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Commit 8d7179b1 authored by Radoslaw Tyl's avatar Radoslaw Tyl Committed by Jeff Kirsher
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ixgbe: Fix ixgbe TX hangs with XDP_TX beyond queue limit 



We have Tx hang when number Tx and XDP queues are more than 64.
In XDP always is MTQC == 0x0 (64TxQs). We need more space for Tx queues.

Signed-off-by: default avatarRadoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: default avatarAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 2c49d34f

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

+10 −4
Original line number Diff line number Diff line
@@ -3577,13 +3577,19 @@ static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter) 
		else

			mtqc |= IXGBE_MTQC_64VF;

	} else {

		if (tcs > 4)

		if (tcs > 4) {

			mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;

		else if (tcs > 1)

		} else if (tcs > 1) {

			mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;

		} else {

			u8 max_txq = adapter->num_tx_queues +

				adapter->num_xdp_queues;

			if (max_txq > 63)

				mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;

			else

				mtqc = IXGBE_MTQC_64Q_1PB;

		}

	}



	IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);