octeontx2-pf: Do xdp_do_flush() after redirects.

[ Upstream commit 70b2b6892645e58ed6f051dad7f8d1083f0ad553 ]

xdp_do_flush() should be invoked before leaving the NAPI poll function
if XDP-redirect has been performed.

Invoke xdp_do_flush() before leaving NAPI.

Cc: Geetha sowjanya <gakula@marvell.com>
Cc: Subbaraya Sundeep <sbhatta@marvell.com>
Cc: Sunil Goutham <sgoutham@marvell.com>
Cc: hariprasad <hkelam@marvell.com>
Fixes: 06059a1a9a4a5 ("octeontx2-pf: Add XDP support to netdev PF")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Geethasowjanya Akula <gakula@marvell.com>
Acked-by: Jesper Dangaard Brouer <hawk@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
index 7af223b..5704fb7 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.c
@@ -29,7 +29,8 @@
 static bool otx2_xdp_rcv_pkt_handler(struct otx2_nic *pfvf,
                                     struct bpf_prog *prog,
                                     struct nix_cqe_rx_s *cqe,
-                                    struct otx2_cq_queue *cq);
+                                    struct otx2_cq_queue *cq,
+                                    bool *need_xdp_flush);
 
 static int otx2_nix_cq_op_status(struct otx2_nic *pfvf,
                                 struct otx2_cq_queue *cq)
@@ -340,7 +341,7 @@ static bool otx2_check_rcv_errors(struct otx2_nic *pfvf,
 static void otx2_rcv_pkt_handler(struct otx2_nic *pfvf,
                                 struct napi_struct *napi,
                                 struct otx2_cq_queue *cq,
-                                struct nix_cqe_rx_s *cqe)
+                                struct nix_cqe_rx_s *cqe, bool *need_xdp_flush)
 {
        struct nix_rx_parse_s *parse = &cqe->parse;
        struct nix_rx_sg_s *sg = &cqe->sg;
@@ -356,7 +357,7 @@ static void otx2_rcv_pkt_handler(struct otx2_nic *pfvf,
        }
 
        if (pfvf->xdp_prog)
-               if (otx2_xdp_rcv_pkt_handler(pfvf, pfvf->xdp_prog, cqe, cq))
+               if (otx2_xdp_rcv_pkt_handler(pfvf, pfvf->xdp_prog, cqe, cq, need_xdp_flush))
                        return;
 
        skb = napi_get_frags(napi);
@@ -389,6 +390,7 @@ static int otx2_rx_napi_handler(struct otx2_nic *pfvf,
                                struct napi_struct *napi,
                                struct otx2_cq_queue *cq, int budget)
 {
+       bool need_xdp_flush = false;
        struct nix_cqe_rx_s *cqe;
        int processed_cqe = 0;
 
@@ -410,13 +412,15 @@ process_cqe:
                cq->cq_head++;
                cq->cq_head &= (cq->cqe_cnt - 1);
 
-               otx2_rcv_pkt_handler(pfvf, napi, cq, cqe);
+               otx2_rcv_pkt_handler(pfvf, napi, cq, cqe, &need_xdp_flush);
 
                cqe->hdr.cqe_type = NIX_XQE_TYPE_INVALID;
                cqe->sg.seg_addr = 0x00;
                processed_cqe++;
                cq->pend_cqe--;
        }
+       if (need_xdp_flush)
+               xdp_do_flush();
 
        /* Free CQEs to HW */
        otx2_write64(pfvf, NIX_LF_CQ_OP_DOOR,
@@ -1323,7 +1327,8 @@ bool otx2_xdp_sq_append_pkt(struct otx2_nic *pfvf, u64 iova, int len, u16 qidx)
 static bool otx2_xdp_rcv_pkt_handler(struct otx2_nic *pfvf,
                                     struct bpf_prog *prog,
                                     struct nix_cqe_rx_s *cqe,
-                                    struct otx2_cq_queue *cq)
+                                    struct otx2_cq_queue *cq,
+                                    bool *need_xdp_flush)
 {
        unsigned char *hard_start, *data;
        int qidx = cq->cq_idx;
@@ -1360,8 +1365,10 @@ static bool otx2_xdp_rcv_pkt_handler(struct otx2_nic *pfvf,
 
                otx2_dma_unmap_page(pfvf, iova, pfvf->rbsize,
                                    DMA_FROM_DEVICE);
-               if (!err)
+               if (!err) {
+                       *need_xdp_flush = true;
                        return true;
+               }
                put_page(page);
                break;
        default: