Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 2106 insertions, 0 deletions

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
new file mode 100644
index 000000000..fce9bc7be
--- /dev/null
+++ b/drivers/net/phy/phy.c
@@ -0,0 +1,2106 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* Framework for configuring and reading PHY devices
+ * Based on code in sungem_phy.c and gianfar_phy.c
+ *
+ * Author: Andy Fleming
+ *
+ * Copyright (c) 2004 Freescale Semiconductor, Inc.
+ * Copyright (c) 2006, 2007  Maciej W. Rozycki
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
+#include <linux/phy.h>
+#include <linux/phy_led_triggers.h>
+#include <linux/sfp.h>
+#include <linux/workqueue.h>
+#include <linux/mdio.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/suspend.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/sock.h>
+
+#include "phylib-internal.h"
+#include "phy-caps.h"
+
+#define PHY_STATE_TIME	HZ
+
+#define PHY_STATE_STR(_state)			\
+	case PHY_##_state:			\
+		return __stringify(_state);	\
+
+static const char *phy_state_to_str(enum phy_state st)
+{
+	switch (st) {
+	PHY_STATE_STR(DOWN)
+	PHY_STATE_STR(READY)
+	PHY_STATE_STR(UP)
+	PHY_STATE_STR(RUNNING)
+	PHY_STATE_STR(NOLINK)
+	PHY_STATE_STR(CABLETEST)
+	PHY_STATE_STR(HALTED)
+	PHY_STATE_STR(ERROR)
+	}
+
+	return NULL;
+}
+
+static void phy_process_state_change(struct phy_device *phydev,
+				     enum phy_state old_state)
+{
+	if (old_state != phydev->state) {
+		phydev_dbg(phydev, "PHY state change %s -> %s\n",
+			   phy_state_to_str(old_state),
+			   phy_state_to_str(phydev->state));
+		if (phydev->drv && phydev->drv->link_change_notify)
+			phydev->drv->link_change_notify(phydev);
+	}
+}
+
+static void phy_link_up(struct phy_device *phydev)
+{
+	phydev->phy_link_change(phydev, true);
+	phy_led_trigger_change_speed(phydev);
+}
+
+static void phy_link_down(struct phy_device *phydev)
+{
+	phydev->phy_link_change(phydev, false);
+	phy_led_trigger_change_speed(phydev);
+	WRITE_ONCE(phydev->link_down_events, phydev->link_down_events + 1);
+}
+
+static const char *phy_pause_str(struct phy_device *phydev)
+{
+	bool local_pause, local_asym_pause;
+
+	if (phydev->autoneg == AUTONEG_DISABLE)
+		goto no_pause;
+
+	local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+					phydev->advertising);
+	local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+					     phydev->advertising);
+
+	if (local_pause && phydev->pause)
+		return "rx/tx";
+
+	if (local_asym_pause && phydev->asym_pause) {
+		if (local_pause)
+			return "rx";
+		if (phydev->pause)
+			return "tx";
+	}
+
+no_pause:
+	return "off";
+}
+
+/**
+ * phy_print_status - Convenience function to print out the current phy status
+ * @phydev: the phy_device struct
+ */
+void phy_print_status(struct phy_device *phydev)
+{
+	if (phydev->link) {
+		netdev_info(phydev->attached_dev,
+			"Link is Up - %s/%s %s- flow control %s\n",
+			phy_speed_to_str(phydev->speed),
+			phy_duplex_to_str(phydev->duplex),
+			phydev->downshifted_rate ? "(downshifted) " : "",
+			phy_pause_str(phydev));
+	} else	{
+		netdev_info(phydev->attached_dev, "Link is Down\n");
+	}
+}
+EXPORT_SYMBOL(phy_print_status);
+
+/**
+ * phy_get_rate_matching - determine if rate matching is supported
+ * @phydev: The phy device to return rate matching for
+ * @iface: The interface mode to use
+ *
+ * This determines the type of rate matching (if any) that @phy supports
+ * using @iface. @iface may be %PHY_INTERFACE_MODE_NA to determine if any
+ * interface supports rate matching.
+ *
+ * Return: The type of rate matching @phy supports for @iface, or
+ *         %RATE_MATCH_NONE.
+ */
+int phy_get_rate_matching(struct phy_device *phydev,
+			  phy_interface_t iface)
+{
+	int ret = RATE_MATCH_NONE;
+
+	if (phydev->drv->get_rate_matching) {
+		mutex_lock(&phydev->lock);
+		ret = phydev->drv->get_rate_matching(phydev, iface);
+		mutex_unlock(&phydev->lock);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_get_rate_matching);
+
+/**
+ * phy_config_interrupt - configure the PHY device for the requested interrupts
+ * @phydev: the phy_device struct
+ * @interrupts: interrupt flags to configure for this @phydev
+ *
+ * Returns 0 on success or < 0 on error.
+ */
+static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
+{
+	phydev->interrupts = interrupts ? 1 : 0;
+	if (phydev->drv->config_intr)
+		return phydev->drv->config_intr(phydev);
+
+	return 0;
+}
+
+/**
+ * phy_restart_aneg - restart auto-negotiation
+ * @phydev: target phy_device struct
+ *
+ * Restart the autonegotiation on @phydev.  Returns >= 0 on success or
+ * negative errno on error.
+ */
+int phy_restart_aneg(struct phy_device *phydev)
+{
+	int ret;
+
+	if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
+		ret = genphy_c45_restart_aneg(phydev);
+	else
+		ret = genphy_restart_aneg(phydev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_restart_aneg);
+
+/**
+ * phy_aneg_done - return auto-negotiation status
+ * @phydev: target phy_device struct
+ *
+ * Description: Return the auto-negotiation status from this @phydev
+ * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
+ * is still pending.
+ */
+int phy_aneg_done(struct phy_device *phydev)
+{
+	if (phydev->drv && phydev->drv->aneg_done)
+		return phydev->drv->aneg_done(phydev);
+	else if (phydev->is_c45)
+		return genphy_c45_aneg_done(phydev);
+	else
+		return genphy_aneg_done(phydev);
+}
+EXPORT_SYMBOL(phy_aneg_done);
+
+/**
+ * phy_supported_speeds - return all speeds currently supported by a phy device
+ * @phy: The phy device to return supported speeds of.
+ * @speeds: buffer to store supported speeds in.
+ * @size:   size of speeds buffer.
+ *
+ * Description: Returns the number of supported speeds, and fills the speeds
+ * buffer with the supported speeds. If speeds buffer is too small to contain
+ * all currently supported speeds, will return as many speeds as can fit.
+ */
+unsigned int phy_supported_speeds(struct phy_device *phy,
+				  unsigned int *speeds,
+				  unsigned int size)
+{
+	return phy_caps_speeds(speeds, size, phy->supported);
+}
+
+/**
+ * phy_check_valid - check if there is a valid PHY setting which matches
+ *		     speed, duplex, and feature mask
+ * @speed: speed to match
+ * @duplex: duplex to match
+ * @features: A mask of the valid settings
+ *
+ * Description: Returns true if there is a valid setting, false otherwise.
