e1000_main.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

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

  
  Copyright(c) 1999 - 2002 Intel Corporation. All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it 
  under the terms of the GNU General Public License as published by the Free 
  Software Foundation; either version 2 of the License, or (at your option) 
  any later version.
  
  This program is distributed in the hope that 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., 59 
  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  
  The full GNU General Public License is included in this distribution in the
  file called LICENSE.
  
  Contact Information:
  Linux NICS <[e-mail]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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

#include "e1000.h"

/* Change Log
 *
 * 4.4.19       11/27/02
 *   o Feature: Added user-settable knob for interrupt throttle rate (ITR).
 *   o Cleanup: removed large static array allocations.
 *   o Cleanup: C99 struct initializer format.
 *   o Bug fix: restore VLAN settings when interface is brought up.
 *   o Bug fix: return cleanly in probe if error in detecting MAC type.
 *   o Bug fix: Wake up on magic packet by default only if enabled in eeprom.
 *   o Bug fix: Validate MAC address in set_mac.
 *   o Bug fix: Throw away zero-length Tx skbs.
 *   o Bug fix: Make ethtool EEPROM acceses work on older versions of ethtool.
 * 
 * 4.4.12       10/15/02
 *   o Clean up: use members of pci_device rather than direct calls to
 *     pci_read_config_word.
 *   o Bug fix: changed default flow control settings.
 *   o Clean up: ethtool file now has an inclusive list for adapters in the
 *     Wake-On-LAN capabilities instead of an exclusive list.
 *   o Bug fix: miscellaneous WoL bug fixes.
 *   o Added software interrupt for clearing rx ring
 *   o Bug fix: easier to undo "forcing" of 1000/fd using ethtool.
 *   o Now setting netdev->mem_end in e1000_probe.
 *   o Clean up: Moved tx_timeout from interrupt context to process context
 *     using schedule_task.
 * 
 * 4.3.15       8/9/02
 */

char e1000_driver_name[] = "e1000";
char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
char e1000_driver_version[] = "4.4.19-k1";
char e1000_copyright[] = "Copyright (c) 1999-2002 Intel Corporation.";

/* e1000_pci_tbl - PCI Device ID Table
 *
 * Private driver_data field (last one) stores an index into e1000_strings
 * 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, String Index }
 */
static struct pci_device_id e1000_pci_tbl[] __devinitdata = {
	/* Intel(R) PRO/1000 Network Connection */
	{0x8086, 0x1000, 0x8086, 0x1000, 0, 0, 0},
	{0x8086, 0x1001, 0x8086, 0x1003, 0, 0, 0},
	{0x8086, 0x1004, 0x8086, 0x1004, 0, 0, 0},
	{0x8086, 0x1008, 0x8086, 0x1107, 0, 0, 0},
	{0x8086, 0x1009, 0x8086, 0x1109, 0, 0, 0},
	{0x8086, 0x100C, 0x8086, 0x1112, 0, 0, 0},
	{0x8086, 0x100E, 0x8086, 0x001E, 0, 0, 0},
	/* Compaq Gigabit Ethernet Server Adapter */
	{0x8086, 0x1000, 0x0E11, PCI_ANY_ID, 0, 0, 1},
	{0x8086, 0x1001, 0x0E11, PCI_ANY_ID, 0, 0, 1},
	{0x8086, 0x1004, 0x0E11, PCI_ANY_ID, 0, 0, 1},
	/* IBM Mobile, Desktop & Server Adapters */
	{0x8086, 0x1000, 0x1014, PCI_ANY_ID, 0, 0, 2},
	{0x8086, 0x1001, 0x1014, PCI_ANY_ID, 0, 0, 2},
	{0x8086, 0x1004, 0x1014, PCI_ANY_ID, 0, 0, 2},
	/* Generic */
	{0x8086, 0x1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1004, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1008, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1009, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x100C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x100D, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x100E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x100F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1010, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1012, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1016, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x1017, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0x8086, 0x101E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	/* required last entry */
	{0,}
};

MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

static char *e1000_strings[] = {
	"Intel(R) PRO/1000 Network Connection",
	"Compaq Gigabit Ethernet Server Adapter",
	"IBM Mobile, Desktop & Server Adapters"
};

