630 lines
16 KiB
C
630 lines
16 KiB
C
/*
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* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <linux/of.h>
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#include "mt76.h"
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#define CHAN2G(_idx, _freq) { \
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.band = NL80211_BAND_2GHZ, \
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.center_freq = (_freq), \
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.hw_value = (_idx), \
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.max_power = 30, \
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}
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#define CHAN5G(_idx, _freq) { \
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.band = NL80211_BAND_5GHZ, \
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.center_freq = (_freq), \
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.hw_value = (_idx), \
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.max_power = 30, \
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}
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static const struct ieee80211_channel mt76_channels_2ghz[] = {
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CHAN2G(1, 2412),
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CHAN2G(2, 2417),
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CHAN2G(3, 2422),
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CHAN2G(4, 2427),
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CHAN2G(5, 2432),
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CHAN2G(6, 2437),
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CHAN2G(7, 2442),
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CHAN2G(8, 2447),
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CHAN2G(9, 2452),
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CHAN2G(10, 2457),
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CHAN2G(11, 2462),
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CHAN2G(12, 2467),
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CHAN2G(13, 2472),
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CHAN2G(14, 2484),
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};
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static const struct ieee80211_channel mt76_channels_5ghz[] = {
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CHAN5G(36, 5180),
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CHAN5G(40, 5200),
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CHAN5G(44, 5220),
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CHAN5G(48, 5240),
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CHAN5G(52, 5260),
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CHAN5G(56, 5280),
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CHAN5G(60, 5300),
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CHAN5G(64, 5320),
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CHAN5G(100, 5500),
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CHAN5G(104, 5520),
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CHAN5G(108, 5540),
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CHAN5G(112, 5560),
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CHAN5G(116, 5580),
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CHAN5G(120, 5600),
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CHAN5G(124, 5620),
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CHAN5G(128, 5640),
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CHAN5G(132, 5660),
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CHAN5G(136, 5680),
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CHAN5G(140, 5700),
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CHAN5G(149, 5745),
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CHAN5G(153, 5765),
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CHAN5G(157, 5785),
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CHAN5G(161, 5805),
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CHAN5G(165, 5825),
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};
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static const struct ieee80211_tpt_blink mt76_tpt_blink[] = {
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{ .throughput = 0 * 1024, .blink_time = 334 },
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{ .throughput = 1 * 1024, .blink_time = 260 },
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{ .throughput = 5 * 1024, .blink_time = 220 },
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{ .throughput = 10 * 1024, .blink_time = 190 },
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{ .throughput = 20 * 1024, .blink_time = 170 },
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{ .throughput = 50 * 1024, .blink_time = 150 },
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{ .throughput = 70 * 1024, .blink_time = 130 },
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{ .throughput = 100 * 1024, .blink_time = 110 },
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{ .throughput = 200 * 1024, .blink_time = 80 },
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{ .throughput = 300 * 1024, .blink_time = 50 },
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};
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static int mt76_led_init(struct mt76_dev *dev)
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{
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struct device_node *np = dev->dev->of_node;
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struct ieee80211_hw *hw = dev->hw;
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int led_pin;
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if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set)
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return 0;
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snprintf(dev->led_name, sizeof(dev->led_name),
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"mt76-%s", wiphy_name(hw->wiphy));
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dev->led_cdev.name = dev->led_name;
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dev->led_cdev.default_trigger =
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ieee80211_create_tpt_led_trigger(hw,
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IEEE80211_TPT_LEDTRIG_FL_RADIO,
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mt76_tpt_blink,
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ARRAY_SIZE(mt76_tpt_blink));
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np = of_get_child_by_name(np, "led");
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if (np) {
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if (!of_property_read_u32(np, "led-sources", &led_pin))
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dev->led_pin = led_pin;
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dev->led_al = of_property_read_bool(np, "led-active-low");
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}
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return devm_led_classdev_register(dev->dev, &dev->led_cdev);
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}
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static void mt76_init_stream_cap(struct mt76_dev *dev,
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struct ieee80211_supported_band *sband,
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bool vht)
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{
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struct ieee80211_sta_ht_cap *ht_cap = &sband->ht_cap;
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int i, nstream = __sw_hweight8(dev->antenna_mask);
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struct ieee80211_sta_vht_cap *vht_cap;
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u16 mcs_map = 0;
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if (nstream > 1)
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ht_cap->cap |= IEEE80211_HT_CAP_TX_STBC;
