mt76: mt7615: introduce scheduled scan support
authorLorenzo Bianconi <lorenzo@kernel.org>
Thu, 2 Apr 2020 13:06:39 +0000 (15:06 +0200)
committerFelix Fietkau <nbd@nbd.name>
Tue, 12 May 2020 17:52:28 +0000 (19:52 +0200)
Introduce scheduled scan support for mt7663e devices

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
drivers/net/wireless/mediatek/mt76/mt76.h
drivers/net/wireless/mediatek/mt76/mt7615/init.c
drivers/net/wireless/mediatek/mt76/mt7615/mac.c
drivers/net/wireless/mediatek/mt76/mt7615/main.c
drivers/net/wireless/mediatek/mt76/mt7615/mcu.c
drivers/net/wireless/mediatek/mt76/mt7615/mcu.h
drivers/net/wireless/mediatek/mt76/mt7615/mt7615.h

index 09f407c..ca7475a 100644 (file)
@@ -276,6 +276,7 @@ enum {
        MT76_STATE_MCU_RUNNING,
        MT76_SCANNING,
        MT76_HW_SCANNING,
+       MT76_HW_SCHED_SCANNING,
        MT76_RESTART,
        MT76_RESET,
        MT76_MCU_RESET,
index 04bcc1a..f477594 100644 (file)
@@ -349,7 +349,12 @@ mt7615_init_wiphy(struct ieee80211_hw *hw)
        wiphy->n_iface_combinations = ARRAY_SIZE(if_comb);
        wiphy->reg_notifier = mt7615_regd_notifier;
 
+       wiphy->max_sched_scan_plan_interval = MT7615_MAX_SCHED_SCAN_INTERVAL;
+       wiphy->max_sched_scan_ie_len = IEEE80211_MAX_DATA_LEN;
        wiphy->max_scan_ie_len = MT7615_SCAN_IE_LEN;
+       wiphy->max_sched_scan_ssids = MT7615_MAX_SCHED_SCAN_SSID;
+       wiphy->max_match_sets = MT7615_MAX_SCAN_MATCH;
+       wiphy->max_sched_scan_reqs = 1;
        wiphy->max_scan_ssids = 4;
 
        wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_SET_SCAN_DWELL);
@@ -409,6 +414,7 @@ int mt7615_register_ext_phy(struct mt7615_dev *dev)
                return 0;
 
        INIT_DELAYED_WORK(&phy->scan_work, mt7615_scan_work);
+       skb_queue_head_init(&phy->scan_event_list);
 
        mt7615_cap_dbdc_enable(dev);
        mphy = mt76_alloc_phy(&dev->mt76, sizeof(*phy), &mt7615_ops);
@@ -467,6 +473,7 @@ void mt7615_init_device(struct mt7615_dev *dev)
        dev->mt76.phy.priv = &dev->phy;
        INIT_DELAYED_WORK(&dev->mt76.mac_work, mt7615_mac_work);
        INIT_DELAYED_WORK(&dev->phy.scan_work, mt7615_scan_work);
+       skb_queue_head_init(&dev->phy.scan_event_list);
        INIT_LIST_HEAD(&dev->sta_poll_list);
        spin_lock_init(&dev->sta_poll_lock);
        init_waitqueue_head(&dev->reset_wait);
index d2319fb..c9534fa 100644 (file)
@@ -170,7 +170,8 @@ static void
 mt7615_get_status_freq_info(struct mt7615_dev *dev, struct mt76_phy *mphy,
                            struct mt76_rx_status *status, u8 chfreq)
 {
-       if (!test_bit(MT76_HW_SCANNING, &mphy->state)) {
+       if (!test_bit(MT76_HW_SCANNING, &mphy->state) &&
+           !test_bit(MT76_HW_SCHED_SCANNING, &mphy->state)) {
                status->freq = mphy->chandef.chan->center_freq;
                status->band = mphy->chandef.chan->band;
                return;
index 6a7d802..2c2d763 100644 (file)
@@ -705,16 +705,36 @@ mt7615_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
 
 void mt7615_scan_work(struct work_struct *work)
 {
-       struct cfg80211_scan_info info = {
-               .aborted = false,
-       };
        struct mt7615_phy *phy;
 
        phy = (struct mt7615_phy *)container_of(work, struct mt7615_phy,
                                                scan_work.work);
 
