mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 09:08:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
760
net/mac80211/rate.c
Normal file
760
net/mac80211/rate.c
Normal file
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@ -0,0 +1,760 @@
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/*
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* Copyright 2002-2005, Instant802 Networks, Inc.
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* Copyright 2005-2006, Devicescape Software, Inc.
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/rtnetlink.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include "rate.h"
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#include "ieee80211_i.h"
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#include "debugfs.h"
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struct rate_control_alg {
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struct list_head list;
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const struct rate_control_ops *ops;
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};
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static LIST_HEAD(rate_ctrl_algs);
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static DEFINE_MUTEX(rate_ctrl_mutex);
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static char *ieee80211_default_rc_algo = CONFIG_MAC80211_RC_DEFAULT;
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module_param(ieee80211_default_rc_algo, charp, 0644);
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MODULE_PARM_DESC(ieee80211_default_rc_algo,
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"Default rate control algorithm for mac80211 to use");
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int ieee80211_rate_control_register(const struct rate_control_ops *ops)
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{
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struct rate_control_alg *alg;
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if (!ops->name)
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return -EINVAL;
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mutex_lock(&rate_ctrl_mutex);
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list_for_each_entry(alg, &rate_ctrl_algs, list) {
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if (!strcmp(alg->ops->name, ops->name)) {
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/* don't register an algorithm twice */
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WARN_ON(1);
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mutex_unlock(&rate_ctrl_mutex);
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return -EALREADY;
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}
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}
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alg = kzalloc(sizeof(*alg), GFP_KERNEL);
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if (alg == NULL) {
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mutex_unlock(&rate_ctrl_mutex);
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return -ENOMEM;
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}
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alg->ops = ops;
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list_add_tail(&alg->list, &rate_ctrl_algs);
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mutex_unlock(&rate_ctrl_mutex);
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return 0;
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}
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EXPORT_SYMBOL(ieee80211_rate_control_register);
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void ieee80211_rate_control_unregister(const struct rate_control_ops *ops)
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{
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struct rate_control_alg *alg;
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mutex_lock(&rate_ctrl_mutex);
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list_for_each_entry(alg, &rate_ctrl_algs, list) {
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if (alg->ops == ops) {
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list_del(&alg->list);
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kfree(alg);
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break;
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}
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}
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mutex_unlock(&rate_ctrl_mutex);
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}
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EXPORT_SYMBOL(ieee80211_rate_control_unregister);
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static const struct rate_control_ops *
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ieee80211_try_rate_control_ops_get(const char *name)
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{
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struct rate_control_alg *alg;
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const struct rate_control_ops *ops = NULL;
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if (!name)
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return NULL;
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mutex_lock(&rate_ctrl_mutex);
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list_for_each_entry(alg, &rate_ctrl_algs, list) {
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if (!strcmp(alg->ops->name, name)) {
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ops = alg->ops;
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break;
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}
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}
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mutex_unlock(&rate_ctrl_mutex);
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return ops;
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}
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/* Get the rate control algorithm. */
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static const struct rate_control_ops *
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ieee80211_rate_control_ops_get(const char *name)
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{
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const struct rate_control_ops *ops;
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const char *alg_name;
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kparam_block_sysfs_write(ieee80211_default_rc_algo);
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if (!name)
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alg_name = ieee80211_default_rc_algo;
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else
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alg_name = name;
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ops = ieee80211_try_rate_control_ops_get(alg_name);
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if (!ops && name)
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/* try default if specific alg requested but not found */
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ops = ieee80211_try_rate_control_ops_get(ieee80211_default_rc_algo);
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/* try built-in one if specific alg requested but not found */
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if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
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ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
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kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
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return ops;
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}
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#ifdef CONFIG_MAC80211_DEBUGFS
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static ssize_t rcname_read(struct file *file, char __user *userbuf,
