[thirdparty/kernel/stable.git] / drivers / net / wireless / mediatek / mt76 / mac80211.c

/*
 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#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(149, 5745),
	CHAN5G(153, 5765),
	CHAN5G(157, 5785),
	CHAN5G(161, 5805),
	CHAN5G(165, 5825),
};

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");
	}

	return devm_led_classdev_register(dev->dev, &dev->led_cdev);
}

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;
	u16 mcs_map;
	int size;

	size = n_chan * sizeof(*chan);
	chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL);
	if (!chanlist)
		return -ENOMEM;

	msband->chan = devm_kzalloc(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;
	dev->chandef.chan = &sband->channels[0];

	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 |
		       IEEE80211_HT_CAP_TX_STBC |
		       (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);

	ht_cap->mcs.rx_mask[0] = 0xff;
	ht_cap->mcs.rx_mask[1] = 0xff;
	ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
	ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
	ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;

	if (!vht)
		return 0;

	vht_cap = &sband->vht_cap;
	vht_cap->vht_supported = true;

	mcs_map = (IEEE80211_VHT_MCS_SUPPORT_0_9 << (0 * 2)) |
		  (IEEE80211_VHT_MCS_SUPPORT_0_9 << (1 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (2 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (3 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (4 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (5 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (6 * 2)) |
		  (IEEE80211_VHT_MCS_NOT_SUPPORTED << (7 * 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);
	vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC |
			IEEE80211_VHT_CAP_TXSTBC |
			IEEE80211_VHT_CAP_RXSTBC_1 |
			IEEE80211_VHT_CAP_SHORT_GI_80;

	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->sband_2g.sband;

	return mt76_init_sband(dev, &dev->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->sband_5g.sband;

	return mt76_init_sband(dev, &dev->sband_5g,
			       mt76_channels_5ghz,
			       ARRAY_SIZE(mt76_channels_5ghz),
			       rates, n_rates, vht);
}

static void
mt76_check_sband(struct mt76_dev *dev, int band)
{
	struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band];
	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)
		return;

	sband->n_channels = 0;
	dev->hw->wiphy->bands[band] = NULL;
}

int mt76_register_device(struct mt76_dev *dev, bool vht,
			 struct ieee80211_rate *rates, int n_rates)
{
	struct ieee80211_hw *hw = dev->hw;
	struct wiphy *wiphy = hw->wiphy;
	int ret;

	dev_set_drvdata(dev->dev, dev);

	spin_lock_init(&dev->lock);
	spin_lock_init(&dev->cc_lock);
	INIT_LIST_HEAD(&dev->txwi_cache);

	SET_IEEE80211_DEV(hw, dev->dev);
	SET_IEEE80211_PERM_ADDR(hw, dev->macaddr);

	wiphy->interface_modes =
		BIT(NL80211_IFTYPE_STATION) |
		BIT(NL80211_IFTYPE_AP) |
#ifdef CONFIG_MAC80211_MESH
		BIT(NL80211_IFTYPE_MESH_POINT) |
#endif
		BIT(NL80211_IFTYPE_ADHOC);

	wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR;

	wiphy->available_antennas_tx = dev->antenna_mask;
	wiphy->available_antennas_rx = dev->antenna_mask;

	hw->txq_data_size = sizeof(struct mt76_txq);
	hw->max_tx_fragments = 16;

	ieee80211_hw_set(hw, SIGNAL_DBM);
	ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
	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);
	ieee80211_hw_set(hw, TX_AMSDU);
	ieee80211_hw_set(hw, TX_FRAG_LIST);
	ieee80211_hw_set(hw, MFP_CAPABLE);
	ieee80211_hw_set(hw, AP_LINK_PS);

	wiphy->flags |= WIPHY_FLAG_IBSS_RSN;

	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(dev->hw->wiphy);
	mt76_check_sband(dev, NL80211_BAND_2GHZ);
	mt76_check_sband(dev, NL80211_BAND_5GHZ);

