blob: c14590acc7726061a880b72a2ea1c87b7b22e730 [file] [log] [blame]
// 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 (16 * 1024 * 1024)
static const unsigned int FT_POOLS[] = { 4 * 1024 * 1024,
1 * 1024 * 1024,
64 * 1024,
128,
1 /* size for termination tables */ };
struct mlx5_ft_pool {
int ft_left[ARRAY_SIZE(FT_POOLS)];
};
int mlx5_ft_pool_init(struct mlx5_core_dev *dev)
{
struct mlx5_ft_pool *ft_pool;
int i;
ft_pool = kzalloc(sizeof(*ft_pool), GFP_KERNEL);
if (!ft_pool)
return -ENOMEM;
for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--)
ft_pool->ft_left[i] = FT_SIZE / FT_POOLS[i];
dev->priv.ft_pool = ft_pool;
return 0;
}
void mlx5_ft_pool_destroy(struct mlx5_core_dev *dev)
{
kfree(dev->priv.ft_pool);
}
int
mlx5_ft_pool_get_avail_sz(struct mlx5_core_dev *dev, enum fs_flow_table_type table_type,
int desired_size)
{
u32 max_ft_size = 1 << MLX5_CAP_FLOWTABLE_TYPE(dev, log_max_ft_size, table_type);
int i, found_i = -1;
for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--) {
if (dev->priv.ft_pool->ft_left[i] && FT_POOLS[i] >= desired_size &&
FT_POOLS[i] <= max_ft_size) {
found_i = i;
if (desired_size != POOL_NEXT_SIZE)
break;
}
}
if (found_i != -1) {
--dev->priv.ft_pool->ft_left[found_i];
return FT_POOLS[found_i];
}
return 0;
}
void
mlx5_ft_pool_put_sz(struct mlx5_core_dev *dev, int sz)
{
int i;
if (!sz)
return;
for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--) {
if (sz == FT_POOLS[i]) {
++dev->priv.ft_pool->ft_left[i];
return;
}
}
WARN_ONCE(1, "Couldn't find size %d in flow table size pool", sz);
}