etherlabmaster: comparison devices/e1000e/lib-2.6.34-orig.c

equal deleted inserted replaced

-:78efdac9ee87
+:74dbd0b7d6aa
+/*******************************************************************************
+Intel PRO/1000 Linux driver
+Copyright(c) 1999 - 2009 Intel Corporation.
+This program is free software; you can redistribute it and/or modify it
+under the terms and conditions of the GNU General Public License,
+version 2, as published by the Free Software Foundation.
+This program is distributed in the hope 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.,
+51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+The full GNU General Public License is included in this distribution in
+the file called "COPYING".
+Contact Information:
+Linux NICS <linux.nics@intel.com>
+e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
+Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+*******************************************************************************/
+#include "e1000.h"
+enum e1000_mng_mode {
+	e1000_mng_mode_none = 0,
+	e1000_mng_mode_asf,
+	e1000_mng_mode_pt,
+	e1000_mng_mode_ipmi,
+	e1000_mng_mode_host_if_only
+};
+#define E1000_FACTPS_MNGCG		0x20000000
+/* Intel(R) Active Management Technology signature */
+#define E1000_IAMT_SIGNATURE		0x544D4149
+/**
+*  e1000e_get_bus_info_pcie - Get PCIe bus information
+*  @hw: pointer to the HW structure
+*
+*  Determines and stores the system bus information for a particular
+*  network interface.  The following bus information is determined and stored:
+*  bus speed, bus width, type (PCIe), and PCIe function.
+**/
+s32 e1000e_get_bus_info_pcie(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	struct e1000_bus_info *bus = &hw->bus;
+	struct e1000_adapter *adapter = hw->adapter;
+	u16 pcie_link_status, cap_offset;
+	cap_offset = pci_find_capability(adapter->pdev, PCI_CAP_ID_EXP);
+	if (!cap_offset) {
+		bus->width = e1000_bus_width_unknown;
+	} else {
+		pci_read_config_word(adapter->pdev,
+				     cap_offset + PCIE_LINK_STATUS,
+				     &pcie_link_status);
+		bus->width = (enum e1000_bus_width)((pcie_link_status &
+						     PCIE_LINK_WIDTH_MASK) >>
+						    PCIE_LINK_WIDTH_SHIFT);
+	}
+	mac->ops.set_lan_id(hw);
+	return 0;
+}
+/**
+*  e1000_set_lan_id_multi_port_pcie - Set LAN id for PCIe multiple port devices
+*
+*  @hw: pointer to the HW structure
+*
+*  Determines the LAN function id by reading memory-mapped registers
+*  and swaps the port value if requested.
+**/
+void e1000_set_lan_id_multi_port_pcie(struct e1000_hw *hw)
+{
+	struct e1000_bus_info *bus = &hw->bus;
+	u32 reg;
+	/*
+	 * The status register reports the correct function number
+	 * for the device regardless of function swap state.
+	 */
+	reg = er32(STATUS);
+	bus->func = (reg & E1000_STATUS_FUNC_MASK) >> E1000_STATUS_FUNC_SHIFT;
+}
+/**
+*  e1000_set_lan_id_single_port - Set LAN id for a single port device
+*  @hw: pointer to the HW structure
+*
+*  Sets the LAN function id to zero for a single port device.
+**/
+void e1000_set_lan_id_single_port(struct e1000_hw *hw)
+{
+	struct e1000_bus_info *bus = &hw->bus;
+	bus->func = 0;
+}
+/**
+*  e1000_clear_vfta_generic - Clear VLAN filter table
+*  @hw: pointer to the HW structure
+*
+*  Clears the register array which contains the VLAN filter table by
+*  setting all the values to 0.
+**/
+void e1000_clear_vfta_generic(struct e1000_hw *hw)
+{
+	u32 offset;
+	for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) {
+		E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, 0);
+		e1e_flush();
+	}
+}
+/**
+*  e1000_write_vfta_generic - Write value to VLAN filter table
+*  @hw: pointer to the HW structure
+*  @offset: register offset in VLAN filter table
+*  @value: register value written to VLAN filter table
+*
+*  Writes value at the given offset in the register array which stores
+*  the VLAN filter table.
+**/
+void e1000_write_vfta_generic(struct e1000_hw *hw, u32 offset, u32 value)
+{
+	E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, offset, value);
+	e1e_flush();
+}
+/**
+*  e1000e_init_rx_addrs - Initialize receive address's
+*  @hw: pointer to the HW structure
+*  @rar_count: receive address registers
+*
+*  Setups the receive address registers by setting the base receive address
+*  register to the devices MAC address and clearing all the other receive
+*  address registers to 0.
+**/
+void e1000e_init_rx_addrs(struct e1000_hw *hw, u16 rar_count)
+{
+	u32 i;
+	u8 mac_addr[ETH_ALEN] = {0};
+	/* Setup the receive address */
+	e_dbg("Programming MAC Address into RAR[0]\n");
+	e1000e_rar_set(hw, hw->mac.addr, 0);
+	/* Zero out the other (rar_entry_count - 1) receive addresses */
+	e_dbg("Clearing RAR[1-%u]\n", rar_count-1);
+	for (i = 1; i < rar_count; i++)
+		e1000e_rar_set(hw, mac_addr, i);
+}
+/**
+*  e1000_check_alt_mac_addr_generic - Check for alternate MAC addr
+*  @hw: pointer to the HW structure
+*
+*  Checks the nvm for an alternate MAC address.  An alternate MAC address
+*  can be setup by pre-boot software and must be treated like a permanent
+*  address and must override the actual permanent MAC address. If an
+*  alternate MAC address is found it is programmed into RAR0, replacing
+*  the permanent address that was installed into RAR0 by the Si on reset.
+*  This function will return SUCCESS unless it encounters an error while
+*  reading the EEPROM.
+**/
+s32 e1000_check_alt_mac_addr_generic(struct e1000_hw *hw)
+{
+	u32 i;
+	s32 ret_val = 0;
+	u16 offset, nvm_alt_mac_addr_offset, nvm_data;
+	u8 alt_mac_addr[ETH_ALEN];
+	ret_val = e1000_read_nvm(hw, NVM_ALT_MAC_ADDR_PTR, 1,
+	                         &nvm_alt_mac_addr_offset);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		goto out;
+	}
+	if (nvm_alt_mac_addr_offset == 0xFFFF) {
+		/* There is no Alternate MAC Address */
+		goto out;
+	}
+	if (hw->bus.func == E1000_FUNC_1)
+		nvm_alt_mac_addr_offset += E1000_ALT_MAC_ADDRESS_OFFSET_LAN1;
+	for (i = 0; i < ETH_ALEN; i += 2) {
+		offset = nvm_alt_mac_addr_offset + (i >> 1);
+		ret_val = e1000_read_nvm(hw, offset, 1, &nvm_data);
+		if (ret_val) {
+			e_dbg("NVM Read Error\n");
+			goto out;
+		}
+		alt_mac_addr[i] = (u8)(nvm_data & 0xFF);
+		alt_mac_addr[i + 1] = (u8)(nvm_data >> 8);
+	}
+	/* if multicast bit is set, the alternate address will not be used */
+	if (alt_mac_addr[0] & 0x01) {
+		e_dbg("Ignoring Alternate Mac Address with MC bit set\n");
+		goto out;
+	}
+	/*
+	 * We have a valid alternate MAC address, and we want to treat it the
+	 * same as the normal permanent MAC address stored by the HW into the
+	 * RAR. Do this by mapping this address into RAR0.
+	 */
+	e1000e_rar_set(hw, alt_mac_addr, 0);
+out:
+	return ret_val;
+}
+/**
+*  e1000e_rar_set - Set receive address register
+*  @hw: pointer to the HW structure
+*  @addr: pointer to the receive address
+*  @index: receive address array register
+*
+*  Sets the receive address array register at index to the address passed
+*  in by addr.
+**/
+void e1000e_rar_set(struct e1000_hw *hw, u8 *addr, u32 index)
+{
+	u32 rar_low, rar_high;
+	/*
+	 * HW expects these in little endian so we reverse the byte order
+	 * from network order (big endian) to little endian
+	 */
+	rar_low = ((u32) addr[0] |
+		   ((u32) addr[1] << 8) |
+		    ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
+	rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
+	/* If MAC address zero, no need to set the AV bit */
+	if (rar_low || rar_high)
+		rar_high |= E1000_RAH_AV;
+	/*
+	 * Some bridges will combine consecutive 32-bit writes into
+	 * a single burst write, which will malfunction on some parts.
+	 * The flushes avoid this.
+	 */
+	ew32(RAL(index), rar_low);
+	e1e_flush();
+	ew32(RAH(index), rar_high);
+	e1e_flush();
+}
+/**
+*  e1000_hash_mc_addr - Generate a multicast hash value
+*  @hw: pointer to the HW structure
+*  @mc_addr: pointer to a multicast address
+*
+*  Generates a multicast address hash value which is used to determine
+*  the multicast filter table array address and new table value.  See
+*  e1000_mta_set_generic()
+**/
+static u32 e1000_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr)
+{
+	u32 hash_value, hash_mask;
+	u8 bit_shift = 0;
+	/* Register count multiplied by bits per register */
+	hash_mask = (hw->mac.mta_reg_count * 32) - 1;
+	/*
+	 * For a mc_filter_type of 0, bit_shift is the number of left-shifts
+	 * where 0xFF would still fall within the hash mask.
+	 */
+	while (hash_mask >> bit_shift != 0xFF)
+		bit_shift++;
+	/*
+	 * The portion of the address that is used for the hash table
+	 * is determined by the mc_filter_type setting.
+	 * The algorithm is such that there is a total of 8 bits of shifting.
+	 * The bit_shift for a mc_filter_type of 0 represents the number of
+	 * left-shifts where the MSB of mc_addr[5] would still fall within
+	 * the hash_mask.  Case 0 does this exactly.  Since there are a total
+	 * of 8 bits of shifting, then mc_addr[4] will shift right the
+	 * remaining number of bits. Thus 8 - bit_shift.  The rest of the
+	 * cases are a variation of this algorithm...essentially raising the
+	 * number of bits to shift mc_addr[5] left, while still keeping the
+	 * 8-bit shifting total.
+	 *
+	 * For example, given the following Destination MAC Address and an
+	 * mta register count of 128 (thus a 4096-bit vector and 0xFFF mask),
+	 * we can see that the bit_shift for case 0 is 4.  These are the hash
+	 * values resulting from each mc_filter_type...
