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mac80211.c
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// SPDX-License-Identifier: ISC
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*/
#include <linux/of.h>
#include "mt76.h"
#define CHAN2G(_idx, _freq) { \
.band = NL80211_BAND_2GHZ, \
.center_freq = (_freq), \
.hw_value = (_idx), \
.max_power = 30, \
}
#define CHAN5G(_idx, _freq) { \
.band = NL80211_BAND_5GHZ, \
.center_freq = (_freq), \
.hw_value = (_idx), \
.max_power = 30, \
}
static const struct ieee80211_channel mt76_channels_2ghz[] = {
CHAN2G(1, 2412),
CHAN2G(2, 2417),
CHAN2G(3, 2422),
CHAN2G(4, 2427),
CHAN2G(5, 2432),
CHAN2G(6, 2437),
CHAN2G(7, 2442),
CHAN2G(8, 2447),
CHAN2G(9, 2452),
CHAN2G(10, 2457),
CHAN2G(11, 2462),
CHAN2G(12, 2467),
CHAN2G(13, 2472),
CHAN2G(14, 2484),
};
static const struct ieee80211_channel mt76_channels_5ghz[] = {
CHAN5G(36, 5180),
CHAN5G(40, 5200),
CHAN5G(44, 5220),
CHAN5G(48, 5240),
CHAN5G(52, 5260),
CHAN5G(56, 5280),
CHAN5G(60, 5300),
CHAN5G(64, 5320),
CHAN5G(100, 5500),
CHAN5G(104, 5520),
CHAN5G(108, 5540),
CHAN5G(112, 5560),
CHAN5G(116, 5580),
CHAN5G(120, 5600),
CHAN5G(124, 5620),
CHAN5G(128, 5640),
CHAN5G(132, 5660),
CHAN5G(136, 5680),
CHAN5G(140, 5700),
CHAN5G(144, 5720),
CHAN5G(149, 5745),
CHAN5G(153, 5765),
CHAN5G(157, 5785),
CHAN5G(161, 5805),
CHAN5G(165, 5825),
CHAN5G(169, 5845),
CHAN5G(173, 5865),
CHAN5G(177, 5885),
};
static const struct ieee80211_tpt_blink mt76_tpt_blink[] = {
{ .throughput = 0 * 1024, .blink_time = 334 },
{ .throughput = 1 * 1024, .blink_time = 260 },
{ .throughput = 5 * 1024, .blink_time = 220 },
{ .throughput = 10 * 1024, .blink_time = 190 },
{ .throughput = 20 * 1024, .blink_time = 170 },
{ .throughput = 50 * 1024, .blink_time = 150 },
{ .throughput = 70 * 1024, .blink_time = 130 },
{ .throughput = 100 * 1024, .blink_time = 110 },
{ .throughput = 200 * 1024, .blink_time = 80 },
{ .throughput = 300 * 1024, .blink_time = 50 },
};
static int mt76_led_init(struct mt76_dev *dev)
{
struct device_node *np = dev->dev->of_node;
struct ieee80211_hw *hw = dev->hw;
int led_pin;
if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set)
return 0;
snprintf(dev->led_name, sizeof(dev->led_name),
"mt76-%s", wiphy_name(hw->wiphy));
dev->led_cdev.name = dev->led_name;
dev->led_cdev.default_trigger =
ieee80211_create_tpt_led_trigger(hw,
IEEE80211_TPT_LEDTRIG_FL_RADIO,
mt76_tpt_blink,
ARRAY_SIZE(mt76_tpt_blink));
np = of_get_child_by_name(np, "led");
if (np) {
if (!of_property_read_u32(np, "led-sources", &led_pin))
dev->led_pin = led_pin;
dev->led_al = of_property_read_bool(np, "led-active-low");
of_node_put(np);
}
return led_classdev_register(dev->dev, &dev->led_cdev);
}
static void mt76_led_cleanup(struct mt76_dev *dev)
{
if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set)
return;
led_classdev_unregister(&dev->led_cdev);
}
static void mt76_init_stream_cap(struct mt76_phy *phy,
struct ieee80211_supported_band *sband,
bool vht)
{
struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap;
int i, nstream = hweight8(phy->antenna_mask);
struct ieee80211_sta_vht_cap *vht_cap;
u16 mcs_map = 0;
if (nstream > 1)
ht_cap->cap |= IEEE80211_HT_CAP_TX_STBC;
else
ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
