Merge remote-tracking branch 'torvalds/master' into perf/core

To get closer to upstream and check if we need to sync more UAPI
headers, pick up fixes for libbpf that prevent perf's container tests
from completing successfuly, etc.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

5 files changed, 86 insertions, 117 deletions

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 6b17cd961d06..d0a97eb73a37 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -27,7 +27,6 @@
 #include <linux/platform_data/mv88e6xxx.h>
 #include <linux/netdevice.h>
 #include <linux/gpio/consumer.h>
-#include <linux/phy.h>
 #include <linux/phylink.h>
 #include <net/dsa.h>
 
@@ -430,7 +429,7 @@ int mv88e6xxx_port_setup_mac(struct mv88e6xxx_chip *chip, int port, int link,
 		return 0;
 
 	/* Port's MAC control must not be changed unless the link is down */
-	err = chip->info->ops->port_set_link(chip, port, 0);
+	err = chip->info->ops->port_set_link(chip, port, LINK_FORCED_DOWN);
 	if (err)
 		return err;
 
@@ -482,30 +481,6 @@ static int mv88e6xxx_phy_is_internal(struct dsa_switch *ds, int port)
 	return port < chip->info->num_internal_phys;
 }
 
-/* We expect the switch to perform auto negotiation if there is a real
- * phy. However, in the case of a fixed link phy, we force the port
- * settings from the fixed link settings.
- */
-static void mv88e6xxx_adjust_link(struct dsa_switch *ds, int port,
-				  struct phy_device *phydev)
-{
-	struct mv88e6xxx_chip *chip = ds->priv;
-	int err;
-
-	if (!phy_is_pseudo_fixed_link(phydev) &&
-	    mv88e6xxx_phy_is_internal(ds, port))
-		return;
-
-	mv88e6xxx_reg_lock(chip);
-	err = mv88e6xxx_port_setup_mac(chip, port, phydev->link, phydev->speed,
-				       phydev->duplex, phydev->pause,
-				       phydev->interface);
-	mv88e6xxx_reg_unlock(chip);
-
-	if (err && err != -EOPNOTSUPP)
-		dev_err(ds->dev, "p%d: failed to configure MAC\n", port);
-}
-
 static void mv88e6065_phylink_validate(struct mv88e6xxx_chip *chip, int port,
 				       unsigned long *mask,
 				       struct phylink_link_state *state)
@@ -2721,6 +2696,7 @@ static int mv88e6xxx_mdios_register(struct mv88e6xxx_chip *chip,
 			err = mv88e6xxx_mdio_register(chip, child, true);
 			if (err) {
 				mv88e6xxx_mdios_unregister(chip);
+				of_node_put(child);
 				return err;
 			}
 		}
@@ -4638,7 +4614,6 @@ static int mv88e6xxx_port_egress_floods(struct dsa_switch *ds, int port,
 static const struct dsa_switch_ops mv88e6xxx_switch_ops = {
 	.get_tag_protocol	= mv88e6xxx_get_tag_protocol,
 	.setup			= mv88e6xxx_setup,
-	.adjust_link		= mv88e6xxx_adjust_link,
 	.phylink_validate	= mv88e6xxx_validate,
 	.phylink_mac_link_state	= mv88e6xxx_link_state,
 	.phylink_mac_config	= mv88e6xxx_mac_config,
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 232e8cc96f6d..16f15c93a102 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -2,7 +2,7 @@
 /*
  * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name>
  * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015, 2019, The Linux Foundation. All rights reserved.
  * Copyright (c) 2016 John Crispin <john@phrozen.org>
  */
 
@@ -583,8 +583,11 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv)
 
 	for_each_available_child_of_node(ports, port) {
 		err = of_property_read_u32(port, "reg", &reg);
-		if (err)
+		if (err) {
+			of_node_put(port);
+			of_node_put(ports);
 			return err;
+		}
 
 		if (!dsa_is_user_port(priv->ds, reg))
 			continue;
@@ -595,6 +598,7 @@ qca8k_setup_mdio_bus(struct qca8k_priv *priv)
 			internal_mdio_mask |= BIT(reg);
 	}
 
+	of_node_put(ports);
 	if (!external_mdio_mask && !internal_mdio_mask) {
 		dev_err(priv->dev, "no PHYs are defined.\n");
 		return -EINVAL;
@@ -935,6 +939,8 @@ qca8k_port_enable(struct dsa_switch *ds, int port,
 	qca8k_port_set_status(priv, port, 1);
 	priv->port_sts[port].enabled = 1;
 
+	phy_support_asym_pause(phy);
+
 	return 0;
 }
 
diff --git a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
index 6bfb1696a6f2..9988c9d18567 100644
--- a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
+++ b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
@@ -277,6 +277,18 @@ sja1105et_l2_lookup_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd,
 			SJA1105ET_SIZE_L2_LOOKUP_ENTRY, op);
 }
 