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size_t count, loff_t *ppos)
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{
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struct rate_control_ref *ref = file->private_data;
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int len = strlen(ref->ops->name);
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return simple_read_from_buffer(userbuf, count, ppos,
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ref->ops->name, len);
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}
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static const struct file_operations rcname_ops = {
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.read = rcname_read,
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.open = simple_open,
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.llseek = default_llseek,
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};
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#endif
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static struct rate_control_ref *rate_control_alloc(const char *name,
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struct ieee80211_local *local)
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{
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struct dentry *debugfsdir = NULL;
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struct rate_control_ref *ref;
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ref = kmalloc(sizeof(struct rate_control_ref), GFP_KERNEL);
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if (!ref)
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return NULL;
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ref->local = local;
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ref->ops = ieee80211_rate_control_ops_get(name);
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if (!ref->ops)
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goto free;
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#ifdef CONFIG_MAC80211_DEBUGFS
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debugfsdir = debugfs_create_dir("rc", local->hw.wiphy->debugfsdir);
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local->debugfs.rcdir = debugfsdir;
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debugfs_create_file("name", 0400, debugfsdir, ref, &rcname_ops);
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#endif
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ref->priv = ref->ops->alloc(&local->hw, debugfsdir);
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if (!ref->priv)
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goto free;
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return ref;
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free:
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kfree(ref);
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return NULL;
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}
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static void rate_control_free(struct rate_control_ref *ctrl_ref)
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{
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ctrl_ref->ops->free(ctrl_ref->priv);
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#ifdef CONFIG_MAC80211_DEBUGFS
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debugfs_remove_recursive(ctrl_ref->local->debugfs.rcdir);
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ctrl_ref->local->debugfs.rcdir = NULL;
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#endif
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kfree(ctrl_ref);
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}
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static bool rc_no_data_or_no_ack_use_min(struct ieee80211_tx_rate_control *txrc)
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{
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struct sk_buff *skb = txrc->skb;
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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__le16 fc;
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fc = hdr->frame_control;
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return (info->flags & (IEEE80211_TX_CTL_NO_ACK |
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IEEE80211_TX_CTL_USE_MINRATE)) ||
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!ieee80211_is_data(fc);
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}
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static void rc_send_low_basicrate(s8 *idx, u32 basic_rates,
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struct ieee80211_supported_band *sband)
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{
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u8 i;
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if (basic_rates == 0)
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return; /* assume basic rates unknown and accept rate */
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if (*idx < 0)
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return;
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if (basic_rates & (1 << *idx))
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return; /* selected rate is a basic rate */
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for (i = *idx + 1; i <= sband->n_bitrates; i++) {
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if (basic_rates & (1 << i)) {
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*idx = i;
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return;
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}
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}
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/* could not find a basic rate; use original selection */
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}
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static void __rate_control_send_low(struct ieee80211_hw *hw,
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struct ieee80211_supported_band *sband,
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struct ieee80211_sta *sta,
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struct ieee80211_tx_info *info,
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u32 rate_mask)
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{
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int i;
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u32 rate_flags =
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ieee80211_chandef_rate_flags(&hw->conf.chandef);
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if ((sband->band == IEEE80211_BAND_2GHZ) &&
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(info->flags & IEEE80211_TX_CTL_NO_CCK_RATE))
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rate_flags |= IEEE80211_RATE_ERP_G;
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info->control.rates[0].idx = 0;
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for (i = 0; i < sband->n_bitrates; i++) {
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if (!(rate_mask & BIT(i)))
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continue;
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if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
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continue;
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if (!rate_supported(sta, sband->band, i))
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continue;
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info->control.rates[0].idx = i;
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break;
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}
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WARN_ON_ONCE(i == sband->n_bitrates);
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info->control.rates[0].count =
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(info->flags & IEEE80211_TX_CTL_NO_ACK) ?