ht_cap->mcs.rx_mask[i] = i < nstream ? 0xff : 0;
if (!vht)
return;
vht_cap = &sband->vht_cap;
if (nstream > 1)
vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
else
vht_cap->cap &= ~IEEE80211_VHT_CAP_TXSTBC;
vht_cap->cap |= IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN;
for (i = 0; i < 8; i++) {
if (i < nstream)
mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2));
else
mcs_map |=
(IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2));
}
vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
}
void mt76_set_stream_caps(struct mt76_phy *phy, bool vht)
{
if (phy->dev->cap.has_2ghz)
mt76_init_stream_cap(phy, &phy->sband_2g.sband, false);
if (phy->dev->cap.has_5ghz)
mt76_init_stream_cap(phy, &phy->sband_5g.sband, vht);
}
EXPORT_SYMBOL_GPL(mt76_set_stream_caps);
static int
mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
const struct ieee80211_channel *chan, int n_chan,
struct ieee80211_rate *rates, int n_rates, bool vht)
{
struct ieee80211_supported_band *sband = &msband->sband;
struct ieee80211_sta_ht_cap *ht_cap;
struct ieee80211_sta_vht_cap *vht_cap;
void *chanlist;
int size;
size = n_chan * sizeof(*chan);
chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL);
if (!chanlist)
return -ENOMEM;
msband->chan = devm_kcalloc(dev->dev, n_chan, sizeof(*msband->chan),
GFP_KERNEL);
if (!msband->chan)
return -ENOMEM;
sband->channels = chanlist;
sband->n_channels = n_chan;
sband->bitrates = rates;
sband->n_bitrates = n_rates;
ht_cap = &sband->ht_cap;
ht_cap->ht_supported = true;
ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
IEEE80211_HT_CAP_GRN_FLD |
IEEE80211_HT_CAP_SGI_20 |
IEEE80211_HT_CAP_SGI_40 |
(1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
mt76_init_stream_cap(&dev->phy, sband, vht);
if (!vht)
return 0;
vht_cap = &sband->vht_cap;
vht_cap->vht_supported = true;
vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC |
IEEE80211_VHT_CAP_RXSTBC_1 |
IEEE80211_VHT_CAP_SHORT_GI_80 |
(3 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
return 0;
}
static int
mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates,
int n_rates)
{
dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->phy.sband_2g.sband;
return mt76_init_sband(dev, &dev->phy.sband_2g,
mt76_channels_2ghz,
ARRAY_SIZE(mt76_channels_2ghz),
rates, n_rates, false);
}
static int
mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates,
int n_rates, bool vht)
{
dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->phy.sband_5g.sband;
return mt76_init_sband(dev, &dev->phy.sband_5g,
mt76_channels_5ghz,
ARRAY_SIZE(mt76_channels_5ghz),
rates, n_rates, vht);
}
static void
mt76_check_sband(struct mt76_phy *phy, struct mt76_sband *msband,
enum nl80211_band band)
{
struct ieee80211_supported_band *sband = &msband->sband;
bool found = false;
int i;
if (!sband)
return;
for (i = 0; i < sband->n_channels; i++) {
if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED)
continue;
found = true;
break;
}
if (found) {
phy->chandef.chan = &sband->channels[0];
phy->chan_state = &msband->chan[0];
return;
}
sband->n_channels = 0;
phy->hw->wiphy->bands[band] = NULL;
}
static void
mt76_phy_init(struct mt76_dev *dev, struct ieee80211_hw *hw)
{
struct wiphy *wiphy = hw->wiphy;
SET_IEEE80211_DEV(hw, dev->dev);
