net: dsa: convert cross-chip notifiers to iterate using dp

The majority of cross-chip switch notifiers need to filter in some way
over the type of ports: some install VLANs etc on all cascade ports.

The difference is that the matching function, which filters by port
type, is separate from the function where the iteration happens. So this
patch needs to refactor the matching functions' prototypes as well, to
take the dp as argument.

In a future patch/series, I might convert dsa_towards_port to return a
struct dsa_port *dp too, but at the moment it is a bit entangled with
dsa_routing_port which is also used by mv88e6xxx and they both return an
int port. So keep dsa_towards_port the way it is and convert it into a
dp using dsa_to_port.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 43 insertions, 42 deletions

diff --git a/net/dsa/tag_8021q.c b/net/dsa/tag_8021q.c
index 935d0264ebd8..8f4e0af2f74f 100644
--- a/net/dsa/tag_8021q.c
+++ b/net/dsa/tag_8021q.c
@@ -138,12 +138,13 @@ dsa_tag_8021q_vlan_find(struct dsa_8021q_context *ctx, int port, u16 vid)
 	return NULL;
 }
 
-static int dsa_switch_do_tag_8021q_vlan_add(struct dsa_switch *ds, int port,
-					    u16 vid, u16 flags)
+static int dsa_port_do_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid,
+					  u16 flags)
 {
-	struct dsa_8021q_context *ctx = ds->tag_8021q_ctx;
-	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_8021q_context *ctx = dp->ds->tag_8021q_ctx;
+	struct dsa_switch *ds = dp->ds;
 	struct dsa_tag_8021q_vlan *v;
+	int port = dp->index;
 	int err;
 
 	/* No need to bother with refcounting for user ports */
@@ -174,12 +175,12 @@ static int dsa_switch_do_tag_8021q_vlan_add(struct dsa_switch *ds, int port,
 	return 0;
 }
 
-static int dsa_switch_do_tag_8021q_vlan_del(struct dsa_switch *ds, int port,
-					    u16 vid)
+static int dsa_port_do_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid)
 {
-	struct dsa_8021q_context *ctx = ds->tag_8021q_ctx;
-	struct dsa_port *dp = dsa_to_port(ds, port);
+	struct dsa_8021q_context *ctx = dp->ds->tag_8021q_ctx;
+	struct dsa_switch *ds = dp->ds;
 	struct dsa_tag_8021q_vlan *v;
+	int port = dp->index;
 	int err;
 
 	/* No need to bother with refcounting for user ports */
@@ -206,14 +207,16 @@ static int dsa_switch_do_tag_8021q_vlan_del(struct dsa_switch *ds, int port,
 }
 
 static bool
-dsa_switch_tag_8021q_vlan_match(struct dsa_switch *ds, int port,
-				struct dsa_notifier_tag_8021q_vlan_info *info)
+dsa_port_tag_8021q_vlan_match(struct dsa_port *dp,
+			      struct dsa_notifier_tag_8021q_vlan_info *info)
 {
-	if (dsa_is_dsa_port(ds, port) || dsa_is_cpu_port(ds, port))
+	struct dsa_switch *ds = dp->ds;
+
+	if (dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp))
 		return true;
 
 	if (ds->dst->index == info->tree_index && ds->index == info->sw_index)
-		return port == info->port;
+		return dp->index == info->port;
 
 	return false;
 }
@@ -221,7 +224,8 @@ dsa_switch_tag_8021q_vlan_match(struct dsa_switch *ds, int port,
 int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 				  struct dsa_notifier_tag_8021q_vlan_info *info)
 {
-	int port, err;
+	struct dsa_port *dp;
+	int err;
 
 	/* Since we use dsa_broadcast(), there might be other switches in other
 	 * trees which don't support tag_8021q, so don't return an error.
@@ -231,21 +235,20 @@ int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 	if (!ds->ops->tag_8021q_vlan_add || !ds->tag_8021q_ctx)
 		return 0;
 
-	for (port = 0; port < ds->num_ports; port++) {
-		if (dsa_switch_tag_8021q_vlan_match(ds, port, info)) {
+	dsa_switch_for_each_port(dp, ds) {
+		if (dsa_port_tag_8021q_vlan_match(dp, info)) {
 			u16 flags = 0;
 
-			if (dsa_is_user_port(ds, port))
+			if (dsa_port_is_user(dp))
 				flags |= BRIDGE_VLAN_INFO_UNTAGGED;
 
 			if (vid_is_dsa_8021q_rxvlan(info->vid) &&
 			    dsa_8021q_rx_switch_id(info->vid) == ds->index &&
-			    dsa_8021q_rx_source_port(info->vid) == port)
+			    dsa_8021q_rx_source_port(info->vid) == dp->index)
 				flags |= BRIDGE_VLAN_INFO_PVID;
 