+	 * [0] [1] [2] [3] [4] [5]
+	 * 01  AA  00  12  34  56
+	 * LSB		 MSB
+	 *
+	 * case 0: hash_value = ((0x34 >> 4) | (0x56 << 4)) & 0xFFF = 0x563
+	 * case 1: hash_value = ((0x34 >> 3) | (0x56 << 5)) & 0xFFF = 0xAC6
+	 * case 2: hash_value = ((0x34 >> 2) | (0x56 << 6)) & 0xFFF = 0x163
+	 * case 3: hash_value = ((0x34 >> 0) | (0x56 << 8)) & 0xFFF = 0x634
+	 */
+	switch (hw->mac.mc_filter_type) {
+	default:
+	case 0:
+		break;
+	case 1:
+		bit_shift += 1;
+		break;
+	case 2:
+		bit_shift += 2;
+		break;
+	case 3:
+		bit_shift += 4;
+		break;
+	}
+	hash_value = hash_mask & (((mc_addr[4] >> (8 - bit_shift)) |
+				  (((u16) mc_addr[5]) << bit_shift)));
+	return hash_value;
+}
+/**
+*  e1000e_update_mc_addr_list_generic - Update Multicast addresses
+*  @hw: pointer to the HW structure
+*  @mc_addr_list: array of multicast addresses to program
+*  @mc_addr_count: number of multicast addresses to program
+*
+*  Updates entire Multicast Table Array.
+*  The caller must have a packed mc_addr_list of multicast addresses.
+**/
+void e1000e_update_mc_addr_list_generic(struct e1000_hw *hw,
+					u8 *mc_addr_list, u32 mc_addr_count)
+{
+	u32 hash_value, hash_bit, hash_reg;
+	int i;
+	/* clear mta_shadow */
+	memset(&hw->mac.mta_shadow, 0, sizeof(hw->mac.mta_shadow));
+	/* update mta_shadow from mc_addr_list */
+	for (i = 0; (u32) i < mc_addr_count; i++) {
+		hash_value = e1000_hash_mc_addr(hw, mc_addr_list);
+		hash_reg = (hash_value >> 5) & (hw->mac.mta_reg_count - 1);
+		hash_bit = hash_value & 0x1F;
+		hw->mac.mta_shadow[hash_reg] |= (1 << hash_bit);
+		mc_addr_list += (ETH_ALEN);
+	}
+	/* replace the entire MTA table */
+	for (i = hw->mac.mta_reg_count - 1; i >= 0; i--)
+		E1000_WRITE_REG_ARRAY(hw, E1000_MTA, i, hw->mac.mta_shadow[i]);
+	e1e_flush();
+}
+/**
+*  e1000e_clear_hw_cntrs_base - Clear base hardware counters
+*  @hw: pointer to the HW structure
+*
+*  Clears the base hardware counters by reading the counter registers.
+**/
+void e1000e_clear_hw_cntrs_base(struct e1000_hw *hw)
+{
+	er32(CRCERRS);
+	er32(SYMERRS);
+	er32(MPC);
+	er32(SCC);
+	er32(ECOL);
+	er32(MCC);
+	er32(LATECOL);
+	er32(COLC);
+	er32(DC);
+	er32(SEC);
+	er32(RLEC);
+	er32(XONRXC);
+	er32(XONTXC);
+	er32(XOFFRXC);
+	er32(XOFFTXC);
+	er32(FCRUC);
+	er32(GPRC);
+	er32(BPRC);
+	er32(MPRC);
+	er32(GPTC);
+	er32(GORCL);
+	er32(GORCH);
+	er32(GOTCL);
+	er32(GOTCH);
+	er32(RNBC);
+	er32(RUC);
+	er32(RFC);
+	er32(ROC);
+	er32(RJC);
+	er32(TORL);
+	er32(TORH);
+	er32(TOTL);
+	er32(TOTH);
+	er32(TPR);
+	er32(TPT);
+	er32(MPTC);
+	er32(BPTC);
+}
+/**
+*  e1000e_check_for_copper_link - Check for link (Copper)
+*  @hw: pointer to the HW structure
+*
+*  Checks to see of the link status of the hardware has changed.  If a
+*  change in link status has been detected, then we read the PHY registers
+*  to get the current speed/duplex if link exists.
+**/
+s32 e1000e_check_for_copper_link(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	s32 ret_val;
+	bool link;
+	/*
+	 * We only want to go out to the PHY registers to see if Auto-Neg
+	 * has completed and/or if our link status has changed.  The
+	 * get_link_status flag is set upon receiving a Link Status
+	 * Change or Rx Sequence Error interrupt.
+	 */
+	if (!mac->get_link_status)
+		return 0;
+	/*
+	 * First we want to see if the MII Status Register reports
+	 * link.  If so, then we want to get the current speed/duplex
+	 * of the PHY.
+	 */
+	ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
+	if (ret_val)
+		return ret_val;
+	if (!link)
+		return ret_val; /* No link detected */
+	mac->get_link_status = false;
+	/*
+	 * Check if there was DownShift, must be checked
+	 * immediately after link-up
+	 */
+	e1000e_check_downshift(hw);
+	/*
+	 * If we are forcing speed/duplex, then we simply return since
+	 * we have already determined whether we have link or not.
+	 */
+	if (!mac->autoneg) {
+		ret_val = -E1000_ERR_CONFIG;
+		return ret_val;
+	}
+	/*
+	 * Auto-Neg is enabled.  Auto Speed Detection takes care
+	 * of MAC speed/duplex configuration.  So we only need to
+	 * configure Collision Distance in the MAC.
+	 */
+	e1000e_config_collision_dist(hw);
+	/*
+	 * Configure Flow Control now that Auto-Neg has completed.
+	 * First, we need to restore the desired flow control
+	 * settings because we may have had to re-autoneg with a
+	 * different link partner.
+	 */
+	ret_val = e1000e_config_fc_after_link_up(hw);
+	if (ret_val) {
+		e_dbg("Error configuring flow control\n");
+	}
+	return ret_val;
+}
+/**
+*  e1000e_check_for_fiber_link - Check for link (Fiber)
+*  @hw: pointer to the HW structure
+*
+*  Checks for link up on the hardware.  If link is not up and we have
+*  a signal, then we need to force link up.
+**/
+s32 e1000e_check_for_fiber_link(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	u32 rxcw;
+	u32 ctrl;
+	u32 status;
+	s32 ret_val;
+	ctrl = er32(CTRL);
+	status = er32(STATUS);
+	rxcw = er32(RXCW);
+	/*
+	 * If we don't have link (auto-negotiation failed or link partner
+	 * cannot auto-negotiate), the cable is plugged in (we have signal),
+	 * and our link partner is not trying to auto-negotiate with us (we
+	 * are receiving idles or data), we need to force link up. We also
+	 * need to give auto-negotiation time to complete, in case the cable
+	 * was just plugged in. The autoneg_failed flag does this.
+	 */
+	/* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
+	if ((ctrl & E1000_CTRL_SWDPIN1) && (!(status & E1000_STATUS_LU)) &&
+	    (!(rxcw & E1000_RXCW_C))) {
+		if (mac->autoneg_failed == 0) {
+			mac->autoneg_failed = 1;
+			return 0;
+		}
+		e_dbg("NOT RXing /C/, disable AutoNeg and force link.\n");
+		/* Disable auto-negotiation in the TXCW register */
+		ew32(TXCW, (mac->txcw & ~E1000_TXCW_ANE));
+		/* Force link-up and also force full-duplex. */
+		ctrl = er32(CTRL);
+		ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
+		ew32(CTRL, ctrl);
+		/* Configure Flow Control after forcing link up. */
+		ret_val = e1000e_config_fc_after_link_up(hw);
+		if (ret_val) {
+			e_dbg("Error configuring flow control\n");
+			return ret_val;
+		}
+	} else if ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) {
+		/*
+		 * If we are forcing link and we are receiving /C/ ordered
+		 * sets, re-enable auto-negotiation in the TXCW register
+		 * and disable forced link in the Device Control register
+		 * in an attempt to auto-negotiate with our link partner.
+		 */
+		e_dbg("RXing /C/, enable AutoNeg and stop forcing link.\n");
+		ew32(TXCW, mac->txcw);
+		ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
+		mac->serdes_has_link = true;
+	}
+	return 0;
+}
+/**
+*  e1000e_check_for_serdes_link - Check for link (Serdes)
+*  @hw: pointer to the HW structure
+*
+*  Checks for link up on the hardware.  If link is not up and we have
+*  a signal, then we need to force link up.
+**/
+s32 e1000e_check_for_serdes_link(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	u32 rxcw;
+	u32 ctrl;
+	u32 status;
+	s32 ret_val;
+	ctrl = er32(CTRL);
+	status = er32(STATUS);
+	rxcw = er32(RXCW);
+	/*
+	 * If we don't have link (auto-negotiation failed or link partner
+	 * cannot auto-negotiate), and our link partner is not trying to
+	 * auto-negotiate with us (we are receiving idles or data),
+	 * we need to force link up. We also need to give auto-negotiation
+	 * time to complete.
+	 */
+	/* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */
+	if ((!(status & E1000_STATUS_LU)) && (!(rxcw & E1000_RXCW_C))) {
+		if (mac->autoneg_failed == 0) {
+			mac->autoneg_failed = 1;
+			return 0;
+		}
+		e_dbg("NOT RXing /C/, disable AutoNeg and force link.\n");
+		/* Disable auto-negotiation in the TXCW register */
+		ew32(TXCW, (mac->txcw & ~E1000_TXCW_ANE));
+		/* Force link-up and also force full-duplex. */
+		ctrl = er32(CTRL);
+		ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD);
+		ew32(CTRL, ctrl);
+		/* Configure Flow Control after forcing link up. */
+		ret_val = e1000e_config_fc_after_link_up(hw);
+		if (ret_val) {
+			e_dbg("Error configuring flow control\n");
+			return ret_val;
+		}
+	} else if ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) {
+		/*
+		 * If we are forcing link and we are receiving /C/ ordered
+		 * sets, re-enable auto-negotiation in the TXCW register
+		 * and disable forced link in the Device Control register
+		 * in an attempt to auto-negotiate with our link partner.
+		 */
+		e_dbg("RXing /C/, enable AutoNeg and stop forcing link.\n");
+		ew32(TXCW, mac->txcw);
+		ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
+		mac->serdes_has_link = true;
+	} else if (!(E1000_TXCW_ANE & er32(TXCW))) {
+		/*
+		 * If we force link for non-auto-negotiation switch, check
+		 * link status based on MAC synchronization for internal
+		 * serdes media type.
