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Commit 7070ce0a authored by Alexander Duyck's avatar Alexander Duyck Committed by Jeff Kirsher
Browse files

i40e: Add support for Tx byte queue limits 



Implement BQL (byte queue limit) support in i40e.

Signed-off-by: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent b1941306

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

+15 −0
Original line number Diff line number Diff line
@@ -240,6 +240,13 @@ void i40e_clean_tx_ring(struct i40e_ring *tx_ring) 


	tx_ring->next_to_use = 0;

	tx_ring->next_to_clean = 0;



	if (!tx_ring->netdev)

		return;



	/* cleanup Tx queue statistics */

	netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,

						  tx_ring->queue_index));

}



/**
@@ -436,6 +443,10 @@ static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) 
		return true;

	}



	netdev_tx_completed_queue(netdev_get_tx_queue(tx_ring->netdev,

						      tx_ring->queue_index),

				  total_packets, total_bytes);



#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)

	if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&

		     (I40E_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
@@ -1602,6 +1613,10 @@ static void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, 
		build_ctob(td_cmd, td_offset, size, td_tag) |

		cpu_to_le64((u64)I40E_TXD_CMD << I40E_TXD_QW1_CMD_SHIFT);



	netdev_tx_sent_queue(netdev_get_tx_queue(tx_ring->netdev,

						 tx_ring->queue_index),

			     first->bytecount);



	/* set the timestamp */

	first->time_stamp = jiffies;