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else
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ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
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for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
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ht_cap->mcs.rx_mask[i] = i < nstream ? 0xff : 0;
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if (!vht)
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return;
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vht_cap = &sband->vht_cap;
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if (nstream > 1)
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vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;
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else
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vht_cap->cap &= ~IEEE80211_VHT_CAP_TXSTBC;
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for (i = 0; i < 8; i++) {
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if (i < nstream)
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mcs_map |= (IEEE80211_VHT_MCS_SUPPORT_0_9 << (i * 2));
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else
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mcs_map |=
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(IEEE80211_VHT_MCS_NOT_SUPPORTED << (i * 2));
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}
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vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
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vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
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}
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void mt76_set_stream_caps(struct mt76_dev *dev, bool vht)
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{
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if (dev->cap.has_2ghz)
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mt76_init_stream_cap(dev, &dev->sband_2g.sband, false);
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if (dev->cap.has_5ghz)
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mt76_init_stream_cap(dev, &dev->sband_5g.sband, vht);
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}
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EXPORT_SYMBOL_GPL(mt76_set_stream_caps);
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static int
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mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
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const struct ieee80211_channel *chan, int n_chan,
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struct ieee80211_rate *rates, int n_rates, bool vht)
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{
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struct ieee80211_supported_band *sband = &msband->sband;
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struct ieee80211_sta_ht_cap *ht_cap;
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struct ieee80211_sta_vht_cap *vht_cap;
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void *chanlist;
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int size;
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size = n_chan * sizeof(*chan);
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chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL);
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if (!chanlist)
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return -ENOMEM;
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msband->chan = devm_kcalloc(dev->dev, n_chan, sizeof(*msband->chan),
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GFP_KERNEL);
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if (!msband->chan)
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return -ENOMEM;
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sband->channels = chanlist;
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sband->n_channels = n_chan;
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sband->bitrates = rates;
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sband->n_bitrates = n_rates;
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dev->chandef.chan = &sband->channels[0];
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ht_cap = &sband->ht_cap;
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ht_cap->ht_supported = true;
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ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
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IEEE80211_HT_CAP_GRN_FLD |
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IEEE80211_HT_CAP_SGI_20 |
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IEEE80211_HT_CAP_SGI_40 |
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(1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
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ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
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ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
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ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
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mt76_init_stream_cap(dev, sband, vht);
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if (!vht)
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return 0;
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vht_cap = &sband->vht_cap;
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vht_cap->vht_supported = true;
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vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC |
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IEEE80211_VHT_CAP_RXSTBC_1 |
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IEEE80211_VHT_CAP_SHORT_GI_80 |
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(3 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT);
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return 0;
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}
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static int
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mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates,
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int n_rates)
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{
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dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->sband_2g.sband;
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return mt76_init_sband(dev, &dev->sband_2g,
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mt76_channels_2ghz,
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ARRAY_SIZE(mt76_channels_2ghz),
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rates, n_rates, false);
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}
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static int
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mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates,
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int n_rates, bool vht)
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{
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dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->sband_5g.sband;
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return mt76_init_sband(dev, &dev->sband_5g,
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mt76_channels_5ghz,
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ARRAY_SIZE(mt76_channels_5ghz),
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rates, n_rates, vht);
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}
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static void
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mt76_check_sband(struct mt76_dev *dev, int band)
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{
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struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band];
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bool found = false;