+ */
+bool phy_check_valid(int speed, int duplex, unsigned long *features)
+{
+	return phy_caps_valid(speed, duplex, features);
+}
+EXPORT_SYMBOL(phy_check_valid);
+
+/**
+ * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
+ * @phydev: the target phy_device struct
+ *
+ * Description: Make sure the PHY is set to supported speeds and
+ *   duplexes.  Drop down by one in this order:  1000/FULL,
+ *   1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
+ */
+static void phy_sanitize_settings(struct phy_device *phydev)
+{
+	const struct link_capabilities *c;
+
+	c = phy_caps_lookup(phydev->speed, phydev->duplex, phydev->supported,
+			    false);
+
+	if (c) {
+		phydev->speed = c->speed;
+		phydev->duplex = c->duplex;
+	} else {
+		/* We failed to find anything (no supported speeds?) */
+		phydev->speed = SPEED_UNKNOWN;
+		phydev->duplex = DUPLEX_UNKNOWN;
+	}
+}
+
+void phy_ethtool_ksettings_get(struct phy_device *phydev,
+			       struct ethtool_link_ksettings *cmd)
+{
+	mutex_lock(&phydev->lock);
+	linkmode_copy(cmd->link_modes.supported, phydev->supported);
+	linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
+	linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
+
+	cmd->base.speed = phydev->speed;
+	cmd->base.duplex = phydev->duplex;
+	cmd->base.master_slave_cfg = phydev->master_slave_get;
+	cmd->base.master_slave_state = phydev->master_slave_state;
+	cmd->base.rate_matching = phydev->rate_matching;
+	if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
+		cmd->base.port = PORT_BNC;
+	else
+		cmd->base.port = phydev->port;
+	cmd->base.transceiver = phydev->is_internal ?
+				XCVR_INTERNAL : XCVR_EXTERNAL;
+	cmd->base.phy_address = phydev->mdio.addr;
+	cmd->base.autoneg = phydev->autoneg;
+	cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
+	cmd->base.eth_tp_mdix = phydev->mdix;
+	mutex_unlock(&phydev->lock);
+}
+EXPORT_SYMBOL(phy_ethtool_ksettings_get);
+
+/**
+ * phy_mii_ioctl - generic PHY MII ioctl interface
+ * @phydev: the phy_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ *
+ * Note that this function is currently incompatible with the
+ * PHYCONTROL layer.  It changes registers without regard to
+ * current state.  Use at own risk.
+ */
+int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
+{
+	struct mii_ioctl_data *mii_data = if_mii(ifr);
+	struct kernel_hwtstamp_config kernel_cfg;
+	struct netlink_ext_ack extack = {};
+	u16 val = mii_data->val_in;
+	bool change_autoneg = false;
+	struct hwtstamp_config cfg;
+	int prtad, devad;
+	int ret;
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+		mii_data->phy_id = phydev->mdio.addr;
+		fallthrough;
+
+	case SIOCGMIIREG:
+		if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+			prtad = mdio_phy_id_prtad(mii_data->phy_id);
+			devad = mdio_phy_id_devad(mii_data->phy_id);
+			ret = mdiobus_c45_read(phydev->mdio.bus, prtad, devad,
+					       mii_data->reg_num);
+
+		} else {
+			ret = mdiobus_read(phydev->mdio.bus, mii_data->phy_id,
+					   mii_data->reg_num);
+		}
+
+		if (ret < 0)
+			return ret;
+
+		mii_data->val_out = ret;
+
+		return 0;
+
+	case SIOCSMIIREG:
+		if (mdio_phy_id_is_c45(mii_data->phy_id)) {
+			prtad = mdio_phy_id_prtad(mii_data->phy_id);
+			devad = mdio_phy_id_devad(mii_data->phy_id);
+		} else {
+			prtad = mii_data->phy_id;
+			devad = mii_data->reg_num;
+		}
+		if (prtad == phydev->mdio.addr) {
+			switch (devad) {
+			case MII_BMCR:
+				if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
+					if (phydev->autoneg == AUTONEG_ENABLE)
+						change_autoneg = true;
+					phydev->autoneg = AUTONEG_DISABLE;
+					if (val & BMCR_FULLDPLX)
+						phydev->duplex = DUPLEX_FULL;
+					else
+						phydev->duplex = DUPLEX_HALF;
+					if (val & BMCR_SPEED1000)
+						phydev->speed = SPEED_1000;
+					else if (val & BMCR_SPEED100)
+						phydev->speed = SPEED_100;
+					else phydev->speed = SPEED_10;
+				} else {
+					if (phydev->autoneg == AUTONEG_DISABLE)
+						change_autoneg = true;
+					phydev->autoneg = AUTONEG_ENABLE;
+				}
+				break;
+			case MII_ADVERTISE:
+				mii_adv_mod_linkmode_adv_t(phydev->advertising,
+							   val);
+				change_autoneg = true;
+				break;
+			case MII_CTRL1000:
+				mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
+							        val);
+				change_autoneg = true;
+				break;
+			default:
+				/* do nothing */
+				break;
+			}
+		}
+
+		if (mdio_phy_id_is_c45(mii_data->phy_id))
+			mdiobus_c45_write(phydev->mdio.bus, prtad, devad,
+					  mii_data->reg_num, val);
+		else
+			mdiobus_write(phydev->mdio.bus, prtad, devad, val);
+
+		if (prtad == phydev->mdio.addr &&
+		    devad == MII_BMCR &&
+		    val & BMCR_RESET)
+			return phy_init_hw(phydev);
+
+		if (change_autoneg)
+			return phy_start_aneg(phydev);
+
+		return 0;
+
+	case SIOCSHWTSTAMP:
+		if (phydev->mii_ts && phydev->mii_ts->hwtstamp_set) {
+			if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
+				return -EFAULT;
+
+			hwtstamp_config_to_kernel(&kernel_cfg, &cfg);
+			ret = phydev->mii_ts->hwtstamp_set(phydev->mii_ts,
+							   &kernel_cfg,
+							   &extack);
+			if (ret)
+				return ret;
+
+			hwtstamp_config_from_kernel(&cfg, &kernel_cfg);
+			if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)))
+				return -EFAULT;
+
+			return 0;
+		}
+		fallthrough;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+EXPORT_SYMBOL(phy_mii_ioctl);
+
+/**
+ * phy_do_ioctl - generic ndo_eth_ioctl implementation
+ * @dev: the net_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ */
+int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	if (!dev->phydev)
+		return -ENODEV;
+
+	return phy_mii_ioctl(dev->phydev, ifr, cmd);
+}
+EXPORT_SYMBOL(phy_do_ioctl);
+
+/**
+ * phy_do_ioctl_running - generic ndo_eth_ioctl implementation but test first
+ *
+ * @dev: the net_device struct
+ * @ifr: &struct ifreq for socket ioctl's
+ * @cmd: ioctl cmd to execute
+ *
+ * Same as phy_do_ioctl, but ensures that net_device is running before
+ * handling the ioctl.
+ */
+int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	if (!netif_running(dev))
+		return -ENODEV;
+
+	return phy_do_ioctl(dev, ifr, cmd);
+}
+EXPORT_SYMBOL(phy_do_ioctl_running);
+
+/**
+ * __phy_hwtstamp_get - Get hardware timestamping configuration from PHY
+ *
+ * @phydev: the PHY device structure
+ * @config: structure holding the timestamping configuration
+ *
+ * Query the PHY device for its current hardware timestamping configuration.
