e1000_main.c

e1000 8.0.1 version.最新的e1000 linux下的驱动

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

	e1000_reset_hw(&adapter->hw);

	/* make sure we don't intercept ARP packets until we're up */
	e1000_release_manageability(adapter);

	/* make sure the NVM is good */

	if (e1000_validate_nvm_checksum(&adapter->hw) < 0) {
		DPRINTK(PROBE, ERR, "The NVM Checksum Is Not Valid\n");
		err = -EIO;
		goto err_eeprom;
	}

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

	if (e1000_read_mac_addr(&adapter->hw))
		DPRINTK(PROBE, ERR, "NVM 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;
	}

	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, e1000_reset_task);
	INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);

	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:
	case e1000_82543:
		break;
	case e1000_82544:
		e1000_read_nvm(&adapter->hw,
			NVM_INIT_CONTROL2_REG, 1, &eeprom_data);
		eeprom_apme_mask = E1000_EEPROM_82544_APM;
		break;
	case e1000_82546:
	case e1000_82546_rev_3:
		if (adapter->hw.bus.func == 1) {
			e1000_read_nvm(&adapter->hw,
				NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
			break;
		}
		/* Fall Through */
	default:
		e1000_read_nvm(&adapter->hw,
			NVM_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:
		/* Wake events only supported on port A for dual fiber
		 * regardless of eeprom setting */
		if (E1000_READ_REG(&adapter->hw, E1000_STATUS) &
		    E1000_STATUS_FUNC_1)
			adapter->eeprom_wol = 0;
		break;
	case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3:
		/* if quad port adapter, disable WoL on all but port A */
		if (global_quad_port_a != 0)
			adapter->eeprom_wol = 0;
		else
			adapter->flags |= E1000_FLAG_QUAD_PORT_A;
		/* 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_pcie_x4) ? "Width x4" :
		 (hw->bus.width == e1000_bus_width_pcie_x1) ? "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);

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

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

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

	cards_found++;
	return 0;

err_register:
err_hw_init:
err_eeprom:
	if (!e1000_check_reset_block(&adapter->hw))
		e1000_phy_hw_reset(&adapter->hw);

	if (adapter->hw.flash_address)
		iounmap(adapter->hw.flash_address);

	e1000_remove_device(&adapter->hw);
	kfree(adapter->tx_ring);
	kfree(adapter->rx_ring);
err_sw_init:
	iounmap(adapter->hw.hw_addr);
err_ioremap:
	free_netdev(netdev);
err_alloc_etherdev:
	pci_release_regions(pdev);
err_pci_reg:
err_dma:
	pci_disable_device(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);

	/* flush_scheduled work may reschedule our watchdog task, so
	 * explicitly disable watchdog tasks from being rescheduled  */
	set_bit(__E1000_DOWN, &adapter->state);
	del_timer_sync(&adapter->tx_fifo_stall_timer);
	del_timer_sync(&adapter->watchdog_timer);
	del_timer_sync(&adapter->phy_info_timer);

	flush_scheduled_work();

	e1000_release_manageability(adapter);

	unregister_netdev(netdev);

	if (!e1000_check_reset_block(&adapter->hw))
		e1000_phy_hw_reset(&adapter->hw);

	e1000_remove_device(&adapter->hw);

	kfree(adapter->tx_ring);
	kfree(adapter->rx_ring);

	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_device_id = pdev->subsystem_device;

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

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

	adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
	adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETHERNET_FCS_SIZE;
	adapter->min_frame_size = ETH_ZLEN + ETHERNET_FCS_SIZE;

	/* Initialize the hardware-specific values */
	if (e1000_setup_init_funcs(hw, FALSE)) {
		DPRINTK(PROBE, ERR, "Hardware Initialization Failure\n");
		return -EIO;
	}

