e1000_main.c

82546千兆网卡驱动程序,支持该系列所有芯片

		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
				ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
		break;
	case e1000_82573:
		swsm = E1000_READ_REG(&adapter->hw, SWSM);
		E1000_WRITE_REG(&adapter->hw, SWSM,
				swsm & ~E1000_SWSM_DRV_LOAD);
	case e1000_ich8lan:
		extcnf = E1000_READ_REG(&adapter->hw, CTRL_EXT);
		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
				extcnf & ~E1000_CTRL_EXT_DRV_LOAD);
		break;
	default:
		break;
	}
}

/**
 * e1000_get_hw_control - get control of the h/w from f/w
 * @adapter: address of board private structure
 *
 * e1000_get_hw_control sets {CTRL_EXT|FWSM}:DRV_LOAD bit.
 * For ASF and Pass Through versions of f/w this means that
 * the driver is loaded. For AMT version (only with 82573)
 * of the f/w this means that the netowrk i/f is open.
 *
 **/

static void
e1000_get_hw_control(struct e1000_adapter *adapter)
{
	uint32_t ctrl_ext;
	uint32_t swsm;
	uint32_t extcnf;
	/* Let firmware know the driver has taken over */
	switch (adapter->hw.mac_type) {
	case e1000_82571:
	case e1000_82572:
	case e1000_80003es2lan:
		ctrl_ext = E1000_READ_REG(&adapter->hw, CTRL_EXT);
		E1000_WRITE_REG(&adapter->hw, CTRL_EXT,
				ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
		break;
	case e1000_82573:
		swsm = E1000_READ_REG(&adapter->hw, SWSM);
		E1000_WRITE_REG(&adapter->hw, SWSM,
				swsm | E1000_SWSM_DRV_LOAD);
		break;
	case e1000_ich8lan:
		extcnf = E1000_READ_REG(&adapter->hw, EXTCNF_CTRL);
		E1000_WRITE_REG(&adapter->hw, EXTCNF_CTRL,
				extcnf | E1000_EXTCNF_CTRL_SWFLAG);
		break;
	default:
		break;
	}
}

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

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

	e1000_set_multi(netdev);

#ifdef NETIF_F_HW_VLAN_TX
	e1000_restore_vlan(adapter);
#endif

	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));
	}

	adapter->tx_queue_len = netdev->tx_queue_len;

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

	clear_bit(__E1000_DOWN, &adapter->flags);

	mod_timer(&adapter->watchdog_timer, jiffies + 2 * HZ);
	return 0;
}

/**
 * e1000_power_up_phy - restore link in case the phy was powered down
 * @adapter: address of board private structure
 *
 * The phy may be powered down to save power and turn off link when the
 * driver is unloaded and wake on lan is not enabled (among others)
 * *** this routine MUST be followed by a call to e1000_reset ***
 *
 **/

void e1000_power_up_phy(struct e1000_adapter *adapter)
{
	uint16_t mii_reg = 0;

	/* Just clear the power down bit to wake the phy back up */
	if (adapter->hw.media_type == e1000_media_type_copper) {
		/* according to the manual, the phy will retain its
		 * settings across a power-down/up cycle */
		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);
	}
}

static void e1000_power_down_phy(struct e1000_adapter *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) {
		uint16_t mii_reg = 0;

		switch (adapter->hw.mac_type) {
		case e1000_82540:
		case e1000_82545:
		case e1000_82545_rev_3:
		case e1000_82546:
		case e1000_82546_rev_3:
		case e1000_82541:
		case e1000_82541_rev_2:
		case e1000_82547:
		case e1000_82547_rev_2:
			if (E1000_READ_REG(&adapter->hw, MANC) &
			    E1000_MANC_SMBUS_EN)
				goto out;
			break;
		case e1000_82571:
		case e1000_82572:
		case e1000_82573:
		case e1000_80003es2lan:
		case e1000_ich8lan:
			if (e1000_check_mng_mode(&adapter->hw) ||
			    e1000_check_phy_reset_block(&adapter->hw))
				goto out;
			break;
		default:
			goto out;
		}
		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);
	}
out:
	return;
}

