diff options
| author | Ben Greear <greearb@candelatech.com> | 2012-02-11 15:39:40 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-02-24 01:41:00 -0800 |
| commit | 943146de22d3658de26d94512beae7223282ed1c (patch) | |
| tree | e7746e0014e98579455225211e887935c488d27e | |
| parent | 3bdc0eba0b8b47797f4a76e377dd8360f317450f (diff) | |
e1000e: Support sending custom Ethernet CRC.
This can aid with testing the RX logic for bad
CRCs.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| -rw-r--r-- | drivers/net/ethernet/intel/e1000e/netdev.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 30c8c15d039..340442c4f38 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -4613,6 +4613,7 @@ link_up: #define E1000_TX_FLAGS_VLAN 0x00000002 #define E1000_TX_FLAGS_TSO 0x00000004 #define E1000_TX_FLAGS_IPV4 0x00000008 +#define E1000_TX_FLAGS_NO_FCS 0x00000010 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 #define E1000_TX_FLAGS_VLAN_SHIFT 16 @@ -4872,6 +4873,9 @@ static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); } + if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) + txd_lower &= ~(E1000_TXD_CMD_IFCS); + i = tx_ring->next_to_use; do { @@ -4889,6 +4893,10 @@ static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count) tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); + /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ + if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) + tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); + /* * Force memory writes to complete before letting h/w * know there are new descriptors to fetch. (Only @@ -5094,6 +5102,9 @@ static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, if (skb->protocol == htons(ETH_P_IP)) tx_flags |= E1000_TX_FLAGS_IPV4; + if (unlikely(skb->no_fcs)) + tx_flags |= E1000_TX_FLAGS_NO_FCS; + /* if count is 0 then mapping error has occurred */ count = e1000_tx_map(tx_ring, skb, first, max_per_txd, nr_frags, mss); if (count) { @@ -6221,6 +6232,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev, /* Set user-changeable features (subset of all device features) */ netdev->hw_features = netdev->features; netdev->hw_features |= NETIF_F_RXFCS; + netdev->priv_flags |= IFF_SUPP_NOFCS; if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) netdev->features |= NETIF_F_HW_VLAN_FILTER; |