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ixgbevf: Add XDP frame size to VF driver 

This patch mirrors the changes to ixgbe in previous patch.

This VF driver doesn't support XDP_REDIRECT, but correct tailroom is
still necessary for BPF-helper xdp_adjust_tail.  In legacy-mode +
larger PAGE_SIZE, due to lacking tailroom, we accept that
xdp_adjust_tail shrink doesn't work.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: intel-wired-lan@lists.osuosl.org
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Link: https://lore.kernel.org/bpf/158945345984.97035.13518286183248025173.stgit@firesoul
This commit is contained in:
Jesper Dangaard Brouer 2020-05-14 12:50:59 +02:00 committed by Alexei Starovoitov
parent cf02512899
commit 81f3c6283c
1 changed files with 27 additions and 7 deletions
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34
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
View File

@ -1095,19 +1095,31 @@ static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
return ERR_PTR(-result);
}
static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring,
unsigned int size)
{
unsigned int truesize;
#if (PAGE_SIZE < 8192)
truesize = ixgbevf_rx_pg_size(rx_ring) / 2; /* Must be power-of-2 */
#else
truesize = ring_uses_build_skb(rx_ring) ?
SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) +
SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) :
SKB_DATA_ALIGN(size);
#endif
return truesize;
}
static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
struct ixgbevf_rx_buffer *rx_buffer,
unsigned int size)
{
#if (PAGE_SIZE < 8192)
unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
unsigned int truesize = ixgbevf_rx_frame_truesize(rx_ring, size);
#if (PAGE_SIZE < 8192)
rx_buffer->page_offset ^= truesize;
#else
unsigned int truesize = ring_uses_build_skb(rx_ring) ?
SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
SKB_DATA_ALIGN(size);
rx_buffer->page_offset += truesize;
#endif
}
@ -1125,6 +1137,11 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
xdp.rxq = &rx_ring->xdp_rxq;
/* Frame size depend on rx_ring setup when PAGE_SIZE=4K */
#if (PAGE_SIZE < 8192)
xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, 0);
#endif
while (likely(total_rx_packets < budget)) {
struct ixgbevf_rx_buffer *rx_buffer;
union ixgbe_adv_rx_desc *rx_desc;
@ -1157,7 +1174,10 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
xdp.data_hard_start = xdp.data -
ixgbevf_rx_offset(rx_ring);
xdp.data_end = xdp.data + size;
#if (PAGE_SIZE > 4096)
/* At larger PAGE_SIZE, frame_sz depend on len size */
xdp.frame_sz = ixgbevf_rx_frame_truesize(rx_ring, size);
#endif
skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
}