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1 : hw->max_rate_tries;
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info->control.skip_table = 1;
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}
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bool rate_control_send_low(struct ieee80211_sta *pubsta,
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void *priv_sta,
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struct ieee80211_tx_rate_control *txrc)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
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struct ieee80211_supported_band *sband = txrc->sband;
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struct sta_info *sta;
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int mcast_rate;
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bool use_basicrate = false;
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if (!pubsta || !priv_sta || rc_no_data_or_no_ack_use_min(txrc)) {
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__rate_control_send_low(txrc->hw, sband, pubsta, info,
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txrc->rate_idx_mask);
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if (!pubsta && txrc->bss) {
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mcast_rate = txrc->bss_conf->mcast_rate[sband->band];
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if (mcast_rate > 0) {
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info->control.rates[0].idx = mcast_rate - 1;
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return true;
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}
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use_basicrate = true;
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} else if (pubsta) {
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sta = container_of(pubsta, struct sta_info, sta);
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if (ieee80211_vif_is_mesh(&sta->sdata->vif))
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use_basicrate = true;
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}
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if (use_basicrate)
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rc_send_low_basicrate(&info->control.rates[0].idx,
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txrc->bss_conf->basic_rates,
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sband);
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return true;
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}
|
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return false;
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}
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EXPORT_SYMBOL(rate_control_send_low);
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static bool rate_idx_match_legacy_mask(struct ieee80211_tx_rate *rate,
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int n_bitrates, u32 mask)
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||||
{
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int j;
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||||
|
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/* See whether the selected rate or anything below it is allowed. */
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for (j = rate->idx; j >= 0; j--) {
|
||||
if (mask & (1 << j)) {
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||||
/* Okay, found a suitable rate. Use it. */
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||||
rate->idx = j;
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return true;
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||||
}
|
||||
}
|
||||
|
||||
/* Try to find a higher rate that would be allowed */
|
||||
for (j = rate->idx + 1; j < n_bitrates; j++) {
|
||||
if (mask & (1 << j)) {
|
||||
/* Okay, found a suitable rate. Use it. */
|
||||
rate->idx = j;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate,
|
||||
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
|
||||
{
|
||||
int i, j;
|
||||
int ridx, rbit;
|
||||
|
||||
ridx = rate->idx / 8;
|
||||
rbit = rate->idx % 8;
|
||||
|
||||
/* sanity check */
|
||||
if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN)
|
||||
return false;
|
||||
|
||||
/* See whether the selected rate or anything below it is allowed. */
|
||||
for (i = ridx; i >= 0; i--) {
|
||||
for (j = rbit; j >= 0; j--)
|
||||
if (mcs_mask[i] & BIT(j)) {
|
||||
rate->idx = i * 8 + j;
|
||||
return true;
|
||||
}
|
||||
rbit = 7;
|
||||
}
|
||||
|
||||
/* Try to find a higher rate that would be allowed */
|
||||
ridx = (rate->idx + 1) / 8;
|
||||
rbit = (rate->idx + 1) % 8;
|
||||
|
||||
for (i = ridx; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
|
||||
for (j = rbit; j < 8; j++)
|
||||
if (mcs_mask[i] & BIT(j)) {
|
||||
rate->idx = i * 8 + j;
|
||||
return true;
|
||||
}
|
||||
rbit = 0;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static void rate_idx_match_mask(struct ieee80211_tx_rate *rate,
|
||||
struct ieee80211_supported_band *sband,
|
||||
enum nl80211_chan_width chan_width,
|
||||
u32 mask,
|
||||
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN])
|
||||
{
|
||||
struct ieee80211_tx_rate alt_rate;
|
||||
|
||||
/* handle HT rates */
|
||||
if (rate->flags & IEEE80211_TX_RC_MCS) {
|
||||
if (rate_idx_match_mcs_mask(rate, mcs_mask))
|
||||
return;
|
||||
|
||||
/* also try the legacy rates. */
|
||||
alt_rate.idx = 0;
|
||||
/* keep protection flags */
|
||||
alt_rate.flags = rate->flags &
|
||||
(IEEE80211_TX_RC_USE_RTS_CTS |
|
||||
IEEE80211_TX_RC_USE_CTS_PROTECT |
|
||||
IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
|
||||
alt_rate.count = rate->count;
|
||||
if (rate_idx_match_legacy_mask(&alt_rate,
|
||||
sband->n_bitrates, mask)) {
|
||||
*rate = alt_rate;
|
||||
return;
|
||||
}
|
||||
} else {
|
||||
/* handle legacy rates */
|
||||
if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask))
|
||||
return;
|
||||
|
||||
/* if HT BSS, and we handle a data frame, also try HT rates */
|
||||
switch (chan_width) {
|
||||
case NL80211_CHAN_WIDTH_20_NOHT:
|
||||
case NL80211_CHAN_WIDTH_5:
|
||||
case NL80211_CHAN_WIDTH_10:
|
||||
return;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
alt_rate.idx = 0;
|
||||
/* keep protection flags */
|
||||
alt_rate.flags = rate->flags &
|
||||
(IEEE80211_TX_RC_USE_RTS_CTS |
|
||||
IEEE80211_TX_RC_USE_CTS_PROTECT |
|
||||
IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
|
||||
alt_rate.count = rate->count;
|
||||
|
||||
alt_rate.flags |= IEEE80211_TX_RC_MCS;
|
||||
|
||||
if (chan_width == NL80211_CHAN_WIDTH_40)
|
||||
alt_rate.flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
|
||||
|
||||
if (rate_idx_match_mcs_mask(&alt_rate, mcs_mask)) {
|
||||
*rate = alt_rate;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Uh.. No suitable rate exists. This should not really happen with
|
||||
* sane TX rate mask configurations. However, should someone manage to
|
||||
* configure supported rates and TX rate mask in incompatible way,
|
||||
* allow the frame to be transmitted with whatever the rate control
|
||||
* selected.
