[PATCH v3 05/16] e100: Support sending custom Ethernet CRC
From: <hidden>
Date: 2012-02-11 01:05:33
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Ben Greear <redacted> This can aid with testing the RX logic for bad CRCs. Signed-off-by: Ben Greear <redacted> --- :100644 100644 1fd4603... 249ca59... M drivers/net/ethernet/intel/e100.c 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 1fd4603..249ca59 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);
@@ -2777,6 +2792,7 @@ 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);
--
1.7.3.4