/* Local Function Prototypes */

int e1000_up(struct e1000_adapter *adapter);
void e1000_down(struct e1000_adapter *adapter);
void e1000_reset(struct e1000_adapter *adapter);

static int e1000_init_module(void);
static void e1000_exit_module(void);
static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
static void e1000_remove(struct pci_dev *pdev);
static int e1000_sw_init(struct e1000_adapter *adapter);
static int e1000_open(struct net_device *netdev);
static int e1000_close(struct net_device *netdev);
static int e1000_setup_tx_resources(struct e1000_adapter *adapter);
static int e1000_setup_rx_resources(struct e1000_adapter *adapter);
static void e1000_configure_tx(struct e1000_adapter *adapter);
static void e1000_configure_rx(struct e1000_adapter *adapter);
static void e1000_setup_rctl(struct e1000_adapter *adapter);
static void e1000_clean_tx_ring(struct e1000_adapter *adapter);
static void e1000_clean_rx_ring(struct e1000_adapter *adapter);
static void e1000_free_tx_resources(struct e1000_adapter *adapter);
static void e1000_free_rx_resources(struct e1000_adapter *adapter);
static void e1000_set_multi(struct net_device *netdev);
static void e1000_update_phy_info(unsigned long data);
static void e1000_watchdog(unsigned long data);
static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev);
static struct net_device_stats * e1000_get_stats(struct net_device *netdev);
static int e1000_change_mtu(struct net_device *netdev, int new_mtu);
static int e1000_set_mac(struct net_device *netdev, void *p);
static void e1000_update_stats(struct e1000_adapter *adapter);
static inline void e1000_irq_disable(struct e1000_adapter *adapter);
static inline void e1000_irq_enable(struct e1000_adapter *adapter);
static void e1000_intr(int irq, void *data, struct pt_regs *regs);
static void e1000_clean_tx_irq(struct e1000_adapter *adapter);
static void e1000_clean_rx_irq(struct e1000_adapter *adapter);
static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
static inline void e1000_rx_checksum(struct e1000_adapter *adapter,
                                     struct e1000_rx_desc *rx_desc,
                                     struct sk_buff *skb);
static void e1000_tx_timeout(struct net_device *dev);
static void e1000_tx_timeout_task(struct net_device *dev);

static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp);
static void e1000_vlan_rx_add_vid(struct net_device *netdev, uint16_t vid);
static void e1000_vlan_rx_kill_vid(struct net_device *netdev, uint16_t vid);
static void e1000_restore_vlan(struct e1000_adapter *adapter);

static int e1000_notify_reboot(struct notifier_block *, unsigned long event, void *ptr);
static int e1000_notify_netdev(struct notifier_block *, unsigned long event, void *ptr);
static int e1000_suspend(struct pci_dev *pdev, uint32_t state);
#ifdef CONFIG_PM
static int e1000_resume(struct pci_dev *pdev);
#endif

struct notifier_block e1000_notifier_reboot = {
	.notifier_call	= e1000_notify_reboot,
	.next		= NULL,
	.priority	= 0
};

struct notifier_block e1000_notifier_netdev = {
	.notifier_call	= e1000_notify_netdev,
	.next		= NULL,
	.priority	= 0
};

/* Exported from other modules */

extern void e1000_check_options(struct e1000_adapter *adapter);
extern void e1000_proc_dev_setup(struct e1000_adapter *adapter);
extern void e1000_proc_dev_free(struct e1000_adapter *adapter);
extern int e1000_ethtool_ioctl(struct net_device *netdev, struct ifreq *ifr);

static struct pci_driver e1000_driver = {
	.name     = e1000_driver_name,
	.id_table = e1000_pci_tbl,
	.probe    = e1000_probe,
	.remove   = __devexit_p(e1000_remove),
	/* Power Managment Hooks */
#ifdef CONFIG_PM
	.suspend  = e1000_suspend,
	.resume   = e1000_resume
#endif
};

MODULE_AUTHOR("Intel Corporation, <[e-mail]>");
MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
MODULE_LICENSE("GPL");

/**
 * e1000_init_module - Driver Registration Routine
 *
 * e1000_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/

static int __init
e1000_init_module(void)
{
	int ret;
	printk(KERN_INFO "%s - version %s\n",
	       e1000_driver_string, e1000_driver_version);

	printk(KERN_INFO "%s\n", e1000_copyright);

	ret = pci_module_init(&e1000_driver);
	if(ret >= 0) {
		register_reboot_notifier(&e1000_notifier_reboot);
		register_netdevice_notifier(&e1000_notifier_netdev);
	}
	return ret;
}

module_init(e1000_init_module);

/**
 * e1000_exit_module - Driver Exit Cleanup Routine
 *
 * e1000_exit_module is called just before the driver is removed
 * from memory.
 **/

static void __exit
e1000_exit_module(void)
{
	unregister_reboot_notifier(&e1000_notifier_reboot);
	unregister_netdevice_notifier(&e1000_notifier_netdev);
	pci_unregister_driver(&e1000_driver);
}

module_exit(e1000_exit_module);


int
e1000_up(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	if(request_irq(netdev->irq, &e1000_intr, SA_SHIRQ | SA_SAMPLE_RANDOM,
	               netdev->name, netdev))
		return -1;

