Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 650 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igc/igc_i225.c b/drivers/net/ethernet/intel/igc/igc_i225.c
new file mode 100644
index 000000000..59d5c467e
--- /dev/null
+++ b/drivers/net/ethernet/intel/igc/igc_i225.c
@@ -0,0 +1,650 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c)  2018 Intel Corporation */
+
+#include <linux/delay.h>
+
+#include "igc_hw.h"
+
+/**
+ * igc_acquire_nvm_i225 - Acquire exclusive access to EEPROM
+ * @hw: pointer to the HW structure
+ *
+ * Acquire the necessary semaphores for exclusive access to the EEPROM.
+ * 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 -IGC_ERR_NVM (-1).
+ */
+static s32 igc_acquire_nvm_i225(struct igc_hw *hw)
+{
+	return igc_acquire_swfw_sync_i225(hw, IGC_SWFW_EEP_SM);
+}
+
+/**
+ * igc_release_nvm_i225 - Release exclusive access to EEPROM
+ * @hw: pointer to the HW structure
+ *
+ * Stop any current commands to the EEPROM and clear the EEPROM request bit,
+ * then release the semaphores acquired.
+ */
+static void igc_release_nvm_i225(struct igc_hw *hw)
+{
+	igc_release_swfw_sync_i225(hw, IGC_SWFW_EEP_SM);
+}
+
+/**
+ * igc_get_hw_semaphore_i225 - Acquire hardware semaphore
+ * @hw: pointer to the HW structure
+ *
+ * Acquire the HW semaphore to access the PHY or NVM
+ */
+static s32 igc_get_hw_semaphore_i225(struct igc_hw *hw)
+{
+	s32 timeout = hw->nvm.word_size + 1;
+	s32 i = 0;
+	u32 swsm;
+
+	/* Get the SW semaphore */
+	while (i < timeout) {
+		swsm = rd32(IGC_SWSM);
+		if (!(swsm & IGC_SWSM_SMBI))
+			break;
+
+		usleep_range(500, 600);
+		i++;
+	}
+
+	if (i == timeout) {
+		/* In rare circumstances, the SW semaphore may already be held
+		 * unintentionally. Clear the semaphore once before giving up.
+		 */
+		if (hw->dev_spec._base.clear_semaphore_once) {
+			hw->dev_spec._base.clear_semaphore_once = false;
+			igc_put_hw_semaphore(hw);
+			for (i = 0; i < timeout; i++) {
+				swsm = rd32(IGC_SWSM);
+				if (!(swsm & IGC_SWSM_SMBI))
+					break;
+
+				usleep_range(500, 600);
+			}
+		}
+
+		/* If we do not have the semaphore here, we have to give up. */
+		if (i == timeout) {
+			hw_dbg("Driver can't access device - SMBI bit is set.\n");
+			return -IGC_ERR_NVM;
+		}
+	}
+
+	/* Get the FW semaphore. */
+	for (i = 0; i < timeout; i++) {
+		swsm = rd32(IGC_SWSM);
+		wr32(IGC_SWSM, swsm | IGC_SWSM_SWESMBI);
+
+		/* Semaphore acquired if bit latched */
+		if (rd32(IGC_SWSM) & IGC_SWSM_SWESMBI)
+			break;
+
+		usleep_range(500, 600);
+	}
+
+	if (i == timeout) {
+		/* Release semaphores */
+		igc_put_hw_semaphore(hw);
+		hw_dbg("Driver can't access the NVM\n");
+		return -IGC_ERR_NVM;
+	}
+
+	return 0;
+}
+
+/**
+ * igc_acquire_swfw_sync_i225 - Acquire SW/FW semaphore
+ * @hw: pointer to the HW structure
+ * @mask: specifies which semaphore to acquire
+ *
+ * Acquire the SW/FW semaphore to access the PHY or NVM.  The mask
+ * will also specify which port we're acquiring the lock for.