|
||||
*/
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
struct ieee80211_rate *rate;
|
||||
bool inval = false;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* Set up the RTS/CTS rate as the fastest basic rate
|
||||
* that is not faster than the data rate unless there
|
||||
* is no basic rate slower than the data rate, in which
|
||||
* case we pick the slowest basic rate
|
||||
*
|
||||
* XXX: Should this check all retry rates?
|
||||
*/
|
||||
if (!(rates[0].flags & IEEE80211_TX_RC_MCS)) {
|
||||
u32 basic_rates = vif->bss_conf.basic_rates;
|
||||
s8 baserate = basic_rates ? ffs(basic_rates) - 1 : 0;
|
||||
|
||||
rate = &sband->bitrates[rates[0].idx];
|
||||
|
||||
for (i = 0; i < sband->n_bitrates; i++) {
|
||||
/* must be a basic rate */
|
||||
if (!(basic_rates & BIT(i)))
|
||||
continue;
|
||||
/* must not be faster than the data rate */
|
||||
if (sband->bitrates[i].bitrate > rate->bitrate)
|
||||
continue;
|
||||
/* maximum */
|
||||
if (sband->bitrates[baserate].bitrate <
|
||||
sband->bitrates[i].bitrate)
|
||||
baserate = i;
|
||||
}
|
||||
|
||||
info->control.rts_cts_rate_idx = baserate;
|
||||
}
|
||||
|
||||
for (i = 0; i < max_rates; i++) {
|
||||
/*
|
||||
* make sure there's no valid rate following
|
||||
* an invalid one, just in case drivers don't
|
||||
* take the API seriously to stop at -1.
|
||||
*/
|
||||
if (inval) {
|
||||
rates[i].idx = -1;
|
||||
continue;
|
||||
}
|
||||
if (rates[i].idx < 0) {
|
||||
inval = true;
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* For now assume MCS is already set up correctly, this
|
||||
* needs to be fixed.
|
||||
*/
|
||||
if (rates[i].flags & IEEE80211_TX_RC_MCS) {
|
||||
WARN_ON(rates[i].idx > 76);
|
||||
|
||||
if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
|
||||
info->control.use_cts_prot)
|
||||
rates[i].flags |=
|
||||
IEEE80211_TX_RC_USE_CTS_PROTECT;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (rates[i].flags & IEEE80211_TX_RC_VHT_MCS) {
|
||||
WARN_ON(ieee80211_rate_get_vht_mcs(&rates[i]) > 9);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* set up RTS protection if desired */
|
||||
if (info->control.use_rts) {
|
||||
rates[i].flags |= IEEE80211_TX_RC_USE_RTS_CTS;
|
||||
info->control.use_cts_prot = false;
|
||||
}
|
||||
|
||||
/* RC is busted */
|
||||
if (WARN_ON_ONCE(rates[i].idx >= sband->n_bitrates)) {
|
||||
rates[i].idx = -1;
|
||||
continue;
|
||||
}
|
||||
|
||||
rate = &sband->bitrates[rates[i].idx];
|
||||
|
||||
/* set up short preamble */
|
||||
if (info->control.short_preamble &&
|
||||
rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
|
||||
rates[i].flags |= IEEE80211_TX_RC_USE_SHORT_PREAMBLE;
|
||||
|
||||
/* set up G protection */
|
||||
if (!(rates[i].flags & IEEE80211_TX_RC_USE_RTS_CTS) &&
|
||||
info->control.use_cts_prot &&
|
||||
rate->flags & IEEE80211_RATE_ERP_G)
|
||||
