netdev - [PATCH v2 net-next 3/8] net: dsa: mv88e6xxx: Provide generic VTU iterator

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Message-Id: <20210318141550.646383-4-tobias@waldekranz.com>
Date:   Thu, 18 Mar 2021 15:15:45 +0100
From:   Tobias Waldekranz <tobias@...dekranz.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        olteanv@...il.com, netdev@...r.kernel.org
Subject: [PATCH v2 net-next 3/8] net: dsa: mv88e6xxx: Provide generic VTU iterator

Move the intricacies of correctly iterating over the VTU to a common
implementation.

Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/dsa/mv88e6xxx/chip.c | 100 ++++++++++++++++++++-----------
 1 file changed, 64 insertions(+), 36 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index ed38b4431d74..0a4e467179c9 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -1511,6 +1511,37 @@ static int mv88e6xxx_vtu_getnext(struct mv88e6xxx_chip *chip,
 	return chip->info->ops->vtu_getnext(chip, entry);
 }
 
+static int mv88e6xxx_vtu_walk(struct mv88e6xxx_chip *chip,
+			      int (*cb)(struct mv88e6xxx_chip *chip,
+					const struct mv88e6xxx_vtu_entry *entry,
+					void *priv),
+			      void *priv)
+{
+	struct mv88e6xxx_vtu_entry entry = {
+		.vid = mv88e6xxx_max_vid(chip),
+		.valid = false,
+	};
+	int err;
+
+	if (!chip->info->ops->vtu_getnext)
+		return -EOPNOTSUPP;
+
+	do {
+		err = chip->info->ops->vtu_getnext(chip, &entry);
+		if (err)
+			return err;
+
+		if (!entry.valid)
+			break;
+
+		err = cb(chip, &entry, priv);
+		if (err)
+			return err;
+	} while (entry.vid < mv88e6xxx_max_vid(chip));
+
+	return 0;
+}
+
 static int mv88e6xxx_vtu_loadpurge(struct mv88e6xxx_chip *chip,
 				   struct mv88e6xxx_vtu_entry *entry)
 {
@@ -1520,9 +1551,18 @@ static int mv88e6xxx_vtu_loadpurge(struct mv88e6xxx_chip *chip,
 	return chip->info->ops->vtu_loadpurge(chip, entry);
 }
 
+static int mv88e6xxx_fid_map_vlan(struct mv88e6xxx_chip *chip,
+				  const struct mv88e6xxx_vtu_entry *entry,
+				  void *_fid_bitmap)
+{
+	unsigned long *fid_bitmap = _fid_bitmap;
+
+	set_bit(entry->fid, fid_bitmap);
+	return 0;
+}
+
 int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *fid_bitmap)
 {
-	struct mv88e6xxx_vtu_entry vlan;
 	int i, err;
 	u16 fid;
 
@@ -1538,21 +1578,7 @@ int mv88e6xxx_fid_map(struct mv88e6xxx_chip *chip, unsigned long *fid_bitmap)
 	}
 
 	/* Set every FID bit used by the VLAN entries */
-	vlan.vid = mv88e6xxx_max_vid(chip);
-	vlan.valid = false;
-
-	do {
-		err = mv88e6xxx_vtu_getnext(chip, &vlan);
-		if (err)
-			return err;
-
-		if (!vlan.valid)
-			break;
-
-		set_bit(vlan.fid, fid_bitmap);
-	} while (vlan.vid < mv88e6xxx_max_vid(chip));
-
-	return 0;
+	return mv88e6xxx_vtu_walk(chip, mv88e6xxx_fid_map_vlan, fid_bitmap);
 }
 
 static int mv88e6xxx_atu_new(struct mv88e6xxx_chip *chip, u16 *fid)
@@ -2198,10 +2224,30 @@ static int mv88e6xxx_port_db_dump_fid(struct mv88e6xxx_chip *chip,
 	return err;
 }
 
+struct mv88e6xxx_port_db_dump_vlan_ctx {
+	int port;
+	dsa_fdb_dump_cb_t *cb;
+	void *data;
+};
+
+static int mv88e6xxx_port_db_dump_vlan(struct mv88e6xxx_chip *chip,
+				       const struct mv88e6xxx_vtu_entry *entry,
+				       void *_data)
+{
+	struct mv88e6xxx_port_db_dump_vlan_ctx *ctx = _data;
+
+	return mv88e6xxx_port_db_dump_fid(chip, entry->fid, entry->vid,
+					  ctx->port, ctx->cb, ctx->data);
+}
+
 static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port,
 				  dsa_fdb_dump_cb_t *cb, void *data)
 {
-	struct mv88e6xxx_vtu_entry vlan;
+	struct mv88e6xxx_port_db_dump_vlan_ctx ctx = {
+		.port = port,
+		.cb = cb,
+		.data = data,
+	};
 	u16 fid;
 	int err;
 
@@ -2214,25 +2260,7 @@ static int mv88e6xxx_port_db_dump(struct mv88e6xxx_chip *chip, int port,
 	if (err)
 		return err;
 
-	/* Dump VLANs' Filtering Information Databases */
-	vlan.vid = mv88e6xxx_max_vid(chip);
-	vlan.valid = false;
-
-	do {
-		err = mv88e6xxx_vtu_getnext(chip, &vlan);
-		if (err)
-			return err;
-
-		if (!vlan.valid)
-			break;
-
-		err = mv88e6xxx_port_db_dump_fid(chip, vlan.fid, vlan.vid, port,
-						 cb, data);
-		if (err)
-			return err;
-	} while (vlan.vid < mv88e6xxx_max_vid(chip));
-
-	return err;
+	return mv88e6xxx_vtu_walk(chip, mv88e6xxx_port_db_dump_vlan, &ctx);
 }
 
 static int mv88e6xxx_port_fdb_dump(struct dsa_switch *ds, int port,
-- 
2.25.1