+		 */
+		/* SYNCH bit and IV bit are sticky. */
+		udelay(10);
+		rxcw = er32(RXCW);
+		if (rxcw & E1000_RXCW_SYNCH) {
+			if (!(rxcw & E1000_RXCW_IV)) {
+				mac->serdes_has_link = true;
+				e_dbg("SERDES: Link up - forced.\n");
+			}
+		} else {
+			mac->serdes_has_link = false;
+			e_dbg("SERDES: Link down - force failed.\n");
+		}
+	}
+	if (E1000_TXCW_ANE & er32(TXCW)) {
+		status = er32(STATUS);
+		if (status & E1000_STATUS_LU) {
+			/* SYNCH bit and IV bit are sticky, so reread rxcw.  */
+			udelay(10);
+			rxcw = er32(RXCW);
+			if (rxcw & E1000_RXCW_SYNCH) {
+				if (!(rxcw & E1000_RXCW_IV)) {
+					mac->serdes_has_link = true;
+					e_dbg("SERDES: Link up - autoneg "
+					   "completed successfully.\n");
+				} else {
+					mac->serdes_has_link = false;
+					e_dbg("SERDES: Link down - invalid"
+					   "codewords detected in autoneg.\n");
+				}
+			} else {
+				mac->serdes_has_link = false;
+				e_dbg("SERDES: Link down - no sync.\n");
+			}
+		} else {
+			mac->serdes_has_link = false;
+			e_dbg("SERDES: Link down - autoneg failed\n");
+		}
+	}
+	return 0;
+}
+/**
+*  e1000_set_default_fc_generic - Set flow control default values
+*  @hw: pointer to the HW structure
+*
+*  Read the EEPROM for the default values for flow control and store the
+*  values.
+**/
+static s32 e1000_set_default_fc_generic(struct e1000_hw *hw)
+{
+	s32 ret_val;
+	u16 nvm_data;
+	/*
+	 * Read and store word 0x0F of the EEPROM. This word contains bits
+	 * that determine the hardware's default PAUSE (flow control) mode,
+	 * a bit that determines whether the HW defaults to enabling or
+	 * disabling auto-negotiation, and the direction of the
+	 * SW defined pins. If there is no SW over-ride of the flow
+	 * control setting, then the variable hw->fc will
+	 * be initialized based on a value in the EEPROM.
+	 */
+	ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &nvm_data);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		return ret_val;
+	}
+	if ((nvm_data & NVM_WORD0F_PAUSE_MASK) == 0)
+		hw->fc.requested_mode = e1000_fc_none;
+	else if ((nvm_data & NVM_WORD0F_PAUSE_MASK) ==
+		 NVM_WORD0F_ASM_DIR)
+		hw->fc.requested_mode = e1000_fc_tx_pause;
+	else
+		hw->fc.requested_mode = e1000_fc_full;
+	return 0;
+}
+/**
+*  e1000e_setup_link - Setup flow control and link settings
+*  @hw: pointer to the HW structure
+*
+*  Determines which flow control settings to use, then configures flow
+*  control.  Calls the appropriate media-specific link configuration
+*  function.  Assuming the adapter has a valid link partner, a valid link
+*  should be established.  Assumes the hardware has previously been reset
+*  and the transmitter and receiver are not enabled.
+**/
+s32 e1000e_setup_link(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	s32 ret_val;
+	/*
+	 * In the case of the phy reset being blocked, we already have a link.
+	 * We do not need to set it up again.
+	 */
+	if (e1000_check_reset_block(hw))
+		return 0;
+	/*
+	 * If requested flow control is set to default, set flow control
+	 * based on the EEPROM flow control settings.
+	 */
+	if (hw->fc.requested_mode == e1000_fc_default) {
+		ret_val = e1000_set_default_fc_generic(hw);
+		if (ret_val)
+			return ret_val;
+	}
+	/*
+	 * Save off the requested flow control mode for use later.  Depending
+	 * on the link partner's capabilities, we may or may not use this mode.
+	 */
+	hw->fc.current_mode = hw->fc.requested_mode;
+	e_dbg("After fix-ups FlowControl is now = %x\n",
+		hw->fc.current_mode);
+	/* Call the necessary media_type subroutine to configure the link. */
+	ret_val = mac->ops.setup_physical_interface(hw);
+	if (ret_val)
+		return ret_val;
+	/*
+	 * Initialize the flow control address, type, and PAUSE timer
+	 * registers to their default values.  This is done even if flow
+	 * control is disabled, because it does not hurt anything to
+	 * initialize these registers.
+	 */
+	e_dbg("Initializing the Flow Control address, type and timer regs\n");
+	ew32(FCT, FLOW_CONTROL_TYPE);
+	ew32(FCAH, FLOW_CONTROL_ADDRESS_HIGH);
+	ew32(FCAL, FLOW_CONTROL_ADDRESS_LOW);
+	ew32(FCTTV, hw->fc.pause_time);
+	return e1000e_set_fc_watermarks(hw);
+}
+/**
+*  e1000_commit_fc_settings_generic - Configure flow control
+*  @hw: pointer to the HW structure
+*
+*  Write the flow control settings to the Transmit Config Word Register (TXCW)
+*  base on the flow control settings in e1000_mac_info.
+**/
+static s32 e1000_commit_fc_settings_generic(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	u32 txcw;
+	/*
+	 * Check for a software override of the flow control settings, and
+	 * setup the device accordingly.  If auto-negotiation is enabled, then
+	 * software will have to set the "PAUSE" bits to the correct value in
+	 * the Transmit Config Word Register (TXCW) and re-start auto-
+	 * negotiation.  However, if auto-negotiation is disabled, then
+	 * software will have to manually configure the two flow control enable
+	 * bits in the CTRL register.
+	 *
+	 * The possible values of the "fc" parameter are:
+	 *      0:  Flow control is completely disabled
+	 *      1:  Rx flow control is enabled (we can receive pause frames,
+	 *	  but not send pause frames).
+	 *      2:  Tx flow control is enabled (we can send pause frames but we
+	 *	  do not support receiving pause frames).
+	 *      3:  Both Rx and Tx flow control (symmetric) are enabled.
+	 */
+	switch (hw->fc.current_mode) {
+	case e1000_fc_none:
+		/* Flow control completely disabled by a software over-ride. */
+		txcw = (E1000_TXCW_ANE | E1000_TXCW_FD);
+		break;
+	case e1000_fc_rx_pause:
+		/*
+		 * Rx Flow control is enabled and Tx Flow control is disabled
+		 * by a software over-ride. Since there really isn't a way to
+		 * advertise that we are capable of Rx Pause ONLY, we will
+		 * advertise that we support both symmetric and asymmetric Rx
+		 * PAUSE.  Later, we will disable the adapter's ability to send
+		 * PAUSE frames.
+		 */
+		txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK);
+		break;
+	case e1000_fc_tx_pause:
+		/*
+		 * Tx Flow control is enabled, and Rx Flow control is disabled,
+		 * by a software over-ride.
+		 */
+		txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_ASM_DIR);
+		break;
+	case e1000_fc_full:
+		/*
+		 * Flow control (both Rx and Tx) is enabled by a software
+		 * over-ride.
+		 */
+		txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK);
+		break;
+	default:
+		e_dbg("Flow control param set incorrectly\n");
+		return -E1000_ERR_CONFIG;
+		break;
+	}
+	ew32(TXCW, txcw);
+	mac->txcw = txcw;
+	return 0;
+}
+/**
+*  e1000_poll_fiber_serdes_link_generic - Poll for link up
+*  @hw: pointer to the HW structure
+*
+*  Polls for link up by reading the status register, if link fails to come
+*  up with auto-negotiation, then the link is forced if a signal is detected.
+**/
+static s32 e1000_poll_fiber_serdes_link_generic(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	u32 i, status;
+	s32 ret_val;
+	/*
+	 * If we have a signal (the cable is plugged in, or assumed true for
+	 * serdes media) then poll for a "Link-Up" indication in the Device
+	 * Status Register.  Time-out if a link isn't seen in 500 milliseconds
+	 * seconds (Auto-negotiation should complete in less than 500
+	 * milliseconds even if the other end is doing it in SW).
+	 */
+	for (i = 0; i < FIBER_LINK_UP_LIMIT; i++) {
+		msleep(10);
+		status = er32(STATUS);
+		if (status & E1000_STATUS_LU)
+			break;
+	}
+	if (i == FIBER_LINK_UP_LIMIT) {
+		e_dbg("Never got a valid link from auto-neg!!!\n");
+		mac->autoneg_failed = 1;
+		/*
+		 * AutoNeg failed to achieve a link, so we'll call
+		 * mac->check_for_link. This routine will force the
+		 * link up if we detect a signal. This will allow us to
+		 * communicate with non-autonegotiating link partners.
+		 */
+		ret_val = mac->ops.check_for_link(hw);
+		if (ret_val) {
+			e_dbg("Error while checking for link\n");
+			return ret_val;
+		}
+		mac->autoneg_failed = 0;
+	} else {
+		mac->autoneg_failed = 0;
+		e_dbg("Valid Link Found\n");
+	}
+	return 0;
+}
+/**
+*  e1000e_setup_fiber_serdes_link - Setup link for fiber/serdes
+*  @hw: pointer to the HW structure
+*
+*  Configures collision distance and flow control for fiber and serdes
+*  links.  Upon successful setup, poll for link.
+**/
+s32 e1000e_setup_fiber_serdes_link(struct e1000_hw *hw)
+{
+	u32 ctrl;
+	s32 ret_val;
+	ctrl = er32(CTRL);
+	/* Take the link out of reset */
+	ctrl &= ~E1000_CTRL_LRST;
+	e1000e_config_collision_dist(hw);
+	ret_val = e1000_commit_fc_settings_generic(hw);
+	if (ret_val)
+		return ret_val;
+	/*
+	 * Since auto-negotiation is enabled, take the link out of reset (the
+	 * link will be in reset, because we previously reset the chip). This
+	 * will restart auto-negotiation.  If auto-negotiation is successful
+	 * then the link-up status bit will be set and the flow control enable
+	 * bits (RFCE and TFCE) will be set according to their negotiated value.
+	 */
+	e_dbg("Auto-negotiation enabled\n");
+	ew32(CTRL, ctrl);
+	e1e_flush();
+	msleep(1);
+	/*
+	 * For these adapters, the SW definable pin 1 is set when the optics
+	 * detect a signal.  If we have a signal, then poll for a "Link-Up"
+	 * indication.
+	 */
+	if (hw->phy.media_type == e1000_media_type_internal_serdes ||
+	    (er32(CTRL) & E1000_CTRL_SWDPIN1)) {
+		ret_val = e1000_poll_fiber_serdes_link_generic(hw);
+	} else {
+		e_dbg("No signal detected\n");
+	}
+	return 0;
+}
+/**
+*  e1000e_config_collision_dist - Configure collision distance
+*  @hw: pointer to the HW structure
+*
+*  Configures the collision distance to the default value and is used
+*  during link setup. Currently no func pointer exists and all
+*  implementations are handled in the generic version of this function.
+**/
+void e1000e_config_collision_dist(struct e1000_hw *hw)
+{
+	u32 tctl;
+	tctl = er32(TCTL);
+	tctl &= ~E1000_TCTL_COLD;
+	tctl |= E1000_COLLISION_DISTANCE << E1000_COLD_SHIFT;
+	ew32(TCTL, tctl);
+	e1e_flush();
+}
+/**
+*  e1000e_set_fc_watermarks - Set flow control high/low watermarks
+*  @hw: pointer to the HW structure
+*
+*  Sets the flow control high/low threshold (watermark) registers.  If
+*  flow control XON frame transmission is enabled, then set XON frame
+*  transmission as well.
