Release 4.11 drivers/net/ethernet/intel/ixgb/ixgb_main.c

/*******************************************************************************

  Intel PRO/10GbE Linux driver
  Copyright(c) 1999 - 2008 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/prefetch.h>
#include "ixgb.h"


char ixgb_driver_name[] = "ixgb";

static char ixgb_driver_string[] = "Intel(R) PRO/10GbE Network Driver";


#define DRIVERNAPI "-NAPI"

#define DRV_VERSION "1.0.135-k2" DRIVERNAPI

const char ixgb_driver_version[] = DRV_VERSION;

static const char ixgb_copyright[] = "Copyright (c) 1999-2008 Intel Corporation.";


#define IXGB_CB_LENGTH 256

static unsigned int copybreak __read_mostly = IXGB_CB_LENGTH;
module_param(copybreak, uint, 0644);
MODULE_PARM_DESC(copybreak,
	"Maximum size of packet that is copied to a new buffer on receive");

/* ixgb_pci_tbl - PCI Device ID Table
 *
 * Wildcard entries (PCI_ANY_ID) should come last
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */

static const struct pci_device_id ixgb_pci_tbl[] = {
	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_CX4,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_SR,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{PCI_VENDOR_ID_INTEL, IXGB_DEVICE_ID_82597EX_LR,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},

	/* required last entry */
	{0,}
};

MODULE_DEVICE_TABLE(pci, ixgb_pci_tbl);

/* Local Function Prototypes */
static int ixgb_init_module(void);
static void ixgb_exit_module(void);
static int ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void ixgb_remove(struct pci_dev *pdev);
static int ixgb_sw_init(struct ixgb_adapter *adapter);
static int ixgb_open(struct net_device *netdev);
static int ixgb_close(struct net_device *netdev);
static void ixgb_configure_tx(struct ixgb_adapter *adapter);
static void ixgb_configure_rx(struct ixgb_adapter *adapter);
static void ixgb_setup_rctl(struct ixgb_adapter *adapter);
static void ixgb_clean_tx_ring(struct ixgb_adapter *adapter);
static void ixgb_clean_rx_ring(struct ixgb_adapter *adapter);
static void ixgb_set_multi(struct net_device *netdev);
static void ixgb_watchdog(unsigned long data);
static netdev_tx_t ixgb_xmit_frame(struct sk_buff *skb,
				   struct net_device *netdev);
static struct net_device_stats *ixgb_get_stats(struct net_device *netdev);
static int ixgb_change_mtu(struct net_device *netdev, int new_mtu);
static int ixgb_set_mac(struct net_device *netdev, void *p);
static irqreturn_t ixgb_intr(int irq, void *data);
static bool ixgb_clean_tx_irq(struct ixgb_adapter *adapter);

static int ixgb_clean(struct napi_struct *, int);
static bool ixgb_clean_rx_irq(struct ixgb_adapter *, int *, int);
static void ixgb_alloc_rx_buffers(struct ixgb_adapter *, int);

static void ixgb_tx_timeout(struct net_device *dev);
static void ixgb_tx_timeout_task(struct work_struct *work);

static void ixgb_vlan_strip_enable(struct ixgb_adapter *adapter);
static void ixgb_vlan_strip_disable(struct ixgb_adapter *adapter);
static int ixgb_vlan_rx_add_vid(struct net_device *netdev,
				__be16 proto, u16 vid);
static int ixgb_vlan_rx_kill_vid(struct net_device *netdev,
				 __be16 proto, u16 vid);
static void ixgb_restore_vlan(struct ixgb_adapter *adapter);

#ifdef CONFIG_NET_POLL_CONTROLLER
/* for netdump / net console */
static void ixgb_netpoll(struct net_device *dev);
#endif

static pci_ers_result_t ixgb_io_error_detected (struct pci_dev *pdev,
                             enum pci_channel_state state);
static pci_ers_result_t ixgb_io_slot_reset (struct pci_dev *pdev);
static void ixgb_io_resume (struct pci_dev *pdev);


static const struct pci_error_handlers ixgb_err_handler = {
	.error_detected = ixgb_io_error_detected,
	.slot_reset = ixgb_io_slot_reset,
	.resume = ixgb_io_resume,
};


static struct pci_driver ixgb_driver = {
	.name     = ixgb_driver_name,
	.id_table = ixgb_pci_tbl,
	.probe    = ixgb_probe,
	.remove   = ixgb_remove,
	.err_handler = &ixgb_err_handler
};

MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
MODULE_DESCRIPTION("Intel(R) PRO/10GbE Network Driver");
MODULE_LICENSE("GPL");

MODULE_VERSION(DRV_VERSION);


#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)

static int debug = -1;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

/**
 * ixgb_init_module - Driver Registration Routine
 *
 * ixgb_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/


static int __init

ixgb_init_module(void)
{
	pr_info("%s - version %s\n", ixgb_driver_string, ixgb_driver_version);
	pr_info("%s\n", ixgb_copyright);

	return pci_register_driver(&ixgb_driver);
}

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module_init(ixgb_init_module);

/**
 * ixgb_exit_module - Driver Exit Cleanup Routine
 *
 * ixgb_exit_module is called just before the driver is removed
 * from memory.
 **/


static void __exit

ixgb_exit_module(void)
{
	pci_unregister_driver(&ixgb_driver);
}

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module_exit(ixgb_exit_module);

/**
 * ixgb_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/


static void

ixgb_irq_disable(struct ixgb_adapter *adapter)
{
	IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
	IXGB_WRITE_FLUSH(&adapter->hw);
	synchronize_irq(adapter->pdev->irq);
}

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/**
 * ixgb_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/


static void

ixgb_irq_enable(struct ixgb_adapter *adapter)
{
	u32 val = IXGB_INT_RXT0 | IXGB_INT_RXDMT0 |
		  IXGB_INT_TXDW | IXGB_INT_LSC;
	if (adapter->hw.subsystem_vendor_id == PCI_VENDOR_ID_SUN)
		val |= IXGB_INT_GPI0;
	IXGB_WRITE_REG(&adapter->hw, IMS, val);
	IXGB_WRITE_FLUSH(&adapter->hw);
}

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int

ixgb_up(struct ixgb_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int err, irq_flags = IRQF_SHARED;
	int max_frame = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
	struct ixgb_hw *hw = &adapter->hw;

	/* hardware has been reset, we need to reload some things */

	ixgb_rar_set(hw, netdev->dev_addr, 0);
	ixgb_set_multi(netdev);

	ixgb_restore_vlan(adapter);

	ixgb_configure_tx(adapter);
	ixgb_setup_rctl(adapter);
	ixgb_configure_rx(adapter);
	ixgb_alloc_rx_buffers(adapter, IXGB_DESC_UNUSED(&adapter->rx_ring));

	/* disable interrupts and get the hardware into a known state */
	IXGB_WRITE_REG(&adapter->hw, IMC, 0xffffffff);

	/* only enable MSI if bus is in PCI-X mode */
	if (IXGB_READ_REG(&adapter->hw, STATUS) & IXGB_STATUS_PCIX_MODE) {
		err = pci_enable_msi(adapter->pdev);
		if (!err) {
			adapter->have_msi = true;
			irq_flags = 0;
		}
		/* proceed to try to request regular interrupt */
	}

	err = request_irq(adapter->pdev->irq, ixgb_intr, irq_flags,
	                  netdev->name, netdev);
	if (err) {
		if (adapter->have_msi)
			pci_disable_msi(adapter->pdev);
		netif_err(adapter, probe, adapter->netdev,
			  "Unable to allocate interrupt Error: %d\n", err);
		return err;
	}

	if ((hw->max_frame_size != max_frame) ||
		(hw->max_frame_size !=
		(IXGB_READ_REG(hw, MFS) >> IXGB_MFS_SHIFT))) {

		hw->max_frame_size = max_frame;

		IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);

		if (hw->max_frame_size >
		   IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
			u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);

			if (!(ctrl0 & IXGB_CTRL0_JFE)) {
				ctrl0 |= IXGB_CTRL0_JFE;
				IXGB_WRITE_REG(hw, CTRL0, ctrl0);
			}
		}
	}

	clear_bit(__IXGB_DOWN, &adapter->flags);

	napi_enable(&adapter->napi);
	ixgb_irq_enable(adapter);

	netif_wake_queue(netdev);

	mod_timer(&adapter->watchdog_timer, jiffies);

	return 0;
}

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26.67%
Jesse Brandeburg
27
7.78%
3
20.00%
Joe Perches
8
2.31%
2
13.33%
Stephen Hemminger
5
1.44%
1
6.67%
Mallikarjuna R Chilakala
3
0.86%
1
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void

ixgb_down(struct ixgb_adapter *adapter, bool kill_watchdog)
{
	struct net_device *netdev = adapter->netdev;

	/* prevent the interrupt handler from restarting watchdog */
	set_bit(__IXGB_DOWN, &adapter->flags);

	netif_carrier_off(netdev);

	napi_disable(&adapter->napi);
	/* waiting for NAPI to complete can re-enable interrupts */
	ixgb_irq_disable(adapter);
	free_irq(adapter->pdev->irq, netdev);

	if (adapter->have_msi)
		pci_disable_msi(adapter->pdev);

	if (kill_watchdog)
		del_timer_sync(&adapter->watchdog_timer);

	adapter->link_speed = 0;
	adapter->link_duplex = 0;
	netif_stop_queue(netdev);

	ixgb_reset(adapter);
	ixgb_clean_tx_ring(adapter);
	ixgb_clean_rx_ring(adapter);
}

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1
14.29%
Eliezer Tamir
5
4.17%
1
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void

ixgb_reset(struct ixgb_adapter *adapter)
{
	struct ixgb_hw *hw = &adapter->hw;

	ixgb_adapter_stop(hw);
	if (!ixgb_init_hw(hw))
		netif_err(adapter, probe, adapter->netdev, "ixgb_init_hw failed\n");

	/* restore frame size information */
	IXGB_WRITE_REG(hw, MFS, hw->max_frame_size << IXGB_MFS_SHIFT);
	if (hw->max_frame_size >
	    IXGB_MAX_ENET_FRAME_SIZE_WITHOUT_FCS + ENET_FCS_LENGTH) {
		u32 ctrl0 = IXGB_READ_REG(hw, CTRL0);
		if (!(ctrl0 & IXGB_CTRL0_JFE)) {
			ctrl0 |= IXGB_CTRL0_JFE;
			IXGB_WRITE_REG(hw, CTRL0, ctrl0);
		}
	}
}

