ixgbe: add AF_XDP zero-copy Rx support

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This patch adds zero-copy Rx support for AF_XDP sockets. Instead of
allocating buffers of type MEM_TYPE_PAGE_SHARED, the Rx frames are
allocated as MEM_TYPE_ZERO_COPY when AF_XDP is enabled for a certain
queue.

All AF_XDP specific functions are added to a new file, ixgbe_xsk.c.

Note that when AF_XDP zero-copy is enabled, the XDP action XDP_PASS
will allocate a new buffer and copy the zero-copy frame prior passing
it to the kernel stack.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Tested-by: William Tu <u9012063@gmail.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 2018-10-02 10:00:32 +02:00 • committed by Jeff Kirsher

parent 46515fdb1a

commit d0bcacd0a1

6 changed files with 745 additions and 21 deletions

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3

drivers/net/ethernet/intel/ixgbe/Makefile

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27

drivers/net/ethernet/intel/ixgbe/ixgbe.h

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17

drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c

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78

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

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15

drivers/net/ethernet/intel/ixgbe/ixgbe_txrx_common.h

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626

drivers/net/ethernet/intel/ixgbe/ixgbe_xsk.c

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