	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;

	ieee80211_unregister_hw(hw);
	mt76_tx_free(dev);
}
EXPORT_SYMBOL_GPL(mt76_unregister_device);

void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb)
{
	if (!test_bit(MT76_STATE_RUNNING, &dev->state)) {
		dev_kfree_skb(skb);
		return;
	}

	__skb_queue_tail(&dev->rx_skb[q], skb);
}
EXPORT_SYMBOL_GPL(mt76_rx);

void mt76_set_channel(struct mt76_dev *dev)
{
	struct ieee80211_hw *hw = dev->hw;
	struct cfg80211_chan_def *chandef = &hw->conf.chandef;
	struct mt76_channel_state *state;
	bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL;

	if (dev->drv->update_survey)
		dev->drv->update_survey(dev);

	dev->chandef = *chandef;

	if (!offchannel)
		dev->main_chan = chandef->chan;

	if (chandef->chan != dev->main_chan) {
		state = mt76_channel_state(dev, chandef->chan);
		memset(state, 0, sizeof(*state));
	}
}
EXPORT_SYMBOL_GPL(mt76_set_channel);

int mt76_get_survey(struct ieee80211_hw *hw, int idx,
		    struct survey_info *survey)
{
	struct mt76_dev *dev = hw->priv;
	struct mt76_sband *sband;
	struct ieee80211_channel *chan;
	struct mt76_channel_state *state;
	int ret = 0;

	if (idx == 0 && dev->drv->update_survey)
		dev->drv->update_survey(dev);

	sband = &dev->sband_2g;
	if (idx >= sband->sband.n_channels) {
		idx -= sband->sband.n_channels;
		sband = &dev->sband_5g;
	}

	if (idx >= sband->sband.n_channels)
		return -ENOENT;

	chan = &sband->sband.channels[idx];
	state = mt76_channel_state(dev, chan);

	memset(survey, 0, sizeof(*survey));
	survey->channel = chan;
	survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY;
	if (chan == dev->main_chan)
		survey->filled |= SURVEY_INFO_IN_USE;

	spin_lock_bh(&dev->cc_lock);
	survey->time = div_u64(state->cc_active, 1000);
	survey->time_busy = div_u64(state->cc_busy, 1000);
	spin_unlock_bh(&dev->cc_lock);

	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)
		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 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);
		mt76_stop_tx_queues(dev, sta, true);
	} else {
		clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
	}

	ieee80211_sta_ps_transition(sta, ps);
	dev->drv->sta_ps(dev, 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];