+**/
+s32 e1000e_set_fc_watermarks(struct e1000_hw *hw)
+{
+	u32 fcrtl = 0, fcrth = 0;
+	/*
+	 * Set the flow control receive threshold registers.  Normally,
+	 * these registers will be set to a default threshold that may be
+	 * adjusted later by the driver's runtime code.  However, if the
+	 * ability to transmit pause frames is not enabled, then these
+	 * registers will be set to 0.
+	 */
+	if (hw->fc.current_mode & e1000_fc_tx_pause) {
+		/*
+		 * We need to set up the Receive Threshold high and low water
+		 * marks as well as (optionally) enabling the transmission of
+		 * XON frames.
+		 */
+		fcrtl = hw->fc.low_water;
+		fcrtl |= E1000_FCRTL_XONE;
+		fcrth = hw->fc.high_water;
+	}
+	ew32(FCRTL, fcrtl);
+	ew32(FCRTH, fcrth);
+	return 0;
+}
+/**
+*  e1000e_force_mac_fc - Force the MAC's flow control settings
+*  @hw: pointer to the HW structure
+*
+*  Force the MAC's flow control settings.  Sets the TFCE and RFCE bits in the
+*  device control register to reflect the adapter settings.  TFCE and RFCE
+*  need to be explicitly set by software when a copper PHY is used because
+*  autonegotiation is managed by the PHY rather than the MAC.  Software must
+*  also configure these bits when link is forced on a fiber connection.
+**/
+s32 e1000e_force_mac_fc(struct e1000_hw *hw)
+{
+	u32 ctrl;
+	ctrl = er32(CTRL);
+	/*
+	 * Because we didn't get link via the internal auto-negotiation
+	 * mechanism (we either forced link or we got link via PHY
+	 * auto-neg), we have to manually enable/disable transmit an
+	 * receive flow control.
+	 *
+	 * The "Case" statement below enables/disable flow control
+	 * according to the "hw->fc.current_mode" parameter.
+	 *
+	 * The possible values of the "fc" parameter are:
+	 *      0:  Flow control is completely disabled
+	 *      1:  Rx flow control is enabled (we can receive pause
+	 *	  frames but not send pause frames).
+	 *      2:  Tx flow control is enabled (we can send pause frames
+	 *	  frames but we do not receive pause frames).
+	 *      3:  Both Rx and Tx flow control (symmetric) is enabled.
+	 *  other:  No other values should be possible at this point.
+	 */
+	e_dbg("hw->fc.current_mode = %u\n", hw->fc.current_mode);
+	switch (hw->fc.current_mode) {
+	case e1000_fc_none:
+		ctrl &= (~(E1000_CTRL_TFCE | E1000_CTRL_RFCE));
+		break;
+	case e1000_fc_rx_pause:
+		ctrl &= (~E1000_CTRL_TFCE);
+		ctrl |= E1000_CTRL_RFCE;
+		break;
+	case e1000_fc_tx_pause:
+		ctrl &= (~E1000_CTRL_RFCE);
+		ctrl |= E1000_CTRL_TFCE;
+		break;
+	case e1000_fc_full:
+		ctrl |= (E1000_CTRL_TFCE | E1000_CTRL_RFCE);
+		break;
+	default:
+		e_dbg("Flow control param set incorrectly\n");
+		return -E1000_ERR_CONFIG;
+	}
+	ew32(CTRL, ctrl);
+	return 0;
+}
+/**
+*  e1000e_config_fc_after_link_up - Configures flow control after link
+*  @hw: pointer to the HW structure
+*
+*  Checks the status of auto-negotiation after link up to ensure that the
+*  speed and duplex were not forced.  If the link needed to be forced, then
+*  flow control needs to be forced also.  If auto-negotiation is enabled
+*  and did not fail, then we configure flow control based on our link
+*  partner.
+**/
+s32 e1000e_config_fc_after_link_up(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	s32 ret_val = 0;
+	u16 mii_status_reg, mii_nway_adv_reg, mii_nway_lp_ability_reg;
+	u16 speed, duplex;
+	/*
+	 * Check for the case where we have fiber media and auto-neg failed
+	 * so we had to force link.  In this case, we need to force the
+	 * configuration of the MAC to match the "fc" parameter.
+	 */
+	if (mac->autoneg_failed) {
+		if (hw->phy.media_type == e1000_media_type_fiber ||
+		    hw->phy.media_type == e1000_media_type_internal_serdes)
+			ret_val = e1000e_force_mac_fc(hw);
+	} else {
+		if (hw->phy.media_type == e1000_media_type_copper)
+			ret_val = e1000e_force_mac_fc(hw);
+	}
+	if (ret_val) {
+		e_dbg("Error forcing flow control settings\n");
+		return ret_val;
+	}
+	/*
+	 * Check for the case where we have copper media and auto-neg is
+	 * enabled.  In this case, we need to check and see if Auto-Neg
+	 * has completed, and if so, how the PHY and link partner has
+	 * flow control configured.
+	 */
+	if ((hw->phy.media_type == e1000_media_type_copper) && mac->autoneg) {
+		/*
+		 * Read the MII Status Register and check to see if AutoNeg
+		 * has completed.  We read this twice because this reg has
+		 * some "sticky" (latched) bits.
+		 */
+		ret_val = e1e_rphy(hw, PHY_STATUS, &mii_status_reg);
+		if (ret_val)
+			return ret_val;
+		ret_val = e1e_rphy(hw, PHY_STATUS, &mii_status_reg);
+		if (ret_val)
+			return ret_val;
+		if (!(mii_status_reg & MII_SR_AUTONEG_COMPLETE)) {
+			e_dbg("Copper PHY and Auto Neg "
+				 "has not completed.\n");
+			return ret_val;
+		}
+		/*
+		 * The AutoNeg process has completed, so we now need to
+		 * read both the Auto Negotiation Advertisement
+		 * Register (Address 4) and the Auto_Negotiation Base
+		 * Page Ability Register (Address 5) to determine how
+		 * flow control was negotiated.
+		 */
+		ret_val = e1e_rphy(hw, PHY_AUTONEG_ADV, &mii_nway_adv_reg);
+		if (ret_val)
+			return ret_val;
+		ret_val = e1e_rphy(hw, PHY_LP_ABILITY, &mii_nway_lp_ability_reg);
+		if (ret_val)
+			return ret_val;
+		/*
+		 * Two bits in the Auto Negotiation Advertisement Register
+		 * (Address 4) and two bits in the Auto Negotiation Base
+		 * Page Ability Register (Address 5) determine flow control
+		 * for both the PHY and the link partner.  The following
+		 * table, taken out of the IEEE 802.3ab/D6.0 dated March 25,
+		 * 1999, describes these PAUSE resolution bits and how flow
+		 * control is determined based upon these settings.
+		 * NOTE:  DC = Don't Care
+		 *
+		 *   LOCAL DEVICE  |   LINK PARTNER
+		 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution
+		 *-------|---------|-------|---------|--------------------
+		 *   0   |    0    |  DC   |   DC    | e1000_fc_none
+		 *   0   |    1    |   0   |   DC    | e1000_fc_none
+		 *   0   |    1    |   1   |    0    | e1000_fc_none
+		 *   0   |    1    |   1   |    1    | e1000_fc_tx_pause
+		 *   1   |    0    |   0   |   DC    | e1000_fc_none
+		 *   1   |   DC    |   1   |   DC    | e1000_fc_full
+		 *   1   |    1    |   0   |    0    | e1000_fc_none
+		 *   1   |    1    |   0   |    1    | e1000_fc_rx_pause
+		 *
+		 * Are both PAUSE bits set to 1?  If so, this implies
+		 * Symmetric Flow Control is enabled at both ends.  The
+		 * ASM_DIR bits are irrelevant per the spec.
+		 *
+		 * For Symmetric Flow Control:
+		 *
+		 *   LOCAL DEVICE  |   LINK PARTNER
+		 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
+		 *-------|---------|-------|---------|--------------------
+		 *   1   |   DC    |   1   |   DC    | E1000_fc_full
+		 *
+		 */
+		if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
+		    (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) {
+			/*
+			 * Now we need to check if the user selected Rx ONLY
+			 * of pause frames.  In this case, we had to advertise
+			 * FULL flow control because we could not advertise Rx
+			 * ONLY. Hence, we must now check to see if we need to
+			 * turn OFF  the TRANSMISSION of PAUSE frames.
+			 */
+			if (hw->fc.requested_mode == e1000_fc_full) {
+				hw->fc.current_mode = e1000_fc_full;
+				e_dbg("Flow Control = FULL.\r\n");
+			} else {
+				hw->fc.current_mode = e1000_fc_rx_pause;
+				e_dbg("Flow Control = "
+					 "RX PAUSE frames only.\r\n");
+			}
+		}
+		/*
+		 * For receiving PAUSE frames ONLY.
+		 *
+		 *   LOCAL DEVICE  |   LINK PARTNER
+		 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
+		 *-------|---------|-------|---------|--------------------
+		 *   0   |    1    |   1   |    1    | e1000_fc_tx_pause
+		 */
+		else if (!(mii_nway_adv_reg & NWAY_AR_PAUSE) &&
+			  (mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
+			  (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
+			  (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
+			hw->fc.current_mode = e1000_fc_tx_pause;
+			e_dbg("Flow Control = Tx PAUSE frames only.\r\n");
+		}
+		/*
+		 * For transmitting PAUSE frames ONLY.
+		 *
+		 *   LOCAL DEVICE  |   LINK PARTNER
+		 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result
+		 *-------|---------|-------|---------|--------------------
+		 *   1   |    1    |   0   |    1    | e1000_fc_rx_pause
+		 */
+		else if ((mii_nway_adv_reg & NWAY_AR_PAUSE) &&
+			 (mii_nway_adv_reg & NWAY_AR_ASM_DIR) &&
+			 !(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) &&
+			 (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) {
+			hw->fc.current_mode = e1000_fc_rx_pause;
+			e_dbg("Flow Control = Rx PAUSE frames only.\r\n");
+		} else {
+			/*
+			 * Per the IEEE spec, at this point flow control
+			 * should be disabled.
+			 */
+			hw->fc.current_mode = e1000_fc_none;
+			e_dbg("Flow Control = NONE.\r\n");
+		}
+		/*
+		 * Now we need to do one last check...  If we auto-
+		 * negotiated to HALF DUPLEX, flow control should not be
+		 * enabled per IEEE 802.3 spec.
+		 */
+		ret_val = mac->ops.get_link_up_info(hw, &speed, &duplex);
+		if (ret_val) {
+			e_dbg("Error getting link speed and duplex\n");
+			return ret_val;
+		}
+		if (duplex == HALF_DUPLEX)
+			hw->fc.current_mode = e1000_fc_none;
+		/*
+		 * Now we call a subroutine to actually force the MAC
+		 * controller to use the correct flow control settings.
