e1000_main.c

linux-2.4.29操作系统的源码

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

  
  Copyright(c) 1999 - 2004 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
 * 5.3.12	6/7/04
 * - kcompat NETIF_MSG for older kernels (2.4.9) <[e-mail]>
 * - if_mii support and associated kcompat for older kernels
 * - More errlogging support from Jon Mason <[e-mail]>
 * - Fix TSO issues on PPC64 machines -- Jon Mason <[e-mail]>
 * 5.6.5 	11/01/04
 * - Enabling NETIF_F_SG without checksum offload is illegal - 
     John Mason <[e-mail]>
 * 5.6.3        10/26/04
 * - Remove redundant initialization - Jamal Hadi
 * - Reset buffer_info->dma in tx resource cleanup logic
 * 5.6.2	10/12/04
 * - Sparse cleanup - [e-mail]
 * - Fix tx resource cleanup logic
 */

char e1000_driver_name[] = "e1000";
char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
#ifndef CONFIG_E1000_NAPI
#define DRIVERNAPI
#else
#define DRIVERNAPI "-NAPI"
#endif
char e1000_driver_version[] = "5.6.10.1-k1"DRIVERNAPI;
char e1000_copyright[] = "Copyright (c) 1999-2004 Intel Corporation.";

/* e1000_pci_tbl - PCI Device ID Table
 *
 * Last entry must be all 0s
 *
 * Macro expands to...
 *   {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)}
 */
static struct pci_device_id e1000_pci_tbl[] = {
	INTEL_E1000_ETHERNET_DEVICE(0x1000),
	INTEL_E1000_ETHERNET_DEVICE(0x1001),
	INTEL_E1000_ETHERNET_DEVICE(0x1004),
	INTEL_E1000_ETHERNET_DEVICE(0x1008),
	INTEL_E1000_ETHERNET_DEVICE(0x1009),
	INTEL_E1000_ETHERNET_DEVICE(0x100C),
	INTEL_E1000_ETHERNET_DEVICE(0x100D),
	INTEL_E1000_ETHERNET_DEVICE(0x100E),
	INTEL_E1000_ETHERNET_DEVICE(0x100F),
	INTEL_E1000_ETHERNET_DEVICE(0x1010),
	INTEL_E1000_ETHERNET_DEVICE(0x1011),
	INTEL_E1000_ETHERNET_DEVICE(0x1012),
	INTEL_E1000_ETHERNET_DEVICE(0x1013),
	INTEL_E1000_ETHERNET_DEVICE(0x1015),
	INTEL_E1000_ETHERNET_DEVICE(0x1016),
	INTEL_E1000_ETHERNET_DEVICE(0x1017),
	INTEL_E1000_ETHERNET_DEVICE(0x1018),
	INTEL_E1000_ETHERNET_DEVICE(0x1019),
	INTEL_E1000_ETHERNET_DEVICE(0x101D),
	INTEL_E1000_ETHERNET_DEVICE(0x101E),
	INTEL_E1000_ETHERNET_DEVICE(0x1026),
	INTEL_E1000_ETHERNET_DEVICE(0x1027),
	INTEL_E1000_ETHERNET_DEVICE(0x1028),
	INTEL_E1000_ETHERNET_DEVICE(0x1075),
	INTEL_E1000_ETHERNET_DEVICE(0x1076),
	INTEL_E1000_ETHERNET_DEVICE(0x1077),
	INTEL_E1000_ETHERNET_DEVICE(0x1078),
	INTEL_E1000_ETHERNET_DEVICE(0x1079),
	INTEL_E1000_ETHERNET_DEVICE(0x107A),
	INTEL_E1000_ETHERNET_DEVICE(0x107B),
	INTEL_E1000_ETHERNET_DEVICE(0x107C),
	INTEL_E1000_ETHERNET_DEVICE(0x108A),
	/* required last entry */
	{0,}
};

MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);

int e1000_up(struct e1000_adapter *adapter);
void e1000_down(struct e1000_adapter *adapter);
void e1000_reset(struct e1000_adapter *adapter);
int e1000_set_spd_dplx(struct e1000_adapter *adapter, uint16_t spddplx);
int e1000_setup_tx_resources(struct e1000_adapter *adapter);
int e1000_setup_rx_resources(struct e1000_adapter *adapter);
void e1000_free_tx_resources(struct e1000_adapter *adapter);
void e1000_free_rx_resources(struct e1000_adapter *adapter);
void e1000_update_stats(struct e1000_adapter *adapter);

/* Local Function Prototypes */

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 __devexit 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 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_set_multi(struct net_device *netdev);
static void e1000_update_phy_info(unsigned long data);
static void e1000_watchdog(unsigned long data);
static void e1000_82547_tx_fifo_stall(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 irqreturn_t e1000_intr(int irq, void *data, struct pt_regs *regs);
static boolean_t e1000_clean_tx_irq(struct e1000_adapter *adapter);
#ifdef CONFIG_E1000_NAPI
static int e1000_clean(struct net_device *netdev, int *budget);
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter,
                                    int *work_done, int work_to_do);
#else
static boolean_t e1000_clean_rx_irq(struct e1000_adapter *adapter);
#endif
static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
			   int cmd);
void set_ethtool_ops(struct net_device *netdev);
static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
static void e1000_leave_82542_rst(struct e1000_adapter *adapter);
static void e1000_tx_timeout(struct net_device *dev);
static void e1000_tx_timeout_task(struct net_device *dev);
static void e1000_smartspeed(struct e1000_adapter *adapter);
static inline int e1000_82547_fifo_workaround(struct e1000_adapter *adapter,
					      struct sk_buff *skb);

