6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jakub Kicinski <kuba@xxxxxxxxxx>
[ Upstream commit b7a2c1fe6b55364e61b4b54b991eb43a47bb1104 ]
Introduce support for standardized PHY statistics reporting in ethtool
by extending the PHYLIB framework. Add the functions
phy_ethtool_get_phy_stats() and phy_ethtool_get_link_ext_stats() to
provide a consistent interface for retrieving PHY-level and
link-specific statistics. These functions are used within the ethtool
implementation to avoid direct access to the phy_device structure
outside of the PHYLIB framework.
A new structure, ethtool_phy_stats, is introduced to standardize PHY
statistics such as packet counts, byte counts, and error counters.
Drivers are updated to include callbacks for retrieving PHY and
link-specific statistics, ensuring values are explicitly set only for
supported fields, initialized with ETHTOOL_STAT_NOT_SET to avoid
ambiguity.
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Stable-dep-of: 637399bf7e77 ("net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/phy/phy.c | 43 ++++++++++++++++++++++++++++++++++++
drivers/net/phy/phy_device.c | 2 ++
include/linux/ethtool.h | 23 +++++++++++++++++++
include/linux/phy.h | 36 ++++++++++++++++++++++++++++++
include/linux/phylib_stubs.h | 42 +++++++++++++++++++++++++++++++++++
net/ethtool/linkstate.c | 5 +++--
net/ethtool/stats.c | 18 +++++++++++++++
7 files changed, 167 insertions(+), 2 deletions(-)
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 4f3e742907cb6..c9cfdc33fc5f1 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -615,6 +615,49 @@ int phy_ethtool_get_stats(struct phy_device *phydev,
}
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
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 499797646580e..119dfa2d6643a 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3776,6 +3776,8 @@ static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
static const struct phylib_stubs __phylib_stubs = {
.hwtstamp_get = __phy_hwtstamp_get,
.hwtstamp_set = __phy_hwtstamp_set,
+ .get_phy_stats = __phy_ethtool_get_phy_stats,
+ .get_link_ext_stats = __phy_ethtool_get_link_ext_stats,
};
static void phylib_register_stubs(void)
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index b8b935b526033..b0ed740ca749b 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -412,6 +412,29 @@ struct ethtool_eth_phy_stats {
);
};
+/**
+ * struct ethtool_phy_stats - PHY-level statistics counters
+ * @rx_packets: Total successfully received frames
+ * @rx_bytes: Total successfully received bytes
+ * @rx_errors: Total received frames with errors (e.g., CRC errors)
+ * @tx_packets: Total successfully transmitted frames
+ * @tx_bytes: Total successfully transmitted bytes
+ * @tx_errors: Total transmitted frames with errors
+ *
+ * This structure provides a standardized interface for reporting
+ * PHY-level statistics counters. It is designed to expose statistics
+ * commonly provided by PHYs but not explicitly defined in the IEEE
+ * 802.3 standard.
+ */
+struct ethtool_phy_stats {
+ u64 rx_packets;
+ u64 rx_bytes;
+ u64 rx_errors;
+ u64 tx_packets;
+ u64 tx_bytes;
+ u64 tx_errors;
+};
+
/* Basic IEEE 802.3 MAC Ctrl statistics (30.3.3.*), not otherwise exposed
* via a more targeted API.
*/
diff --git a/include/linux/phy.h b/include/linux/phy.h
index a98bc91a0cde9..945264f457d8a 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1090,6 +1090,35 @@ struct phy_driver {
int (*cable_test_get_status)(struct phy_device *dev, bool *finished);
/* Get statistics from the PHY using ethtool */
+ /**
+ * @get_phy_stats: Retrieve PHY statistics.
+ * @dev: The PHY device for which the statistics are retrieved.
+ * @eth_stats: structure where Ethernet PHY stats will be stored.
+ * @stats: structure where additional PHY-specific stats will be stored.
