From: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Currently, steering object is protected by mutex lock, replace
the mutex lock with reader/writer semaphore .
In this patch we still use only write semaphore. In downstream
patches we will switch part of the write locks to read locks.
Signed-off-by: Maor Gottlieb <maorg@xxxxxxxxxxxx>
Signed-off-by: Saeed Mahameed <saeedm@xxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c | 28 +++++++++++------------
drivers/net/ethernet/mellanox/mlx5/core/fs_core.h | 2 +-
2 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index 41f26f4..9406e72 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -145,10 +145,10 @@ struct node_caps {
}
};
-enum fs_i_mutex_lock_class {
- FS_MUTEX_GRANDPARENT,
- FS_MUTEX_PARENT,
- FS_MUTEX_CHILD
+enum fs_i_lock_class {
+ FS_LOCK_GRANDPARENT,
+ FS_LOCK_PARENT,
+ FS_LOCK_CHILD
};
static const struct rhashtable_params rhash_fte = {
@@ -184,7 +184,7 @@ static void tree_init_node(struct fs_node *node,
atomic_set(&node->refcount, 1);
INIT_LIST_HEAD(&node->list);
INIT_LIST_HEAD(&node->children);
- mutex_init(&node->lock);
+ init_rwsem(&node->lock);
node->remove_func = remove_func;
node->active = false;
}
@@ -208,10 +208,10 @@ static void tree_get_node(struct fs_node *node)
}
static void nested_lock_ref_node(struct fs_node *node,
- enum fs_i_mutex_lock_class class)
+ enum fs_i_lock_class class)
{
if (node) {
- mutex_lock_nested(&node->lock, class);
+ down_write_nested(&node->lock, class);
atomic_inc(&node->refcount);
}
}
@@ -219,7 +219,7 @@ static void nested_lock_ref_node(struct fs_node *node,
static void lock_ref_node(struct fs_node *node)
{
if (node) {
- mutex_lock(&node->lock);
+ down_write(&node->lock);
atomic_inc(&node->refcount);
}
}
@@ -228,7 +228,7 @@ static void unlock_ref_node(struct fs_node *node)
{
if (node) {
atomic_dec(&node->refcount);
- mutex_unlock(&node->lock);
+ up_write(&node->lock);
}
}
@@ -1376,7 +1376,7 @@ static struct mlx5_flow_handle *add_rule_fg(struct mlx5_flow_group *fg,
int old_action;
int ret;
- nested_lock_ref_node(&fte->node, FS_MUTEX_CHILD);
+ nested_lock_ref_node(&fte->node, FS_LOCK_CHILD);
ret = check_conflicting_ftes(fte, flow_act);
if (ret) {
handle = ERR_PTR(ret);
@@ -1400,7 +1400,7 @@ static struct mlx5_flow_handle *add_rule_fg(struct mlx5_flow_group *fg,
fte = alloc_insert_fte(fg, match_value, flow_act);
if (IS_ERR(fte))
return (void *)fte;
- nested_lock_ref_node(&fte->node, FS_MUTEX_CHILD);
+ nested_lock_ref_node(&fte->node, FS_LOCK_CHILD);
handle = add_rule_fte(fte, fg, dest, dest_num, false);
if (IS_ERR(handle)) {
unlock_ref_node(&fte->node);
@@ -1548,7 +1548,7 @@ static int build_match_list(struct match_list_head *match_head,
struct fs_fte *fte;
g = iter->g;
- nested_lock_ref_node(&g->node, FS_MUTEX_PARENT);
+ nested_lock_ref_node(&g->node, FS_LOCK_PARENT);
fte = rhashtable_lookup_fast(&g->ftes_hash, spec->match_value,
rhash_fte);
if (fte) {
@@ -1566,7 +1566,7 @@ static int build_match_list(struct match_list_head *match_head,
list_for_each_entry(iter, &match_head.list, list) {
g = iter->g;
- nested_lock_ref_node(&g->node, FS_MUTEX_PARENT);
+ nested_lock_ref_node(&g->node, FS_LOCK_PARENT);
rule = add_rule_fg(g, spec->match_value,
flow_act, dest, dest_num, NULL);
if (!IS_ERR(rule) || PTR_ERR(rule) != -ENOSPC) {
@@ -1605,7 +1605,7 @@ static int build_match_list(struct match_list_head *match_head,
return ERR_PTR(-EINVAL);
}
- nested_lock_ref_node(&ft->node, FS_MUTEX_GRANDPARENT);
+ nested_lock_ref_node(&ft->node, FS_LOCK_GRANDPARENT);
rule = try_add_to_existing_fg(ft, spec, flow_act, dest, dest_num);
if (!IS_ERR(rule) || PTR_ERR(rule) != -ENOENT)
goto unlock;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index 6e5d25b..b5c079f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -80,7 +80,7 @@ struct fs_node {
struct fs_node *parent;
struct fs_node *root;
/* lock the node for writing and traversing */
- struct mutex lock;
+ struct rw_semaphore lock;
atomic_t refcount;
bool active;
void (*remove_func)(struct fs_node *);
--
1.8.3.1
--
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