Merge branch 'dsa-define-port-types'

Vivien Didelot says:

====================
net: dsa: define port types

The DSA code currently has 3 bitmaps in the dsa_switch structure:
cpu_port_mask, dsa_port_mask and enabled_port_mask.

They are used to store the type of each switch port. This dates back
from when DSA didn't have a dsa_port structure to hold port-specific
data.

The dsa_switch structure is mainly used to communicate with DSA drivers
and must not contain such static data parsed from DTS or pdata, which
belongs the DSA core structures, such as dsa_switch_tree and dsa_port.

Also the enabled_port_mask is misleading, often misinterpreted as the
complement of disabled ports (thus including DSA and CPU ports), while
in fact it only masks the user ports.

A port can be of 3 types when it is not unused: "cpu" (interfacing with
a master device), "dsa" (interconnecting with another "dsa" port from
another switch chip), or "user" (user-facing port.)

This patchset first fixes the usage of DSA port type helpers, then
defines the DSA_PORT_TYPE_UNUSED, DSA_PORT_TYPE_CPU, DSA_PORT_TYPE_DSA,
and DSA_PORT_TYPE_USER port types, and finally removes the misleading
port bitmaps.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 62 insertions, 46 deletions

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index b48cf0487b43..c74a50112551 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -873,7 +873,7 @@ static int b53_setup(struct dsa_switch *ds)
 	for (port = 0; port < dev->num_ports; port++) {
 		if (dsa_is_cpu_port(ds, port))
 			b53_enable_cpu_port(dev, port);
-		else if (!(BIT(port) & ds->enabled_port_mask))
+		else if (dsa_is_unused_port(ds, port))
 			b53_disable_port(ds, port, NULL);
 	}
 
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 2574a52ee161..7f47400e557e 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -652,8 +652,7 @@ static int bcm_sf2_sw_suspend(struct dsa_switch *ds)
 	 * bcm_sf2_sw_setup
 	 */
 	for (port = 0; port < DSA_MAX_PORTS; port++) {
-		if ((1 << port) & ds->enabled_port_mask ||
-		    dsa_is_cpu_port(ds, port))
+		if (dsa_is_user_port(ds, port) || dsa_is_cpu_port(ds, port))
 			bcm_sf2_port_disable(ds, port, NULL);
 	}
 
@@ -676,7 +675,7 @@ static int bcm_sf2_sw_resume(struct dsa_switch *ds)
 		bcm_sf2_gphy_enable_set(ds, true);
 
 	for (port = 0; port < DSA_MAX_PORTS; port++) {
-		if ((1 << port) & ds->enabled_port_mask)
+		if (dsa_is_user_port(ds, port))
 			bcm_sf2_port_setup(ds, port, NULL);
 		else if (dsa_is_cpu_port(ds, port))
 			bcm_sf2_imp_setup(ds, port);
@@ -771,7 +770,7 @@ static void bcm_sf2_sw_configure_vlan(struct dsa_switch *ds)
 	bcm_sf2_vlan_op(priv, ARLA_VTBL_CMD_CLEAR);
 
 	for (port = 0; port < priv->hw_params.num_ports; port++) {
-		if (!((1 << port) & ds->enabled_port_mask))
+		if (!dsa_is_user_port(ds, port))
 			continue;
 
 		core_writel(priv, 1, CORE_DEFAULT_1Q_TAG_P(port));
@@ -786,7 +785,7 @@ static int bcm_sf2_sw_setup(struct dsa_switch *ds)
 	/* Enable all valid ports and disable those unused */
 	for (port = 0; port < priv->hw_params.num_ports; port++) {
 		/* IMP port receives special treatment */
-		if ((1 << port) & ds->enabled_port_mask)
+		if (dsa_is_user_port(ds, port))
 			bcm_sf2_port_setup(ds, port, NULL);
 		else if (dsa_is_cpu_port(ds, port))
 			bcm_sf2_imp_setup(ds, port);
diff --git a/drivers/net/dsa/bcm_sf2_cfp.c b/drivers/net/dsa/bcm_sf2_cfp.c
index 4feb507eeee0..b721a2009b50 100644
--- a/drivers/net/dsa/bcm_sf2_cfp.c
+++ b/drivers/net/dsa/bcm_sf2_cfp.c
@@ -750,7 +750,7 @@ static int bcm_sf2_cfp_rule_set(struct dsa_switch *ds, int port,
 	port_num = fs->ring_cookie / SF2_NUM_EGRESS_QUEUES;
 
