIF_F_HW_VLAN_RX |
+			    NETIF_F_HW_VLAN_TX |
+			    NETIF_F_TSO |
+			    NETIF_F_TSO6 |
+			    NETIF_F_RXCSUM |
+			    NETIF_F_HW_CSUM);
+
+	/* Set user-changeable features (subset of all device features) */
+	netdev->hw_features = netdev->features;
 
 	if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
 		netdev->features |= NETIF_F_HW_VLAN_FILTER;
 
-	netdev->features |= NETIF_F_TSO;
-	netdev->features |= NETIF_F_TSO6;
-
-	netdev->vlan_features |= NETIF_F_TSO;
-	netdev->vlan_features |= NETIF_F_TSO6;
-	netdev->vlan_features |= NETIF_F_HW_CSUM;
-	netdev->vlan_features |= NETIF_F_SG;
+	netdev->vlan_features |= (NETIF_F_SG |
+				  NETIF_F_TSO |
+				  NETIF_F_TSO6 |
+				  NETIF_F_HW_CSUM);
 
 	if (pci_using_dac) {
 		netdev->features |= NETIF_F_HIGHDMA;
-- 
1.7.6

[net-next 2/6] ixgbevf: Check if EOP has changed before using it

[Jeff Kirsher]

From: Greg Rose <gregory.v.rose@intel.com>

There is a chance that between the time EOP is read and the time it is
used another transmit on a different CPU could have run and completed,
thus leaving EOP in a bad state.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index b1e1c2d..936532f 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -203,6 +203,9 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
 	       (count < tx_ring->work_limit)) {
 		bool cleaned = false;
 		rmb(); /* read buffer_info after eop_desc */
+		/* eop could change between read and DD-check */
+		if (unlikely(eop != tx_ring->tx_buffer_info[i].next_to_watch))
+			goto cont_loop;
 		for ( ; !cleaned; count++) {
 			struct sk_buff *skb;
 			tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
@@ -232,6 +235,7 @@ static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
 				i = 0;
 		}
 
+cont_loop:
 		eop = tx_ring->tx_buffer_info[i].next_to_watch;
 		eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 	}
-- 
1.7.6

[net-next 3/6] ixgbevf: provide 64 bit statistics

[Jeff Kirsher]

From: Eric Dumazet <eric.dumazet@gmail.com>

Compute statistics per ring using 64 bits, and provide
network device stats in 64 bits.

It should make this driver multiqueue operations faster (no more cache
line ping pongs on netdev->stats structure)

Use u64_stats_sync infrastructure so that its safe on 32bit arches as
well.

Based on a prior patch from Stephen Hemminger

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbevf/ixgbevf.h      |    8 ++-
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |   52 +++++++++++++++++----
 2 files changed, 48 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
index 8857df4..e6c9d1a 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf.h
@@ -34,6 +34,7 @@
 #include <linux/io.h>
 #include <linux/netdevice.h>
 #include <linux/if_vlan.h>
+#include <linux/u64_stats_sync.h>
 
 #include "vf.h"
 
@@ -71,12 +72,13 @@ struct ixgbevf_ring {
 		struct ixgbevf_rx_buffer *rx_buffer_info;
 	};
 
+	u64			total_bytes;
+	u64			total_packets;
+	struct u64_stats_sync	syncp;
+
 	u16 head;
 	u16 tail;
 
-	unsigned int total_bytes;
-	unsigned int total_packets;
-
 	u16 reg_idx; /* holds the special value that gets the hardware register
 		      * offset associated with this ring, which is different
 		      * for DCB and RSS modes */
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 936532f..bc12dd8 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -270,11 +270,10 @@ cont_loop:
 		IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx);
 	}
 
