Subject: Re: [PATCH 3/3] NetXen: 64-bit memory fixes, driver cleanup

From: Sanjeev Jorapur <[email-masked]>
Date: Sat, 18 Nov 2006 15:58:09 +0530

On Fri, 2006-11-17 at 08:40 -0800, Stephen Hemminger wrote:
> On Fri, 17 Nov 2006 07:36:03 -0800
> "Linsys Contractor Amit S. Kale" <[email-masked]> wrote:
> 
> > NetXen: 1G/10G Ethernet Driver updates
> > 	- These fixes take care of driver on machines with >4G memory
> > 	- Driver cleanup
> > 
> > Signed-off-by: Amit S. Kale <[email-masked]>
> > 
> >  netxen_nic.h          |   41 ++++++----
> >  netxen_nic_ethtool.c  |   19 ++--
> >  netxen_nic_hw.c       |   10 +-
> >  netxen_nic_hw.h       |    4 
> >  netxen_nic_init.c     |   51 +++++++++++-
> >  netxen_nic_isr.c      |    3 
> >  netxen_nic_main.c     |  204 +++++++++++++++++++++++++++++++++++++++++++++++---
> >  netxen_nic_phan_reg.h |   10 +-
> >  8 files changed, 293 insertions(+), 49 deletions(-)
> > 
> 
> 
> If you can't DMA from high memory, then don't set NETIF_F_HIGHDMA, why do
> you need explicit bounce buffers.  If you can't DMA from unaligned address,
> the write a small routine to copy the skb to a new one.

The hardware supports DMA into 35 bit addresses. The intent is to
enable DMA into addresses upto 32G.

Sanjeev.