[Intel-wired-lan] [PATCH S51 07/13] ice: Allow 2 queue pairs per VF on SR-IOV initialization

[Bowers, AndrewX]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Tony Nguyen
> Sent: Wednesday, July 29, 2020 5:19 PM
> To: intel-wired-lan at lists.osuosl.org
> Subject: [Intel-wired-lan] [PATCH S51 07/13] ice: Allow 2 queue pairs per VF
> on SR-IOV initialization
> 
> From: Brett Creeley <brett.creeley at intel.com>
> 
> Currently VFs are only allowed to get 16, 4, and 1 queue pair by default,
> which require 17, 5, and 2 MSI-X vectors respectively. This is because each VF
> needs a MSI-X per data queue and a MSI-X for its other interrupt. The
> calculation is based on the number of VFs created, MSI-X available, and
> queue pairs available at the time of VF creation.
> 
> Unfortunately the values above exclude 2 queue pairs when only 3 MSI-X are
> available to each VF based on resource constraints. The current calculation
> would default to 2 MSI-X and 1 queue pair. This is a waste of resources, so fix
> this by allowing 2 queue pairs per VF when there are between 2 and 5 MSI-X
> available per VF.
> 
> Signed-off-by: Brett Creeley <brett.creeley at intel.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c | 2 ++
> drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h | 1 +
>  2 files changed, 3 insertions(+)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>