1 files changed, 34 insertions, 202 deletions

diff --git a/drivers/net/ethernet/mscc/ocelot_vsc7514.c b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
index 30a38df08a21..4bd7e9d9ec61 100644
--- a/drivers/net/ethernet/mscc/ocelot_vsc7514.c
+++ b/drivers/net/ethernet/mscc/ocelot_vsc7514.c
@@ -4,6 +4,7 @@
  *
  * Copyright (c) 2017 Microsemi Corporation
  */
+#include <linux/dsa/ocelot.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of_net.h>
@@ -18,8 +19,6 @@
 #include <soc/mscc/ocelot_hsio.h>
 #include "ocelot.h"
 
-#define IFH_EXTRACT_BITFIELD64(x, o, w) (((x) >> (o)) & GENMASK_ULL((w) - 1, 0))
-
 static const u32 ocelot_ana_regmap[] = {
 	REG(ANA_ADVLEARN,				0x009000),
 	REG(ANA_VLANMASK,				0x009004),
@@ -532,181 +531,28 @@ static int ocelot_chip_init(struct ocelot *ocelot, const struct ocelot_ops *ops)
 	return 0;
 }
 
-static int ocelot_parse_ifh(u32 *_ifh, struct frame_info *info)
-{
-	u8 llen, wlen;
-	u64 ifh[2];
-
-	ifh[0] = be64_to_cpu(((__force __be64 *)_ifh)[0]);
-	ifh[1] = be64_to_cpu(((__force __be64 *)_ifh)[1]);
-
-	wlen = IFH_EXTRACT_BITFIELD64(ifh[0], 7,  8);
-	llen = IFH_EXTRACT_BITFIELD64(ifh[0], 15,  6);
-
-	info->len = OCELOT_BUFFER_CELL_SZ * wlen + llen - 80;
-
-	info->timestamp = IFH_EXTRACT_BITFIELD64(ifh[0], 21, 32);
-
-	info->port = IFH_EXTRACT_BITFIELD64(ifh[1], 43, 4);
-
-	info->tag_type = IFH_EXTRACT_BITFIELD64(ifh[1], 16,  1);
-	info->vid = IFH_EXTRACT_BITFIELD64(ifh[1], 0,  12);
-
-	return 0;
-}
-
-static int ocelot_rx_frame_word(struct ocelot *ocelot, u8 grp, bool ifh,
-				u32 *rval)
-{
-	u32 val;
-	u32 bytes_valid;
-
-	val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
-	if (val == XTR_NOT_READY) {
-		if (ifh)
-			return -EIO;
-
-		do {
-			val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
-		} while (val == XTR_NOT_READY);
-	}
-
-	switch (val) {
-	case XTR_ABORT:
-		return -EIO;
-	case XTR_EOF_0:
-	case XTR_EOF_1:
-	case XTR_EOF_2:
-	case XTR_EOF_3:
-	case XTR_PRUNED:
-		bytes_valid = XTR_VALID_BYTES(val);
-		val = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
-		if (val == XTR_ESCAPE)
-			*rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
-		else
-			*rval = val;
-
-		return bytes_valid;
-	case XTR_ESCAPE:
-		*rval = ocelot_read_rix(ocelot, QS_XTR_RD, grp);
-
-		return 4;
-	default:
-		*rval = val;
-
-		return 4;
-	}
-}
-
 static irqreturn_t ocelot_xtr_irq_handler(int irq, void *arg)
 {
 	struct ocelot *ocelot = arg;
-	int i = 0, grp = 0;
-	int err = 0;
-
-	if (!(ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp)))
-		return IRQ_NONE;
+	int grp = 0, err;
 
-	do {
-		struct skb_shared_hwtstamps *shhwtstamps;
-		struct ocelot_port_private *priv;
-		struct ocelot_port *ocelot_port;
-		u64 tod_in_ns, full_ts_in_ns;
-		struct frame_info info = {};
-		struct net_device *dev;
-		u32 ifh[4], val, *buf;
-		struct timespec64 ts;
-		int sz, len, buf_len;
+	while (ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp)) {
 		struct sk_buff *skb;
 
