net: mscc: ocelot: convert to use ocelot_port_add_txtstamp_skb()

Convert to use ocelot_port_add_txtstamp_skb() for adding skbs which
require TX timestamp into list. Export it so that DSA Felix driver
could reuse it too.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index a58d2ed..0e96ffa 100644 (file)
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -575,6 +575,32 @@ static int ocelot_gen_ifh(u32 *ifh, struct frame_info *info)
        return 0;
 }
 
+int ocelot_port_add_txtstamp_skb(struct ocelot_port *ocelot_port,
+                                struct sk_buff *skb)
+{
+       struct skb_shared_info *shinfo = skb_shinfo(skb);
+       struct ocelot *ocelot = ocelot_port->ocelot;
+
+       if (ocelot->ptp && shinfo->tx_flags & SKBTX_HW_TSTAMP &&
+           ocelot_port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) {
+               struct ocelot_skb *oskb =
+                       kzalloc(sizeof(struct ocelot_skb), GFP_ATOMIC);
+
+               if (unlikely(!oskb))
+                       return -ENOMEM;
+
+               shinfo->tx_flags |= SKBTX_IN_PROGRESS;
+
+               oskb->skb = skb;
+               oskb->id = ocelot_port->ts_id % 4;
+
+               list_add_tail(&oskb->head, &ocelot_port->skbs);
+               return 0;
+       }
+       return -ENODATA;
+}
+EXPORT_SYMBOL(ocelot_port_add_txtstamp_skb);
+
 static int ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
 {
        struct ocelot_port_private *priv = netdev_priv(dev);
@@ -637,26 +663,11 @@ static int ocelot_port_xmit(struct sk_buff *skb, struct net_device *dev)
        dev->stats.tx_packets++;
        dev->stats.tx_bytes += skb->len;
 
-       if (ocelot->ptp && shinfo->tx_flags & SKBTX_HW_TSTAMP &&
-           ocelot_port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) {
-               struct ocelot_skb *oskb =
-                       kzalloc(sizeof(struct ocelot_skb), GFP_ATOMIC);
-
-               if (unlikely(!oskb))
-                       goto out;
-
-               skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
-
-               oskb->skb = skb;
-               oskb->id = ocelot_port->ts_id % 4;
+       if (!ocelot_port_add_txtstamp_skb(ocelot_port, skb)) {
                ocelot_port->ts_id++;
-
-               list_add_tail(&oskb->head, &ocelot_port->skbs);
-
                return NETDEV_TX_OK;
        }
 
-out:
        dev_kfree_skb_any(skb);
        return NETDEV_TX_OK;
 }

diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 1a5cb1b..e1108a5 100644 (file)
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -543,6 +543,8 @@ int ocelot_vlan_del(struct ocelot *ocelot, int port, u16 vid);
 int ocelot_hwstamp_get(struct ocelot *ocelot, int port, struct ifreq *ifr);
 int ocelot_hwstamp_set(struct ocelot *ocelot, int port, struct ifreq *ifr);
 int ocelot_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts);
+int ocelot_port_add_txtstamp_skb(struct ocelot_port *ocelot_port,
+                                struct sk_buff *skb);
 void ocelot_get_txtstamp(struct ocelot *ocelot);
 
 #endif