ixgb: add performance enhancements to the buffer_info struct

o modify the rx refill logic and tail bump
o add counter for failures

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

2 files changed