-		for (i = 0; i < OCELOT_TAG_LEN / 4; i++) {
-			err = ocelot_rx_frame_word(ocelot, grp, true, &ifh[i]);
-			if (err != 4)
-				break;
-		}
-
-		if (err != 4)
-			break;
-
-		/* At this point the IFH was read correctly, so it is safe to
-		 * presume that there is no error. The err needs to be reset
-		 * otherwise a frame could come in CPU queue between the while
-		 * condition and the check for error later on. And in that case
-		 * the new frame is just removed and not processed.
-		 */
-		err = 0;
-
-		ocelot_parse_ifh(ifh, &info);
-
-		ocelot_port = ocelot->ports[info.port];
-		priv = container_of(ocelot_port, struct ocelot_port_private,
-				    port);
-		dev = priv->dev;
-
-		skb = netdev_alloc_skb(dev, info.len);
-
-		if (unlikely(!skb)) {
-			netdev_err(dev, "Unable to allocate sk_buff\n");
-			err = -ENOMEM;
-			break;
-		}
-		buf_len = info.len - ETH_FCS_LEN;
-		buf = (u32 *)skb_put(skb, buf_len);
-
-		len = 0;
-		do {
-			sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
-			*buf++ = val;
-			len += sz;
-		} while (len < buf_len);
-
-		/* Read the FCS */
-		sz = ocelot_rx_frame_word(ocelot, grp, false, &val);
-		/* Update the statistics if part of the FCS was read before */
-		len -= ETH_FCS_LEN - sz;
-
-		if (unlikely(dev->features & NETIF_F_RXFCS)) {
-			buf = (u32 *)skb_put(skb, ETH_FCS_LEN);
-			*buf = val;
-		}
-
-		if (sz < 0) {
-			err = sz;
-			break;
-		}
-
-		if (ocelot->ptp) {
-			ocelot_ptp_gettime64(&ocelot->ptp_info, &ts);
-
-			tod_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec);
-			if ((tod_in_ns & 0xffffffff) < info.timestamp)
-				full_ts_in_ns = (((tod_in_ns >> 32) - 1) << 32) |
-						info.timestamp;
-			else
-				full_ts_in_ns = (tod_in_ns & GENMASK_ULL(63, 32)) |
-						info.timestamp;
-
-			shhwtstamps = skb_hwtstamps(skb);
-			memset(shhwtstamps, 0, sizeof(struct skb_shared_hwtstamps));
-			shhwtstamps->hwtstamp = full_ts_in_ns;
-		}
+		err = ocelot_xtr_poll_frame(ocelot, grp, &skb);
+		if (err)
+			goto out;
 
-		/* Everything we see on an interface that is in the HW bridge
-		 * has already been forwarded.
-		 */
-		if (ocelot->bridge_mask & BIT(info.port))
-			skb->offload_fwd_mark = 1;
+		skb->dev->stats.rx_bytes += skb->len;
+		skb->dev->stats.rx_packets++;
 
-		skb->protocol = eth_type_trans(skb, dev);
 		if (!skb_defer_rx_timestamp(skb))
 			netif_rx(skb);
-		dev->stats.rx_bytes += len;
-		dev->stats.rx_packets++;
-	} while (ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp));
+	}
 
-	if (err)
-		while (ocelot_read(ocelot, QS_XTR_DATA_PRESENT) & BIT(grp))
-			ocelot_read_rix(ocelot, QS_XTR_RD, grp);
+out:
+	if (err < 0)
+		ocelot_drain_cpu_queue(ocelot, 0);
 
 	return IRQ_HANDLED;
 }
@@ -1064,7 +910,6 @@ static void mscc_ocelot_release_ports(struct ocelot *ocelot)
 	int port;
 
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
-		struct ocelot_port_private *priv;
 		struct ocelot_port *ocelot_port;
 
 		ocelot_port = ocelot->ports[port];
@@ -1072,12 +917,7 @@ static void mscc_ocelot_release_ports(struct ocelot *ocelot)
 			continue;
 
 		ocelot_deinit_port(ocelot, port);
-
-		priv = container_of(ocelot_port, struct ocelot_port_private,
-				    port);
-
-		unregister_netdev(priv->dev);
-		free_netdev(priv->dev);
+		ocelot_release_port(ocelot_port);
 	}
 }
 
