e1000_main.c

e1000最新官方源码

				   NETIF_F_HW_VLAN_FILTER;
		if (adapter->hw.mac_type == e1000_ich8lan)
			netdev->features &= ~NETIF_F_HW_VLAN_FILTER;
#else
		netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM;
#endif
	}

#ifdef NETIF_F_TSO
	if ((adapter->hw.mac_type >= e1000_82544) &&
	   (adapter->hw.mac_type != e1000_82547))
		netdev->features |= NETIF_F_TSO;

#ifdef NETIF_F_TSO6
	if (adapter->hw.mac_type > e1000_82547_rev_2)
		netdev->features |= NETIF_F_TSO6;
#endif
#endif
	if (pci_using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

#endif
#ifdef NETIF_F_LLTX
	netdev->features |= NETIF_F_LLTX;
#endif

	adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);

	/* initialize eeprom parameters */

	if (e1000_init_eeprom_params(&adapter->hw)) {
		E1000_ERR("EEPROM initialization failed\n");
		return -EIO;
	}

	/* before reading the EEPROM, reset the controller to
	 * put the device in a known good starting state */

	e1000_reset_hw(&adapter->hw);

	/* make sure the EEPROM is good */

	if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
		DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
		err = -EIO;
		goto err_eeprom;
	}

	/* copy the MAC address out of the EEPROM */

	if (e1000_read_mac_addr(&adapter->hw))
		DPRINTK(PROBE, ERR, "EEPROM Read Error\n");
	memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);
#ifdef ETHTOOL_GPERMADDR
	memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);

	if (!is_valid_ether_addr(netdev->perm_addr)) {
#else
	if (!is_valid_ether_addr(netdev->dev_addr)) {
#endif
		DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
		err = -EIO;
		goto err_eeprom;
	}

	e1000_get_bus_info(&adapter->hw);

	init_timer(&adapter->tx_fifo_stall_timer);
	adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall;
	adapter->tx_fifo_stall_timer.data = (unsigned long) adapter;

	init_timer(&adapter->watchdog_timer);
	adapter->watchdog_timer.function = &e1000_watchdog;
	adapter->watchdog_timer.data = (unsigned long) adapter;

	init_timer(&adapter->phy_info_timer);
	adapter->phy_info_timer.function = &e1000_update_phy_info;
	adapter->phy_info_timer.data = (unsigned long) adapter;

	INIT_WORK(&adapter->reset_task,
		(void (*)(void *))e1000_reset_task, netdev);

	e1000_check_options(adapter);

	/* Initial Wake on LAN setting
	 * If APM wake is enabled in the EEPROM,
	 * enable the ACPI Magic Packet filter
	 */

	switch (adapter->hw.mac_type) {
	case e1000_82542_rev2_0:
	case e1000_82542_rev2_1:
	case e1000_82543:
		break;
	case e1000_82544:
		e1000_read_eeprom(&adapter->hw,
			EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data);
		eeprom_apme_mask = E1000_EEPROM_82544_APM;
		break;
	case e1000_ich8lan:
		e1000_read_eeprom(&adapter->hw,
			EEPROM_INIT_CONTROL1_REG, 1, &eeprom_data);
		eeprom_apme_mask = E1000_EEPROM_ICH8_APME;
		break;
	case e1000_82546:
	case e1000_82546_rev_3:
	case e1000_82571:
	case e1000_80003es2lan:
		if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1){
			e1000_read_eeprom(&adapter->hw,
				EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
			break;
		}
		/* Fall Through */
	default:
		e1000_read_eeprom(&adapter->hw,
			EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
		break;
	}
	if (eeprom_data & eeprom_apme_mask)
		adapter->eeprom_wol |= E1000_WUFC_MAG;

	/* now that we have the eeprom settings, apply the special cases
	 * where the eeprom may be wrong or the board simply won't support
	 * wake on lan on a particular port */
	switch (pdev->device) {
	case E1000_DEV_ID_82546GB_PCIE:
		adapter->eeprom_wol = 0;
		break;
	case E1000_DEV_ID_82546EB_FIBER:
	case E1000_DEV_ID_82546GB_FIBER:
	case E1000_DEV_ID_82571EB_FIBER:
		/* Wake events only supported on port A for dual fiber
		 * regardless of eeprom setting */
		if (E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_FUNC_1)
			adapter->eeprom_wol = 0;
		break;
	case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
	case E1000_DEV_ID_82571EB_QUAD_COPPER:
	case E1000_DEV_ID_82571EB_QUAD_COPPER_LOWPROFILE:
		/* if quad port adapter, disable WoL on all but port A */
		if (global_quad_port_a != 0)
			adapter->eeprom_wol = 0;
		else
			adapter->quad_port_a = 1;
		/* Reset for multiple quad port adapters */
		if (++global_quad_port_a == 4)
			global_quad_port_a = 0;
		break;
	}