-       clear_bit(MT76_HW_SCANNING, &phy->mt76->state);
-       ieee80211_scan_completed(phy->mt76->hw, &info);
+       while (true) {
+               struct mt7615_mcu_rxd *rxd;
+               struct sk_buff *skb;
+
+               spin_lock_bh(&phy->dev->mt76.lock);
+               skb = __skb_dequeue(&phy->scan_event_list);
+               spin_unlock_bh(&phy->dev->mt76.lock);
+
+               if (!skb)
+                       break;
+
+               rxd = (struct mt7615_mcu_rxd *)skb->data;
+               if (rxd->eid == MCU_EVENT_SCAN_DONE) {
+                       struct cfg80211_scan_info info = {
+                               .aborted = false,
+                       };
+
+                       clear_bit(MT76_HW_SCANNING, &phy->mt76->state);
+                       ieee80211_scan_completed(phy->mt76->hw, &info);
+               } else {
+                       clear_bit(MT76_HW_SCHED_SCANNING, &phy->mt76->state);
+                       ieee80211_sched_scan_results(phy->mt76->hw);
+               }
+               dev_kfree_skb(skb);
+       }
 }
 
 static int
@@ -734,6 +754,29 @@ mt7615_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
        mt7615_mcu_cancel_hw_scan(mphy->priv, vif);
 }
 
+static int
+mt7615_start_sched_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+                       struct cfg80211_sched_scan_request *req,
+                       struct ieee80211_scan_ies *ies)
+{
+       struct mt76_phy *mphy = hw->priv;
+       int err;
+
+       err = mt7615_mcu_sched_scan_req(mphy->priv, vif, req);
+       if (err < 0)
+               return err;
+
+       return mt7615_mcu_sched_scan_enable(mphy->priv, vif, true);
+}
+
+static int
+mt7615_stop_sched_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+       struct mt76_phy *mphy = hw->priv;
+
+       return mt7615_mcu_sched_scan_enable(mphy->priv, vif, false);
+}
+
 const struct ieee80211_ops mt7615_ops = {
        .tx = mt7615_tx,
        .start = mt7615_start,
@@ -765,6 +808,8 @@ const struct ieee80211_ops mt7615_ops = {
        .set_coverage_class = mt7615_set_coverage_class,
        .hw_scan = mt7615_hw_scan,
        .cancel_hw_scan = mt7615_cancel_hw_scan,
+       .sched_scan_start = mt7615_start_sched_scan,
+       .sched_scan_stop = mt7615_stop_sched_scan,
 };
 
 static int __init mt7615_init(void)
index 0db81ca..193808c 100644 (file)
@@ -318,21 +318,23 @@ mt7615_mcu_rx_ext_event(struct mt7615_dev *dev, struct sk_buff *skb)
 }
 
 static void
-mt7615_mcu_scan_done_event(struct mt7615_dev *dev, struct sk_buff *skb)
+mt7615_mcu_scan_event(struct mt7615_dev *dev, struct sk_buff *skb)
 {
-       struct mt7615_mcu_rxd *rxd = (struct mt7615_mcu_rxd *)skb->data;
-       struct mt7615_hw_scan_done *event;
+       u8 *seq_num = skb->data + sizeof(struct mt7615_mcu_rxd);
        struct mt7615_phy *phy;
        struct mt76_phy *mphy;
 
-       skb_pull(skb, sizeof(*rxd));
-       event = (struct mt7615_hw_scan_done *)skb->data;
-       if (event->seq_num & BIT(7) && dev->mt76.phy2)
+       if (*seq_num & BIT(7) && dev->mt76.phy2)
                mphy = dev->mt76.phy2;
        else
                mphy = &dev->mt76.phy;
 