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2
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1
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static netdev_features_t

ixgb_fix_features(struct net_device *netdev, netdev_features_t features)
{
	/*
         * Tx VLAN insertion does not work per HW design when Rx stripping is
         * disabled.
         */
	if (!(features & NETIF_F_HW_VLAN_CTAG_RX))
		features &= ~NETIF_F_HW_VLAN_CTAG_TX;

	return features;
}

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static int

ixgb_set_features(struct net_device *netdev, netdev_features_t features)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	netdev_features_t changed = features ^ netdev->features;

	if (!(changed & (NETIF_F_RXCSUM|NETIF_F_HW_VLAN_CTAG_RX)))
		return 0;

	adapter->rx_csum = !!(features & NETIF_F_RXCSUM);

	if (netif_running(netdev)) {
		ixgb_down(adapter, true);
		ixgb_up(adapter);
		ixgb_set_speed_duplex(netdev);
	} else
		ixgb_reset(adapter);

	return 0;
}


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static const struct net_device_ops ixgb_netdev_ops = {
	.ndo_open 		= ixgb_open,
	.ndo_stop		= ixgb_close,
	.ndo_start_xmit		= ixgb_xmit_frame,
	.ndo_get_stats		= ixgb_get_stats,
	.ndo_set_rx_mode	= ixgb_set_multi,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= ixgb_set_mac,
	.ndo_change_mtu		= ixgb_change_mtu,
	.ndo_tx_timeout		= ixgb_tx_timeout,
	.ndo_vlan_rx_add_vid	= ixgb_vlan_rx_add_vid,
	.ndo_vlan_rx_kill_vid	= ixgb_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= ixgb_netpoll,
#endif
	.ndo_fix_features       = ixgb_fix_features,
	.ndo_set_features       = ixgb_set_features,
};

/**
 * ixgb_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in ixgb_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * ixgb_probe initializes an adapter identified by a pci_dev structure.
 * The OS initialization, configuring of the adapter private structure,
 * and a hardware reset occur.
 **/


static int

ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct net_device *netdev = NULL;
	struct ixgb_adapter *adapter;
	static int cards_found = 0;
	int pci_using_dac;
	int i;
	int err;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	pci_using_dac = 0;
	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
	if (!err) {
		pci_using_dac = 1;
	} else {
		err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
		if (err) {
			pr_err("No usable DMA configuration, aborting\n");
			goto err_dma_mask;
		}
	}

	err = pci_request_regions(pdev, ixgb_driver_name);
	if (err)
		goto err_request_regions;

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct ixgb_adapter));
	if (!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_NETDEV_DEV(netdev, &pdev->dev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev_priv(netdev);
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.back = adapter;
	adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);

	adapter->hw.hw_addr = pci_ioremap_bar(pdev, BAR_0);
	if (!adapter->hw.hw_addr) {
		err = -EIO;
		goto err_ioremap;
	}

	for (i = BAR_1; i <= BAR_5; i++) {
		if (pci_resource_len(pdev, i) == 0)
			continue;
		if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
			adapter->hw.io_base = pci_resource_start(pdev, i);
			break;
		}
	}

	netdev->netdev_ops = &ixgb_netdev_ops;
	ixgb_set_ethtool_ops(netdev);
	netdev->watchdog_timeo = 5 * HZ;
	netif_napi_add(netdev, &adapter->napi, ixgb_clean, 64);

	strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);

	adapter->bd_number = cards_found;
	adapter->link_speed = 0;
	adapter->link_duplex = 0;

	/* setup the private structure */

	err = ixgb_sw_init(adapter);
	if (err)
		goto err_sw_init;

	netdev->hw_features = NETIF_F_SG |
			   NETIF_F_TSO |
			   NETIF_F_HW_CSUM |
			   NETIF_F_HW_VLAN_CTAG_TX |
			   NETIF_F_HW_VLAN_CTAG_RX;
	netdev->features = netdev->hw_features |
			   NETIF_F_HW_VLAN_CTAG_FILTER;
	netdev->hw_features |= NETIF_F_RXCSUM;

	if (pci_using_dac) {
		netdev->features |= NETIF_F_HIGHDMA;
		netdev->vlan_features |= NETIF_F_HIGHDMA;
	}

	/* MTU range: 68 - 16114 */
	netdev->min_mtu = ETH_MIN_MTU;
	netdev->max_mtu = IXGB_MAX_JUMBO_FRAME_SIZE - ETH_HLEN;

	/* make sure the EEPROM is good */

	if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
		netif_err(adapter, probe, adapter->netdev,
			  "The EEPROM Checksum Is Not Valid\n");
		err = -EIO;
		goto err_eeprom;
	}

	ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);

	if (!is_valid_ether_addr(netdev->dev_addr)) {
		netif_err(adapter, probe, adapter->netdev, "Invalid MAC Address\n");
		err = -EIO;
		goto err_eeprom;
	}

	adapter->part_num = ixgb_get_ee_pba_number(&adapter->hw);

	init_timer(&adapter->watchdog_timer);
	adapter->watchdog_timer.function = ixgb_watchdog;
	adapter->watchdog_timer.data = (unsigned long)adapter;

	INIT_WORK(&adapter->tx_timeout_task, ixgb_tx_timeout_task);

	strcpy(netdev->name, "eth%d");
	err = register_netdev(netdev);
	if (err)
		goto err_register;

	/* carrier off reporting is important to ethtool even BEFORE open */
	netif_carrier_off(netdev);

	netif_info(adapter, probe, adapter->netdev,
		   "Intel(R) PRO/10GbE Network Connection\n");
	ixgb_check_options(adapter);
	/* reset the hardware with the new settings */

	ixgb_reset(adapter);

	cards_found++;
	return 0;

err_register:
err_sw_init:
err_eeprom:
	iounmap(adapter->hw.hw_addr);
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_request_regions:
err_dma_mask:
	pci_disable_device(pdev);
	return err;
}

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0.44%
1
3.33%
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0.29%
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/**
 * ixgb_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * ixgb_remove is called by the PCI subsystem to alert the driver
 * that it should release a PCI device.  The could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/


static void

ixgb_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	cancel_work_sync(&adapter->tx_timeout_task);

	unregister_netdev(netdev);

	iounmap(adapter->hw.hw_addr);
	pci_release_regions(pdev);

	free_netdev(netdev);
	pci_disable_device(pdev);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
51
75.00%
1
16.67%
Tejun Heo
7
10.29%
1
16.67%
Emil Tantilov
5
7.35%
1
16.67%
Mallikarjuna R Chilakala
3
4.41%
1
16.67%
Stephen Hemminger
1
1.47%
1
16.67%
Jesse Brandeburg
1
1.47%
1
16.67%
Total
68
100.00%
6
100.00%

/**
 * ixgb_sw_init - Initialize general software structures (struct ixgb_adapter)
 * @adapter: board private structure to initialize
 *
 * ixgb_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 **/


static int

ixgb_sw_init(struct ixgb_adapter *adapter)
{
	struct ixgb_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;

	/* PCI config space info */

	hw->vendor_id = pdev->vendor;
	hw->device_id = pdev->device;
	hw->subsystem_vendor_id = pdev->subsystem_vendor;
	hw->subsystem_id = pdev->subsystem_device;

	hw->max_frame_size = netdev->mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;
	adapter->rx_buffer_len = hw->max_frame_size + 8; /* + 8 for errata */

	if ((hw->device_id == IXGB_DEVICE_ID_82597EX) ||
	    (hw->device_id == IXGB_DEVICE_ID_82597EX_CX4) ||
	    (hw->device_id == IXGB_DEVICE_ID_82597EX_LR) ||
	    (hw->device_id == IXGB_DEVICE_ID_82597EX_SR))
		hw->mac_type = ixgb_82597;
	else {
		/* should never have loaded on this device */
		netif_err(adapter, probe, adapter->netdev, "unsupported device id\n");
	}

	/* enable flow control to be programmed */
	hw->fc.send_xon = 1;

	set_bit(__IXGB_DOWN, &adapter->flags);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
109
62.64%
2
20.00%
Jeff Garzik
26
14.94%
2
20.00%
Auke-Jan H Kok
19
10.92%
3
30.00%
Jesse Brandeburg
13
7.47%
2
20.00%
Joe Perches
7
4.02%
1
10.00%
Total
174
100.00%
10
100.00%

/**
 * ixgb_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * Returns 0 on success, negative value on failure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the watchdog timer is started,
 * and the stack is notified that the interface is ready.
 **/


static int

ixgb_open(struct net_device *netdev)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	int err;

	/* allocate transmit descriptors */
	err = ixgb_setup_tx_resources(adapter);
	if (err)
		goto err_setup_tx;

	netif_carrier_off(netdev);

	/* allocate receive descriptors */

	err = ixgb_setup_rx_resources(adapter);
	if (err)
		goto err_setup_rx;

	err = ixgb_up(adapter);
	if (err)
		goto err_up;

	netif_start_queue(netdev);

	return 0;

err_up:
	ixgb_free_rx_resources(adapter);
err_setup_rx:
	ixgb_free_tx_resources(adapter);
err_setup_tx:
	ixgb_reset(adapter);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
69
65.71%
1
20.00%
Jesse Brandeburg
22
20.95%
2
40.00%
Jeff Garzik
11
10.48%
1
20.00%
Mallikarjuna R Chilakala
3
2.86%
1
20.00%
Total
105
100.00%
5
100.00%

/**
 * ixgb_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * Returns 0, this is not allowed to fail
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the drivers control, but
 * needs to be disabled.  A global MAC reset is issued to stop the
 * hardware, and all transmit and receive resources are freed.
 **/


static int

ixgb_close(struct net_device *netdev)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	ixgb_down(adapter, true);

	ixgb_free_tx_resources(adapter);
	ixgb_free_rx_resources(adapter);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
37
90.24%
1
33.33%
Mallikarjuna R Chilakala
3
7.32%
1
33.33%
Joe Perches
1
2.44%
1
33.33%
Total
41
100.00%
3
100.00%

/**
 * ixgb_setup_tx_resources - allocate Tx resources (Descriptors)
 * @adapter: board private structure
 *
 * Return 0 on success, negative on failure
 **/


int

ixgb_setup_tx_resources(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *txdr = &adapter->tx_ring;
	struct pci_dev *pdev = adapter->pdev;
	int size;

	size = sizeof(struct ixgb_buffer) * txdr->count;
	txdr->buffer_info = vzalloc(size);
	if (!txdr->buffer_info)
		return -ENOMEM;

	/* round up to nearest 4K */

	txdr->size = txdr->count * sizeof(struct ixgb_tx_desc);
	txdr->size = ALIGN(txdr->size, 4096);

	txdr->desc = dma_zalloc_coherent(&pdev->dev, txdr->size, &txdr->dma,
					 GFP_KERNEL);
	if (!txdr->desc) {
		vfree(txdr->buffer_info);
		return -ENOMEM;
	}

	txdr->next_to_use = 0;
	txdr->next_to_clean = 0;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
131
87.33%
3
37.50%
Jeff Garzik
7
4.67%
1
12.50%
Milind Arun Choudhary
5
3.33%
1
12.50%
Nicholas Nunley
5
3.33%
1
12.50%
Joe Perches
1
0.67%
1
12.50%
Eric Dumazet
1
0.67%
1
12.50%
Total
150
100.00%
8
100.00%

/**
 * ixgb_configure_tx - Configure 82597 Transmit Unit after Reset.
 * @adapter: board private structure
 *
 * Configure the Tx unit of the MAC after a reset.
 **/


static void

ixgb_configure_tx(struct ixgb_adapter *adapter)
{
	u64 tdba = adapter->tx_ring.dma;
	u32 tdlen = adapter->tx_ring.count * sizeof(struct ixgb_tx_desc);
	u32 tctl;
	struct ixgb_hw *hw = &adapter->hw;

	/* Setup the Base and Length of the Tx Descriptor Ring
         * tx_ring.dma can be either a 32 or 64 bit value
         */

	IXGB_WRITE_REG(hw, TDBAL, (tdba & 0x00000000ffffffffULL));
	IXGB_WRITE_REG(hw, TDBAH, (tdba >> 32));

