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i40e: split XDP_TX tail and XDP_REDIRECT map flushing

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The driver was combining the XDP_TX tail flush and XDP_REDIRECT
map flushing (xdp_do_flush_map).  This is suboptimal, these two
flush operations should be kept separate.

It looks like the mistake was copy-pasted from ixgbe.

Fixes: d9314c474d ("i40e: add support for XDP_REDIRECT")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jesper Dangaard Brouer 2018-06-26 17:39:53 +02:00 committed by David S. Miller
parent ad088ec480
commit 2e68931238
1 changed files with 15 additions and 9 deletions
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22
drivers/net/ethernet/intel/i40e/i40e_txrx.c
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@ -2200,8 +2200,9 @@ static bool i40e_is_non_eop(struct i40e_ring *rx_ring,
}
#define I40E_XDP_PASS 0
#define I40E_XDP_CONSUMED 1
#define I40E_XDP_TX 2
#define I40E_XDP_CONSUMED BIT(0)
#define I40E_XDP_TX BIT(1)
#define I40E_XDP_REDIR BIT(2)
static int i40e_xmit_xdp_ring(struct xdp_frame *xdpf,
struct i40e_ring *xdp_ring);
@ -2248,7 +2249,7 @@ static struct sk_buff *i40e_run_xdp(struct i40e_ring *rx_ring,
break;
case XDP_REDIRECT:
err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
result = !err ? I40E_XDP_TX : I40E_XDP_CONSUMED;
result = !err ? I40E_XDP_REDIR : I40E_XDP_CONSUMED;
break;
default:
bpf_warn_invalid_xdp_action(act);
@ -2311,7 +2312,8 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
unsigned int total_rx_bytes = 0, total_rx_packets = 0;
struct sk_buff *skb = rx_ring->skb;
u16 cleaned_count = I40E_DESC_UNUSED(rx_ring);
bool failure = false, xdp_xmit = false;
unsigned int xdp_xmit = 0;
bool failure = false;
struct xdp_buff xdp;
xdp.rxq = &rx_ring->xdp_rxq;
@ -2372,8 +2374,10 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
}
if (IS_ERR(skb)) {
if (PTR_ERR(skb) == -I40E_XDP_TX) {
xdp_xmit = true;
unsigned int xdp_res = -PTR_ERR(skb);
if (xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR)) {
xdp_xmit |= xdp_res;
i40e_rx_buffer_flip(rx_ring, rx_buffer, size);
} else {
rx_buffer->pagecnt_bias++;
@ -2427,12 +2431,14 @@ static int i40e_clean_rx_irq(struct i40e_ring *rx_ring, int budget)
total_rx_packets++;
}
if (xdp_xmit) {
if (xdp_xmit & I40E_XDP_REDIR)
xdp_do_flush_map();
if (xdp_xmit & I40E_XDP_TX) {
struct i40e_ring *xdp_ring =
rx_ring->vsi->xdp_rings[rx_ring->queue_index];
i40e_xdp_ring_update_tail(xdp_ring);
xdp_do_flush_map();
}
rx_ring->skb = skb;