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Date: Mon, 24 Oct 2022 14:57:34 +0100
From: Saeed Mahameed <saeed@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Eric Dumazet <edumazet@...gle.com>
Cc: Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
Tariq Toukan <tariqt@...dia.com>,
Yevgeny Kliteynik <kliteyn@...dia.com>,
Alex Vesker <valex@...dia.com>
Subject: [net-next 14/14] net/mlx5: DR, Remove the buddy used_list
From: Yevgeny Kliteynik <kliteyn@...dia.com>
No need to have the used_list - we don't need to keep track of the
used chunks, we only need to know the amount of used memory.
Signed-off-by: Yevgeny Kliteynik <kliteyn@...dia.com>
Reviewed-by: Alex Vesker <valex@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
.../mellanox/mlx5/core/steering/dr_buddy.c | 1 -
.../mellanox/mlx5/core/steering/dr_icm_pool.c | 50 +++++--------------
.../mellanox/mlx5/core/steering/dr_types.h | 1 -
.../mellanox/mlx5/core/steering/mlx5dr.h | 3 +-
4 files changed, 13 insertions(+), 42 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_buddy.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_buddy.c
index 7e30dc64c10c..fe228d948b47 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_buddy.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_buddy.c
@@ -15,7 +15,6 @@ int mlx5dr_buddy_init(struct mlx5dr_icm_buddy_mem *buddy,
buddy->max_order = max_order;
INIT_LIST_HEAD(&buddy->list_node);
- INIT_LIST_HEAD(&buddy->used_list);
buddy->bitmap = kcalloc(buddy->max_order + 1,
sizeof(*buddy->bitmap),
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
index c31608a3f11c..3eb6719bc8eb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_icm_pool.c
@@ -207,17 +207,6 @@ static void dr_icm_chunk_ste_init(struct mlx5dr_icm_chunk *chunk, int offset)
num_of_entries * sizeof(chunk->ste_arr[0]));
}
-static void dr_icm_chunk_destroy(struct mlx5dr_icm_chunk *chunk)
-{
- struct kmem_cache *chunks_cache =
- chunk->buddy_mem->pool->chunks_kmem_cache;
-
- chunk->buddy_mem->used_memory -= mlx5dr_icm_pool_get_chunk_byte_size(chunk);
- list_del(&chunk->chunk_list);
-
- kmem_cache_free(chunks_cache, chunk);
-}
-
static int dr_icm_buddy_init_ste_cache(struct mlx5dr_icm_buddy_mem *buddy)
{
int num_of_entries =
@@ -297,11 +286,6 @@ static int dr_icm_buddy_create(struct mlx5dr_icm_pool *pool)
static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy)
{
- struct mlx5dr_icm_chunk *chunk, *next;
-
- list_for_each_entry_safe(chunk, next, &buddy->used_list, chunk_list)
- dr_icm_chunk_destroy(chunk);
-
dr_icm_pool_mr_destroy(buddy->icm_mr);
mlx5dr_buddy_cleanup(buddy);
@@ -312,36 +296,25 @@ static void dr_icm_buddy_destroy(struct mlx5dr_icm_buddy_mem *buddy)
kvfree(buddy);
}
-static struct mlx5dr_icm_chunk *
-dr_icm_chunk_create(struct mlx5dr_icm_pool *pool,
- enum mlx5dr_icm_chunk_size chunk_size,
- struct mlx5dr_icm_buddy_mem *buddy_mem_pool,
- unsigned int seg)
+static void
+dr_icm_chunk_init(struct mlx5dr_icm_chunk *chunk,
+ struct mlx5dr_icm_pool *pool,
+ enum mlx5dr_icm_chunk_size chunk_size,
+ struct mlx5dr_icm_buddy_mem *buddy_mem_pool,
+ unsigned int seg)
{
- struct kmem_cache *chunks_cache = buddy_mem_pool->pool->chunks_kmem_cache;
- struct mlx5dr_icm_chunk *chunk;
int offset;
- chunk = kmem_cache_alloc(chunks_cache, GFP_KERNEL);
- if (!chunk)
- return NULL;
-
- offset = mlx5dr_icm_pool_dm_type_to_entry_size(pool->icm_type) * seg;
-
chunk->seg = seg;
chunk->size = chunk_size;
chunk->buddy_mem = buddy_mem_pool;
- if (pool->icm_type == DR_ICM_TYPE_STE)
+ if (pool->icm_type == DR_ICM_TYPE_STE) {
+ offset = mlx5dr_icm_pool_dm_type_to_entry_size(pool->icm_type) * seg;
dr_icm_chunk_ste_init(chunk, offset);
+ }
buddy_mem_pool->used_memory += mlx5dr_icm_pool_get_chunk_byte_size(chunk);
- INIT_LIST_HEAD(&chunk->chunk_list);
-
- /* chunk now is part of the used_list */
- list_add_tail(&chunk->chunk_list, &buddy_mem_pool->used_list);
-
- return chunk;
}
static bool dr_icm_pool_is_sync_required(struct mlx5dr_icm_pool *pool)
@@ -463,10 +436,12 @@ mlx5dr_icm_alloc_chunk(struct mlx5dr_icm_pool *pool,
if (ret)
goto out;
- chunk = dr_icm_chunk_create(pool, chunk_size, buddy, seg);
+ chunk = kmem_cache_alloc(pool->chunks_kmem_cache, GFP_KERNEL);
if (!chunk)
goto out_err;
+ dr_icm_chunk_init(chunk, pool, chunk_size, buddy, seg);
+
goto out;
out_err:
@@ -495,7 +470,6 @@ void mlx5dr_icm_free_chunk(struct mlx5dr_icm_chunk *chunk)
hot_chunk->seg = chunk->seg;
hot_chunk->size = chunk->size;
- list_del(&chunk->chunk_list);
kmem_cache_free(chunks_cache, chunk);
/* Check if we have chunks that are waiting for sync-ste */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
index bd2c3073591e..41a37b9ac98b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
@@ -1111,7 +1111,6 @@ int mlx5dr_rule_get_reverse_rule_members(struct mlx5dr_ste **ste_arr,
struct mlx5dr_icm_chunk {
struct mlx5dr_icm_buddy_mem *buddy_mem;
- struct list_head chunk_list;
/* indicates the index of this chunk in the whole memory,
* used for deleting the chunk from the buddy
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/mlx5dr.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/mlx5dr.h
index 674efb3607b1..84ed77763b21 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/mlx5dr.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/mlx5dr.h
@@ -164,8 +164,7 @@ struct mlx5dr_icm_buddy_mem {
struct mlx5dr_icm_mr *icm_mr;
struct mlx5dr_icm_pool *pool;
- /* This is the list of used chunks. HW may be accessing this memory */
- struct list_head used_list;
+ /* Amount of memory in used chunks - HW may be accessing this memory */
u64 used_memory;
/* Memory optimisation */
--
2.37.3
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