diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 8639f32ec4d5..9eb3ac7669f7 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -195,6 +195,10 @@ struct mlxsw_sp_ptp_ops {
 			  u64 *data, int data_index);
 };
 
+struct mlxsw_sp_span_ops {
+	u32 (*buffsize_get)(int mtu, u32 speed);
+};
+
 static int mlxsw_sp_component_query(struct mlxfw_dev *mlxfw_dev,
 				    u16 component_index, u32 *p_max_size,
 				    u8 *p_align_bits, u16 *p_max_write_size)
@@ -3535,6 +3539,27 @@ mlxsw_sp_port_speed_by_width_set(struct mlxsw_sp_port *mlxsw_sp_port)
 	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
 }
 
+int mlxsw_sp_port_speed_get(struct mlxsw_sp_port *mlxsw_sp_port, u32 *speed)
+{
+	const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops;
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	char ptys_pl[MLXSW_REG_PTYS_LEN];
+	u32 eth_proto_oper;
+	int err;
+
+	port_type_speed_ops = mlxsw_sp->port_type_speed_ops;
+	port_type_speed_ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl,
+					       mlxsw_sp_port->local_port, 0,
+					       false);
+	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
+	if (err)
+		return err;
+	port_type_speed_ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, NULL, NULL,
+						 &eth_proto_oper);
+	*speed = port_type_speed_ops->from_ptys_speed(mlxsw_sp, eth_proto_oper);
+	return 0;
+}
+
 int mlxsw_sp_port_ets_set(struct mlxsw_sp_port *mlxsw_sp_port,
 			  enum mlxsw_reg_qeec_hr hr, u8 index, u8 next_index,
 			  bool dwrr, u8 dwrr_weight)
@@ -3883,6 +3908,8 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port,
 
 	INIT_DELAYED_WORK(&mlxsw_sp_port->ptp.shaper_dw,
 			  mlxsw_sp->ptp_ops->shaper_work);
+	INIT_DELAYED_WORK(&mlxsw_sp_port->span.speed_update_dw,
+			  mlxsw_sp_span_speed_update_work);
 
 	mlxsw_sp->ports[local_port] = mlxsw_sp_port;
 	err = register_netdev(dev);
@@ -3939,6 +3966,7 @@ static void mlxsw_sp_port_remove(struct mlxsw_sp *mlxsw_sp, u8 local_port)
 	struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp->ports[local_port];
 
 	cancel_delayed_work_sync(&mlxsw_sp_port->periodic_hw_stats.update_dw);
+	cancel_delayed_work_sync(&mlxsw_sp_port->span.speed_update_dw);
 	cancel_delayed_work_sync(&mlxsw_sp_port->ptp.shaper_dw);
 	mlxsw_sp_port_ptp_clear(mlxsw_sp_port);
 	mlxsw_core_port_clear(mlxsw_sp->core, local_port, mlxsw_sp);
@@ -4346,6 +4374,7 @@ static void mlxsw_sp_pude_event_func(const struct mlxsw_reg_info *reg,
 		netdev_info(mlxsw_sp_port->dev, "link up\n");
 		netif_carrier_on(mlxsw_sp_port->dev);
 		mlxsw_core_schedule_dw(&mlxsw_sp_port->ptp.shaper_dw, 0);
+		mlxsw_core_schedule_dw(&mlxsw_sp_port->span.speed_update_dw, 0);
 	} else {
 		netdev_info(mlxsw_sp_port->dev, "link down\n");
 		netif_carrier_off(mlxsw_sp_port->dev);
@@ -4893,6 +4922,33 @@ static const struct mlxsw_sp_ptp_ops mlxsw_sp2_ptp_ops = {
 	.get_stats	= mlxsw_sp2_get_stats,
 };
 
+static u32 mlxsw_sp1_span_buffsize_get(int mtu, u32 speed)
+{
+	return mtu * 5 / 2;
+}
+
+static const struct mlxsw_sp_span_ops mlxsw_sp1_span_ops = {
+	.buffsize_get = mlxsw_sp1_span_buffsize_get,
+};
+
+#define MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR 38
+
+static u32 mlxsw_sp2_span_buffsize_get(int mtu, u32 speed)
+{
+	return 3 * mtu + MLXSW_SP2_SPAN_EG_MIRROR_BUFFER_FACTOR * speed / 1000;
+}
+
+static const struct mlxsw_sp_span_ops mlxsw_sp2_span_ops = {
+	.buffsize_get = mlxsw_sp2_span_buffsize_get,
+};
+
+u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu, u32 speed)
+{
+	u32 buffsize = mlxsw_sp->span_ops->buffsize_get(speed, mtu);
+
+	return mlxsw_sp_bytes_cells(mlxsw_sp, buffsize) + 1;
+}
+
 static int mlxsw_sp_netdevice_event(struct notifier_block *unused,
 				    unsigned long event, void *ptr);
 
