netdev - [PATCH net-next v4 02/11] bnxt: add flag to denote that an xdp program is currently attached

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Message-Id: <1649404746-31033-3-git-send-email-michael.chan@broadcom.com>
Date:   Fri,  8 Apr 2022 03:58:57 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org, gospo@...adcom.com,
        bpf@...r.kernel.org, john.fastabend@...il.com, toke@...hat.com,
        lorenzo@...nel.org, ast@...nel.org, daniel@...earbox.net,
        echaudro@...hat.com, pabeni@...hat.com
Subject: [PATCH net-next v4 02/11] bnxt: add flag to denote that an xdp program is currently attached

From: Andy Gospodarek <gospo@...adcom.com>

This will be used to determine if bnxt_rx_xdp should be called
rather than calling it every time.

Signed-off-by: Andy Gospodarek <gospo@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 826d94c49d26..f6973f57ccd2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1729,6 +1729,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	struct bnxt_sw_rx_bd *rx_buf;
 	unsigned int len;
 	u8 *data_ptr, agg_bufs, cmp_type;
+	bool xdp_active = false;
 	dma_addr_t dma_addr;
 	struct sk_buff *skb;
 	struct xdp_buff xdp;
@@ -1842,11 +1843,17 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 
 	if (bnxt_xdp_attached(bp, rxr)) {
 		bnxt_xdp_buff_init(bp, rxr, cons, &data_ptr, &len, &xdp);
+		xdp_active = true;
+	}
+
+	/* skip running XDP prog if there are aggregation bufs */
+	if (!agg_bufs && xdp_active) {
 		if (bnxt_rx_xdp(bp, rxr, cons, xdp, data, &len, event)) {
 			rc = 1;
 			goto next_rx;
 		}
 	}
+
 	if (len <= bp->rx_copy_thresh) {
 		skb = bnxt_copy_skb(bnapi, data_ptr, len, dma_addr);
 		bnxt_reuse_rx_data(rxr, cons, data);
-- 
2.18.1


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