net/mlx5: Keep only one bulk of full available DEKs

One bulk with full available keys is left undestroyed, to service the
possible requests from users quickly.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
index e078530..3a94b8f 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/crypto.c
@@ -506,12 +506,19 @@ static void mlx5_crypto_dek_bulk_reset_synced(struct mlx5_crypto_dek_pool *pool,
        }
 }
 
-static void mlx5_crypto_dek_bulk_handle_avail(struct mlx5_crypto_dek_pool *pool,
+/* Return true if the bulk is reused, false if destroyed with delay */
+static bool mlx5_crypto_dek_bulk_handle_avail(struct mlx5_crypto_dek_pool *pool,
                                              struct mlx5_crypto_dek_bulk *bulk,
                                              struct list_head *destroy_list)
 {
+       if (list_empty(&pool->avail_list)) {
+               list_move(&bulk->entry, &pool->avail_list);
+               return true;
+       }
+
        mlx5_crypto_dek_pool_remove_bulk(pool, bulk, true);
        list_add(&bulk->entry, destroy_list);
+       return false;
 }
 
 static void mlx5_crypto_dek_pool_splice_destroy_list(struct mlx5_crypto_dek_pool *pool,
@@ -535,7 +542,7 @@ static void mlx5_crypto_dek_pool_free_wait_keys(struct mlx5_crypto_dek_pool *poo
 
 /* For all the bulks in each list, reset the bits while sync.
  * Move them to different lists according to the number of available DEKs.
- * Destrory all the idle bulks for now.
+ * Destrory all the idle bulks, except one for quick service.
  * And free DEKs in the waiting list at the end of this func.
  */
 static void mlx5_crypto_dek_pool_reset_synced(struct mlx5_crypto_dek_pool *pool)
@@ -562,11 +569,12 @@ static void mlx5_crypto_dek_pool_reset_synced(struct mlx5_crypto_dek_pool *pool)
        }
 
        list_for_each_entry_safe(bulk, tmp, &pool->sync_list, entry) {
-               memset(bulk->need_sync, 0, BITS_TO_BYTES(bulk->num_deks));
-               bulk->avail_start = 0;
                bulk->avail_deks = bulk->num_deks;
                pool->avail_deks += bulk->num_deks;
-               mlx5_crypto_dek_bulk_handle_avail(pool, bulk, &destroy_list);
+               if (mlx5_crypto_dek_bulk_handle_avail(pool, bulk, &destroy_list)) {
+                       memset(bulk->need_sync, 0, BITS_TO_BYTES(bulk->num_deks));
+                       bulk->avail_start = 0;
+               }
        }
 
        mlx5_crypto_dek_pool_free_wait_keys(pool);