+static size_t sja1105et_dyn_l2_lookup_entry_packing(void *buf, void *entry_ptr,
+						    enum packing_op op)
+{
+	struct sja1105_l2_lookup_entry *entry = entry_ptr;
+	u8 *cmd = buf + SJA1105ET_SIZE_L2_LOOKUP_ENTRY;
+	const int size = SJA1105_SIZE_DYN_CMD;
+
+	sja1105_packing(cmd, &entry->lockeds, 28, 28, size, op);
+
+	return sja1105et_l2_lookup_entry_packing(buf, entry_ptr, op);
+}
+
 static void
 sja1105et_mgmt_route_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd,
 				 enum packing_op op)
@@ -477,7 +489,7 @@ sja1105et_general_params_entry_packing(void *buf, void *entry_ptr,
 /* SJA1105E/T: First generation */
 struct sja1105_dynamic_table_ops sja1105et_dyn_ops[BLK_IDX_MAX_DYN] = {
 	[BLK_IDX_L2_LOOKUP] = {
-		.entry_packing = sja1105et_l2_lookup_entry_packing,
+		.entry_packing = sja1105et_dyn_l2_lookup_entry_packing,
 		.cmd_packing = sja1105et_l2_lookup_cmd_packing,
 		.access = (OP_READ | OP_WRITE | OP_DEL),
 		.max_entry_count = SJA1105_MAX_L2_LOOKUP_COUNT,
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 32bf3a7cc3b6..d073baffc20b 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -218,7 +218,7 @@ static int sja1105_init_l2_lookup_params(struct sja1105_private *priv)
 		/* This selects between Independent VLAN Learning (IVL) and
 		 * Shared VLAN Learning (SVL)
 		 */
-		.shared_learn = false,
+		.shared_learn = true,
 		/* Don't discard management traffic based on ENFPORT -
 		 * we don't perform SMAC port enforcement anyway, so
 		 * what we are setting here doesn't matter.
@@ -625,6 +625,7 @@ static int sja1105_parse_ports_node(struct sja1105_private *priv,
 		if (of_property_read_u32(child, "reg", &index) < 0) {
 			dev_err(dev, "Port number not defined in device tree "
 				"(property \"reg\")\n");
+			of_node_put(child);
 			return -ENODEV;
 		}
 
@@ -634,6 +635,7 @@ static int sja1105_parse_ports_node(struct sja1105_private *priv,
 			dev_err(dev, "Failed to read phy-mode or "
 				"phy-interface-type property for port %d\n",
 				index);
+			of_node_put(child);
 			return -ENODEV;
 		}
 		ports[index].phy_mode = phy_mode;
@@ -643,6 +645,7 @@ static int sja1105_parse_ports_node(struct sja1105_private *priv,
 			if (!of_phy_is_fixed_link(child)) {
 				dev_err(dev, "phy-handle or fixed-link "
 					"properties missing!\n");
+				of_node_put(child);
 				return -ENODEV;
 			}
 			/* phy-handle is missing, but fixed-link isn't.
@@ -1089,8 +1092,13 @@ int sja1105pqrs_fdb_add(struct dsa_switch *ds, int port,
 	l2_lookup.vlanid = vid;
 	l2_lookup.iotag = SJA1105_S_TAG;
 	l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
-	l2_lookup.mask_vlanid = VLAN_VID_MASK;
-	l2_lookup.mask_iotag = BIT(0);
+	if (dsa_port_is_vlan_filtering(&ds->ports[port])) {
+		l2_lookup.mask_vlanid = VLAN_VID_MASK;
+		l2_lookup.mask_iotag = BIT(0);
+	} else {
+		l2_lookup.mask_vlanid = 0;
+		l2_lookup.mask_iotag = 0;
+	}
 	l2_lookup.destports = BIT(port);
 
 	rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
@@ -1147,8 +1155,13 @@ int sja1105pqrs_fdb_del(struct dsa_switch *ds, int port,
 	l2_lookup.vlanid = vid;
 	l2_lookup.iotag = SJA1105_S_TAG;
 	l2_lookup.mask_macaddr = GENMASK_ULL(ETH_ALEN * 8 - 1, 0);
-	l2_lookup.mask_vlanid = VLAN_VID_MASK;
-	l2_lookup.mask_iotag = BIT(0);
+	if (dsa_port_is_vlan_filtering(&ds->ports[port])) {
+		l2_lookup.mask_vlanid = VLAN_VID_MASK;
+		l2_lookup.mask_iotag = BIT(0);
+	} else {
+		l2_lookup.mask_vlanid = 0;
+		l2_lookup.mask_iotag = 0;
+	}
 	l2_lookup.destports = BIT(port);
 
 	rc = sja1105_dynamic_config_read(priv, BLK_IDX_L2_LOOKUP,
@@ -1178,60 +1191,31 @@ static int sja1105_fdb_add(struct dsa_switch *ds, int port,
 			   const unsigned char *addr, u16 vid)
 {
 	struct sja1105_private *priv = ds->priv;
-	u16 rx_vid, tx_vid;
-	int rc, i;
 