+	u64_stats_update_begin(&tx_ring->syncp);
 	tx_ring->total_bytes += total_bytes;
 	tx_ring->total_packets += total_packets;
-
-	netdev->stats.tx_bytes += total_bytes;
-	netdev->stats.tx_packets += total_packets;
+	u64_stats_update_end(&tx_ring->syncp);
 
 	return count < tx_ring->work_limit;
 }
@@ -597,10 +596,10 @@ next_desc:
 	if (cleaned_count)
 		ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 
+	u64_stats_update_begin(&rx_ring->syncp);
 	rx_ring->total_packets += total_rx_packets;
 	rx_ring->total_bytes += total_rx_bytes;
-	adapter->netdev->stats.rx_bytes += total_rx_bytes;
-	adapter->netdev->stats.rx_packets += total_rx_packets;
+	u64_stats_update_end(&rx_ring->syncp);
 
 	return cleaned;
 }
@@ -2260,10 +2259,6 @@ void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
 				adapter->stats.vfgotc);
 	UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
 				adapter->stats.vfmprc);
-
-	/* Fill out the OS statistics structure */
-	adapter->netdev->stats.multicast = adapter->stats.vfmprc -
-		adapter->stats.base_vfmprc;
 }
 
 /**
@@ -3220,11 +3215,50 @@ static void ixgbevf_shutdown(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
+static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
+						struct rtnl_link_stats64 *stats)
+{
+	struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+	unsigned int start;
+	u64 bytes, packets;
+	const struct ixgbevf_ring *ring;
+	int i;
+
+	ixgbevf_update_stats(adapter);
+
+	stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
+
+	for (i = 0; i < adapter->num_rx_queues; i++) {
+		ring = &adapter->rx_ring[i];
+		do {
+			start = u64_stats_fetch_begin_bh(&ring->syncp);
+			bytes = ring->total_bytes;
+			packets = ring->total_packets;
+		} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
+		stats->rx_bytes += bytes;
+		stats->rx_packets += packets;
+	}
+
+	for (i = 0; i < adapter->num_tx_queues; i++) {
+		ring = &adapter->tx_ring[i];
+		do {
+			start = u64_stats_fetch_begin_bh(&ring->syncp);
+			bytes = ring->total_bytes;
+			packets = ring->total_packets;
+		} while (u64_stats_fetch_retry_bh(&ring->syncp, start));
+		stats->tx_bytes += bytes;
+		stats->tx_packets += packets;
+	}
+
+	return stats;
+}
+
 static const struct net_device_ops ixgbe_netdev_ops = {
 	.ndo_open		= ixgbevf_open,
 	.ndo_stop		= ixgbevf_close,
 	.ndo_start_xmit		= ixgbevf_xmit_frame,
 	.ndo_set_rx_mode	= ixgbevf_set_rx_mode,
+	.ndo_get_stats64	= ixgbevf_get_stats,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_mac_address	= ixgbevf_set_mac,
 	.ndo_change_mtu		= ixgbevf_change_mtu,
-- 
1.7.6

[net-next 4/6] ixgbevf: convert to ndo_fix_features

[Jeff Kirsher]

From: Michał Mirosław <mirq-linux@rere.qmqm.pl>

Private rx_csum flags are now duplicate of netdev->features & NETIF_F_RXCSUM.
Removing this needs deeper surgery.

Since ixgbevf doesn't change hardware state on RX csum enable/disable
its reset is avoided.

Things noticed:
 - HW VLAN acceleration probably can be toggled, but it's left as is
 - the resets on RX csum offload change can probably be avoided
 - there is A LOT of copy-and-pasted code here

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbevf/ethtool.c      |   46 ---------------------
 drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |   25 +++++++++--
 2 files changed, 20 insertions(+), 51 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ethtool.c b/drivers/net/ethernet/intel/ixgbevf/ethtool.c
index deee375..e1d9e3b 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ethtool.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ethtool.c
@@ -117,44 +117,6 @@ static int ixgbevf_get_settings(struct net_device *netdev,
 	return 0;
 }
 