+ */
+int __phy_hwtstamp_get(struct phy_device *phydev,
+		       struct kernel_hwtstamp_config *config)
+{
+	if (!phydev)
+		return -ENODEV;
+
+	if (phydev->mii_ts && phydev->mii_ts->hwtstamp_get)
+		return phydev->mii_ts->hwtstamp_get(phydev->mii_ts, config);
+
+	return -EOPNOTSUPP;
+}
+
+/**
+ * __phy_hwtstamp_set - Modify PHY hardware timestamping configuration
+ *
+ * @phydev: the PHY device structure
+ * @config: structure holding the timestamping configuration
+ * @extack: netlink extended ack structure, for error reporting
+ */
+int __phy_hwtstamp_set(struct phy_device *phydev,
+		       struct kernel_hwtstamp_config *config,
+		       struct netlink_ext_ack *extack)
+{
+	if (!phydev)
+		return -ENODEV;
+
+	if (phydev->mii_ts && phydev->mii_ts->hwtstamp_set)
+		return phydev->mii_ts->hwtstamp_set(phydev->mii_ts, config,
+						    extack);
+
+	return -EOPNOTSUPP;
+}
+
+/**
+ * phy_queue_state_machine - Trigger the state machine to run soon
+ *
+ * @phydev: the phy_device struct
+ * @jiffies: Run the state machine after these jiffies
+ */
+static void phy_queue_state_machine(struct phy_device *phydev,
+				    unsigned long jiffies)
+{
+	mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
+			 jiffies);
+}
+
+/**
+ * phy_trigger_machine - Trigger the state machine to run now
+ *
+ * @phydev: the phy_device struct
+ */
+void phy_trigger_machine(struct phy_device *phydev)
+{
+	phy_queue_state_machine(phydev, 0);
+}
+EXPORT_SYMBOL(phy_trigger_machine);
+
+static void phy_abort_cable_test(struct phy_device *phydev)
+{
+	int err;
+
+	ethnl_cable_test_finished(phydev);
+
+	err = phy_init_hw(phydev);
+	if (err)
+		phydev_err(phydev, "Error while aborting cable test");
+}
+
+/**
+ * phy_ethtool_get_strings - Get the statistic counter names
+ *
+ * @phydev: the phy_device struct
+ * @data: Where to put the strings
+ */
+int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
+{
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_strings(phydev, data);
+	mutex_unlock(&phydev->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_strings);
+
+/**
+ * phy_ethtool_get_sset_count - Get the number of statistic counters
+ *
+ * @phydev: the phy_device struct
+ */
+int phy_ethtool_get_sset_count(struct phy_device *phydev)
+{
+	int ret;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	if (phydev->drv->get_sset_count &&
+	    phydev->drv->get_strings &&
+	    phydev->drv->get_stats) {
+		mutex_lock(&phydev->lock);
+		ret = phydev->drv->get_sset_count(phydev);
+		mutex_unlock(&phydev->lock);
+
+		return ret;
+	}
+
+	return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(phy_ethtool_get_sset_count);
+
+/**
+ * phy_ethtool_get_stats - Get the statistic counters
+ *
+ * @phydev: the phy_device struct
+ * @stats: What counters to get
+ * @data: Where to store the counters
+ */
+int phy_ethtool_get_stats(struct phy_device *phydev,
+			  struct ethtool_stats *stats, u64 *data)
+{
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_stats(phydev, stats, data);
+	mutex_unlock(&phydev->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_stats);
+
+/**
+ * __phy_ethtool_get_phy_stats - Retrieve standardized PHY statistics
+ * @phydev: Pointer to the PHY device
+ * @phy_stats: Pointer to ethtool_eth_phy_stats structure
+ * @phydev_stats: Pointer to ethtool_phy_stats structure
+ *
+ * Fetches PHY statistics using a kernel-defined interface for consistent
+ * diagnostics. Unlike phy_ethtool_get_stats(), which allows custom stats,
+ * this function enforces a standardized format for better interoperability.
+ */
+void __phy_ethtool_get_phy_stats(struct phy_device *phydev,
+				 struct ethtool_eth_phy_stats *phy_stats,
+				 struct ethtool_phy_stats *phydev_stats)
+{
+	if (!phydev->drv || !phydev->drv->get_phy_stats)
+		return;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_phy_stats(phydev, phy_stats, phydev_stats);
+	mutex_unlock(&phydev->lock);
+}
+
+/**
+ * __phy_ethtool_get_link_ext_stats - Retrieve extended link statistics for a PHY
+ * @phydev: Pointer to the PHY device
+ * @link_stats: Pointer to the structure to store extended link statistics
+ *
+ * Populates the ethtool_link_ext_stats structure with link down event counts
+ * and additional driver-specific link statistics, if available.
+ */
+void __phy_ethtool_get_link_ext_stats(struct phy_device *phydev,
+				      struct ethtool_link_ext_stats *link_stats)
+{
+	link_stats->link_down_events = READ_ONCE(phydev->link_down_events);
+
+	if (!phydev->drv || !phydev->drv->get_link_stats)
+		return;
+
+	mutex_lock(&phydev->lock);
+	phydev->drv->get_link_stats(phydev, link_stats);
+	mutex_unlock(&phydev->lock);
+}
+
+/**
+ * phy_ethtool_get_plca_cfg - Get PLCA RS configuration
+ * @phydev: the phy_device struct
+ * @plca_cfg: where to store the retrieved configuration
+ *
+ * Retrieve the PLCA configuration from the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_get_plca_cfg(struct phy_device *phydev,
+			     struct phy_plca_cfg *plca_cfg)
+{
+	int ret;
+
+	if (!phydev->drv) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (!phydev->drv->get_plca_cfg) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	mutex_lock(&phydev->lock);
+	ret = phydev->drv->get_plca_cfg(phydev, plca_cfg);
+
+	mutex_unlock(&phydev->lock);
+out:
+	return ret;
+}
+
+/**
+ * plca_check_valid - Check PLCA configuration before enabling
+ * @phydev: the phy_device struct
+ * @plca_cfg: current PLCA configuration
+ * @extack: extack for reporting useful error messages
+ *
+ * Checks whether the PLCA and PHY configuration are consistent and it is safe
+ * to enable PLCA. Returns 0 on success or a negative value if the PLCA or PHY
+ * configuration is not consistent.
+ */
+static int plca_check_valid(struct phy_device *phydev,
+			    const struct phy_plca_cfg *plca_cfg,
+			    struct netlink_ext_ack *extack)
+{
+	int ret = 0;
+
+	if (!linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
+			       phydev->advertising)) {
+		ret = -EOPNOTSUPP;
+		NL_SET_ERR_MSG(extack,
+			       "Point to Multi-Point mode is not enabled");
+	} else if (plca_cfg->node_id >= 255) {
+		NL_SET_ERR_MSG(extack, "PLCA node ID is not set");
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+/**
+ * phy_ethtool_set_plca_cfg - Set PLCA RS configuration
+ * @phydev: the phy_device struct
+ * @plca_cfg: new PLCA configuration to apply
+ * @extack: extack for reporting useful error messages
+ *
+ * Sets the PLCA configuration in the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_set_plca_cfg(struct phy_device *phydev,
+			     const struct phy_plca_cfg *plca_cfg,
+			     struct netlink_ext_ack *extack)
+{
+	struct phy_plca_cfg *curr_plca_cfg;
+	int ret;
+
+	if (!phydev->drv) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (!phydev->drv->set_plca_cfg ||
+	    !phydev->drv->get_plca_cfg) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	curr_plca_cfg = kmalloc_obj(*curr_plca_cfg);
+	if (!curr_plca_cfg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	mutex_lock(&phydev->lock);
+
+	ret = phydev->drv->get_plca_cfg(phydev, curr_plca_cfg);
+	if (ret)
+		goto out_drv;
+
+	if (curr_plca_cfg->enabled < 0 && plca_cfg->enabled >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'enable' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	if (curr_plca_cfg->node_id < 0 && plca_cfg->node_id >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'local node ID' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	if (curr_plca_cfg->node_cnt < 0 && plca_cfg->node_cnt >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'node count' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	if (curr_plca_cfg->to_tmr < 0 && plca_cfg->to_tmr >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'TO timer' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	if (curr_plca_cfg->burst_cnt < 0 && plca_cfg->burst_cnt >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'burst count' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	if (curr_plca_cfg->burst_tmr < 0 && plca_cfg->burst_tmr >= 0) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY does not support changing the PLCA 'burst timer' attribute");
+		ret = -EINVAL;
+		goto out_drv;
+	}
+
+	// if enabling PLCA, perform a few sanity checks
+	if (plca_cfg->enabled > 0) {
+		// allow setting node_id concurrently with enabled
+		if (plca_cfg->node_id >= 0)
+			curr_plca_cfg->node_id = plca_cfg->node_id;
+
+		ret = plca_check_valid(phydev, curr_plca_cfg, extack);
+		if (ret)
+			goto out_drv;
+	}
+
+	ret = phydev->drv->set_plca_cfg(phydev, plca_cfg);
+
+out_drv:
+	kfree(curr_plca_cfg);
+	mutex_unlock(&phydev->lock);
+out:
+	return ret;
+}
+
+/**
+ * phy_ethtool_get_plca_status - Get PLCA RS status information
+ * @phydev: the phy_device struct
+ * @plca_st: where to store the retrieved status information
+ *
+ * Retrieve the PLCA status information from the PHY. Return 0 on success or a
+ * negative value if an error occurred.