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

	e1000_set_multi(netdev);
	e1000_restore_vlan(adapter);

	e1000_configure_tx(adapter);
	e1000_setup_rctl(adapter);
	e1000_configure_rx(adapter);
	e1000_alloc_rx_buffers(adapter);

	mod_timer(&adapter->watchdog_timer, jiffies);
	e1000_irq_enable(adapter);

	return 0;
}

void
e1000_down(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;

	e1000_irq_disable(adapter);
	free_irq(netdev->irq, netdev);
	del_timer_sync(&adapter->watchdog_timer);
	del_timer_sync(&adapter->phy_info_timer);
	adapter->link_speed = 0;
	adapter->link_duplex = 0;
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	e1000_reset(adapter);
	e1000_clean_tx_ring(adapter);
	e1000_clean_rx_ring(adapter);
}

void
e1000_reset(struct e1000_adapter *adapter)
{
	/* Repartition Pba for greater than 9k mtu
	 * To take effect CTRL.RST is required.
	 */

	if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
		E1000_WRITE_REG(&adapter->hw, PBA, E1000_JUMBO_PBA);
	else
		E1000_WRITE_REG(&adapter->hw, PBA, E1000_DEFAULT_PBA);

	adapter->hw.fc = adapter->hw.original_fc;
	e1000_reset_hw(&adapter->hw);
	if(adapter->hw.mac_type >= e1000_82544)
		E1000_WRITE_REG(&adapter->hw, WUC, 0);
	e1000_init_hw(&adapter->hw);
	e1000_reset_adaptive(&adapter->hw);
	e1000_phy_get_info(&adapter->hw, &adapter->phy_info);
}

/**
 * e1000_probe - Device Initialization Routine
 * @pdev: PCI device information struct
 * @ent: entry in e1000_pci_tbl
 *
 * Returns 0 on success, negative on failure
 *
 * e1000_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 __devinit
e1000_probe(struct pci_dev *pdev,
            const struct pci_device_id *ent)
{
	struct net_device *netdev;
	struct e1000_adapter *adapter;
	static int cards_found = 0;
	unsigned long mmio_start;
	int mmio_len;
	int pci_using_dac;
	int i;
	uint16_t eeprom_data;

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

	if(!(i = pci_set_dma_mask(pdev, PCI_DMA_64BIT))) {
		pci_using_dac = 1;
	} else {
		if((i = pci_set_dma_mask(pdev, PCI_DMA_32BIT))) {
			E1000_ERR("No usable DMA configuration, aborting\n");
			return i;
		}
		pci_using_dac = 0;
	}

	if((i = pci_request_regions(pdev, e1000_driver_name)))
		return i;

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct e1000_adapter));
	if(!netdev)
		goto err_alloc_etherdev;

	SET_MODULE_OWNER(netdev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev->priv;
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.back = adapter;

	mmio_start = pci_resource_start(pdev, BAR_0);
	mmio_len = pci_resource_len(pdev, BAR_0);

	adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
	if(!adapter->hw.hw_addr)
		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->open = &e1000_open;
	netdev->stop = &e1000_close;
	netdev->hard_start_xmit = &e1000_xmit_frame;
	netdev->get_stats = &e1000_get_stats;
	netdev->set_multicast_list = &e1000_set_multi;
	netdev->set_mac_address = &e1000_set_mac;
	netdev->change_mtu = &e1000_change_mtu;
	netdev->do_ioctl = &e1000_ioctl;
	netdev->tx_timeout = &e1000_tx_timeout;
	netdev->watchdog_timeo = HZ;
	netdev->vlan_rx_register = e1000_vlan_rx_register;
	netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
	netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;

	netdev->irq = pdev->irq;
	netdev->mem_start = mmio_start;
	netdev->mem_end = mmio_start + mmio_len;
	netdev->base_addr = adapter->hw.io_base;

	adapter->bd_number = cards_found;
	adapter->id_string = e1000_strings[ent->driver_data];

	/* setup the private structure */

	if(e1000_sw_init(adapter))
		goto err_sw_init;

	if(adapter->hw.mac_type >= e1000_82543) {
		netdev->features = NETIF_F_SG |
			           NETIF_F_HW_CSUM |
		       	           NETIF_F_HW_VLAN_TX |
		                   NETIF_F_HW_VLAN_RX |
				   NETIF_F_HW_VLAN_FILTER;
	} else {
		netdev->features = NETIF_F_SG;
	}

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

	/* make sure the EEPROM is good */

	if(e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
		printk(KERN_ERR "The EEPROM Checksum Is Not Valid\n");
		goto err_eeprom;
	}

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

	e1000_read_mac_addr(&adapter->hw);
	memcpy(netdev->dev_addr, adapter->hw.mac_addr, netdev->addr_len);

	if(!is_valid_ether_addr(netdev->dev_addr))
		goto err_eeprom;

	e1000_read_part_num(&adapter->hw, &(adapter->part_num));

	e1000_get_bus_info(&adapter->hw);

	if((adapter->hw.mac_type == e1000_82544) &&
	   (adapter->hw.bus_type == e1000_bus_type_pcix))

		adapter->max_data_per_txd = 4096;
	else
		adapter->max_data_per_txd = MAX_JUMBO_FRAME_SIZE;


	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;