Commit 9f4b2830 authored Apr 08, 2022 by Andy Gospodarek Committed by David S. Miller Apr 08, 2022

bnxt: XDP multibuffer enablement



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>

parent a7559bc8

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -1939,8 +1939,7 @@ static int bnxt_rx_pkt(struct bnxt bp, struct bnxt_cp_ring_info cpr,
		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;

drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -387,8 +387,9 @@ static int bnxt_xdp_set(struct bnxt bp, struct bpf_prog prog)
		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;
		}