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Merge branch 'tsnep-xdp-fixes'

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Gerhard Engleder says:

====================
tsnep: XDP fixes

Found two driver specific problems during XDP and XSK testing.
====================

Link: https://lore.kernel.org/r/20240123200918.61219-1-gerhard@engleder-embedded.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Paolo Abeni 2024-01-25 11:59:44 +01:00
commit 0a5bd0ffe7
1 changed files with 15 additions and 2 deletions
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17
drivers/net/ethernet/engleder/tsnep_main.c
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@ -1485,7 +1485,7 @@ static int tsnep_rx_poll(struct tsnep_rx *rx, struct napi_struct *napi,
xdp_prepare_buff(&xdp, page_address(entry->page),
XDP_PACKET_HEADROOM + TSNEP_RX_INLINE_METADATA_SIZE,
length, false);
length - ETH_FCS_LEN, false);
consume = tsnep_xdp_run_prog(rx, prog, &xdp,
&xdp_status, tx_nq, tx);
@ -1568,7 +1568,7 @@ static int tsnep_rx_poll_zc(struct tsnep_rx *rx, struct napi_struct *napi,
prefetch(entry->xdp->data);
length = __le32_to_cpu(entry->desc_wb->properties) &
TSNEP_DESC_LENGTH_MASK;
xsk_buff_set_size(entry->xdp, length);
xsk_buff_set_size(entry->xdp, length - ETH_FCS_LEN);
xsk_buff_dma_sync_for_cpu(entry->xdp, rx->xsk_pool);
/* RX metadata with timestamps is in front of actual data,
@ -1762,6 +1762,19 @@ static void tsnep_rx_reopen_xsk(struct tsnep_rx *rx)
allocated--;
}
}
/* set need wakeup flag immediately if ring is not filled completely,
* first polling would be too late as need wakeup signalisation would
* be delayed for an indefinite time
*/
if (xsk_uses_need_wakeup(rx->xsk_pool)) {
int desc_available = tsnep_rx_desc_available(rx);
if (desc_available)
xsk_set_rx_need_wakeup(rx->xsk_pool);
else
xsk_clear_rx_need_wakeup(rx->xsk_pool);
}
}
static bool tsnep_pending(struct tsnep_queue *queue)