[PATCH] mt76: mt7921: Add hotspot mode support

sean.wang
2022-03-31T22:43:07Z

From: Sean Wang <sean.wang@mediatek.com>

add hostspot mode support to mt7921 that can work for mt7921[e,s,u]
with the common code.

Tested-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
---
.../net/wireless/mediatek/mt76/mt7921/init.c | 11 ++-
.../net/wireless/mediatek/mt76/mt7921/mac.c | 9 +++
.../net/wireless/mediatek/mt76/mt7921/main.c | 46 +++++++++++
.../net/wireless/mediatek/mt76/mt7921/mcu.c | 79 ++++++++++++++++++-
.../wireless/mediatek/mt76/mt7921/mt7921.h | 4 +
5 files changed, 147 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
index 91fc41922d95..f9e1255bd9c7 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -11,6 +11,10 @@ static const struct ieee80211_iface_limit if_limits[] = {
{
.max = MT7921_MAX_INTERFACES,
.types = BIT(NL80211_IFTYPE_STATION)
+ },
+ {
+ .max = 1,
+ .types = BIT(NL80211_IFTYPE_AP)
}
};

@@ -64,7 +68,8 @@ mt7921_init_wiphy(struct ieee80211_hw *hw)
wiphy->iface_combinations = if_comb;
wiphy->flags &= ~(WIPHY_FLAG_IBSS_RSN | WIPHY_FLAG_4ADDR_AP |
WIPHY_FLAG_4ADDR_STATION);
- wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
+ wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
+ BIT(NL80211_IFTYPE_AP);
wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
wiphy->max_scan_ie_len = MT76_CONNAC_SCAN_IE_LEN;
wiphy->max_scan_ssids = 4;
@@ -80,6 +85,10 @@ mt7921_init_wiphy(struct ieee80211_hw *hw)
wiphy->features |= NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL);
+ wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_LEGACY);
+ wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_HT);
+ wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_VHT);
+ wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_BEACON_RATE_HE);

ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
ieee80211_hw_set(hw, HAS_RATE_CONTROL);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index f34070ca7bbe..368e54c53ddd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -1361,12 +1361,21 @@ mt7921_vif_connect_iter(void *priv, u8 *mac,
{
struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
struct mt7921_dev *dev = mvif->phy->dev;
+ struct ieee80211_hw *hw = mt76_hw(dev);

if (vif->type == NL80211_IFTYPE_STATION)
ieee80211_disconnect(vif, true);

mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, true);
mt7921_mcu_set_tx(dev, vif);
+
+ if (vif->type == NL80211_IFTYPE_AP) {
+ mt76_connac_mcu_uni_add_bss(dev->phy.mt76, vif, &mvif->sta.wcid,
+ true);
+ mt7921_mcu_sta_update(dev, NULL, vif, true,
+ MT76_STA_INFO_STATE_NONE);
+ mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
+ }
}

/* system error recovery */
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index ae86705faec2..52b7e3684189 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -53,6 +53,7 @@ mt7921_init_he_caps(struct mt7921_phy *phy, enum nl80211_band band,

switch (i) {
case NL80211_IFTYPE_STATION:
+ case NL80211_IFTYPE_AP:
break;
default:
continue;
@@ -86,6 +87,23 @@ mt7921_init_he_caps(struct mt7921_phy *phy, enum nl80211_band band,
IEEE80211_HE_PHY_CAP2_UL_MU_PARTIAL_MU_MIMO;

switch (i) {
+ case NL80211_IFTYPE_AP:
+ he_cap_elem->mac_cap_info[2] |=
+ IEEE80211_HE_MAC_CAP2_BSR;
+ he_cap_elem->mac_cap_info[4] |=
+ IEEE80211_HE_MAC_CAP4_BQR;
+ he_cap_elem->mac_cap_info[5] |=
+ IEEE80211_HE_MAC_CAP5_OM_CTRL_UL_MU_DATA_DIS_RX;
+ he_cap_elem->phy_cap_info[3] |=
+ IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_TX_QPSK |
+ IEEE80211_HE_PHY_CAP3_DCM_MAX_CONST_RX_QPSK;
+ he_cap_elem->phy_cap_info[6] |=
+ IEEE80211_HE_PHY_CAP6_PARTIAL_BW_EXT_RANGE |
+ IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT;
+ he_cap_elem->phy_cap_info[9] |=
+ IEEE80211_HE_PHY_CAP9_TX_1024_QAM_LESS_THAN_242_TONE_RU |
+ IEEE80211_HE_PHY_CAP9_RX_1024_QAM_LESS_THAN_242_TONE_RU;
+ break;
case NL80211_IFTYPE_STATION:
he_cap_elem->mac_cap_info[1] |=
IEEE80211_HE_MAC_CAP1_TF_MAC_PAD_DUR_16US;
@@ -634,6 +652,21 @@ static void mt7921_bss_info_changed(struct ieee80211_hw *hw,
}
}

+ if (changed & BSS_CHANGED_BEACON_ENABLED && info->enable_beacon) {
+ struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+
+ mt76_connac_mcu_uni_add_bss(phy->mt76, vif, &mvif->sta.wcid,
+ true);
+ mt7921_mcu_sta_update(dev, NULL, vif, true,
+ MT76_STA_INFO_STATE_NONE);
+ }
+
+ if (changed & (BSS_CHANGED_BEACON |
+ BSS_CHANGED_BEACON_ENABLED)) {
+ mt7921_mcu_uni_add_beacon_offload(dev, hw, vif,
+ info->enable_beacon);
+ }
+
/* ensure that enable txcmd_mode after bss_info */
if (changed & (BSS_CHANGED_QOS | BSS_CHANGED_BEACON_ENABLED))
mt7921_mcu_set_tx(dev, vif);
@@ -1394,6 +1427,18 @@ static int mt7921_set_sar_specs(struct ieee80211_hw *hw,
return err;
}

