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net/mlx5: MPFS, add support for dynamic enable/disable

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MPFS (Multi PF Switch) is enabled by default in Multi-Host environments,
the driver keeps a list of desired unicast mac addresses of all vports
(vfs/Sfs) and applied to HW via L2_table FW command.

Add API to dynamically apply the list of MACs to HW when needed for next
patches, to utilize this new API in devlink eswitch active/in-active uAPI.

Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Adithya Jayachandran <ajayachandra@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20251108070404.1551708-3-saeed@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Saeed Mahameed
2025-11-07 23:04:03 -08:00
committed by Paolo Abeni
parent 0e535824d0
commit 9902b6381d
2 changed files with 108 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

116
drivers/net/ethernet/mellanox/mlx5/core/lib/mpfs.c
View File

@@ -65,13 +65,14 @@ static int del_l2table_entry_cmd(struct mlx5_core_dev *dev, u32 index)
/* UC L2 table hash node */
struct l2table_node {
struct l2addr_node node;
u32 index; /* index in HW l2 table */
int index; /* index in HW l2 table */
int ref_count;
};
struct mlx5_mpfs {
struct hlist_head hash[MLX5_L2_ADDR_HASH_SIZE];
struct mutex lock; /* Synchronize l2 table access */
bool enabled;
u32 size;
unsigned long *bitmap;
};
@@ -114,6 +115,8 @@ int mlx5_mpfs_init(struct mlx5_core_dev *dev)
return -ENOMEM;
}
mpfs->enabled = true;
dev->priv.mpfs = mpfs;
return 0;
}
@@ -135,7 +138,7 @@ int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac)
struct mlx5_mpfs *mpfs = dev->priv.mpfs;
struct l2table_node *l2addr;
int err = 0;
u32 index;
int index;
if (!mpfs)
return 0;
@@ -148,30 +151,34 @@ int mlx5_mpfs_add_mac(struct mlx5_core_dev *dev, u8 *mac)
goto out;
}
err = alloc_l2table_index(mpfs, &index);
if (err)
goto out;
l2addr = l2addr_hash_add(mpfs->hash, mac, struct l2table_node, GFP_KERNEL);
if (!l2addr) {
err = -ENOMEM;
goto hash_add_err;
goto out;
}
err = set_l2table_entry_cmd(dev, index, mac);
if (err)
goto set_table_entry_err;
index = -1;
if (mpfs->enabled) {
err = alloc_l2table_index(mpfs, &index);
if (err)
goto hash_del;
err = set_l2table_entry_cmd(dev, index, mac);
if (err)
goto free_l2table_index;
mlx5_core_dbg(dev, "MPFS entry %pM, set @index (%d)\n",
l2addr->node.addr, l2addr->index);
}
l2addr->index = index;
l2addr->ref_count = 1;
mlx5_core_dbg(dev, "MPFS mac added %pM, index (%d)\n", mac, index);
goto out;
set_table_entry_err:
l2addr_hash_del(l2addr);
hash_add_err:
free_l2table_index:
free_l2table_index(mpfs, index);
hash_del:
l2addr_hash_del(l2addr);
out:
mutex_unlock(&mpfs->lock);
return err;
@@ -183,7 +190,7 @@ int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac)
struct mlx5_mpfs *mpfs = dev->priv.mpfs;
struct l2table_node *l2addr;
int err = 0;
u32 index;
int index;
if (!mpfs)
return 0;
@@ -200,12 +207,87 @@ int mlx5_mpfs_del_mac(struct mlx5_core_dev *dev, u8 *mac)
goto unlock;
index = l2addr->index;
del_l2table_entry_cmd(dev, index);
if (index >= 0) {
del_l2table_entry_cmd(dev, index);
free_l2table_index(mpfs, index);
mlx5_core_dbg(dev, "MPFS entry %pM, deleted @index (%d)\n",
mac, index);
}
l2addr_hash_del(l2addr);
free_l2table_index(mpfs, index);
mlx5_core_dbg(dev, "MPFS mac deleted %pM, index (%d)\n", mac, index);
unlock:
mutex_unlock(&mpfs->lock);
return err;
}
EXPORT_SYMBOL(mlx5_mpfs_del_mac);
int mlx5_mpfs_enable(struct mlx5_core_dev *dev)
{
struct mlx5_mpfs *mpfs = dev->priv.mpfs;
struct l2table_node *l2addr;
struct hlist_node *n;
int err = 0, i;
if (!mpfs)
return -ENODEV;
mutex_lock(&mpfs->lock);
if (mpfs->enabled)
goto out;
mpfs->enabled = true;
mlx5_core_dbg(dev, "MPFS enabling mpfs\n");
mlx5_mpfs_foreach(l2addr, n, mpfs, i) {
u32 index;
err = alloc_l2table_index(mpfs, &index);
if (err) {
mlx5_core_err(dev, "Failed to allocated MPFS index for %pM, err(%d)\n",
l2addr->node.addr, err);
goto out;
}
err = set_l2table_entry_cmd(dev, index, l2addr->node.addr);
if (err) {
mlx5_core_err(dev, "Failed to set MPFS l2table entry for %pM index=%d, err(%d)\n",
l2addr->node.addr, index, err);
free_l2table_index(mpfs, index);
goto out;
}
l2addr->index = index;
mlx5_core_dbg(dev, "MPFS entry %pM, set @index (%d)\n",
l2addr->node.addr, l2addr->index);
}
out:
mutex_unlock(&mpfs->lock);
return err;
}
void mlx5_mpfs_disable(struct mlx5_core_dev *dev)
{
struct mlx5_mpfs *mpfs = dev->priv.mpfs;
struct l2table_node *l2addr;
struct hlist_node *n;
int i;
if (!mpfs)
return;
mutex_lock(&mpfs->lock);
if (!mpfs->enabled)
goto unlock;
mlx5_mpfs_foreach(l2addr, n, mpfs, i) {
if (l2addr->index < 0)
continue;
del_l2table_entry_cmd(dev, l2addr->index);
free_l2table_index(mpfs, l2addr->index);
mlx5_core_dbg(dev, "MPFS entry %pM, deleted @index (%d)\n",
l2addr->node.addr, l2addr->index);
l2addr->index = -1;
}
mpfs->enabled = false;
mlx5_core_dbg(dev, "MPFS disabled\n");
unlock:
mutex_unlock(&mpfs->lock);
}

