net/mlx5: Move the entry index allocator to flow group

When new flow table entry is added, we search for free index
in the flow group and not in the flow table, therefore we can move
the allocator from flow table to flow group.
In downstream patches it will enable us to lock smaller part
of the steering tree.

Signed-off-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
index f390828..2a0b556 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
@@ -384,7 +384,6 @@ static void del_flow_table(struct fs_node *node)
        err = mlx5_cmd_destroy_flow_table(dev, ft);
        if (err)
                mlx5_core_warn(dev, "flow steering can't destroy ft\n");
-       ida_destroy(&ft->fte_allocator);
        rhltable_destroy(&ft->fgs_hash);
        fs_get_obj(prio, ft->node.parent);
        prio->num_ft--;
@@ -445,7 +444,7 @@ static void destroy_fte(struct fs_fte *fte, struct mlx5_flow_group *fg)
        WARN_ON(ret);
        fte->status = 0;
        fs_get_obj(ft, fg->node.parent);
-       ida_simple_remove(&ft->fte_allocator, fte->index);
+       ida_simple_remove(&fg->fte_allocator, fte->index - fg->start_index);
 }
 
 static void del_fte(struct fs_node *node)
@@ -488,6 +487,7 @@ static void del_flow_group(struct fs_node *node)
                ft->autogroup.num_groups--;
 
        rhashtable_destroy(&fg->ftes_hash);
+       ida_destroy(&fg->fte_allocator);
        err = rhltable_remove(&ft->fgs_hash,
                              &fg->hash,
                              rhash_fg);
@@ -537,6 +537,7 @@ static struct mlx5_flow_group *alloc_flow_group(u32 *create_fg_in)
                kfree(fg);
                return ERR_PTR(ret);
        }
+       ida_init(&fg->fte_allocator);
        fg->mask.match_criteria_enable = match_criteria_enable;
        memcpy(&fg->mask.match_criteria, match_criteria,
               sizeof(fg->mask.match_criteria));
@@ -575,7 +576,6 @@ static struct mlx5_flow_table *alloc_flow_table(int level, u16 vport, int max_ft
        ft->flags = flags;
        INIT_LIST_HEAD(&ft->fwd_rules);
        mutex_init(&ft->lock);
-       ida_init(&ft->fte_allocator);
 
        return ft;
 }
@@ -892,7 +892,6 @@ static struct mlx5_flow_table *__mlx5_create_flow_table(struct mlx5_flow_namespa
 destroy_ft:
        mlx5_cmd_destroy_flow_table(root->dev, ft);
 free_ft:
-       ida_destroy(&ft->fte_allocator);
        kfree(ft);
 unlock_root:
        mutex_unlock(&root->chain_lock);
@@ -1003,6 +1002,7 @@ err_remove_fg:
                                rhash_fg));
 err_free_fg:
        rhashtable_destroy(&fg->ftes_hash);
+       ida_destroy(&fg->fte_allocator);
        kfree(fg);
 
        return ERR_PTR(err);
@@ -1181,18 +1181,18 @@ static struct fs_fte *create_fte(struct mlx5_flow_group *fg,
                                 u32 *match_value,
                                 struct mlx5_flow_act *flow_act)
 {
-       struct mlx5_flow_table *ft;
        struct fs_fte *fte;
        int index;
        int ret;
 
-       fs_get_obj(ft, fg->node.parent);
-       index = ida_simple_get(&ft->fte_allocator, fg->start_index,
-                              fg->start_index + fg->max_ftes,
+       index = ida_simple_get(&fg->fte_allocator, 0,
+                              fg->max_ftes,
                               GFP_KERNEL);
        if (index < 0)
                return ERR_PTR(index);
 
+       index += fg->start_index;
+
        fte = alloc_fte(flow_act, match_value, index);
        if (IS_ERR(fte)) {
                ret = PTR_ERR(fte);
@@ -1207,7 +1207,7 @@ static struct fs_fte *create_fte(struct mlx5_flow_group *fg,
 err_hash:
        kfree(fte);
 err_alloc:
-       ida_simple_remove(&ft->fte_allocator, index);
+       ida_simple_remove(&fg->fte_allocator, index - fg->start_index);
        return ERR_PTR(ret);
 }
 

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
index 5509a75..02c969c 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h
@@ -119,7 +119,6 @@ struct mlx5_flow_table {
        /* FWD rules that point on this flow table */
        struct list_head                fwd_rules;
        u32                             flags;
-       struct ida                      fte_allocator;
        struct rhltable                 fgs_hash;
 };
 
@@ -199,6 +198,7 @@ struct mlx5_flow_group {
        struct mlx5_flow_group_mask     mask;
        u32                             start_index;
        u32                             max_ftes;
+       struct ida                      fte_allocator;
        u32                             id;
        struct rhashtable               ftes_hash;
        struct rhlist_head              hash;