netdev - [PATCH net 1/2] net: dsa: ocelot: the MAC table on Felix is twice as large

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Date:   Mon,  4 May 2020 01:20:26 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     idosch@...sch.org, allan.nielsen@...rochip.com,
        horatiu.vultur@...rochip.com, alexandre.belloni@...tlin.com,
        antoine.tenart@...tlin.com, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com, joergen.andreasen@...rochip.com,
        claudiu.manoil@....com, UNGLinuxDriver@...rochip.com,
        alexandru.marginean@....com, xiaoliang.yang_1@....com,
        yangbo.lu@....com, po.liu@....com, jiri@...lanox.com,
        kuba@...nel.org
Subject: [PATCH net 1/2] net: dsa: ocelot: the MAC table on Felix is twice as large

From: Vladimir Oltean <vladimir.oltean@....com>

When running 'bridge fdb dump' on Felix, sometimes learnt and static MAC
addresses would appear, sometimes they wouldn't.

Turns out, the MAC table has 4096 entries on VSC7514 (Ocelot) and 8192
entries on VSC9959 (Felix), so the existing code from the Ocelot common
library only dumped half of Felix's MAC table. They are both organized
as a 4-way set-associative TCAM, so we just need a single variable
indicating the correct number of rows.

Fixes: 56051948773e ("net: dsa: ocelot: add driver for Felix switch family")
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/dsa/ocelot/felix.c          | 1 +
 drivers/net/dsa/ocelot/felix.h          | 1 +
 drivers/net/dsa/ocelot/felix_vsc9959.c  | 1 +
 drivers/net/ethernet/mscc/ocelot.c      | 6 ++----
 drivers/net/ethernet/mscc/ocelot_regs.c | 1 +
 include/soc/mscc/ocelot.h               | 1 +
 6 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index 6aaea95029a9..9aa6a3d7afd4 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -401,6 +401,7 @@ static int felix_init_structs(struct felix *felix, int num_phys_ports)
 	ocelot->stats_layout	= felix->info->stats_layout;
 	ocelot->num_stats	= felix->info->num_stats;
 	ocelot->shared_queue_sz	= felix->info->shared_queue_sz;
+	ocelot->num_mact_rows	= felix->info->num_mact_rows;
 	ocelot->vcap		= felix->info->vcap;
 	ocelot->ops		= felix->info->ops;
 
diff --git a/drivers/net/dsa/ocelot/felix.h b/drivers/net/dsa/ocelot/felix.h
index ce723deb9b5f..6b0dedc24a18 100644
--- a/drivers/net/dsa/ocelot/felix.h
+++ b/drivers/net/dsa/ocelot/felix.h
@@ -16,6 +16,7 @@ struct felix_info {
 	const u32 *const		*map;
 	const struct ocelot_ops		*ops;
 	int				shared_queue_sz;
+	int				num_mact_rows;
 	const struct ocelot_stat_layout	*stats_layout;
 	unsigned int			num_stats;
 	int				num_ports;
diff --git a/drivers/net/dsa/ocelot/felix_vsc9959.c b/drivers/net/dsa/ocelot/felix_vsc9959.c
index f0c566c1c355..f362c6b84235 100644
--- a/drivers/net/dsa/ocelot/felix_vsc9959.c
+++ b/drivers/net/dsa/ocelot/felix_vsc9959.c
@@ -1310,6 +1310,7 @@ struct felix_info felix_info_vsc9959 = {
 	.num_stats		= ARRAY_SIZE(vsc9959_stats_layout),
 	.vcap			= vsc9959_vcap_props,
 	.shared_queue_sz	= 128 * 1024,
+	.num_mact_rows		= 2048,
 	.num_ports		= 6,
 	.switch_pci_bar		= 4,
 	.imdio_pci_bar		= 0,
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 884d547307f8..186ac4cd2ce6 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -1038,10 +1038,8 @@ int ocelot_fdb_dump(struct ocelot *ocelot, int port,
 {
 	int i, j;
 
-	/* Loop through all the mac tables entries. There are 1024 rows of 4
-	 * entries.
-	 */
-	for (i = 0; i < 1024; i++) {
+	/* Loop through all the mac tables entries. */
+	for (i = 0; i < ocelot->num_mact_rows; i++) {
 		for (j = 0; j < 4; j++) {
 			struct ocelot_mact_entry entry;
 			bool is_static;
diff --git a/drivers/net/ethernet/mscc/ocelot_regs.c b/drivers/net/ethernet/mscc/ocelot_regs.c
index 69d97cbe25d6..2be74b275685 100644
--- a/drivers/net/ethernet/mscc/ocelot_regs.c
+++ b/drivers/net/ethernet/mscc/ocelot_regs.c
@@ -436,6 +436,7 @@ int ocelot_chip_init(struct ocelot *ocelot, const struct ocelot_ops *ops)
 	ocelot->stats_layout = ocelot_stats_layout;
 	ocelot->num_stats = ARRAY_SIZE(ocelot_stats_layout);
 	ocelot->shared_queue_sz = 224 * 1024;
+	ocelot->num_mact_rows = 1024;
 	ocelot->ops = ops;
 
 	ret = ocelot_regfields_init(ocelot, ocelot_regfields);
diff --git a/include/soc/mscc/ocelot.h b/include/soc/mscc/ocelot.h
index 8a9180b882fc..06e67f60e5f7 100644
--- a/include/soc/mscc/ocelot.h
+++ b/include/soc/mscc/ocelot.h
@@ -513,6 +513,7 @@ struct ocelot {
 	unsigned int			num_stats;
 
 	int				shared_queue_sz;
+	int				num_mact_rows;
 
 	struct net_device		*hw_bridge_dev;
 	u16				bridge_mask;
-- 
2.17.1