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authorJohn Fastabend <john.r.fastabend@intel.com>2011-04-26 07:26:36 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-06-21 01:22:02 -0700
commitfb5475ff7f2e80e920a393d18a43b64124a30270 (patch)
treeb00ef8054e6b617807ec8a19fd0655066c663724 /drivers/net/ixgbe/ixgbe_main.c
parentb1bbdb206a52b7eb13c2e57ee794b90618f61002 (diff)
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 <john.r.fastabend@intel.com> Tested-by: Ross Brattain <ross.b.brattain@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ixgbe/ixgbe_main.c')
-rw-r--r--drivers/net/ixgbe/ixgbe_main.c58
1 files changed, 1 insertions, 57 deletions
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);