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net/mlx5e: Add LAG warning if bond slave is not lag master

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LAG offload can't be enabled if the enslaved PF is not lag master,
which is indicated by HCA capabilities bit. It is cleared if more than
64 VFs are configured for this PF.

Previously, a data structure is created to store lag info, including
PFs to be enslaved, then a handler is registered for netdev notifier.
However, this initialization is skipped if PF is not lag master. So
PF can't handle CHANGEUPPER event from upper bond device. Even worse,
PF is enslaved silently, and LAG offload is not activated.

Fix this by registering netdev notifier for PFs which are not lag
masters. When CHANGEUPPER event is received, and both physical ports
(and only them) on the same NIC are about to be enslaved, a warning is
returned for user to know it.

Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Raed Salem <raeds@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Raed Salem <raeds@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Jianbo Liu 2020-04-17 08:53:16 +00:00 committed by Saeed Mahameed
parent 1a3c911483
commit 9b412cc35f
3 changed files with 41 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/net/ethernet/mellanox/mlx5/core/lag.c
View File

@ -271,7 +271,7 @@ static void mlx5_do_bond(struct mlx5_lag *ldev)
bool do_bond, roce_lag;
int err;
if (!dev0 || !dev1)
if (!mlx5_lag_is_ready(ldev))
return;
spin_lock(&lag_lock);
@ -394,6 +394,12 @@ static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev,
*/
is_in_lag = num_slaves == MLX5_MAX_PORTS && bond_status == 0x3;
if (!mlx5_lag_is_ready(ldev) && is_in_lag) {
NL_SET_ERR_MSG_MOD(info->info.extack,
"Can't activate LAG offload, PF is configured with more than 64 VFs");
return 0;
}
/* Lag mode must be activebackup or hash. */
mode_supported = tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP ||
tracker->tx_type == NETDEV_LAG_TX_TYPE_HASH;
@ -450,6 +456,10 @@ static int mlx5_lag_netdev_event(struct notifier_block *this,
return NOTIFY_DONE;
ldev = container_of(this, struct mlx5_lag, nb);
if (!mlx5_lag_is_ready(ldev) && event == NETDEV_CHANGELOWERSTATE)
return NOTIFY_DONE;
tracker = ldev->tracker;
switch (event) {
@ -498,14 +508,14 @@ static void mlx5_lag_dev_free(struct mlx5_lag *ldev)
kfree(ldev);
}
static void mlx5_lag_dev_add_pf(struct mlx5_lag *ldev,
static int mlx5_lag_dev_add_pf(struct mlx5_lag *ldev,
struct mlx5_core_dev *dev,
struct net_device *netdev)
{
unsigned int fn = PCI_FUNC(dev->pdev->devfn);
if (fn >= MLX5_MAX_PORTS)
return;
return -EPERM;
spin_lock(&lag_lock);
ldev->pf[fn].dev = dev;
@ -516,6 +526,8 @@ static void mlx5_lag_dev_add_pf(struct mlx5_lag *ldev,
dev->priv.lag = ldev;
spin_unlock(&lag_lock);
return fn;
}
static void mlx5_lag_dev_remove_pf(struct mlx5_lag *ldev,
@ -542,11 +554,9 @@ void mlx5_lag_add(struct mlx5_core_dev *dev, struct net_device *netdev)
{
struct mlx5_lag *ldev = NULL;
struct mlx5_core_dev *tmp_dev;
int err;
int i, err;
if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
!MLX5_CAP_GEN(dev, lag_master) ||
(MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_MAX_PORTS))
if (!MLX5_CAP_GEN(dev, vport_group_manager))
return;
tmp_dev = mlx5_get_next_phys_dev(dev);
@ -561,7 +571,18 @@ void mlx5_lag_add(struct mlx5_core_dev *dev, struct net_device *netdev)
}
}
mlx5_lag_dev_add_pf(ldev, dev, netdev);
if (mlx5_lag_dev_add_pf(ldev, dev, netdev) < 0)
return;
for (i = 0; i < MLX5_MAX_PORTS; i++) {
tmp_dev = ldev->pf[i].dev;
if (!tmp_dev || !MLX5_CAP_GEN(tmp_dev, lag_master) ||
MLX5_CAP_GEN(tmp_dev, num_lag_ports) != MLX5_MAX_PORTS)
break;
}
if (i >= MLX5_MAX_PORTS)
ldev->flags |= MLX5_LAG_FLAG_READY;
if (!ldev->nb.notifier_call) {
ldev->nb.notifier_call = mlx5_lag_netdev_event;
@ -592,6 +613,8 @@ void mlx5_lag_remove(struct mlx5_core_dev *dev)
mlx5_lag_dev_remove_pf(ldev, dev);
ldev->flags &= ~MLX5_LAG_FLAG_READY;
for (i = 0; i < MLX5_MAX_PORTS; i++)
if (ldev->pf[i].dev)
break;

7
drivers/net/ethernet/mellanox/mlx5/core/lag.h
View File

@ -16,6 +16,7 @@ enum {
MLX5_LAG_FLAG_ROCE = 1 << 0,
MLX5_LAG_FLAG_SRIOV = 1 << 1,
MLX5_LAG_FLAG_MULTIPATH = 1 << 2,
MLX5_LAG_FLAG_READY = 1 << 3,
};
#define MLX5_LAG_MODE_FLAGS (MLX5_LAG_FLAG_ROCE | MLX5_LAG_FLAG_SRIOV |\
@ -59,6 +60,12 @@ __mlx5_lag_is_active(struct mlx5_lag *ldev)
return !!(ldev->flags & MLX5_LAG_MODE_FLAGS);
}
static inline bool
mlx5_lag_is_ready(struct mlx5_lag *ldev)
{
return ldev->flags & MLX5_LAG_FLAG_READY;
}
void mlx5_modify_lag(struct mlx5_lag *ldev,
struct lag_tracker *tracker);
int mlx5_activate_lag(struct mlx5_lag *ldev,

2
drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c
View File

@ -11,7 +11,7 @@
static bool mlx5_lag_multipath_check_prereq(struct mlx5_lag *ldev)
{
if (!ldev->pf[MLX5_LAG_P1].dev || !ldev->pf[MLX5_LAG_P2].dev)
if (!mlx5_lag_is_ready(ldev))
return false;
return mlx5_esw_multipath_prereq(ldev->pf[MLX5_LAG_P1].dev,