diff options
| author | Ben Greear <greearb@candelatech.com> | 2012-02-11 15:39:35 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2012-02-29 22:59:53 -0800 |
| commit | 75f58a537674cdff2122789cfd3cc7a76956ece5 (patch) | |
| tree | 218c736e7ec39fc7ab3e5f98e5d45f819b07f73e | |
| parent | 719cdac54e0237837251a32a3d690bfe9c1e9bed (diff) | |
| download | linux-75f58a537674cdff2122789cfd3cc7a76956ece5.tar.bz2 | |
e100: 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/e100.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/e100.c b/drivers/net/ethernet/intel/e100.c index 3ecbdedf6135..6f9f70a04474 100644 --- a/drivers/net/ethernet/intel/e100.c +++ b/drivers/net/ethernet/intel/e100.c @@ -412,6 +412,10 @@ enum cb_status { cb_ok = 0x2000, }; +/** + * cb_command - Command Block flags + * @cb_tx_nc: 0: controler does CRC (normal), 1: CRC from skb memory + */ enum cb_command { cb_nop = 0x0000, cb_iaaddr = 0x0001, @@ -421,6 +425,7 @@ enum cb_command { cb_ucode = 0x0005, cb_dump = 0x0006, cb_tx_sf = 0x0008, + cb_tx_nc = 0x0010, cb_cid = 0x1f00, cb_i = 0x2000, cb_s = 0x4000, @@ -1724,6 +1729,16 @@ static void e100_xmit_prepare(struct nic *nic, struct cb *cb, struct sk_buff *skb) { cb->command = nic->tx_command; + + /* + * Use the last 4 bytes of the SKB payload packet as the CRC, used for + * testing, ie sending frames with bad CRC. + */ + if (unlikely(skb->no_fcs)) + cb->command |= __constant_cpu_to_le16(cb_tx_nc); + else + cb->command &= ~__constant_cpu_to_le16(cb_tx_nc); + /* interrupt every 16 packets regardless of delay */ if ((nic->cbs_avail & ~15) == nic->cbs_avail) cb->command |= cpu_to_le16(cb_i); @@ -2778,6 +2793,7 @@ static int __devinit e100_probe(struct pci_dev *pdev, return -ENOMEM; netdev->hw_features |= NETIF_F_RXFCS; + netdev->priv_flags |= IFF_SUPP_NOFCS; netdev->netdev_ops = &e100_netdev_ops; SET_ETHTOOL_OPS(netdev, &e100_ethtool_ops); |