rates[i].flags |= IEEE80211_TX_RC_USE_CTS_PROTECT;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void rate_control_fill_sta_table(struct ieee80211_sta *sta,
|
||||
struct ieee80211_tx_info *info,
|
||||
struct ieee80211_tx_rate *rates,
|
||||
int max_rates)
|
||||
{
|
||||
struct ieee80211_sta_rates *ratetbl = NULL;
|
||||
int i;
|
||||
|
||||
if (sta && !info->control.skip_table)
|
||||
ratetbl = rcu_dereference(sta->rates);
|
||||
|
||||
/* Fill remaining rate slots with data from the sta rate table. */
|
||||
max_rates = min_t(int, max_rates, IEEE80211_TX_RATE_TABLE_SIZE);
|
||||
for (i = 0; i < max_rates; i++) {
|
||||
if (i < ARRAY_SIZE(info->control.rates) &&
|
||||
info->control.rates[i].idx >= 0 &&
|
||||
info->control.rates[i].count) {
|
||||
if (rates != info->control.rates)
|
||||
rates[i] = info->control.rates[i];
|
||||
} else if (ratetbl) {
|
||||
rates[i].idx = ratetbl->rate[i].idx;
|
||||
rates[i].flags = ratetbl->rate[i].flags;
|
||||
if (info->control.use_rts)
|
||||
rates[i].count = ratetbl->rate[i].count_rts;
|
||||
else if (info->control.use_cts_prot)
|
||||
rates[i].count = ratetbl->rate[i].count_cts;
|
||||
else
|
||||
rates[i].count = ratetbl->rate[i].count;
|
||||
} else {
|
||||
rates[i].idx = -1;
|
||||
rates[i].count = 0;
|
||||
}
|
||||
|
||||
if (rates[i].idx < 0 || !rates[i].count)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata,
|
||||
struct ieee80211_sta *sta,
|
||||
struct ieee80211_supported_band *sband,
|
||||
struct ieee80211_tx_info *info,
|
||||
struct ieee80211_tx_rate *rates,
|
||||
int max_rates)
|
||||
{
|
||||
enum nl80211_chan_width chan_width;
|
||||
u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN];
|
||||
bool has_mcs_mask;
|
||||
u32 mask;
|
||||
u32 rate_flags;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* Try to enforce the rateidx mask the user wanted. skip this if the
|
||||
* default mask (allow all rates) is used to save some processing for
|
||||
* the common case.
|
||||
*/
|
||||
mask = sdata->rc_rateidx_mask[info->band];
|
||||
has_mcs_mask = sdata->rc_has_mcs_mask[info->band];
|
||||
rate_flags =
|
||||
ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
|
||||
for (i = 0; i < sband->n_bitrates; i++)
|
||||
if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
|
||||
mask &= ~BIT(i);
|
||||
|
||||
if (mask == (1 << sband->n_bitrates) - 1 && !has_mcs_mask)
|
||||
return;
|
||||
|
||||
if (has_mcs_mask)
|
||||
memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band],
|
||||
sizeof(mcs_mask));
|
||||
else
|
||||
memset(mcs_mask, 0xff, sizeof(mcs_mask));
|
||||
|
||||
if (sta) {
|
||||
/* Filter out rates that the STA does not support */
|
||||
mask &= sta->supp_rates[info->band];
|
||||
for (i = 0; i < sizeof(mcs_mask); i++)
|
||||
mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i];
|
||||
}
|
||||
|
||||
/*
|
||||
* Make sure the rate index selected for each TX rate is
|
||||
* included in the configured mask and change the rate indexes
|
||||
* if needed.
