Commit af8c0e25 authored by Mark Bloch's avatar Mark Bloch Committed by Saeed Mahameed
Browse files

net/mlx5: Lag, add initial logic for shared FDB 



As shared FDB requires changes in two subsystems first expose the needed
core functions so the RDMA side can be changed.

mlx5_lag_is_master(): return true if a given mlx5 device is the lag master.
mlx5_lag_is_shared_fdb(): Returns true if the lag mode is shared FDB.
mlx5_lag_get_peer_mdev(): Return the peer mdev in lag.

The mentioned functions will be used by downstream patches in order
to add support for shared FDB for the RDMA side.

Signed-off-by: default avatarMark Bloch <mbloch@nvidia.com>
Reviewed-by: default avatarMark Zhang <markzhang@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent 97a8a8c1

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

+49 −0
Original line number Diff line number Diff line
@@ -746,6 +746,21 @@ bool mlx5_lag_is_active(struct mlx5_core_dev *dev) 
}

EXPORT_SYMBOL(mlx5_lag_is_active);



bool mlx5_lag_is_master(struct mlx5_core_dev *dev)

{

	struct mlx5_lag *ldev;

	bool res;



	spin_lock(&lag_lock);

	ldev = mlx5_lag_dev(dev);

	res = ldev && __mlx5_lag_is_active(ldev) &&

		dev == ldev->pf[MLX5_LAG_P1].dev;

	spin_unlock(&lag_lock);



	return res;

}

EXPORT_SYMBOL(mlx5_lag_is_master);



bool mlx5_lag_is_sriov(struct mlx5_core_dev *dev)

{

	struct mlx5_lag *ldev;
@@ -760,6 +775,20 @@ bool mlx5_lag_is_sriov(struct mlx5_core_dev *dev) 
}

EXPORT_SYMBOL(mlx5_lag_is_sriov);



bool mlx5_lag_is_shared_fdb(struct mlx5_core_dev *dev)

{

	struct mlx5_lag *ldev;

	bool res;



	spin_lock(&lag_lock);

	ldev = mlx5_lag_dev(dev);

	res = ldev && __mlx5_lag_is_sriov(ldev) && ldev->shared_fdb;

	spin_unlock(&lag_lock);



	return res;

}

EXPORT_SYMBOL(mlx5_lag_is_shared_fdb);



void mlx5_lag_update(struct mlx5_core_dev *dev)

{

	struct mlx5_lag *ldev;
@@ -827,6 +856,26 @@ u8 mlx5_lag_get_slave_port(struct mlx5_core_dev *dev, 
}

EXPORT_SYMBOL(mlx5_lag_get_slave_port);



struct mlx5_core_dev *mlx5_lag_get_peer_mdev(struct mlx5_core_dev *dev)

{

	struct mlx5_core_dev *peer_dev = NULL;

	struct mlx5_lag *ldev;



	spin_lock(&lag_lock);

	ldev = mlx5_lag_dev(dev);

	if (!ldev)

		goto unlock;



	peer_dev = ldev->pf[MLX5_LAG_P1].dev == dev ?

			   ldev->pf[MLX5_LAG_P2].dev :

			   ldev->pf[MLX5_LAG_P1].dev;



unlock:

	spin_unlock(&lag_lock);

	return peer_dev;

}

EXPORT_SYMBOL(mlx5_lag_get_peer_mdev);



int mlx5_lag_query_cong_counters(struct mlx5_core_dev *dev,

				 u64 *values,

				 int num_counters,

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

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ struct lag_tracker { 
 */

struct mlx5_lag {

	u8                        flags;

	bool			  shared_fdb;

	u8                        v2p_map[MLX5_MAX_PORTS];

	struct kref               ref;

	struct lag_func           pf[MLX5_MAX_PORTS];

include/linux/mlx5/driver.h

+3 −0
Original line number Diff line number Diff line
@@ -1138,6 +1138,8 @@ bool mlx5_lag_is_roce(struct mlx5_core_dev *dev); 
bool mlx5_lag_is_sriov(struct mlx5_core_dev *dev);

bool mlx5_lag_is_multipath(struct mlx5_core_dev *dev);

bool mlx5_lag_is_active(struct mlx5_core_dev *dev);

bool mlx5_lag_is_master(struct mlx5_core_dev *dev);

bool mlx5_lag_is_shared_fdb(struct mlx5_core_dev *dev);

struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev);

u8 mlx5_lag_get_slave_port(struct mlx5_core_dev *dev,

			   struct net_device *slave);
@@ -1145,6 +1147,7 @@ int mlx5_lag_query_cong_counters(struct mlx5_core_dev *dev, 
				 u64 *values,

				 int num_counters,

				 size_t *offsets);

struct mlx5_core_dev *mlx5_lag_get_peer_mdev(struct mlx5_core_dev *dev);

struct mlx5_uars_page *mlx5_get_uars_page(struct mlx5_core_dev *mdev);

void mlx5_put_uars_page(struct mlx5_core_dev *mdev, struct mlx5_uars_page *up);

int mlx5_dm_sw_icm_alloc(struct mlx5_core_dev *dev, enum mlx5_sw_icm_type type,