-static u32 ixgbevf_get_rx_csum(struct net_device *netdev)
-{
-	struct ixgbevf_adapter *adapter = netdev_priv(netdev);
-	return adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED;
-}
-
-static int ixgbevf_set_rx_csum(struct net_device *netdev, u32 data)
-{
-	struct ixgbevf_adapter *adapter = netdev_priv(netdev);
-	if (data)
-		adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
-	else
-		adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
-
-	if (netif_running(netdev)) {
-		if (!adapter->dev_closed)
-			ixgbevf_reinit_locked(adapter);
-	} else {
-		ixgbevf_reset(adapter);
-	}
-
-	return 0;
-}
-
-static int ixgbevf_set_tso(struct net_device *netdev, u32 data)
-{
-	if (data) {
-		netdev->features |= NETIF_F_TSO;
-		netdev->features |= NETIF_F_TSO6;
-	} else {
-		netif_tx_stop_all_queues(netdev);
-		netdev->features &= ~NETIF_F_TSO;
-		netdev->features &= ~NETIF_F_TSO6;
-		netif_tx_start_all_queues(netdev);
-	}
-	return 0;
-}
-
 static u32 ixgbevf_get_msglevel(struct net_device *netdev)
 {
 	struct ixgbevf_adapter *adapter = netdev_priv(netdev);
@@ -720,16 +682,8 @@ static struct ethtool_ops ixgbevf_ethtool_ops = {
 	.get_link               = ethtool_op_get_link,
 	.get_ringparam          = ixgbevf_get_ringparam,
 	.set_ringparam          = ixgbevf_set_ringparam,
-	.get_rx_csum            = ixgbevf_get_rx_csum,
-	.set_rx_csum            = ixgbevf_set_rx_csum,
-	.get_tx_csum            = ethtool_op_get_tx_csum,
-	.set_tx_csum            = ethtool_op_set_tx_ipv6_csum,
-	.get_sg                 = ethtool_op_get_sg,
-	.set_sg                 = ethtool_op_set_sg,
 	.get_msglevel           = ixgbevf_get_msglevel,
 	.set_msglevel           = ixgbevf_set_msglevel,
-	.get_tso                = ethtool_op_get_tso,
-	.set_tso                = ixgbevf_set_tso,
 	.self_test              = ixgbevf_diag_test,
 	.get_sset_count         = ixgbevf_get_sset_count,
 	.get_strings            = ixgbevf_get_strings,
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index bc12dd8..9896397 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -3253,6 +3253,18 @@ static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
 	return stats;
 }
 
+static int ixgbevf_set_features(struct net_device *netdev, u32 features)
+{
+	struct ixgbevf_adapter *adapter = netdev_priv(netdev);
+
+	if (features & NETIF_F_RXCSUM)
+		adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
+	else
+		adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
+
+	return 0;
+}
+
 static const struct net_device_ops ixgbe_netdev_ops = {
 	.ndo_open		= ixgbevf_open,
 	.ndo_stop		= ixgbevf_close,
@@ -3265,6 +3277,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
 	.ndo_tx_timeout		= ixgbevf_tx_timeout,
 	.ndo_vlan_rx_add_vid	= ixgbevf_vlan_rx_add_vid,
 	.ndo_vlan_rx_kill_vid	= ixgbevf_vlan_rx_kill_vid,
+	.ndo_set_features	= ixgbevf_set_features,
 };
 
 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
@@ -3377,16 +3390,18 @@ static int __devinit ixgbevf_probe(struct pci_dev *pdev,
 	/* setup the private structure */
 	err = ixgbevf_sw_init(adapter);
 
-	netdev->features = NETIF_F_SG |
+	netdev->hw_features = NETIF_F_SG |
 			   NETIF_F_IP_CSUM |
+			   NETIF_F_IPV6_CSUM |
+			   NETIF_F_TSO |
+			   NETIF_F_TSO6 |
+			   NETIF_F_RXCSUM;
+
+	netdev->features = netdev->hw_features |
 			   NETIF_F_HW_VLAN_TX |
 			   NETIF_F_HW_VLAN_RX |
 			   NETIF_F_HW_VLAN_FILTER;
 