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_suspend(struct pci_dev *pdev, uint32_t state);
#ifdef CONFIG_PM
static int e1000_resume(struct pci_dev *pdev);
#endif

#ifdef CONFIG_NET_POLL_CONTROLLER
/* for netdump / net console */
static void e1000_netpoll (struct net_device *netdev);
#endif

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

/* Exported from other modules */

extern void e1000_check_options(struct e1000_adapter *adapter);

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");

static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");

/**
 * 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);
	}
	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);
	pci_unregister_driver(&e1000_driver);
}

module_exit(e1000_exit_module);

/**
 * e1000_irq_disable - Mask off interrupt generation on the NIC
 * @adapter: board private structure
 **/

static inline void
e1000_irq_disable(struct e1000_adapter *adapter)
{
	atomic_inc(&adapter->irq_sem);
	E1000_WRITE_REG(&adapter->hw, IMC, ~0);
	E1000_WRITE_FLUSH(&adapter->hw);
	synchronize_irq();
}

/**
 * e1000_irq_enable - Enable default interrupt generation settings
 * @adapter: board private structure
 **/

static inline void
e1000_irq_enable(struct e1000_adapter *adapter)
{
	if(likely(atomic_dec_and_test(&adapter->irq_sem))) {
		E1000_WRITE_REG(&adapter->hw, IMS, IMS_ENABLE_MASK);
		E1000_WRITE_FLUSH(&adapter->hw);
	}
}

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

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

	/* Reset the PHY if it was previously powered down */
	if(adapter->hw.media_type == e1000_media_type_copper) {
		uint16_t mii_reg;
		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
		if(mii_reg & MII_CR_POWER_DOWN)
			e1000_phy_reset(&adapter->hw);
	}

	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);

	if((err = request_irq(adapter->pdev->irq, &e1000_intr,
		              SA_SHIRQ | SA_SAMPLE_RANDOM,
		              netdev->name, netdev)))
		return err;

	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(adapter->pdev->irq, netdev);
	del_timer_sync(&adapter->tx_fifo_stall_timer);
	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);

	/* If WoL is not enabled
	 * Power down the PHY so no link is implied when interface is down */
	if(!adapter->wol && adapter->hw.media_type == e1000_media_type_copper) {
		uint16_t mii_reg;
		e1000_read_phy_reg(&adapter->hw, PHY_CTRL, &mii_reg);
		mii_reg |= MII_CR_POWER_DOWN;
		e1000_write_phy_reg(&adapter->hw, PHY_CTRL, mii_reg);
	}
}

void
e1000_reset(struct e1000_adapter *adapter)
{
	uint32_t pba;

	/* Repartition Pba for greater than 9k mtu
	 * To take effect CTRL.RST is required.
	 */

	if(adapter->hw.mac_type < e1000_82547) {
		if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
			pba = E1000_PBA_40K;
		else
			pba = E1000_PBA_48K;
	} else {
		if(adapter->rx_buffer_len > E1000_RXBUFFER_8192)
			pba = E1000_PBA_22K;
		else
			pba = E1000_PBA_30K;
		adapter->tx_fifo_head = 0;
		adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT;
		adapter->tx_fifo_size =
			(E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT;
		atomic_set(&adapter->tx_fifo_stall, 0);
	}
	E1000_WRITE_REG(&adapter->hw, PBA, pba);

	/* flow control settings */
	adapter->hw.fc_high_water = (pba << E1000_PBA_BYTES_SHIFT) -
				    E1000_FC_HIGH_DIFF;
	adapter->hw.fc_low_water = (pba << E1000_PBA_BYTES_SHIFT) -
				   E1000_FC_LOW_DIFF;
	adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
	adapter->hw.fc_send_xon = 1;
	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);
	if(e1000_init_hw(&adapter->hw))
		DPRINTK(PROBE, ERR, "Hardware Error\n");

	/* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
	E1000_WRITE_REG(&adapter->hw, VET, ETHERNET_IEEE_VLAN_TYPE);

	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;
	int err;
	uint16_t eeprom_data;

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

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

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

	pci_set_master(pdev);

	netdev = alloc_etherdev(sizeof(struct e1000_adapter));
	if(!netdev) {
		err = -ENOMEM;
		goto err_alloc_etherdev;
	}

	SET_MODULE_OWNER(netdev);
	SET_NETDEV_DEV(netdev, &pdev->dev);

	pci_set_drvdata(pdev, netdev);
	adapter = netdev->priv;
	adapter->netdev = netdev;
	adapter->pdev = pdev;
	adapter->hw.back = adapter;
	adapter->msg_enable = (1 << debug) - 1;

	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) {
		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;
		}
	}