igb: Add support for byte queue limits.

This adds support for byte queue limits (BQL)

Since this driver collects bytes count in 'bytecount' field, use it also
in igb_tx_map()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 10 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h
index c69feebf2653..3d12e67eebb4 100644
--- a/drivers/net/ethernet/intel/igb/igb.h
+++ b/drivers/net/ethernet/intel/igb/igb.h
@@ -447,4 +447,9 @@ static inline s32 igb_get_phy_info(struct e1000_hw *hw)
         return 0;
 }
 
+static inline struct netdev_queue *txring_txq(const struct igb_ring *tx_ring)
+{
+        return netdev_get_tx_queue(tx_ring->netdev, tx_ring->queue_index);
+}
+
 #endif /* _IGB_H_ */
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 89d576ce5776..dcc68cc19da6 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -3201,6 +3201,7 @@ static void igb_clean_tx_ring(struct igb_ring *tx_ring)
                 buffer_info = &tx_ring->tx_buffer_info[i];
                 igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
         }
+        netdev_tx_reset_queue(txring_txq(tx_ring));
 
         size = sizeof(struct igb_tx_buffer) * tx_ring->count;
         memset(tx_ring->tx_buffer_info, 0, size);
@@ -4238,6 +4239,8 @@ static void igb_tx_map(struct igb_ring *tx_ring,
                 frag++;
         }
 
+        netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
+
         /* write last descriptor with RS and EOP bits */
         cmd_type |= cpu_to_le32(size) | cpu_to_le32(IGB_TXD_DCMD);
         tx_desc->read.cmd_type_len = cmd_type;
@@ -5777,6 +5780,8 @@ static bool igb_clean_tx_irq(struct igb_q_vector *q_vector)
                 }
         }
 
+        netdev_tx_completed_queue(txring_txq(tx_ring),
+                                  total_packets, total_bytes);
         i += tx_ring->count;
         tx_ring->next_to_clean = i;
         u64_stats_update_begin(&tx_ring->tx_syncp);