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ixgbe: Fix ixgbe TX hangs with XDP_TX beyond queue limit

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[ Upstream commit 8d7179b1e2 ]

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: Radoslaw Tyl <radoslawx.tyl@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Radoslaw Tyl
2018-09-05 09:00:51 +02:00
committed by Greg Kroah-Hartman
parent b69cfc4f26
commit 22b8d7e3bc
1 changed files with 10 additions and 4 deletions
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14
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@@ -3582,12 +3582,18 @@ 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
mtqc = IXGBE_MTQC_64Q_1PB;
} 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);