+		 */
+		ret_val = e1000e_force_mac_fc(hw);
+		if (ret_val) {
+			e_dbg("Error forcing flow control settings\n");
+			return ret_val;
+		}
+	}
+	return 0;
+}
+/**
+*  e1000e_get_speed_and_duplex_copper - Retrieve current speed/duplex
+*  @hw: pointer to the HW structure
+*  @speed: stores the current speed
+*  @duplex: stores the current duplex
+*
+*  Read the status register for the current speed/duplex and store the current
+*  speed and duplex for copper connections.
+**/
+s32 e1000e_get_speed_and_duplex_copper(struct e1000_hw *hw, u16 *speed, u16 *duplex)
+{
+	u32 status;
+	status = er32(STATUS);
+	if (status & E1000_STATUS_SPEED_1000) {
+		*speed = SPEED_1000;
+		e_dbg("1000 Mbs, ");
+	} else if (status & E1000_STATUS_SPEED_100) {
+		*speed = SPEED_100;
+		e_dbg("100 Mbs, ");
+	} else {
+		*speed = SPEED_10;
+		e_dbg("10 Mbs, ");
+	}
+	if (status & E1000_STATUS_FD) {
+		*duplex = FULL_DUPLEX;
+		e_dbg("Full Duplex\n");
+	} else {
+		*duplex = HALF_DUPLEX;
+		e_dbg("Half Duplex\n");
+	}
+	return 0;
+}
+/**
+*  e1000e_get_speed_and_duplex_fiber_serdes - Retrieve current speed/duplex
+*  @hw: pointer to the HW structure
+*  @speed: stores the current speed
+*  @duplex: stores the current duplex
+*
+*  Sets the speed and duplex to gigabit full duplex (the only possible option)
+*  for fiber/serdes links.
+**/
+s32 e1000e_get_speed_and_duplex_fiber_serdes(struct e1000_hw *hw, u16 *speed, u16 *duplex)
+{
+	*speed = SPEED_1000;
+	*duplex = FULL_DUPLEX;
+	return 0;
+}
+/**
+*  e1000e_get_hw_semaphore - Acquire hardware semaphore
+*  @hw: pointer to the HW structure
+*
+*  Acquire the HW semaphore to access the PHY or NVM
+**/
+s32 e1000e_get_hw_semaphore(struct e1000_hw *hw)
+{
+	u32 swsm;
+	s32 timeout = hw->nvm.word_size + 1;
+	s32 i = 0;
+	/* Get the SW semaphore */
+	while (i < timeout) {
+		swsm = er32(SWSM);
+		if (!(swsm & E1000_SWSM_SMBI))
+			break;
+		udelay(50);
+		i++;
+	}
+	if (i == timeout) {
+		e_dbg("Driver can't access device - SMBI bit is set.\n");
+		return -E1000_ERR_NVM;
+	}
+	/* Get the FW semaphore. */
+	for (i = 0; i < timeout; i++) {
+		swsm = er32(SWSM);
+		ew32(SWSM, swsm | E1000_SWSM_SWESMBI);
+		/* Semaphore acquired if bit latched */
+		if (er32(SWSM) & E1000_SWSM_SWESMBI)
+			break;
+		udelay(50);
+	}
+	if (i == timeout) {
+		/* Release semaphores */
+		e1000e_put_hw_semaphore(hw);
+		e_dbg("Driver can't access the NVM\n");
+		return -E1000_ERR_NVM;
+	}
+	return 0;
+}
+/**
+*  e1000e_put_hw_semaphore - Release hardware semaphore
+*  @hw: pointer to the HW structure
+*
+*  Release hardware semaphore used to access the PHY or NVM
+**/
+void e1000e_put_hw_semaphore(struct e1000_hw *hw)
+{
+	u32 swsm;
+	swsm = er32(SWSM);
+	swsm &= ~(E1000_SWSM_SMBI | E1000_SWSM_SWESMBI);
+	ew32(SWSM, swsm);
+}
+/**
+*  e1000e_get_auto_rd_done - Check for auto read completion
+*  @hw: pointer to the HW structure
+*
+*  Check EEPROM for Auto Read done bit.
+**/
+s32 e1000e_get_auto_rd_done(struct e1000_hw *hw)
+{
+	s32 i = 0;
+	while (i < AUTO_READ_DONE_TIMEOUT) {
+		if (er32(EECD) & E1000_EECD_AUTO_RD)
+			break;
+		msleep(1);
+		i++;
+	}
+	if (i == AUTO_READ_DONE_TIMEOUT) {
+		e_dbg("Auto read by HW from NVM has not completed.\n");
+		return -E1000_ERR_RESET;
+	}
+	return 0;
+}
+/**
+*  e1000e_valid_led_default - Verify a valid default LED config
+*  @hw: pointer to the HW structure
+*  @data: pointer to the NVM (EEPROM)
+*
+*  Read the EEPROM for the current default LED configuration.  If the
+*  LED configuration is not valid, set to a valid LED configuration.
+**/
+s32 e1000e_valid_led_default(struct e1000_hw *hw, u16 *data)
+{
+	s32 ret_val;
+	ret_val = e1000_read_nvm(hw, NVM_ID_LED_SETTINGS, 1, data);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		return ret_val;
+	}
+	if (*data == ID_LED_RESERVED_0000 || *data == ID_LED_RESERVED_FFFF)
+		*data = ID_LED_DEFAULT;
+	return 0;
+}
+/**
+*  e1000e_id_led_init -
+*  @hw: pointer to the HW structure
+*
+**/
+s32 e1000e_id_led_init(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	s32 ret_val;
+	const u32 ledctl_mask = 0x000000FF;
+	const u32 ledctl_on = E1000_LEDCTL_MODE_LED_ON;
+	const u32 ledctl_off = E1000_LEDCTL_MODE_LED_OFF;
+	u16 data, i, temp;
+	const u16 led_mask = 0x0F;
+	ret_val = hw->nvm.ops.valid_led_default(hw, &data);
+	if (ret_val)
+		return ret_val;
+	mac->ledctl_default = er32(LEDCTL);
+	mac->ledctl_mode1 = mac->ledctl_default;
+	mac->ledctl_mode2 = mac->ledctl_default;
+	for (i = 0; i < 4; i++) {
+		temp = (data >> (i << 2)) & led_mask;
+		switch (temp) {
+		case ID_LED_ON1_DEF2:
+		case ID_LED_ON1_ON2:
+		case ID_LED_ON1_OFF2:
+			mac->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
+			mac->ledctl_mode1 |= ledctl_on << (i << 3);
+			break;
+		case ID_LED_OFF1_DEF2:
+		case ID_LED_OFF1_ON2:
+		case ID_LED_OFF1_OFF2:
+			mac->ledctl_mode1 &= ~(ledctl_mask << (i << 3));
+			mac->ledctl_mode1 |= ledctl_off << (i << 3);
+			break;
+		default:
+			/* Do nothing */
+			break;
+		}
+		switch (temp) {
+		case ID_LED_DEF1_ON2:
+		case ID_LED_ON1_ON2:
+		case ID_LED_OFF1_ON2:
+			mac->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
+			mac->ledctl_mode2 |= ledctl_on << (i << 3);
+			break;
+		case ID_LED_DEF1_OFF2:
+		case ID_LED_ON1_OFF2:
+		case ID_LED_OFF1_OFF2:
+			mac->ledctl_mode2 &= ~(ledctl_mask << (i << 3));
+			mac->ledctl_mode2 |= ledctl_off << (i << 3);
+			break;
+		default:
+			/* Do nothing */
+			break;
+		}
+	}
+	return 0;
+}
+/**
+*  e1000e_setup_led_generic - Configures SW controllable LED
+*  @hw: pointer to the HW structure
+*
+*  This prepares the SW controllable LED for use and saves the current state
+*  of the LED so it can be later restored.
+**/
+s32 e1000e_setup_led_generic(struct e1000_hw *hw)
+{
+	u32 ledctl;
+	if (hw->mac.ops.setup_led != e1000e_setup_led_generic) {
+		return -E1000_ERR_CONFIG;
+	}
+	if (hw->phy.media_type == e1000_media_type_fiber) {
+		ledctl = er32(LEDCTL);
+		hw->mac.ledctl_default = ledctl;
+		/* Turn off LED0 */
+		ledctl &= ~(E1000_LEDCTL_LED0_IVRT |
+		            E1000_LEDCTL_LED0_BLINK |
+		            E1000_LEDCTL_LED0_MODE_MASK);
+		ledctl |= (E1000_LEDCTL_MODE_LED_OFF <<
+		           E1000_LEDCTL_LED0_MODE_SHIFT);
+		ew32(LEDCTL, ledctl);
+	} else if (hw->phy.media_type == e1000_media_type_copper) {
+		ew32(LEDCTL, hw->mac.ledctl_mode1);
+	}
+	return 0;
+}
+/**
+*  e1000e_cleanup_led_generic - Set LED config to default operation
+*  @hw: pointer to the HW structure
+*
+*  Remove the current LED configuration and set the LED configuration
+*  to the default value, saved from the EEPROM.
+**/
+s32 e1000e_cleanup_led_generic(struct e1000_hw *hw)
+{
+	ew32(LEDCTL, hw->mac.ledctl_default);
+	return 0;
+}
+/**
+*  e1000e_blink_led - Blink LED
+*  @hw: pointer to the HW structure
+*
+*  Blink the LEDs which are set to be on.
+**/
+s32 e1000e_blink_led(struct e1000_hw *hw)
+{
+	u32 ledctl_blink = 0;
+	u32 i;
+	if (hw->phy.media_type == e1000_media_type_fiber) {
+		/* always blink LED0 for PCI-E fiber */
+		ledctl_blink = E1000_LEDCTL_LED0_BLINK |
+		     (E1000_LEDCTL_MODE_LED_ON << E1000_LEDCTL_LED0_MODE_SHIFT);
+	} else {
+		/*
+		 * set the blink bit for each LED that's "on" (0x0E)
+		 * in ledctl_mode2
+		 */
+		ledctl_blink = hw->mac.ledctl_mode2;
+		for (i = 0; i < 4; i++)
+			if (((hw->mac.ledctl_mode2 >> (i * 8)) & 0xFF) ==
+			    E1000_LEDCTL_MODE_LED_ON)
+				ledctl_blink |= (E1000_LEDCTL_LED0_BLINK <<
+						 (i * 8));
+	}
+	ew32(LEDCTL, ledctl_blink);
+	return 0;
+}
+/**
+*  e1000e_led_on_generic - Turn LED on
+*  @hw: pointer to the HW structure
+*
+*  Turn LED on.