SET_IEEE80211_PERM_ADDR(hw, dev->macaddr);
wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR |
NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE;
wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH |
WIPHY_FLAG_SUPPORTS_TDLS |
WIPHY_FLAG_AP_UAPSD;
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_AIRTIME_FAIRNESS);
wiphy->available_antennas_tx = dev->phy.antenna_mask;
wiphy->available_antennas_rx = dev->phy.antenna_mask;
hw->txq_data_size = sizeof(struct mt76_txq);
hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
if (!hw->max_tx_fragments)
hw->max_tx_fragments = 16;
ieee80211_hw_set(hw, SIGNAL_DBM);
ieee80211_hw_set(hw, AMPDU_AGGREGATION);
ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
if (!(dev->drv->drv_flags & MT_DRV_AMSDU_OFFLOAD) &&
hw->max_tx_fragments > 1) {
ieee80211_hw_set(hw, TX_AMSDU);
/* TODO: avoid linearization for SDIO */
if (!mt76_is_sdio(dev))
ieee80211_hw_set(hw, TX_FRAG_LIST);
}
ieee80211_hw_set(hw, MFP_CAPABLE);
ieee80211_hw_set(hw, AP_LINK_PS);
ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
wiphy->interface_modes =
BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_AP) |
#ifdef CONFIG_MAC80211_MESH
BIT(NL80211_IFTYPE_MESH_POINT) |
#endif
BIT(NL80211_IFTYPE_P2P_CLIENT) |
BIT(NL80211_IFTYPE_P2P_GO) |
BIT(NL80211_IFTYPE_ADHOC);
}
struct mt76_phy *
mt76_alloc_phy(struct mt76_dev *dev, unsigned int size,
const struct ieee80211_ops *ops)
{
struct ieee80211_hw *hw;
struct mt76_phy *phy;
unsigned int phy_size, chan_size;
unsigned int size_2g, size_5g;
void *priv;
phy_size = ALIGN(sizeof(*phy), 8);
chan_size = sizeof(dev->phy.sband_2g.chan[0]);
size_2g = ALIGN(ARRAY_SIZE(mt76_channels_2ghz) * chan_size, 8);
size_5g = ALIGN(ARRAY_SIZE(mt76_channels_5ghz) * chan_size, 8);
size += phy_size + size_2g + size_5g;
hw = ieee80211_alloc_hw(size, ops);
if (!hw)
return NULL;
phy = hw->priv;
phy->dev = dev;
phy->hw = hw;
mt76_phy_init(dev, hw);
priv = hw->priv + phy_size;
phy->sband_2g = dev->phy.sband_2g;
phy->sband_2g.chan = priv;
priv += size_2g;
phy->sband_5g = dev->phy.sband_5g;
phy->sband_5g.chan = priv;
priv += size_5g;
phy->priv = priv;
hw->wiphy->bands[NL80211_BAND_2GHZ] = &phy->sband_2g.sband;
hw->wiphy->bands[NL80211_BAND_5GHZ] = &phy->sband_5g.sband;
mt76_check_sband(phy, &phy->sband_2g, NL80211_BAND_2GHZ);
mt76_check_sband(phy, &phy->sband_5g, NL80211_BAND_5GHZ);
return phy;
}
EXPORT_SYMBOL_GPL(mt76_alloc_phy);
int
mt76_register_phy(struct mt76_phy *phy)
{
int ret;
ret = ieee80211_register_hw(phy->hw);
if (ret)
return ret;
phy->dev->phy2 = phy;
return 0;
}
EXPORT_SYMBOL_GPL(mt76_register_phy);
void
mt76_unregister_phy(struct mt76_phy *phy)
{
struct mt76_dev *dev = phy->dev;
mt76_tx_status_check(dev, NULL, true);
ieee80211_unregister_hw(phy->hw);
dev->phy2 = NULL;
}
EXPORT_SYMBOL_GPL(mt76_unregister_phy);
struct mt76_dev *
mt76_alloc_device(struct device *pdev, unsigned int size,
const struct ieee80211_ops *ops,
const struct mt76_driver_ops *drv_ops)
{
struct ieee80211_hw *hw;
struct mt76_phy *phy;
struct mt76_dev *dev;
int i;
hw = ieee80211_alloc_hw(size, ops);
if (!hw)
return NULL;
dev = hw->priv;
dev->hw = hw;
dev->dev = pdev;
dev->drv = drv_ops;
phy = &dev->phy;
phy->dev = dev;
phy->hw = hw;
spin_lock_init(&dev->rx_lock);
