ethtool: add interface to read standard MAC stats

Most of the MAC statistics are included in
struct rtnl_link_stats64, but some fields
are aggregated. Besides it's good to expose
these clearly hardware stats separately.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 86 insertions, 0 deletions

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 2d5455eedbf4..3c689a13e679 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -250,6 +250,34 @@ static inline void ethtool_stats_init(u64 *stats, unsigned int n)
 		stats[n] = ETHTOOL_STAT_NOT_SET;
 }
 
+/* Basic IEEE 802.3 MAC statistics (30.3.1.1.*), not otherwise exposed
+ * via a more targeted API.
+ */
+struct ethtool_eth_mac_stats {
+	u64 FramesTransmittedOK;
+	u64 SingleCollisionFrames;
+	u64 MultipleCollisionFrames;
+	u64 FramesReceivedOK;
+	u64 FrameCheckSequenceErrors;
+	u64 AlignmentErrors;
+	u64 OctetsTransmittedOK;
+	u64 FramesWithDeferredXmissions;
+	u64 LateCollisions;
+	u64 FramesAbortedDueToXSColls;
+	u64 FramesLostDueToIntMACXmitError;
+	u64 CarrierSenseErrors;
+	u64 OctetsReceivedOK;
+	u64 FramesLostDueToIntMACRcvError;
+	u64 MulticastFramesXmittedOK;
+	u64 BroadcastFramesXmittedOK;
+	u64 FramesWithExcessiveDeferral;
+	u64 MulticastFramesReceivedOK;
+	u64 BroadcastFramesReceivedOK;
+	u64 InRangeLengthErrors;
+	u64 OutOfRangeLengthField;
+	u64 FrameTooLongErrors;
+};
+
 /* Basic IEEE 802.3 PHY statistics (30.3.2.1.*), not otherwise exposed
  * via a more targeted API.
  */
@@ -495,6 +523,7 @@ struct ethtool_module_eeprom {
  *	specified page. Returns a negative error code or the amount of bytes
  *	read.
  * @get_eth_phy_stats: Query some of the IEEE 802.3 PHY statistics.
+ * @get_eth_mac_stats: Query some of the IEEE 802.3 MAC statistics.
  *
  * All operations are optional (i.e. the function pointer may be set
  * to %NULL) and callers must take this into account.  Callers must
@@ -607,6 +636,8 @@ struct ethtool_ops {
 					     struct netlink_ext_ack *extack);
 	void	(*get_eth_phy_stats)(struct net_device *dev,
 				     struct ethtool_eth_phy_stats *phy_stats);
+	void	(*get_eth_mac_stats)(struct net_device *dev,
+				     struct ethtool_eth_mac_stats *mac_stats);
 };
 
 int ethtool_check_ops(const struct ethtool_ops *ops);
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 190ae6e03918..c227376d811a 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -671,6 +671,7 @@ enum ethtool_link_ext_substate_cable_issue {
  * @ETH_SS_UDP_TUNNEL_TYPES: UDP tunnel types
  * @ETH_SS_STATS_STD: standardized stats
  * @ETH_SS_STATS_ETH_PHY: names of IEEE 802.3 PHY statistics
+ * @ETH_SS_STATS_ETH_MAC: names of IEEE 802.3 MAC statistics
  *
  * @ETH_SS_COUNT: number of defined string sets
  */
@@ -693,6 +694,7 @@ enum ethtool_stringset {
 	ETH_SS_UDP_TUNNEL_TYPES,
 	ETH_SS_STATS_STD,
 	ETH_SS_STATS_ETH_PHY,
+	ETH_SS_STATS_ETH_MAC,
 
 	/* add new constants above here */
 	ETH_SS_COUNT
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index a54cfe625f34..f0fbe8f4eb1b 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -698,6 +698,7 @@ enum {
 
 enum {
 	ETHTOOL_STATS_ETH_PHY,
+	ETHTOOL_STATS_ETH_MAC,
 
 	/* add new constants above here */
 	__ETHTOOL_STATS_CNT
@@ -726,6 +727,58 @@ enum {
 	ETHTOOL_A_STATS_ETH_PHY_MAX = (__ETHTOOL_A_STATS_ETH_PHY_CNT - 1)
 };
 
