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Commit 2955faca authored by Jacob Keller's avatar Jacob Keller Committed by Jeff Kirsher
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i40e: add statistic indicating number of skipped Tx timestamps 



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: default avatarJacob Keller <jacob.e.keller@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 69077577

drivers/net/ethernet/intel/i40e/i40e.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -506,6 +506,7 @@ struct i40e_pf { 
	struct mutex tmreg_lock; /* Used to protect the SYSTIME registers. */

	struct mutex tmreg_lock; /* Used to protect the SYSTIME registers. */

	u64 ptp_base_adj;

	u64 ptp_base_adj;

	u32 tx_hwtstamp_timeouts;

	u32 tx_hwtstamp_timeouts;

	u32 tx_hwtstamp_skipped;

	u32 rx_hwtstamp_cleared;

	u32 rx_hwtstamp_cleared;

	u32 latch_event_flags;

	u32 latch_event_flags;

	spinlock_t ptp_rx_lock; /* Used to protect Rx timestamp registers. */

	spinlock_t ptp_rx_lock; /* Used to protect Rx timestamp registers. */

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -147,6 +147,7 @@ static const struct i40e_stats i40e_gstrings_stats[] = { 
	I40E_PF_STAT("VF_admin_queue_requests", vf_aq_requests),

	I40E_PF_STAT("VF_admin_queue_requests", vf_aq_requests),

	I40E_PF_STAT("arq_overflows", arq_overflows),

	I40E_PF_STAT("arq_overflows", arq_overflows),

	I40E_PF_STAT("rx_hwtstamp_cleared", rx_hwtstamp_cleared),

	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_flush_cnt", fd_flush_cnt),

	I40E_PF_STAT("fdir_atr_match", stats.fd_atr_match),

	I40E_PF_STAT("fdir_atr_match", stats.fd_atr_match),

	I40E_PF_STAT("fdir_atr_tunnel_match", stats.fd_atr_tunnel_match),

	I40E_PF_STAT("fdir_atr_tunnel_match", stats.fd_atr_tunnel_match),

drivers/net/ethernet/intel/i40e/i40e_txrx.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -2630,6 +2630,7 @@ static int i40e_tsyn(struct i40e_ring *tx_ring, struct sk_buff *skb, 
		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;

		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;

		pf->ptp_tx_skb = skb_get(skb);

		pf->ptp_tx_skb = skb_get(skb);

	} else {

	} else {

		pf->tx_hwtstamp_skipped++;

		return 0;

		return 0;

	}

	}