Problem with PPC 440 GX Transmit Path

Problem with PPC 440 GX Transmit Path

[linuxppc]

I have found a problem with the driver for the PPC440GX (ibm_emac), while
reading from the PPC (OCOTEA) BOX doesn't always transmit the last packet, I
have managed to get it to continue by pinging it or from it, or if the root
filesystem is mounted as nfs (I am assuming communications using nfs use a
keepalive test or equivalent). I have also found that by turning on the
debug options in ibm_emac_core.c (PKT_DEBUG) fixes the problem!! I have
removed all but one of the debug messages and as long as they are in the tx
functions (not the rx functions) I have no problems. Any help or guidance
will be appreciated, for now I am going to try and implement gdb.....

Daren

Re: Problem with PPC 440 GX Transmit Path

[Jon Masters]

On Thu, 21 Oct 2004 15:20:55 +0100, linuxppc <linuxppc@4bridgeworks.com> wrote:

> Any help or guidance
> will be appreciated, for now I am going to try and implement gdb.....

Perhaps *any* form of useful output or description would be useful.
Could you please provide the specific line of debugging that you need
to retain at least?

Jon.

RE: Problem with PPC 440 GX Transmit Path

[Daren Hayward]

> Perhaps *any* form of useful output or description would be useful.
> Could you please provide the specific line of debugging that you need
> to retain at least?

Amy of the following

PKT_DEBUG(("emac_txeob_dev() entry, tx_cnt %d", fep->tx_cnt));
PKT_DEBUG(("emac_txeob_dev() exit, tx_cnt %d", fep->tx_cnt));
PKT_DEBUG(("emac_start_xmit() exitn"));

Daren

Re: Problem with PPC 440 GX Transmit Path

[Eugene Surovegin]

On Thu, Oct 21, 2004 at 03:20:55PM +0100, linuxppc wrote:
> I have found a problem with the driver for the PPC440GX (ibm_emac), while
> reading from the PPC (OCOTEA) BOX doesn't always transmit the last packet, I
> have managed to get it to continue by pinging it or from it, or if the root
> filesystem is mounted as nfs (I am assuming communications using nfs use a
> keepalive test or equivalent). I have also found that by turning on the
> debug options in ibm_emac_core.c (PKT_DEBUG) fixes the problem!! I have
> removed all but one of the debug messages and as long as they are in the tx
> functions (not the rx functions) I have no problems. Any help or guidance
> will be appreciated, for now I am going to try and implement gdb.....

Which kernel version you are using?

--
Eugene

RE: Problem with PPC 440 GX Transmit Path

[Daren Hayward]

Version 2.6.9-rc4

-----Original Message-----
From: Eugene Surovegin [mailto:ebs@ebshome.net]
Sent: 21 October 2004 18:49
To: linuxppc
Cc: Linux PPC Dev
Subject: Re: Problem with PPC 440 GX Transmit Path


On Thu, Oct 21, 2004 at 03:20:55PM +0100, linuxppc wrote:
> I have found a problem with the driver for the PPC440GX (ibm_emac), while
> reading from the PPC (OCOTEA) BOX doesn't always transmit the last packet,
I
> have managed to get it to continue by pinging it or from it, or if the
root
> filesystem is mounted as nfs (I am assuming communications using nfs use a
> keepalive test or equivalent). I have also found that by turning on the
> debug options in ibm_emac_core.c (PKT_DEBUG) fixes the problem!! I have
> removed all but one of the debug messages and as long as they are in the
tx
> functions (not the rx functions) I have no problems. Any help or guidance
> will be appreciated, for now I am going to try and implement gdb.....

Which kernel version you are using?

--
Eugene