+ */
+s32 igc_acquire_swfw_sync_i225(struct igc_hw *hw, u16 mask)
+{
+	s32 i = 0, timeout = 200;
+	u32 fwmask = mask << 16;
+	u32 swmask = mask;
+	s32 ret_val = 0;
+	u32 swfw_sync;
+
+	while (i < timeout) {
+		if (igc_get_hw_semaphore_i225(hw)) {
+			ret_val = -IGC_ERR_SWFW_SYNC;
+			goto out;
+		}
+
+		swfw_sync = rd32(IGC_SW_FW_SYNC);
+		if (!(swfw_sync & (fwmask | swmask)))
+			break;
+
+		/* Firmware currently using resource (fwmask) */
+		igc_put_hw_semaphore(hw);
+		mdelay(5);
+		i++;
+	}
+
+	if (i == timeout) {
+		hw_dbg("Driver can't access resource, SW_FW_SYNC timeout.\n");
+		ret_val = -IGC_ERR_SWFW_SYNC;
+		goto out;
+	}
+
+	swfw_sync |= swmask;
+	wr32(IGC_SW_FW_SYNC, swfw_sync);
+
+	igc_put_hw_semaphore(hw);
+out:
+	return ret_val;
+}
+
+/**
+ * igc_release_swfw_sync_i225 - Release SW/FW semaphore
+ * @hw: pointer to the HW structure
+ * @mask: specifies which semaphore to acquire
+ *
+ * Release the SW/FW semaphore used to access the PHY or NVM.  The mask
+ * will also specify which port we're releasing the lock for.
+ */
+void igc_release_swfw_sync_i225(struct igc_hw *hw, u16 mask)
+{
+	u32 swfw_sync;
+
+	/* Releasing the resource requires first getting the HW semaphore.
+	 * If we fail to get the semaphore, there is nothing we can do,
+	 * except log an error and quit. We are not allowed to hang here
+	 * indefinitely, as it may cause denial of service or system crash.
+	 */
+	if (igc_get_hw_semaphore_i225(hw)) {
+		hw_dbg("Failed to release SW_FW_SYNC.\n");
+		return;
+	}
+
+	swfw_sync = rd32(IGC_SW_FW_SYNC);
+	swfw_sync &= ~mask;
+	wr32(IGC_SW_FW_SYNC, swfw_sync);
+
+	igc_put_hw_semaphore(hw);
+}
+
+/**
+ * igc_read_nvm_srrd_i225 - Reads Shadow Ram using EERD register
+ * @hw: pointer to the HW structure
+ * @offset: offset of word in the Shadow Ram to read
+ * @words: number of words to read
+ * @data: word read from the Shadow Ram
+ *
+ * Reads a 16 bit word from the Shadow Ram using the EERD register.
+ * Uses necessary synchronization semaphores.
+ */
+static s32 igc_read_nvm_srrd_i225(struct igc_hw *hw, u16 offset, u16 words,
+				  u16 *data)
+{
+	s32 status = 0;
+	u16 i, count;
+
+	/* We cannot hold synchronization semaphores for too long,
+	 * because of forceful takeover procedure. However it is more efficient
+	 * to read in bursts than synchronizing access for each word.
+	 */
+	for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) {
+		count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ?
+			IGC_EERD_EEWR_MAX_COUNT : (words - i);
+
+		status = hw->nvm.ops.acquire(hw);
+		if (status)
+			break;
+
+		status = igc_read_nvm_eerd(hw, offset, count, data + i);
+		hw->nvm.ops.release(hw);
+		if (status)
+			break;
+	}
+
+	return status;
+}
+
+/**
+ * igc_write_nvm_srwr - Write to Shadow Ram using EEWR
+ * @hw: pointer to the HW structure
+ * @offset: offset within the Shadow Ram to be written to
+ * @words: number of words to write
+ * @data: 16 bit word(s) to be written to the Shadow Ram
+ *
+ * Writes data to Shadow Ram at offset using EEWR register.
