nfp: setup xdp_rxq_info

Driver hook points for xdp_rxq_info:
 * reg  : nfp_net_rx_ring_alloc
 * unreg: nfp_net_rx_ring_free

In struct nfp_net_rx_ring moved member @size into a hole on 64-bit.
Thus, the size remaines the same after adding member @xdp_rxq.

Cc: oss-drivers@netronome.com
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

2 files changed, 12 insertions, 3 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net.h b/drivers/net/ethernet/netronome/nfp/nfp_net.h
index 3801c52098d5..0e564cfabe7e 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net.h
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net.h
@@ -47,6 +47,7 @@
 #include <linux/netdevice.h>
 #include <linux/pci.h>
 #include <linux/io-64-nonatomic-hi-lo.h>
+#include <net/xdp.h>
 
 #include "nfp_net_ctrl.h"
 
@@ -350,6 +351,7 @@ struct nfp_net_rx_buf {
  * @rxds:       Virtual address of FL/RX ring in host memory
  * @dma:        DMA address of the FL/RX ring
  * @size:       Size, in bytes, of the FL/RX ring (needed to free)
+ * @xdp_rxq:    RX-ring info avail for XDP
  */
 struct nfp_net_rx_ring {
         struct nfp_net_r_vector *r_vec;
@@ -361,13 +363,14 @@ struct nfp_net_rx_ring {
         u32 idx;
 
         int fl_qcidx;
+        unsigned int size;
         u8 __iomem *qcp_fl;
 
         struct nfp_net_rx_buf *rxbufs;
         struct nfp_net_rx_desc *rxds;
 
         dma_addr_t dma;
-        unsigned int size;
+        struct xdp_rxq_info xdp_rxq;
 } ____cacheline_aligned;
 
 /**
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 0add4870ce2e..45b8cae937be 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -1608,11 +1608,13 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
         unsigned int true_bufsz;
         struct sk_buff *skb;
         int pkts_polled = 0;
+        struct xdp_buff xdp;
         int idx;
 
         rcu_read_lock();
         xdp_prog = READ_ONCE(dp->xdp_prog);
         true_bufsz = xdp_prog ? PAGE_SIZE : dp->fl_bufsz;
+        xdp.rxq = &rx_ring->xdp_rxq;
         tx_ring = r_vec->xdp_ring;
 
         while (pkts_polled < budget) {
@@ -1703,7 +1705,6 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
                                   dp->bpf_offload_xdp) && !meta.portid) {
                         void *orig_data = rxbuf->frag + pkt_off;
                         unsigned int dma_off;
-                        struct xdp_buff xdp;
                         int act;
 
                         xdp.data_hard_start = rxbuf->frag + NFP_NET_RX_BUF_HEADROOM;
@@ -2252,6 +2253,7 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
         struct nfp_net_r_vector *r_vec = rx_ring->r_vec;
         struct nfp_net_dp *dp = &r_vec->nfp_net->dp;
 
+        xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
         kfree(rx_ring->rxbufs);
 
         if (rx_ring->rxds)
@@ -2275,7 +2277,11 @@ static void nfp_net_rx_ring_free(struct nfp_net_rx_ring *rx_ring)
 static int
 nfp_net_rx_ring_alloc(struct nfp_net_dp *dp, struct nfp_net_rx_ring *rx_ring)
 {
-        int sz;
+        int sz, err;
+
+        err = xdp_rxq_info_reg(&rx_ring->xdp_rxq, dp->netdev, rx_ring->idx);
+        if (err < 0)
+                return err;
 
         rx_ring->cnt = dp->rxd_cnt;
         rx_ring->size = sizeof(*rx_ring->rxds) * rx_ring->cnt;