i40e: clean zero-copy XDP Tx ring on shutdown/reset

Browse source

When the zero-copy enabled XDP Tx ring is torn down, due to
configuration changes, outstanding frames on the hardware descriptor
ring are queued on the completion ring.

The completion ring has a back-pressure mechanism that will guarantee
that there is sufficient space on the ring.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

...

This commit is contained in:

Björn Töpel 2018-09-07 10:18:45 +02:00 • committed by Jeff Kirsher

parent 679b05c053

commit 9dbb137045

3 changed files with 43 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

17

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

View file

2

drivers/net/ethernet/intel/i40e/i40e_txrx_common.h

View file

30

drivers/net/ethernet/intel/i40e/i40e_xsk.c

View file