net: stmmac: Add support for XDP_REDIRECT action

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This patch adds the support of XDP_REDIRECT to another remote cpu for
further action. It also implements ndo_xdp_xmit ops, enabling the driver
to transmit packets forwarded to it by XDP program running on another
interface.

This patch has been tested using "xdp_redirect_cpu" for XDP_REDIRECT
+ drop testing. It also been tested with "xdp_redirect" sample app
which can be used to exercise ndo_xdp_xmit ops. The burst traffics are
generated using pktgen_sample03_burst_single_flow.sh in samples/pktgen
directory.

v4: Move xdp_do_flush() processing into stmmac_finalize_xdp_rx() and
    combined the XDP verdict of XDP TX and REDIRECT together.

v3: Added 'nq->trans_start = jiffies' to avoid TX time-out as we are
    sharing TX queue between slow path and XDP. Thanks to Jakub Kicinski
    for point out.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Ong Boon Leong 2021-04-01 10:11:17 +08:00 • committed by David S. Miller

parent be8b38a722

commit 8b278a5b69

2 changed files with 84 additions and 11 deletions

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1

drivers/net/ethernet/stmicro/stmmac/stmmac.h

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94

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

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