From a498d7076ee0f82ec3f508293a9cf1ccba15829e Mon Sep 17 00:00:00 2001 From: Daniel Hellstrom Date: Wed, 1 Dec 2010 16:52:19 +0100 Subject: [PATCH] GRETH: added greth_compat_mode module parameter The greth_compat_mode option can be used to set a GRETH GBit capable MAC in operate as if the GRETH 10/100 device was found. The GRETH GBit supports TCP/UDP checksum offloading, unaligned frame buffers, scatter gather etc. Enabling this mode allows the developer to test the GRETH 10/100 device without all features mentioned above on a GBit MAC capable of the above. Signed-off-by: Daniel Hellstrom --- drivers/net/greth.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) --- a/drivers/net/greth.c +++ b/drivers/net/greth.c @@ -70,6 +70,11 @@ static int no_gbit = 0; module_param(no_gbit, int, S_IRUGO); MODULE_PARM_DESC(no_gbit, "GRETH report GBit not supported by MAC enable. Only affects GRETH GBit MAC, default 0 (off)."); +/* Use this option to enable GRETH 10/100 code on GRETH_GBIT hardware (debug legacy code option) */ +static int compat_mode = 0; +module_param(compat_mode, int, S_IRUGO); +MODULE_PARM_DESC(compat_mode, "GRETH 10/100 legacy mode enable. Only affects GRETH GBit MAC, default 0 (off)."); + static int greth_open(struct net_device *dev); static netdev_tx_t greth_start_xmit(struct sk_buff *skb, struct net_device *dev); @@ -1452,6 +1457,10 @@ static int __devinit greth_of_probe(stru else greth->gbit_phy_support = 0; + /* Force GBit MAC in legacy 10/100 mode (no offloading etc.) */ + if (compat_mode == 1) + greth->gbit_mac = 0; + /* Check for multicast capability */ greth->multicast = (tmp >> 25) & 1;