spin_lock_init(&dev->lock);
spin_lock_init(&dev->cc_lock);
mutex_init(&dev->mutex);
init_waitqueue_head(&dev->tx_wait);
skb_queue_head_init(&dev->status_list);
skb_queue_head_init(&dev->mcu.res_q);
init_waitqueue_head(&dev->mcu.wait);
mutex_init(&dev->mcu.mutex);
INIT_LIST_HEAD(&dev->txwi_cache);
for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++)
skb_queue_head_init(&dev->rx_skb[i]);
tasklet_init(&dev->tx_tasklet, mt76_tx_tasklet, (unsigned long)dev);
dev->wq = alloc_ordered_workqueue("mt76", 0);
if (!dev->wq) {
ieee80211_free_hw(hw);
return NULL;
}
return dev;
}
EXPORT_SYMBOL_GPL(mt76_alloc_device);
int mt76_register_device(struct mt76_dev *dev, bool vht,
struct ieee80211_rate *rates, int n_rates)
{
struct ieee80211_hw *hw = dev->hw;
struct mt76_phy *phy = &dev->phy;
int ret;
dev_set_drvdata(dev->dev, dev);
mt76_phy_init(dev, hw);
if (dev->cap.has_2ghz) {
ret = mt76_init_sband_2g(dev, rates, n_rates);
if (ret)
return ret;
}
if (dev->cap.has_5ghz) {
ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht);
if (ret)
return ret;
}
wiphy_read_of_freq_limits(hw->wiphy);
mt76_check_sband(&dev->phy, &phy->sband_2g, NL80211_BAND_2GHZ);
mt76_check_sband(&dev->phy, &phy->sband_5g, NL80211_BAND_5GHZ);
if (IS_ENABLED(CONFIG_MT76_LEDS)) {
ret = mt76_led_init(dev);
if (ret)
return ret;
}
return ieee80211_register_hw(hw);
}
EXPORT_SYMBOL_GPL(mt76_register_device);
void mt76_unregister_device(struct mt76_dev *dev)
{
struct ieee80211_hw *hw = dev->hw;
if (IS_ENABLED(CONFIG_MT76_LEDS))
mt76_led_cleanup(dev);
mt76_tx_status_check(dev, NULL, true);
ieee80211_unregister_hw(hw);
}
EXPORT_SYMBOL_GPL(mt76_unregister_device);
void mt76_free_device(struct mt76_dev *dev)
{
if (dev->wq) {
destroy_workqueue(dev->wq);
dev->wq = NULL;
}
if (mt76_is_mmio(dev))
mt76_tx_free(dev);
ieee80211_free_hw(dev->hw);
}
EXPORT_SYMBOL_GPL(mt76_free_device);
void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct mt76_phy *phy = mt76_dev_phy(dev, status->ext_phy);
if (!test_bit(MT76_STATE_RUNNING, &phy->state)) {
dev_kfree_skb(skb);
return;
}
#ifdef CONFIG_NL80211_TESTMODE
if (dev->test.state == MT76_TM_STATE_RX_FRAMES) {
dev->test.rx_stats.packets[q]++;
if (status->flag & RX_FLAG_FAILED_FCS_CRC)
dev->test.rx_stats.fcs_error[q]++;
}
#endif
__skb_queue_tail(&dev->rx_skb[q], skb);
}
EXPORT_SYMBOL_GPL(mt76_rx);
bool mt76_has_tx_pending(struct mt76_phy *phy)
{
struct mt76_dev *dev = phy->dev;
struct mt76_queue *q;
int i, offset;
offset = __MT_TXQ_MAX * (phy != &dev->phy);
for (i = 0; i < __MT_TXQ_MAX; i++) {
q = dev->q_tx[offset + i].q;
if (q && q->queued)
return true;
}
return false;
}
EXPORT_SYMBOL_GPL(mt76_has_tx_pending);
static struct mt76_channel_state *
mt76_channel_state(struct mt76_phy *phy, struct ieee80211_channel *c)
{
struct mt76_sband *msband;
int idx;
if (c->band == NL80211_BAND_2GHZ)
msband = &phy->sband_2g;
else
msband = &phy->sband_5g;
idx = c - &msband->sband.channels[0];
return &msband->chan[idx];
}
void mt76_update_survey_active_time(struct mt76_phy *phy, ktime_t time)
{
struct mt76_channel_state *state = phy->chan_state;
state->cc_active += ktime_to_us(ktime_sub(time,
phy->survey_time));
phy->survey_time = time;
}
EXPORT_SYMBOL_GPL(mt76_update_survey_active_time);
