another set of ppc405_enet changes

[Armin Kuster]

andrew may wrote:
>
> I wanted to limit this patch to be just a rework of the static var's but I
> ended up changing more things. I will attempt a summary of the changes.
> I did not compile/fix the stuff ifdef'd out by default.
>
> I attached the output from some runs with nttcp before and after the changes.
> It does not appear like there is any noticable change in performace from these
> changes. "-u" is for UDP "-r" is Rx'd on the 405GP Tx'd by my x86 box, "-t" is
> Tx'd by the 405GP Rx'd by the x86.
> One thing to look into would be the diff between UDP tx packets to the
> number rx'd on the other side. I don't know where the packets are being dropped
> now.
>
> Config.ini changed to CONFIG_PPC405_ENET to be tristate instead of just bool.
>
> Change NUM_RX to 32 and NUM_TX to 8. Doesn't change performace noticablely.
> Moved probe1 code into init function.
>
> kfree of private struct on module unload or failure to register netdevice.
>
> Used skb->len instead of tail-head in places.
>
> For both tx/rx eob int's clear reg first then loop through, instead of loop
> clear, goto top of loop again.
>
> Moved tx stat counts into tx eob from hard_xmit. In tx_eob moved netif_wake
> outside of loop.
>
> In rx_eob wait untill end of function to refill slots instead of after
> each packet. Also did skb_put instead of += tail and len. Put in check
> for dev_alloc_skb failure but still no recovery when OOM.
>


Andrew;

This look very similar to a previous patch from last week. Provide a
patch that represents addition work since then.  I have applied most of
your previous patches.  Please be patient,  this does not happen over
night.

regards,

Armin

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