+ *
+ * Retrieves the supported PHY statistics and populates the provided
+ * structures. The input structures are pre-initialized with
+ * `ETHTOOL_STAT_NOT_SET`, and the driver must only modify members
+ * corresponding to supported statistics. Unmodified members will remain
+ * set to `ETHTOOL_STAT_NOT_SET` and will not be returned to userspace.
+ */
+ void (*get_phy_stats)(struct phy_device *dev,
+ struct ethtool_eth_phy_stats *eth_stats,
+ struct ethtool_phy_stats *stats);
+
+ /**
+ * @get_link_stats: Retrieve link statistics.
+ * @dev: The PHY device for which the statistics are retrieved.
+ * @link_stats: structure where link-specific stats will be stored.
+ *
+ * Retrieves link-related statistics for the given PHY device. The input
+ * structure is pre-initialized with `ETHTOOL_STAT_NOT_SET`, and the
+ * driver must only modify members corresponding to supported
+ * statistics. Unmodified members will remain set to
+ * `ETHTOOL_STAT_NOT_SET` and will not be returned to userspace.
+ */
+ void (*get_link_stats)(struct phy_device *dev,
+ struct ethtool_link_ext_stats *link_stats);
/** @get_sset_count: Number of statistic counters */
int (*get_sset_count)(struct phy_device *dev);
/** @get_strings: Names of the statistic counters */
@@ -2055,6 +2084,13 @@ int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data);
int phy_ethtool_get_sset_count(struct phy_device *phydev);
int phy_ethtool_get_stats(struct phy_device *phydev,
struct ethtool_stats *stats, u64 *data);
+
+void __phy_ethtool_get_phy_stats(struct phy_device *phydev,
+ struct ethtool_eth_phy_stats *phy_stats,
+ struct ethtool_phy_stats *phydev_stats);
+void __phy_ethtool_get_link_ext_stats(struct phy_device *phydev,
+ struct ethtool_link_ext_stats *link_stats);
+
int phy_ethtool_get_plca_cfg(struct phy_device *phydev,
struct phy_plca_cfg *plca_cfg);
int phy_ethtool_set_plca_cfg(struct phy_device *phydev,
diff --git a/include/linux/phylib_stubs.h b/include/linux/phylib_stubs.h
index 1279f48c8a707..9d2d6090c86d1 100644
--- a/include/linux/phylib_stubs.h
+++ b/include/linux/phylib_stubs.h
@@ -5,6 +5,9 @@
#include <linux/rtnetlink.h>
+struct ethtool_eth_phy_stats;
+struct ethtool_link_ext_stats;
+struct ethtool_phy_stats;
struct kernel_hwtstamp_config;
struct netlink_ext_ack;
struct phy_device;
@@ -19,6 +22,11 @@ struct phylib_stubs {
int (*hwtstamp_set)(struct phy_device *phydev,
struct kernel_hwtstamp_config *config,
struct netlink_ext_ack *extack);
+ void (*get_phy_stats)(struct phy_device *phydev,
+ struct ethtool_eth_phy_stats *phy_stats,
+ struct ethtool_phy_stats *phydev_stats);
+ void (*get_link_ext_stats)(struct phy_device *phydev,
+ struct ethtool_link_ext_stats *link_stats);
};
static inline int phy_hwtstamp_get(struct phy_device *phydev,
@@ -50,6 +58,29 @@ static inline int phy_hwtstamp_set(struct phy_device *phydev,
return phylib_stubs->hwtstamp_set(phydev, config, extack);
}
+static inline void phy_ethtool_get_phy_stats(struct phy_device *phydev,
+ struct ethtool_eth_phy_stats *phy_stats,
+ struct ethtool_phy_stats *phydev_stats)
+{
+ ASSERT_RTNL();
+
+ if (!phylib_stubs)