+**/
+s32 e1000e_led_on_generic(struct e1000_hw *hw)
+{
+	u32 ctrl;
+	switch (hw->phy.media_type) {
+	case e1000_media_type_fiber:
+		ctrl = er32(CTRL);
+		ctrl &= ~E1000_CTRL_SWDPIN0;
+		ctrl |= E1000_CTRL_SWDPIO0;
+		ew32(CTRL, ctrl);
+		break;
+	case e1000_media_type_copper:
+		ew32(LEDCTL, hw->mac.ledctl_mode2);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+/**
+*  e1000e_led_off_generic - Turn LED off
+*  @hw: pointer to the HW structure
+*
+*  Turn LED off.
+**/
+s32 e1000e_led_off_generic(struct e1000_hw *hw)
+{
+	u32 ctrl;
+	switch (hw->phy.media_type) {
+	case e1000_media_type_fiber:
+		ctrl = er32(CTRL);
+		ctrl |= E1000_CTRL_SWDPIN0;
+		ctrl |= E1000_CTRL_SWDPIO0;
+		ew32(CTRL, ctrl);
+		break;
+	case e1000_media_type_copper:
+		ew32(LEDCTL, hw->mac.ledctl_mode1);
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+/**
+*  e1000e_set_pcie_no_snoop - Set PCI-express capabilities
+*  @hw: pointer to the HW structure
+*  @no_snoop: bitmap of snoop events
+*
+*  Set the PCI-express register to snoop for events enabled in 'no_snoop'.
+**/
+void e1000e_set_pcie_no_snoop(struct e1000_hw *hw, u32 no_snoop)
+{
+	u32 gcr;
+	if (no_snoop) {
+		gcr = er32(GCR);
+		gcr &= ~(PCIE_NO_SNOOP_ALL);
+		gcr |= no_snoop;
+		ew32(GCR, gcr);
+	}
+}
+/**
+*  e1000e_disable_pcie_master - Disables PCI-express master access
+*  @hw: pointer to the HW structure
+*
+*  Returns 0 if successful, else returns -10
+*  (-E1000_ERR_MASTER_REQUESTS_PENDING) if master disable bit has not caused
+*  the master requests to be disabled.
+*
+*  Disables PCI-Express master access and verifies there are no pending
+*  requests.
+**/
+s32 e1000e_disable_pcie_master(struct e1000_hw *hw)
+{
+	u32 ctrl;
+	s32 timeout = MASTER_DISABLE_TIMEOUT;
+	ctrl = er32(CTRL);
+	ctrl |= E1000_CTRL_GIO_MASTER_DISABLE;
+	ew32(CTRL, ctrl);
+	while (timeout) {
+		if (!(er32(STATUS) &
+		      E1000_STATUS_GIO_MASTER_ENABLE))
+			break;
+		udelay(100);
+		timeout--;
+	}
+	if (!timeout) {
+		e_dbg("Master requests are pending.\n");
+		return -E1000_ERR_MASTER_REQUESTS_PENDING;
+	}
+	return 0;
+}
+/**
+*  e1000e_reset_adaptive - Reset Adaptive Interframe Spacing
+*  @hw: pointer to the HW structure
+*
+*  Reset the Adaptive Interframe Spacing throttle to default values.
+**/
+void e1000e_reset_adaptive(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	if (!mac->adaptive_ifs) {
+		e_dbg("Not in Adaptive IFS mode!\n");
+		goto out;
+	}
+	mac->current_ifs_val = 0;
+	mac->ifs_min_val = IFS_MIN;
+	mac->ifs_max_val = IFS_MAX;
+	mac->ifs_step_size = IFS_STEP;
+	mac->ifs_ratio = IFS_RATIO;
+	mac->in_ifs_mode = false;
+	ew32(AIT, 0);
+out:
+	return;
+}
+/**
+*  e1000e_update_adaptive - Update Adaptive Interframe Spacing
+*  @hw: pointer to the HW structure
+*
+*  Update the Adaptive Interframe Spacing Throttle value based on the
+*  time between transmitted packets and time between collisions.
+**/
+void e1000e_update_adaptive(struct e1000_hw *hw)
+{
+	struct e1000_mac_info *mac = &hw->mac;
+	if (!mac->adaptive_ifs) {
+		e_dbg("Not in Adaptive IFS mode!\n");
+		goto out;
+	}
+	if ((mac->collision_delta * mac->ifs_ratio) > mac->tx_packet_delta) {
+		if (mac->tx_packet_delta > MIN_NUM_XMITS) {
+			mac->in_ifs_mode = true;
+			if (mac->current_ifs_val < mac->ifs_max_val) {
+				if (!mac->current_ifs_val)
+					mac->current_ifs_val = mac->ifs_min_val;
+				else
+					mac->current_ifs_val +=
+						mac->ifs_step_size;
+				ew32(AIT, mac->current_ifs_val);
+			}
+		}
+	} else {
+		if (mac->in_ifs_mode &&
+		    (mac->tx_packet_delta <= MIN_NUM_XMITS)) {
+			mac->current_ifs_val = 0;
+			mac->in_ifs_mode = false;
+			ew32(AIT, 0);
+		}
+	}
+out:
+	return;
+}
+/**
+*  e1000_raise_eec_clk - Raise EEPROM clock
+*  @hw: pointer to the HW structure
+*  @eecd: pointer to the EEPROM
+*
+*  Enable/Raise the EEPROM clock bit.
+**/
+static void e1000_raise_eec_clk(struct e1000_hw *hw, u32 *eecd)
+{
+	*eecd = *eecd | E1000_EECD_SK;
+	ew32(EECD, *eecd);
+	e1e_flush();
+	udelay(hw->nvm.delay_usec);
+}
+/**
+*  e1000_lower_eec_clk - Lower EEPROM clock
+*  @hw: pointer to the HW structure
+*  @eecd: pointer to the EEPROM
+*
+*  Clear/Lower the EEPROM clock bit.
+**/
+static void e1000_lower_eec_clk(struct e1000_hw *hw, u32 *eecd)
+{
+	*eecd = *eecd & ~E1000_EECD_SK;
+	ew32(EECD, *eecd);
+	e1e_flush();
+	udelay(hw->nvm.delay_usec);
+}
+/**
+*  e1000_shift_out_eec_bits - Shift data bits our to the EEPROM
+*  @hw: pointer to the HW structure
+*  @data: data to send to the EEPROM
+*  @count: number of bits to shift out
+*
+*  We need to shift 'count' bits out to the EEPROM.  So, the value in the
+*  "data" parameter will be shifted out to the EEPROM one bit at a time.
+*  In order to do this, "data" must be broken down into bits.
+**/
+static void e1000_shift_out_eec_bits(struct e1000_hw *hw, u16 data, u16 count)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	u32 eecd = er32(EECD);
+	u32 mask;
+	mask = 0x01 << (count - 1);
+	if (nvm->type == e1000_nvm_eeprom_spi)
+		eecd |= E1000_EECD_DO;
+	do {
+		eecd &= ~E1000_EECD_DI;
+		if (data & mask)
+			eecd |= E1000_EECD_DI;
+		ew32(EECD, eecd);
+		e1e_flush();
+		udelay(nvm->delay_usec);
+		e1000_raise_eec_clk(hw, &eecd);
+		e1000_lower_eec_clk(hw, &eecd);
+		mask >>= 1;
+	} while (mask);
+	eecd &= ~E1000_EECD_DI;
+	ew32(EECD, eecd);
+}
+/**
+*  e1000_shift_in_eec_bits - Shift data bits in from the EEPROM
+*  @hw: pointer to the HW structure
+*  @count: number of bits to shift in
+*
+*  In order to read a register from the EEPROM, we need to shift 'count' bits
+*  in from the EEPROM.  Bits are "shifted in" by raising the clock input to
+*  the EEPROM (setting the SK bit), and then reading the value of the data out
+*  "DO" bit.  During this "shifting in" process the data in "DI" bit should
+*  always be clear.
+**/
+static u16 e1000_shift_in_eec_bits(struct e1000_hw *hw, u16 count)
+{
+	u32 eecd;
+	u32 i;
+	u16 data;
+	eecd = er32(EECD);
+	eecd &= ~(E1000_EECD_DO | E1000_EECD_DI);
+	data = 0;
+	for (i = 0; i < count; i++) {
+		data <<= 1;
+		e1000_raise_eec_clk(hw, &eecd);
+		eecd = er32(EECD);
+		eecd &= ~E1000_EECD_DI;
+		if (eecd & E1000_EECD_DO)
+			data |= 1;
+		e1000_lower_eec_clk(hw, &eecd);
+	}
+	return data;
+}
+/**
+*  e1000e_poll_eerd_eewr_done - Poll for EEPROM read/write completion
+*  @hw: pointer to the HW structure
+*  @ee_reg: EEPROM flag for polling
+*
+*  Polls the EEPROM status bit for either read or write completion based
+*  upon the value of 'ee_reg'.
+**/
+s32 e1000e_poll_eerd_eewr_done(struct e1000_hw *hw, int ee_reg)
+{
+	u32 attempts = 100000;
+	u32 i, reg = 0;
+	for (i = 0; i < attempts; i++) {
+		if (ee_reg == E1000_NVM_POLL_READ)
+			reg = er32(EERD);
+		else
+			reg = er32(EEWR);
+		if (reg & E1000_NVM_RW_REG_DONE)
+			return 0;
+		udelay(5);
+	}
+	return -E1000_ERR_NVM;
+}
+/**
+*  e1000e_acquire_nvm - Generic request for access to EEPROM
+*  @hw: pointer to the HW structure
+*
+*  Set the EEPROM access request bit and wait for EEPROM access grant bit.
+*  Return successful if access grant bit set, else clear the request for
+*  EEPROM access and return -E1000_ERR_NVM (-1).
+**/
+s32 e1000e_acquire_nvm(struct e1000_hw *hw)
+{
+	u32 eecd = er32(EECD);
+	s32 timeout = E1000_NVM_GRANT_ATTEMPTS;
+	ew32(EECD, eecd | E1000_EECD_REQ);
+	eecd = er32(EECD);
+	while (timeout) {
+		if (eecd & E1000_EECD_GNT)
+			break;
+		udelay(5);
+		eecd = er32(EECD);
+		timeout--;
+	}
+	if (!timeout) {
+		eecd &= ~E1000_EECD_REQ;
+		ew32(EECD, eecd);
+		e_dbg("Could not acquire NVM grant\n");
+		return -E1000_ERR_NVM;
+	}
+	return 0;
+}
+/**
+*  e1000_standby_nvm - Return EEPROM to standby state
+*  @hw: pointer to the HW structure
+*
+*  Return the EEPROM to a standby state.
