[PATCH v3] wifi: ath12k: add support to handle beacon miss for WCN7850
Nicolas Escande
nico.escande at gmail.com
Fri Apr 12 03:16:12 PDT 2024
On Fri Apr 12, 2024 at 11:44 AM CEST, kangyang wrote:
> From: Kang Yang <quic_kangyang at quicinc.com>
>
> When AP goes down or too far away without indication to STA, beacon miss
> will be detected. Then for WCN7850's firmware, it will use roam event
> to send beacon miss to host.
>
> If STA doesn't handle the beacon miss, will keep the fake connection
> and unable to roam.
>
> So add support for WCN7850 to trigger disconnection from AP when
> receiving this event from firmware.
>
> It has to be noted that beacon miss event notification for QCN9274
> to be handled in a separate patch as it uses STA kickout WMI event
> to notify beacon miss and the current STA kickout event is processed
> as low_ack.
>
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
>
> Signed-off-by: Kang Yang <quic_kangyang at quicinc.com>
> ---
>
> v3: move INIT_DELAYED_WORK to add_interface().
> v2: rebased on latest tag: ath-202404101413.
>
> ---
> drivers/net/wireless/ath/ath12k/core.h | 2 +
> drivers/net/wireless/ath/ath12k/mac.c | 75 +++++++++++++++++++++++++-
> drivers/net/wireless/ath/ath12k/mac.h | 2 +
> drivers/net/wireless/ath/ath12k/wmi.c | 34 ++++++------
> drivers/net/wireless/ath/ath12k/wmi.h | 3 ++
> 5 files changed, 98 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath12k/core.h b/drivers/net/wireless/ath/ath12k/core.h
> index 397d8c973265..e125efe20dde 100644
> --- a/drivers/net/wireless/ath/ath12k/core.h
> +++ b/drivers/net/wireless/ath/ath12k/core.h
> @@ -46,6 +46,7 @@
> #define ATH12K_SMBIOS_BDF_EXT_MAGIC "BDF_"
>
> #define ATH12K_INVALID_HW_MAC_ID 0xFF
> +#define ATH12K_CONNECTION_LOSS_HZ (3 * HZ)
> #define ATH12K_RX_RATE_TABLE_NUM 320
> #define ATH12K_RX_RATE_TABLE_11AX_NUM 576
>
> @@ -275,6 +276,7 @@ struct ath12k_vif {
> u32 aid;
> u8 bssid[ETH_ALEN];
> struct cfg80211_bitrate_mask bitrate_mask;
> + struct delayed_work connection_loss_work;
> int num_legacy_stations;
> int rtscts_prot_mode;
> int txpower;
> diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
> index f15dcd75157d..e8ce9b940753 100644
> --- a/drivers/net/wireless/ath/ath12k/mac.c
> +++ b/drivers/net/wireless/ath/ath12k/mac.c
> @@ -1398,6 +1398,75 @@ static void ath12k_control_beaconing(struct ath12k_vif *arvif,
> ath12k_dbg(ar->ab, ATH12K_DBG_MAC, "mac vdev %d up\n", arvif->vdev_id);
> }
>
> +static void ath12k_mac_handle_beacon_iter(void *data, u8 *mac,
> + struct ieee80211_vif *vif)
> +{
> + struct sk_buff *skb = data;
> + struct ieee80211_mgmt *mgmt = (void *)skb->data;
> + struct ath12k_vif *arvif = ath12k_vif_to_arvif(vif);
> +
> + if (vif->type != NL80211_IFTYPE_STATION)
> + return;
> +
> + if (!ether_addr_equal(mgmt->bssid, vif->bss_conf.bssid))
> + return;
> +
> + cancel_delayed_work(&arvif->connection_loss_work);
> +}
> +
> +void ath12k_mac_handle_beacon(struct ath12k *ar, struct sk_buff *skb)
> +{
> + ieee80211_iterate_active_interfaces_atomic(ath12k_ar_to_hw(ar),
> + IEEE80211_IFACE_ITER_NORMAL,
> + ath12k_mac_handle_beacon_iter,
> + skb);
> +}
> +
> +static void ath12k_mac_handle_beacon_miss_iter(void *data, u8 *mac,
> + struct ieee80211_vif *vif)
> +{
> + u32 *vdev_id = data;
> + struct ath12k_vif *arvif = ath12k_vif_to_arvif(vif);
> + struct ath12k *ar = arvif->ar;
> + struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
> +
> + if (arvif->vdev_id != *vdev_id)
> + return;
> +
> + if (!arvif->is_up)
> + return;
> +
> + ieee80211_beacon_loss(vif);
> +
> + /* Firmware doesn't report beacon loss events repeatedly. If AP probe
> + * (done by mac80211) succeeds but beacons do not resume then it
> + * doesn't make sense to continue operation. Queue connection loss work
> + * which can be cancelled when beacon is received.