-	netdev->features |= NETIF_F_IPV6_CSUM;
-	netdev->features |= NETIF_F_TSO;
-	netdev->features |= NETIF_F_TSO6;
-	netdev->features |= NETIF_F_GRO;
 	netdev->vlan_features |= NETIF_F_TSO;
 	netdev->vlan_features |= NETIF_F_TSO6;
 	netdev->vlan_features |= NETIF_F_IP_CSUM;
-- 
1.7.6

[net-next 5/6] ixgbe: Simplify transmit cleanup path

[Jeff Kirsher]

From: Alexander Duyck <alexander.h.duyck@intel.com>

This patch helps to simplify the work being done by the transmit path by
removing the unnecessary compares between count and the work limit.  Instead
we can simplify this by just adding a budget value that will act as a count
down from the work limit value.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index e8aad76..e5a4eb6 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -804,13 +804,13 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 	struct ixgbe_tx_buffer *tx_buffer;
 	union ixgbe_adv_tx_desc *tx_desc;
 	unsigned int total_bytes = 0, total_packets = 0;
+	u16 budget = q_vector->tx.work_limit;
 	u16 i = tx_ring->next_to_clean;
-	u16 count;
 
 	tx_buffer = &tx_ring->tx_buffer_info[i];
 	tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
 
-	for (count = 0; count < q_vector->tx.work_limit; count++) {
+	for (; budget; budget--) {
 		union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
 
 		/* if next_to_watch is not set then there is no work pending */
@@ -891,11 +891,11 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 		ixgbe_tx_timeout_reset(adapter);
 
 		/* the adapter is about to reset, no point in enabling stuff */
-		return true;
+		return budget;
 	}
 
 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
-	if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
+	if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
 		     (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
 		/* Make sure that anybody stopping the queue after this
 		 * sees the new next_to_clean.
@@ -908,7 +908,7 @@ static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 		}
 	}
 
-	return count < q_vector->tx.work_limit;
+	return budget;
 }
 
 #ifdef CONFIG_IXGBE_DCA
-- 
1.7.6

[net-next 6/6] ixgbe: convert rings from q_vector bit indexed array to linked list

[Jeff Kirsher]

From: Alexander Duyck <alexander.h.duyck@intel.com>

This change converts the current bit array into a linked list so that the
q_vectors can simply go through ring by ring and locate each ring needing
to be cleaned.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe.h      |    7 +-
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |  192 ++++++++-----------------
 2 files changed, 60 insertions(+), 139 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 378ce46..dc3b12e 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -209,6 +209,7 @@ enum ixbge_ring_state_t {
 #define clear_ring_rsc_enabled(ring) \
 	clear_bit(__IXGBE_RX_RSC_ENABLED, &(ring)->state)
 struct ixgbe_ring {
+	struct ixgbe_ring *next;	/* pointer to next ring in q_vector */
 	void *desc;			/* descriptor ring memory */
 	struct device *dev;             /* device for DMA mapping */
 	struct net_device *netdev;      /* netdev ring belongs to */
@@ -277,11 +278,7 @@ struct ixgbe_ring_feature {
 } ____cacheline_internodealigned_in_smp;
 
 struct ixgbe_ring_container {
-#if MAX_RX_QUEUES > MAX_TX_QUEUES
-	DECLARE_BITMAP(idx, MAX_RX_QUEUES);
-#else
-	DECLARE_BITMAP(idx, MAX_TX_QUEUES);
-#endif
+	struct ixgbe_ring *ring;	/* pointer to linked list of rings */
 	unsigned int total_bytes;	/* total bytes processed this int */
 	unsigned int total_packets;	/* total packets processed this int */
 	u16 work_limit;			/* total work allowed per interrupt */
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index e5a4eb6..bb54d3d 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -974,26 +974,17 @@ static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
 {
 	struct ixgbe_adapter *adapter = q_vector->adapter;
+	struct ixgbe_ring *ring;
 	int cpu = get_cpu();
-	long r_idx;
-	int i;
 
 	if (q_vector->cpu == cpu)
 		goto out_no_update;
 