+**/
+static void e1000_standby_nvm(struct e1000_hw *hw)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	u32 eecd = er32(EECD);
+	if (nvm->type == e1000_nvm_eeprom_spi) {
+		/* Toggle CS to flush commands */
+		eecd |= E1000_EECD_CS;
+		ew32(EECD, eecd);
+		e1e_flush();
+		udelay(nvm->delay_usec);
+		eecd &= ~E1000_EECD_CS;
+		ew32(EECD, eecd);
+		e1e_flush();
+		udelay(nvm->delay_usec);
+	}
+}
+/**
+*  e1000_stop_nvm - Terminate EEPROM command
+*  @hw: pointer to the HW structure
+*
+*  Terminates the current command by inverting the EEPROM's chip select pin.
+**/
+static void e1000_stop_nvm(struct e1000_hw *hw)
+{
+	u32 eecd;
+	eecd = er32(EECD);
+	if (hw->nvm.type == e1000_nvm_eeprom_spi) {
+		/* Pull CS high */
+		eecd |= E1000_EECD_CS;
+		e1000_lower_eec_clk(hw, &eecd);
+	}
+}
+/**
+*  e1000e_release_nvm - Release exclusive access to EEPROM
+*  @hw: pointer to the HW structure
+*
+*  Stop any current commands to the EEPROM and clear the EEPROM request bit.
+**/
+void e1000e_release_nvm(struct e1000_hw *hw)
+{
+	u32 eecd;
+	e1000_stop_nvm(hw);
+	eecd = er32(EECD);
+	eecd &= ~E1000_EECD_REQ;
+	ew32(EECD, eecd);
+}
+/**
+*  e1000_ready_nvm_eeprom - Prepares EEPROM for read/write
+*  @hw: pointer to the HW structure
+*
+*  Setups the EEPROM for reading and writing.
+**/
+static s32 e1000_ready_nvm_eeprom(struct e1000_hw *hw)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	u32 eecd = er32(EECD);
+	u16 timeout = 0;
+	u8 spi_stat_reg;
+	if (nvm->type == e1000_nvm_eeprom_spi) {
+		/* Clear SK and CS */
+		eecd &= ~(E1000_EECD_CS | E1000_EECD_SK);
+		ew32(EECD, eecd);
+		udelay(1);
+		timeout = NVM_MAX_RETRY_SPI;
+		/*
+		 * Read "Status Register" repeatedly until the LSB is cleared.
+		 * The EEPROM will signal that the command has been completed
+		 * by clearing bit 0 of the internal status register.  If it's
+		 * not cleared within 'timeout', then error out.
+		 */
+		while (timeout) {
+			e1000_shift_out_eec_bits(hw, NVM_RDSR_OPCODE_SPI,
+						 hw->nvm.opcode_bits);
+			spi_stat_reg = (u8)e1000_shift_in_eec_bits(hw, 8);
+			if (!(spi_stat_reg & NVM_STATUS_RDY_SPI))
+				break;
+			udelay(5);
+			e1000_standby_nvm(hw);
+			timeout--;
+		}
+		if (!timeout) {
+			e_dbg("SPI NVM Status error\n");
+			return -E1000_ERR_NVM;
+		}
+	}
+	return 0;
+}
+/**
+*  e1000e_read_nvm_eerd - Reads EEPROM using EERD register
+*  @hw: pointer to the HW structure
+*  @offset: offset of word in the EEPROM to read
+*  @words: number of words to read
+*  @data: word read from the EEPROM
+*
+*  Reads a 16 bit word from the EEPROM using the EERD register.
+**/
+s32 e1000e_read_nvm_eerd(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	u32 i, eerd = 0;
+	s32 ret_val = 0;
+	/*
+	 * A check for invalid values:  offset too large, too many words,
+	 * too many words for the offset, and not enough words.
+	 */
+	if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
+	    (words == 0)) {
+		e_dbg("nvm parameter(s) out of bounds\n");
+		return -E1000_ERR_NVM;
+	}
+	for (i = 0; i < words; i++) {
+		eerd = ((offset+i) << E1000_NVM_RW_ADDR_SHIFT) +
+		       E1000_NVM_RW_REG_START;
+		ew32(EERD, eerd);
+		ret_val = e1000e_poll_eerd_eewr_done(hw, E1000_NVM_POLL_READ);
+		if (ret_val)
+			break;
+		data[i] = (er32(EERD) >> E1000_NVM_RW_REG_DATA);
+	}
+	return ret_val;
+}
+/**
+*  e1000e_write_nvm_spi - Write to EEPROM using SPI
+*  @hw: pointer to the HW structure
+*  @offset: offset within the EEPROM to be written to
+*  @words: number of words to write
+*  @data: 16 bit word(s) to be written to the EEPROM
+*
+*  Writes data to EEPROM at offset using SPI interface.
+*
+*  If e1000e_update_nvm_checksum is not called after this function , the
+*  EEPROM will most likely contain an invalid checksum.
+**/
+s32 e1000e_write_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data)
+{
+	struct e1000_nvm_info *nvm = &hw->nvm;
+	s32 ret_val;
+	u16 widx = 0;
+	/*
+	 * A check for invalid values:  offset too large, too many words,
+	 * and not enough words.
+	 */
+	if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) ||
+	    (words == 0)) {
+		e_dbg("nvm parameter(s) out of bounds\n");
+		return -E1000_ERR_NVM;
+	}
+	ret_val = nvm->ops.acquire(hw);
+	if (ret_val)
+		return ret_val;
+	msleep(10);
+	while (widx < words) {
+		u8 write_opcode = NVM_WRITE_OPCODE_SPI;
+		ret_val = e1000_ready_nvm_eeprom(hw);
+		if (ret_val) {
+			nvm->ops.release(hw);
+			return ret_val;
+		}
+		e1000_standby_nvm(hw);
+		/* Send the WRITE ENABLE command (8 bit opcode) */
+		e1000_shift_out_eec_bits(hw, NVM_WREN_OPCODE_SPI,
+					 nvm->opcode_bits);
+		e1000_standby_nvm(hw);
+		/*
+		 * Some SPI eeproms use the 8th address bit embedded in the
+		 * opcode
+		 */
+		if ((nvm->address_bits == 8) && (offset >= 128))
+			write_opcode |= NVM_A8_OPCODE_SPI;
+		/* Send the Write command (8-bit opcode + addr) */
+		e1000_shift_out_eec_bits(hw, write_opcode, nvm->opcode_bits);
+		e1000_shift_out_eec_bits(hw, (u16)((offset + widx) * 2),
+					 nvm->address_bits);
+		/* Loop to allow for up to whole page write of eeprom */
+		while (widx < words) {
+			u16 word_out = data[widx];
+			word_out = (word_out >> 8) | (word_out << 8);
+			e1000_shift_out_eec_bits(hw, word_out, 16);
+			widx++;
+			if ((((offset + widx) * 2) % nvm->page_size) == 0) {
+				e1000_standby_nvm(hw);
+				break;
+			}
+		}
+	}
+	msleep(10);
+	nvm->ops.release(hw);
+	return 0;
+}
+/**
+*  e1000_read_mac_addr_generic - Read device MAC address
+*  @hw: pointer to the HW structure
+*
+*  Reads the device MAC address from the EEPROM and stores the value.
+*  Since devices with two ports use the same EEPROM, we increment the
+*  last bit in the MAC address for the second port.
+**/
+s32 e1000_read_mac_addr_generic(struct e1000_hw *hw)
+{
+	u32 rar_high;
+	u32 rar_low;
+	u16 i;
+	rar_high = er32(RAH(0));
+	rar_low = er32(RAL(0));
+	for (i = 0; i < E1000_RAL_MAC_ADDR_LEN; i++)
+		hw->mac.perm_addr[i] = (u8)(rar_low >> (i*8));
+	for (i = 0; i < E1000_RAH_MAC_ADDR_LEN; i++)
+		hw->mac.perm_addr[i+4] = (u8)(rar_high >> (i*8));
+	for (i = 0; i < ETH_ALEN; i++)
+		hw->mac.addr[i] = hw->mac.perm_addr[i];
+	return 0;
+}
+/**
+*  e1000e_validate_nvm_checksum_generic - Validate EEPROM checksum
+*  @hw: pointer to the HW structure
+*
+*  Calculates the EEPROM checksum by reading/adding each word of the EEPROM
+*  and then verifies that the sum of the EEPROM is equal to 0xBABA.
+**/
+s32 e1000e_validate_nvm_checksum_generic(struct e1000_hw *hw)
+{
+	s32 ret_val;
+	u16 checksum = 0;
+	u16 i, nvm_data;
+	for (i = 0; i < (NVM_CHECKSUM_REG + 1); i++) {
+		ret_val = e1000_read_nvm(hw, i, 1, &nvm_data);
+		if (ret_val) {
+			e_dbg("NVM Read Error\n");
+			return ret_val;
+		}
+		checksum += nvm_data;
+	}
+	if (checksum != (u16) NVM_SUM) {
+		e_dbg("NVM Checksum Invalid\n");
+		return -E1000_ERR_NVM;
+	}
+	return 0;
+}
+/**
+*  e1000e_update_nvm_checksum_generic - Update EEPROM checksum
+*  @hw: pointer to the HW structure
+*
+*  Updates the EEPROM checksum by reading/adding each word of the EEPROM
+*  up to the checksum.  Then calculates the EEPROM checksum and writes the
+*  value to the EEPROM.
+**/
+s32 e1000e_update_nvm_checksum_generic(struct e1000_hw *hw)
+{
+	s32 ret_val;
+	u16 checksum = 0;
+	u16 i, nvm_data;
+	for (i = 0; i < NVM_CHECKSUM_REG; i++) {
+		ret_val = e1000_read_nvm(hw, i, 1, &nvm_data);
+		if (ret_val) {
+			e_dbg("NVM Read Error while updating checksum.\n");
+			return ret_val;
+		}
+		checksum += nvm_data;
+	}
+	checksum = (u16) NVM_SUM - checksum;
+	ret_val = e1000_write_nvm(hw, NVM_CHECKSUM_REG, 1, &checksum);
+	if (ret_val)
+		e_dbg("NVM Write Error while updating checksum.\n");
+	return ret_val;
+}
+/**
+*  e1000e_reload_nvm - Reloads EEPROM
+*  @hw: pointer to the HW structure
+*
+*  Reloads the EEPROM by setting the "Reinitialize from EEPROM" bit in the
+*  extended control register.
+**/
+void e1000e_reload_nvm(struct e1000_hw *hw)
+{
+	u32 ctrl_ext;
+	udelay(10);
+	ctrl_ext = er32(CTRL_EXT);
+	ctrl_ext |= E1000_CTRL_EXT_EE_RST;
+	ew32(CTRL_EXT, ctrl_ext);
+	e1e_flush();
+}
+/**
+*  e1000_calculate_checksum - Calculate checksum for buffer
+*  @buffer: pointer to EEPROM
+*  @length: size of EEPROM to calculate a checksum for
+*
+*  Calculates the checksum for some buffer on a specified length.  The
+*  checksum calculated is returned.
