[patch net-next v2 1/2] mlxsw: spectrum: pass local_port to mlxsw_sp_port_fdb_uc_op

[patch net-next v2 1/2] mlxsw: spectrum: pass local_port to mlxsw_sp_port_fdb_uc_op

[Jiri Pirko]

From: Jiri Pirko <jiri@mellanox.com>

Do not pass struct mlxsw_sp_port to mlxsw_sp_port_fdb_uc_op and rather
just pass local_port. This is needed in case this is called from SFN
process function and mlxsw_sp_port is not existent for particular
local_port.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
---
v1->v2:
- no change
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index 614ef57..5150e9e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -594,11 +594,10 @@ static enum mlxsw_reg_sfd_op mlxsw_sp_sfd_op(bool adding)
 			MLXSW_REG_SFD_OP_WRITE_REMOVE;
 }
 
-static int mlxsw_sp_port_fdb_uc_op(struct mlxsw_sp_port *mlxsw_sp_port,
+static int mlxsw_sp_port_fdb_uc_op(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 				   const char *mac, u16 fid, bool adding,
 				   bool dynamic)
 {
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 	char *sfd_pl;
 	int err;
 
@@ -609,7 +608,7 @@ static int mlxsw_sp_port_fdb_uc_op(struct mlxsw_sp_port *mlxsw_sp_port,
 	mlxsw_reg_sfd_pack(sfd_pl, mlxsw_sp_sfd_op(adding), 0);
 	mlxsw_reg_sfd_uc_pack(sfd_pl, 0, mlxsw_sp_sfd_rec_policy(dynamic),
 			      mac, fid, MLXSW_REG_SFD_REC_ACTION_NOP,
-			      mlxsw_sp_port->local_port);
+			      local_port);
 	err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sfd), sfd_pl);
 	kfree(sfd_pl);
 
@@ -659,7 +658,8 @@ mlxsw_sp_port_fdb_static_add(struct mlxsw_sp_port *mlxsw_sp_port,
 		fid = mlxsw_sp_port->pvid;
 
 	if (!mlxsw_sp_port->lagged)
-		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port,
+		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port->mlxsw_sp,
+					       mlxsw_sp_port->local_port,
 					       fdb->addr, fid, true, false);
 	else
 		return mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp_port->mlxsw_sp,
@@ -798,7 +798,8 @@ mlxsw_sp_port_fdb_static_del(struct mlxsw_sp_port *mlxsw_sp_port,
 	}
 
 	if (!mlxsw_sp_port->lagged)
-		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port,
+		return mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port->mlxsw_sp,
+					       mlxsw_sp_port->local_port,
 					       fdb->addr, fid,
 					       false, false);
 	else
@@ -1056,7 +1057,7 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 		vid = fid;
 	}
 
-	err = mlxsw_sp_port_fdb_uc_op(mlxsw_sp_port, mac, fid,
+	err = mlxsw_sp_port_fdb_uc_op(mlxsw_sp, local_port, mac, fid,
 				      adding && mlxsw_sp_port->learning, true);
 	if (err) {
 		if (net_ratelimit())
-- 
1.9.3

[patch net-next v2 2/2] mlxsw: spectrum: remove FDB entry in case we get unknown object notification

[Jiri Pirko]

From: Jiri Pirko <jiri@mellanox.com>

It may happen that we get notification for FDB entry for object (port,
lag, vport), which does not exist. Currently we ignore that, which only
causes this being re-sent in next notification. The entry will never
disappear. So get rid of it by simply removing it using SFD register.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
---
v1->v2:
- fixing impossible mlxsw_sp_port null dereference
---
 .../ethernet/mellanox/mlxsw/spectrum_switchdev.c   | 38 +++++++++++++++++-----
 1 file changed, 30 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index 5150e9e..d64559e 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -1030,13 +1030,14 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 	char mac[ETH_ALEN];
 	u8 local_port;
 	u16 vid, fid;
+	bool do_notification = true;
 	int err;
 
 	mlxsw_reg_sfn_mac_unpack(sfn_pl, rec_index, mac, &fid, &local_port);
 	mlxsw_sp_port = mlxsw_sp->ports[local_port];
 	if (!mlxsw_sp_port) {
 		dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Incorrect local port in FDB notification\n");
-		return;
+		goto just_remove;
 	}
 
 	if (mlxsw_sp_fid_is_vfid(fid)) {
@@ -1047,9 +1048,8 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 								  vfid);
 		if (!mlxsw_sp_vport) {
 			netdev_err(mlxsw_sp_port->dev, "Failed to find a matching vPort following FDB notification\n");
-			return;
+			goto just_remove;
 		}
-
 		vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
 		/* Override the physical port with the vPort. */
 		mlxsw_sp_port = mlxsw_sp_vport;
@@ -1057,17 +1057,28 @@ static void mlxsw_sp_fdb_notify_mac_process(struct mlxsw_sp *mlxsw_sp,
 		vid = fid;
 	}
 
