i40e: add xdp_buff to i40e_ring struct

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Store xdp_buff on Rx ring struct in preparation for XDP multi-buffer
support. This will allow us to combine fragmented frames across
separate NAPI cycles in the same way as currently skb fragments are
handled. This means that skb pointer on Rx ring will become redundant
and will be removed in a later patch. As a consequence i40e_trace() now
uses xdp instead of skb pointer.

Truesize only needs to be calculated for page sizes bigger than 4k as it
is always half-page for 4k pages. With xdp_buff on ring, frame size can
now be set during xdp_init_buff() and need not be repopulated in each
NAPI call for 4k pages. As a consequence i40e_rx_frame_truesize() is now
used only for bigger pages.

Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

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This commit is contained in:

Tirthendu Sarkar 2023-03-10 00:26:14 +05:30 • committed by Tony Nguyen

parent e9031f2da1

commit 01aa49e31e

4 changed files with 32 additions and 30 deletions

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2

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

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20

drivers/net/ethernet/intel/i40e/i40e_trace.h

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33

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

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7

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

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