ice: Allow 2 queue pairs per VF on SR-IOV initialization

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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@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

...

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Brett Creeley 2020-07-29 17:19:16 -07:00 • committed by Tony Nguyen

parent ec1d1d2302

commit f34f55557a

2 changed files with 3 additions and 0 deletions

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2

drivers/net/ethernet/intel/ice/ice_virtchnl_pf.c

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1

drivers/net/ethernet/intel/ice/ice_virtchnl_pf.h

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