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net: phy: introduce optional polling interface for PHY statistics

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Add an optional polling interface for PHY statistics to simplify driver
implementation.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Oleksij Rempel 2025-01-10 07:05:15 +01:00 committed by Paolo Abeni
parent 7d66c74a17
commit f2bc1c2655
2 changed files with 41 additions and 0 deletions
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20
drivers/net/phy/phy.c
View File

@ -1441,6 +1441,23 @@ 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
@ -1510,6 +1527,9 @@ static enum phy_state_work _phy_state_machine(struct phy_device *phydev)
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);

21
include/linux/phy.h
View File

@ -1173,6 +1173,24 @@ struct phy_driver {
*/
void (*get_link_stats)(struct phy_device *dev,
struct ethtool_link_ext_stats *link_stats);
/**
* @update_stats: Trigger periodic statistics updates.
* @dev: The PHY device for which statistics updates are triggered.
*
* Periodically gathers statistics from the PHY device to update locally
* maintained 64-bit counters. This is necessary for PHYs that implement
* reduced-width counters (e.g., 16-bit or 32-bit) which can overflow
* more frequently compared to 64-bit counters. By invoking this
* callback, drivers can fetch the current counter values, handle
* overflow detection, and accumulate the results into local 64-bit
* counters for accurate reporting through the `get_phy_stats` and
* `get_link_stats` interfaces.
*
* Return: 0 on success or a negative error code on failure.
*/
int (*update_stats)(struct phy_device *dev);
/** @get_sset_count: Number of statistic counters */
int (*get_sset_count)(struct phy_device *dev);
/** @get_strings: Names of the statistic counters */
@ -1663,6 +1681,9 @@ static inline bool phy_polling_mode(struct phy_device *phydev)
if (phydev->drv->flags & PHY_POLL_CABLE_TEST)
return true;
if (phydev->drv->update_stats)
return true;
return phydev->irq == PHY_POLL;
}