[PATCH V2 net 0/4] net: fec: fix some issues of ndo_xdp_xmit()

[wei . fang]

From: Wei Fang <wei.fang@xxxxxxx>

We encountered some issues when testing the ndo_xdp_xmit() interface
of the fec driver on i.MX8MP and i.MX93 platforms. These issues are
easy to reproduce, and the specific reproduction steps are as follows.

step1: The ethernet port of a board (board A) is connected to the EQOS
port of i.MX8MP/i.MX93, and the FEC port of i.MX8MP/i.MX93 is connected
to another ethernet port, such as a switch port.

step2: Board A uses the pktgen_sample03_burst_single_flow.sh to generate
and send packets to i.MX8MP/i.MX93. The command is shown below.
./pktgen_sample03_burst_single_flow.sh -i eth0 -d 192.168.6.8 -m \
56:bf:0d:68:b0:9e -s 1500

step3: i.MX8MP/i.MX93 use the xdp_redirect bfp program to redirect the
XDP frames from EQOS port to FEC port. The command is shown below.
./xdp_redirect eth1 eth0

After a few moments, the warning or error logs will be printed in the
console, for more details, please refer to the commit message of each
patch.

Wei Fang (4):
  net: fec: dynamically set the NETDEV_XDP_ACT_NDO_XMIT feature of XDP
  net: fec: recycle pages for transmitted XDP frames
  net: fec: increase the size of tx ring and update tx_wake_threshold
  net: fec: use netdev_err_once() instead of netdev_err()

 drivers/net/ethernet/freescale/fec.h      |  17 ++-
 drivers/net/ethernet/freescale/fec_main.c | 166 +++++++++++++++-------
 2 files changed, 127 insertions(+), 56 deletions(-)

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2.25.1