@@ -5114,6 +5170,7 @@ static int mlxsw_sp1_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->sb_vals = &mlxsw_sp1_sb_vals;
 	mlxsw_sp->port_type_speed_ops = &mlxsw_sp1_port_type_speed_ops;
 	mlxsw_sp->ptp_ops = &mlxsw_sp1_ptp_ops;
+	mlxsw_sp->span_ops = &mlxsw_sp1_span_ops;
 	mlxsw_sp->listeners = mlxsw_sp1_listener;
 	mlxsw_sp->listeners_count = ARRAY_SIZE(mlxsw_sp1_listener);
 
@@ -5139,6 +5196,7 @@ static int mlxsw_sp2_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->sb_vals = &mlxsw_sp2_sb_vals;
 	mlxsw_sp->port_type_speed_ops = &mlxsw_sp2_port_type_speed_ops;
 	mlxsw_sp->ptp_ops = &mlxsw_sp2_ptp_ops;
+	mlxsw_sp->span_ops = &mlxsw_sp2_span_ops;
 
 	return mlxsw_sp_init(mlxsw_core, mlxsw_bus_info, extack);
 }
@@ -5160,6 +5218,7 @@ static int mlxsw_sp3_init(struct mlxsw_core *mlxsw_core,
 	mlxsw_sp->sb_vals = &mlxsw_sp2_sb_vals;
 	mlxsw_sp->port_type_speed_ops = &mlxsw_sp2_port_type_speed_ops;
 	mlxsw_sp->ptp_ops = &mlxsw_sp2_ptp_ops;
+	mlxsw_sp->span_ops = &mlxsw_sp2_span_ops;
 
 	return mlxsw_sp_init(mlxsw_core, mlxsw_bus_info, extack);
 }
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index 948ef4720d40..5f3b74360dc8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -140,6 +140,7 @@ struct mlxsw_sp_sb_vals;
 struct mlxsw_sp_port_type_speed_ops;
 struct mlxsw_sp_ptp_state;
 struct mlxsw_sp_ptp_ops;
+struct mlxsw_sp_span_ops;
 
 struct mlxsw_sp_port_mapping {
 	u8 module;
@@ -185,6 +186,7 @@ struct mlxsw_sp {
 	const struct mlxsw_sp_sb_vals *sb_vals;
 	const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops;
 	const struct mlxsw_sp_ptp_ops *ptp_ops;
+	const struct mlxsw_sp_span_ops *span_ops;
 	const struct mlxsw_listener *listeners;
 	size_t listeners_count;
 };
@@ -292,6 +294,9 @@ struct mlxsw_sp_port {
 		struct mlxsw_sp_ptp_port_stats stats;
 	} ptp;
 	u8 split_base_local_port;
+	struct {
+		struct delayed_work speed_update_dw;
+	} span;
 };
 
 struct mlxsw_sp_port_type_speed_ops {
@@ -471,6 +476,7 @@ extern struct notifier_block mlxsw_sp_switchdev_notifier;
 /* spectrum.c */
 void mlxsw_sp_rx_listener_no_mark_func(struct sk_buff *skb,
 				       u8 local_port, void *priv);
+int mlxsw_sp_port_speed_get(struct mlxsw_sp_port *mlxsw_sp_port, u32 *speed);
 int mlxsw_sp_port_ets_set(struct mlxsw_sp_port *mlxsw_sp_port,
 			  enum mlxsw_reg_qeec_hr hr, u8 index, u8 next_index,
 			  bool dwrr, u8 dwrr_weight);
@@ -501,6 +507,7 @@ int mlxsw_sp_flow_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 				unsigned int *p_counter_index);
 void mlxsw_sp_flow_counter_free(struct mlxsw_sp *mlxsw_sp,
 				unsigned int counter_index);
+u32 mlxsw_sp_span_buffsize_get(struct mlxsw_sp *mlxsw_sp, int mtu, u32 speed);
 bool mlxsw_sp_port_dev_check(const struct net_device *dev);
 struct mlxsw_sp *mlxsw_sp_lower_get(struct net_device *dev);
 struct mlxsw_sp_port *mlxsw_sp_port_dev_lower_find(struct net_device *dev);
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c
index 4aaaa4937b1a..34f7c3501b08 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c
@@ -1016,27 +1016,17 @@ mlxsw_sp1_ptp_port_shaper_set(struct mlxsw_sp_port *mlxsw_sp_port, bool enable)
 
 static int mlxsw_sp1_ptp_port_shaper_check(struct mlxsw_sp_port *mlxsw_sp_port)
 {
-	const struct mlxsw_sp_port_type_speed_ops *port_type_speed_ops;
-	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
-	char ptys_pl[MLXSW_REG_PTYS_LEN];
-	u32 eth_proto_oper, speed;
 	bool ptps = false;
 	int err, i;
+	u32 speed;
 
 	if (!mlxsw_sp1_ptp_hwtstamp_enabled(mlxsw_sp_port))
 		return mlxsw_sp1_ptp_port_shaper_set(mlxsw_sp_port, false);
 
