Re: [dpdk-dev] [PATCH v3 0/3] enhance TX checksum command and csum forwarding engine

["Liu, Jijiang" <jijiang.liu@intel.com>]

Hi,

> -----Original Message-----
> From: Olivier MATZ [mailto:olivier.matz@6wind.com]
> Sent: Wednesday, January 21, 2015 2:16 AM
> To: Ananyev, Konstantin; Liu, Jijiang
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v3 0/3] enhance TX checksum command and
> csum forwarding engine
> 
> 
> 
> >>> Ok, and why it should be our problem?
> >>> We have a lot of things done in a different manner then
> >>> linux/freebsd kernel drivers, Why now it became a problem?
> >>
> >> If linux doesn't need an equivalent flag for doing the same thing, it
> >> probably means we don't need it either.
> >
> > Probably yes .... Or probably not.
> > Why do we need to guess what was the intention of guys who wrote that
> part of linux driver?
> 
> Because the dpdk looks very similar to that part of linux driver.

A  guy from Intel  who have already confirmed that the NVGRE is not supported yet in Linux kernel.
  
He said "So far as I know it is not yet supported and I have no information on when it will be."

> > BTW, the macro for GRE is here:
> > find lib/librte_pmd_i40e/i40e -type f | xargs grep TUN | grep TXD
> > lib/librte_pmd_i40e/i40e/i40e_type.h:#define
> > I40E_TXD_CTX_UDP_TUNNELING (0x1ULL <<
> I40E_TXD_CTX_QW0_NATT_SHIFT)
> > lib/librte_pmd_i40e/i40e/i40e_type.h:#define
> > I40E_TXD_CTX_GRE_TUNNELING (0x2ULL <<
> I40E_TXD_CTX_QW0_NATT_SHIFT)
> >
> > Though it not used (yet?) by some reason.
> >
> >>
> 
> Regards,
> Olivier