octeontx2-pf: Dont enable backpressure on LBK links

[ Upstream commit 4c85e57 ]

Avoid configure backpressure for LBK links as they
don't support it and enable lmacs before configuration
pause frames.

Fixes: 75f3627 ("octeontx2-pf: Support to enable/disable pause frames via ethtool")
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/ethernet/marvell/octeontx2/af/cgx.c

@@ -1243,8 +1243,8 @@ static int cgx_lmac_init(struct cgx *cgx)
 
 		/* Add reference */
 		cgx->lmac_idmap[lmac->lmac_id] = lmac;
-		cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, true);
 		set_bit(lmac->lmac_id, &cgx->lmac_bmap);
+		cgx->mac_ops->mac_pause_frm_config(cgx, lmac->lmac_id, true);
 	}
 
 	return cgx_lmac_verify_fwi_version(cgx);

drivers/net/ethernet/marvell/octeontx2/nic/otx2_common.c

@@ -921,12 +921,14 @@ static int otx2_cq_init(struct otx2_nic *pfvf, u16 qidx)
 		aq->cq.drop = RQ_DROP_LVL_CQ(pfvf->hw.rq_skid, cq->cqe_cnt);
 		aq->cq.drop_ena = 1;
 
-		/* Enable receive CQ backpressure */
-		aq->cq.bp_ena = 1;
-		aq->cq.bpid = pfvf->bpid[0];
+		if (!is_otx2_lbkvf(pfvf->pdev)) {
+			/* Enable receive CQ backpressure */
+			aq->cq.bp_ena = 1;
+			aq->cq.bpid = pfvf->bpid[0];
 
-		/* Set backpressure level is same as cq pass level */
-		aq->cq.bp = RQ_PASS_LVL_CQ(pfvf->hw.rq_skid, qset->rqe_cnt);
+			/* Set backpressure level is same as cq pass level */
+			aq->cq.bp = RQ_PASS_LVL_CQ(pfvf->hw.rq_skid, qset->rqe_cnt);
+		}
 	}
 
 	/* Fill AQ info */
@@ -1183,7 +1185,7 @@ static int otx2_aura_init(struct otx2_nic *pfvf, int aura_id,
 	aq->aura.fc_hyst_bits = 0; /* Store count on all updates */
 
 	/* Enable backpressure for RQ aura */
-	if (aura_id < pfvf->hw.rqpool_cnt) {
+	if (aura_id < pfvf->hw.rqpool_cnt && !is_otx2_lbkvf(pfvf->pdev)) {
 		aq->aura.bp_ena = 0;
 		aq->aura.nix0_bpid = pfvf->bpid[0];
 		/* Set backpressure level for RQ's Aura */