void mt76_update_survey(struct mt76_dev *dev)
{
ktime_t cur_time;
if (dev->drv->update_survey)
dev->drv->update_survey(dev);
cur_time = ktime_get_boottime();
mt76_update_survey_active_time(&dev->phy, cur_time);
if (dev->phy2)
mt76_update_survey_active_time(dev->phy2, cur_time);
if (dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME) {
struct mt76_channel_state *state = dev->phy.chan_state;
spin_lock_bh(&dev->cc_lock);
state->cc_bss_rx += dev->cur_cc_bss_rx;
dev->cur_cc_bss_rx = 0;
spin_unlock_bh(&dev->cc_lock);
}
}
EXPORT_SYMBOL_GPL(mt76_update_survey);
void mt76_set_channel(struct mt76_phy *phy)
{
struct mt76_dev *dev = phy->dev;
struct ieee80211_hw *hw = phy->hw;
struct cfg80211_chan_def *chandef = &hw->conf.chandef;
bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL;
int timeout = HZ / 5;
bool was_scanning = test_bit(MT76_SCANNING, &phy->state);
wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(phy), timeout);
mt76_update_survey(dev);
if (phy->chandef.chan->center_freq != chandef->chan->center_freq ||
phy->chandef.width != chandef->width)
phy->dfs_state = MT_DFS_STATE_UNKNOWN;
phy->chandef = *chandef;
phy->chan_state = mt76_channel_state(phy, chandef->chan);
if (!offchannel)
phy->main_chan = chandef->chan;
if (chandef->chan != phy->main_chan || was_scanning)
memset(phy->chan_state, 0, sizeof(*phy->chan_state));
}
EXPORT_SYMBOL_GPL(mt76_set_channel);
int mt76_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct mt76_phy *phy = hw->priv;
struct mt76_dev *dev = phy->dev;
struct mt76_sband *sband;
struct ieee80211_channel *chan;
struct mt76_channel_state *state;
int ret = 0;
mutex_lock(&dev->mutex);
if (idx == 0 && dev->drv->update_survey)
mt76_update_survey(dev);
sband = &phy->sband_2g;
if (idx >= sband->sband.n_channels) {
idx -= sband->sband.n_channels;
sband = &phy->sband_5g;
}
if (idx >= sband->sband.n_channels) {
ret = -ENOENT;
goto out;
}
chan = &sband->sband.channels[idx];
state = mt76_channel_state(phy, chan);
memset(survey, 0, sizeof(*survey));
survey->channel = chan;
survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY;
survey->filled |= dev->drv->survey_flags;
if (state->noise)
survey->filled |= SURVEY_INFO_NOISE_DBM;
if (chan == phy->main_chan) {
survey->filled |= SURVEY_INFO_IN_USE;
if (dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME)
survey->filled |= SURVEY_INFO_TIME_BSS_RX;
}
survey->time_busy = div_u64(state->cc_busy, 1000);
survey->time_rx = div_u64(state->cc_rx, 1000);
survey->time = div_u64(state->cc_active, 1000);
survey->noise = state->noise;
spin_lock_bh(&dev->cc_lock);
survey->time_bss_rx = div_u64(state->cc_bss_rx, 1000);
survey->time_tx = div_u64(state->cc_tx, 1000);
spin_unlock_bh(&dev->cc_lock);
out:
mutex_unlock(&dev->mutex);
return ret;
}
EXPORT_SYMBOL_GPL(mt76_get_survey);
void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid,
struct ieee80211_key_conf *key)
{
struct ieee80211_key_seq seq;
int i;
wcid->rx_check_pn = false;
if (!key)
return;
if (key->cipher != WLAN_CIPHER_SUITE_CCMP)
return;
wcid->rx_check_pn = true;
for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
ieee80211_get_key_rx_seq(key, i, &seq);
memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn));
}
}
EXPORT_SYMBOL(mt76_wcid_key_setup);
static int
