net: fec: move xdp_rxq_info* APIs out of fec_enet_create_page_pool()

Extract fec_xdp_rxq_info_reg() from fec_enet_create_page_pool() and move
it out of fec_enet_create_page_pool(), so that it can be reused in the
subsequent patches to support XDP zero copy mode.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20260205085742.2685134-13-wei.fang@nxp.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: WeiFang-NXP

drivers/net/ethernet/freescale/fec_main.c

@@ -489,23 +489,7 @@ fec_enet_create_page_pool(struct fec_enet_private *fep,
 		return err;
 	}
 
-	err = xdp_rxq_info_reg(&rxq->xdp_rxq, fep->netdev, rxq->id, 0);
-	if (err < 0)
-		goto err_free_pp;
-
-	err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL,
-					 rxq->page_pool);
-	if (err)
-		goto err_unregister_rxq;
-
 	return 0;
-
-err_unregister_rxq:
-	xdp_rxq_info_unreg(&rxq->xdp_rxq);
-err_free_pp:
-	page_pool_destroy(rxq->page_pool);
-	rxq->page_pool = NULL;
-	return err;
 }
 
 static void fec_txq_trigger_xmit(struct fec_enet_private *fep,
@@ -3420,6 +3404,38 @@ static const struct ethtool_ops fec_enet_ethtool_ops = {
 	.self_test		= net_selftest,
 };
 
+static int fec_xdp_rxq_info_reg(struct fec_enet_private *fep,
+				struct fec_enet_priv_rx_q *rxq)
+{
+	struct net_device *ndev = fep->netdev;
+	int err;
+
+	err = xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq->id, 0);
+	if (err) {
+		netdev_err(ndev, "Failed to register xdp rxq info\n");
+		return err;
+	}
+
+	err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL,
+					 rxq->page_pool);
+	if (err) {
+		netdev_err(ndev, "Failed to register XDP mem model\n");
+		xdp_rxq_info_unreg(&rxq->xdp_rxq);
+
+		return err;
+	}
+
+	return 0;
+}
+
+static void fec_xdp_rxq_info_unreg(struct fec_enet_priv_rx_q *rxq)
+{
+	if (xdp_rxq_info_is_reg(&rxq->xdp_rxq)) {
+		xdp_rxq_info_unreg_mem_model(&rxq->xdp_rxq);
+		xdp_rxq_info_unreg(&rxq->xdp_rxq);
+	}
+}
+
 static void fec_enet_free_buffers(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -3431,15 +3447,16 @@ static void fec_enet_free_buffers(struct net_device *ndev)
 
 	for (q = 0; q < fep->num_rx_queues; q++) {
 		rxq = fep->rx_queue[q];
+
+		fec_xdp_rxq_info_unreg(rxq);
+
 		for (i = 0; i < rxq->bd.ring_size; i++)
 			page_pool_put_full_page(rxq->page_pool, rxq->rx_buf[i],
 						false);
 
 		for (i = 0; i < XDP_STATS_TOTAL; i++)
 			rxq->stats[i] = 0;
 
-		if (xdp_rxq_info_is_reg(&rxq->xdp_rxq))
-			xdp_rxq_info_unreg(&rxq->xdp_rxq);
 		page_pool_destroy(rxq->page_pool);
 		rxq->page_pool = NULL;
 	}
@@ -3594,6 +3611,11 @@ fec_enet_alloc_rxq_buffers(struct net_device *ndev, unsigned int queue)
 	/* Set the last buffer to wrap. */
 	bdp = fec_enet_get_prevdesc(bdp, &rxq->bd);
 	bdp->cbd_sc |= cpu_to_fec16(BD_ENET_RX_WRAP);
+
+	err = fec_xdp_rxq_info_reg(fep, rxq);
+	if (err)
+		goto err_alloc;
+
 	return 0;
 
  err_alloc: