net/mlx5e: Introduce the mlx5e_flush_rq function

Add a function to flush an RQ: clean up descriptors, release pages and
reset the RQ. This procedure is used by the recovery flow, and it will
also be used in a following commit to free some memory when switching a
channel to the XSK mode.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en.h b/drivers/net/ethernet/mellanox/mlx5/core/en.h
index 8e174a7..2383073 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en.h
@@ -1097,7 +1097,7 @@ 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);
 
-int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state);
+int mlx5e_flush_rq(struct mlx5e_rq *rq, int curr_state);
 void mlx5e_activate_rq(struct mlx5e_rq *rq);
 void mlx5e_deactivate_rq(struct mlx5e_rq *rq);
 void mlx5e_activate_icosq(struct mlx5e_icosq *icosq);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
index 2b946ae..5f6f95a 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
@@ -134,34 +134,13 @@ out:
        return err;
 }
 
-static int mlx5e_rq_to_ready(struct mlx5e_rq *rq, int curr_state)
-{
-       struct net_device *dev = rq->netdev;
-       int err;
-
-       err = mlx5e_modify_rq_state(rq, curr_state, MLX5_RQC_STATE_RST);
-       if (err) {
-               netdev_err(dev, "Failed to move rq 0x%x to reset\n", rq->rqn);
-               return err;
-       }
-       err = mlx5e_modify_rq_state(rq, MLX5_RQC_STATE_RST, MLX5_RQC_STATE_RDY);
-       if (err) {
-               netdev_err(dev, "Failed to move rq 0x%x to ready\n", rq->rqn);
-               return err;
-       }
-
-       return 0;
-}
-
 static int mlx5e_rx_reporter_err_rq_cqe_recover(void *ctx)
 {
        struct mlx5e_rq *rq = ctx;
        int err;
 
        mlx5e_deactivate_rq(rq);
-       mlx5e_free_rx_descs(rq);
-
-       err = mlx5e_rq_to_ready(rq, MLX5_RQC_STATE_ERR);
+       err = mlx5e_flush_rq(rq, MLX5_RQC_STATE_ERR);
        clear_bit(MLX5E_RQ_STATE_RECOVERING, &rq->state);
        if (err)
                return err;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 6a0adda..129a0d6 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -899,7 +899,7 @@ int mlx5e_create_rq(struct mlx5e_rq *rq, struct mlx5e_rq_param *param)
        return err;
 }
 
-int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state)
+static int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state)
 {
        struct mlx5_core_dev *mdev = rq->mdev;
 
@@ -928,6 +928,32 @@ int mlx5e_modify_rq_state(struct mlx5e_rq *rq, int curr_state, int next_state)
        return err;
 }
 
+static int mlx5e_rq_to_ready(struct mlx5e_rq *rq, int curr_state)
+{
+       struct net_device *dev = rq->netdev;
+       int err;
+
+       err = mlx5e_modify_rq_state(rq, curr_state, MLX5_RQC_STATE_RST);
+       if (err) {
+               netdev_err(dev, "Failed to move rq 0x%x to reset\n", rq->rqn);
+               return err;
+       }
+       err = mlx5e_modify_rq_state(rq, MLX5_RQC_STATE_RST, MLX5_RQC_STATE_RDY);
+       if (err) {
+               netdev_err(dev, "Failed to move rq 0x%x to ready\n", rq->rqn);
+               return err;
+       }
+
+       return 0;
+}
+
+int mlx5e_flush_rq(struct mlx5e_rq *rq, int curr_state)
+{
+       mlx5e_free_rx_descs(rq);
+
+       return mlx5e_rq_to_ready(rq, curr_state);
+}
+
 static int mlx5e_modify_rq_scatter_fcs(struct mlx5e_rq *rq, bool enable)
 {
        struct mlx5_core_dev *mdev = rq->mdev;