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int i;
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if (!sband)
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return;
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for (i = 0; i < sband->n_channels; i++) {
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if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED)
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continue;
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found = true;
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break;
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}
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if (found)
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return;
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sband->n_channels = 0;
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dev->hw->wiphy->bands[band] = NULL;
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}
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struct mt76_dev *
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mt76_alloc_device(unsigned int size, const struct ieee80211_ops *ops)
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{
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struct ieee80211_hw *hw;
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struct mt76_dev *dev;
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hw = ieee80211_alloc_hw(size, ops);
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if (!hw)
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return NULL;
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dev = hw->priv;
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dev->hw = hw;
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spin_lock_init(&dev->rx_lock);
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spin_lock_init(&dev->lock);
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spin_lock_init(&dev->cc_lock);
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init_waitqueue_head(&dev->tx_wait);
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return dev;
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}
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EXPORT_SYMBOL_GPL(mt76_alloc_device);
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int mt76_register_device(struct mt76_dev *dev, bool vht,
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struct ieee80211_rate *rates, int n_rates)
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{
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struct ieee80211_hw *hw = dev->hw;
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struct wiphy *wiphy = hw->wiphy;
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int ret;
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dev_set_drvdata(dev->dev, dev);
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INIT_LIST_HEAD(&dev->txwi_cache);
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SET_IEEE80211_DEV(hw, dev->dev);
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SET_IEEE80211_PERM_ADDR(hw, dev->macaddr);
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wiphy->interface_modes =
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BIT(NL80211_IFTYPE_STATION) |
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BIT(NL80211_IFTYPE_AP) |
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#ifdef CONFIG_MAC80211_MESH
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BIT(NL80211_IFTYPE_MESH_POINT) |
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#endif
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BIT(NL80211_IFTYPE_ADHOC);
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wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;
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wiphy->available_antennas_tx = dev->antenna_mask;
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wiphy->available_antennas_rx = dev->antenna_mask;
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hw->txq_data_size = sizeof(struct mt76_txq);
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hw->max_tx_fragments = 16;
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ieee80211_hw_set(hw, SIGNAL_DBM);
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ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
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ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
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ieee80211_hw_set(hw, AMPDU_AGGREGATION);
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ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
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ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
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ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
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ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
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ieee80211_hw_set(hw, TX_AMSDU);
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ieee80211_hw_set(hw, TX_FRAG_LIST);
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ieee80211_hw_set(hw, MFP_CAPABLE);
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ieee80211_hw_set(hw, AP_LINK_PS);
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wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
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if (dev->cap.has_2ghz) {
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ret = mt76_init_sband_2g(dev, rates, n_rates);
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if (ret)
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return ret;
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}
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if (dev->cap.has_5ghz) {
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ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht);
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if (ret)
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return ret;
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}
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wiphy_read_of_freq_limits(dev->hw->wiphy);
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mt76_check_sband(dev, NL80211_BAND_2GHZ);
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mt76_check_sband(dev, NL80211_BAND_5GHZ);
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ret = mt76_led_init(dev);
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if (ret)
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return ret;
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return ieee80211_register_hw(hw);
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}
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EXPORT_SYMBOL_GPL(mt76_register_device);
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void mt76_unregister_device(struct mt76_dev *dev)
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{
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struct ieee80211_hw *hw = dev->hw;
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ieee80211_unregister_hw(hw);
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mt76_tx_free(dev);
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}
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EXPORT_SYMBOL_GPL(mt76_unregister_device);
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void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
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{
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if (!test_bit(MT76_STATE_RUNNING, &dev->state)) {
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dev_kfree_skb(skb);
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return;
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}
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__skb_queue_tail(&dev->rx_skb[q], skb);
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}
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EXPORT_SYMBOL_GPL(mt76_rx);