+	adding = adding && mlxsw_sp_port->learning;
+
+do_fdb_op:
 	err = mlxsw_sp_port_fdb_uc_op(mlxsw_sp, local_port, mac, fid,
-				      adding && mlxsw_sp_port->learning, true);
+				      adding, true);
 	if (err) {
 		if (net_ratelimit())
 			netdev_err(mlxsw_sp_port->dev, "Failed to set FDB entry\n");
 		return;
 	}
 
+	if (!do_notification)
+		return;
 	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
 				    mlxsw_sp_port->learning_sync,
 				    adding, mac, vid, mlxsw_sp_port->dev);
+	return;
+
+just_remove:
+	adding = false;
+	do_notification = false;
+	goto do_fdb_op;
 }
 
 static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
@@ -1079,13 +1090,14 @@ static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
 	u16 lag_vid = 0;
 	u16 lag_id;
 	u16 vid, fid;
+	bool do_notification = true;
 	int err;
 
 	mlxsw_reg_sfn_mac_lag_unpack(sfn_pl, rec_index, mac, &fid, &lag_id);
 	mlxsw_sp_port = mlxsw_sp_lag_rep_port(mlxsw_sp, lag_id);
 	if (!mlxsw_sp_port) {
 		dev_err_ratelimited(mlxsw_sp->bus_info->dev, "Cannot find port representor for LAG\n");
-		return;
+		goto just_remove;
 	}
 
 	if (mlxsw_sp_fid_is_vfid(fid)) {
@@ -1096,7 +1108,7 @@ static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
 								  vfid);
 		if (!mlxsw_sp_vport) {
 			netdev_err(mlxsw_sp_port->dev, "Failed to find a matching vPort following FDB notification\n");
-			return;
+			goto just_remove;
 		}
 
 		vid = mlxsw_sp_vport_vid_get(mlxsw_sp_vport);
@@ -1107,19 +1119,29 @@ static void mlxsw_sp_fdb_notify_mac_lag_process(struct mlxsw_sp *mlxsw_sp,
 		vid = fid;
 	}
 
+	adding = adding && mlxsw_sp_port->learning;
+
+do_fdb_op:
 	err = mlxsw_sp_port_fdb_uc_lag_op(mlxsw_sp, lag_id, mac, fid, lag_vid,
-					  adding && mlxsw_sp_port->learning,
-					  true);
+					  adding, true);
 	if (err) {
 		if (net_ratelimit())
 			netdev_err(mlxsw_sp_port->dev, "Failed to set FDB entry\n");
 		return;
 	}
 
+	if (!do_notification)
+		return;
 	mlxsw_sp_fdb_call_notifiers(mlxsw_sp_port->learning,
 				    mlxsw_sp_port->learning_sync,
 				    adding, mac, vid,
 				    mlxsw_sp_lag_get(mlxsw_sp, lag_id)->dev);
+	return;
+
+just_remove:
+	adding = false;
+	do_notification = false;
+	goto do_fdb_op;
 }
 
 static void mlxsw_sp_fdb_notify_rec_process(struct mlxsw_sp *mlxsw_sp,
-- 
1.9.3

Re: [patch net-next v2 1/2] mlxsw: spectrum: pass local_port to mlxsw_sp_port_fdb_uc_op

[David Miller]

From: Jiri Pirko <jiri@resnulli.us>
Date: Thu,  7 Jan 2016 11:50:29 +0100

> From: Jiri Pirko <jiri@mellanox.com>
> 
> Do not pass struct mlxsw_sp_port to mlxsw_sp_port_fdb_uc_op and rather
> just pass local_port. This is needed in case this is called from SFN
> process function and mlxsw_sp_port is not existent for particular
> local_port.
> 
> Signed-off-by: Jiri Pirko <jiri@mellanox.com>
> Reviewed-by: Ido Schimmel <idosch@mellanox.com>
> ---
> v1->v2:
> - no change

Applied.

Re: [patch net-next v2 2/2] mlxsw: spectrum: remove FDB entry in case we get unknown object notification

[David Miller]

From: Jiri Pirko <jiri@resnulli.us>
Date: Thu,  7 Jan 2016 11:50:30 +0100

> From: Jiri Pirko <jiri@mellanox.com>
> 
> It may happen that we get notification for FDB entry for object (port,
> lag, vport), which does not exist. Currently we ignore that, which only
> causes this being re-sent in next notification. The entry will never
> disappear. So get rid of it by simply removing it using SFD register.
> 
> Signed-off-by: Jiri Pirko <jiri@mellanox.com>
> Reviewed-by: Ido Schimmel <idosch@mellanox.com>
> ---
> v1->v2:
> - fixing impossible mlxsw_sp_port null dereference

Applied.