-	r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
-	for (i = 0; i < q_vector->tx.count; i++) {
-		ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
-		r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
-				      r_idx + 1);
-	}
+	for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
+		ixgbe_update_tx_dca(adapter, ring, cpu);
 
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	for (i = 0; i < q_vector->rx.count; i++) {
-		ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
-		r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
-				      r_idx + 1);
-	}
+	for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
+		ixgbe_update_rx_dca(adapter, ring, cpu);
 
 	q_vector->cpu = cpu;
 out_no_update:
@@ -1546,7 +1537,7 @@ static int ixgbe_clean_rxonly(struct napi_struct *, int);
 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 {
 	struct ixgbe_q_vector *q_vector;
-	int i, q_vectors, v_idx, r_idx;
+	int q_vectors, v_idx;
 	u32 mask;
 
 	q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
@@ -1556,33 +1547,19 @@ static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 	 * corresponding register.
 	 */
 	for (v_idx = 0; v_idx < q_vectors; v_idx++) {
+		struct ixgbe_ring *ring;
 		q_vector = adapter->q_vector[v_idx];
-		/* XXX for_each_set_bit(...) */
-		r_idx = find_first_bit(q_vector->rx.idx,
-				       adapter->num_rx_queues);
-
-		for (i = 0; i < q_vector->rx.count; i++) {
-			u8 reg_idx = adapter->rx_ring[r_idx]->reg_idx;
-			ixgbe_set_ivar(adapter, 0, reg_idx, v_idx);
-			r_idx = find_next_bit(q_vector->rx.idx,
-					      adapter->num_rx_queues,
-					      r_idx + 1);
-		}
-		r_idx = find_first_bit(q_vector->tx.idx,
-				       adapter->num_tx_queues);
-
-		for (i = 0; i < q_vector->tx.count; i++) {
-			u8 reg_idx = adapter->tx_ring[r_idx]->reg_idx;
-			ixgbe_set_ivar(adapter, 1, reg_idx, v_idx);
-			r_idx = find_next_bit(q_vector->tx.idx,
-					      adapter->num_tx_queues,
-					      r_idx + 1);
-		}
 
-		if (q_vector->tx.count && !q_vector->rx.count)
+		for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
+			ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
+
+		for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
+			ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
+
+		if (q_vector->tx.ring && !q_vector->rx.ring)
 			/* tx only */
 			q_vector->eitr = adapter->tx_eitr_param;
-		else if (q_vector->rx.count)
+		else if (q_vector->rx.ring)
 			/* rx or mixed */
 			q_vector->eitr = adapter->rx_eitr_param;
 
@@ -2006,20 +1983,10 @@ static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 {
 	struct ixgbe_q_vector *q_vector = data;
-	struct ixgbe_adapter  *adapter = q_vector->adapter;
-	struct ixgbe_ring     *tx_ring;
-	int i, r_idx;
 
 	if (!q_vector->tx.count)
 		return IRQ_HANDLED;
 
-	r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
-	for (i = 0; i < q_vector->tx.count; i++) {
-		tx_ring = adapter->tx_ring[r_idx];
-		r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
-				      r_idx + 1);
-	}
-
 	/* EIAM disabled interrupts (on this vector) for us */
 	napi_schedule(&q_vector->napi);
 
