From: Andy Gospodarek <gospo@broadcom.com>
Date: Fri, 8 Apr 2022 03:59:06 -0400
Subject: bnxt: XDP multibuffer enablement
Patch-mainline: v5.19-rc1
Git-commit: 9f4b28301ce6a594a692a0abc2002d0bb912f2b7
References: jsc#PED-1495

Allow aggregation buffers to be in place in the receive path and
allow XDP programs to be attached when using a larger than 4k MTU.

v3: Add a check to sure XDP program supports multipage packets.

Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     |    3 +--
 drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c |    5 +++--
 2 files changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1939,8 +1939,7 @@ static int bnxt_rx_pkt(struct bnxt *bp,
 		xdp_active = true;
 	}
 
-	/* skip running XDP prog if there are aggregation bufs */
-	if (!agg_bufs && xdp_active) {
+	if (xdp_active) {
 		if (bnxt_rx_xdp(bp, rxr, cons, xdp, data, &len, event)) {
 			rc = 1;
 			goto next_rx;
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -387,8 +387,9 @@ static int bnxt_xdp_set(struct bnxt *bp,
 	int tx_xdp = 0, rc, tc;
 	struct bpf_prog *old;
 
-	if (prog && bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) {
-		netdev_warn(dev, "MTU %d larger than largest XDP supported MTU %d.\n",
+	if (prog && !prog->aux->xdp_has_frags &&
+	    bp->dev->mtu > BNXT_MAX_PAGE_MODE_MTU) {
+		netdev_warn(dev, "MTU %d larger than %d without XDP frag support.\n",
 			    bp->dev->mtu, BNXT_MAX_PAGE_MODE_MTU);
 		return -EOPNOTSUPP;
 	}