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

Browse source 
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: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Mark Bloch 2021-08-03 16:19:47 -07:00 committed by Saeed Mahameed
parent 97a8a8c1f9
commit af8c0e25f2
3 changed files with 53 additions and 0 deletions
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49
drivers/net/ethernet/mellanox/mlx5/core/lag.c
View file

@ -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,

1
drivers/net/ethernet/mellanox/mlx5/core/lag.h
View file

@ -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];

3
include/linux/mlx5/driver.h
View file

@ -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,