	IXGB_WRITE_REG(hw, TDLEN, tdlen);

	/* Setup the HW Tx Head and Tail descriptor pointers */

	IXGB_WRITE_REG(hw, TDH, 0);
	IXGB_WRITE_REG(hw, TDT, 0);

	/* don't set up txdctl, it induces performance problems if configured
         * incorrectly */
	/* Set the Tx Interrupt Delay register */

	IXGB_WRITE_REG(hw, TIDV, adapter->tx_int_delay);

	/* Program the Transmit Control Register */

	tctl = IXGB_TCTL_TCE | IXGB_TCTL_TXEN | IXGB_TCTL_TPDE;
	IXGB_WRITE_REG(hw, TCTL, tctl);

	/* Setup Transmit Descriptor Settings for this adapter */
	adapter->tx_cmd_type =
		IXGB_TX_DESC_TYPE |
		(adapter->tx_int_delay_enable ? IXGB_TX_DESC_CMD_IDE : 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
134
88.74%
1
20.00%
Jeff Garzik
12
7.95%
1
20.00%
Joe Perches
3
1.99%
1
20.00%
Jesse Brandeburg
1
0.66%
1
20.00%
Mallikarjuna R Chilakala
1
0.66%
1
20.00%
Total
151
100.00%
5
100.00%

/**
 * ixgb_setup_rx_resources - allocate Rx resources (Descriptors)
 * @adapter: board private structure
 *
 * Returns 0 on success, negative on failure
 **/


int

ixgb_setup_rx_resources(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
	struct pci_dev *pdev = adapter->pdev;
	int size;

	size = sizeof(struct ixgb_buffer) * rxdr->count;
	rxdr->buffer_info = vzalloc(size);
	if (!rxdr->buffer_info)
		return -ENOMEM;

	/* Round up to nearest 4K */

	rxdr->size = rxdr->count * sizeof(struct ixgb_rx_desc);
	rxdr->size = ALIGN(rxdr->size, 4096);

	rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma,
					GFP_KERNEL);

	if (!rxdr->desc) {
		vfree(rxdr->buffer_info);
		return -ENOMEM;
	}
	memset(rxdr->desc, 0, rxdr->size);

	rxdr->next_to_clean = 0;
	rxdr->next_to_use = 0;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
143
87.73%
3
42.86%
Jeff Garzik
8
4.91%
1
14.29%
Nicholas Nunley
6
3.68%
1
14.29%
Milind Arun Choudhary
5
3.07%
1
14.29%
Eric Dumazet
1
0.61%
1
14.29%
Total
163
100.00%
7
100.00%

/**
 * ixgb_setup_rctl - configure the receive control register
 * @adapter: Board private structure
 **/


static void

ixgb_setup_rctl(struct ixgb_adapter *adapter)
{
	u32 rctl;

	rctl = IXGB_READ_REG(&adapter->hw, RCTL);

	rctl &= ~(3 << IXGB_RCTL_MO_SHIFT);

	rctl |=
		IXGB_RCTL_BAM | IXGB_RCTL_RDMTS_1_2 |
		IXGB_RCTL_RXEN | IXGB_RCTL_CFF |
		(adapter->hw.mc_filter_type << IXGB_RCTL_MO_SHIFT);

	rctl |= IXGB_RCTL_SECRC;

	if (adapter->rx_buffer_len <= IXGB_RXBUFFER_2048)
		rctl |= IXGB_RCTL_BSIZE_2048;
	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_4096)
		rctl |= IXGB_RCTL_BSIZE_4096;
	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_8192)
		rctl |= IXGB_RCTL_BSIZE_8192;
	else if (adapter->rx_buffer_len <= IXGB_RXBUFFER_16384)
		rctl |= IXGB_RCTL_BSIZE_16384;

	IXGB_WRITE_REG(&adapter->hw, RCTL, rctl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
94
77.05%
1
33.33%
Auke-Jan H Kok
27
22.13%
1
33.33%
Joe Perches
1
0.82%
1
33.33%
Total
122
100.00%
3
100.00%

/**
 * ixgb_configure_rx - Configure 82597 Receive Unit after Reset.
 * @adapter: board private structure
 *
 * Configure the Rx unit of the MAC after a reset.
 **/


static void

ixgb_configure_rx(struct ixgb_adapter *adapter)
{
	u64 rdba = adapter->rx_ring.dma;
	u32 rdlen = adapter->rx_ring.count * sizeof(struct ixgb_rx_desc);
	struct ixgb_hw *hw = &adapter->hw;
	u32 rctl;
	u32 rxcsum;

	/* make sure receives are disabled while setting up the descriptors */

	rctl = IXGB_READ_REG(hw, RCTL);
	IXGB_WRITE_REG(hw, RCTL, rctl & ~IXGB_RCTL_RXEN);

	/* set the Receive Delay Timer Register */

	IXGB_WRITE_REG(hw, RDTR, adapter->rx_int_delay);

	/* Setup the Base and Length of the Rx Descriptor Ring */

	IXGB_WRITE_REG(hw, RDBAL, (rdba & 0x00000000ffffffffULL));
	IXGB_WRITE_REG(hw, RDBAH, (rdba >> 32));

	IXGB_WRITE_REG(hw, RDLEN, rdlen);

	/* Setup the HW Rx Head and Tail Descriptor Pointers */
	IXGB_WRITE_REG(hw, RDH, 0);
	IXGB_WRITE_REG(hw, RDT, 0);

	/* due to the hardware errata with RXDCTL, we are unable to use any of
         * the performance enhancing features of it without causing other
         * subtle bugs, some of the bugs could include receive length
         * corruption at high data rates (WTHRESH > 0) and/or receive
         * descriptor ring irregularites (particularly in hardware cache) */
	IXGB_WRITE_REG(hw, RXDCTL, 0);

	/* Enable Receive Checksum Offload for TCP and UDP */
	if (adapter->rx_csum) {
		rxcsum = IXGB_READ_REG(hw, RXCSUM);
		rxcsum |= IXGB_RXCSUM_TUOFL;
		IXGB_WRITE_REG(hw, RXCSUM, rxcsum);
	}

	/* Enable Receives */

	IXGB_WRITE_REG(hw, RCTL, rctl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
185
96.86%
1
33.33%
Joe Perches
4
2.09%
1
33.33%
Jesse Brandeburg
2
1.05%
1
33.33%
Total
191
100.00%
3
100.00%

/**
 * ixgb_free_tx_resources - Free Tx Resources
 * @adapter: board private structure
 *
 * Free all transmit software resources
 **/


void

ixgb_free_tx_resources(struct ixgb_adapter *adapter)
{
	struct pci_dev *pdev = adapter->pdev;

	ixgb_clean_tx_ring(adapter);

	vfree(adapter->tx_ring.buffer_info);
	adapter->tx_ring.buffer_info = NULL;

	dma_free_coherent(&pdev->dev, adapter->tx_ring.size,
			  adapter->tx_ring.desc, adapter->tx_ring.dma);

	adapter->tx_ring.desc = NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
71
94.67%
2
66.67%
Nicholas Nunley
4
5.33%
1
33.33%
Total
75
100.00%
3
100.00%


static void

ixgb_unmap_and_free_tx_resource(struct ixgb_adapter *adapter,
                                struct ixgb_buffer *buffer_info)
{
	if (buffer_info->dma) {
		if (buffer_info->mapped_as_page)
			dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
				       buffer_info->length, DMA_TO_DEVICE);
		else
			dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
					 buffer_info->length, DMA_TO_DEVICE);
		buffer_info->dma = 0;
	}

	if (buffer_info->skb) {
		dev_kfree_skb_any(buffer_info->skb);
		buffer_info->skb = NULL;
	}
	buffer_info->time_stamp = 0;
	/* these fields must always be initialized in tx
         * buffer_info->length = 0;
         * buffer_info->next_to_watch = 0; */
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Alexander Duyck
45
42.86%
2
40.00%
Ganesh Venkatesan
43
40.95%
1
20.00%
Nicholas Nunley
10
9.52%
1
20.00%
Auke-Jan H Kok
7
6.67%
1
20.00%
Total
105
100.00%
5
100.00%

/**
 * ixgb_clean_tx_ring - Free Tx Buffers
 * @adapter: board private structure
 **/


static void

ixgb_clean_tx_ring(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
	struct ixgb_buffer *buffer_info;
	unsigned long size;
	unsigned int i;

	/* Free all the Tx ring sk_buffs */

	for (i = 0; i < tx_ring->count; i++) {
		buffer_info = &tx_ring->buffer_info[i];
		ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
	}

	size = sizeof(struct ixgb_buffer) * tx_ring->count;
	memset(tx_ring->buffer_info, 0, size);

	/* Zero out the descriptor ring */

	memset(tx_ring->desc, 0, tx_ring->size);

	tx_ring->next_to_use = 0;
	tx_ring->next_to_clean = 0;

	IXGB_WRITE_REG(&adapter->hw, TDH, 0);
	IXGB_WRITE_REG(&adapter->hw, TDT, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
115
80.99%
2
66.67%
Jeff Garzik
27
19.01%
1
33.33%
Total
142
100.00%
3
100.00%

/**
 * ixgb_free_rx_resources - Free Rx Resources
 * @adapter: board private structure
 *
 * Free all receive software resources
 **/


void

ixgb_free_rx_resources(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
	struct pci_dev *pdev = adapter->pdev;

	ixgb_clean_rx_ring(adapter);

	vfree(rx_ring->buffer_info);
	rx_ring->buffer_info = NULL;

	dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
			  rx_ring->dma);

	rx_ring->desc = NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
53
72.60%
2
50.00%
Jeff Garzik
16
21.92%
1
25.00%
Nicholas Nunley
4
5.48%
1
25.00%
Total
73
100.00%
4
100.00%

/**
 * ixgb_clean_rx_ring - Free Rx Buffers
 * @adapter: board private structure
 **/


static void

ixgb_clean_rx_ring(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
	struct ixgb_buffer *buffer_info;
	struct pci_dev *pdev = adapter->pdev;
	unsigned long size;
	unsigned int i;

	/* Free all the Rx ring sk_buffs */

	for (i = 0; i < rx_ring->count; i++) {
		buffer_info = &rx_ring->buffer_info[i];
		if (buffer_info->dma) {
			dma_unmap_single(&pdev->dev,
					 buffer_info->dma,
					 buffer_info->length,
					 DMA_FROM_DEVICE);
			buffer_info->dma = 0;
			buffer_info->length = 0;
		}

		if (buffer_info->skb) {
			dev_kfree_skb(buffer_info->skb);
			buffer_info->skb = NULL;
		}
	}

	size = sizeof(struct ixgb_buffer) * rx_ring->count;
	memset(rx_ring->buffer_info, 0, size);

	/* Zero out the descriptor ring */

	memset(rx_ring->desc, 0, rx_ring->size);

	rx_ring->next_to_clean = 0;
	rx_ring->next_to_use = 0;

	IXGB_WRITE_REG(&adapter->hw, RDH, 0);
	IXGB_WRITE_REG(&adapter->hw, RDT, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
133
65.52%
1
25.00%
Jeff Garzik
44
21.67%
1
25.00%
Jesse Brandeburg
21
10.34%
1
25.00%
Nicholas Nunley
5
2.46%
1
25.00%
Total
203
100.00%
4
100.00%