+ */
+int phy_ethtool_get_plca_status(struct phy_device *phydev,
+				struct phy_plca_status *plca_st)
+{
+	int ret;
+
+	if (!phydev->drv) {
+		ret = -EIO;
+		goto out;
+	}
+
+	if (!phydev->drv->get_plca_status) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
+
+	mutex_lock(&phydev->lock);
+	ret = phydev->drv->get_plca_status(phydev, plca_st);
+
+	mutex_unlock(&phydev->lock);
+out:
+	return ret;
+}
+
+/**
+ * phy_start_cable_test - Start a cable test
+ *
+ * @phydev: the phy_device struct
+ * @extack: extack for reporting useful error messages
+ */
+int phy_start_cable_test(struct phy_device *phydev,
+			 struct netlink_ext_ack *extack)
+{
+	struct net_device *dev = phydev->attached_dev;
+	int err = -ENOMEM;
+
+	if (!(phydev->drv &&
+	      phydev->drv->cable_test_start &&
+	      phydev->drv->cable_test_get_status)) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY driver does not support cable testing");
+		return -EOPNOTSUPP;
+	}
+
+	mutex_lock(&phydev->lock);
+	if (phydev->state == PHY_CABLETEST) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY already performing a test");
+		err = -EBUSY;
+		goto out;
+	}
+
+	if (phydev->state < PHY_UP ||
+	    phydev->state > PHY_CABLETEST) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY not configured. Try setting interface up");
+		err = -EBUSY;
+		goto out;
+	}
+
+	err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
+	if (err)
+		goto out;
+
+	/* Mark the carrier down until the test is complete */
+	phy_link_down(phydev);
+
+	netif_testing_on(dev);
+	err = phydev->drv->cable_test_start(phydev);
+	if (err) {
+		netif_testing_off(dev);
+		phy_link_up(phydev);
+		goto out_free;
+	}
+
+	phydev->state = PHY_CABLETEST;
+
+	if (phy_polling_mode(phydev))
+		phy_trigger_machine(phydev);
+
+	mutex_unlock(&phydev->lock);
+
+	return 0;
+
+out_free:
+	ethnl_cable_test_free(phydev);
+out:
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+EXPORT_SYMBOL(phy_start_cable_test);
+
+/**
+ * phy_start_cable_test_tdr - Start a raw TDR cable test
+ *
+ * @phydev: the phy_device struct
+ * @extack: extack for reporting useful error messages
+ * @config: Configuration of the test to run
+ */
+int phy_start_cable_test_tdr(struct phy_device *phydev,
+			     struct netlink_ext_ack *extack,
+			     const struct phy_tdr_config *config)
+{
+	struct net_device *dev = phydev->attached_dev;
+	int err = -ENOMEM;
+
+	if (!(phydev->drv &&
+	      phydev->drv->cable_test_tdr_start &&
+	      phydev->drv->cable_test_get_status)) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY driver does not support cable test TDR");
+		return -EOPNOTSUPP;
+	}
+
+	mutex_lock(&phydev->lock);
+	if (phydev->state == PHY_CABLETEST) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY already performing a test");
+		err = -EBUSY;
+		goto out;
+	}
+
+	if (phydev->state < PHY_UP ||
+	    phydev->state > PHY_CABLETEST) {
+		NL_SET_ERR_MSG(extack,
+			       "PHY not configured. Try setting interface up");
+		err = -EBUSY;
+		goto out;
+	}
+
+	err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
+	if (err)
+		goto out;
+
+	/* Mark the carrier down until the test is complete */
+	phy_link_down(phydev);
+
+	netif_testing_on(dev);
+	err = phydev->drv->cable_test_tdr_start(phydev, config);
+	if (err) {
+		netif_testing_off(dev);
+		phy_link_up(phydev);
+		goto out_free;
+	}
+
+	phydev->state = PHY_CABLETEST;
+
+	if (phy_polling_mode(phydev))
+		phy_trigger_machine(phydev);
+
+	mutex_unlock(&phydev->lock);
+
+	return 0;
+
+out_free:
+	ethnl_cable_test_free(phydev);
+out:
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+EXPORT_SYMBOL(phy_start_cable_test_tdr);
+
+int phy_config_aneg(struct phy_device *phydev)
+{
+	if (phydev->drv->config_aneg)
+		return phydev->drv->config_aneg(phydev);
+
+	/* Clause 45 PHYs that don't implement Clause 22 registers are not
+	 * allowed to call genphy_config_aneg()
+	 */
+	if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
+		return genphy_c45_config_aneg(phydev);
+
+	return genphy_config_aneg(phydev);
+}
+EXPORT_SYMBOL(phy_config_aneg);
+
+/**
+ * phy_check_link_status - check link status and set state accordingly
+ * @phydev: the phy_device struct
+ *
+ * Description: Check for link and whether autoneg was triggered / is running
+ * and set state accordingly
+ */
+static int phy_check_link_status(struct phy_device *phydev)
+{
+	int err;
+
+	lockdep_assert_held(&phydev->lock);
+
+	/* Keep previous state if loopback is enabled because some PHYs
+	 * report that Link is Down when loopback is enabled.
+	 */
+	if (phydev->loopback_enabled)
+		return 0;
+
+	err = phy_read_status(phydev);
+	if (err)
+		return err;
+
+	if (phydev->link && phydev->state != PHY_RUNNING) {
+		phy_check_downshift(phydev);
+		phydev->state = PHY_RUNNING;
+		err = genphy_c45_eee_is_active(phydev, NULL);
+		phydev->eee_active = err > 0;
+		phydev->enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled &&
+					phydev->eee_active;
+
+		phy_link_up(phydev);
+	} else if (!phydev->link && phydev->state != PHY_NOLINK) {
+		phydev->state = PHY_NOLINK;
+		phydev->eee_active = false;
+		phydev->enable_tx_lpi = false;
+		phy_link_down(phydev);
+	}
+
+	return 0;
+}
+
+/**
+ * phy_inband_caps - query which in-band signalling modes are supported
+ * @phydev: a pointer to a &struct phy_device
+ * @interface: the interface mode for the PHY
+ *
+ * Returns zero if it is unknown what in-band signalling is supported by the
+ * PHY (e.g. because the PHY driver doesn't implement the method.) Otherwise,
+ * returns a bit mask of the LINK_INBAND_* values from
+ * &enum link_inband_signalling to describe which inband modes are supported
+ * by the PHY for this interface mode.
+ */
+unsigned int phy_inband_caps(struct phy_device *phydev,
+			     phy_interface_t interface)
+{
+	if (phydev->drv && phydev->drv->inband_caps)
+		return phydev->drv->inband_caps(phydev, interface);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(phy_inband_caps);
+
+/**
+ * phy_config_inband - configure the desired PHY in-band mode
+ * @phydev: the phy_device struct
+ * @modes: in-band modes to configure
+ *
+ * Description: disables, enables or enables-with-bypass in-band signalling
+ *   between the PHY and host system.
+ *
+ * Returns: zero on success, or negative errno value.