-	port_type_speed_ops = mlxsw_sp->port_type_speed_ops;
-	port_type_speed_ops->reg_ptys_eth_pack(mlxsw_sp, ptys_pl,
-					       mlxsw_sp_port->local_port, 0,
-					       false);
-	err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(ptys), ptys_pl);
+	err = mlxsw_sp_port_speed_get(mlxsw_sp_port, &speed);
 	if (err)
 		return err;
-	port_type_speed_ops->reg_ptys_eth_unpack(mlxsw_sp, ptys_pl, NULL, NULL,
-						 &eth_proto_oper);
 
-	speed = port_type_speed_ops->from_ptys_speed(mlxsw_sp, eth_proto_oper);
 	for (i = 0; i < MLXSW_SP1_PTP_SHAPER_PARAMS_LEN; i++) {
 		if (mlxsw_sp1_ptp_shaper_params[i].ethtool_speed == speed) {
 			ptps = true;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 200d324e6d99..0cdd7954a085 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -748,35 +748,52 @@ static bool mlxsw_sp_span_is_egress_mirror(struct mlxsw_sp_port *port)
 	return false;
 }
 
-static int mlxsw_sp_span_mtu_to_buffsize(const struct mlxsw_sp *mlxsw_sp,
-					 int mtu)
+static int
+mlxsw_sp_span_port_buffsize_update(struct mlxsw_sp_port *mlxsw_sp_port, u16 mtu)
 {
-	return mlxsw_sp_bytes_cells(mlxsw_sp, mtu * 5 / 2) + 1;
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
+	char sbib_pl[MLXSW_REG_SBIB_LEN];
+	u32 buffsize;
+	u32 speed;
+	int err;
+
+	err = mlxsw_sp_port_speed_get(mlxsw_sp_port, &speed);
+	if (err)
+		return err;
+	if (speed == SPEED_UNKNOWN)
+		speed = 0;
+
+	buffsize = mlxsw_sp_span_buffsize_get(mlxsw_sp, speed, mtu);
+	mlxsw_reg_sbib_pack(sbib_pl, mlxsw_sp_port->local_port, buffsize);
+	return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
 }
 
 int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu)
 {
-	struct mlxsw_sp *mlxsw_sp = port->mlxsw_sp;
-	char sbib_pl[MLXSW_REG_SBIB_LEN];
-	int err;
-
 	/* If port is egress mirrored, the shared buffer size should be
 	 * updated according to the mtu value
 	 */
-	if (mlxsw_sp_span_is_egress_mirror(port)) {
-		u32 buffsize = mlxsw_sp_span_mtu_to_buffsize(mlxsw_sp, mtu);
-
-		mlxsw_reg_sbib_pack(sbib_pl, port->local_port, buffsize);
-		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
-		if (err) {
-			netdev_err(port->dev, "Could not update shared buffer for mirroring\n");
-			return err;
-		}
-	}
-
+	if (mlxsw_sp_span_is_egress_mirror(port))
+		return mlxsw_sp_span_port_buffsize_update(port, mtu);
 	return 0;
 }
 
+void mlxsw_sp_span_speed_update_work(struct work_struct *work)
+{
+	struct delayed_work *dwork = to_delayed_work(work);
+	struct mlxsw_sp_port *mlxsw_sp_port;
+
+	mlxsw_sp_port = container_of(dwork, struct mlxsw_sp_port,
+				     span.speed_update_dw);
+
+	/* If port is egress mirrored, the shared buffer size should be
+	 * updated according to the speed value.
+	 */
+	if (mlxsw_sp_span_is_egress_mirror(mlxsw_sp_port))
+		mlxsw_sp_span_port_buffsize_update(mlxsw_sp_port,
+						   mlxsw_sp_port->dev->mtu);
+}
+
 static struct mlxsw_sp_span_inspected_port *
 mlxsw_sp_span_entry_bound_port_find(struct mlxsw_sp_span_entry *span_entry,
 				    enum mlxsw_sp_span_type type,
@@ -836,15 +853,9 @@ mlxsw_sp_span_inspected_port_add(struct mlxsw_sp_port *port,
 
 	/* if it is an egress SPAN, bind a shared buffer to it */
 	if (type == MLXSW_SP_SPAN_EGRESS) {
-		u32 buffsize = mlxsw_sp_span_mtu_to_buffsize(mlxsw_sp,
-							     port->dev->mtu);
-
-		mlxsw_reg_sbib_pack(sbib_pl, port->local_port, buffsize);
-		err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(sbib), sbib_pl);
-		if (err) {
-			netdev_err(port->dev, "Could not create shared buffer for mirroring\n");
+		err = mlxsw_sp_span_port_buffsize_update(port, port->dev->mtu);
+		if (err)
 			return err;
-		}
 	}
 
 	if (bind) {
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
index 5e04252f2a11..59724335525f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.h
@@ -74,5 +74,6 @@ void mlxsw_sp_span_entry_invalidate(struct mlxsw_sp *mlxsw_sp,
 				    struct mlxsw_sp_span_entry *span_entry);
 
 int mlxsw_sp_span_port_mtu_update(struct mlxsw_sp_port *port, u16 mtu);
+void mlxsw_sp_span_speed_update_work(struct work_struct *work);
 
 #endif