/**
 * ixgb_set_mac - Change the Ethernet Address of the NIC
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/


static int

ixgb_set_mac(struct net_device *netdev, void *p)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	struct sockaddr *addr = p;

	if (!is_valid_ether_addr(addr->sa_data))
		return -EADDRNOTAVAIL;

	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);

	ixgb_rar_set(&adapter->hw, addr->sa_data, 0);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
74
94.87%
1
33.33%
Mallikarjuna R Chilakala
3
3.85%
1
33.33%
Ganesh Venkatesan
1
1.28%
1
33.33%
Total
78
100.00%
3
100.00%

/**
 * ixgb_set_multi - Multicast and Promiscuous mode set
 * @netdev: network interface device structure
 *
 * The set_multi entry point is called whenever the multicast address
 * list or the network interface flags are updated.  This routine is
 * responsible for configuring the hardware for proper multicast,
 * promiscuous mode, and all-multi behavior.
 **/


static void

ixgb_set_multi(struct net_device *netdev)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	struct ixgb_hw *hw = &adapter->hw;
	struct netdev_hw_addr *ha;
	u32 rctl;

	/* Check for Promiscuous and All Multicast modes */

	rctl = IXGB_READ_REG(hw, RCTL);

	if (netdev->flags & IFF_PROMISC) {
		rctl |= (IXGB_RCTL_UPE | IXGB_RCTL_MPE);
		/* disable VLAN filtering */
		rctl &= ~IXGB_RCTL_CFIEN;
		rctl &= ~IXGB_RCTL_VFE;
	} else {
		if (netdev->flags & IFF_ALLMULTI) {
			rctl |= IXGB_RCTL_MPE;
			rctl &= ~IXGB_RCTL_UPE;
		} else {
			rctl &= ~(IXGB_RCTL_UPE | IXGB_RCTL_MPE);
		}
		/* enable VLAN filtering */
		rctl |= IXGB_RCTL_VFE;
		rctl &= ~IXGB_RCTL_CFIEN;
	}

	if (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES) {
		rctl |= IXGB_RCTL_MPE;
		IXGB_WRITE_REG(hw, RCTL, rctl);
	} else {
		u8 *mta = kmalloc(IXGB_MAX_NUM_MULTICAST_ADDRESSES *
			      ETH_ALEN, GFP_ATOMIC);
		u8 *addr;
		if (!mta)
			goto alloc_failed;

		IXGB_WRITE_REG(hw, RCTL, rctl);

		addr = mta;
		netdev_for_each_mc_addr(ha, netdev) {
			memcpy(addr, ha->addr, ETH_ALEN);
			addr += ETH_ALEN;
		}

		ixgb_mc_addr_list_update(hw, mta, netdev_mc_count(netdev), 0);
		kfree(mta);
	}

alloc_failed:
	if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
		ixgb_vlan_strip_enable(adapter);
	else
		ixgb_vlan_strip_disable(adapter);

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
141
56.40%
1
8.33%
Jesse Brandeburg
37
14.80%
1
8.33%
Emil Tantilov
30
12.00%
1
8.33%
Jiri Pirko
17
6.80%
3
25.00%
Patrick McHardy
15
6.00%
2
16.67%
Jeff Garzik
4
1.60%
1
8.33%
Mallikarjuna R Chilakala
3
1.20%
1
8.33%
Joe Perches
2
0.80%
1
8.33%
Stephen Hemminger
1
0.40%
1
8.33%
Total
250
100.00%
12
100.00%

/**
 * ixgb_watchdog - Timer Call-back
 * @data: pointer to netdev cast into an unsigned long
 **/


static void

ixgb_watchdog(unsigned long data)
{
	struct ixgb_adapter *adapter = (struct ixgb_adapter *)data;
	struct net_device *netdev = adapter->netdev;
	struct ixgb_desc_ring *txdr = &adapter->tx_ring;

	ixgb_check_for_link(&adapter->hw);

	if (ixgb_check_for_bad_link(&adapter->hw)) {
		/* force the reset path */
		netif_stop_queue(netdev);
	}

	if (adapter->hw.link_up) {
		if (!netif_carrier_ok(netdev)) {
			netdev_info(netdev,
				    "NIC Link is Up 10 Gbps Full Duplex, Flow Control: %s\n",
				    (adapter->hw.fc.type == ixgb_fc_full) ?
				    "RX/TX" :
				    (adapter->hw.fc.type == ixgb_fc_rx_pause) ?
				     "RX" :
				    (adapter->hw.fc.type == ixgb_fc_tx_pause) ?
				    "TX" : "None");
			adapter->link_speed = 10000;
			adapter->link_duplex = FULL_DUPLEX;
			netif_carrier_on(netdev);
		}
	} else {
		if (netif_carrier_ok(netdev)) {
			adapter->link_speed = 0;
			adapter->link_duplex = 0;
			netdev_info(netdev, "NIC Link is Down\n");
			netif_carrier_off(netdev);
		}
	}

	ixgb_update_stats(adapter);

	if (!netif_carrier_ok(netdev)) {
		if (IXGB_DESC_UNUSED(txdr) + 1 < txdr->count) {
			/* We've lost link, so the controller stops DMA,
                         * 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);
			/* return immediately since reset is imminent */
			return;
		}
	}

	/* Force detection of hung controller every watchdog period */
	adapter->detect_tx_hung = true;

	/* generate an interrupt to force clean up of any stragglers */
	IXGB_WRITE_REG(&adapter->hw, ICS, IXGB_INT_TXDW);

	/* Reset the timer */
	mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
167
62.55%
1
14.29%
Jeff Kirsher
45
16.85%
1
14.29%
Jeff Garzik
43
16.10%
1
14.29%
Joe Perches
7
2.62%
2
28.57%
Mallikarjuna R Chilakala
3
1.12%
1
14.29%
Jesse Brandeburg
2
0.75%
1
14.29%
Total
267
100.00%
7
100.00%


#define IXGB_TX_FLAGS_CSUM		0x00000001

#define IXGB_TX_FLAGS_VLAN		0x00000002

#define IXGB_TX_FLAGS_TSO		0x00000004


static int

ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
{
	struct ixgb_context_desc *context_desc;
	unsigned int i;
	u8 ipcss, ipcso, tucss, tucso, hdr_len;
	u16 ipcse, tucse, mss;

	if (likely(skb_is_gso(skb))) {
		struct ixgb_buffer *buffer_info;
		struct iphdr *iph;
		int err;

		err = skb_cow_head(skb, 0);
		if (err < 0)
			return err;

		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
		mss = skb_shinfo(skb)->gso_size;
		iph = ip_hdr(skb);
		iph->tot_len = 0;
		iph->check = 0;
		tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
							 iph->daddr, 0,
							 IPPROTO_TCP, 0);
		ipcss = skb_network_offset(skb);
		ipcso = (void *)&(iph->check) - (void *)skb->data;
		ipcse = skb_transport_offset(skb) - 1;
		tucss = skb_transport_offset(skb);
		tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
		tucse = 0;

		i = adapter->tx_ring.next_to_use;
		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
		buffer_info = &adapter->tx_ring.buffer_info[i];
		WARN_ON(buffer_info->dma != 0);

		context_desc->ipcss = ipcss;
		context_desc->ipcso = ipcso;
		context_desc->ipcse = cpu_to_le16(ipcse);
		context_desc->tucss = tucss;
		context_desc->tucso = tucso;
		context_desc->tucse = cpu_to_le16(tucse);
		context_desc->mss = cpu_to_le16(mss);
		context_desc->hdr_len = hdr_len;
		context_desc->status = 0;
		context_desc->cmd_type_len = cpu_to_le32(
						  IXGB_CONTEXT_DESC_TYPE
						| IXGB_CONTEXT_DESC_CMD_TSE
						| IXGB_CONTEXT_DESC_CMD_IP
						| IXGB_CONTEXT_DESC_CMD_TCP
						| IXGB_CONTEXT_DESC_CMD_IDE
						| (skb->len - (hdr_len)));


		if (++i == adapter->tx_ring.count) i = 0;
		adapter->tx_ring.next_to_use = i;

		return 1;
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
287
75.13%
1
7.69%
Arnaldo Carvalho de Melo
32
8.38%
5
38.46%
Jesse Brandeburg
26
6.81%
1
7.69%
Herbert Xu
20
5.24%
3
23.08%
Jeff Garzik
9
2.36%
1
7.69%
François Romieu
6
1.57%
1
7.69%
Joe Perches
2
0.52%
1
7.69%
Total
382
100.00%
13
100.00%


static bool

ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
{
	struct ixgb_context_desc *context_desc;
	unsigned int i;
	u8 css, cso;

	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
		struct ixgb_buffer *buffer_info;
		css = skb_checksum_start_offset(skb);
		cso = css + skb->csum_offset;

		i = adapter->tx_ring.next_to_use;
		context_desc = IXGB_CONTEXT_DESC(adapter->tx_ring, i);
		buffer_info = &adapter->tx_ring.buffer_info[i];
		WARN_ON(buffer_info->dma != 0);

		context_desc->tucss = css;
		context_desc->tucso = cso;
		context_desc->tucse = 0;
		/* zero out any previously existing data in one instruction */
		*(u32 *)&(context_desc->ipcss) = 0;
		context_desc->status = 0;
		context_desc->hdr_len = 0;
		context_desc->mss = 0;
		context_desc->cmd_type_len =
			cpu_to_le32(IXGB_CONTEXT_DESC_TYPE
				    | IXGB_TX_DESC_CMD_IDE);

		if (++i == adapter->tx_ring.count) i = 0;
		adapter->tx_ring.next_to_use = i;

		return true;
	}

	return false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
148
76.29%
1
11.11%
Jesse Brandeburg
26
13.40%
1
11.11%
Jeff Garzik
9
4.64%
1
11.11%
Joe Perches
5
2.58%
2
22.22%
Arnaldo Carvalho de Melo
2
1.03%
1
11.11%
Al Viro
2
1.03%
1
11.11%
Michał Mirosław
1
0.52%
1
11.11%
Patrick McHardy
1
0.52%
1
11.11%
Total
194
100.00%
9
100.00%


#define IXGB_MAX_TXD_PWR	14

#define IXGB_MAX_DATA_PER_TXD	(1<<IXGB_MAX_TXD_PWR)


static int

ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
	    unsigned int first)
{
	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
	struct pci_dev *pdev = adapter->pdev;
	struct ixgb_buffer *buffer_info;
	int len = skb_headlen(skb);
	unsigned int offset = 0, size, count = 0, i;
	unsigned int mss = skb_shinfo(skb)->gso_size;
	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
	unsigned int f;

	i = tx_ring->next_to_use;

	while (len) {
		buffer_info = &tx_ring->buffer_info[i];
		size = min(len, IXGB_MAX_DATA_PER_TXD);
		/* Workaround for premature desc write-backs
                 * in TSO mode.  Append 4-byte sentinel desc */
		if (unlikely(mss && !nr_frags && size == len && size > 8))
			size -= 4;

		buffer_info->length = size;
		WARN_ON(buffer_info->dma != 0);
		buffer_info->time_stamp = jiffies;
		buffer_info->mapped_as_page = false;
		buffer_info->dma = dma_map_single(&pdev->dev,
						  skb->data + offset,
						  size, DMA_TO_DEVICE);
		if (dma_mapping_error(&pdev->dev, buffer_info->dma))
			goto dma_error;
		buffer_info->next_to_watch = 0;

		len -= size;
		offset += size;
		count++;
		if (len) {
			i++;
			if (i == tx_ring->count)
				i = 0;
		}
	}

	for (f = 0; f < nr_frags; f++) {
		const struct skb_frag_struct *frag;

		frag = &skb_shinfo(skb)->frags[f];
		len = skb_frag_size(frag);
		offset = 0;

		while (len) {
			i++;
			if (i == tx_ring->count)
				i = 0;

			buffer_info = &tx_ring->buffer_info[i];
			size = min(len, IXGB_MAX_DATA_PER_TXD);