	/* initialize the wol settings based on the eeprom settings */
	adapter->wol = adapter->eeprom_wol;

	/* print bus type/speed/width info */
	{
	struct e1000_hw *hw = &adapter->hw;
	DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ",
		((hw->bus_type == e1000_bus_type_pcix) ? "-X" :
		 (hw->bus_type == e1000_bus_type_pci_express ? " Express":"")),
		((hw->bus_speed == e1000_bus_speed_2500) ? "2.5Gb/s" :
		 (hw->bus_speed == e1000_bus_speed_133) ? "133MHz" :
		 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" :
		 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" :
		 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"),
		((hw->bus_width == e1000_bus_width_64) ? "64-bit" :
		 (hw->bus_width == e1000_bus_width_pciex_4) ? "Width x4" :
		 (hw->bus_width == e1000_bus_width_pciex_1) ? "Width x1" :
		 "32-bit"));
	}

	for (i = 0; i < 6; i++)
		printk("%2.2x%c", netdev->dev_addr[i], i == 5 ? '\n' : ':');

	/* reset the hardware with the new settings */
	e1000_reset(adapter);

	/* If the controller is 82573 and f/w is AMT, do not set
	 * DRV_LOAD until the interface is up.  For all other cases,
	 * let the f/w know that the h/w is now under the control
	 * of the driver. */
	if (adapter->hw.mac_type != e1000_82573 ||
	    !e1000_check_mng_mode(&adapter->hw))
		e1000_get_hw_control(adapter);

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

	/* tell the stack to leave us alone until e1000_open() is called */
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n");

	cards_found++;
	return 0;

err_register:
	if (adapter->hw.flash_address)
		iounmap(adapter->hw.flash_address);
err_flashmap:
err_sw_init:
err_eeprom:
	iounmap(adapter->hw.hw_addr);
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
	return err;
}

/**
 * e1000_remove - Device Removal Routine
 * @pdev: PCI device information struct
 *
 * e1000_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 __devexit
e1000_remove(struct pci_dev *pdev)
{
	struct net_device *netdev = pci_get_drvdata(pdev);
	struct e1000_adapter *adapter = netdev_priv(netdev);
	uint32_t manc;
#ifdef CONFIG_E1000_NAPI
	int i;
#endif

	flush_scheduled_work();

	if (adapter->hw.mac_type >= e1000_82540 &&
	    adapter->hw.mac_type < e1000_82571 &&
	    adapter->hw.media_type == e1000_media_type_copper) {
		manc = E1000_READ_REG(&adapter->hw, MANC);
		if (manc & E1000_MANC_SMBUS_EN) {
			manc |= E1000_MANC_ARP_EN;
			E1000_WRITE_REG(&adapter->hw, MANC, manc);
		}
	}

	/* Release control of h/w to f/w.  If f/w is AMT enabled, this
	 * would have already happened in close and is redundant. */
	e1000_release_hw_control(adapter);

	unregister_netdev(netdev);
#ifdef CONFIG_E1000_NAPI
	for (i = 0; i < adapter->num_rx_queues; i++)
		dev_put(&adapter->polling_netdev[i]);
#endif

	if (!e1000_check_phy_reset_block(&adapter->hw))
		e1000_phy_hw_reset(&adapter->hw);

	kfree(adapter->tx_ring);
	kfree(adapter->rx_ring);
#ifdef CONFIG_E1000_NAPI
	kfree(adapter->polling_netdev);
#endif

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

	free_netdev(netdev);

	pci_disable_device(pdev);
}

/**
 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
 * @adapter: board private structure to initialize
 *
 * e1000_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 __devinit
e1000_sw_init(struct e1000_adapter *adapter)
{
	struct e1000_hw *hw = &adapter->hw;
	struct net_device *netdev = adapter->netdev;
	struct pci_dev *pdev = adapter->pdev;
#ifdef CONFIG_E1000_NAPI
	int i;
#endif

