e1000_main.c

linux2.6.16版本

	}
}

int
e1000_up(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	int i, 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);
	/* call E1000_DESC_UNUSED which always leaves
	 * at least 1 descriptor unused to make sure
	 * next_to_use != next_to_clean */
	for (i = 0; i < adapter->num_rx_queues; i++) {
		struct e1000_rx_ring *ring = &adapter->rx_ring[i];
		adapter->alloc_rx_buf(adapter, ring,
		                      E1000_DESC_UNUSED(ring));
	}

#ifdef CONFIG_PCI_MSI
	if (adapter->hw.mac_type > e1000_82547_rev_2) {
		adapter->have_msi = TRUE;
		if ((err = pci_enable_msi(adapter->pdev))) {
			DPRINTK(PROBE, ERR,
			 "Unable to allocate MSI interrupt Error: %d\n", err);
			adapter->have_msi = FALSE;
		}
	}
#endif
	if ((err = request_irq(adapter->pdev->irq, &e1000_intr,
		              SA_SHIRQ | SA_SAMPLE_RANDOM,
		              netdev->name, netdev))) {
		DPRINTK(PROBE, ERR,
		    "Unable to allocate interrupt Error: %d\n", err);
		return err;
	}

#ifdef CONFIG_E1000_MQ
	e1000_setup_queue_mapping(adapter);
#endif

	adapter->tx_queue_len = netdev->tx_queue_len;

	mod_timer(&adapter->watchdog_timer, jiffies);

#ifdef CONFIG_E1000_NAPI
	netif_poll_enable(netdev);
#endif
	e1000_irq_enable(adapter);

	return 0;
}

void
e1000_down(struct e1000_adapter *adapter)
{
	struct net_device *netdev = adapter->netdev;
	boolean_t mng_mode_enabled = (adapter->hw.mac_type >= e1000_82571) &&
				     e1000_check_mng_mode(&adapter->hw);

	e1000_irq_disable(adapter);
#ifdef CONFIG_E1000_MQ
	while (atomic_read(&adapter->rx_sched_call_data.count) != 0);
#endif
	free_irq(adapter->pdev->irq, netdev);
#ifdef CONFIG_PCI_MSI
	if (adapter->hw.mac_type > e1000_82547_rev_2 &&
	   adapter->have_msi == TRUE)
		pci_disable_msi(adapter->pdev);
#endif
	del_timer_sync(&adapter->tx_fifo_stall_timer);
	del_timer_sync(&adapter->watchdog_timer);
	del_timer_sync(&adapter->phy_info_timer);

#ifdef CONFIG_E1000_NAPI
	netif_poll_disable(netdev);
#endif
	netdev->tx_queue_len = adapter->tx_queue_len;
	adapter->link_speed = 0;
	adapter->link_duplex = 0;
	netif_carrier_off(netdev);
	netif_stop_queue(netdev);

	e1000_reset(adapter);
	e1000_clean_all_tx_rings(adapter);
	e1000_clean_all_rx_rings(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.media_type == e1000_media_type_copper &&
	   !(E1000_READ_REG(&adapter->hw, MANC) & E1000_MANC_SMBUS_EN) &&
	   !mng_mode_enabled &&
	   !e1000_check_phy_reset_block(&adapter->hw)) {
		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);
		mdelay(1);
	}
}

void
e1000_reset(struct e1000_adapter *adapter)
{
	uint32_t pba, manc;
	uint16_t fc_high_water_mark = E1000_FC_HIGH_DIFF;

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

	switch (adapter->hw.mac_type) {
	case e1000_82547:
	case e1000_82547_rev_2:
		pba = E1000_PBA_30K;
		break;
	case e1000_82571:
	case e1000_82572:
		pba = E1000_PBA_38K;
		break;
	case e1000_82573:
		pba = E1000_PBA_12K;
		break;
	default:
		pba = E1000_PBA_48K;
		break;
	}

	if ((adapter->hw.mac_type != e1000_82573) &&
	   (adapter->netdev->mtu > E1000_RXBUFFER_8192))
		pba -= 8; /* allocate more FIFO for Tx */


	if (adapter->hw.mac_type == e1000_82547) {
		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 */
	/* Set the FC high water mark to 90% of the FIFO size.
	 * Required to clear last 3 LSB */
	fc_high_water_mark = ((pba * 9216)/10) & 0xFFF8;

	adapter->hw.fc_high_water = fc_high_water_mark;
	adapter->hw.fc_low_water = fc_high_water_mark - 8;
	adapter->hw.fc_pause_time = E1000_FC_PAUSE_TIME;
	adapter->hw.fc_send_xon = 1;
	adapter->hw.fc = adapter->hw.original_fc;

	/* Allow time for pending master requests to run */
	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");
	e1000_update_mng_vlan(adapter);
	/* 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);
	if (adapter->en_mng_pt) {
		manc = E1000_READ_REG(&adapter->hw, MANC);
		manc |= (E1000_MANC_ARP_EN | E1000_MANC_EN_MNG2HOST);
		E1000_WRITE_REG(&adapter->hw, MANC, manc);
	}
}

/**
 * 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;
	unsigned long mmio_start, mmio_len;

	static int cards_found = 0;
	int i, err, pci_using_dac;
	uint16_t eeprom_data;
	uint16_t eeprom_apme_mask = E1000_EEPROM_APME;
	if ((err = pci_enable_device(pdev)))
		return err;

	if (!(err = pci_set_dma_mask(pdev, DMA_64BIT_MASK))) {
		pci_using_dac = 1;
	} else {
		if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
			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(netdev);
	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;
		}
	}

	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;
	e1000_set_ethtool_ops(netdev);
	netdev->tx_timeout = &e1000_tx_timeout;
	netdev->watchdog_timeo = 5 * HZ;
#ifdef CONFIG_E1000_NAPI
	netdev->poll = &e1000_clean;
	netdev->weight = 64;
#endif
	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;
#ifdef CONFIG_NET_POLL_CONTROLLER
	netdev->poll_controller = e1000_netpoll;
#endif
	strcpy(netdev->name, pci_name(pdev));

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

	adapter->bd_number = cards_found;

	/* setup the private structure */

	if ((err = e1000_sw_init(adapter)))
		goto err_sw_init;

	if ((err = e1000_check_phy_reset_block(&adapter->hw)))
		DPRINTK(PROBE, INFO, "PHY reset is blocked due to SOL/IDER session.\n");

	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;
	}

#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_TSO_IPV6
	if (adapter->hw.mac_type > e1000_82547_rev_2)
		netdev->features |= NETIF_F_TSO_IPV6;
#endif
#endif
	if (pci_using_dac)
		netdev->features |= NETIF_F_HIGHDMA;

 	/* hard_start_xmit is safe against parallel locking */
 	netdev->features |= NETIF_F_LLTX; 
 
	adapter->en_mng_pt = e1000_enable_mng_pass_thru(&adapter->hw);

	/* 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);
	memcpy(netdev->perm_addr, adapter->hw.mac_addr, netdev->addr_len);

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

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

	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_WORK(&adapter->watchdog_task,
		(void (*)(void *))e1000_watchdog_task, 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->tx_timeout_task,
		(void (*)(void *))e1000_tx_timeout_task, netdev);

	/* we're going to reset, so assume we have no link for now */

	netif_carrier_off(netdev);
	netif_stop_queue(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_82546:
	case e1000_82546_rev_3:
	case e1000_82571:
		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->wol |= E1000_WUFC_MAG;

	/* 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");