        phy = (struct mt7615_phy *)mphy->priv;
+
+       spin_lock_bh(&dev->mt76.lock);
+       __skb_queue_tail(&phy->scan_event_list, skb);
+       spin_unlock_bh(&dev->mt76.lock);
+
        ieee80211_queue_delayed_work(mphy->hw, &phy->scan_work,
                                     MT7615_HW_SCAN_TIMEOUT);
 }
@@ -346,9 +348,10 @@ mt7615_mcu_rx_unsolicited_event(struct mt7615_dev *dev, struct sk_buff *skb)
        case MCU_EVENT_EXT:
                mt7615_mcu_rx_ext_event(dev, skb);
                break;
+       case MCU_EVENT_SCHED_SCAN_DONE:
        case MCU_EVENT_SCAN_DONE:
-               mt7615_mcu_scan_done_event(dev, skb);
-               break;
+               mt7615_mcu_scan_event(dev, skb);
+               return;
        default:
                break;
        }
@@ -363,6 +366,7 @@ void mt7615_mcu_rx_event(struct mt7615_dev *dev, struct sk_buff *skb)
            rxd->ext_eid == MCU_EXT_EVENT_FW_LOG_2_HOST ||
            rxd->ext_eid == MCU_EXT_EVENT_ASSERT_DUMP ||
            rxd->ext_eid == MCU_EXT_EVENT_PS_SYNC ||
+           rxd->eid == MCU_EVENT_SCHED_SCAN_DONE ||
            rxd->eid == MCU_EVENT_SCAN_DONE ||
            !rxd->seq)
                mt7615_mcu_rx_unsolicited_event(dev, skb);
@@ -2614,3 +2618,93 @@ int mt7615_mcu_cancel_hw_scan(struct mt7615_phy *phy,
        return __mt76_mcu_send_msg(&dev->mt76,  MCU_CMD_CANCEL_HW_SCAN, &req,
                                   sizeof(req), false);
 }
+
+int mt7615_mcu_sched_scan_req(struct mt7615_phy *phy,
+                             struct ieee80211_vif *vif,
+                             struct cfg80211_sched_scan_request *sreq)
+{
+       struct mt7615_vif *mvif = (struct mt7615_vif *)vif->drv_priv;
+       struct ieee80211_channel **scan_list = sreq->channels;
+       struct mt7615_dev *dev = phy->dev;
+       bool ext_phy = phy != &dev->phy;
+       struct mt7615_mcu_scan_channel *chan;
+       struct mt7615_sched_scan_req *req;
+       struct cfg80211_match_set *match;
+       struct cfg80211_ssid *ssid;
+       struct sk_buff *skb;
+       int i;
+
+       if (!mt7615_firmware_offload(dev))
+               return -ENOTSUPP;
+
+       skb = mt7615_mcu_msg_alloc(NULL, sizeof(*req) + sreq->ie_len);
+       if (!skb)
+               return -ENOMEM;
+
+       mvif->scan_seq_num = (mvif->scan_seq_num + 1) & 0x7f;
+
+       req = (struct mt7615_sched_scan_req *)skb_put(skb, sizeof(*req));
+       req->version = 1;
+       req->seq_num = mvif->scan_seq_num | ext_phy << 7;
+       req->scan_func = !!(sreq->flags & NL80211_SCAN_FLAG_RANDOM_ADDR);
+
+       req->ssids_num = sreq->n_ssids;
+       for (i = 0; i < req->ssids_num; i++) {
+               ssid = &sreq->ssids[i];
+               memcpy(req->ssids[i].ssid, ssid->ssid, ssid->ssid_len);
+               req->ssids[i].ssid_len = cpu_to_le32(ssid->ssid_len);
+       }
+
+       req->match_num = sreq->n_match_sets;
+       for (i = 0; i < req->match_num; i++) {
+               match = &sreq->match_sets[i];
+               memcpy(req->match[i].ssid, match->ssid.ssid,
+                      match->ssid.ssid_len);
+               req->match[i].rssi_th = cpu_to_le32(match->rssi_thold);
+               req->match[i].ssid_len = match->ssid.ssid_len;
+       }
+
+       req->channel_type = 4;
+       req->channels_num = min_t(u8, sreq->n_channels, 64);
+       for (i = 0; i < req->channels_num; i++) {
+               chan = &req->channels[i];
+               chan->band = scan_list[i]->band == NL80211_BAND_2GHZ ? 1 : 2;
+               chan->channel_num = scan_list[i]->hw_value;
+       }
+
+       req->intervals_num = sreq->n_scan_plans;
+       for (i = 0; i < req->intervals_num; i++)
+               req->intervals[i] = cpu_to_le16(sreq->scan_plans[i].interval);
+
+       if (sreq->ie_len > 0) {
+               req->ie_len = cpu_to_le16(sreq->ie_len);
+               memcpy(skb_put(skb, sreq->ie_len), sreq->ie, sreq->ie_len);
+       }
+
+       return __mt76_mcu_skb_send_msg(&dev->mt76, skb,
+                                      MCU_CMD_SCHED_SCAN_REQ, false);
+}
+
+int mt7615_mcu_sched_scan_enable(struct mt7615_phy *phy,
+                                struct ieee80211_vif *vif,
+                                bool enable)
+{
+       struct mt7615_dev *dev = phy->dev;
+       struct {
+               u8 active; /* 0: enabled 1: disabled */
+               u8 rsv[3];
+       } __packed req = {
+               .active = !enable,
+       };
+
+       if (!mt7615_firmware_offload(dev))
+               return -ENOTSUPP;
+
+       if (enable)
+               set_bit(MT76_HW_SCHED_SCANNING, &phy->mt76->state);
+       else
+               clear_bit(MT76_HW_SCHED_SCANNING, &phy->mt76->state);
+
+       return __mt76_mcu_send_msg(&dev->mt76, MCU_CMD_SCHED_SCAN_ENABLE,
+                                  &req, sizeof(req), false);
+}
index 0ce709d..7e55da2 100644 (file)
@@ -83,6 +83,7 @@ enum {
        MCU_EVENT_MT_PATCH_SEM = 0x04,
        MCU_EVENT_SCAN_DONE = 0x0d,
        MCU_EVENT_CH_PRIVILEGE = 0x18,
+       MCU_EVENT_SCHED_SCAN_DONE = 0x23,
        MCU_EVENT_EXT = 0xed,
        MCU_EVENT_RESTART_DL = 0xef,
 };
@@ -291,6 +292,13 @@ struct mt7615_mcu_scan_channel {
        u8 channel_num;
 } __packed;
 
