From fb5475ff7f2e80e920a393d18a43b64124a30270 Mon Sep 17 00:00:00 2001 From: John Fastabend Date: Tue, 26 Apr 2011 07:26:36 +0000 Subject: ixgbe: DCB, remove unneeded ixgbe_dcb_txq_to_tc() routine The ixgbe_dcb_txq_to_tc() routine was used to map TX rings to a DCB traffic class. Now that a tx_ring has a DCB traffic class associated with it this routine is no longer needed. Signed-off-by: John Fastabend Tested-by: Ross Brattain Signed-off-by: Jeff Kirsher --- drivers/net/ixgbe/ixgbe_main.c | 58 +----------------------------------------- 1 file changed, 1 insertion(+), 57 deletions(-) (limited to 'drivers/net/ixgbe/ixgbe_main.c') diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 5caf42a3a7f..295ab6d8923 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -665,62 +665,6 @@ void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring, /* tx_buffer_info must be completely set up in the transmit path */ } -/** - * ixgbe_dcb_txq_to_tc - convert a reg index to a traffic class - * @adapter: driver private struct - * @index: reg idx of queue to query (0-127) - * - * Helper function to determine the traffic index for a particular - * register index. - * - * Returns : a tc index for use in range 0-7, or 0-3 - */ -static u8 ixgbe_dcb_txq_to_tc(struct ixgbe_adapter *adapter, u8 reg_idx) -{ - int tc = -1; - int dcb_i = netdev_get_num_tc(adapter->netdev); - - /* if DCB is not enabled the queues have no TC */ - if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) - return tc; - - /* check valid range */ - if (reg_idx >= adapter->hw.mac.max_tx_queues) - return tc; - - switch (adapter->hw.mac.type) { - case ixgbe_mac_82598EB: - tc = reg_idx >> 2; - break; - default: - if (dcb_i != 4 && dcb_i != 8) - break; - - /* if VMDq is enabled the lowest order bits determine TC */ - if (adapter->flags & (IXGBE_FLAG_SRIOV_ENABLED | - IXGBE_FLAG_VMDQ_ENABLED)) { - tc = reg_idx & (dcb_i - 1); - break; - } - - /* - * Convert the reg_idx into the correct TC. This bitmask - * targets the last full 32 ring traffic class and assigns - * it a value of 1. From there the rest of the rings are - * based on shifting the mask further up to include the - * reg_idx / 16 and then reg_idx / 8. It assumes dcB_i - * will only ever be 8 or 4 and that reg_idx will never - * be greater then 128. The code without the power of 2 - * optimizations would be: - * (((reg_idx % 32) + 32) * dcb_i) >> (9 - reg_idx / 32) - */ - tc = ((reg_idx & 0X1F) + 0x20) * dcb_i; - tc >>= 9 - (reg_idx >> 5); - } - - return tc; -} - static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter) { struct ixgbe_hw *hw = &adapter->hw; @@ -766,7 +710,7 @@ static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter) /* disarm tx queues that have received xoff frames */ for (i = 0; i < adapter->num_tx_queues; i++) { struct ixgbe_ring *tx_ring = adapter->tx_ring[i]; - u32 tc = ixgbe_dcb_txq_to_tc(adapter, tx_ring->reg_idx); + u8 tc = tx_ring->dcb_tc; if (xoff[tc]) clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state); -- cgit v1.2.3