			/* Workaround for premature desc write-backs
                         * in TSO mode.  Append 4-byte sentinel desc */
			if (unlikely(mss && (f == (nr_frags - 1))
				     && size == len && size > 8))
				size -= 4;

			buffer_info->length = size;
			buffer_info->time_stamp = jiffies;
			buffer_info->mapped_as_page = true;
			buffer_info->dma =
				skb_frag_dma_map(&pdev->dev, frag, offset, size,
						 DMA_TO_DEVICE);
			if (dma_mapping_error(&pdev->dev, buffer_info->dma))
				goto dma_error;
			buffer_info->next_to_watch = 0;

			len -= size;
			offset += size;
			count++;
		}
	}
	tx_ring->buffer_info[i].skb = skb;
	tx_ring->buffer_info[first].next_to_watch = i;

	return count;

dma_error:
	dev_err(&pdev->dev, "TX DMA map failed\n");
	buffer_info->dma = 0;
	if (count)
		count--;

	while (count--) {
		if (i==0)
			i += tx_ring->count;
		i--;
		buffer_info = &tx_ring->buffer_info[i];
		ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
	}

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
182
34.40%
1
7.14%
Alexander Duyck
141
26.65%
2
14.29%
Jeff Garzik
79
14.93%
1
7.14%
Jesse Brandeburg
77
14.56%
3
21.43%
Auke-Jan H Kok
18
3.40%
3
21.43%
Nicholas Nunley
17
3.21%
1
7.14%
Roel Kluin
9
1.70%
1
7.14%
Eric Dumazet
4
0.76%
1
7.14%
Ian Campbell
2
0.38%
1
7.14%
Total
529
100.00%
14
100.00%


static void

ixgb_tx_queue(struct ixgb_adapter *adapter, int count, int vlan_id,int tx_flags)
{
	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
	struct ixgb_tx_desc *tx_desc = NULL;
	struct ixgb_buffer *buffer_info;
	u32 cmd_type_len = adapter->tx_cmd_type;
	u8 status = 0;
	u8 popts = 0;
	unsigned int i;

	if (tx_flags & IXGB_TX_FLAGS_TSO) {
		cmd_type_len |= IXGB_TX_DESC_CMD_TSE;
		popts |= (IXGB_TX_DESC_POPTS_IXSM | IXGB_TX_DESC_POPTS_TXSM);
	}

	if (tx_flags & IXGB_TX_FLAGS_CSUM)
		popts |= IXGB_TX_DESC_POPTS_TXSM;

	if (tx_flags & IXGB_TX_FLAGS_VLAN)
		cmd_type_len |= IXGB_TX_DESC_CMD_VLE;

	i = tx_ring->next_to_use;

	while (count--) {
		buffer_info = &tx_ring->buffer_info[i];
		tx_desc = IXGB_TX_DESC(*tx_ring, i);
		tx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
		tx_desc->cmd_type_len =
			cpu_to_le32(cmd_type_len | buffer_info->length);
		tx_desc->status = status;
		tx_desc->popts = popts;
		tx_desc->vlan = cpu_to_le16(vlan_id);

		if (++i == tx_ring->count) i = 0;
	}

	tx_desc->cmd_type_len |=
		cpu_to_le32(IXGB_TX_DESC_CMD_EOP | IXGB_TX_DESC_CMD_RS);

	/* Force memory writes to complete before letting h/w
         * know there are new descriptors to fetch.  (Only
         * applicable for weak-ordered memory model archs,
         * such as IA-64). */
	wmb();

	tx_ring->next_to_use = i;
	IXGB_WRITE_REG(&adapter->hw, TDT, i);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
196
86.34%
1
33.33%
Jeff Garzik
28
12.33%
1
33.33%
Joe Perches
3
1.32%
1
33.33%
Total
227
100.00%
3
100.00%



static int __ixgb_maybe_stop_tx(struct net_device *netdev, int size)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;

	netif_stop_queue(netdev);
	/* Herbert's original patch had:
         *  smp_mb__after_netif_stop_queue();
         * but since that doesn't exist yet, just open code it. */
	smp_mb();

	/* We need to check again in a case another CPU has just
         * made room available. */
	if (likely(IXGB_DESC_UNUSED(tx_ring) < size))
		return -EBUSY;

	/* A reprieve! */
	netif_start_queue(netdev);
	++adapter->restart_queue;
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Brandeburg
74
100.00%
1
100.00%
Total
74
100.00%
1
100.00%



static int ixgb_maybe_stop_tx(struct net_device *netdev,
                              struct ixgb_desc_ring *tx_ring, int size)
{
	if (likely(IXGB_DESC_UNUSED(tx_ring) >= size))
		return 0;
	return __ixgb_maybe_stop_tx(netdev, size);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Brandeburg
42
100.00%
1
100.00%
Total
42
100.00%
1
100.00%

/* Tx Descriptors needed, worst case */

#define TXD_USE_COUNT(S) (((S) >> IXGB_MAX_TXD_PWR) + \
                         (((S) & (IXGB_MAX_DATA_PER_TXD - 1)) ? 1 : 0))

#define DESC_NEEDED TXD_USE_COUNT(IXGB_MAX_DATA_PER_TXD) /* skb->date */ + \
        MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1 /* for context */ \
        + 1 /* one more needed for sentinel TSO workaround */


static netdev_tx_t

ixgb_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	unsigned int first;
	unsigned int tx_flags = 0;
	int vlan_id = 0;
	int count = 0;
	int tso;

	if (test_bit(__IXGB_DOWN, &adapter->flags)) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (skb->len <= 0) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (unlikely(ixgb_maybe_stop_tx(netdev, &adapter->tx_ring,
                     DESC_NEEDED)))
		return NETDEV_TX_BUSY;

	if (skb_vlan_tag_present(skb)) {
		tx_flags |= IXGB_TX_FLAGS_VLAN;
		vlan_id = skb_vlan_tag_get(skb);
	}

	first = adapter->tx_ring.next_to_use;

	tso = ixgb_tso(adapter, skb);
	if (tso < 0) {
		dev_kfree_skb_any(skb);
		return NETDEV_TX_OK;
	}

	if (likely(tso))
		tx_flags |= IXGB_TX_FLAGS_TSO;
	else if (ixgb_tx_csum(adapter, skb))
		tx_flags |= IXGB_TX_FLAGS_CSUM;

	count = ixgb_tx_map(adapter, skb, first);

	if (count) {
		ixgb_tx_queue(adapter, count, vlan_id, tx_flags);
		/* Make sure there is space in the ring for the next send. */
		ixgb_maybe_stop_tx(netdev, &adapter->tx_ring, DESC_NEEDED);

	} else {
		dev_kfree_skb_any(skb);
		adapter->tx_ring.buffer_info[first].time_stamp = 0;
		adapter->tx_ring.next_to_use = first;
	}

	return NETDEV_TX_OK;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
110
42.31%
1
7.69%
Alexander Duyck
48
18.46%
1
7.69%
Jesse Brandeburg
30
11.54%
2
15.38%
Jeff Garzik
24
9.23%
1
7.69%
Herbert Xu
24
9.23%
1
7.69%
Auke-Jan H Kok
14
5.38%
2
15.38%
Mallikarjuna R Chilakala
3
1.15%
1
7.69%
Eric W. Biedermann
3
1.15%
1
7.69%
Jiri Pirko
2
0.77%
1
7.69%
Stephen Hemminger
1
0.38%
1
7.69%
Patrick McHardy
1
0.38%
1
7.69%
Total
260
100.00%
13
100.00%

/**
 * ixgb_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 **/


static void

ixgb_tx_timeout(struct net_device *netdev)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	/* Do the reset outside of interrupt context */
	schedule_work(&adapter->tx_timeout_task);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
27
90.00%
1
50.00%
Mallikarjuna R Chilakala
3
10.00%
1
50.00%
Total
30
100.00%
2
100.00%


static void

ixgb_tx_timeout_task(struct work_struct *work)
{
	struct ixgb_adapter *adapter =
		container_of(work, struct ixgb_adapter, tx_timeout_task);

	adapter->tx_timeout_count++;
	ixgb_down(adapter, true);
	ixgb_up(adapter);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
26
60.47%
1
20.00%
David Howells
9
20.93%
1
20.00%
Auke-Jan H Kok
5
11.63%
1
20.00%
Mallikarjuna R Chilakala
2
4.65%
1
20.00%
Joe Perches
1
2.33%
1
20.00%
Total
43
100.00%
5
100.00%

/**
 * ixgb_get_stats - Get System Network Statistics
 * @netdev: network interface device structure
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the timer callback.
 **/


static struct net_device_stats *

ixgb_get_stats(struct net_device *netdev)
{
	return &netdev->stats;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
17
89.47%
1
50.00%
Ajit Khaparde
2
10.53%
1
50.00%
Total
19
100.00%
2
100.00%

/**
 * ixgb_change_mtu - Change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/


static int

ixgb_change_mtu(struct net_device *netdev, int new_mtu)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	int max_frame = new_mtu + ENET_HEADER_SIZE + ENET_FCS_LENGTH;

	if (netif_running(netdev))
		ixgb_down(adapter, true);

	adapter->rx_buffer_len = max_frame + 8; /* + 8 for errata */

	netdev->mtu = new_mtu;

	if (netif_running(netdev))
		ixgb_up(adapter);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
51
66.23%
1
20.00%
Jesse Brandeburg
17
22.08%
2
40.00%
Jeff Garzik
6
7.79%
1
20.00%
Mallikarjuna R Chilakala
3
3.90%
1
20.00%
Total
77
100.00%
5
100.00%

/**
 * ixgb_update_stats - Update the board statistics counters.
 * @adapter: board private structure
 **/


void

ixgb_update_stats(struct ixgb_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;