+**/
+static u8 e1000_calculate_checksum(u8 *buffer, u32 length)
+{
+	u32 i;
+	u8  sum = 0;
+	if (!buffer)
+		return 0;
+	for (i = 0; i < length; i++)
+		sum += buffer[i];
+	return (u8) (0 - sum);
+}
+/**
+*  e1000_mng_enable_host_if - Checks host interface is enabled
+*  @hw: pointer to the HW structure
+*
+*  Returns E1000_success upon success, else E1000_ERR_HOST_INTERFACE_COMMAND
+*
+*  This function checks whether the HOST IF is enabled for command operation
+*  and also checks whether the previous command is completed.  It busy waits
+*  in case of previous command is not completed.
+**/
+static s32 e1000_mng_enable_host_if(struct e1000_hw *hw)
+{
+	u32 hicr;
+	u8 i;
+	/* Check that the host interface is enabled. */
+	hicr = er32(HICR);
+	if ((hicr & E1000_HICR_EN) == 0) {
+		e_dbg("E1000_HOST_EN bit disabled.\n");
+		return -E1000_ERR_HOST_INTERFACE_COMMAND;
+	}
+	/* check the previous command is completed */
+	for (i = 0; i < E1000_MNG_DHCP_COMMAND_TIMEOUT; i++) {
+		hicr = er32(HICR);
+		if (!(hicr & E1000_HICR_C))
+			break;
+		mdelay(1);
+	}
+	if (i == E1000_MNG_DHCP_COMMAND_TIMEOUT) {
+		e_dbg("Previous command timeout failed .\n");
+		return -E1000_ERR_HOST_INTERFACE_COMMAND;
+	}
+	return 0;
+}
+/**
+*  e1000e_check_mng_mode_generic - check management mode
+*  @hw: pointer to the HW structure
+*
+*  Reads the firmware semaphore register and returns true (>0) if
+*  manageability is enabled, else false (0).
+**/
+bool e1000e_check_mng_mode_generic(struct e1000_hw *hw)
+{
+	u32 fwsm = er32(FWSM);
+	return (fwsm & E1000_FWSM_MODE_MASK) ==
+		(E1000_MNG_IAMT_MODE << E1000_FWSM_MODE_SHIFT);
+}
+/**
+*  e1000e_enable_tx_pkt_filtering - Enable packet filtering on Tx
+*  @hw: pointer to the HW structure
+*
+*  Enables packet filtering on transmit packets if manageability is enabled
+*  and host interface is enabled.
+**/
+bool e1000e_enable_tx_pkt_filtering(struct e1000_hw *hw)
+{
+	struct e1000_host_mng_dhcp_cookie *hdr = &hw->mng_cookie;
+	u32 *buffer = (u32 *)&hw->mng_cookie;
+	u32 offset;
+	s32 ret_val, hdr_csum, csum;
+	u8 i, len;
+	hw->mac.tx_pkt_filtering = true;
+	/* No manageability, no filtering */
+	if (!e1000e_check_mng_mode(hw)) {
+		hw->mac.tx_pkt_filtering = false;
+		goto out;
+	}
+	/*
+	 * If we can't read from the host interface for whatever
+	 * reason, disable filtering.
+	 */
+	ret_val = e1000_mng_enable_host_if(hw);
+	if (ret_val) {
+		hw->mac.tx_pkt_filtering = false;
+		goto out;
+	}
+	/* Read in the header.  Length and offset are in dwords. */
+	len    = E1000_MNG_DHCP_COOKIE_LENGTH >> 2;
+	offset = E1000_MNG_DHCP_COOKIE_OFFSET >> 2;
+	for (i = 0; i < len; i++)
+		*(buffer + i) = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF, offset + i);
+	hdr_csum = hdr->checksum;
+	hdr->checksum = 0;
+	csum = e1000_calculate_checksum((u8 *)hdr,
+					E1000_MNG_DHCP_COOKIE_LENGTH);
+	/*
+	 * If either the checksums or signature don't match, then
+	 * the cookie area isn't considered valid, in which case we
+	 * take the safe route of assuming Tx filtering is enabled.
+	 */
+	if ((hdr_csum != csum) || (hdr->signature != E1000_IAMT_SIGNATURE)) {
+		hw->mac.tx_pkt_filtering = true;
+		goto out;
+	}
+	/* Cookie area is valid, make the final check for filtering. */
+	if (!(hdr->status & E1000_MNG_DHCP_COOKIE_STATUS_PARSING)) {
+		hw->mac.tx_pkt_filtering = false;
+		goto out;
+	}
+out:
+	return hw->mac.tx_pkt_filtering;
+}
+/**
+*  e1000_mng_write_cmd_header - Writes manageability command header
+*  @hw: pointer to the HW structure
+*  @hdr: pointer to the host interface command header
+*
+*  Writes the command header after does the checksum calculation.
+**/
+static s32 e1000_mng_write_cmd_header(struct e1000_hw *hw,
+				  struct e1000_host_mng_command_header *hdr)
+{
+	u16 i, length = sizeof(struct e1000_host_mng_command_header);
+	/* Write the whole command header structure with new checksum. */
+	hdr->checksum = e1000_calculate_checksum((u8 *)hdr, length);
+	length >>= 2;
+	/* Write the relevant command block into the ram area. */
+	for (i = 0; i < length; i++) {
+		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, i,
+					    *((u32 *) hdr + i));
+		e1e_flush();
+	}
+	return 0;
+}
+/**
+*  e1000_mng_host_if_write - Write to the manageability host interface
+*  @hw: pointer to the HW structure
+*  @buffer: pointer to the host interface buffer
+*  @length: size of the buffer
+*  @offset: location in the buffer to write to
+*  @sum: sum of the data (not checksum)
+*
+*  This function writes the buffer content at the offset given on the host if.
+*  It also does alignment considerations to do the writes in most efficient
+*  way.  Also fills up the sum of the buffer in *buffer parameter.
+**/
+static s32 e1000_mng_host_if_write(struct e1000_hw *hw, u8 *buffer,
+				   u16 length, u16 offset, u8 *sum)
+{
+	u8 *tmp;
+	u8 *bufptr = buffer;
+	u32 data = 0;
+	u16 remaining, i, j, prev_bytes;
+	/* sum = only sum of the data and it is not checksum */
+	if (length == 0 || offset + length > E1000_HI_MAX_MNG_DATA_LENGTH)
+		return -E1000_ERR_PARAM;
+	tmp = (u8 *)&data;
+	prev_bytes = offset & 0x3;
+	offset >>= 2;
+	if (prev_bytes) {
+		data = E1000_READ_REG_ARRAY(hw, E1000_HOST_IF, offset);
+		for (j = prev_bytes; j < sizeof(u32); j++) {
+			*(tmp + j) = *bufptr++;
+			*sum += *(tmp + j);
+		}
+		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset, data);
+		length -= j - prev_bytes;
+		offset++;
+	}
+	remaining = length & 0x3;
+	length -= remaining;
+	/* Calculate length in DWORDs */
+	length >>= 2;
+	/*
+	 * The device driver writes the relevant command block into the
+	 * ram area.
+	 */
+	for (i = 0; i < length; i++) {
+		for (j = 0; j < sizeof(u32); j++) {
+			*(tmp + j) = *bufptr++;
+			*sum += *(tmp + j);
+		}
+		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);
+	}
+	if (remaining) {
+		for (j = 0; j < sizeof(u32); j++) {
+			if (j < remaining)
+				*(tmp + j) = *bufptr++;
+			else
+				*(tmp + j) = 0;
+			*sum += *(tmp + j);
+		}
+		E1000_WRITE_REG_ARRAY(hw, E1000_HOST_IF, offset + i, data);
+	}
+	return 0;
+}
+/**
+*  e1000e_mng_write_dhcp_info - Writes DHCP info to host interface
+*  @hw: pointer to the HW structure
+*  @buffer: pointer to the host interface
+*  @length: size of the buffer
+*
+*  Writes the DHCP information to the host interface.
+**/
+s32 e1000e_mng_write_dhcp_info(struct e1000_hw *hw, u8 *buffer, u16 length)
+{
+	struct e1000_host_mng_command_header hdr;
+	s32 ret_val;
+	u32 hicr;
+	hdr.command_id = E1000_MNG_DHCP_TX_PAYLOAD_CMD;
+	hdr.command_length = length;
+	hdr.reserved1 = 0;
+	hdr.reserved2 = 0;
+	hdr.checksum = 0;
+	/* Enable the host interface */
+	ret_val = e1000_mng_enable_host_if(hw);
+	if (ret_val)
+		return ret_val;
+	/* Populate the host interface with the contents of "buffer". */
+	ret_val = e1000_mng_host_if_write(hw, buffer, length,
+					  sizeof(hdr), &(hdr.checksum));
+	if (ret_val)
+		return ret_val;
+	/* Write the manageability command header */
+	ret_val = e1000_mng_write_cmd_header(hw, &hdr);
+	if (ret_val)
+		return ret_val;
+	/* Tell the ARC a new command is pending. */
+	hicr = er32(HICR);
+	ew32(HICR, hicr | E1000_HICR_C);
+	return 0;
+}
+/**
+*  e1000e_enable_mng_pass_thru - Enable processing of ARP's
+*  @hw: pointer to the HW structure
+*
+*  Verifies the hardware needs to allow ARPs to be processed by the host.
+**/
+bool e1000e_enable_mng_pass_thru(struct e1000_hw *hw)
+{
+	u32 manc;
+	u32 fwsm, factps;
+	bool ret_val = false;
+	manc = er32(MANC);
+	if (!(manc & E1000_MANC_RCV_TCO_EN) ||
+	    !(manc & E1000_MANC_EN_MAC_ADDR_FILTER))
+		return ret_val;
+	if (hw->mac.arc_subsystem_valid) {
+		fwsm = er32(FWSM);
+		factps = er32(FACTPS);
+		if (!(factps & E1000_FACTPS_MNGCG) &&
+		    ((fwsm & E1000_FWSM_MODE_MASK) ==
+		     (e1000_mng_mode_pt << E1000_FWSM_MODE_SHIFT))) {
+			ret_val = true;
+			return ret_val;
+		}
+	} else {
+		if ((manc & E1000_MANC_SMBUS_EN) &&
+		    !(manc & E1000_MANC_ASF_EN)) {
+			ret_val = true;
+			return ret_val;
+		}
+	}
+	return ret_val;
+}
+s32 e1000e_read_pba_num(struct e1000_hw *hw, u32 *pba_num)
+{
+	s32 ret_val;
+	u16 nvm_data;
+	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_0, 1, &nvm_data);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		return ret_val;
+	}
+	*pba_num = (u32)(nvm_data << 16);
+	ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_1, 1, &nvm_data);
+	if (ret_val) {
+		e_dbg("NVM Read Error\n");
+		return ret_val;
+	}
+	*pba_num |= nvm_data;
+	return 0;
+}

branch	redundancy
changeset 2133	74dbd0b7d6aa