+ */
+int phy_config_inband(struct phy_device *phydev, unsigned int modes)
+{
+	lockdep_assert_held(&phydev->lock);
+
+	if (!!(modes & LINK_INBAND_DISABLE) +
+	    !!(modes & LINK_INBAND_ENABLE) +
+	    !!(modes & LINK_INBAND_BYPASS) != 1)
+		return -EINVAL;
+
+	if (!phydev->drv)
+		return -EIO;
+	else if (!phydev->drv->config_inband)
+		return -EOPNOTSUPP;
+
+	return phydev->drv->config_inband(phydev, modes);
+}
+EXPORT_SYMBOL(phy_config_inband);
+
+/**
+ * _phy_start_aneg - start auto-negotiation for this PHY device
+ * @phydev: the phy_device struct
+ *
+ * Description: Sanitizes the settings (if we're not autonegotiating
+ *   them), and then calls the driver's config_aneg function.
+ *   If the PHYCONTROL Layer is operating, we change the state to
+ *   reflect the beginning of Auto-negotiation or forcing.
+ */
+int _phy_start_aneg(struct phy_device *phydev)
+{
+	int err;
+
+	lockdep_assert_held(&phydev->lock);
+
+	if (!phydev->drv)
+		return -EIO;
+
+	if (AUTONEG_DISABLE == phydev->autoneg)
+		phy_sanitize_settings(phydev);
+
+	err = phy_config_aneg(phydev);
+	if (err < 0)
+		return err;
+
+	if (phy_is_started(phydev))
+		err = phy_check_link_status(phydev);
+
+	return err;
+}
+EXPORT_SYMBOL(_phy_start_aneg);
+
+/**
+ * phy_start_aneg - start auto-negotiation for this PHY device
+ * @phydev: the phy_device struct
+ *
+ * Description: Sanitizes the settings (if we're not autonegotiating
+ *   them), and then calls the driver's config_aneg function.
+ *   If the PHYCONTROL Layer is operating, we change the state to
+ *   reflect the beginning of Auto-negotiation or forcing.
+ */
+int phy_start_aneg(struct phy_device *phydev)
+{
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = _phy_start_aneg(phydev);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+EXPORT_SYMBOL(phy_start_aneg);
+
+static int phy_poll_aneg_done(struct phy_device *phydev)
+{
+	unsigned int retries = 100;
+	int ret;
+
+	do {
+		msleep(100);
+		ret = phy_aneg_done(phydev);
+	} while (!ret && --retries);
+
+	if (!ret)
+		return -ETIMEDOUT;
+
+	return ret < 0 ? ret : 0;
+}
+
+int phy_ethtool_ksettings_set(struct phy_device *phydev,
+			      const struct ethtool_link_ksettings *cmd)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
+	u8 autoneg = cmd->base.autoneg;
+	u8 duplex = cmd->base.duplex;
+	u32 speed = cmd->base.speed;
+
+	if (cmd->base.phy_address != phydev->mdio.addr)
+		return -EINVAL;
+
+	linkmode_copy(advertising, cmd->link_modes.advertising);
+
+	/* We make sure that we don't pass unsupported values in to the PHY */
+	linkmode_and(advertising, advertising, phydev->supported);
+
+	/* Verify the settings we care about. */
+	if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
+		return -EINVAL;
+
+	if (autoneg == AUTONEG_ENABLE &&
+	    (linkmode_empty(advertising) ||
+	     !linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+				phydev->supported)))
+		return -EINVAL;
+
+	if (autoneg == AUTONEG_DISABLE &&
+	    ((speed != SPEED_1000 &&
+	      speed != SPEED_100 &&
+	      speed != SPEED_10) ||
+	     (duplex != DUPLEX_HALF &&
+	      duplex != DUPLEX_FULL)))
+		return -EINVAL;
+
+	mutex_lock(&phydev->lock);
+	phydev->autoneg = autoneg;
+
+	if (autoneg == AUTONEG_DISABLE) {
+		phydev->speed = speed;
+		phydev->duplex = duplex;
+	}
+
+	linkmode_copy(phydev->advertising, advertising);
+
+	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+			 phydev->advertising, autoneg == AUTONEG_ENABLE);
+
+	phydev->master_slave_set = cmd->base.master_slave_cfg;
+	phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
+
+	/* Restart the PHY */
+	if (phy_is_started(phydev)) {
+		phydev->state = PHY_UP;
+		phy_trigger_machine(phydev);
+	} else {
+		_phy_start_aneg(phydev);
+	}
+
+	mutex_unlock(&phydev->lock);
+	return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_ksettings_set);
+
+/**
+ * phy_speed_down - set speed to lowest speed supported by both link partners
+ * @phydev: the phy_device struct
+ * @sync: perform action synchronously
+ *
+ * Description: Typically used to save energy when waiting for a WoL packet
+ *
+ * WARNING: Setting sync to false may cause the system being unable to suspend
+ * in case the PHY generates an interrupt when finishing the autonegotiation.
+ * This interrupt may wake up the system immediately after suspend.
+ * Therefore use sync = false only if you're sure it's safe with the respective
+ * network chip.
+ */
+int phy_speed_down(struct phy_device *phydev, bool sync)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
+	int ret = 0;
+
+	mutex_lock(&phydev->lock);
+
+	if (phydev->autoneg != AUTONEG_ENABLE)
+		goto out;
+
+	linkmode_copy(adv_tmp, phydev->advertising);
+
+	ret = phy_speed_down_core(phydev);
+	if (ret)
+		goto out;
+
+	linkmode_copy(phydev->adv_old, adv_tmp);
+
+	if (linkmode_equal(phydev->advertising, adv_tmp)) {
+		ret = 0;
+		goto out;
+	}
+
+	ret = phy_config_aneg(phydev);
+	if (ret)
+		goto out;
+
+	ret = sync ? phy_poll_aneg_done(phydev) : 0;
+out:
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_speed_down);
+
+/**
+ * phy_speed_up - (re)set advertised speeds to all supported speeds
+ * @phydev: the phy_device struct
+ *
+ * Description: Used to revert the effect of phy_speed_down
+ */
+int phy_speed_up(struct phy_device *phydev)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
+	int ret = 0;
+
+	mutex_lock(&phydev->lock);
+
+	if (phydev->autoneg != AUTONEG_ENABLE)
+		goto out;
+
+	if (linkmode_empty(phydev->adv_old))
+		goto out;
+
+	linkmode_copy(adv_tmp, phydev->advertising);
+	linkmode_copy(phydev->advertising, phydev->adv_old);
+	linkmode_zero(phydev->adv_old);
+
+	if (linkmode_equal(phydev->advertising, adv_tmp))
+		goto out;
+
+	ret = phy_config_aneg(phydev);
+out:
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(phy_speed_up);
+
+/**
+ * phy_start_machine - start PHY state machine tracking
+ * @phydev: the phy_device struct
+ *
+ * Description: The PHY infrastructure can run a state machine
+ *   which tracks whether the PHY is starting up, negotiating,
+ *   etc.  This function starts the delayed workqueue which tracks
+ *   the state of the PHY. If you want to maintain your own state machine,
+ *   do not call this function.
+ */
+void phy_start_machine(struct phy_device *phydev)
+{
+	phy_trigger_machine(phydev);
+}
+EXPORT_SYMBOL_GPL(phy_start_machine);
+
+/**
+ * phy_stop_machine - stop the PHY state machine tracking
+ * @phydev: target phy_device struct
+ *
+ * Description: Stops the state machine delayed workqueue, sets the
+ *   state to UP (unless it wasn't up yet). This function must be
+ *   called BEFORE phy_detach.