+ return;
+
+ phylib_stubs->get_phy_stats(phydev, phy_stats, phydev_stats);
+}
+
+static inline void phy_ethtool_get_link_ext_stats(struct phy_device *phydev,
+ struct ethtool_link_ext_stats *link_stats)
+{
+ ASSERT_RTNL();
+
+ if (!phylib_stubs)
+ return;
+
+ phylib_stubs->get_link_ext_stats(phydev, link_stats);
+}
+
#else
static inline int phy_hwtstamp_get(struct phy_device *phydev,
@@ -65,4 +96,15 @@ static inline int phy_hwtstamp_set(struct phy_device *phydev,
return -EOPNOTSUPP;
}
+static inline void phy_ethtool_get_phy_stats(struct phy_device *phydev,
+ struct ethtool_eth_phy_stats *phy_stats,
+ struct ethtool_phy_stats *phydev_stats)
+{
+}
+
+static inline void phy_ethtool_get_link_ext_stats(struct phy_device *phydev,
+ struct ethtool_link_ext_stats *link_stats)
+{
+}
+
#endif
diff --git a/net/ethtool/linkstate.c b/net/ethtool/linkstate.c
index 459cfea7652d4..af19e1bed303f 100644
--- a/net/ethtool/linkstate.c
+++ b/net/ethtool/linkstate.c
@@ -3,6 +3,7 @@
#include "netlink.h"
#include "common.h"
#include <linux/phy.h>
+#include <linux/phylib_stubs.h>
struct linkstate_req_info {
struct ethnl_req_info base;
@@ -135,8 +136,8 @@ static int linkstate_prepare_data(const struct ethnl_req_info *req_base,
if (req_base->flags & ETHTOOL_FLAG_STATS) {
if (phydev)
- data->link_stats.link_down_events =
- READ_ONCE(phydev->link_down_events);
+ phy_ethtool_get_link_ext_stats(phydev,
+ &data->link_stats);
if (dev->ethtool_ops->get_link_ext_stats)
dev->ethtool_ops->get_link_ext_stats(dev,
diff --git a/net/ethtool/stats.c b/net/ethtool/stats.c
index 912f0c4fff2fb..f4d822c225db6 100644
--- a/net/ethtool/stats.c
+++ b/net/ethtool/stats.c
@@ -1,5 +1,8 @@
// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/phy.h>
+#include <linux/phylib_stubs.h>
+
#include "netlink.h"
#include "common.h"
#include "bitset.h"
@@ -20,6 +23,7 @@ struct stats_reply_data {
struct ethtool_eth_mac_stats mac_stats;
struct ethtool_eth_ctrl_stats ctrl_stats;
struct ethtool_rmon_stats rmon_stats;
+ struct ethtool_phy_stats phydev_stats;
);
const struct ethtool_rmon_hist_range *rmon_ranges;
};
@@ -120,8 +124,15 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base,
struct stats_reply_data *data = STATS_REPDATA(reply_base);
enum ethtool_mac_stats_src src = req_info->src;
struct net_device *dev = reply_base->dev;
+ struct nlattr **tb = info->attrs;
+ struct phy_device *phydev;
int ret;
+ phydev = ethnl_req_get_phydev(req_base, tb[ETHTOOL_A_STATS_HEADER],
+ info->extack);
+ if (IS_ERR(phydev))
+ return PTR_ERR(phydev);
+
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
@@ -145,6 +156,13 @@ static int stats_prepare_data(const struct ethnl_req_info *req_base,
data->ctrl_stats.src = src;
data->rmon_stats.src = src;
+ if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
+ src == ETHTOOL_MAC_STATS_SRC_AGGREGATE) {
+ if (phydev)
+ phy_ethtool_get_phy_stats(phydev, &data->phy_stats,
+ &data->phydev_stats);
+ }
+
if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
dev->ethtool_ops->get_eth_phy_stats)
dev->ethtool_ops->get_eth_phy_stats(dev, &data->phy_stats);
--
2.39.5
