@@ -20,6 +20,7 @@ void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val);
#define I40E_XDP_CONSUMED BIT(0)
#define I40E_XDP_TX BIT(1)
#define I40E_XDP_REDIR BIT(2)
+#define I40E_XDP_EXIT BIT(3)
/*
* build_ctob - Builds the Tx descriptor (cmd, offset and type) qword
@@ -161,9 +161,13 @@ static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
if (likely(act == XDP_REDIRECT)) {
err = xdp_do_redirect(rx_ring->netdev, xdp, xdp_prog);
- if (err)
- goto out_failure;
- return I40E_XDP_REDIR;
+ if (!err)
+ return I40E_XDP_REDIR;
+ if (xsk_uses_need_wakeup(rx_ring->xsk_pool) && err == -ENOBUFS)
+ result = I40E_XDP_EXIT;
+ else
+ result = I40E_XDP_CONSUMED;
+ goto out_failure;
}
switch (act) {
@@ -175,16 +179,17 @@ static int i40e_run_xdp_zc(struct i40e_ring *rx_ring, struct xdp_buff *xdp)
if (result == I40E_XDP_CONSUMED)
goto out_failure;
break;
+ case XDP_DROP:
+ result = I40E_XDP_CONSUMED;
+ break;
default:
bpf_warn_invalid_xdp_action(rx_ring->netdev, xdp_prog, act);
fallthrough;
case XDP_ABORTED:
+ result = I40E_XDP_CONSUMED;
out_failure:
trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
fallthrough; /* handle aborts by dropping packet */
- case XDP_DROP:
- result = I40E_XDP_CONSUMED;
- break;
}
return result;
}
@@ -271,7 +276,8 @@ static void i40e_handle_xdp_result_zc(struct i40e_ring *rx_ring,
unsigned int *rx_packets,
unsigned int *rx_bytes,
unsigned int size,
- unsigned int xdp_res)
+ unsigned int xdp_res,
+ bool *failure)
{
struct sk_buff *skb;
@@ -281,11 +287,15 @@ static void i40e_handle_xdp_result_zc(struct i40e_ring *rx_ring,
if (likely(xdp_res == I40E_XDP_REDIR) || xdp_res == I40E_XDP_TX)
return;
+ if (xdp_res == I40E_XDP_EXIT) {
+ *failure = true;
+ return;
+ }
+
if (xdp_res == I40E_XDP_CONSUMED) {
xsk_buff_free(xdp_buff);
return;
}
-
if (xdp_res == I40E_XDP_PASS) {
/* NB! We are not checking for errors using
* i40e_test_staterr with
@@ -371,7 +381,9 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
xdp_res = i40e_run_xdp_zc(rx_ring, bi);
i40e_handle_xdp_result_zc(rx_ring, bi, rx_desc, &rx_packets,
- &rx_bytes, size, xdp_res);
+ &rx_bytes, size, xdp_res, &failure);
+ if (failure)
+ break;
total_rx_packets += rx_packets;
total_rx_bytes += rx_bytes;
xdp_xmit |= xdp_res & (I40E_XDP_TX | I40E_XDP_REDIR);
@@ -382,7 +394,7 @@ int i40e_clean_rx_irq_zc(struct i40e_ring *rx_ring, int budget)
cleaned_count = (next_to_clean - rx_ring->next_to_use - 1) & count_mask;
if (cleaned_count >= I40E_RX_BUFFER_WRITE)
- failure = !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);
+ failure |= !i40e_alloc_rx_buffers_zc(rx_ring, cleaned_count);
i40e_finalize_xdp_rx(rx_ring, xdp_xmit);
i40e_update_rx_stats(rx_ring, total_rx_bytes, total_rx_packets);
When XSK pool uses need_wakeup feature, correlate -ENOBUFS that was returned from xdp_do_redirect() with a XSK Rx queue being full. In such case, terminate the Rx processing that is being done on the current HW Rx ring and let the user space consume descriptors from XSK Rx queue so that there is room that driver can use later on. Introduce new internal return code I40E_XDP_EXIT that will indicate case described above. Note that it does not affect Tx processing that is bound to the same NAPI context, nor the other Rx rings. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> --- .../ethernet/intel/i40e/i40e_txrx_common.h | 1 + drivers/net/ethernet/intel/i40e/i40e_xsk.c | 32 +++++++++++++------ 2 files changed, 23 insertions(+), 10 deletions(-)