+ */
+void phy_stop_machine(struct phy_device *phydev)
+{
+	cancel_delayed_work_sync(&phydev->state_queue);
+
+	mutex_lock(&phydev->lock);
+	if (phy_is_started(phydev))
+		phydev->state = PHY_UP;
+	mutex_unlock(&phydev->lock);
+}
+
+static void phy_process_error(struct phy_device *phydev)
+{
+	/* phydev->lock must be held for the state change to be safe */
+	if (!mutex_is_locked(&phydev->lock))
+		phydev_err(phydev, "PHY-device data unsafe context\n");
+
+	phydev->state = PHY_ERROR;
+
+	phy_trigger_machine(phydev);
+}
+
+static void phy_error_precise(struct phy_device *phydev,
+			      const void *func, int err)
+{
+	WARN(1, "%pS: returned: %d\n", func, err);
+	phy_process_error(phydev);
+}
+
+/**
+ * phy_error - enter ERROR state for this PHY device
+ * @phydev: target phy_device struct
+ *
+ * Moves the PHY to the ERROR state in response to a read
+ * or write error, and tells the controller the link is down.
+ * Must be called with phydev->lock held.
+ */
+void phy_error(struct phy_device *phydev)
+{
+	WARN_ON(1);
+	phy_process_error(phydev);
+}
+EXPORT_SYMBOL(phy_error);
+
+/**
+ * phy_write_barrier - ensure the last write completed for this PHY device
+ * @phydev: target phy_device struct
+ *
+ * MDIO bus controllers are not required to wait for write transactions to
+ * complete before returning. Calling this function ensures that the previous
+ * write has completed.
+ */
+static void phy_write_barrier(struct phy_device *phydev)
+{
+	if (mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, MII_PHYSID1) ==
+	    -EOPNOTSUPP)
+		mdiobus_c45_read(phydev->mdio.bus, phydev->mdio.addr,
+				 MDIO_MMD_PMAPMD, MII_PHYSID1);
+}
+
+/**
+ * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
+ * @phydev: target phy_device struct
+ */
+int phy_disable_interrupts(struct phy_device *phydev)
+{
+	int err;
+
+	/* Disable PHY interrupts */
+	err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
+	if (err)
+		return err;
+
+	phy_write_barrier(phydev);
+	return 0;
+}
+
+/**
+ * phy_interrupt - PHY interrupt handler
+ * @irq: interrupt line
+ * @phy_dat: phy_device pointer
+ *
+ * Description: Handle PHY interrupt
+ */
+static irqreturn_t phy_interrupt(int irq, void *phy_dat)
+{
+	struct phy_device *phydev = phy_dat;
+	irqreturn_t ret;
+
+	/* Wakeup interrupts may occur during a system sleep transition.
+	 * Postpone handling until the PHY has resumed.
+	 */
+	if (IS_ENABLED(CONFIG_PM_SLEEP) && phydev->irq_suspended) {
+		struct net_device *netdev = phydev->attached_dev;
+
+		if (netdev) {
+			struct device *parent = netdev->dev.parent;
+
+			if (netdev->ethtool->wol_enabled)
+				pm_system_wakeup();
+			else if (device_may_wakeup(&netdev->dev))
+				pm_wakeup_dev_event(&netdev->dev, 0, true);
+			else if (parent && device_may_wakeup(parent))
+				pm_wakeup_dev_event(parent, 0, true);
+		}
+
+		phydev->irq_rerun = 1;
+		disable_irq_nosync(irq);
+		return IRQ_HANDLED;
+	}
+
+	mutex_lock(&phydev->lock);
+	ret = phydev->drv->handle_interrupt(phydev);
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+
+/**
+ * phy_enable_interrupts - Enable the interrupts from the PHY side
+ * @phydev: target phy_device struct
+ */
+static int phy_enable_interrupts(struct phy_device *phydev)
+{
+	return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
+}
+
+/**
+ * phy_update_stats - Update PHY device statistics if supported.
+ * @phydev: Pointer to the PHY device structure.
+ *
+ * If the PHY driver provides an update_stats callback, this function
+ * invokes it to update the PHY statistics. If not, it returns 0.
+ *
+ * Return: 0 on success, or a negative error code if the callback fails.
+ */
+static int phy_update_stats(struct phy_device *phydev)
+{
+	if (!phydev->drv->update_stats)
+		return 0;
+
+	return phydev->drv->update_stats(phydev);
+}
+
+/**
+ * phy_request_interrupt - request and enable interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Request and enable the interrupt for the given PHY.
+ *   If this fails, then we set irq to PHY_POLL.
+ *   This should only be called with a valid IRQ number.
+ */
+void phy_request_interrupt(struct phy_device *phydev)
+{
+	int err;
+
+	err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
+				   IRQF_ONESHOT | IRQF_SHARED,
+				   phydev_name(phydev), phydev);
+	if (err) {
+		phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
+			    err, phydev->irq);
+		phydev->irq = PHY_POLL;
+	} else {
+		if (phy_enable_interrupts(phydev)) {
+			phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
+			phy_free_interrupt(phydev);
+			phydev->irq = PHY_POLL;
+		}
+	}
+}
+EXPORT_SYMBOL(phy_request_interrupt);
+
+/**
+ * phy_free_interrupt - disable and free interrupt for a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Disable and free the interrupt for the given PHY.
+ *   This should only be called with a valid IRQ number.
+ */
+void phy_free_interrupt(struct phy_device *phydev)
+{
+	phy_disable_interrupts(phydev);
+	free_irq(phydev->irq, phydev);
+}
+EXPORT_SYMBOL(phy_free_interrupt);
+
+/**
+ * phy_get_next_update_time - Determine the next PHY update time
+ * @phydev: Pointer to the phy_device structure
+ *
+ * This function queries the PHY driver to get the time for the next polling
+ * event. If the driver does not implement the callback, a default value is
+ * used.
+ *
+ * Return: The time for the next polling event in jiffies
+ */
+static unsigned int phy_get_next_update_time(struct phy_device *phydev)
+{
+	if (phydev->drv && phydev->drv->get_next_update_time)
+		return phydev->drv->get_next_update_time(phydev);
+
+	return PHY_STATE_TIME;
+}
+
+enum phy_state_work {
+	PHY_STATE_WORK_NONE,
+	PHY_STATE_WORK_ANEG,
+	PHY_STATE_WORK_SUSPEND,
+};
+
+static enum phy_state_work _phy_state_machine(struct phy_device *phydev)
+{
+	enum phy_state_work state_work = PHY_STATE_WORK_NONE;
+	struct net_device *dev = phydev->attached_dev;
+	enum phy_state old_state = phydev->state;
+	const void *func = NULL;
+	bool finished = false;
+	int err = 0;
+
+	switch (phydev->state) {
+	case PHY_DOWN:
+	case PHY_READY:
+		break;
+	case PHY_UP:
+		state_work = PHY_STATE_WORK_ANEG;
+		break;
+	case PHY_NOLINK:
+	case PHY_RUNNING:
+		err = phy_check_link_status(phydev);
+		func = &phy_check_link_status;
+
+		if (!err)
+			err = phy_update_stats(phydev);
+		break;
+	case PHY_CABLETEST:
+		err = phydev->drv->cable_test_get_status(phydev, &finished);
+		if (err) {
+			phy_abort_cable_test(phydev);
+			netif_testing_off(dev);
+			state_work = PHY_STATE_WORK_ANEG;
+			phydev->state = PHY_UP;
+			break;
+		}
+
+		if (finished) {
+			ethnl_cable_test_finished(phydev);
+			netif_testing_off(dev);
+			state_work = PHY_STATE_WORK_ANEG;
+			phydev->state = PHY_UP;
+		}
+		break;
+	case PHY_HALTED:
+		if (phydev->link) {
+			if (phydev->autoneg == AUTONEG_ENABLE) {
+				phydev->speed = SPEED_UNKNOWN;
+				phydev->duplex = DUPLEX_UNKNOWN;
+			}
+			if (phydev->master_slave_state !=
+						MASTER_SLAVE_STATE_UNSUPPORTED)
+				phydev->master_slave_state =
+						MASTER_SLAVE_STATE_UNKNOWN;
+			phydev->mdix = ETH_TP_MDI_INVALID;
+			linkmode_zero(phydev->lp_advertising);
+		}
+		fallthrough;
+	case PHY_ERROR:
+		if (phydev->link) {
+			phydev->link = 0;
+			phydev->eee_active = false;
+			phydev->enable_tx_lpi = false;
+			phy_link_down(phydev);
+		}
+		state_work = PHY_STATE_WORK_SUSPEND;
+		break;
+	}
+
+	if (state_work == PHY_STATE_WORK_ANEG) {
+		err = _phy_start_aneg(phydev);
+		func = &_phy_start_aneg;
+	}
+
+	if (err == -ENODEV)
+		return state_work;
+
+	if (err < 0)
+		phy_error_precise(phydev, func, err);
+
+	phy_process_state_change(phydev, old_state);
+
+	/* Only re-schedule a PHY state machine change if we are polling the
+	 * PHY, if PHY_MAC_INTERRUPT is set, then we will be moving
+	 * between states from phy_mac_interrupt().