+ *
+ * If igc_update_nvm_checksum is not called after this function , the
+ * Shadow Ram will most likely contain an invalid checksum.
+ */
+static s32 igc_write_nvm_srwr(struct igc_hw *hw, u16 offset, u16 words,
+			      u16 *data)
+{
+	struct igc_nvm_info *nvm = &hw->nvm;
+	s32 ret_val = -IGC_ERR_NVM;
+	u32 attempts = 100000;
+	u32 i, k, eewr = 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) {
+		hw_dbg("nvm parameter(s) out of bounds\n");
+		return ret_val;
+	}
+
+	for (i = 0; i < words; i++) {
+		ret_val = -IGC_ERR_NVM;
+		eewr = ((offset + i) << IGC_NVM_RW_ADDR_SHIFT) |
+			(data[i] << IGC_NVM_RW_REG_DATA) |
+			IGC_NVM_RW_REG_START;
+
+		wr32(IGC_SRWR, eewr);
+
+		for (k = 0; k < attempts; k++) {
+			if (IGC_NVM_RW_REG_DONE &
+			    rd32(IGC_SRWR)) {
+				ret_val = 0;
+				break;
+			}
+			udelay(5);
+		}
+
+		if (ret_val) {
+			hw_dbg("Shadow RAM write EEWR timed out\n");
+			break;
+		}
+	}
+
+	return ret_val;
+}
+
+/**
+ * igc_write_nvm_srwr_i225 - Write to Shadow RAM using EEWR
+ * @hw: pointer to the HW structure
+ * @offset: offset within the Shadow RAM to be written to
+ * @words: number of words to write
+ * @data: 16 bit word(s) to be written to the Shadow RAM
+ *
+ * Writes data to Shadow RAM at offset using EEWR register.
+ *
+ * If igc_update_nvm_checksum is not called after this function , the
+ * data will not be committed to FLASH and also Shadow RAM will most likely
+ * contain an invalid checksum.
+ *
+ * If error code is returned, data and Shadow RAM may be inconsistent - buffer
+ * partially written.
+ */
+static s32 igc_write_nvm_srwr_i225(struct igc_hw *hw, u16 offset, u16 words,
+				   u16 *data)
+{
+	s32 status = 0;
+	u16 i, count;
+
+	/* We cannot hold synchronization semaphores for too long,
+	 * because of forceful takeover procedure. However it is more efficient
+	 * to write in bursts than synchronizing access for each word.
+	 */
+	for (i = 0; i < words; i += IGC_EERD_EEWR_MAX_COUNT) {
+		count = (words - i) / IGC_EERD_EEWR_MAX_COUNT > 0 ?
+			IGC_EERD_EEWR_MAX_COUNT : (words - i);
+
+		status = hw->nvm.ops.acquire(hw);
+		if (status)
+			break;
+
+		status = igc_write_nvm_srwr(hw, offset, count, data + i);
+		hw->nvm.ops.release(hw);
+		if (status)
+			break;
+	}
+
+	return status;
+}
+
+/**
+ * igc_validate_nvm_checksum_i225 - 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.
+ */
+static s32 igc_validate_nvm_checksum_i225(struct igc_hw *hw)
+{
+	s32 (*read_op_ptr)(struct igc_hw *hw, u16 offset, u16 count,
+			   u16 *data);
+	s32 status = 0;
+
+	status = hw->nvm.ops.acquire(hw);
+	if (status)
+		goto out;
+
+	/* Replace the read function with semaphore grabbing with
+	 * the one that skips this for a while.
+	 * We have semaphore taken already here.