+static void
+mt7921_channel_switch_beacon(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct cfg80211_chan_def *chandef)
+{
+ struct mt7921_dev *dev = mt7921_hw_dev(hw);
+
+ mt7921_mutex_acquire(dev);
+ mt7921_mcu_uni_add_beacon_offload(dev, hw, vif, true);
+ mt7921_mutex_release(dev);
+}
+
const struct ieee80211_ops mt7921_ops = {
.tx = mt7921_tx,
.start = mt7921_start,
@@ -1412,6 +1457,7 @@ const struct ieee80211_ops mt7921_ops = {
.set_rts_threshold = mt7921_set_rts_threshold,
.wake_tx_queue = mt76_wake_tx_queue,
.release_buffered_frames = mt76_release_buffered_frames,
+ .channel_switch_beacon = mt7921_channel_switch_beacon,
.get_txpower = mt76_get_txpower,
.get_stats = mt7921_get_stats,
.get_et_sset_count = mt7921_get_et_sset_count,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
index da2be050ed7c..1ecbbe4fa498 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mcu.c
@@ -248,7 +248,8 @@ mt7921_mcu_connection_loss_iter(void *priv, u8 *mac,
if (mvif->idx != event->bss_idx)
return;

- if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
+ if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER) ||
+ vif->type != NL80211_IFTYPE_STATION)
return;

ieee80211_connection_loss(vif);
@@ -1166,3 +1167,79 @@ int mt7921_mcu_set_sniffer(struct mt7921_dev *dev, struct ieee80211_vif *vif,
return mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD(SNIFFER), &req, sizeof(req),
true);
}
+
+int
+mt7921_mcu_uni_add_beacon_offload(struct mt7921_dev *dev,
+ struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ bool enable)
+{
+ struct mt7921_vif *mvif = (struct mt7921_vif *)vif->drv_priv;
+ struct mt76_wcid *wcid = &dev->mt76.global_wcid;
+ struct ieee80211_mutable_offsets offs;
+ struct {
+ struct req_hdr {
+ u8 bss_idx;
+ u8 pad[3];
+ } __packed hdr;
+ struct bcn_content_tlv {
+ __le16 tag;
+ __le16 len;
+ __le16 tim_ie_pos;
+ __le16 csa_ie_pos;
+ __le16 bcc_ie_pos;
+ /* 0: disable beacon offload
+ * 1: enable beacon offload
+ * 2: update probe respond offload
+ */
+ u8 enable;
+ /* 0: legacy format (TXD + payload)
+ * 1: only cap field IE
+ */
+ u8 type;
+ __le16 pkt_len;
+ u8 pkt[512];
+ } __packed beacon_tlv;
+ } req = {
+ .hdr = {
+ .bss_idx = mvif->mt76.idx,
+ },
+ .beacon_tlv = {
+ .tag = cpu_to_le16(UNI_BSS_INFO_BCN_CONTENT),
+ .len = cpu_to_le16(sizeof(struct bcn_content_tlv)),
+ .enable = enable,
+ },
+ };
+ struct sk_buff *skb;
+
+ if (!enable)
+ goto out;
+
+ skb = ieee80211_beacon_get_template(mt76_hw(dev), vif, &offs);
+ if (!skb)
+ return -EINVAL;
+
+ if (skb->len > 512 - MT_TXD_SIZE) {
+ dev_err(dev->mt76.dev, "beacon size limit exceed\n");
+ dev_kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ mt7921_mac_write_txwi(dev, (__le32 *)(req.beacon_tlv.pkt), skb,
+ wcid, NULL, 0, true);
+ memcpy(req.beacon_tlv.pkt + MT_TXD_SIZE, skb->data, skb->len);
+ req.beacon_tlv.pkt_len = cpu_to_le16(MT_TXD_SIZE + skb->len);
+ req.beacon_tlv.tim_ie_pos = cpu_to_le16(MT_TXD_SIZE + offs.tim_offset);
+
+ if (offs.cntdwn_counter_offs[0]) {
+ u16 csa_offs;
+
+ csa_offs = MT_TXD_SIZE + offs.cntdwn_counter_offs[0] - 4;
+ req.beacon_tlv.csa_ie_pos = cpu_to_le16(csa_offs);
+ }
+ dev_kfree_skb(skb);
+
+out:
+ return mt76_mcu_send_msg(&dev->mt76, MCU_UNI_CMD(BSS_INFO_UPDATE),
+ &req, sizeof(req), true);
+}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index eae223a31000..adbdb2e22934 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -469,4 +469,8 @@ int mt7921u_wfsys_reset(struct mt7921_dev *dev);
int mt7921u_dma_init(struct mt7921_dev *dev, bool resume);
int mt7921u_init_reset(struct mt7921_dev *dev);
int mt7921u_mac_reset(struct mt7921_dev *dev);
+int mt7921_mcu_uni_add_beacon_offload(struct mt7921_dev *dev,
+ struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ bool enable);
#endif
--
2.25.1