@@ -2034,22 +2001,6 @@ static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 {
 	struct ixgbe_q_vector *q_vector = data;
-	struct ixgbe_adapter  *adapter = q_vector->adapter;
-	struct ixgbe_ring  *rx_ring;
-	int r_idx;
-	int i;
-
-#ifdef CONFIG_IXGBE_DCA
-	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
-		ixgbe_update_dca(q_vector);
-#endif
-
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	for (i = 0; i < q_vector->rx.count; i++) {
-		rx_ring = adapter->rx_ring[r_idx];
-		r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
-				      r_idx + 1);
-	}
 
 	if (!q_vector->rx.count)
 		return IRQ_HANDLED;
@@ -2063,28 +2014,10 @@ static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
 {
 	struct ixgbe_q_vector *q_vector = data;
-	struct ixgbe_adapter  *adapter = q_vector->adapter;
-	struct ixgbe_ring  *ring;
-	int r_idx;
-	int i;
 
 	if (!q_vector->tx.count && !q_vector->rx.count)
 		return IRQ_HANDLED;
 
-	r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
-	for (i = 0; i < q_vector->tx.count; i++) {
-		ring = adapter->tx_ring[r_idx];
-		r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
-				      r_idx + 1);
-	}
-
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	for (i = 0; i < q_vector->rx.count; i++) {
-		ring = adapter->rx_ring[r_idx];
-		r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
-				      r_idx + 1);
-	}
-
 	/* EIAM disabled interrupts (on this vector) for us */
 	napi_schedule(&q_vector->napi);
 
@@ -2104,19 +2037,14 @@ static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 	struct ixgbe_q_vector *q_vector =
 			       container_of(napi, struct ixgbe_q_vector, napi);
 	struct ixgbe_adapter *adapter = q_vector->adapter;
-	struct ixgbe_ring *rx_ring = NULL;
 	int work_done = 0;
-	long r_idx;
 
 #ifdef CONFIG_IXGBE_DCA
 	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 		ixgbe_update_dca(q_vector);
 #endif
 
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	rx_ring = adapter->rx_ring[r_idx];
-
-	ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
+	ixgbe_clean_rx_irq(q_vector, q_vector->rx.ring, &work_done, budget);
 
 	/* If all Rx work done, exit the polling mode */
 	if (work_done < budget) {
@@ -2144,38 +2072,29 @@ static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
 	struct ixgbe_q_vector *q_vector =
 			       container_of(napi, struct ixgbe_q_vector, napi);
 	struct ixgbe_adapter *adapter = q_vector->adapter;
-	struct ixgbe_ring *ring = NULL;
-	int work_done = 0, i;
-	long r_idx;
-	bool tx_clean_complete = true;
+	struct ixgbe_ring *ring;
+	int work_done = 0;
+	bool clean_complete = true;
 
 #ifdef CONFIG_IXGBE_DCA
 	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 		ixgbe_update_dca(q_vector);
 #endif
 
-	r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
-	for (i = 0; i < q_vector->tx.count; i++) {
-		ring = adapter->tx_ring[r_idx];
-		tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
-		r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
-				      r_idx + 1);
-	}
+	for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
+		clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
 
 	/* attempt to distribute budget to each queue fairly, but don't allow
 	 * the budget to go below 1 because we'll exit polling */
 	budget /= (q_vector->rx.count ?: 1);
 	budget = max(budget, 1);
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	for (i = 0; i < q_vector->rx.count; i++) {
-		ring = adapter->rx_ring[r_idx];
+
+	for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
 		ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
-		r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
-				      r_idx + 1);
-	}
 
-	r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
-	ring = adapter->rx_ring[r_idx];
+	if (!clean_complete)
+		work_done = budget;
+
 	/* If all Rx work done, exit the polling mode */
 	if (work_done < budget) {
 		napi_complete(napi);
@@ -2203,32 +2122,23 @@ static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
 	struct ixgbe_q_vector *q_vector =
 			       container_of(napi, struct ixgbe_q_vector, napi);
 	struct ixgbe_adapter *adapter = q_vector->adapter;
-	struct ixgbe_ring *tx_ring = NULL;
-	int work_done = 0;
-	long r_idx;
 
 #ifdef CONFIG_IXGBE_DCA
 	if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 		ixgbe_update_dca(q_vector);
 #endif
 