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

	/* signal that we're down so the interrupt handler does not
	 * reschedule our watchdog timer */
	set_bit(__E1000_DOWN, &adapter->flags);

	e1000_irq_disable(adapter);

	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);
}

void
e1000_reinit_locked(struct e1000_adapter *adapter)
{
	WARN_ON(in_interrupt());
	while (test_and_set_bit(__E1000_RESETTING, &adapter->flags))
		msleep(1);
	e1000_down(adapter);
	e1000_up(adapter);
	clear_bit(__E1000_RESETTING, &adapter->flags);
}

void
e1000_reset(struct e1000_adapter *adapter)
{
	uint32_t pba, manc;
#ifdef DISABLE_MULR
	uint32_t tctl;
#endif
	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:
	case e1000_80003es2lan:
		pba = E1000_PBA_38K;
		break;
	case e1000_82573:
		pba = E1000_PBA_12K;
		break;
	case e1000_ich8lan:
		pba = E1000_PBA_8K;
		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;
	/* We can't use 90% on small FIFOs because the remainder
	 * would be less than 1 full frame.  In this case, we size
	 * it to allow at least a full frame above the high water
	 *  mark. */
	if (pba < E1000_PBA_16K)
		fc_high_water_mark = (pba * 1024) - 1600;

	adapter->hw.fc_high_water = fc_high_water_mark;
	adapter->hw.fc_low_water = fc_high_water_mark - 8;
	if (adapter->hw.mac_type == e1000_80003es2lan)
		adapter->hw.fc_pause_time = 0xFFFF;
	else
		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);

#ifdef DISABLE_MULR
	/* disable Multiple Reads in Transmit Control Register for debugging */
	tctl = E1000_READ_REG(hw, TCTL);
	E1000_WRITE_REG(hw, TCTL, tctl & ~E1000_TCTL_MULR);

#endif
	if (e1000_init_hw(&adapter->hw))
		DPRINTK(PROBE, ERR, "Hardware Error\n");
#ifdef NETIF_F_HW_VLAN_TX
	e1000_update_mng_vlan(adapter);
#endif
	/* 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->smart_power_down &&
	    (adapter->hw.mac_type == e1000_82571 ||
	     adapter->hw.mac_type == e1000_82572)) {
		uint16_t phy_data = 0;
		/* speed up time to link by disabling smart power down, ignore
		 * the return value of this function because there is nothing
		 * different we would do if it failed */
		e1000_read_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
		                   &phy_data);
		phy_data &= ~IGP02E1000_PM_SPD;
		e1000_write_phy_reg(&adapter->hw, IGP02E1000_PHY_POWER_MGMT,
		                    phy_data);
	}

	if ((adapter->en_mng_pt) && (adapter->hw.mac_type < e1000_82571)) {
		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;
	unsigned long flash_start, flash_len;

	static int cards_found = 0;
	static int global_quad_port_a = 0; /* global ksp3 port a indication */
	int i, err, pci_using_dac;
	uint16_t eeprom_data = 0;
	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)) &&
	    !(err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))) {
		pci_using_dac = 1;
	} else {
		if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK)) &&
		    (err = pci_set_consistent_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);
#ifdef HAVE_TX_TIMEOUT
	netdev->tx_timeout = &e1000_tx_timeout;
	netdev->watchdog_timeo = 5 * HZ;
#endif
#ifdef CONFIG_E1000_NAPI
	netdev->poll = &e1000_clean;
	netdev->weight = 64;
#endif
#ifdef NETIF_F_HW_VLAN_TX
	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;
#endif
#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;

	/* Flash BAR mapping must happen after e1000_sw_init
	 * because it depends on mac_type */
	if ((adapter->hw.mac_type == e1000_ich8lan) &&
	   (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
		flash_start = pci_resource_start(pdev, 1);
		flash_len = pci_resource_len(pdev, 1);
		adapter->hw.flash_address = ioremap(flash_start, flash_len);
		if (!adapter->hw.flash_address) {
			err = -EIO;
			goto err_flashmap;
		}
	}

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

#ifdef MAX_SKB_FRAGS
	if (adapter->hw.mac_type >= e1000_82543) {
#ifdef NETIF_F_HW_VLAN_TX