+enum {
+	/* 30.3.1.1.2 aFramesTransmittedOK */
+	ETHTOOL_A_STATS_ETH_MAC_2_TX_PKT,
+	/* 30.3.1.1.3 aSingleCollisionFrames */
+	ETHTOOL_A_STATS_ETH_MAC_3_SINGLE_COL,
+	/* 30.3.1.1.4 aMultipleCollisionFrames */
+	ETHTOOL_A_STATS_ETH_MAC_4_MULTI_COL,
+	/* 30.3.1.1.5 aFramesReceivedOK */
+	ETHTOOL_A_STATS_ETH_MAC_5_RX_PKT,
+	/* 30.3.1.1.6 aFrameCheckSequenceErrors */
+	ETHTOOL_A_STATS_ETH_MAC_6_FCS_ERR,
+	/* 30.3.1.1.7 aAlignmentErrors */
+	ETHTOOL_A_STATS_ETH_MAC_7_ALIGN_ERR,
+	/* 30.3.1.1.8 aOctetsTransmittedOK */
+	ETHTOOL_A_STATS_ETH_MAC_8_TX_BYTES,
+	/* 30.3.1.1.9 aFramesWithDeferredXmissions */
+	ETHTOOL_A_STATS_ETH_MAC_9_TX_DEFER,
+	/* 30.3.1.1.10 aLateCollisions */
+	ETHTOOL_A_STATS_ETH_MAC_10_LATE_COL,
+	/* 30.3.1.1.11 aFramesAbortedDueToXSColls */
+	ETHTOOL_A_STATS_ETH_MAC_11_XS_COL,
+	/* 30.3.1.1.12 aFramesLostDueToIntMACXmitError */
+	ETHTOOL_A_STATS_ETH_MAC_12_TX_INT_ERR,
+	/* 30.3.1.1.13 aCarrierSenseErrors */
+	ETHTOOL_A_STATS_ETH_MAC_13_CS_ERR,
+	/* 30.3.1.1.14 aOctetsReceivedOK */
+	ETHTOOL_A_STATS_ETH_MAC_14_RX_BYTES,
+	/* 30.3.1.1.15 aFramesLostDueToIntMACRcvError */
+	ETHTOOL_A_STATS_ETH_MAC_15_RX_INT_ERR,
+
+	/* 30.3.1.1.18 aMulticastFramesXmittedOK */
+	ETHTOOL_A_STATS_ETH_MAC_18_TX_MCAST,
+	/* 30.3.1.1.19 aBroadcastFramesXmittedOK */
+	ETHTOOL_A_STATS_ETH_MAC_19_TX_BCAST,
+	/* 30.3.1.1.20 aFramesWithExcessiveDeferral */
+	ETHTOOL_A_STATS_ETH_MAC_20_XS_DEFER,
+	/* 30.3.1.1.21 aMulticastFramesReceivedOK */
+	ETHTOOL_A_STATS_ETH_MAC_21_RX_MCAST,
+	/* 30.3.1.1.22 aBroadcastFramesReceivedOK */
+	ETHTOOL_A_STATS_ETH_MAC_22_RX_BCAST,
+	/* 30.3.1.1.23 aInRangeLengthErrors */
+	ETHTOOL_A_STATS_ETH_MAC_23_IR_LEN_ERR,
+	/* 30.3.1.1.24 aOutOfRangeLengthField */
+	ETHTOOL_A_STATS_ETH_MAC_24_OOR_LEN,
+	/* 30.3.1.1.25 aFrameTooLongErrors */
+	ETHTOOL_A_STATS_ETH_MAC_25_TOO_LONG_ERR,
+
+	/* add new constants above here */
+	__ETHTOOL_A_STATS_ETH_MAC_CNT,
+	ETHTOOL_A_STATS_ETH_MAC_MAX = (__ETHTOOL_A_STATS_ETH_MAC_CNT - 1)
+};
+
 /* generic netlink info */
 #define ETHTOOL_GENL_NAME "ethtool"
 #define ETHTOOL_GENL_VERSION 1