+	 *
+	 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
+	 * state machine would be pointless and possibly error prone when
+	 * called from phy_disconnect() synchronously.
+	 */
+	if (phy_polling_mode(phydev) && phy_is_started(phydev))
+		phy_queue_state_machine(phydev,
+					phy_get_next_update_time(phydev));
+
+	return state_work;
+}
+
+/* unlocked part of the PHY state machine */
+static void _phy_state_machine_post_work(struct phy_device *phydev,
+					 enum phy_state_work state_work)
+{
+	if (state_work == PHY_STATE_WORK_SUSPEND)
+		phy_suspend(phydev);
+}
+
+/**
+ * phy_state_machine - Handle the state machine
+ * @work: work_struct that describes the work to be done
+ */
+void phy_state_machine(struct work_struct *work)
+{
+	struct delayed_work *dwork = to_delayed_work(work);
+	struct phy_device *phydev =
+			container_of(dwork, struct phy_device, state_queue);
+	enum phy_state_work state_work;
+
+	mutex_lock(&phydev->lock);
+	state_work = _phy_state_machine(phydev);
+	mutex_unlock(&phydev->lock);
+
+	_phy_state_machine_post_work(phydev, state_work);
+}
+
+/**
+ * phy_stop - Bring down the PHY link, and stop checking the status
+ * @phydev: target phy_device struct
+ */
+void phy_stop(struct phy_device *phydev)
+{
+	struct net_device *dev = phydev->attached_dev;
+	enum phy_state_work state_work;
+	enum phy_state old_state;
+
+	if (!phy_is_started(phydev) && phydev->state != PHY_DOWN &&
+	    phydev->state != PHY_ERROR) {
+		WARN(1, "called from state %s\n",
+		     phy_state_to_str(phydev->state));
+		return;
+	}
+
+	mutex_lock(&phydev->lock);
+	old_state = phydev->state;
+
+	if (phydev->state == PHY_CABLETEST) {
+		phy_abort_cable_test(phydev);
+		netif_testing_off(dev);
+	}
+
+	if (phydev->sfp_bus)
+		sfp_upstream_stop(phydev->sfp_bus);
+
+	phydev->state = PHY_HALTED;
+	phy_process_state_change(phydev, old_state);
+
+	state_work = _phy_state_machine(phydev);
+	mutex_unlock(&phydev->lock);
+
+	_phy_state_machine_post_work(phydev, state_work);
+	phy_stop_machine(phydev);
+
+	/* Cannot call flush_scheduled_work() here as desired because
+	 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
+	 * will not reenable interrupts.
+	 */
+}
+EXPORT_SYMBOL(phy_stop);
+
+/**
+ * phy_start - start or restart a PHY device
+ * @phydev: target phy_device struct
+ *
+ * Description: Indicates the attached device's readiness to
+ *   handle PHY-related work.  Used during startup to start the
+ *   PHY, and after a call to phy_stop() to resume operation.
+ *   Also used to indicate the MDIO bus has cleared an error
+ *   condition.
+ */
+void phy_start(struct phy_device *phydev)
+{
+	mutex_lock(&phydev->lock);
+
+	if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
+		WARN(1, "called from state %s\n",
+		     phy_state_to_str(phydev->state));
+		goto out;
+	}
+
+	if (phydev->sfp_bus)
+		sfp_upstream_start(phydev->sfp_bus);
+
+	/* if phy was suspended, bring the physical link up again */
+	__phy_resume(phydev);
+
+	phydev->state = PHY_UP;
+
+	phy_start_machine(phydev);
+out:
+	mutex_unlock(&phydev->lock);
+}
+EXPORT_SYMBOL(phy_start);
+
+/**
+ * phy_mac_interrupt - MAC says the link has changed
+ * @phydev: phy_device struct with changed link
+ *
+ * The MAC layer is able to indicate there has been a change in the PHY link
+ * status. Trigger the state machine and work a work queue.
+ */
+void phy_mac_interrupt(struct phy_device *phydev)
+{
+	/* Trigger a state machine change */
+	phy_trigger_machine(phydev);
+}
+EXPORT_SYMBOL(phy_mac_interrupt);
+
+/**
+ * phy_loopback - Configure loopback mode of PHY
+ * @phydev: target phy_device struct
+ * @enable: enable or disable loopback mode
+ * @speed: enable loopback mode with speed
+ *
+ * Configure loopback mode of PHY and signal link down and link up if speed is
+ * changing.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int phy_loopback(struct phy_device *phydev, bool enable, int speed)
+{
+	bool link_up = false;
+	int ret = 0;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+
+	if (enable && phydev->loopback_enabled) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (!enable && !phydev->loopback_enabled) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (enable) {
+		/*
+		 * Link up is signaled with a defined speed. If speed changes,
+		 * then first link down and after that link up needs to be
+		 * signaled.
+		 */
+		if (phydev->link && phydev->state == PHY_RUNNING) {
+			/* link is up and signaled */
+			if (speed && phydev->speed != speed) {
+				/* signal link down and up for new speed */
+				phydev->link = false;
+				phydev->state = PHY_NOLINK;
+				phy_link_down(phydev);
+
+				link_up = true;
+			}
+		} else {
+			/* link is not signaled */
+			if (speed) {
+				/* signal link up for new speed */
+				link_up = true;
+			}
+		}
+	}
+
+	if (phydev->drv->set_loopback)
+		ret = phydev->drv->set_loopback(phydev, enable, speed);
+	else
+		ret = genphy_loopback(phydev, enable, speed);
+
+	if (ret) {
+		if (enable) {
+			/* try to restore link if enabling loopback fails */
+			if (phydev->drv->set_loopback)
+				phydev->drv->set_loopback(phydev, false, 0);
+			else
+				genphy_loopback(phydev, false, 0);
+		}
+
+		goto out;
+	}
+
+	if (link_up) {
+		phydev->link = true;
+		phydev->state = PHY_RUNNING;
+		phy_link_up(phydev);
+	}
+
+	phydev->loopback_enabled = enable;
+
+out:
+	mutex_unlock(&phydev->lock);
+	return ret;
+}
+EXPORT_SYMBOL(phy_loopback);
+
+/**
+ * phy_eee_tx_clock_stop_capable() - indicate whether the MAC can stop tx clock
+ * @phydev: target phy_device struct
+ *
+ * Indicate whether the MAC can disable the transmit xMII clock while in LPI
+ * state. Returns 1 if the MAC may stop the transmit clock, 0 if the MAC must
+ * not stop the transmit clock, or negative error.