mt76_rx_signal(struct mt76_rx_status *status)
{
s8 *chain_signal = status->chain_signal;
int signal = -128;
u8 chains;
for (chains = status->chains; chains; chains >>= 1, chain_signal++) {
int cur, diff;
cur = *chain_signal;
if (!(chains & BIT(0)) ||
cur > 0)
continue;
if (cur > signal)
swap(cur, signal);
diff = signal - cur;
if (diff == 0)
signal += 3;
else if (diff <= 2)
signal += 2;
else if (diff <= 6)
signal += 1;
}
return signal;
}
static void
mt76_rx_convert(struct mt76_dev *dev, struct sk_buff *skb,
struct ieee80211_hw **hw,
struct ieee80211_sta **sta)
{
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
struct ieee80211_hdr *hdr = mt76_skb_get_hdr(skb);
struct mt76_rx_status mstat;
mstat = *((struct mt76_rx_status *)skb->cb);
memset(status, 0, sizeof(*status));
status->flag = mstat.flag;
status->freq = mstat.freq;
status->enc_flags = mstat.enc_flags;
status->encoding = mstat.encoding;
status->bw = mstat.bw;
status->he_ru = mstat.he_ru;
status->he_gi = mstat.he_gi;
status->he_dcm = mstat.he_dcm;
status->rate_idx = mstat.rate_idx;
status->nss = mstat.nss;
status->band = mstat.band;
status->signal = mstat.signal;
status->chains = mstat.chains;
status->ampdu_reference = mstat.ampdu_ref;
status->signal = mt76_rx_signal(&mstat);
if (status->signal <= -128)
status->flag |= RX_FLAG_NO_SIGNAL_VAL;
if (ieee80211_is_beacon(hdr->frame_control) ||
ieee80211_is_probe_resp(hdr->frame_control))
status->boottime_ns = ktime_to_ns(ktime_get_boottime());
BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb));
BUILD_BUG_ON(sizeof(status->chain_signal) !=
sizeof(mstat.chain_signal));
memcpy(status->chain_signal, mstat.chain_signal,
sizeof(mstat.chain_signal));
*sta = wcid_to_sta(mstat.wcid);
*hw = mt76_phy_hw(dev, mstat.ext_phy);
}
static int
mt76_check_ccmp_pn(struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct mt76_wcid *wcid = status->wcid;
struct ieee80211_hdr *hdr;
int ret;
if (!(status->flag & RX_FLAG_DECRYPTED))
return 0;
if (status->flag & RX_FLAG_ONLY_MONITOR)
return 0;
if (!wcid || !wcid->rx_check_pn)
return 0;
if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
/*
* Validate the first fragment both here and in mac80211
* All further fragments will be validated by mac80211 only.
*/
hdr = mt76_skb_get_hdr(skb);
if (ieee80211_is_frag(hdr) &&
!ieee80211_is_first_frag(hdr->frame_control))
return 0;
}
BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0]));
ret = memcmp(status->iv, wcid->rx_key_pn[status->tid],
sizeof(status->iv));
if (ret <= 0)
return -EINVAL; /* replay */
memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv));
if (status->flag & RX_FLAG_IV_STRIPPED)
status->flag |= RX_FLAG_PN_VALIDATED;
return 0;
}
static void
mt76_airtime_report(struct mt76_dev *dev, struct mt76_rx_status *status,
int len)
{
struct mt76_wcid *wcid = status->wcid;
struct ieee80211_sta *sta;
u32 airtime;
airtime = mt76_calc_rx_airtime(dev, status, len);
spin_lock(&dev->cc_lock);
dev->cur_cc_bss_rx += airtime;
spin_unlock(&dev->cc_lock);
if (!wcid || !wcid->sta)
return;
sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv);
ieee80211_sta_register_airtime(sta, status->tid, 0, airtime);
}
static void
mt76_airtime_flush_ampdu(struct mt76_dev *dev)
{
struct mt76_wcid *wcid;
int wcid_idx;
