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ice, xsk: Avoid refilling single Rx descriptors

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Call alloc Rx routine for ZC driver only when the amount of unallocated
descriptors exceeds given threshold.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220413153015.453864-14-maciej.fijalkowski@intel.com
This commit is contained in:
Maciej Fijalkowski 2022-04-13 17:30:14 +02:00 committed by Daniel Borkmann
parent a817ead415
commit 4efad19616
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/intel/ice/ice_xsk.c
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@ -587,6 +587,7 @@ int ice_clean_rx_irq_zc(struct ice_rx_ring *rx_ring, int budget)
unsigned int xdp_xmit = 0;
struct bpf_prog *xdp_prog;
bool failure = false;
int entries_to_alloc;
/* ZC patch is enabled only when XDP program is set,
* so here it can not be NULL
@ -678,7 +679,9 @@ construct_skb:
ice_receive_skb(rx_ring, skb, vlan_tag);
}
failure |= !ice_alloc_rx_bufs_zc(rx_ring, ICE_DESC_UNUSED(rx_ring));
entries_to_alloc = ICE_DESC_UNUSED(rx_ring);
if (entries_to_alloc > ICE_RING_QUARTER(rx_ring))
failure |= !ice_alloc_rx_bufs_zc(rx_ring, entries_to_alloc);
ice_finalize_xdp_rx(xdp_ring, xdp_xmit);
ice_update_rx_ring_stats(rx_ring, total_rx_packets, total_rx_bytes);