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static bool mt76_has_tx_pending(struct mt76_dev *dev)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) {
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if (dev->q_tx[i].queued)
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return true;
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}
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return false;
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}
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void mt76_set_channel(struct mt76_dev *dev)
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{
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struct ieee80211_hw *hw = dev->hw;
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struct cfg80211_chan_def *chandef = &hw->conf.chandef;
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struct mt76_channel_state *state;
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bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL;
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int timeout = HZ / 5;
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if (offchannel)
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set_bit(MT76_OFFCHANNEL, &dev->state);
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else
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clear_bit(MT76_OFFCHANNEL, &dev->state);
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wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(dev), timeout);
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if (dev->drv->update_survey)
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dev->drv->update_survey(dev);
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dev->chandef = *chandef;
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if (!offchannel)
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dev->main_chan = chandef->chan;
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if (chandef->chan != dev->main_chan) {
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state = mt76_channel_state(dev, chandef->chan);
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memset(state, 0, sizeof(*state));
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}
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}
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EXPORT_SYMBOL_GPL(mt76_set_channel);
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int mt76_get_survey(struct ieee80211_hw *hw, int idx,
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struct survey_info *survey)
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{
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struct mt76_dev *dev = hw->priv;
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struct mt76_sband *sband;
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struct ieee80211_channel *chan;
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struct mt76_channel_state *state;
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int ret = 0;
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if (idx == 0 && dev->drv->update_survey)
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dev->drv->update_survey(dev);
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sband = &dev->sband_2g;
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if (idx >= sband->sband.n_channels) {
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idx -= sband->sband.n_channels;
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sband = &dev->sband_5g;
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}
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if (idx >= sband->sband.n_channels)
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return -ENOENT;
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chan = &sband->sband.channels[idx];
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state = mt76_channel_state(dev, chan);
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memset(survey, 0, sizeof(*survey));
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survey->channel = chan;
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survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY;
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if (chan == dev->main_chan)
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survey->filled |= SURVEY_INFO_IN_USE;
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spin_lock_bh(&dev->cc_lock);
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survey->time = div_u64(state->cc_active, 1000);
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survey->time_busy = div_u64(state->cc_busy, 1000);
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spin_unlock_bh(&dev->cc_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(mt76_get_survey);
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void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid,
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struct ieee80211_key_conf *key)
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{
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struct ieee80211_key_seq seq;
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int i;
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wcid->rx_check_pn = false;
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if (!key)
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return;
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if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
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wcid->rx_check_pn = true;
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for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
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ieee80211_get_key_rx_seq(key, i, &seq);
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memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn));
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}
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|
}
|
|
EXPORT_SYMBOL(mt76_wcid_key_setup);
|
|
|
|
static struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb)
|
|
{
|
|
struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(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->rate_idx = mstat.rate_idx;
|
|
status->nss = mstat.nss;
|
|
status->band = mstat.band;
|
|
status->signal = mstat.signal;
|
|
status->chains = mstat.chains;
|
|
|
|
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));
|
|
|
|
return wcid_to_sta(mstat.wcid);
|
|
}
|
|
|
|
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 (!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 = (struct ieee80211_hdr *) skb->data;
|
|
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_check_ps(struct mt76_dev *dev, struct sk_buff *skb)
|
|
{
|
|
struct mt76_rx_status *status = (struct mt76_rx_status *) skb->cb;
|
|
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
|
|
struct ieee80211_sta *sta;
|
|
struct mt76_wcid *wcid = status->wcid;
|
|
bool ps;
|
|
|
|
if (!wcid || !wcid->sta)
|
|
return;
|
|
|
|
sta = container_of((void *) wcid, struct ieee80211_sta, drv_priv);
|
|
|
|
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);
|
|
}
|
|
|
|
void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
|
|
int queue)
|
|
{
|
|
struct napi_struct *napi = NULL;
|
|
struct ieee80211_sta *sta;
|
|
struct sk_buff *skb;
|
|
|
|
if (queue >= 0)
|
|
napi = &dev->napi[queue];
|
|
|
|
spin_lock(&dev->rx_lock);
|
|
while ((skb = __skb_dequeue(frames)) != NULL) {
|
|
if (mt76_check_ccmp_pn(skb)) {
|
|
dev_kfree_skb(skb);
|
|
continue;
|
|
}
|
|
|
|
sta = mt76_rx_convert(skb);
|
|
ieee80211_rx_napi(dev->hw, sta, skb, napi);
|
|
}
|
|
spin_unlock(&dev->rx_lock);
|
|
}
|
|
|
|
void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q)
|
|
{
|
|
struct sk_buff_head frames;
|
|
struct sk_buff *skb;
|
|
|
|
__skb_queue_head_init(&frames);
|
|
|
|
while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) {
|
|
mt76_check_ps(dev, skb);
|
|
mt76_rx_aggr_reorder(skb, &frames);
|
|
}
|
|
|
|
mt76_rx_complete(dev, &frames, q);
|
|
}
|