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Commit 75f58a53 authored by Ben Greear's avatar Ben Greear Committed by Jeff Kirsher
Browse files

e100: Support sending custom Ethernet CRC 



This can aid with testing the RX logic for bad
CRCs.

Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 719cdac5

drivers/net/ethernet/intel/e100.c

+16 −0
Original line number Diff line number Diff line
@@ -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);