	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);
	}
}

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);
}
Commit	Line	Data
17f1de56 FF	1	/*
	2	* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16	#include <linux/of.h>
	17	#include "mt76.h"
	18
	19	#define CHAN2G(_idx, _freq) { \
	20	.band = NL80211_BAND_2GHZ, \
	21	.center_freq = (_freq), \
	22	.hw_value = (_idx), \
	23	.max_power = 30, \
	24	}
	25
	26	#define CHAN5G(_idx, _freq) { \
	27	.band = NL80211_BAND_5GHZ, \
	28	.center_freq = (_freq), \
	29	.hw_value = (_idx), \
	30	.max_power = 30, \
	31	}
	32
	33	static const struct ieee80211_channel mt76_channels_2ghz[] = {
	34	CHAN2G(1, 2412),
	35	CHAN2G(2, 2417),
	36	CHAN2G(3, 2422),
	37	CHAN2G(4, 2427),
	38	CHAN2G(5, 2432),
	39	CHAN2G(6, 2437),
	40	CHAN2G(7, 2442),
	41	CHAN2G(8, 2447),
	42	CHAN2G(9, 2452),
	43	CHAN2G(10, 2457),
	44	CHAN2G(11, 2462),
	45	CHAN2G(12, 2467),
	46	CHAN2G(13, 2472),
	47	CHAN2G(14, 2484),
	48	};
	49
	50	static const struct ieee80211_channel mt76_channels_5ghz[] = {
	51	CHAN5G(36, 5180),
	52	CHAN5G(40, 5200),
	53	CHAN5G(44, 5220),
	54	CHAN5G(48, 5240),
	55
	56	CHAN5G(52, 5260),
	57	CHAN5G(56, 5280),
	58	CHAN5G(60, 5300),
	59	CHAN5G(64, 5320),
	60
	61	CHAN5G(100, 5500),
	62	CHAN5G(104, 5520),
	63	CHAN5G(108, 5540),
	64	CHAN5G(112, 5560),
65	CHAN5G(116, 5580),
66	CHAN5G(120, 5600),
67	CHAN5G(124, 5620),
68	CHAN5G(128, 5640),
69	CHAN5G(132, 5660),
70	CHAN5G(136, 5680),
71	CHAN5G(140, 5700),
72
73	CHAN5G(149, 5745),
74	CHAN5G(153, 5765),
75	CHAN5G(157, 5785),
76	CHAN5G(161, 5805),
77	CHAN5G(165, 5825),
78	};
79
80	static const struct ieee80211_tpt_blink mt76_tpt_blink[] = {
81	{ .throughput = 0 * 1024, .blink_time = 334 },
82	{ .throughput = 1 * 1024, .blink_time = 260 },
83	{ .throughput = 5 * 1024, .blink_time = 220 },
84	{ .throughput = 10 * 1024, .blink_time = 190 },
85	{ .throughput = 20 * 1024, .blink_time = 170 },
86	{ .throughput = 50 * 1024, .blink_time = 150 },
87	{ .throughput = 70 * 1024, .blink_time = 130 },
88	{ .throughput = 100 * 1024, .blink_time = 110 },
89	{ .throughput = 200 * 1024, .blink_time = 80 },
90	{ .throughput = 300 * 1024, .blink_time = 50 },
91	};
92
93	static int mt76_led_init(struct mt76_dev *dev)
94	{
95	struct device_node *np = dev->dev->of_node;
96	struct ieee80211_hw *hw = dev->hw;
97	int led_pin;
98
99	if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set)
100	return 0;
101
102	snprintf(dev->led_name, sizeof(dev->led_name),
103	"mt76-%s", wiphy_name(hw->wiphy));
104
105	dev->led_cdev.name = dev->led_name;
106	dev->led_cdev.default_trigger =
107	ieee80211_create_tpt_led_trigger(hw,
108	IEEE80211_TPT_LEDTRIG_FL_RADIO,
109	mt76_tpt_blink,
110	ARRAY_SIZE(mt76_tpt_blink));
111
112	np = of_get_child_by_name(np, "led");
113	if (np) {
114	if (!of_property_read_u32(np, "led-sources", &led_pin))
115	dev->led_pin = led_pin;
116	dev->led_al = of_property_read_bool(np, "led-active-low");
117	}
118
119	return devm_led_classdev_register(dev->dev, &dev->led_cdev);
120	}
121
122	static int
123	mt76_init_sband(struct mt76_dev dev, struct mt76_sband msband,
124	const struct ieee80211_channel *chan, int n_chan,
125	struct ieee80211_rate *rates, int n_rates, bool vht)
126	{
