From: Mark Bloch <mbloch@nvidia.com>
Date: Sun, 27 Feb 2022 12:40:39 +0000 (+0000)
Subject: net/mlx5: Lag, filter non compatible devices
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=bc4c2f2e0179;p=linux.git
net/mlx5: Lag, filter non compatible devices
When search for a peer lag device we can filter based on that
device's capabilities.
Downstream patch will be less strict when filtering compatible devices
and remove the limitation where we require exact MLX5_MAX_PORTS and
change it to a range.
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/dev.c b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
index ba6dad97e308d..3e750b827a19e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/dev.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/dev.c
@@ -555,12 +555,9 @@ static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
PCI_SLOT(dev->pdev->devfn));
}
-static int next_phys_dev(struct device *dev, const void *data)
+static int _next_phys_dev(struct mlx5_core_dev *mdev,
+ const struct mlx5_core_dev *curr)
{
- struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev);
- struct mlx5_core_dev *mdev = madev->mdev;
- const struct mlx5_core_dev *curr = data;
-
if (!mlx5_core_is_pf(mdev))
return 0;
@@ -574,8 +571,29 @@ static int next_phys_dev(struct device *dev, const void *data)
return 1;
}
-/* Must be called with intf_mutex held */
-struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
+static int next_phys_dev(struct device *dev, const void *data)
+{
+ struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev);
+ struct mlx5_core_dev *mdev = madev->mdev;
+
+ return _next_phys_dev(mdev, data);
+}
+
+static int next_phys_dev_lag(struct device *dev, const void *data)
+{
+ struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev);
+ struct mlx5_core_dev *mdev = madev->mdev;
+
+ if (!MLX5_CAP_GEN(mdev, vport_group_manager) ||
+ !MLX5_CAP_GEN(mdev, lag_master) ||
+ MLX5_CAP_GEN(mdev, num_lag_ports) != MLX5_MAX_PORTS)
+ return 0;
+
+ return _next_phys_dev(mdev, data);
+}
+
+static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev,
+ int (*match)(struct device *dev, const void *data))
{
struct auxiliary_device *adev;
struct mlx5_adev *madev;
@@ -583,7 +601,7 @@ struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
if (!mlx5_core_is_pf(dev))
return NULL;
- adev = auxiliary_find_device(NULL, dev, &next_phys_dev);
+ adev = auxiliary_find_device(NULL, dev, match);
if (!adev)
return NULL;
@@ -592,6 +610,20 @@ struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
return madev->mdev;
}
+/* Must be called with intf_mutex held */
+struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
+{
+ lockdep_assert_held(&mlx5_intf_mutex);
+ return mlx5_get_next_dev(dev, &next_phys_dev);
+}
+
+/* Must be called with intf_mutex held */
+struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev)
+{
+ lockdep_assert_held(&mlx5_intf_mutex);
+ return mlx5_get_next_dev(dev, &next_phys_dev_lag);
+}
+
void mlx5_dev_list_lock(void)
{
mutex_lock(&mlx5_intf_mutex);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index fc32f3e05191a..360cb1c4221ea 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -913,12 +913,7 @@ static int __mlx5_lag_dev_add_mdev(struct mlx5_core_dev *dev)
struct mlx5_lag *ldev = NULL;
struct mlx5_core_dev *tmp_dev;
- if (!MLX5_CAP_GEN(dev, vport_group_manager) ||
- !MLX5_CAP_GEN(dev, lag_master) ||
- MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_MAX_PORTS)
- return 0;
-
- tmp_dev = mlx5_get_next_phys_dev(dev);
+ tmp_dev = mlx5_get_next_phys_dev_lag(dev);
if (tmp_dev)
ldev = tmp_dev->priv.lag;
@@ -968,6 +963,11 @@ void mlx5_lag_add_mdev(struct mlx5_core_dev *dev)
{
int 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)
+ return;
+
recheck:
mlx5_dev_list_lock();
err = __mlx5_lag_dev_add_mdev(dev);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
index 9026be1d62232..484cb1e4fc7f6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/mlx5_core.h
@@ -210,6 +210,7 @@ void mlx5_detach_device(struct mlx5_core_dev *dev);
int mlx5_register_device(struct mlx5_core_dev *dev);
void mlx5_unregister_device(struct mlx5_core_dev *dev);
struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev);
+struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev);
void mlx5_dev_list_lock(void);
void mlx5_dev_list_unlock(void);
int mlx5_dev_list_trylock(void);