	/* Prevent stats update while adapter is being reset */
	if (pci_channel_offline(pdev))
		return;

	if ((netdev->flags & IFF_PROMISC) || (netdev->flags & IFF_ALLMULTI) ||
	   (netdev_mc_count(netdev) > IXGB_MAX_NUM_MULTICAST_ADDRESSES)) {
		u64 multi = IXGB_READ_REG(&adapter->hw, MPRCL);
		u32 bcast_l = IXGB_READ_REG(&adapter->hw, BPRCL);
		u32 bcast_h = IXGB_READ_REG(&adapter->hw, BPRCH);
		u64 bcast = ((u64)bcast_h << 32) | bcast_l;

		multi |= ((u64)IXGB_READ_REG(&adapter->hw, MPRCH) << 32);
		/* fix up multicast stats by removing broadcasts */
		if (multi >= bcast)
			multi -= bcast;

		adapter->stats.mprcl += (multi & 0xFFFFFFFF);
		adapter->stats.mprch += (multi >> 32);
		adapter->stats.bprcl += bcast_l;
		adapter->stats.bprch += bcast_h;
	} else {
		adapter->stats.mprcl += IXGB_READ_REG(&adapter->hw, MPRCL);
		adapter->stats.mprch += IXGB_READ_REG(&adapter->hw, MPRCH);
		adapter->stats.bprcl += IXGB_READ_REG(&adapter->hw, BPRCL);
		adapter->stats.bprch += IXGB_READ_REG(&adapter->hw, BPRCH);
	}
	adapter->stats.tprl += IXGB_READ_REG(&adapter->hw, TPRL);
	adapter->stats.tprh += IXGB_READ_REG(&adapter->hw, TPRH);
	adapter->stats.gprcl += IXGB_READ_REG(&adapter->hw, GPRCL);
	adapter->stats.gprch += IXGB_READ_REG(&adapter->hw, GPRCH);
	adapter->stats.uprcl += IXGB_READ_REG(&adapter->hw, UPRCL);
	adapter->stats.uprch += IXGB_READ_REG(&adapter->hw, UPRCH);
	adapter->stats.vprcl += IXGB_READ_REG(&adapter->hw, VPRCL);
	adapter->stats.vprch += IXGB_READ_REG(&adapter->hw, VPRCH);
	adapter->stats.jprcl += IXGB_READ_REG(&adapter->hw, JPRCL);
	adapter->stats.jprch += IXGB_READ_REG(&adapter->hw, JPRCH);
	adapter->stats.gorcl += IXGB_READ_REG(&adapter->hw, GORCL);
	adapter->stats.gorch += IXGB_READ_REG(&adapter->hw, GORCH);
	adapter->stats.torl += IXGB_READ_REG(&adapter->hw, TORL);
	adapter->stats.torh += IXGB_READ_REG(&adapter->hw, TORH);
	adapter->stats.rnbc += IXGB_READ_REG(&adapter->hw, RNBC);
	adapter->stats.ruc += IXGB_READ_REG(&adapter->hw, RUC);
	adapter->stats.roc += IXGB_READ_REG(&adapter->hw, ROC);
	adapter->stats.rlec += IXGB_READ_REG(&adapter->hw, RLEC);
	adapter->stats.crcerrs += IXGB_READ_REG(&adapter->hw, CRCERRS);
	adapter->stats.icbc += IXGB_READ_REG(&adapter->hw, ICBC);
	adapter->stats.ecbc += IXGB_READ_REG(&adapter->hw, ECBC);
	adapter->stats.mpc += IXGB_READ_REG(&adapter->hw, MPC);
	adapter->stats.tptl += IXGB_READ_REG(&adapter->hw, TPTL);
	adapter->stats.tpth += IXGB_READ_REG(&adapter->hw, TPTH);
	adapter->stats.gptcl += IXGB_READ_REG(&adapter->hw, GPTCL);
	adapter->stats.gptch += IXGB_READ_REG(&adapter->hw, GPTCH);
	adapter->stats.bptcl += IXGB_READ_REG(&adapter->hw, BPTCL);
	adapter->stats.bptch += IXGB_READ_REG(&adapter->hw, BPTCH);
	adapter->stats.mptcl += IXGB_READ_REG(&adapter->hw, MPTCL);
	adapter->stats.mptch += IXGB_READ_REG(&adapter->hw, MPTCH);
	adapter->stats.uptcl += IXGB_READ_REG(&adapter->hw, UPTCL);
	adapter->stats.uptch += IXGB_READ_REG(&adapter->hw, UPTCH);
	adapter->stats.vptcl += IXGB_READ_REG(&adapter->hw, VPTCL);
	adapter->stats.vptch += IXGB_READ_REG(&adapter->hw, VPTCH);
	adapter->stats.jptcl += IXGB_READ_REG(&adapter->hw, JPTCL);
	adapter->stats.jptch += IXGB_READ_REG(&adapter->hw, JPTCH);
	adapter->stats.gotcl += IXGB_READ_REG(&adapter->hw, GOTCL);
	adapter->stats.gotch += IXGB_READ_REG(&adapter->hw, GOTCH);
	adapter->stats.totl += IXGB_READ_REG(&adapter->hw, TOTL);
	adapter->stats.toth += IXGB_READ_REG(&adapter->hw, TOTH);
	adapter->stats.dc += IXGB_READ_REG(&adapter->hw, DC);
	adapter->stats.plt64c += IXGB_READ_REG(&adapter->hw, PLT64C);
	adapter->stats.tsctc += IXGB_READ_REG(&adapter->hw, TSCTC);
	adapter->stats.tsctfc += IXGB_READ_REG(&adapter->hw, TSCTFC);
	adapter->stats.ibic += IXGB_READ_REG(&adapter->hw, IBIC);
	adapter->stats.rfc += IXGB_READ_REG(&adapter->hw, RFC);
	adapter->stats.lfc += IXGB_READ_REG(&adapter->hw, LFC);
	adapter->stats.pfrc += IXGB_READ_REG(&adapter->hw, PFRC);
	adapter->stats.pftc += IXGB_READ_REG(&adapter->hw, PFTC);
	adapter->stats.mcfrc += IXGB_READ_REG(&adapter->hw, MCFRC);
	adapter->stats.mcftc += IXGB_READ_REG(&adapter->hw, MCFTC);
	adapter->stats.xonrxc += IXGB_READ_REG(&adapter->hw, XONRXC);
	adapter->stats.xontxc += IXGB_READ_REG(&adapter->hw, XONTXC);
	adapter->stats.xoffrxc += IXGB_READ_REG(&adapter->hw, XOFFRXC);
	adapter->stats.xofftxc += IXGB_READ_REG(&adapter->hw, XOFFTXC);
	adapter->stats.rjc += IXGB_READ_REG(&adapter->hw, RJC);

	/* Fill out the OS statistics structure */

	netdev->stats.rx_packets = adapter->stats.gprcl;
	netdev->stats.tx_packets = adapter->stats.gptcl;
	netdev->stats.rx_bytes = adapter->stats.gorcl;
	netdev->stats.tx_bytes = adapter->stats.gotcl;
	netdev->stats.multicast = adapter->stats.mprcl;
	netdev->stats.collisions = 0;

	/* ignore RLEC as it reports errors for padded (<64bytes) frames
         * with a length in the type/len field */
	netdev->stats.rx_errors =
	    /* adapter->stats.rnbc + */ adapter->stats.crcerrs +
	    adapter->stats.ruc +
	    adapter->stats.roc /*+ adapter->stats.rlec */  +
	    adapter->stats.icbc +
	    adapter->stats.ecbc + adapter->stats.mpc;

	/* see above
         * netdev->stats.rx_length_errors = adapter->stats.rlec;
         */

	netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
	netdev->stats.rx_fifo_errors = adapter->stats.mpc;
	netdev->stats.rx_missed_errors = adapter->stats.mpc;
	netdev->stats.rx_over_errors = adapter->stats.mpc;

	netdev->stats.tx_errors = 0;
	netdev->stats.rx_frame_errors = 0;
	netdev->stats.tx_aborted_errors = 0;
	netdev->stats.tx_carrier_errors = 0;
	netdev->stats.tx_fifo_errors = 0;
	netdev->stats.tx_heartbeat_errors = 0;
	netdev->stats.tx_window_errors = 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
1135
82.79%
1
12.50%
Mallikarjuna R Chilakala
177
12.91%
2
25.00%
Ajit Khaparde
37
2.70%
1
12.50%
Linas Vepstas
18
1.31%
2
25.00%
Jiri Pirko
3
0.22%
1
12.50%
Jeff Garzik
1
0.07%
1
12.50%
Total
1371
100.00%
8
100.00%


#define IXGB_MAX_INTR 10
/**
 * ixgb_intr - Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a network interface device structure
 **/


static irqreturn_t

ixgb_intr(int irq, void *data)
{
	struct net_device *netdev = data;
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	struct ixgb_hw *hw = &adapter->hw;
	u32 icr = IXGB_READ_REG(hw, ICR);

	if (unlikely(!icr))
		return IRQ_NONE;  /* Not our interrupt */

	if (unlikely(icr & (IXGB_INT_RXSEQ | IXGB_INT_LSC)))
		if (!test_bit(__IXGB_DOWN, &adapter->flags))
			mod_timer(&adapter->watchdog_timer, jiffies);

	if (napi_schedule_prep(&adapter->napi)) {

		/* Disable interrupts and register for poll. The flush
                  of the posted write is intentionally left out.
                */

		IXGB_WRITE_REG(&adapter->hw, IMC, ~0);
		__napi_schedule(&adapter->napi);
	}
	return IRQ_HANDLED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
61
45.19%
2
20.00%
Jeff Garzik
26
19.26%
1
10.00%
Andrew Morton
20
14.81%
1
10.00%
Jesse Brandeburg
14
10.37%
2
20.00%
Stephen Hemminger
8
5.93%
1
10.00%
Mallikarjuna R Chilakala
3
2.22%
1
10.00%
Ben Hutchings
2
1.48%
1
10.00%
Joe Perches
1
0.74%
1
10.00%
Total
135
100.00%
10
100.00%

/**
 * ixgb_clean - NAPI Rx polling callback
 * @adapter: board private structure
 **/


static int

ixgb_clean(struct napi_struct *napi, int budget)
{
	struct ixgb_adapter *adapter = container_of(napi, struct ixgb_adapter, napi);
	int work_done = 0;

	ixgb_clean_tx_irq(adapter);
	ixgb_clean_rx_irq(adapter, &work_done, budget);

	/* If budget not fully consumed, exit the polling mode */
	if (work_done < budget) {
		napi_complete_done(napi, work_done);
		if (!test_bit(__IXGB_DOWN, &adapter->flags))
			ixgb_irq_enable(adapter);
	}

	return work_done;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
37
43.02%
1
14.29%
Jeff Garzik
16
18.60%
1
14.29%
Jesse Brandeburg
13
15.12%
1
14.29%
Stephen Hemminger
12
13.95%
1
14.29%
Eric Dumazet
3
3.49%
1
14.29%
David S. Miller
3
3.49%
1
14.29%
Mallikarjuna R Chilakala
2
2.33%
1
14.29%
Total
86
100.00%
7
100.00%

/**
 * ixgb_clean_tx_irq - Reclaim resources after transmit completes
 * @adapter: board private structure
 **/


static bool

ixgb_clean_tx_irq(struct ixgb_adapter *adapter)
{
	struct ixgb_desc_ring *tx_ring = &adapter->tx_ring;
	struct net_device *netdev = adapter->netdev;
	struct ixgb_tx_desc *tx_desc, *eop_desc;
	struct ixgb_buffer *buffer_info;
	unsigned int i, eop;
	bool cleaned = false;

	i = tx_ring->next_to_clean;
	eop = tx_ring->buffer_info[i].next_to_watch;
	eop_desc = IXGB_TX_DESC(*tx_ring, eop);

	while (eop_desc->status & IXGB_TX_DESC_STATUS_DD) {

		rmb(); /* read buffer_info after eop_desc */
		for (cleaned = false; !cleaned; ) {
			tx_desc = IXGB_TX_DESC(*tx_ring, i);
			buffer_info = &tx_ring->buffer_info[i];

			if (tx_desc->popts &
			   (IXGB_TX_DESC_POPTS_TXSM |
			    IXGB_TX_DESC_POPTS_IXSM))
				adapter->hw_csum_tx_good++;

			ixgb_unmap_and_free_tx_resource(adapter, buffer_info);