127	struct ieee80211_supported_band *sband = &msband->sband;
128	struct ieee80211_sta_ht_cap *ht_cap;
129	struct ieee80211_sta_vht_cap *vht_cap;
130	void *chanlist;
131	u16 mcs_map;
132	int size;
133
134	size = n_chan * sizeof(*chan);
135	chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL);
136	if (!chanlist)
137	return -ENOMEM;
138
139	msband->chan = devm_kzalloc(dev->dev, n_chan * sizeof(*msband->chan),
140	GFP_KERNEL);
141	if (!msband->chan)
142	return -ENOMEM;
143
144	sband->channels = chanlist;
145	sband->n_channels = n_chan;
146	sband->bitrates = rates;
147	sband->n_bitrates = n_rates;
148	dev->chandef.chan = &sband->channels[0];
149
150	ht_cap = &sband->ht_cap;
151	ht_cap->ht_supported = true;
152	ht_cap->cap \|= IEEE80211_HT_CAP_SUP_WIDTH_20_40 \|
153	IEEE80211_HT_CAP_GRN_FLD \|
154	IEEE80211_HT_CAP_SGI_20 \|
155	IEEE80211_HT_CAP_SGI_40 \|
156	IEEE80211_HT_CAP_TX_STBC \|
157	(1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
158
159	ht_cap->mcs.rx_mask[0] = 0xff;
160	ht_cap->mcs.rx_mask[1] = 0xff;
161	ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
162	ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
163	ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
164
165	if (!vht)
166	return 0;
167
168	vht_cap = &sband->vht_cap;
169	vht_cap->vht_supported = true;
170
171	mcs_map = (IEEE80211_VHT_MCS_SUPPORT_0_9 << (0 * 2)) \|
172	(IEEE80211_VHT_MCS_SUPPORT_0_9 << (1 * 2)) \|
173	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (2 * 2)) \|
174	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (3 * 2)) \|
175	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (4 * 2)) \|
176	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (5 * 2)) \|
177	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (6 * 2)) \|
178	(IEEE80211_VHT_MCS_NOT_SUPPORTED << (7 * 2));
179
180	vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map);
181	vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map);
182	vht_cap->cap \|= IEEE80211_VHT_CAP_RXLDPC \|
183	IEEE80211_VHT_CAP_TXSTBC \|
184	IEEE80211_VHT_CAP_RXSTBC_1 \|
185	IEEE80211_VHT_CAP_SHORT_GI_80;
186
187	return 0;
188	}
189
190	static int
191	mt76_init_sband_2g(struct mt76_dev dev, struct ieee80211_rate rates,
192	int n_rates)
193	{
194	dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->sband_2g.sband;
195
196	return mt76_init_sband(dev, &dev->sband_2g,
197	mt76_channels_2ghz,
198	ARRAY_SIZE(mt76_channels_2ghz),
199	rates, n_rates, false);
200	}
201
202	static int
203	mt76_init_sband_5g(struct mt76_dev dev, struct ieee80211_rate rates,
204	int n_rates, bool vht)
205	{
206	dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->sband_5g.sband;
207
208	return mt76_init_sband(dev, &dev->sband_5g,
209	mt76_channels_5ghz,
210	ARRAY_SIZE(mt76_channels_5ghz),
211	rates, n_rates, vht);
212	}
213
214	static void
215	mt76_check_sband(struct mt76_dev *dev, int band)
216	{
217	struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band];
218	bool found = false;
219	int i;
220
221	if (!sband)
222	return;
223
224	for (i = 0; i < sband->n_channels; i++) {
225	if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED)
226	continue;
227
228	found = true;
229	break;
230	}
231
232	if (found)
233	return;
234
235	sband->n_channels = 0;