if (!dev->rx_ampdu_len)
return;
wcid_idx = dev->rx_ampdu_status.wcid_idx;
if (wcid_idx < ARRAY_SIZE(dev->wcid))
wcid = rcu_dereference(dev->wcid[wcid_idx]);
else
wcid = NULL;
dev->rx_ampdu_status.wcid = wcid;
mt76_airtime_report(dev, &dev->rx_ampdu_status, dev->rx_ampdu_len);
dev->rx_ampdu_len = 0;
dev->rx_ampdu_ref = 0;
}
static void
mt76_airtime_check(struct mt76_dev *dev, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr = mt76_skb_get_hdr(skb);
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct mt76_wcid *wcid = status->wcid;
if (!(dev->drv->drv_flags & MT_DRV_SW_RX_AIRTIME))
return;
if (!wcid || !wcid->sta) {
if (!ether_addr_equal(hdr->addr1, dev->macaddr))
return;
wcid = NULL;
}
if (!(status->flag & RX_FLAG_AMPDU_DETAILS) ||
status->ampdu_ref != dev->rx_ampdu_ref)
mt76_airtime_flush_ampdu(dev);
if (status->flag & RX_FLAG_AMPDU_DETAILS) {
if (!dev->rx_ampdu_len ||
status->ampdu_ref != dev->rx_ampdu_ref) {
dev->rx_ampdu_status = *status;
dev->rx_ampdu_status.wcid_idx = wcid ? wcid->idx : 0xff;
dev->rx_ampdu_ref = status->ampdu_ref;
}
dev->rx_ampdu_len += skb->len;
return;
}
mt76_airtime_report(dev, status, skb->len);
}
static void
mt76_check_sta(struct mt76_dev *dev, struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct ieee80211_hdr *hdr = mt76_skb_get_hdr(skb);
struct ieee80211_sta *sta;
struct ieee80211_hw *hw;
struct mt76_wcid *wcid = status->wcid;
bool ps;
int i;
hw = mt76_phy_hw(dev, status->ext_phy);
if (ieee80211_is_pspoll(hdr->frame_control) && !wcid) {
sta = ieee80211_find_sta_by_ifaddr(hw, hdr->addr2, NULL);
if (sta)
wcid = status->wcid = (struct mt76_wcid *)sta->drv_priv;
}
mt76_airtime_check(dev, skb);
if (!wcid || !wcid->sta)
return;
sta = container_of((void *)wcid, struct ieee80211_sta, drv_priv);
if (status->signal <= 0)
ewma_signal_add(&wcid->rssi, -status->signal);
wcid->inactive_count = 0;
if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags))
return;
if (ieee80211_is_pspoll(hdr->frame_control)) {
ieee80211_sta_pspoll(sta);
return;
}
if (ieee80211_has_morefrags(hdr->frame_control) ||
!(ieee80211_is_mgmt(hdr->frame_control) ||
ieee80211_is_data(hdr->frame_control)))
return;
ps = ieee80211_has_pm(hdr->frame_control);
if (ps && (ieee80211_is_data_qos(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control)))
ieee80211_sta_uapsd_trigger(sta, status->tid);
if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps)
return;
if (ps)
set_bit(MT_WCID_FLAG_PS, &wcid->flags);
else
clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
dev->drv->sta_ps(dev, sta, ps);
ieee80211_sta_ps_transition(sta, ps);
if (ps)
return;
for (i = 0; i < ARRAY_SIZE(sta->txq); i++) {
struct mt76_txq *mtxq;
if (!sta->txq[i])
continue;
mtxq = (struct mt76_txq *)sta->txq[i]->drv_priv;
if (!skb_queue_empty(&mtxq->retry_q))
ieee80211_schedule_txq(hw, sta->txq[i]);
}
}
void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
struct napi_struct *napi)
{
struct ieee80211_sta *sta;
struct ieee80211_hw *hw;
struct sk_buff *skb;
spin_lock(&dev->rx_lock);
while ((skb = __skb_dequeue(frames)) != NULL) {
if (mt76_check_ccmp_pn(skb)) {
dev_kfree_skb(skb);
continue;
}
mt76_rx_convert(dev, skb, &hw, &sta);
ieee80211_rx_napi(hw, sta, skb, napi);
}
spin_unlock(&dev->rx_lock);