From 466e88548e19914e5d0b0d8406f95f47d9232753 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Mon, 18 Sep 2023 17:36:10 +0200 Subject: [PATCH] bnxt_en: Flush XDP for bnxt_poll_nitroa0()'s NAPI [ Upstream commit edc0140cc3b7b91874ebe70eb7d2a851e8817ccc ] bnxt_poll_nitroa0() invokes bnxt_rx_pkt() which can run a XDP program which in turn can return XDP_REDIRECT. bnxt_rx_pkt() is also used by __bnxt_poll_work() which flushes (xdp_do_flush()) the packets after each round. bnxt_poll_nitroa0() lacks this feature. xdp_do_flush() should be invoked before leaving the NAPI callback. Invoke xdp_do_flush() after a redirect in bnxt_poll_nitroa0() NAPI. Cc: Michael Chan Fixes: f18c2b77b2e4e ("bnxt_en: optimized XDP_REDIRECT support") Reviewed-by: Andy Gospodarek Signed-off-by: Sebastian Andrzej Siewior Reviewed-by: Michael Chan Acked-by: Jesper Dangaard Brouer Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- drivers/net/ethernet/broadcom/bnxt/bnxt.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index d8366351cf14..c67a108c2c07 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -2404,6 +2404,7 @@ static int bnxt_poll_nitroa0(struct napi_struct *napi, int budget) struct rx_cmp_ext *rxcmp1; u32 cp_cons, tmp_raw_cons; u32 raw_cons = cpr->cp_raw_cons; + bool flush_xdp = false; u32 rx_pkts = 0; u8 event = 0; @@ -2438,6 +2439,8 @@ static int bnxt_poll_nitroa0(struct napi_struct *napi, int budget) rx_pkts++; else if (rc == -EBUSY) /* partial completion */ break; + if (event & BNXT_REDIRECT_EVENT) + flush_xdp = true; } else if (unlikely(TX_CMP_TYPE(txcmp) == CMPL_BASE_TYPE_HWRM_DONE)) { bnxt_hwrm_handler(bp, txcmp); @@ -2457,6 +2460,8 @@ static int bnxt_poll_nitroa0(struct napi_struct *napi, int budget) if (event & BNXT_AGG_EVENT) bnxt_db_write(bp, &rxr->rx_agg_db, rxr->rx_agg_prod); + if (flush_xdp) + xdp_do_flush(); if (!bnxt_has_work(bp, cpr) && rx_pkts < budget) { napi_complete_done(napi, rx_pkts);