			*(u32 *)&(tx_desc->status) = 0;

			cleaned = (i == eop);
			if (++i == tx_ring->count) i = 0;
		}

		eop = tx_ring->buffer_info[i].next_to_watch;
		eop_desc = IXGB_TX_DESC(*tx_ring, eop);
	}

	tx_ring->next_to_clean = i;

	if (unlikely(cleaned && netif_carrier_ok(netdev) &&
		     IXGB_DESC_UNUSED(tx_ring) >= DESC_NEEDED)) {
		/* Make sure that anybody stopping the queue after this
                 * sees the new next_to_clean. */
		smp_mb();

		if (netif_queue_stopped(netdev) &&
		    !(test_bit(__IXGB_DOWN, &adapter->flags))) {
			netif_wake_queue(netdev);
			++adapter->restart_queue;
		}
	}

	if (adapter->detect_tx_hung) {
		/* detect a transmit hang in hardware, this serializes the
                 * check with the clearing of time_stamp and movement of i */
		adapter->detect_tx_hung = false;
		if (tx_ring->buffer_info[eop].time_stamp &&
		   time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + HZ)
		   && !(IXGB_READ_REG(&adapter->hw, STATUS) &
		        IXGB_STATUS_TXOFF)) {
			/* detected Tx unit hang */
			netif_err(adapter, drv, adapter->netdev,
				  "Detected Tx Unit Hang\n"
				  "  TDH                  <%x>\n"
				  "  TDT                  <%x>\n"
				  "  next_to_use          <%x>\n"
				  "  next_to_clean        <%x>\n"
				  "buffer_info[next_to_clean]\n"
				  "  time_stamp           <%lx>\n"
				  "  next_to_watch        <%x>\n"
				  "  jiffies              <%lx>\n"
				  "  next_to_watch.status <%x>\n",
				  IXGB_READ_REG(&adapter->hw, TDH),
				  IXGB_READ_REG(&adapter->hw, TDT),
				  tx_ring->next_to_use,
				  tx_ring->next_to_clean,
				  tx_ring->buffer_info[eop].time_stamp,
				  eop,
				  jiffies,
				  eop_desc->status);
			netif_stop_queue(netdev);
		}
	}

	return cleaned;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
127
31.36%
2
16.67%
Jeff Garzik
101
24.94%
1
8.33%
Auke-Jan H Kok
76
18.77%
2
16.67%
Mallikarjuna R Chilakala
58
14.32%
1
8.33%
Jesse Brandeburg
25
6.17%
1
8.33%
Joe Perches
13
3.21%
3
25.00%
Jeff Kirsher
4
0.99%
1
8.33%
Alexander Duyck
1
0.25%
1
8.33%
Total
405
100.00%
12
100.00%

/**
 * ixgb_rx_checksum - Receive Checksum Offload for 82597.
 * @adapter: board private structure
 * @rx_desc: receive descriptor
 * @sk_buff: socket buffer with received data
 **/


static void

ixgb_rx_checksum(struct ixgb_adapter *adapter,
                 struct ixgb_rx_desc *rx_desc,
                 struct sk_buff *skb)
{
	/* Ignore Checksum bit is set OR
         * TCP Checksum has not been calculated
         */
	if ((rx_desc->status & IXGB_RX_DESC_STATUS_IXSM) ||
	   (!(rx_desc->status & IXGB_RX_DESC_STATUS_TCPCS))) {
		skb_checksum_none_assert(skb);
		return;
	}

	/* At this point we know the hardware did the TCP checksum */
	/* now look at the TCP checksum error bit */
	if (rx_desc->errors & IXGB_RX_DESC_ERRORS_TCPE) {
		/* let the stack verify checksum errors */
		skb_checksum_none_assert(skb);
		adapter->hw_csum_rx_error++;
	} else {
		/* TCP checksum is good */
		skb->ip_summed = CHECKSUM_UNNECESSARY;
		adapter->hw_csum_rx_good++;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andrew Morton
83
93.26%
1
50.00%
Eric Dumazet
6
6.74%
1
50.00%
Total
89
100.00%
2
100.00%

/*
 * this should improve performance for small packets with large amounts
 * of reassembly being done in the stack
 */


static void ixgb_check_copybreak(struct napi_struct *napi,
				 struct ixgb_buffer *buffer_info,
				 u32 length, struct sk_buff **skb)
{
	struct sk_buff *new_skb;

	if (length > copybreak)
		return;

	new_skb = napi_alloc_skb(napi, length);
	if (!new_skb)
		return;

	skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN,
				       (*skb)->data - NET_IP_ALIGN,
				       length + NET_IP_ALIGN);
	/* save the skb in buffer_info as good */
	buffer_info->skb = *skb;
	*skb = new_skb;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Joe Perches
82
95.35%
1
50.00%
Alexander Duyck
4
4.65%
1
50.00%
Total
86
100.00%
2
100.00%

/**
 * ixgb_clean_rx_irq - Send received data up the network stack,
 * @adapter: board private structure
 **/


static bool

ixgb_clean_rx_irq(struct ixgb_adapter *adapter, int *work_done, int work_to_do)
{
	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;
	struct ixgb_rx_desc *rx_desc, *next_rxd;
	struct ixgb_buffer *buffer_info, *next_buffer, *next2_buffer;
	u32 length;
	unsigned int i, j;
	int cleaned_count = 0;
	bool cleaned = false;

	i = rx_ring->next_to_clean;
	rx_desc = IXGB_RX_DESC(*rx_ring, i);
	buffer_info = &rx_ring->buffer_info[i];

	while (rx_desc->status & IXGB_RX_DESC_STATUS_DD) {
		struct sk_buff *skb;
		u8 status;

		if (*work_done >= work_to_do)
			break;

		(*work_done)++;
		rmb();	/* read descriptor and rx_buffer_info after status DD */
		status = rx_desc->status;
		skb = buffer_info->skb;
		buffer_info->skb = NULL;

		prefetch(skb->data - NET_IP_ALIGN);

		if (++i == rx_ring->count)
			i = 0;
		next_rxd = IXGB_RX_DESC(*rx_ring, i);
		prefetch(next_rxd);

		j = i + 1;
		if (j == rx_ring->count)
			j = 0;
		next2_buffer = &rx_ring->buffer_info[j];
		prefetch(next2_buffer);

		next_buffer = &rx_ring->buffer_info[i];

		cleaned = true;
		cleaned_count++;

		dma_unmap_single(&pdev->dev,
				 buffer_info->dma,
				 buffer_info->length,
				 DMA_FROM_DEVICE);
		buffer_info->dma = 0;

		length = le16_to_cpu(rx_desc->length);
		rx_desc->length = 0;

		if (unlikely(!(status & IXGB_RX_DESC_STATUS_EOP))) {

			/* All receives must fit into a single buffer */

			pr_debug("Receive packet consumed multiple buffers length<%x>\n",
				 length);

			dev_kfree_skb_irq(skb);
			goto rxdesc_done;
		}

		if (unlikely(rx_desc->errors &
		    (IXGB_RX_DESC_ERRORS_CE | IXGB_RX_DESC_ERRORS_SE |
		     IXGB_RX_DESC_ERRORS_P | IXGB_RX_DESC_ERRORS_RXE))) {
			dev_kfree_skb_irq(skb);
			goto rxdesc_done;
		}

		ixgb_check_copybreak(&adapter->napi, buffer_info, length, &skb);

		/* Good Receive */
		skb_put(skb, length);

		/* Receive Checksum Offload */
		ixgb_rx_checksum(adapter, rx_desc, skb);

		skb->protocol = eth_type_trans(skb, netdev);
		if (status & IXGB_RX_DESC_STATUS_VP)
			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
				       le16_to_cpu(rx_desc->special));

		netif_receive_skb(skb);

rxdesc_done:
		/* clean up descriptor, might be written over by hw */
		rx_desc->status = 0;

		/* return some buffers to hardware, one at a time is too slow */
		if (unlikely(cleaned_count >= IXGB_RX_BUFFER_WRITE)) {
			ixgb_alloc_rx_buffers(adapter, cleaned_count);
			cleaned_count = 0;
		}

		/* use prefetched values */
		rx_desc = next_rxd;
		buffer_info = next_buffer;
	}

	rx_ring->next_to_clean = i;

	cleaned_count = IXGB_DESC_UNUSED(rx_ring);
	if (cleaned_count)
		ixgb_alloc_rx_buffers(adapter, cleaned_count);

	return cleaned;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
199
40.70%
3
15.79%
Jeff Garzik
161
32.92%
1
5.26%
Jesse Brandeburg
58
11.86%
1
5.26%
Mallikarjuna R Chilakala
24
4.91%
1
5.26%
Joe Perches
15
3.07%
4
21.05%
Auke-Jan H Kok
12
2.45%
3
15.79%
Nicholas Nunley
5
1.02%
1
5.26%
Patrick McHardy
5
1.02%
1
5.26%
Jeff Kirsher
4
0.82%
1
5.26%
Alexander Duyck
4
0.82%
1
5.26%
Arnaldo Carvalho de Melo
1
0.20%
1
5.26%
Emil Tantilov
1
0.20%
1
5.26%
Total
489
100.00%
19
100.00%

/**
 * ixgb_alloc_rx_buffers - Replace used receive buffers
 * @adapter: address of board private structure
 **/


static void

ixgb_alloc_rx_buffers(struct ixgb_adapter *adapter, int cleaned_count)
{
	struct ixgb_desc_ring *rx_ring = &adapter->rx_ring;
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;
	struct ixgb_rx_desc *rx_desc;
	struct ixgb_buffer *buffer_info;
	struct sk_buff *skb;
	unsigned int i;
	long cleancount;

	i = rx_ring->next_to_use;
	buffer_info = &rx_ring->buffer_info[i];
	cleancount = IXGB_DESC_UNUSED(rx_ring);


	/* leave three descriptors unused */
	while (--cleancount > 2 && cleaned_count--) {
		/* recycle! its good for you */
		skb = buffer_info->skb;
		if (skb) {
			skb_trim(skb, 0);
			goto map_skb;
		}

		skb = netdev_alloc_skb_ip_align(netdev, adapter->rx_buffer_len);
		if (unlikely(!skb)) {
			/* Better luck next round */
			adapter->alloc_rx_buff_failed++;
			break;
		}

		buffer_info->skb = skb;
		buffer_info->length = adapter->rx_buffer_len;
map_skb:
		buffer_info->dma = dma_map_single(&pdev->dev,
		                                  skb->data,
		                                  adapter->rx_buffer_len,
						  DMA_FROM_DEVICE);
		if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
			adapter->alloc_rx_buff_failed++;
			break;
		}

		rx_desc = IXGB_RX_DESC(*rx_ring, i);
		rx_desc->buff_addr = cpu_to_le64(buffer_info->dma);
		/* guarantee DD bit not set now before h/w gets descriptor
                 * this is the rest of the workaround for h/w double
                 * writeback. */
		rx_desc->status = 0;


		if (++i == rx_ring->count)
			i = 0;
		buffer_info = &rx_ring->buffer_info[i];
	}

	if (likely(rx_ring->next_to_use != i)) {
		rx_ring->next_to_use = i;
		if (unlikely(i-- == 0))
			i = (rx_ring->count - 1);