236	dev->hw->wiphy->bands[band] = NULL;
237	}
238
239	int mt76_register_device(struct mt76_dev *dev, bool vht,
240	struct ieee80211_rate *rates, int n_rates)
241	{
242	struct ieee80211_hw *hw = dev->hw;
243	struct wiphy *wiphy = hw->wiphy;
244	int ret;
245
246	dev_set_drvdata(dev->dev, dev);
247
248	spin_lock_init(&dev->lock);
249	spin_lock_init(&dev->cc_lock);
250	INIT_LIST_HEAD(&dev->txwi_cache);
251
252	SET_IEEE80211_DEV(hw, dev->dev);
253	SET_IEEE80211_PERM_ADDR(hw, dev->macaddr);
254
255	wiphy->interface_modes =
256	BIT(NL80211_IFTYPE_STATION) \|
257	BIT(NL80211_IFTYPE_AP) \|
258	#ifdef CONFIG_MAC80211_MESH
259	BIT(NL80211_IFTYPE_MESH_POINT) \|
260	#endif
261	BIT(NL80211_IFTYPE_ADHOC);
262
263	wiphy->features \|= NL80211_FEATURE_ACTIVE_MONITOR;
264
24114a5f LB	265	wiphy->available_antennas_tx = dev->antenna_mask;
	266	wiphy->available_antennas_rx = dev->antenna_mask;
	267
17f1de56 FF	268	hw->txq_data_size = sizeof(struct mt76_txq);
	269	hw->max_tx_fragments = 16;
	270
	271	ieee80211_hw_set(hw, SIGNAL_DBM);
	272	ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
	273	ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING);
	274	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
	275	ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
	276	ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
	277	ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
	278	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
	279	ieee80211_hw_set(hw, TX_AMSDU);
	280	ieee80211_hw_set(hw, TX_FRAG_LIST);
	281	ieee80211_hw_set(hw, MFP_CAPABLE);
d71ef286	282	ieee80211_hw_set(hw, AP_LINK_PS);
17f1de56 FF	283
	284	wiphy->flags \|= WIPHY_FLAG_IBSS_RSN;
	285
	286	if (dev->cap.has_2ghz) {
	287	ret = mt76_init_sband_2g(dev, rates, n_rates);
	288	if (ret)
	289	return ret;
	290	}
	291
	292	if (dev->cap.has_5ghz) {
	293	ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht);
	294	if (ret)
	295	return ret;
	296	}
	297
	298	wiphy_read_of_freq_limits(dev->hw->wiphy);
	299	mt76_check_sband(dev, NL80211_BAND_2GHZ);
	300	mt76_check_sband(dev, NL80211_BAND_5GHZ);
	301
	302	ret = mt76_led_init(dev);
	303	if (ret)
	304	return ret;
	305
	306	return ieee80211_register_hw(hw);
	307	}
	308	EXPORT_SYMBOL_GPL(mt76_register_device);
	309
	310	void mt76_unregister_device(struct mt76_dev *dev)
	311	{
	312	struct ieee80211_hw *hw = dev->hw;
	313
	314	ieee80211_unregister_hw(hw);
	315	mt76_tx_free(dev);
	316	}
	317	EXPORT_SYMBOL_GPL(mt76_unregister_device);
	318
	319	void mt76_rx(struct mt76_dev dev, enum mt76_rxq_id q, struct sk_buff skb)
	320	{
	321	if (!test_bit(MT76_STATE_RUNNING, &dev->state)) {
	322	dev_kfree_skb(skb);
	323	return;
	324	}
	325
	326	__skb_queue_tail(&dev->rx_skb[q], skb);
	327	}
	328	EXPORT_SYMBOL_GPL(mt76_rx);
	329
	330	void mt76_set_channel(struct mt76_dev *dev)
	331	{
	332	struct ieee80211_hw *hw = dev->hw;
	333	struct cfg80211_chan_def *chandef = &hw->conf.chandef;
	334	struct mt76_channel_state *state;
	335	bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL;
	336
	337	if (dev->drv->update_survey)
	338	dev->drv->update_survey(dev);
	339
	340	dev->chandef = *chandef;
	341
	342	if (!offchannel)
	343	dev->main_chan = chandef->chan;
	344