+	 */
+	read_op_ptr = hw->nvm.ops.read;
+	hw->nvm.ops.read = igc_read_nvm_eerd;
+
+	status = igc_validate_nvm_checksum(hw);
+
+	/* Revert original read operation. */
+	hw->nvm.ops.read = read_op_ptr;
+
+	hw->nvm.ops.release(hw);
+
+out:
+	return status;
+}
+
+/**
+ * igc_pool_flash_update_done_i225 - Pool FLUDONE status
+ * @hw: pointer to the HW structure
+ */
+static s32 igc_pool_flash_update_done_i225(struct igc_hw *hw)
+{
+	s32 ret_val = -IGC_ERR_NVM;
+	u32 i, reg;
+
+	for (i = 0; i < IGC_FLUDONE_ATTEMPTS; i++) {
+		reg = rd32(IGC_EECD);
+		if (reg & IGC_EECD_FLUDONE_I225) {
+			ret_val = 0;
+			break;
+		}
+		udelay(5);
+	}
+
+	return ret_val;
+}
+
+/**
+ * igc_update_flash_i225 - Commit EEPROM to the flash
+ * @hw: pointer to the HW structure
+ */
+static s32 igc_update_flash_i225(struct igc_hw *hw)
+{
+	s32 ret_val = 0;
+	u32 flup;
+
+	ret_val = igc_pool_flash_update_done_i225(hw);
+	if (ret_val == -IGC_ERR_NVM) {
+		hw_dbg("Flash update time out\n");
+		goto out;
+	}
+
+	flup = rd32(IGC_EECD) | IGC_EECD_FLUPD_I225;
+	wr32(IGC_EECD, flup);
+
+	ret_val = igc_pool_flash_update_done_i225(hw);
+	if (ret_val)
+		hw_dbg("Flash update time out\n");
+	else
+		hw_dbg("Flash update complete\n");
+
+out:
+	return ret_val;
+}
+
+/**
+ * igc_update_nvm_checksum_i225 - 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. Next commit EEPROM data onto the Flash.
+ */
+static s32 igc_update_nvm_checksum_i225(struct igc_hw *hw)
+{
+	u16 checksum = 0;
+	s32 ret_val = 0;
+	u16 i, nvm_data;
+
+	/* Read the first word from the EEPROM. If this times out or fails, do
+	 * not continue or we could be in for a very long wait while every
+	 * EEPROM read fails
+	 */
+	ret_val = igc_read_nvm_eerd(hw, 0, 1, &nvm_data);
+	if (ret_val) {
+		hw_dbg("EEPROM read failed\n");
+		goto out;
+	}
+
+	ret_val = hw->nvm.ops.acquire(hw);
+	if (ret_val)
+		goto out;
+
+	/* Do not use hw->nvm.ops.write, hw->nvm.ops.read
+	 * because we do not want to take the synchronization
+	 * semaphores twice here.
+	 */
+
+	for (i = 0; i < NVM_CHECKSUM_REG; i++) {
+		ret_val = igc_read_nvm_eerd(hw, i, 1, &nvm_data);
+		if (ret_val) {
+			hw->nvm.ops.release(hw);
+			hw_dbg("NVM Read Error while updating checksum.\n");
+			goto out;
+		}
+		checksum += nvm_data;
+	}
+	checksum = (u16)NVM_SUM - checksum;
+	ret_val = igc_write_nvm_srwr(hw, NVM_CHECKSUM_REG, 1,
+				     &checksum);
+	if (ret_val) {
+		hw->nvm.ops.release(hw);
+		hw_dbg("NVM Write Error while updating checksum.\n");
+		goto out;
+	}
+
+	hw->nvm.ops.release(hw);
+
+	ret_val = igc_update_flash_i225(hw);
+
+out:
+	return ret_val;
+}
+
+/**
+ * igc_get_flash_presence_i225 - Check if flash device is detected
+ * @hw: pointer to the HW structure
+ */
+bool igc_get_flash_presence_i225(struct igc_hw *hw)
+{
+	bool ret_val = false;
+	u32 eec = 0;
+
+	eec = rd32(IGC_EECD);
+	if (eec & IGC_EECD_FLASH_DETECTED_I225)
+		ret_val = true;
+
+	return ret_val;
+}
+
+/**
+ * igc_init_nvm_params_i225 - Init NVM func ptrs.
