[Intel-wired-lan] [PATCH iwl-next v2 3/5] ice: add tracking of good transmit timestamps

[Jesse Brandeburg]

As a pre-requisite to implementing timestamp statistics, start tracking
successful PTP timestamps. There already existed a trace event, but
add a counter as well so it can be displayed by the next patch.

Good count is a u64 as it is much more likely to be incremented. The
existing error stats are all u32 as before, and are less likely so will
wrap less.

Reviewed-by: Jacob Keller <jacob.e.kel...@intel.com>
Reviewed-by: Jakub Kicinski <k...@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeb...@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_ptp.c | 9 +++++++++
 drivers/net/ethernet/intel/ice/ice_ptp.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c 
b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 0f17fc1181d2..ff0ba81d0694 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -628,6 +628,9 @@ void ice_ptp_complete_tx_single_tstamp(struct ice_ptp_tx 
*tx)
        if (tstamp) {
                shhwtstamps.hwtstamp = ns_to_ktime(tstamp);
                ice_trace(tx_tstamp_complete, skb, idx);
+
+               /* Count the number of Tx timestamps that succeeded */
+               pf->ptp.tx_hwtstamp_good++;
        }
 
        skb_tstamp_tx(skb, &shhwtstamps);
@@ -686,6 +689,7 @@ static void ice_ptp_process_tx_tstamp(struct ice_ptp_tx *tx)
 {
        struct ice_ptp_port *ptp_port;
        unsigned long flags;
+       u32 tstamp_good = 0;
        struct ice_pf *pf;
        struct ice_hw *hw;
        u64 tstamp_ready;
@@ -786,11 +790,16 @@ static void ice_ptp_process_tx_tstamp(struct ice_ptp_tx 
*tx)
                if (tstamp) {
                        shhwtstamps.hwtstamp = ns_to_ktime(tstamp);
                        ice_trace(tx_tstamp_complete, skb, idx);
+
+                       /* Count the number of Tx timestamps that succeeded */
+                       tstamp_good++;
                }
 
                skb_tstamp_tx(skb, &shhwtstamps);
                dev_kfree_skb_any(skb);
        }
+
+       pf->ptp.tx_hwtstamp_good += tstamp_good;
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.h 
b/drivers/net/ethernet/intel/ice/ice_ptp.h
index 3af20025043a..2b15f2b58789 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.h
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.h
@@ -253,6 +253,7 @@ struct ice_ptp {
        struct ptp_clock *clock;
        struct hwtstamp_config tstamp_config;
        u64 reset_time;
+       u64 tx_hwtstamp_good;
        u32 tx_hwtstamp_skipped;
        u32 tx_hwtstamp_timeouts;
        u32 tx_hwtstamp_flushed;
-- 
2.43.0