|
||||
*/
|
||||
chan_width = sdata->vif.bss_conf.chandef.width;
|
||||
for (i = 0; i < max_rates; i++) {
|
||||
/* Skip invalid rates */
|
||||
if (rates[i].idx < 0)
|
||||
break;
|
||||
|
||||
rate_idx_match_mask(&rates[i], sband, chan_width, mask,
|
||||
mcs_mask);
|
||||
}
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
||||
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
||||
struct ieee80211_supported_band *sband;
|
||||
|
||||
rate_control_fill_sta_table(sta, info, dest, max_rates);
|
||||
|
||||
if (!vif)
|
||||
return;
|
||||
|
||||
sdata = vif_to_sdata(vif);
|
||||
sband = sdata->local->hw.wiphy->bands[info->band];
|
||||
|
||||
if (ieee80211_is_data(hdr->frame_control))
|
||||
rate_control_apply_mask(sdata, sta, sband, info, dest, max_rates);
|
||||
|
||||
if (dest[0].idx < 0)
|
||||
__rate_control_send_low(&sdata->local->hw, sband, sta, info,
|
||||
sdata->rc_rateidx_mask[info->band]);
|
||||
|
||||
if (sta)
|
||||
rate_fixup_ratelist(vif, sband, info, dest, max_rates);
|
||||
}
|
||||
EXPORT_SYMBOL(ieee80211_get_tx_rates);
|
||||
|
||||
void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
|
||||
struct sta_info *sta,
|
||||
struct ieee80211_tx_rate_control *txrc)
|
||||
{
|
||||
struct rate_control_ref *ref = sdata->local->rate_ctrl;
|
||||
void *priv_sta = NULL;
|
||||
struct ieee80211_sta *ista = NULL;
|
||||
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(txrc->skb);
|
||||
int i;
|
||||
|
||||
if (sta && test_sta_flag(sta, WLAN_STA_RATE_CONTROL)) {
|
||||
ista = &sta->sta;
|
||||
priv_sta = sta->rate_ctrl_priv;
|
||||
}
|
||||
|
||||
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
|
||||
info->control.rates[i].idx = -1;
|
||||
info->control.rates[i].flags = 0;
|
||||
info->control.rates[i].count = 0;
|
||||
}
|
||||
|
||||
if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL)
|
||||
return;
|
||||
|
||||
ref->ops->get_rate(ref->priv, ista, priv_sta, txrc);
|
||||
|
||||
if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_RC_TABLE)
|
||||
return;
|
||||
|
||||
ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb,
|
||||
info->control.rates,
|
||||
ARRAY_SIZE(info->control.rates));
|
||||
}
|
||||
|
||||
int rate_control_set_rates(struct ieee80211_hw *hw,
|
||||
struct ieee80211_sta *pubsta,
|
||||
struct ieee80211_sta_rates *rates)
|
||||
{
|
||||
struct ieee80211_sta_rates *old;
|
||||
|
||||
/*
|
||||
* mac80211 guarantees that this function will not be called
|
||||
* concurrently, so the following RCU access is safe, even without
|
||||
* extra locking. This can not be checked easily, so we just set
|
||||
* the condition to true.
|
||||
*/
|
||||
old = rcu_dereference_protected(pubsta->rates, true);
|
||||
rcu_assign_pointer(pubsta->rates, rates);
|
||||
if (old)
|
||||
kfree_rcu(old, rcu_head);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(rate_control_set_rates);
|
||||
|
||||
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
|
||||
const char *name)
|
||||
{
|
||||
struct rate_control_ref *ref;
|
||||
|
||||
ASSERT_RTNL();
|
||||
|
||||
if (local->open_count)
|
||||
return -EBUSY;
|
||||
|
||||
if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) {
|
||||
if (WARN_ON(!local->ops->set_rts_threshold))
|
||||
return -EINVAL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
ref = rate_control_alloc(name, local);
|
||||
if (!ref) {
|
||||
wiphy_warn(local->hw.wiphy,
|
||||
"Failed to select rate control algorithm\n");
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
WARN_ON(local->rate_ctrl);
|
||||
local->rate_ctrl = ref;
|
||||
|
||||
wiphy_debug(local->hw.wiphy, "Selected rate control algorithm '%s'\n",
|
||||
ref->ops->name);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void rate_control_deinitialize(struct ieee80211_local *local)
|
||||
{
|
||||
struct rate_control_ref *ref;
|
||||
|
||||
ref = local->rate_ctrl;
|
||||
|
||||
if (!ref)
|
||||
return;
|
||||
|
||||
local->rate_ctrl = NULL;
|
||||
rate_control_free(ref);
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue