linux/net/mac80211/rate.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright (c) 2006 Jiri Benc <[email protected]>
 * Copyright 2017	Intel Deutschland GmbH
 * Copyright (C) 2019, 2022-2024 Intel Corporation
 */

#include <linux/kernel.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "rate.h"
#include "ieee80211_i.h"
#include "debugfs.h"

struct rate_control_alg { … };

static LIST_HEAD(rate_ctrl_algs);
static DEFINE_MUTEX(rate_ctrl_mutex);

static char *ieee80211_default_rc_algo = …;
module_param(ieee80211_default_rc_algo, charp, 0644);
MODULE_PARM_DESC(…) …;

void rate_control_rate_init(struct sta_info *sta)
{ … }

void rate_control_tx_status(struct ieee80211_local *local,
			    struct ieee80211_tx_status *st)
{ … }

void rate_control_rate_update(struct ieee80211_local *local,
			      struct ieee80211_supported_band *sband,
			      struct sta_info *sta, unsigned int link_id,
			      u32 changed)
{ … }

int ieee80211_rate_control_register(const struct rate_control_ops *ops)
{ … }
EXPORT_SYMBOL(…);

void ieee80211_rate_control_unregister(const struct rate_control_ops *ops)
{ … }
EXPORT_SYMBOL(…);

static const struct rate_control_ops *
ieee80211_try_rate_control_ops_get(const char *name)
{ … }

/* Get the rate control algorithm. */
static const struct rate_control_ops *
ieee80211_rate_control_ops_get(const char *name)
{ … }

#ifdef CONFIG_MAC80211_DEBUGFS
static ssize_t rcname_read(struct file *file, char __user *userbuf,
			   size_t count, loff_t *ppos)
{ … }

const struct file_operations rcname_ops = …;
#endif

static struct rate_control_ref *
rate_control_alloc(const char *name, struct ieee80211_local *local)
{ … }

static void rate_control_free(struct ieee80211_local *local,
			      struct rate_control_ref *ctrl_ref)
{ … }

void ieee80211_check_rate_mask(struct ieee80211_link_data *link)
{ … }

static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
{ … }

static void rc_send_low_basicrate(struct ieee80211_tx_rate *rate,
				  u32 basic_rates,
				  struct ieee80211_supported_band *sband)
{ … }

static void __rate_control_send_low(struct ieee80211_hw *hw,
				    struct ieee80211_supported_band *sband,
				    struct ieee80211_sta *sta,
				    struct ieee80211_tx_info *info,
				    u32 rate_mask)
{ … }


static bool rate_control_send_low(struct ieee80211_sta *pubsta,
				  struct ieee80211_tx_rate_control *txrc)
{ … }

static bool rate_idx_match_legacy_mask(s8 *rate_idx, int n_bitrates, u32 mask)
{ … }

static bool rate_idx_match_mcs_mask(s8 *rate_idx, u8 *mcs_mask)
{ … }

static bool rate_idx_match_vht_mcs_mask(s8 *rate_idx, u16 *vht_mask)
{ … }

static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags,
				struct ieee80211_supported_band *sband,
				enum nl80211_chan_width chan_width,
				u32 mask,
				u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
				u16 vht_mask[NL80211_VHT_NSS_MAX])
{ … }

static void rate_fixup_ratelist(struct ieee80211_vif *vif,
				struct ieee80211_supported_band *sband,
				struct ieee80211_tx_info *info,
				struct ieee80211_tx_rate *rates,
				int max_rates)
{ … }


static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
					struct ieee80211_tx_info *info,
					struct ieee80211_tx_rate *rates,
					int max_rates)
{ … }

static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata,
				  struct ieee80211_supported_band *sband,
				  struct ieee80211_sta *sta, u32 *mask,
				  u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN],
				  u16 vht_mask[NL80211_VHT_NSS_MAX])
{ … }

static void
rate_control_apply_mask_ratetbl(struct sta_info *sta,
				struct ieee80211_supported_band *sband,
				struct ieee80211_sta_rates *rates)
{ … }

static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
				    struct ieee80211_sta *sta,
				    struct ieee80211_supported_band *sband,
				    struct ieee80211_tx_rate *rates,
				    int max_rates)
{ … }

void ieee80211_get_tx_rates(struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta,
			    struct sk_buff *skb,
			    struct ieee80211_tx_rate *dest,
			    int max_rates)
{ … }
EXPORT_SYMBOL(…);

void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
			   struct sta_info *sta,
			   struct ieee80211_tx_rate_control *txrc)
{ … }

int rate_control_set_rates(struct ieee80211_hw *hw,
			   struct ieee80211_sta *pubsta,
			   struct ieee80211_sta_rates *rates)
{ … }
EXPORT_SYMBOL(…);

int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
				 const char *name)
{ … }

void rate_control_deinitialize(struct ieee80211_local *local)
{ … }