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net: mscc: ocelot: add TX timestamping statistics

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Add an u64 hardware timestamping statistics structure for each ocelot
port. Export a function from the common switch library for reporting
them to ethtool. This is called by the ocelot switchdev front-end for
now.

Note that for the switchdev driver, we report the one-step PTP packets
as unconfirmed, even though in principle, for some transmission
mechanisms like FDMA, we may be able to confirm transmission and bump
the "pkts" counter in ocelot_fdma_tx_cleanup() instead. I don't have
access to hardware which uses the switchdev front-end, and I've kept the
implementation simple.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20250116104628.123555-4-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean
2025-01-16 12:46:27 +02:00
committed by Jakub Kicinski
parent 4b0a3ffa79
commit 8fbd24f3d1
4 changed files with 101 additions and 11 deletions
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11
include/soc/mscc/ocelot.h
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@@ -759,6 +759,14 @@ struct ocelot_mm_state {
u8 active_preemptible_tcs;
};
struct ocelot_ts_stats {
u64 pkts;
u64 onestep_pkts_unconfirmed;
u64 lost;
u64 err;
struct u64_stats_sync syncp;
};
struct ocelot_port;
struct ocelot_port {
@@ -778,6 +786,7 @@ struct ocelot_port {
phy_interface_t phy_mode;
struct ocelot_ts_stats *ts_stats;
struct sk_buff_head tx_skbs;
unsigned int trap_proto;
@@ -1023,6 +1032,8 @@ void ocelot_port_get_eth_mac_stats(struct ocelot *ocelot, int port,
struct ethtool_eth_mac_stats *mac_stats);
void ocelot_port_get_eth_phy_stats(struct ocelot *ocelot, int port,
struct ethtool_eth_phy_stats *phy_stats);
void ocelot_port_get_ts_stats(struct ocelot *ocelot, int port,
struct ethtool_ts_stats *ts_stats);
int ocelot_get_ts_info(struct ocelot *ocelot, int port,
struct kernel_ethtool_ts_info *info);
void ocelot_set_ageing_time(struct ocelot *ocelot, unsigned int msecs);