	345	if (chandef->chan != dev->main_chan) {
	346	state = mt76_channel_state(dev, chandef->chan);
347	memset(state, 0, sizeof(*state));
348	}
349	}
350	EXPORT_SYMBOL_GPL(mt76_set_channel);
351
352	int mt76_get_survey(struct ieee80211_hw *hw, int idx,
353	struct survey_info *survey)
354	{
355	struct mt76_dev *dev = hw->priv;
356	struct mt76_sband *sband;
357	struct ieee80211_channel *chan;
358	struct mt76_channel_state *state;
359	int ret = 0;
360
361	if (idx == 0 && dev->drv->update_survey)
362	dev->drv->update_survey(dev);
363
364	sband = &dev->sband_2g;
365	if (idx >= sband->sband.n_channels) {
366	idx -= sband->sband.n_channels;
367	sband = &dev->sband_5g;
368	}
369
370	if (idx >= sband->sband.n_channels)
371	return -ENOENT;
372
373	chan = &sband->sband.channels[idx];
374	state = mt76_channel_state(dev, chan);
375
376	memset(survey, 0, sizeof(*survey));
377	survey->channel = chan;
378	survey->filled = SURVEY_INFO_TIME \| SURVEY_INFO_TIME_BUSY;
379	if (chan == dev->main_chan)
380	survey->filled \|= SURVEY_INFO_IN_USE;
381
382	spin_lock_bh(&dev->cc_lock);
383	survey->time = div_u64(state->cc_active, 1000);
384	survey->time_busy = div_u64(state->cc_busy, 1000);
385	spin_unlock_bh(&dev->cc_lock);
386
387	return ret;
388	}
389	EXPORT_SYMBOL_GPL(mt76_get_survey);
390
30ce7f44 FF	391	void mt76_wcid_key_setup(struct mt76_dev dev, struct mt76_wcid wcid,
	392	struct ieee80211_key_conf *key)
	393	{
	394	struct ieee80211_key_seq seq;
	395	int i;
	396
	397	wcid->rx_check_pn = false;
	398
	399	if (!key)
	400	return;
	401
	402	if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
	403	wcid->rx_check_pn = true;
	404
	405	for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
	406	ieee80211_get_key_rx_seq(key, i, &seq);
	407	memcpy(wcid->rx_key_pn[i], seq.ccmp.pn, sizeof(seq.ccmp.pn));
	408	}
	409	}
	410	EXPORT_SYMBOL(mt76_wcid_key_setup);
	411
9d9d738b	412	static struct ieee80211_sta mt76_rx_convert(struct sk_buff skb)
4e34249e FF	413	{
	414	struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb);
	415	struct mt76_rx_status mstat;
	416
	417	mstat = ((struct mt76_rx_status ) skb->cb);
	418	memset(status, 0, sizeof(*status));
	419
	420	status->flag = mstat.flag;
	421	status->freq = mstat.freq;
	422	status->enc_flags = mstat.enc_flags;
	423	status->encoding = mstat.encoding;
	424	status->bw = mstat.bw;
	425	status->rate_idx = mstat.rate_idx;
	426	status->nss = mstat.nss;
	427	status->band = mstat.band;
	428	status->signal = mstat.signal;
	429	status->chains = mstat.chains;
	430
	431	BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb));
	432	BUILD_BUG_ON(sizeof(status->chain_signal) != sizeof(mstat.chain_signal));
	433	memcpy(status->chain_signal, mstat.chain_signal, sizeof(mstat.chain_signal));
9c68a57b FF	434
9c68a57b FF	435	return wcid_to_sta(mstat.wcid);
4e34249e FF	436	}
4e34249e FF	437
30ce7f44 FF	438	static int
	439	mt76_check_ccmp_pn(struct sk_buff *skb)
	440	{
	441	struct mt76_rx_status status = (struct mt76_rx_status ) skb->cb;
	442	struct mt76_wcid *wcid = status->wcid;
	443	struct ieee80211_hdr *hdr;
	444	int ret;
	445
	446	if (!(status->flag & RX_FLAG_DECRYPTED))
	447	return 0;
	448
	449	if (!wcid \|\| !wcid->rx_check_pn)
	450	return 0;
	451
