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i40e: Add support for Tx byte queue limits 

Implement BQL (byte queue limit) support in i40e.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2013-09-28 06:00:37 +00:00 committed by Jeff Kirsher
parent b194130627
commit 7070ce0a64
1 changed files with 15 additions and 0 deletions
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15
drivers/net/ethernet/intel/i40e/i40e_txrx.c
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@ -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;