-	r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
-	tx_ring = adapter->tx_ring[r_idx];
-
-	if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
-		work_done = budget;
+	if (!ixgbe_clean_tx_irq(q_vector, q_vector->tx.ring))
+		return budget;
 
 	/* If all Tx work done, exit the polling mode */
-	if (work_done < budget) {
-		napi_complete(napi);
-		if (adapter->tx_itr_setting & 1)
-			ixgbe_set_itr(q_vector);
-		if (!test_bit(__IXGBE_DOWN, &adapter->state))
-			ixgbe_irq_enable_queues(adapter,
-						((u64)1 << q_vector->v_idx));
-	}
+	napi_complete(napi);
+	if (adapter->tx_itr_setting & 1)
+		ixgbe_set_itr(q_vector);
+	if (!test_bit(__IXGBE_DOWN, &adapter->state))
+		ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
 
-	return work_done;
+	return 0;
 }
 
 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
@@ -2237,9 +2147,10 @@ static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
 	struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
 	struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
 
-	set_bit(r_idx, q_vector->rx.idx);
-	q_vector->rx.count++;
 	rx_ring->q_vector = q_vector;
+	rx_ring->next = q_vector->rx.ring;
+	q_vector->rx.ring = rx_ring;
+	q_vector->rx.count++;
 }
 
 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
@@ -2248,9 +2159,10 @@ static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
 	struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
 	struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
 
-	set_bit(t_idx, q_vector->tx.idx);
-	q_vector->tx.count++;
 	tx_ring->q_vector = q_vector;
+	tx_ring->next = q_vector->tx.ring;
+	q_vector->tx.ring = tx_ring;
+	q_vector->tx.count++;
 	q_vector->tx.work_limit = a->tx_work_limit;
 }
 
@@ -2508,14 +2420,26 @@ static irqreturn_t ixgbe_intr(int irq, void *data)
 
 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
 {
-	int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
+	int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
+	int i;
+
+	/* legacy and MSI only use one vector */
+	if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
+		q_vectors = 1;
+
+	for (i = 0; i < adapter->num_rx_queues; i++) {
+		adapter->rx_ring[i]->q_vector = NULL;
+		adapter->rx_ring[i]->next = NULL;
+	}
+	for (i = 0; i < adapter->num_tx_queues; i++) {
+		adapter->tx_ring[i]->q_vector = NULL;
+		adapter->tx_ring[i]->next = NULL;
+	}
 
 	for (i = 0; i < q_vectors; i++) {
 		struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
-		bitmap_zero(q_vector->rx.idx, MAX_RX_QUEUES);
-		bitmap_zero(q_vector->tx.idx, MAX_TX_QUEUES);
-		q_vector->rx.count = 0;
-		q_vector->tx.count = 0;
+		memset(&q_vector->rx, 0, sizeof(struct ixgbe_ring_container));
+		memset(&q_vector->tx, 0, sizeof(struct ixgbe_ring_container));
 	}
 }
 
@@ -5923,7 +5847,7 @@ static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
 		/* get one bit for every active tx/rx interrupt vector */
 		for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
 			struct ixgbe_q_vector *qv = adapter->q_vector[i];
-			if (qv->rx.count || qv->tx.count)
+			if (qv->rx.ring || qv->tx.ring)
 				eics |= ((u64)1 << i);
 		}
 	}
-- 
1.7.6

Re: [net-next 0/6][pull request] Intel Wired LAN Driver Update

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Sat, 27 Aug 2011 00:09:25 -0700

> The following series contains updates to e1000e, ixgbe and ixgbevf.
> 
> The following are changes since commit 3cd0999d134235d64b175edd2eb1d46ebc97b377:
>   Merge branch 'davem-next.mii' of git://git.kernel.org/pub/scm/linux/kernel/git/romieu/netdev-2.6
> and are available in the git repository at:
>   master.kernel.org:/pub/scm/linux/kernel/git/jkirsher/net-next master

Pulled.