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Commit 2fc3d715 authored by Anjali Singhai Jain's avatar Anjali Singhai Jain Committed by Jeff Kirsher
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i40e/i40evf: Add a stat to keep track of linearization count 



Keep track of how many times we ask the stack to linearize the
skb because the HW cannot handle skbs with more than 8 frags per
segment/single packet.

Change-ID: If455452060963a769bbe6112cba952e79e944b52
Signed-off-by: default avatarAnjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 2f41f335

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

+1 −0
Original line number Diff line number Diff line
@@ -475,6 +475,7 @@ struct i40e_vsi { 
#endif

	u32 tx_restart;

	u32 tx_busy;

	u64 tx_linearize;

	u32 rx_buf_failed;

	u32 rx_page_failed;

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

+1 −0
Original line number Diff line number Diff line
@@ -87,6 +87,7 @@ static const struct i40e_stats i40e_gstrings_misc_stats[] = { 
	I40E_VSI_STAT("rx_broadcast", eth_stats.rx_broadcast),

	I40E_VSI_STAT("tx_broadcast", eth_stats.tx_broadcast),

	I40E_VSI_STAT("rx_unknown_protocol", eth_stats.rx_unknown_protocol),

	I40E_VSI_STAT("tx_linearize", tx_linearize),

};



static int i40e_add_fdir_ethtool(struct i40e_vsi *vsi,

drivers/net/ethernet/intel/i40e/i40e_main.c

+4 −1
Original line number Diff line number Diff line
@@ -879,6 +879,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) 
	u32 rx_page, rx_buf;

	u64 bytes, packets;

	unsigned int start;

	u64 tx_linearize;

	u64 rx_p, rx_b;

	u64 tx_p, tx_b;

	u16 q;
@@ -897,7 +898,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) 
	 */

	rx_b = rx_p = 0;

	tx_b = tx_p = 0;

	tx_restart = tx_busy = 0;

	tx_restart = tx_busy = tx_linearize = 0;

	rx_page = 0;

	rx_buf = 0;

	rcu_read_lock();
@@ -914,6 +915,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) 
		tx_p += packets;

		tx_restart += p->tx_stats.restart_queue;

		tx_busy += p->tx_stats.tx_busy;

		tx_linearize += p->tx_stats.tx_linearize;



		/* Rx queue is part of the same block as Tx queue */

		p = &p[1];
@@ -930,6 +932,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi) 
	rcu_read_unlock();

	vsi->tx_restart = tx_restart;

	vsi->tx_busy = tx_busy;

	vsi->tx_linearize = tx_linearize;

	vsi->rx_page_failed = rx_page;

	vsi->rx_buf_failed = rx_buf;

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

+3 −2
Original line number Diff line number Diff line
@@ -2771,10 +2771,11 @@ static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, 
	if (tsyn)

		tx_flags |= I40E_TX_FLAGS_TSYN;



	if (i40e_chk_linearize(skb, tx_flags))

	if (i40e_chk_linearize(skb, tx_flags)) {

		if (skb_linearize(skb))

			goto out_drop;



		tx_ring->tx_stats.tx_linearize++;

	}

	skb_tx_timestamp(skb);



	/* always enable CRC insertion offload */

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

+1 −0
Original line number Diff line number Diff line
@@ -188,6 +188,7 @@ struct i40e_tx_queue_stats { 
	u64 restart_queue;

	u64 tx_busy;

	u64 tx_done_old;

	u64 tx_linearize;

};



struct i40e_rx_queue_stats {