+ */
+int phy_eee_tx_clock_stop_capable(struct phy_device *phydev)
+{
+	int stat1;
+
+	stat1 = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
+	if (stat1 < 0)
+		return stat1;
+
+	return !!(stat1 & MDIO_PCS_STAT1_CLKSTOP_CAP);
+}
+EXPORT_SYMBOL_GPL(phy_eee_tx_clock_stop_capable);
+
+/**
+ * phy_eee_rx_clock_stop() - configure PHY receive clock in LPI
+ * @phydev: target phy_device struct
+ * @clk_stop_enable: flag to indicate whether the clock can be stopped
+ *
+ * Configure whether the PHY can disable its receive clock during LPI mode,
+ * See IEEE 802.3 sections 22.2.2.2, 35.2.2.10, and 45.2.3.1.4.
+ *
+ * Returns: 0 or negative error.
+ */
+int phy_eee_rx_clock_stop(struct phy_device *phydev, bool clk_stop_enable)
+{
+	/* Configure the PHY to stop receiving xMII
+	 * clock while it is signaling LPI.
+	 */
+	return phy_modify_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
+			      MDIO_PCS_CTRL1_CLKSTOP_EN,
+			      clk_stop_enable ? MDIO_PCS_CTRL1_CLKSTOP_EN : 0);
+}
+EXPORT_SYMBOL_GPL(phy_eee_rx_clock_stop);
+
+/**
+ * phy_init_eee - init and check the EEE feature
+ * @phydev: target phy_device struct
+ * @clk_stop_enable: PHY may stop the clock during LPI
+ *
+ * Description: it checks if the Energy-Efficient Ethernet (EEE)
+ * is supported by looking at the MMD registers 3.20 and 7.60/61
+ * and it programs the MMD register 3.0 setting the "Clock stop enable"
+ * bit if required.
+ */
+int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
+{
+	int ret;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	ret = genphy_c45_eee_is_active(phydev, NULL);
+	if (ret < 0)
+		return ret;
+	if (!ret)
+		return -EPROTONOSUPPORT;
+
+	if (clk_stop_enable)
+		ret = phy_eee_rx_clock_stop(phydev, true);
+
+	return ret < 0 ? ret : 0;
+}
+EXPORT_SYMBOL(phy_init_eee);
+
+/**
+ * phy_get_eee_err - report the EEE wake error count
+ * @phydev: target phy_device struct
+ *
+ * Description: it is to report the number of time where the PHY
+ * failed to complete its normal wake sequence.
+ */
+int phy_get_eee_err(struct phy_device *phydev)
+{
+	int ret;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_get_eee_err);
+
+/**
+ * phy_ethtool_get_eee - get EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_keee data
+ *
+ * Description: get the current EEE settings, filling in all members of
+ * @data.
+ */
+int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_keee *data)
+{
+	int ret;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+	ret = genphy_c45_ethtool_get_eee(phydev, data);
+	eeecfg_to_eee(data, &phydev->eee_cfg);
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_ethtool_get_eee);
+
+/**
+ * phy_ethtool_set_eee_noneg - Adjusts MAC LPI configuration without PHY
+ *			       renegotiation
+ * @phydev: pointer to the target PHY device structure
+ * @old_cfg: pointer to the eee_config structure containing the old EEE settings
+ *
+ * This function updates the Energy Efficient Ethernet (EEE) configuration
+ * for cases where only the MAC's Low Power Idle (LPI) configuration changes,
+ * without triggering PHY renegotiation. It ensures that the MAC is properly
+ * informed of the new LPI settings by cycling the link down and up, which
+ * is necessary for the MAC to adopt the new configuration. This adjustment
+ * is done only if there is a change in the tx_lpi_enabled or tx_lpi_timer
+ * configuration.
+ */
+static void phy_ethtool_set_eee_noneg(struct phy_device *phydev,
+				      const struct eee_config *old_cfg)
+{
+	bool enable_tx_lpi;
+
+	if (!phydev->link)
+		return;
+
+	enable_tx_lpi = phydev->eee_cfg.tx_lpi_enabled && phydev->eee_active;
+
+	if (phydev->enable_tx_lpi != enable_tx_lpi ||
+	    phydev->eee_cfg.tx_lpi_timer != old_cfg->tx_lpi_timer) {
+		phydev->enable_tx_lpi = false;
+		phydev->link = false;
+		phy_link_down(phydev);
+		phydev->enable_tx_lpi = enable_tx_lpi;
+		phydev->link = true;
+		phy_link_up(phydev);
+	}
+}
+
+/**
+ * phy_ethtool_set_eee - set EEE supported and status
+ * @phydev: target phy_device struct
+ * @data: ethtool_keee data
+ *
+ * Description: it is to program the Advertisement EEE register.
+ */
+int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_keee *data)
+{
+	struct eee_config old_cfg;
+	int ret;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+
+	old_cfg = phydev->eee_cfg;
+	eee_to_eeecfg(&phydev->eee_cfg, data);
+
+	ret = genphy_c45_ethtool_set_eee(phydev, data);
+	if (ret == 0)
+		phy_ethtool_set_eee_noneg(phydev, &old_cfg);
+	else if (ret < 0)
+		phydev->eee_cfg = old_cfg;
+
+	mutex_unlock(&phydev->lock);
+
+	return ret < 0 ? ret : 0;
+}
+EXPORT_SYMBOL(phy_ethtool_set_eee);
+
+/**
+ * phy_ethtool_set_wol - Configure Wake On LAN
+ *
+ * @phydev: target phy_device struct
+ * @wol: Configuration requested
+ */
+int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
+{
+	int ret;
+
+	if (phydev->drv && phydev->drv->set_wol) {
+		mutex_lock(&phydev->lock);
+		ret = phydev->drv->set_wol(phydev, wol);
+		mutex_unlock(&phydev->lock);
+
+		return ret;
+	}
+
+	return -EOPNOTSUPP;
+}
+EXPORT_SYMBOL(phy_ethtool_set_wol);
+
+/**
+ * phy_ethtool_get_wol - Get the current Wake On LAN configuration
+ *
+ * @phydev: target phy_device struct
+ * @wol: Store the current configuration here
+ */
+void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
+{
+	if (phydev->drv && phydev->drv->get_wol) {
+		mutex_lock(&phydev->lock);
+		phydev->drv->get_wol(phydev, wol);
+		mutex_unlock(&phydev->lock);
+	}
+}
+EXPORT_SYMBOL(phy_ethtool_get_wol);
+
+int phy_ethtool_get_link_ksettings(struct net_device *ndev,
+				   struct ethtool_link_ksettings *cmd)
+{
+	struct phy_device *phydev = ndev->phydev;
+
+	if (!phydev)
+		return -ENODEV;
+
+	phy_ethtool_ksettings_get(phydev, cmd);
+
+	return 0;
+}
+EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
+
+int phy_ethtool_set_link_ksettings(struct net_device *ndev,
+				   const struct ethtool_link_ksettings *cmd)
+{
+	struct phy_device *phydev = ndev->phydev;
+
+	if (!phydev)
+		return -ENODEV;
+
+	return phy_ethtool_ksettings_set(phydev, cmd);
+}
+EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
+
+/**
+ * phy_ethtool_nway_reset - Restart auto negotiation
+ * @ndev: Network device to restart autoneg for
+ */
+int phy_ethtool_nway_reset(struct net_device *ndev)
+{
+	struct phy_device *phydev = ndev->phydev;
+	int ret;
+
+	if (!phydev)
+		return -ENODEV;
+
+	if (!phydev->drv)
+		return -EIO;
+
+	mutex_lock(&phydev->lock);
+	ret = phy_restart_aneg(phydev);
+	mutex_unlock(&phydev->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL(phy_ethtool_nway_reset);