-			err = dsa_switch_do_tag_8021q_vlan_add(ds, port,
-							       info->vid,
-							       flags);
+			err = dsa_port_do_tag_8021q_vlan_add(dp, info->vid,
+							     flags);
 			if (err)
 				return err;
 		}
@@ -257,15 +260,15 @@ int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds,
 int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
 				  struct dsa_notifier_tag_8021q_vlan_info *info)
 {
-	int port, err;
+	struct dsa_port *dp;
+	int err;
 
 	if (!ds->ops->tag_8021q_vlan_del || !ds->tag_8021q_ctx)
 		return 0;
 
-	for (port = 0; port < ds->num_ports; port++) {
-		if (dsa_switch_tag_8021q_vlan_match(ds, port, info)) {
-			err = dsa_switch_do_tag_8021q_vlan_del(ds, port,
-							       info->vid);
+	dsa_switch_for_each_port(dp, ds) {
+		if (dsa_port_tag_8021q_vlan_match(dp, info)) {
+			err = dsa_port_do_tag_8021q_vlan_del(dp, info->vid);
 			if (err)
 				return err;
 		}
@@ -321,15 +324,14 @@ int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds,
  * +-+-----+-+-----+-+-----+-+-----+-+    +-+-----+-+-----+-+-----+-+-----+-+
  *   swp0    swp1    swp2    swp3           swp0    swp1    swp2    swp3
  */
-static bool dsa_tag_8021q_bridge_match(struct dsa_switch *ds, int port,
-				       struct dsa_notifier_bridge_info *info)
+static bool
+dsa_port_tag_8021q_bridge_match(struct dsa_port *dp,
+				struct dsa_notifier_bridge_info *info)
 {
-	struct dsa_port *dp = dsa_to_port(ds, port);
-
 	/* Don't match on self */
-	if (ds->dst->index == info->tree_index &&
-	    ds->index == info->sw_index &&
-	    port == info->port)
+	if (dp->ds->dst->index == info->tree_index &&
+	    dp->ds->index == info->sw_index &&
+	    dp->index == info->port)
 		return false;
 
 	if (dsa_port_is_user(dp))
@@ -343,8 +345,9 @@ int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
 {
 	struct dsa_switch *targeted_ds;
 	struct dsa_port *targeted_dp;
+	struct dsa_port *dp;
 	u16 targeted_rx_vid;
-	int err, port;
+	int err;
 
 	if (!ds->tag_8021q_ctx)
 		return 0;
@@ -353,11 +356,10 @@ int dsa_tag_8021q_bridge_join(struct dsa_switch *ds,
 	targeted_dp = dsa_to_port(targeted_ds, info->port);
 	targeted_rx_vid = dsa_8021q_rx_vid(targeted_ds, info->port);
 
-	for (port = 0; port < ds->num_ports; port++) {
-		struct dsa_port *dp = dsa_to_port(ds, port);
-		u16 rx_vid = dsa_8021q_rx_vid(ds, port);
+	dsa_switch_for_each_port(dp, ds) {
+		u16 rx_vid = dsa_8021q_rx_vid(ds, dp->index);
 
-		if (!dsa_tag_8021q_bridge_match(ds, port, info))
+		if (!dsa_port_tag_8021q_bridge_match(dp, info))
 			continue;
 
 		/* Install the RX VID of the targeted port in our VLAN table */
@@ -379,8 +381,8 @@ int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
 {
 	struct dsa_switch *targeted_ds;
 	struct dsa_port *targeted_dp;
+	struct dsa_port *dp;
 	u16 targeted_rx_vid;
-	int port;
 
 	if (!ds->tag_8021q_ctx)
 		return 0;
@@ -389,11 +391,10 @@ int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds,
 	targeted_dp = dsa_to_port(targeted_ds, info->port);
 	targeted_rx_vid = dsa_8021q_rx_vid(targeted_ds, info->port);
 
-	for (port = 0; port < ds->num_ports; port++) {
-		struct dsa_port *dp = dsa_to_port(ds, port);
-		u16 rx_vid = dsa_8021q_rx_vid(ds, port);
+	dsa_switch_for_each_port(dp, ds) {
+		u16 rx_vid = dsa_8021q_rx_vid(ds, dp->index);
 
-		if (!dsa_tag_8021q_bridge_match(ds, port, info))
+		if (!dsa_port_tag_8021q_bridge_match(dp, info))
 			continue;
 
 		/* Remove the RX VID of the targeted port from our VLAN table */