	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++) {
		struct e1000_rx_ring *rx_ring = &adapter->rx_ring[i];
		netif_napi_add(adapter->netdev, &rx_ring->napi, e1000_poll, 64);
	}
	spin_lock_init(&adapter->tx_queue_lock);
#endif

	/* Explicitly disable IRQ since the NIC can be in any state. */
	e1000_irq_disable(adapter);

	spin_lock_init(&adapter->stats_lock);

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

/**
 * e1000_alloc_queues - Allocate memory for all rings
 * @adapter: board private structure to initialize
 **/
static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
{
	adapter->tx_ring = kcalloc(adapter->num_tx_queues,
	                           sizeof(struct e1000_tx_ring), GFP_KERNEL);
	if (!adapter->tx_ring)
		return -ENOMEM;

	adapter->rx_ring = kcalloc(adapter->num_rx_queues,
	                           sizeof(struct e1000_rx_ring), GFP_KERNEL);
	if (!adapter->rx_ring) {
		kfree(adapter->tx_ring);
		return -ENOMEM;
	}


	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->state))
		return -EBUSY;

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

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

	if (adapter->hw.phy.media_type == e1000_media_type_copper)
		e1000_power_up_phy(&adapter->hw);

#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)) {
		e1000_update_mng_vlan(adapter);
	}
#endif

	/* before we allocate an interrupt, we must be ready to handle it.
	 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
	 * as soon as we call pci_request_irq, so we have to setup our
	 * clean_rx handler before we do so.  */
	e1000_configure(adapter);


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

	/* From here on the code is the same as e1000_up() */
	clear_bit(__E1000_DOWN, &adapter->state);

	e1000_napi_enable_all(adapter);

	e1000_irq_enable(adapter);

	/* fire a link status change interrupt to start the watchdog */
	E1000_WRITE_REG(&adapter->hw, E1000_ICS, E1000_ICS_LSC);

	return E1000_SUCCESS;

err_req_irq:
	/* Power down the PHY so no link is implied when interface is down *
	 * The PHY cannot be powered down if any of the following is TRUE *
	 * (a) WoL is enabled
	 * (b) AMT is active
	 * (c) SoL/IDER session is active */
	if (!adapter->wol && adapter->hw.mac.type >= e1000_82540 &&
	   adapter->hw.phy.media_type == e1000_media_type_copper)
		e1000_power_down_phy(&adapter->hw);
	e1000_free_all_rx_resources(adapter);
err_setup_rx:
	e1000_free_all_tx_resources(adapter);
err_setup_tx:
	e1000_reset(adapter);

	return err;
}

/**
 * e1000_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 e1000_close(struct net_device *netdev)
{
	struct e1000_adapter *adapter = netdev_priv(netdev);

	WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
	e1000_down(adapter);
	/* Power down the PHY so no link is implied when interface is down *
	 * The PHY cannot be powered down if any of the following is TRUE *
	 * (a) WoL is enabled
	 * (b) AMT is active
	 * (c) SoL/IDER session is active */
	if (!adapter->wol && adapter->hw.mac.type >= e1000_82540 &&
	   adapter->hw.phy.media_type == e1000_media_type_copper)
		e1000_power_down_phy(&adapter->hw);
	e1000_free_irq(adapter);

	e1000_free_all_tx_resources(adapter);
	e1000_free_all_rx_resources(adapter);

#ifdef NETIF_F_HW_VLAN_TX
	/* kill manageability vlan ID if supported, but not if a vlan with
	 * the same ID is registered on the host OS (let 8021q kill it) */
	if ((adapter->hw.mng_cookie.status &
			  E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
	     !(adapter->vlgrp &&
	       vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) {
		e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
	}
#endif

	return 0;
}

/**
 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary
 * @adapter: address of board private structure
 * @start: address of beginning of memory
 * @len: length of memory
 **/
static bool e1000_check_64k_bound(struct e1000_adapter *adapter,
                                       void *start, unsigned long len)
{
	unsigned long begin = (unsigned long) start;