diff options
author | Lorenzo Bianconi <lorenzo@kernel.org> | 2021-03-08 14:06:58 +0300 |
---|---|---|
committer | Daniel Borkmann <daniel@iogearbox.net> | 2021-03-18 18:38:51 +0300 |
commit | fdc13979f91e664717f47eb8c49094e4b7f202e3 (patch) | |
tree | 453bf46ea6d3314d4c61a31651c87a066370f2b4 /drivers/net/ethernet/sfc/tx.c | |
parent | 6b28276512fdfc010e25c833973328e51a56eafb (diff) | |
download | linux-fdc13979f91e664717f47eb8c49094e4b7f202e3.tar.xz |
bpf, devmap: Move drop error path to devmap for XDP_REDIRECT
We want to change the current ndo_xdp_xmit drop semantics because it will
allow us to implement better queue overflow handling. This is working
towards the larger goal of a XDP TX queue-hook. Move XDP_REDIRECT error
path handling from each XDP ethernet driver to devmap code. According to
the new APIs, the driver running the ndo_xdp_xmit pointer, will break tx
loop whenever the hw reports a tx error and it will just return to devmap
caller the number of successfully transmitted frames. It will be devmap
responsibility to free dropped frames.
Move each XDP ndo_xdp_xmit capable driver to the new APIs:
- veth
- virtio-net
- mvneta
- mvpp2
- socionext
- amazon ena
- bnxt
- freescale (dpaa2, dpaa)
- xen-frontend
- qede
- ice
- igb
- ixgbe
- i40e
- mlx5
- ti (cpsw, cpsw-new)
- tun
- sfc
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Camelia Groza <camelia.groza@nxp.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Shay Agroskin <shayagr@amazon.com>
Link: https://lore.kernel.org/bpf/ed670de24f951cfd77590decf0229a0ad7fd12f6.1615201152.git.lorenzo@kernel.org
Diffstat (limited to 'drivers/net/ethernet/sfc/tx.c')
-rw-r--r-- | drivers/net/ethernet/sfc/tx.c | 15 |
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/net/ethernet/sfc/tx.c b/drivers/net/ethernet/sfc/tx.c index 1665529a7271..0c6650d2e239 100644 --- a/drivers/net/ethernet/sfc/tx.c +++ b/drivers/net/ethernet/sfc/tx.c @@ -412,14 +412,6 @@ err: return NETDEV_TX_OK; } -static void efx_xdp_return_frames(int n, struct xdp_frame **xdpfs) -{ - int i; - - for (i = 0; i < n; i++) - xdp_return_frame_rx_napi(xdpfs[i]); -} - /* Transmit a packet from an XDP buffer * * Returns number of packets sent on success, error code otherwise. @@ -492,12 +484,7 @@ int efx_xdp_tx_buffers(struct efx_nic *efx, int n, struct xdp_frame **xdpfs, if (flush && i > 0) efx_nic_push_buffers(tx_queue); - if (i == 0) - return -EIO; - - efx_xdp_return_frames(n - i, xdpfs + i); - - return i; + return i == 0 ? -EIO : i; } /* Initiate a packet transmission. We use one channel per CPU |