linux/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_keys.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/refcount.h>

#include "item.h"
#include "core_acl_flex_keys.h"

/* For the purpose of the driver, define an internal storage scratchpad
 * that will be used to store key/mask values. For each defined element type
 * define an internal storage geometry.
 *
 * When adding new elements, MLXSW_AFK_ELEMENT_STORAGE_SIZE must be increased
 * accordingly.
 */
static const struct mlxsw_afk_element_info mlxsw_afk_element_infos[] = …;

struct mlxsw_afk { … };

static bool mlxsw_afk_blocks_check(struct mlxsw_afk *mlxsw_afk)
{ … }

struct mlxsw_afk *mlxsw_afk_create(unsigned int max_blocks,
				   const struct mlxsw_afk_ops *ops)
{ … }
EXPORT_SYMBOL(…);

void mlxsw_afk_destroy(struct mlxsw_afk *mlxsw_afk)
{ … }
EXPORT_SYMBOL(…);

struct mlxsw_afk_key_info { … };

static bool
mlxsw_afk_key_info_elements_eq(struct mlxsw_afk_key_info *key_info,
			       struct mlxsw_afk_element_usage *elusage)
{ … }

static struct mlxsw_afk_key_info *
mlxsw_afk_key_info_find(struct mlxsw_afk *mlxsw_afk,
			struct mlxsw_afk_element_usage *elusage)
{ … }

struct mlxsw_afk_picker { … };

static void mlxsw_afk_picker_count_hits(struct mlxsw_afk *mlxsw_afk,
					struct mlxsw_afk_picker *picker,
					enum mlxsw_afk_element element)
{ … }

static void mlxsw_afk_picker_subtract_hits(struct mlxsw_afk *mlxsw_afk,
					   struct mlxsw_afk_picker *picker,
					   int block_index)
{ … }

static int mlxsw_afk_picker_most_hits_get(struct mlxsw_afk *mlxsw_afk,
					  struct mlxsw_afk_picker *picker)
{ … }

static int mlxsw_afk_picker_key_info_add(struct mlxsw_afk *mlxsw_afk,
					 struct mlxsw_afk_picker *picker,
					 int block_index,
					 struct mlxsw_afk_key_info *key_info)
{ … }

static int mlxsw_afk_keys_fill(struct mlxsw_afk *mlxsw_afk,
			       unsigned long *chosen_blocks_bm,
			       struct mlxsw_afk_picker *picker,
			       struct mlxsw_afk_key_info *key_info)
{ … }

static int mlxsw_afk_picker(struct mlxsw_afk *mlxsw_afk,
			    struct mlxsw_afk_key_info *key_info,
			    struct mlxsw_afk_element_usage *elusage)
{ … }

static struct mlxsw_afk_key_info *
mlxsw_afk_key_info_create(struct mlxsw_afk *mlxsw_afk,
			  struct mlxsw_afk_element_usage *elusage)
{ … }

static void mlxsw_afk_key_info_destroy(struct mlxsw_afk_key_info *key_info)
{ … }

struct mlxsw_afk_key_info *
mlxsw_afk_key_info_get(struct mlxsw_afk *mlxsw_afk,
		       struct mlxsw_afk_element_usage *elusage)
{ … }
EXPORT_SYMBOL(…);

void mlxsw_afk_key_info_put(struct mlxsw_afk_key_info *key_info)
{ … }
EXPORT_SYMBOL(…);

bool mlxsw_afk_key_info_subset(struct mlxsw_afk_key_info *key_info,
			       struct mlxsw_afk_element_usage *elusage)
{ … }
EXPORT_SYMBOL(…);

static const struct mlxsw_afk_element_inst *
mlxsw_afk_block_elinst_get(const struct mlxsw_afk_block *block,
			   enum mlxsw_afk_element element)
{ … }

static const struct mlxsw_afk_element_inst *
mlxsw_afk_key_info_elinst_get(struct mlxsw_afk_key_info *key_info,
			      enum mlxsw_afk_element element,
			      int *p_block_index)
{ … }

u16
mlxsw_afk_key_info_block_encoding_get(const struct mlxsw_afk_key_info *key_info,
				      int block_index)
{ … }
EXPORT_SYMBOL(…);

unsigned int
mlxsw_afk_key_info_blocks_count_get(const struct mlxsw_afk_key_info *key_info)
{ … }
EXPORT_SYMBOL(…);

void mlxsw_afk_values_add_u32(struct mlxsw_afk_element_values *values,
			      enum mlxsw_afk_element element,
			      u32 key_value, u32 mask_value)
{ … }
EXPORT_SYMBOL(…);

void mlxsw_afk_values_add_buf(struct mlxsw_afk_element_values *values,
			      enum mlxsw_afk_element element,
			      const char *key_value, const char *mask_value,
			      unsigned int len)
{ … }
EXPORT_SYMBOL(…);

static void mlxsw_sp_afk_encode_u32(const struct mlxsw_item *storage_item,
				    const struct mlxsw_item *output_item,
				    char *storage, char *output, int diff)
{ … }

static void mlxsw_sp_afk_encode_buf(const struct mlxsw_item *storage_item,
				    const struct mlxsw_item *output_item,
				    char *storage, char *output)
{ … }

static void
mlxsw_sp_afk_encode_one(const struct mlxsw_afk_element_inst *elinst,
			char *output, char *storage, int u32_diff)
{ … }

#define MLXSW_SP_AFK_KEY_BLOCK_MAX_SIZE …

void mlxsw_afk_encode(struct mlxsw_afk *mlxsw_afk,
		      struct mlxsw_afk_key_info *key_info,
		      struct mlxsw_afk_element_values *values,
		      char *key, char *mask)
{ … }
EXPORT_SYMBOL(…);

void mlxsw_afk_clear(struct mlxsw_afk *mlxsw_afk, char *key,
		     int block_start, int block_end)
{ … }
EXPORT_SYMBOL(…);