 	if (fs->ring_cookie == RX_CLS_FLOW_DISC ||
-	    !(BIT(port_num) & ds->enabled_port_mask) ||
+	    !dsa_is_user_port(ds, port_num) ||
 	    port_num >= priv->hw_params.num_ports)
 		return -EINVAL;
 	/*
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 21431be2831e..627c039f12ca 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -688,7 +688,7 @@ mt7530_cpu_port_enable(struct mt7530_priv *priv,
 	 * the switch
 	 */
 	mt7530_write(priv, MT7530_PCR_P(port),
-		     PCR_MATRIX(priv->ds->enabled_port_mask));
+		     PCR_MATRIX(dsa_user_ports(priv->ds)));
 
 	return 0;
 }
@@ -781,7 +781,7 @@ mt7530_port_bridge_join(struct dsa_switch *ds, int port,
 		 * same bridge. If the port is disabled, port matrix is kept
 		 * and not being setup until the port becomes enabled.
 		 */
-		if (ds->enabled_port_mask & BIT(i) && i != port) {
+		if (dsa_is_user_port(ds, i) && i != port) {
 			if (dsa_to_port(ds, i)->bridge_dev != bridge)
 				continue;
 			if (priv->ports[i].enable)
@@ -818,7 +818,7 @@ mt7530_port_bridge_leave(struct dsa_switch *ds, int port,
 		 * in the same bridge. If the port is disabled, port matrix
 		 * is kept and not being setup until the port becomes enabled.
 		 */
-		if (ds->enabled_port_mask & BIT(i) && i != port) {
+		if (dsa_is_user_port(ds, i) && i != port) {
 			if (dsa_to_port(ds, i)->bridge_dev != bridge)
 				continue;
 			if (priv->ports[i].enable)
diff --git a/drivers/net/dsa/mv88e6060.c b/drivers/net/dsa/mv88e6060.c
index f78b9e13be1c..45768e3c5bc5 100644
--- a/drivers/net/dsa/mv88e6060.c
+++ b/drivers/net/dsa/mv88e6060.c
@@ -175,9 +175,8 @@ static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
 	 */
 	REG_WRITE(addr, PORT_VLAN_MAP,
 		  ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
-		   (dsa_is_cpu_port(ds, p) ?
-			ds->enabled_port_mask :
-			BIT(dsa_to_port(ds, p)->cpu_dp->index)));
+		   (dsa_is_cpu_port(ds, p) ? dsa_user_ports(ds) :
+		    BIT(dsa_to_port(ds, p)->cpu_dp->index)));
 
 	/* Port Association Vector: when learning source addresses
 	 * of packets, add the address to the address database using
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 677d6902807e..09a66d4d9492 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1676,7 +1676,7 @@ static int mv88e6xxx_setup_port_mode(struct mv88e6xxx_chip *chip, int port)
 	if (dsa_is_dsa_port(chip->ds, port))
 		return mv88e6xxx_set_port_mode_dsa(chip, port);
 
-	if (dsa_is_normal_port(chip->ds, port))
+	if (dsa_is_user_port(chip->ds, port))
 		return mv88e6xxx_set_port_mode_normal(chip, port);
 
 	/* Setup CPU port mode depending on its supported tag format */
@@ -2005,6 +2005,9 @@ static int mv88e6xxx_setup(struct dsa_switch *ds)
 
 	/* Setup Switch Port Registers */
 	for (i = 0; i < mv88e6xxx_num_ports(chip); i++) {
+		if (dsa_is_unused_port(ds, i))
+			continue;
+
 		err = mv88e6xxx_setup_port(chip, i);
 		if (err)
 			goto unlock;
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index d1b0b1fb632f..cf72e274275f 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -536,7 +536,7 @@ qca8k_setup(struct dsa_switch *ds)
 
