[Intel-wired-lan] [intel-wired-lan][net-next PATCH S07 06/10] i40e/i40evf: Add support for writeback on ITR feature for X722

Young, James M james.m.young at intel.com
Thu Jul 2 17:28:03 UTC 2015


> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On
> Behalf Of Catherine Sullivan
> Sent: Friday, June 05, 2015 9:21 AM
> To: intel-wired-lan at lists.osuosl.org
> Cc: Singhai, Anjali
> Subject: [Intel-wired-lan] [intel-wired-lan][net-next PATCH S07 06/10]
> i40e/i40evf: Add support for writeback on ITR feature for X722
> 
> From: Anjali Singhai Jain <anjali.singhai at intel.com>
> 
> X722 fixes an issue from X710 where TX descriptor WB would not hapen if the
> interrupts were disabled. In order for the write backs to happen a bit needs
> to be set in the dynamic interrupt control register called WB_ON_ITR. With
> this feature, the SW driver need not arm SW interrupts to work around the
> issue in X710.
> 
> Signed-off-by: Anjali Singhai Jain <anjali.singhai at intel.com>
> Signed-off-by: Catherine Sullivan <catherine.sullivan at intel.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e.h        |  1 +
>  drivers/net/ethernet/intel/i40e/i40e_main.c   |  2 ++
>  drivers/net/ethernet/intel/i40e/i40e_txrx.c   | 46
> +++++++++++++++++++++------
>  drivers/net/ethernet/intel/i40e/i40e_txrx.h   |  2 ++
>  drivers/net/ethernet/intel/i40evf/i40e_txrx.c | 38 ++++++++++++++++------
> drivers/net/ethernet/intel/i40evf/i40e_txrx.h |  2 ++
>  drivers/net/ethernet/intel/i40evf/i40evf.h    |  1 +
>  7 files changed, 74 insertions(+), 18 deletions(-)
> 

Tested-by: Jim Young <james.m.young at intel.com>



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