9
drivers/net/ethernet/mellanox/mlx5/core/lib/mpfs.h
View File

@@ -45,6 +45,10 @@ struct l2addr_node {
u8 addr[ETH_ALEN];
};
#define mlx5_mpfs_foreach(hs, tmp, mpfs, i) \
for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
hlist_for_each_entry_safe(hs, tmp, &(mpfs)->hash[i], node.hlist)
#define for_each_l2hash_node(hn, tmp, hash, i) \
for (i = 0; i < MLX5_L2_ADDR_HASH_SIZE; i++) \
hlist_for_each_entry_safe(hn, tmp, &(hash)[i], hlist)
@@ -82,11 +86,16 @@ struct l2addr_node {
})
#ifdef CONFIG_MLX5_MPFS
struct mlx5_core_dev;
int mlx5_mpfs_init(struct mlx5_core_dev *dev);
void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev);
int mlx5_mpfs_enable(struct mlx5_core_dev *dev);
void mlx5_mpfs_disable(struct mlx5_core_dev *dev);
#else /* #ifndef CONFIG_MLX5_MPFS */
static inline int mlx5_mpfs_init(struct mlx5_core_dev *dev) { return 0; }
static inline void mlx5_mpfs_cleanup(struct mlx5_core_dev *dev) {}
static inline int mlx5_mpfs_enable(struct mlx5_core_dev *dev) { return 0; }
static inline void mlx5_mpfs_disable(struct mlx5_core_dev *dev) {}
#endif
#endif