+ * @hw: pointer to the HW structure
+ */
+s32 igc_init_nvm_params_i225(struct igc_hw *hw)
+{
+	struct igc_nvm_info *nvm = &hw->nvm;
+
+	nvm->ops.acquire = igc_acquire_nvm_i225;
+	nvm->ops.release = igc_release_nvm_i225;
+
+	/* NVM Function Pointers */
+	if (igc_get_flash_presence_i225(hw)) {
+		nvm->ops.read = igc_read_nvm_srrd_i225;
+		nvm->ops.write = igc_write_nvm_srwr_i225;
+		nvm->ops.validate = igc_validate_nvm_checksum_i225;
+		nvm->ops.update = igc_update_nvm_checksum_i225;
+	} else {
+		nvm->ops.read = igc_read_nvm_eerd;
+		nvm->ops.write = NULL;
+		nvm->ops.validate = NULL;
+		nvm->ops.update = NULL;
+	}
+	return 0;
+}
+
+/**
+ *  igc_set_eee_i225 - Enable/disable EEE support
+ *  @hw: pointer to the HW structure
+ *  @adv2p5G: boolean flag enabling 2.5G EEE advertisement
+ *  @adv1G: boolean flag enabling 1G EEE advertisement
+ *  @adv100M: boolean flag enabling 100M EEE advertisement
+ *
+ *  Enable/disable EEE based on setting in dev_spec structure.
+ **/
+s32 igc_set_eee_i225(struct igc_hw *hw, bool adv2p5G, bool adv1G,
+		     bool adv100M)
+{
+	u32 ipcnfg, eeer;
+
+	ipcnfg = rd32(IGC_IPCNFG);
+	eeer = rd32(IGC_EEER);
+
+	/* enable or disable per user setting */
+	if (hw->dev_spec._base.eee_enable) {
+		u32 eee_su = rd32(IGC_EEE_SU);
+
+		if (adv100M)
+			ipcnfg |= IGC_IPCNFG_EEE_100M_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_100M_AN;
+
+		if (adv1G)
+			ipcnfg |= IGC_IPCNFG_EEE_1G_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_1G_AN;
+
+		if (adv2p5G)
+			ipcnfg |= IGC_IPCNFG_EEE_2_5G_AN;
+		else
+			ipcnfg &= ~IGC_IPCNFG_EEE_2_5G_AN;
+
+		eeer |= (IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
+			 IGC_EEER_LPI_FC);
+
+		/* This bit should not be set in normal operation. */
+		if (eee_su & IGC_EEE_SU_LPI_CLK_STP)
+			hw_dbg("LPI Clock Stop Bit should not be set!\n");
+	} else {
+		ipcnfg &= ~(IGC_IPCNFG_EEE_2_5G_AN | IGC_IPCNFG_EEE_1G_AN |
+			    IGC_IPCNFG_EEE_100M_AN);
+		eeer &= ~(IGC_EEER_TX_LPI_EN | IGC_EEER_RX_LPI_EN |
+			  IGC_EEER_LPI_FC);
+	}
+	wr32(IGC_IPCNFG, ipcnfg);
+	wr32(IGC_EEER, eeer);
+	rd32(IGC_IPCNFG);
+	rd32(IGC_EEER);
+
+	return IGC_SUCCESS;
+}
+
+/* igc_set_ltr_i225 - Set Latency Tolerance Reporting thresholds
+ * @hw: pointer to the HW structure
+ * @link: bool indicating link status
+ *
+ * Set the LTR thresholds based on the link speed (Mbps), EEE, and DMAC
+ * settings, otherwise specify that there is no LTR requirement.
+ */
+s32 igc_set_ltr_i225(struct igc_hw *hw, bool link)
+{
+	u32 tw_system, ltrc, ltrv, ltr_min, ltr_max, scale_min, scale_max;
+	u16 speed, duplex;
+	s32 size;
+
+	/* If we do not have link, LTR thresholds are zero. */
+	if (link) {
+		hw->mac.ops.get_speed_and_duplex(hw, &speed, &duplex);
+
+		/* Check if using copper interface with EEE enabled or if the
+		 * link speed is 10 Mbps.
