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mlxsw: spectrum_acl: Don't take rtnl lock during vregion_rehash_intrvl_set()

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Relax dependency on rtnl mutex during vregion_rehash_intrvl_set(). The
vregion list is protected with newly introduced mutex.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2019-02-24 06:46:29 +00:00 committed by David S. Miller
parent ddaa2875da
commit 7b0f62eefc
2 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
View File

@ -38,6 +38,7 @@ int mlxsw_sp_acl_tcam_init(struct mlxsw_sp *mlxsw_sp,
size_t alloc_size;
int err;
mutex_init(&tcam->lock);
tcam->vregion_rehash_intrvl =
MLXSW_SP_ACL_TCAM_VREGION_REHASH_INTRVL_DFLT;
INIT_LIST_HEAD(&tcam->vregion_list);
@ -85,6 +86,7 @@ void mlxsw_sp_acl_tcam_fini(struct mlxsw_sp *mlxsw_sp,
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
mutex_destroy(&tcam->lock);
ops->fini(mlxsw_sp, tcam->priv);
kfree(tcam->used_groups);
kfree(tcam->used_regions);
@ -784,7 +786,9 @@ mlxsw_sp_acl_tcam_vregion_create(struct mlxsw_sp *mlxsw_sp,
INIT_DELAYED_WORK(&vregion->rehash_dw,
mlxsw_sp_acl_tcam_vregion_rehash_work);
mlxsw_sp_acl_tcam_vregion_rehash_work_schedule(vregion);
mutex_lock(&tcam->lock);
list_add_tail(&vregion->tlist, &tcam->vregion_list);
mutex_unlock(&tcam->lock);
}
return vregion;
@ -804,9 +808,12 @@ mlxsw_sp_acl_tcam_vregion_destroy(struct mlxsw_sp *mlxsw_sp,
{
const struct mlxsw_sp_acl_tcam_ops *ops = mlxsw_sp->acl_tcam_ops;
struct mlxsw_sp_acl_tcam_vgroup *vgroup = vregion->vgroup;
struct mlxsw_sp_acl_tcam *tcam = vregion->tcam;
if (vgroup->vregion_rehash_enabled && ops->region_rehash_hints_get) {
mutex_lock(&tcam->lock);
list_del(&vregion->tlist);
mutex_unlock(&tcam->lock);
cancel_delayed_work_sync(&vregion->rehash_dw);
}
mlxsw_sp_acl_tcam_vgroup_vregion_detach(mlxsw_sp, vregion);
@ -842,14 +849,14 @@ int mlxsw_sp_acl_tcam_vregion_rehash_intrvl_set(struct mlxsw_sp *mlxsw_sp,
if (WARN_ON(!ops->region_rehash_hints_get))
return -EOPNOTSUPP;
tcam->vregion_rehash_intrvl = val;
rtnl_lock();
mutex_lock(&tcam->lock);
list_for_each_entry(vregion, &tcam->vregion_list, tlist) {
if (val)
mlxsw_core_schedule_dw(&vregion->rehash_dw, 0);
else
cancel_delayed_work_sync(&vregion->rehash_dw);
}
rtnl_unlock();
mutex_unlock(&tcam->lock);
return 0;
}

1
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.h
View File

@ -17,6 +17,7 @@ struct mlxsw_sp_acl_tcam {
unsigned long *used_groups; /* bit array */
unsigned int max_groups;
unsigned int max_group_size;
struct mutex lock; /* guards vregion list */
struct list_head vregion_list;
u32 vregion_rehash_intrvl; /* ms */
unsigned long priv[0];