RE: [PATCH v4 1/3] ixgbe, ixgbevf: Add new mbox API to enable MC promiscuous mode

[Schmitt, Phillip J]

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@xxxxxxxxxxxxxxxx] On
> Behalf Of Hiroshi Shimamoto
> Sent: Thursday, April 09, 2015 6:04 PM
> To: Kirsher, Jeffrey T; Alexander Duyck; intel-wired-lan
> Cc: vyasevic@xxxxxxxxxx; e1000-devel@xxxxxxxxxxxxxxxxxxxxx;
> netdev@xxxxxxxxxxxxxxx; Choi, Sy Jong; linux-kernel@xxxxxxxxxxxxxxx; David
> Laight; Hayato Momma; Edward Cree; Or Gerlitz; Bjørn Mork
> Subject: [Intel-wired-lan] [PATCH v4 1/3] ixgbe, ixgbevf: Add new mbox API to
> enable MC promiscuous mode
> 
> From: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>
> 
> The limitation of the number of multicast address for VF is not enough for the
> large scale server with SR-IOV feature.
> IPv6 requires the multicast MAC address for each IP address to handle the
> Neighbor Solicitation message.
> We couldn't assign over 30 IPv6 addresses to a single VF interface.
> 
> The easy way to solve this is enabling multicast promiscuous mode.
> It is good to have a functionality to enable multicast promiscuous mode for each
> VF from VF driver.
> 
> This patch introduces the new mbox API, IXGBE_VF_SET_MC_PROMISC, to
> enable/disable multicast promiscuous mode in VF. If multicast promiscuous
> mode is enabled the VF can receive all multicast packets.
> 
> With this patch, the ixgbevf driver automatically enable multicast promiscuous
> mode when the number of multicast addresses is over than 30 if possible.
> 
> Signed-off-by: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>
> Reviewed-by: Hayato Momma <h-momma@xxxxxxxxxxxxx>
> CC: Choi, Sy Jong <sy.jong.choi@xxxxxxxxx>
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe.h          |  1 +
>  drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h      |  2 +
>  drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c    | 76
> +++++++++++++++++++++++
>  drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c |  3 +
>  drivers/net/ethernet/intel/ixgbevf/mbx.h          |  2 +
>  drivers/net/ethernet/intel/ixgbevf/vf.c           | 27 +++++++-
>  drivers/net/ethernet/intel/ixgbevf/vf.h           |  1 +
>  7 files changed, 111 insertions(+), 1 deletion(-)

Tested-by: Phil Schmitt <phillip.j.schmitt@xxxxxxxxx>
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