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ixgbe: Rewrite code related to configuring IFCS bit in Tx descriptor 

This change updates the code related to configuring the transmit frame
checksum.  Specifically I have updated the code so that we can only skip
inserting the checksum in the case that we are not performing some other
offload that will modify the frame data.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
This commit is contained in:
Alexander Duyck 2012-07-20 08:09:01 +00:00 committed by Peter P Waskiewicz Jr
parent 5a02cbd10d
commit 62748b7bde
2 changed files with 11 additions and 6 deletions
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1
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -107,6 +107,7 @@
#define IXGBE_TX_FLAGS_FSO (u32)(1 << 6)
#define IXGBE_TX_FLAGS_TXSW (u32)(1 << 7)
#define IXGBE_TX_FLAGS_TSTAMP (u32)(1 << 8)
#define IXGBE_TX_FLAGS_NO_IFCS (u32)(1 << 9)
#define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
#define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0xe0000000
#define IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT 29

14
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -5903,9 +5903,12 @@ static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
u32 type_tucmd = 0;
if (skb->ip_summed != CHECKSUM_PARTIAL) {
if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
!(first->tx_flags & IXGBE_TX_FLAGS_TXSW))
if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN)) {
if (unlikely(skb->no_fcs))
first->tx_flags |= IXGBE_TX_FLAGS_NO_IFCS;
if (!(first->tx_flags & IXGBE_TX_FLAGS_TXSW))
return;
}
} else {
u8 l4_hdr = 0;
switch (first->protocol) {
@ -5967,7 +5970,6 @@ static __le32 ixgbe_tx_cmd_type(u32 tx_flags)
{
/* set type for advanced descriptor with frame checksum insertion */
__le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
IXGBE_ADVTXD_DCMD_IFCS |
IXGBE_ADVTXD_DCMD_DEXT);
/* set HW vlan bit if vlan is present */
@ -5987,6 +5989,10 @@ static __le32 ixgbe_tx_cmd_type(u32 tx_flags)
#endif
cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
/* insert frame checksum */
if (!(tx_flags & IXGBE_TX_FLAGS_NO_IFCS))
cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_IFCS);
return cmd_type;
}
@ -6092,8 +6098,6 @@ static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
if (likely(!data_len))
break;
if (unlikely(skb->no_fcs))
cmd_type &= ~(cpu_to_le32(IXGBE_ADVTXD_DCMD_IFCS));
tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
i++;