+struct mt7615_mcu_scan_match {
+       __le32 rssi_th;
+       u8 ssid[IEEE80211_MAX_SSID_LEN];
+       u8 ssid_len;
+       u8 rsv[3];
+} __packed;
+
 struct mt7615_hw_scan_req {
        u8 seq_num;
        u8 bss_idx;
@@ -365,11 +373,38 @@ struct mt7615_hw_scan_done {
        __le32 beacon_5g_num;
 } __packed;
 
+struct mt7615_sched_scan_req {
+       u8 version;
+       u8 seq_num;
+       u8 stop_on_match;
+       u8 ssids_num;
+       u8 match_num;
+       u8 pad;
+       __le16 ie_len;
+       struct mt7615_mcu_scan_ssid ssids[MT7615_MAX_SCHED_SCAN_SSID];
+       struct mt7615_mcu_scan_match match[MT7615_MAX_SCAN_MATCH];
+       u8 channel_type;
+       u8 channels_num;
+       u8 intervals_num;
+       u8 scan_func;
+       struct mt7615_mcu_scan_channel channels[64];
+       __le16 intervals[MT7615_MAX_SCHED_SCAN_INTERVAL];
+       u8 pad2[64];
+} __packed;
+
+struct nt7615_sched_scan_done {
+       u8 seq_num;
+       u8 status; /* 0: ssid found */
+       __le16 pad;
+} __packed;
+
 /* offload mcu commands */
 enum {
        MCU_CMD_START_HW_SCAN = MCU_CE_PREFIX | 0x03,
        MCU_CMD_SET_CHAN_DOMAIN = MCU_CE_PREFIX | 0x0f,
        MCU_CMD_CANCEL_HW_SCAN = MCU_CE_PREFIX | 0x1b,
+       MCU_CMD_SCHED_SCAN_ENABLE = MCU_CE_PREFIX | 0x61,
+       MCU_CMD_SCHED_SCAN_REQ = MCU_CE_PREFIX | 0x62,
 };
 
 #define MCU_CMD_ACK            BIT(0)
index c2faa9e..9206157 100644 (file)
@@ -59,6 +59,9 @@
 #define MT7615_CFEND_RATE_11B          0x03 /* 11B LP, 11M */
 
 #define MT7615_SCAN_IE_LEN             600
+#define MT7615_MAX_SCHED_SCAN_INTERVAL 10
+#define MT7615_MAX_SCHED_SCAN_SSID     10
+#define MT7615_MAX_SCAN_MATCH          16
 
 struct mt7615_vif;
 struct mt7615_sta;
@@ -155,6 +158,7 @@ struct mt7615_phy {
 
        struct mib_stats mib;
 
+       struct sk_buff_head scan_event_list;
        struct delayed_work scan_work;
 };
 
@@ -412,6 +416,12 @@ int mt7615_mcu_hw_scan(struct mt7615_phy *phy, struct ieee80211_vif *vif,
                       struct ieee80211_scan_request *scan_req);
 int mt7615_mcu_cancel_hw_scan(struct mt7615_phy *phy,
                              struct ieee80211_vif *vif);
+int mt7615_mcu_sched_scan_req(struct mt7615_phy *phy,
+                             struct ieee80211_vif *vif,
+                             struct cfg80211_sched_scan_request *sreq);
+int mt7615_mcu_sched_scan_enable(struct mt7615_phy *phy,
+                                struct ieee80211_vif *vif,
+                                bool enable);
 
 int mt7615_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
                          enum mt76_txq_id qid, struct mt76_wcid *wcid,