From: Jacob Keller <jacob.e.keller@intel.com>
Date: Wed, 3 May 2017 10:28:58 -0700
Subject: i40e: add statistic indicating number of skipped Tx timestamps
Patch-mainline: v4.13-rc1
Git-commit: 2955faca0403a4f6029d589f60ff44be09f24859
References: bsc#1056658 FATE#322188 bsc#1056662 FATE#322186
The i40e driver can only handle one Tx timestamp request at a time.
This means it is possible for an application timestamp request to be
ignored.
There is no easy way for an administrator to determine if this occurred.
Add a new statistic which tracks this, tx_hwtstamp_skipped.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Benjamin Poirier <bpoirier@suse.com>
---
drivers/net/ethernet/intel/i40e/i40e.h | 1 +
drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 1 +
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 1 +
3 files changed, 3 insertions(+)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -507,6 +507,7 @@ struct i40e_pf {
struct mutex tmreg_lock; /* Used to protect the SYSTIME registers. */
u64 ptp_base_adj;
u32 tx_hwtstamp_timeouts;
+ u32 tx_hwtstamp_skipped;
u32 rx_hwtstamp_cleared;
u32 latch_event_flags;
spinlock_t ptp_rx_lock; /* Used to protect Rx timestamp registers. */
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -147,6 +147,7 @@ static const struct i40e_stats i40e_gstr
I40E_PF_STAT("VF_admin_queue_requests", vf_aq_requests),
I40E_PF_STAT("arq_overflows", arq_overflows),
I40E_PF_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared),
+ I40E_PF_STAT("tx_hwtstamp_skipped", tx_hwtstamp_skipped),
I40E_PF_STAT("fdir_flush_cnt", fd_flush_cnt),
I40E_PF_STAT("fdir_atr_match", stats.fd_atr_match),
I40E_PF_STAT("fdir_atr_tunnel_match", stats.fd_atr_tunnel_match),
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -2631,6 +2631,7 @@ static int i40e_tsyn(struct i40e_ring *t
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
pf->ptp_tx_skb = skb_get(skb);
} else {
+ pf->tx_hwtstamp_skipped++;
return 0;
}