linux/drivers/net/ethernet/mellanox/mlx5/core/fs_ft_pool.c

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2021 Mellanox Technologies. */

#include "fs_ft_pool.h"

/* Firmware currently has 4 pool of 4 sizes that it supports (FT_POOLS),
 * and a virtual memory region of 16M (MLX5_FT_SIZE), this region is duplicated
 * for each flow table pool. We can allocate up to 16M of each pool,
 * and we keep track of how much we used via mlx5_ft_pool_get_avail_sz.
 * Firmware doesn't report any of this for now.
 * ESW_POOL is expected to be sorted from large to small and match firmware
 * pools.
 */
#define FT_SIZE …
static const unsigned int FT_POOLS[] = …;
struct mlx5_ft_pool { … };

int mlx5_ft_pool_init(struct mlx5_core_dev *dev)
{ … }

void mlx5_ft_pool_destroy(struct mlx5_core_dev *dev)
{ … }

int
mlx5_ft_pool_get_avail_sz(struct mlx5_core_dev *dev, enum fs_flow_table_type table_type,
			  int desired_size)
{ … }

void
mlx5_ft_pool_put_sz(struct mlx5_core_dev *dev, int sz)
{ … }