	/* 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;

	pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);

	pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);

	adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
	adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
	hw->max_frame_size = netdev->mtu +
			     ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
	hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE;

	/* identify the MAC */

	if (e1000_set_mac_type(hw)) {
		DPRINTK(PROBE, ERR, "Unknown MAC Type\n");
		return -EIO;
	}

	switch (hw->mac_type) {
	default:
		break;
	case e1000_82541:
	case e1000_82547:
	case e1000_82541_rev_2:
	case e1000_82547_rev_2:
		hw->phy_init_script = 1;
		break;
	}

	e1000_set_media_type(hw);

	hw->wait_autoneg_complete = FALSE;
	hw->tbi_compatibility_en = TRUE;
	hw->adaptive_ifs = TRUE;

	/* Copper options */

	if (hw->media_type == e1000_media_type_copper) {
		hw->mdix = AUTO_ALL_MODES;
		hw->disable_polarity_correction = FALSE;
		hw->master_slave = E1000_MASTER_SLAVE;
	}

	adapter->num_tx_queues = 1;
	adapter->num_rx_queues = 1;

	if (e1000_alloc_queues(adapter)) {
		DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
		return -ENOMEM;
	}

#ifdef CONFIG_E1000_NAPI
	for (i = 0; i < adapter->num_rx_queues; i++) {
		adapter->polling_netdev[i].priv = adapter;
		adapter->polling_netdev[i].poll = &e1000_clean;
		adapter->polling_netdev[i].weight = 64;
		dev_hold(&adapter->polling_netdev[i]);
		set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
	}
	spin_lock_init(&adapter->tx_queue_lock);
#endif

	atomic_set(&adapter->irq_sem, 1);
	spin_lock_init(&adapter->stats_lock);

	set_bit(__E1000_DOWN, &adapter->flags);
	return 0;
}

/**
 * e1000_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 *
 * We allocate one ring per queue at run-time since we don't know the
 * number of queues at compile-time.  The polling_netdev array is
 * intended for Multiqueue, but should work fine with a single queue.
 **/

static int __devinit
e1000_alloc_queues(struct e1000_adapter *adapter)
{
	int size;

	size = sizeof(struct e1000_tx_ring) * adapter->num_tx_queues;
	adapter->tx_ring = kmalloc(size, GFP_KERNEL);
	if (!adapter->tx_ring)
		return -ENOMEM;
	memset(adapter->tx_ring, 0, size);

	size = sizeof(struct e1000_rx_ring) * adapter->num_rx_queues;
	adapter->rx_ring = kmalloc(size, GFP_KERNEL);
	if (!adapter->rx_ring) {
		kfree(adapter->tx_ring);
		return -ENOMEM;
	}
	memset(adapter->rx_ring, 0, size);

#ifdef CONFIG_E1000_NAPI
	size = sizeof(struct net_device) * adapter->num_rx_queues;
	adapter->polling_netdev = kmalloc(size, GFP_KERNEL);
	if (!adapter->polling_netdev) {
		kfree(adapter->tx_ring);
		kfree(adapter->rx_ring);
		return -ENOMEM;
	}
	memset(adapter->polling_netdev, 0, size);
#endif

	return E1000_SUCCESS;
}

/**
 * e1000_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
e1000_open(struct net_device *netdev)
{
	struct e1000_adapter *adapter = netdev_priv(netdev);
	int err;

	/* disallow open during test */
	if (test_bit(__E1000_TESTING, &adapter->flags))
		return -EBUSY;

	/* allocate transmit descriptors */
	if ((err = e1000_setup_all_tx_resources(adapter)))
		goto err_setup_tx;

	/* allocate receive descriptors */
	if ((err = e1000_setup_all_rx_resources(adapter)))
		goto err_setup_rx;

	err = e1000_request_irq(adapter);
	if (err)
		goto err_up;

	e1000_power_up_phy(adapter);

	if ((err = e1000_up(adapter)))
		goto err_up;
#ifdef NETIF_F_HW_VLAN_TX
	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
	if ((adapter->hw.mng_cookie.status &
			  E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) {
		e1000_update_mng_vlan(adapter);
	}