 	/* Disable MAC by default on all user ports */
 	for (i = 1; i < QCA8K_NUM_PORTS; i++)
-		if (ds->enabled_port_mask & BIT(i))
+		if (dsa_is_user_port(ds, i))
 			qca8k_port_set_status(priv, i, 0);
 
 	/* Forward all unknown frames to CPU port for Linux processing */
@@ -551,12 +551,11 @@ qca8k_setup(struct dsa_switch *ds)
 		/* CPU port gets connected to all user ports of the switch */
 		if (dsa_is_cpu_port(ds, i)) {
 			qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT),
-				  QCA8K_PORT_LOOKUP_MEMBER,
-				  ds->enabled_port_mask);
+				  QCA8K_PORT_LOOKUP_MEMBER, dsa_user_ports(ds));
 		}
 
 		/* Invividual user ports get connected to CPU port only */
-		if (ds->enabled_port_mask & BIT(i)) {
+		if (dsa_is_user_port(ds, i)) {
 			int shift = 16 * (i % 2);
 
 			qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i),
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 38961ef91d3d..50e276dc4c01 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -180,6 +180,13 @@ struct dsa_port {
 	struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
 			       struct packet_type *pt);
 
+	enum {
+		DSA_PORT_TYPE_UNUSED = 0,
+		DSA_PORT_TYPE_CPU,
+		DSA_PORT_TYPE_DSA,
+		DSA_PORT_TYPE_USER,
+	} type;
+
 	struct dsa_switch	*ds;
 	unsigned int		index;
 	const char		*name;
@@ -233,9 +240,6 @@ struct dsa_switch {
 	/*
 	 * Slave mii_bus and devices for the individual ports.
 	 */
-	u32			dsa_port_mask;
-	u32			cpu_port_mask;
-	u32			enabled_port_mask;
 	u32			phys_mii_mask;
 	struct mii_bus		*slave_mii_bus;
 
@@ -254,24 +258,41 @@ struct dsa_switch {
 	struct dsa_port ports[];
 };
 
+static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
+{
+	return &ds->ports[p];
+}
+
+static inline bool dsa_is_unused_port(struct dsa_switch *ds, int p)
+{
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_UNUSED;
+}
+
 static inline bool dsa_is_cpu_port(struct dsa_switch *ds, int p)
 {
-	return !!(ds->cpu_port_mask & (1 << p));
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_CPU;
 }
 
 static inline bool dsa_is_dsa_port(struct dsa_switch *ds, int p)
 {
-	return !!((ds->dsa_port_mask) & (1 << p));
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_DSA;
 }
 
-static inline bool dsa_is_normal_port(struct dsa_switch *ds, int p)
+static inline bool dsa_is_user_port(struct dsa_switch *ds, int p)
 {
-	return !dsa_is_cpu_port(ds, p) && !dsa_is_dsa_port(ds, p);
+	return dsa_to_port(ds, p)->type == DSA_PORT_TYPE_USER;
 }
 
-static inline const struct dsa_port *dsa_to_port(struct dsa_switch *ds, int p)
+static inline u32 dsa_user_ports(struct dsa_switch *ds)
 {
-	return &ds->ports[p];
+	u32 mask = 0;
+	int p;
+
+	for (p = 0; p < ds->num_ports; p++)
+		if (dsa_is_user_port(ds, p))
+			mask |= BIT(p);
+
+	return mask;
 }
 
 static inline u8 dsa_upstream_port(struct dsa_switch *ds)
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index a3abf7a7b9a2..fe0081730305 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -201,7 +201,7 @@ static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
 #ifdef CONFIG_PM_SLEEP
 static bool dsa_is_port_initialized(struct dsa_switch *ds, int p)
 {
-	return ds->enabled_port_mask & (1 << p) && ds->ports[p].slave;
+	return dsa_is_user_port(ds, p) && ds->ports[p].slave;
 }
 
 int dsa_switch_suspend(struct dsa_switch *ds)
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 62485a57dbfc..ec58654a71cd 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -184,7 +184,7 @@ static int dsa_ds_complete(struct dsa_switch_tree *dst, struct dsa_switch *ds)
 		if (err != 0)
 			return err;
 