	452	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
	453	/*
	454	* Validate the first fragment both here and in mac80211
	455	* All further fragments will be validated by mac80211 only.
	456	*/
	457	hdr = (struct ieee80211_hdr *) skb->data;
	458	if (ieee80211_is_frag(hdr) &&
	459	!ieee80211_is_first_frag(hdr->frame_control))
	460	return 0;
	461	}
	462
	463	BUILD_BUG_ON(sizeof(status->iv) != sizeof(wcid->rx_key_pn[0]));
	464	ret = memcmp(status->iv, wcid->rx_key_pn[status->tid],
	465	sizeof(status->iv));
	466	if (ret <= 0)
	467	return -EINVAL; /* replay */
	468
	469	memcpy(wcid->rx_key_pn[status->tid], status->iv, sizeof(status->iv));
	470
	471	if (status->flag & RX_FLAG_IV_STRIPPED)
	472	status->flag \|= RX_FLAG_PN_VALIDATED;
	473
	474	return 0;
	475	}
	476
d71ef286 FF	477	static void
	478	mt76_check_ps(struct mt76_dev dev, struct sk_buff skb)
	479	{
	480	struct mt76_rx_status status = (struct mt76_rx_status ) skb->cb;
	481	struct ieee80211_hdr hdr = (struct ieee80211_hdr ) skb->data;
	482	struct ieee80211_sta *sta;
	483	struct mt76_wcid *wcid = status->wcid;
	484	bool ps;
	485
	486	if (!wcid \|\| !wcid->sta)
	487	return;
	488
	489	sta = container_of((void *) wcid, struct ieee80211_sta, drv_priv);
	490
	491	if (!test_bit(MT_WCID_FLAG_CHECK_PS, &wcid->flags))
	492	return;
	493
	494	if (ieee80211_is_pspoll(hdr->frame_control)) {
	495	ieee80211_sta_pspoll(sta);
	496	return;
	497	}
	498
	499	if (ieee80211_has_morefrags(hdr->frame_control) \|\|
	500	!(ieee80211_is_mgmt(hdr->frame_control) \|\|
	501	ieee80211_is_data(hdr->frame_control)))
	502	return;
	503
	504	ps = ieee80211_has_pm(hdr->frame_control);
	505
	506	if (ps && (ieee80211_is_data_qos(hdr->frame_control) \|\|
	507	ieee80211_is_qos_nullfunc(hdr->frame_control)))
	508	ieee80211_sta_uapsd_trigger(sta, status->tid);
	509
	510	if (!!test_bit(MT_WCID_FLAG_PS, &wcid->flags) == ps)
	511	return;
	512
	513	if (ps) {
	514	set_bit(MT_WCID_FLAG_PS, &wcid->flags);
	515	mt76_stop_tx_queues(dev, sta, true);
	516	} else {
	517	clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
	518	}
	519
	520	ieee80211_sta_ps_transition(sta, ps);
	521	dev->drv->sta_ps(dev, sta, ps);
	522	}
	523
9d9d738b FF	524	void mt76_rx_complete(struct mt76_dev dev, struct sk_buff_head frames,
9d9d738b FF	525	int queue)
17f1de56	526	{
9d9d738b	527	struct napi_struct *napi = NULL;
9c68a57b	528	struct ieee80211_sta *sta;
9d9d738b FF	529	struct sk_buff *skb;
	530
	531	if (queue >= 0)
	532	napi = &dev->napi[queue];
	533
	534	while ((skb = __skb_dequeue(frames)) != NULL) {
30ce7f44 FF	535	if (mt76_check_ccmp_pn(skb)) {
	536	dev_kfree_skb(skb);
	537	continue;
	538	}
	539
9d9d738b FF	540	sta = mt76_rx_convert(skb);
	541	ieee80211_rx_napi(dev->hw, sta, skb, napi);
	542	}
	543	}
	544
	545	void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q)
	546	{
aee5b8cf	547	struct sk_buff_head frames;
17f1de56 FF	548	struct sk_buff *skb;
17f1de56 FF	549
aee5b8cf FF	550	__skb_queue_head_init(&frames);
aee5b8cf FF	551
d71ef286 FF	552	while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) {
d71ef286 FF	553	mt76_check_ps(dev, skb);
aee5b8cf	554	mt76_rx_aggr_reorder(skb, &frames);
d71ef286	555	}
aee5b8cf	556
9d9d738b	557	mt76_rx_complete(dev, &frames, q);
17f1de56	558	}