		/* Force memory writes to complete before letting h/w
                 * know there are new descriptors to fetch.  (Only
                 * applicable for weak-ordered memory model archs, such
                 * as IA-64). */
		wmb();
		IXGB_WRITE_REG(&adapter->hw, RDT, i);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
148
46.69%
1
9.09%
Auke-Jan H Kok
89
28.08%
3
27.27%
Jeff Garzik
37
11.67%
1
9.09%
Christoph Paasch
22
6.94%
1
9.09%
Mallikarjuna R Chilakala
8
2.52%
1
9.09%
Jesse Brandeburg
7
2.21%
2
18.18%
Nicholas Nunley
5
1.58%
1
9.09%
Eric Dumazet
1
0.32%
1
9.09%
Total
317
100.00%
11
100.00%


static void

ixgb_vlan_strip_enable(struct ixgb_adapter *adapter)
{
	u32 ctrl;

	/* enable VLAN tag insert/strip */
	ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
	ctrl |= IXGB_CTRL0_VME;
	IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
31
72.09%
1
50.00%
Emil Tantilov
12
27.91%
1
50.00%
Total
43
100.00%
2
100.00%


static void

ixgb_vlan_strip_disable(struct ixgb_adapter *adapter)
{
	u32 ctrl;

	/* disable VLAN tag insert/strip */
	ctrl = IXGB_READ_REG(&adapter->hw, CTRL0);
	ctrl &= ~IXGB_CTRL0_VME;
	IXGB_WRITE_REG(&adapter->hw, CTRL0, ctrl);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
32
72.73%
1
50.00%
Emil Tantilov
12
27.27%
1
50.00%
Total
44
100.00%
2
100.00%


static int

ixgb_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	u32 vfta, index;

	/* add VID to filter table */

	index = (vid >> 5) & 0x7F;
	vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
	vfta |= (1 << (vid & 0x1F));
	ixgb_write_vfta(&adapter->hw, index, vfta);
	set_bit(vid, adapter->active_vlans);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
72
77.42%
1
16.67%
Emil Tantilov
9
9.68%
1
16.67%
Jiri Pirko
4
4.30%
1
16.67%
Mallikarjuna R Chilakala
3
3.23%
1
16.67%
Patrick McHardy
3
3.23%
1
16.67%
Joe Perches
2
2.15%
1
16.67%
Total
93
100.00%
6
100.00%


static int

ixgb_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
{
	struct ixgb_adapter *adapter = netdev_priv(netdev);
	u32 vfta, index;

	/* remove VID from filter table */

	index = (vid >> 5) & 0x7F;
	vfta = IXGB_READ_REG_ARRAY(&adapter->hw, VFTA, index);
	vfta &= ~(1 << (vid & 0x1F));
	ixgb_write_vfta(&adapter->hw, index, vfta);
	clear_bit(vid, adapter->active_vlans);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
72
76.60%
1
14.29%
Emil Tantilov
9
9.57%
1
14.29%
Jiri Pirko
4
4.26%
1
14.29%
Patrick McHardy
3
3.19%
1
14.29%
Mallikarjuna R Chilakala
3
3.19%
1
14.29%
Joe Perches
2
2.13%
1
14.29%
Jesse Brandeburg
1
1.06%
1
14.29%
Total
94
100.00%
7
100.00%


static void

ixgb_restore_vlan(struct ixgb_adapter *adapter)
{
	u16 vid;

	for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
		ixgb_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
22
61.11%
1
20.00%
Patrick McHardy
5
13.89%
1
20.00%
Emil Tantilov
5
13.89%
1
20.00%
Dan Aloni
3
8.33%
1
20.00%
Joe Perches
1
2.78%
1
20.00%
Total
36
100.00%
5
100.00%

#ifdef CONFIG_NET_POLL_CONTROLLER
/*
 * Polling 'interrupt' - used by things like netconsole to send skbs
 * without having to re-enable interrupts. It's not called while
 * the interrupt routine is executing.
 */



static void ixgb_netpoll(struct net_device *dev)
{
	struct ixgb_adapter *adapter = netdev_priv(dev);

	disable_irq(adapter->pdev->irq);
	ixgb_intr(adapter->pdev->irq, dev);
	enable_irq(adapter->pdev->irq);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jeff Garzik
47
94.00%
1
50.00%
Auke-Jan H Kok
3
6.00%
1
50.00%
Total
50
100.00%
2
100.00%

#endif

/**
 * ixgb_io_error_detected - called when PCI error is detected
 * @pdev:    pointer to pci device with error
 * @state:   pci channel state after error
 *
 * This callback is called by the PCI subsystem whenever
 * a PCI bus error is detected.
 */


static pci_ers_result_t ixgb_io_error_detected(struct pci_dev *pdev,
                                               enum pci_channel_state state)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	netif_device_detach(netdev);

	if (state == pci_channel_io_perm_failure)
		return PCI_ERS_RESULT_DISCONNECT;

	if (netif_running(netdev))
		ixgb_down(adapter, true);

	pci_disable_device(pdev);

	/* Request a slot reset. */
	return PCI_ERS_RESULT_NEED_RESET;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linas Vepstas
54
75.00%
1
25.00%
Dean Nelson
14
19.44%
1
25.00%
Auke-Jan H Kok
3
4.17%
1
25.00%
Joe Perches
1
1.39%
1
25.00%
Total
72
100.00%
4
100.00%

/**
 * ixgb_io_slot_reset - called after the pci bus has been reset.
 * @pdev    pointer to pci device with error
 *
 * This callback is called after the PCI bus has been reset.
 * Basically, this tries to restart the card from scratch.
 * This is a shortened version of the device probe/discovery code,
 * it resembles the first-half of the ixgb_probe() routine.
 */


static pci_ers_result_t ixgb_io_slot_reset(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	if (pci_enable_device(pdev)) {
		netif_err(adapter, probe, adapter->netdev,
			  "Cannot re-enable PCI device after reset\n");
		return PCI_ERS_RESULT_DISCONNECT;
	}

	/* Perform card reset only on one instance of the card */
	if (0 != PCI_FUNC (pdev->devfn))
		return PCI_ERS_RESULT_RECOVERED;

	pci_set_master(pdev);

	netif_carrier_off(netdev);
	netif_stop_queue(netdev);
	ixgb_reset(adapter);

	/* Make sure the EEPROM is good */
	if (!ixgb_validate_eeprom_checksum(&adapter->hw)) {
		netif_err(adapter, probe, adapter->netdev,
			  "After reset, the EEPROM checksum is not valid\n");
		return PCI_ERS_RESULT_DISCONNECT;
	}
	ixgb_get_ee_mac_addr(&adapter->hw, netdev->dev_addr);
	memcpy(netdev->perm_addr, netdev->dev_addr, netdev->addr_len);

	if (!is_valid_ether_addr(netdev->perm_addr)) {
		netif_err(adapter, probe, adapter->netdev,
			  "After reset, invalid MAC address\n");
		return PCI_ERS_RESULT_DISCONNECT;
	}

	return PCI_ERS_RESULT_RECOVERED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linas Vepstas
152
84.92%
1
33.33%
Joe Perches
24
13.41%
1
33.33%
Auke-Jan H Kok
3
1.68%
1
33.33%
Total
179
100.00%
3
100.00%

/**
 * ixgb_io_resume - called when its OK to resume normal operations
 * @pdev    pointer to pci device with error
 *
 * The error recovery driver tells us that its OK to resume
 * normal operation. Implementation resembles the second-half
 * of the ixgb_probe() routine.
 */


static void ixgb_io_resume(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct ixgb_adapter *adapter = netdev_priv(netdev);

	pci_set_master(pdev);

	if (netif_running(netdev)) {
		if (ixgb_up(adapter)) {
			pr_err("can't bring device back up after reset\n");
			return;
		}
	}

	netif_device_attach(netdev);
	mod_timer(&adapter->watchdog_timer, jiffies);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linas Vepstas
70
93.33%
1
33.33%
Auke-Jan H Kok
3
4.00%
1
33.33%
Joe Perches
2
2.67%
1
33.33%
Total
75
100.00%
3
100.00%

/* ixgb_main.c */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Ganesh Venkatesan
5711
55.66%
11
6.83%
Jeff Garzik
1146
11.17%
5
3.11%
Jesse Brandeburg
610
5.95%
23
14.29%
Auke-Jan H Kok
446
4.35%
19
11.80%
Linas Vepstas
358
3.49%
2
1.24%
Mallikarjuna R Chilakala
316
3.08%
10
6.21%
Alexander Duyck
243
2.37%
3
1.86%
Joe Perches
234
2.28%
7
4.35%
Andrew Morton
181
1.76%
1
0.62%
Michał Mirosław
151
1.47%
4
2.48%
Stephen Hemminger
131
1.28%
9
5.59%
Emil Tantilov
102
0.99%
3
1.86%
Matheos Worku
94
0.92%
2
1.24%
Nicholas Nunley
82
0.80%
1
0.62%
Jeff Kirsher
53
0.52%
2
1.24%
Patrick McHardy
45
0.44%
6
3.73%
Herbert Xu
44
0.43%
3
1.86%
Ajit Khaparde
39
0.38%
1
0.62%
Arnaldo Carvalho de Melo
35
0.34%
6
3.73%
Jiri Pirko
34
0.33%
7
4.35%
Christoph Paasch
22
0.21%
1
0.62%
Andreas Schwab
20
0.19%
1
0.62%
Eric Dumazet
16
0.16%
5
3.11%
Jarod Wilson
15
0.15%
1
0.62%
Dean Nelson
14
0.14%
1
0.62%
David Howells
12
0.12%
2
1.24%
David S. Miller
11
0.11%
2
1.24%
Milind Arun Choudhary
10
0.10%
1
0.62%
Roel Kluin
9
0.09%
1
0.62%
John W. Linville
9
0.09%
1
0.62%
Yi Zou
8
0.08%
1
0.62%
Yang Hongyang
8
0.08%
2
1.24%
Tejun Heo
7
0.07%
1
0.62%
François Romieu
6
0.06%
1
0.62%
Benoit Taine
6
0.06%
1
0.62%
Jon Mason
5
0.05%
1
0.62%
Eliezer Tamir
5
0.05%
1
0.62%
Paul Gortmaker
3
0.03%
1
0.62%
Ben Hutchings
3
0.03%
2
1.24%
Dan Aloni
3
0.03%
1
0.62%
Al Viro
3
0.03%
2
1.24%
Eric W. Biedermann
3
0.03%
1
0.62%
Ian Campbell
2
0.02%
1
0.62%
Russell King
2
0.02%
1
0.62%
Arjan van de Ven
1
0.01%
1
0.62%
Rusty Russell
1
0.01%
1
0.62%
Adrian Bunk
1
0.01%
1
0.62%
Greg Kroah-Hartman
0.00%
0
0.00%
Total
10260
100.00%
161
100.00%
Directory: drivers/net/ethernet/intel/ixgb

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