-	if (dsa_port_is_vlan_filtering(&ds->ports[port]))
-		return priv->info->fdb_add_cmd(ds, port, addr, vid);
-
-	/* Since we make use of VLANs even when the bridge core doesn't tell us
-	 * to, translate these FDB entries into the correct dsa_8021q ones.
-	 * The basic idea (also repeats for removal below) is:
-	 * - Each of the other front-panel ports needs to be able to forward a
-	 *   pvid-tagged (aka tagged with their rx_vid) frame that matches this
-	 *   DMAC.
-	 * - The CPU port (aka the tx_vid of this port) needs to be able to
-	 *   send a frame matching this DMAC to the specified port.
-	 * For a better picture see net/dsa/tag_8021q.c.
+	/* dsa_8021q is in effect when the bridge's vlan_filtering isn't,
+	 * so the switch still does some VLAN processing internally.
+	 * But Shared VLAN Learning (SVL) is also active, and it will take
+	 * care of autonomous forwarding between the unique pvid's of each
+	 * port.  Here we just make sure that users can't add duplicate FDB
+	 * entries when in this mode - the actual VID doesn't matter except
+	 * for what gets printed in 'bridge fdb show'.  In the case of zero,
+	 * no VID gets printed at all.
 	 */
-	for (i = 0; i < SJA1105_NUM_PORTS; i++) {
-		if (i == port)
-			continue;
-		if (i == dsa_upstream_port(priv->ds, port))
-			continue;
+	if (!dsa_port_is_vlan_filtering(&ds->ports[port]))
+		vid = 0;
 
-		rx_vid = dsa_8021q_rx_vid(ds, i);
-		rc = priv->info->fdb_add_cmd(ds, port, addr, rx_vid);
-		if (rc < 0)
-			return rc;
-	}
-	tx_vid = dsa_8021q_tx_vid(ds, port);
-	return priv->info->fdb_add_cmd(ds, port, addr, tx_vid);
+	return priv->info->fdb_add_cmd(ds, port, addr, vid);
 }
 
 static int sja1105_fdb_del(struct dsa_switch *ds, int port,
 			   const unsigned char *addr, u16 vid)
 {
 	struct sja1105_private *priv = ds->priv;
-	u16 rx_vid, tx_vid;
-	int rc, i;
-
-	if (dsa_port_is_vlan_filtering(&ds->ports[port]))
-		return priv->info->fdb_del_cmd(ds, port, addr, vid);
 
-	for (i = 0; i < SJA1105_NUM_PORTS; i++) {
-		if (i == port)
-			continue;
-		if (i == dsa_upstream_port(priv->ds, port))
-			continue;
+	if (!dsa_port_is_vlan_filtering(&ds->ports[port]))
+		vid = 0;
 
-		rx_vid = dsa_8021q_rx_vid(ds, i);
-		rc = priv->info->fdb_del_cmd(ds, port, addr, rx_vid);
-		if (rc < 0)
-			return rc;
-	}
-	tx_vid = dsa_8021q_tx_vid(ds, port);
-	return priv->info->fdb_del_cmd(ds, port, addr, tx_vid);
+	return priv->info->fdb_del_cmd(ds, port, addr, vid);
 }
 
 static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
@@ -1270,39 +1254,9 @@ static int sja1105_fdb_dump(struct dsa_switch *ds, int port,
 			continue;
 		u64_to_ether_addr(l2_lookup.macaddr, macaddr);
 