+		 */
+		if (hw->dev_spec._base.eee_enable &&
+		    speed != SPEED_10) {
+			/* EEE enabled, so send LTRMAX threshold. */
+			ltrc = rd32(IGC_LTRC) |
+			       IGC_LTRC_EEEMS_EN;
+			wr32(IGC_LTRC, ltrc);
+
+			/* Calculate tw_system (nsec). */
+			if (speed == SPEED_100) {
+				tw_system = ((rd32(IGC_EEE_SU) &
+					     IGC_TW_SYSTEM_100_MASK) >>
+					     IGC_TW_SYSTEM_100_SHIFT) * 500;
+			} else {
+				tw_system = (rd32(IGC_EEE_SU) &
+					     IGC_TW_SYSTEM_1000_MASK) * 500;
+			}
+		} else {
+			tw_system = 0;
+		}
+
+		/* Get the Rx packet buffer size. */
+		size = rd32(IGC_RXPBS) &
+		       IGC_RXPBS_SIZE_I225_MASK;
+
+		/* Calculations vary based on DMAC settings. */
+		if (rd32(IGC_DMACR) & IGC_DMACR_DMAC_EN) {
+			size -= (rd32(IGC_DMACR) &
+				 IGC_DMACR_DMACTHR_MASK) >>
+				 IGC_DMACR_DMACTHR_SHIFT;
+			/* Convert size to bits. */
+			size *= 1024 * 8;
+		} else {
+			/* Convert size to bytes, subtract the MTU, and then
+			 * convert the size to bits.
+			 */
+			size *= 1024;
+			size *= 8;
+		}
+
+		if (size < 0) {
+			hw_dbg("Invalid effective Rx buffer size %d\n",
+			       size);
+			return -IGC_ERR_CONFIG;
+		}
+
+		/* Calculate the thresholds. Since speed is in Mbps, simplify
+		 * the calculation by multiplying size/speed by 1000 for result
+		 * to be in nsec before dividing by the scale in nsec. Set the
+		 * scale such that the LTR threshold fits in the register.
+		 */
+		ltr_min = (1000 * size) / speed;
+		ltr_max = ltr_min + tw_system;
+		scale_min = (ltr_min / 1024) < 1024 ? IGC_LTRMINV_SCALE_1024 :
+			    IGC_LTRMINV_SCALE_32768;
+		scale_max = (ltr_max / 1024) < 1024 ? IGC_LTRMAXV_SCALE_1024 :
+			    IGC_LTRMAXV_SCALE_32768;
+		ltr_min /= scale_min == IGC_LTRMINV_SCALE_1024 ? 1024 : 32768;
+		ltr_min -= 1;
+		ltr_max /= scale_max == IGC_LTRMAXV_SCALE_1024 ? 1024 : 32768;
+		ltr_max -= 1;
+
+		/* Only write the LTR thresholds if they differ from before. */
+		ltrv = rd32(IGC_LTRMINV);
+		if (ltr_min != (ltrv & IGC_LTRMINV_LTRV_MASK)) {
+			ltrv = IGC_LTRMINV_LSNP_REQ | ltr_min |
+			       (scale_min << IGC_LTRMINV_SCALE_SHIFT);
+			wr32(IGC_LTRMINV, ltrv);
+		}
+
+		ltrv = rd32(IGC_LTRMAXV);
+		if (ltr_max != (ltrv & IGC_LTRMAXV_LTRV_MASK)) {
+			ltrv = IGC_LTRMAXV_LSNP_REQ | ltr_max |
+			       (scale_max << IGC_LTRMAXV_SCALE_SHIFT);
+			wr32(IGC_LTRMAXV, ltrv);
+		}
+	}
+
+	return IGC_SUCCESS;
+}