i40e/i40evf: enable hardware feature head write back

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The hardware supports a feature to avoid updating the descriptor
ring by marking each descriptor with a DD bit, and instead
writes a memory location with an update to where the driver
should clean up to.  Enable this feature.

Change-ID: I5da4e0681f0b581a6401c950a81808792267fe57
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

This commit is contained in:

Jesse Brandeburg 2014-02-14 02:14:40 +00:00 • committed by Jeff Kirsher

parent 6c167f582e

commit 1943d8ba95

4 changed files with 88 additions and 12 deletions

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5

drivers/net/ethernet/intel/i40e/i40e_main.c

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46

drivers/net/ethernet/intel/i40e/i40e_txrx.c

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3

drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c

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46

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

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