-		/* On SJA1105 E/T, the switch doesn't implement the LOCKEDS
-		 * bit, so it doesn't tell us whether a FDB entry is static
-		 * or not.
-		 * But, of course, we can find out - we're the ones who added
-		 * it in the first place.
-		 */
-		if (priv->info->device_id == SJA1105E_DEVICE_ID ||
-		    priv->info->device_id == SJA1105T_DEVICE_ID) {
-			int match;
-
-			match = sja1105_find_static_fdb_entry(priv, port,
-							      &l2_lookup);
-			l2_lookup.lockeds = (match >= 0);
-		}
-
-		/* We need to hide the dsa_8021q VLANs from the user. This
-		 * basically means hiding the duplicates and only showing
-		 * the pvid that is supposed to be active in standalone and
-		 * non-vlan_filtering modes (aka 1).
-		 * - For statically added FDB entries (bridge fdb add), we
-		 *   can convert the TX VID (coming from the CPU port) into the
-		 *   pvid and ignore the RX VIDs of the other ports.
-		 * - For dynamically learned FDB entries, a single entry with
-		 *   no duplicates is learned - that which has the real port's
-		 *   pvid, aka RX VID.
-		 */
-		if (!dsa_port_is_vlan_filtering(&ds->ports[port])) {
-			if (l2_lookup.vlanid == tx_vid ||
-			    l2_lookup.vlanid == rx_vid)
-				l2_lookup.vlanid = 1;
-			else
-				continue;
-		}
+		/* We need to hide the dsa_8021q VLANs from the user. */
+		if (!dsa_port_is_vlan_filtering(&ds->ports[port]))
+			l2_lookup.vlanid = 0;
 		cb(macaddr, l2_lookup.vlanid, l2_lookup.lockeds, data);
 	}
 	return 0;
@@ -1594,6 +1548,7 @@ static int sja1105_vlan_prepare(struct dsa_switch *ds, int port,
  */
 static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 {
+	struct sja1105_l2_lookup_params_entry *l2_lookup_params;
 	struct sja1105_general_params_entry *general_params;
 	struct sja1105_private *priv = ds->priv;
 	struct sja1105_table *table;
@@ -1622,6 +1577,28 @@ static int sja1105_vlan_filtering(struct dsa_switch *ds, int port, bool enabled)
 	general_params->incl_srcpt1 = enabled;
 	general_params->incl_srcpt0 = enabled;
 
+	/* VLAN filtering => independent VLAN learning.
+	 * No VLAN filtering => shared VLAN learning.
+	 *
+	 * In shared VLAN learning mode, untagged traffic still gets
+	 * pvid-tagged, and the FDB table gets populated with entries
+	 * containing the "real" (pvid or from VLAN tag) VLAN ID.
+	 * However the switch performs a masked L2 lookup in the FDB,
+	 * effectively only looking up a frame's DMAC (and not VID) for the
+	 * forwarding decision.
+	 *
+	 * This is extremely convenient for us, because in modes with
+	 * vlan_filtering=0, dsa_8021q actually installs unique pvid's into
+	 * each front panel port. This is good for identification but breaks
+	 * learning badly - the VID of the learnt FDB entry is unique, aka
+	 * no frames coming from any other port are going to have it. So
+	 * for forwarding purposes, this is as though learning was broken
+	 * (all frames get flooded).
+	 */
+	table = &priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS];
+	l2_lookup_params = table->entries;
+	l2_lookup_params->shared_learn = !enabled;
+
 	rc = sja1105_static_config_reload(priv);
 	if (rc)
 		dev_err(ds->dev, "Failed to change VLAN Ethertype\n");
@@ -1751,6 +1728,8 @@ static void sja1105_teardown(struct dsa_switch *ds)
 
 	cancel_work_sync(&priv->tagger_data.rxtstamp_work);
 	skb_queue_purge(&priv->tagger_data.skb_rxtstamp_queue);
+	sja1105_ptp_clock_unregister(priv);
+	sja1105_static_config_free(&priv->static_config);
 }
 
 static int sja1105_mgmt_xmit(struct dsa_switch *ds, int port, int slot,
@@ -2208,9 +2187,7 @@ static int sja1105_remove(struct spi_device *spi)
 {
 	struct sja1105_private *priv = spi_get_drvdata(spi);
 
-	sja1105_ptp_clock_unregister(priv);
 	dsa_unregister_switch(priv->ds);
-	sja1105_static_config_free(&priv->static_config);
 	return 0;
 }
 
diff --git a/drivers/net/dsa/sja1105/sja1105_ptp.c b/drivers/net/dsa/sja1105/sja1105_ptp.c
index d19cfdf681af..d8e8dd59f3d1 100644
--- a/drivers/net/dsa/sja1105/sja1105_ptp.c
+++ b/drivers/net/dsa/sja1105/sja1105_ptp.c
@@ -369,16 +369,15 @@ int sja1105_ptp_clock_register(struct sja1105_private *priv)
 		.mult = SJA1105_CC_MULT,
 	};
 	mutex_init(&priv->ptp_lock);
-	INIT_DELAYED_WORK(&priv->refresh_work, sja1105_ptp_overflow_check);
-
-	schedule_delayed_work(&priv->refresh_work, SJA1105_REFRESH_INTERVAL);
-
 	priv->ptp_caps = sja1105_ptp_caps;
 
 	priv->clock = ptp_clock_register(&priv->ptp_caps, ds->dev);
 	if (IS_ERR_OR_NULL(priv->clock))
 		return PTR_ERR(priv->clock);
 
+	INIT_DELAYED_WORK(&priv->refresh_work, sja1105_ptp_overflow_check);
+	schedule_delayed_work(&priv->refresh_work, SJA1105_REFRESH_INTERVAL);
+
 	return sja1105_ptp_reset(priv);
 }