net/mlx5e: Update ethtool setting of CQE compression

Remove restriction blocking configuration of CQE compression when PTP rx
filter is set. Instead turn on indication for RX PTP, and try to reopen
the channels.
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

drivers/net/ethernet/mellanox/mlx5/core/en.h

@@ -1023,6 +1023,7 @@ int mlx5e_num_channels_changed(struct mlx5e_priv *priv);
 int mlx5e_num_channels_changed_ctx(struct mlx5e_priv *priv, void *context);
 void mlx5e_activate_priv_channels(struct mlx5e_priv *priv);
 void mlx5e_deactivate_priv_channels(struct mlx5e_priv *priv);
+int mlx5e_ptp_rx_manage_fs_ctx(struct mlx5e_priv *priv, void *ctx);
 
 void mlx5e_build_default_indir_rqt(u32 *indirection_rqt, int len,
 				   int num_channels);

drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c

@@ -34,6 +34,7 @@
 #include "en/port.h"
 #include "en/params.h"
 #include "en/xsk/pool.h"
+#include "en/ptp.h"
 #include "lib/clock.h"
 
 void mlx5e_ethtool_get_drvinfo(struct mlx5e_priv *priv,
@@ -1865,13 +1866,19 @@ int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool new_val
 
 	new_channels.params = priv->channels.params;
 	MLX5E_SET_PFLAG(&new_channels.params, MLX5E_PFLAG_RX_CQE_COMPRESS, new_val);
+	if (priv->tstamp.rx_filter != HWTSTAMP_FILTER_NONE)
+		new_channels.params.ptp_rx = new_val;
 
 	if (!test_bit(MLX5E_STATE_OPENED, &priv->state)) {
 		priv->channels.params = new_channels.params;
 		return 0;
 	}
 
-	err = mlx5e_safe_switch_channels(priv, &new_channels, NULL, NULL);
+	if (new_channels.params.ptp_rx == priv->channels.params.ptp_rx)
+		err = mlx5e_safe_switch_channels(priv, &new_channels, NULL, NULL);
+	else
+		err = mlx5e_safe_switch_channels(priv, &new_channels, mlx5e_ptp_rx_manage_fs_ctx,
+						 &new_channels.params.ptp_rx);
 	if (err)
 		return err;
 
@@ -1892,11 +1899,6 @@ static int set_pflag_rx_cqe_compress(struct net_device *netdev,
 	if (!MLX5_CAP_GEN(mdev, cqe_compression))
 		return -EOPNOTSUPP;
 
-	if (enable && priv->tstamp.rx_filter != HWTSTAMP_FILTER_NONE) {
-		netdev_err(netdev, "Can't enable cqe compression while timestamping is enabled.\n");
-		return -EINVAL;
-	}
-
 	err = mlx5e_modify_rx_cqe_compression_locked(priv, enable);
 	if (err)
 		return err;

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

@@ -3970,7 +3970,7 @@ static int mlx5e_change_nic_mtu(struct net_device *netdev, int new_mtu)
 	return mlx5e_change_mtu(netdev, new_mtu, mlx5e_set_dev_port_mtu_ctx);
 }
 
-static int mlx5e_ptp_rx_manage_fs_ctx(struct mlx5e_priv *priv, void *ctx)
+int mlx5e_ptp_rx_manage_fs_ctx(struct mlx5e_priv *priv, void *ctx)
 {
 	bool set  = *(bool *)ctx;