@@ -1085,8 +925,8 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 				  struct device_node *ports)
 {
 	struct ocelot *ocelot = platform_get_drvdata(pdev);
+	u32 devlink_ports_registered = 0;
 	struct device_node *portnp;
-	bool *registered_ports;
 	int port, err;
 	u32 reg;
 
@@ -1102,11 +942,6 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 	if (!ocelot->devlink_ports)
 		return -ENOMEM;
 
-	registered_ports = kcalloc(ocelot->num_phys_ports, sizeof(bool),
-				   GFP_KERNEL);
-	if (!registered_ports)
-		return -ENOMEM;
-
 	for_each_available_child_of_node(ports, portnp) {
 		struct ocelot_port_private *priv;
 		struct ocelot_port *ocelot_port;
@@ -1123,14 +958,22 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 			continue;
 
 		port = reg;
+		if (port < 0 || port >= ocelot->num_phys_ports) {
+			dev_err(ocelot->dev,
+				"invalid port number: %d >= %d\n", port,
+				ocelot->num_phys_ports);
+			continue;
+		}
 
 		snprintf(res_name, sizeof(res_name), "port%d", port);
 
 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 						   res_name);
 		target = ocelot_regmap_init(ocelot, res);
-		if (IS_ERR(target))
-			continue;
+		if (IS_ERR(target)) {
+			err = PTR_ERR(target);
+			goto out_teardown;
+		}
 
 		phy_node = of_parse_phandle(portnp, "phy-handle", 0);
 		if (!phy_node)
@@ -1147,6 +990,7 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 			of_node_put(portnp);
 			goto out_teardown;
 		}
+		devlink_ports_registered |= BIT(port);
 
 		err = ocelot_probe_port(ocelot, port, target, phy);
 		if (err) {
@@ -1154,8 +998,6 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 			goto out_teardown;
 		}
 
-		registered_ports[port] = true;
-
 		ocelot_port = ocelot->ports[port];
 		priv = container_of(ocelot_port, struct ocelot_port_private,
 				    port);
@@ -1208,23 +1050,16 @@ static int mscc_ocelot_init_ports(struct platform_device *pdev,
 
 	/* Initialize unused devlink ports at the end */
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
-		if (registered_ports[port])
+		if (devlink_ports_registered & BIT(port))
 			continue;
 
 		err = ocelot_port_devlink_init(ocelot, port,
 					       DEVLINK_PORT_FLAVOUR_UNUSED);
-		if (err) {
-			while (port-- >= 0) {
-				if (!registered_ports[port])
-					continue;
-				ocelot_port_devlink_teardown(ocelot, port);
-			}
-
+		if (err)
 			goto out_teardown;
-		}
-	}
 
-	kfree(registered_ports);
+		devlink_ports_registered |= BIT(port);
+	}
 
 	return 0;
 
@@ -1233,12 +1068,9 @@ out_teardown:
 	mscc_ocelot_release_ports(ocelot);
 	/* Tear down devlink ports for the registered network interfaces */
 	for (port = 0; port < ocelot->num_phys_ports; port++) {
-		if (!registered_ports[port])
-			continue;
-
-		ocelot_port_devlink_teardown(ocelot, port);
+		if (devlink_ports_registered & BIT(port))
+			ocelot_port_devlink_teardown(ocelot, port);
 	}
-	kfree(registered_ports);
 	return err;
 }
 
@@ -1314,8 +1146,10 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 		goto out_free_devlink;
 
 	irq_xtr = platform_get_irq_byname(pdev, "xtr");
-	if (irq_xtr < 0)
+	if (irq_xtr < 0) {
+		err = irq_xtr;
 		goto out_free_devlink;
+	}
 
 	err = devm_request_threaded_irq(&pdev->dev, irq_xtr, NULL,
 					ocelot_xtr_irq_handler, IRQF_ONESHOT,
@@ -1347,8 +1181,6 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 	ocelot->num_flooding_pgids = 1;
 
 	ocelot->vcap = vsc7514_vcap_props;
-	ocelot->inj_prefix = OCELOT_TAG_PREFIX_NONE;
-	ocelot->xtr_prefix = OCELOT_TAG_PREFIX_NONE;
 	ocelot->npi = -1;
 
 	err = ocelot_init(ocelot);