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net: ethernet: enetc: unlock XDP_REDIRECT for XDP non-linear buffers

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Even if full XDP_REDIRECT is not supported yet for non-linear XDP buffers
since we allow redirecting just into CPUMAPs, unlock XDP_REDIRECT for
S/G XDP buffer and rely on XDP stack to properly take care of the
frames.

Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Lorenzo Bianconi
2023-01-04 14:57:10 +01:00
committed by Jakub Kicinski
parent 4aea86b403
commit 8feb020f92
1 changed files with 10 additions and 14 deletions
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24
drivers/net/ethernet/freescale/enetc/enetc.c
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@@ -1412,6 +1412,16 @@ static void enetc_add_rx_buff_to_xdp(struct enetc_bdr *rx_ring, int i,
/* To be used for XDP_TX */
rx_swbd->len = size;
if (!xdp_buff_has_frags(xdp_buff)) {
xdp_buff_set_frags_flag(xdp_buff);
shinfo->xdp_frags_size = size;
} else {
shinfo->xdp_frags_size += size;
}
if (page_is_pfmemalloc(rx_swbd->page))
xdp_buff_set_frag_pfmemalloc(xdp_buff);
skb_frag_off_set(frag, rx_swbd->page_offset);
skb_frag_size_set(frag, size);
__skb_frag_set_page(frag, rx_swbd->page);
@@ -1584,20 +1594,6 @@ static int enetc_clean_rx_ring_xdp(struct enetc_bdr *rx_ring,
}
break;
case XDP_REDIRECT:
/* xdp_return_frame does not support S/G in the sense
* that it leaks the fragments (__xdp_return should not
* call page_frag_free only for the initial buffer).
* Until XDP_REDIRECT gains support for S/G let's keep
* the code structure in place, but dead. We drop the
* S/G frames ourselves to avoid memory leaks which
* would otherwise leave the kernel OOM.
*/
if (unlikely(cleaned_cnt - orig_cleaned_cnt != 1)) {
enetc_xdp_drop(rx_ring, orig_i, i);
rx_ring->stats.xdp_redirect_sg++;
break;
}
err = xdp_do_redirect(rx_ring->ndev, &xdp_buff, prog);
if (unlikely(err)) {
enetc_xdp_drop(rx_ring, orig_i, i);