-		ds->dsa_port_mask |= BIT(index);
+		port->type = DSA_PORT_TYPE_DSA;
 	}
 
 	return 0;
@@ -312,7 +312,7 @@ static int dsa_ds_apply(struct dsa_switch_tree *dst, struct dsa_switch *ds)
 	 * the slave MDIO bus driver rely on these values for probing PHY
 	 * devices or not
 	 */
-	ds->phys_mii_mask = ds->enabled_port_mask;
+	ds->phys_mii_mask |= dsa_user_ports(ds);
 
 	/* Add the switch to devlink before calling setup, so that setup can
 	 * add dpipe tables
@@ -499,11 +499,7 @@ static int dsa_cpu_parse(struct dsa_port *port, u32 index,
 		dst->cpu_dp->master = ethernet_dev;
 	}
 
-	/* Initialize cpu_port_mask now for drv->setup()
-	 * to have access to a correct value, just like what
-	 * net/dsa/dsa.c::dsa_switch_setup_one does.
-	 */
-	ds->cpu_port_mask |= BIT(index);
+	port->type = DSA_PORT_TYPE_CPU;
 
 	tag_protocol = ds->ops->get_tag_protocol(ds);
 	tag_ops = dsa_resolve_tag_protocol(tag_protocol);
@@ -538,11 +534,7 @@ static int dsa_ds_parse(struct dsa_switch_tree *dst, struct dsa_switch *ds)
 			if (err)
 				return err;
 		} else {
-			/* Initialize enabled_port_mask now for drv->setup()
-			 * to have access to a correct value, just like what
-			 * net/dsa/dsa.c::dsa_switch_setup_one does.
-			 */
-			ds->enabled_port_mask |= BIT(index);
+			port->type = DSA_PORT_TYPE_USER;
 		}
 
 	}
diff --git a/net/dsa/legacy.c b/net/dsa/legacy.c
index 93c1c43bcc58..93e1b116ef83 100644
--- a/net/dsa/legacy.c
+++ b/net/dsa/legacy.c
@@ -101,6 +101,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 	struct dsa_chip_data *cd = ds->cd;
 	bool valid_name_found = false;
 	int index = ds->index;
+	struct dsa_port *dp;
 	int i, ret;
 
 	/*
@@ -109,6 +110,8 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 	for (i = 0; i < ds->num_ports; i++) {
 		char *name;
 
+		dp = &ds->ports[i];
+
 		name = cd->port_names[i];
 		if (name == NULL)
 			continue;
@@ -121,11 +124,11 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 			}
 			dst->cpu_dp = &ds->ports[i];
 			dst->cpu_dp->master = master;
-			ds->cpu_port_mask |= 1 << i;
+			dp->type = DSA_PORT_TYPE_CPU;
 		} else if (!strcmp(name, "dsa")) {
-			ds->dsa_port_mask |= 1 << i;
+			dp->type = DSA_PORT_TYPE_DSA;
 		} else {
-			ds->enabled_port_mask |= 1 << i;
+			dp->type = DSA_PORT_TYPE_USER;
 		}
 		valid_name_found = true;
 	}
@@ -136,7 +139,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 	/* Make the built-in MII bus mask match the number of ports,
 	 * switch drivers can override this later
 	 */
-	ds->phys_mii_mask = ds->enabled_port_mask;
+	ds->phys_mii_mask |= dsa_user_ports(ds);
 
 	/*
 	 * If the CPU connects to this switch, set the switch tree
@@ -190,7 +193,7 @@ static int dsa_switch_setup_one(struct dsa_switch *ds,
 		ds->ports[i].dn = cd->port_dn[i];
 		ds->ports[i].cpu_dp = dst->cpu_dp;
 
-		if (!(ds->enabled_port_mask & (1 << i)))
+		if (dsa_is_user_port(ds, i))
 			continue;
 
 		ret = dsa_slave_create(&ds->ports[i], cd->port_names[i]);
@@ -258,7 +261,7 @@ static void dsa_switch_destroy(struct dsa_switch *ds)
 
 	/* Destroy network devices for physical switch ports. */
 	for (port = 0; port < ds->num_ports; port++) {
-		if (!(ds->enabled_port_mask & (1 << port)))
+		if (!dsa_is_user_port(ds, port))
 			continue;
 
 		if (!ds->ports[port].slave)