> + */
> + ieee80211_queue_delayed_work(hw, &arvif->connection_loss_work,
> + ATH12K_CONNECTION_LOSS_HZ);
> +}
> +
> +void ath12k_mac_handle_beacon_miss(struct ath12k *ar, u32 vdev_id)
> +{
> + ieee80211_iterate_active_interfaces_atomic(ath12k_ar_to_hw(ar),
> + IEEE80211_IFACE_ITER_NORMAL,
> + ath12k_mac_handle_beacon_miss_iter,
> + &vdev_id);
> +}
> +
> +static void ath12k_mac_vif_sta_connection_loss_work(struct work_struct *work)
> +{
> + struct ath12k_vif *arvif = container_of(work, struct ath12k_vif,
> + connection_loss_work.work);
> + struct ieee80211_vif *vif = arvif->vif;
> +
> + if (!arvif->is_up)
> + return;
> +
> + ieee80211_connection_loss(vif);
> +}
> +
> static void ath12k_peer_assoc_h_basic(struct ath12k *ar,
> struct ieee80211_vif *vif,
> struct ieee80211_sta *sta,
> @@ -2570,7 +2639,7 @@ static void ath12k_bss_disassoc(struct ath12k *ar,
>
> arvif->is_up = false;
>
> - /* TODO: cancel connection_loss_work */
> + cancel_delayed_work(&arvif->connection_loss_work);
> }
>
> static u32 ath12k_mac_get_rate_hw_value(int bitrate)
> @@ -6317,6 +6386,8 @@ static int ath12k_mac_op_add_interface(struct ieee80211_hw *hw,
> arvif->vif = vif;
>
> INIT_LIST_HEAD(&arvif->list);
> + INIT_DELAYED_WORK(&arvif->connection_loss_work,
> + ath12k_mac_vif_sta_connection_loss_work);
>
> for (i = 0; i < ARRAY_SIZE(arvif->bitrate_mask.control); i++) {
> arvif->bitrate_mask.control[i].legacy = 0xffffffff;
> @@ -6449,6 +6520,8 @@ static void ath12k_mac_op_remove_interface(struct ieee80211_hw *hw,
> ar = arvif->ar;
> ab = ar->ab;
>
> + cancel_delayed_work_sync(&arvif->connection_loss_work);
> +
> mutex_lock(&ar->conf_mutex);
>
> ath12k_dbg(ab, ATH12K_DBG_MAC, "mac remove interface (vdev %d)\n",
> diff --git a/drivers/net/wireless/ath/ath12k/mac.h b/drivers/net/wireless/ath/ath12k/mac.h
> index 3f5e1be0dff9..bfc655a4dfce 100644
> --- a/drivers/net/wireless/ath/ath12k/mac.h
> +++ b/drivers/net/wireless/ath/ath12k/mac.h
> @@ -78,4 +78,6 @@ enum ath12k_supported_bw ath12k_mac_mac80211_bw_to_ath12k_bw(enum rate_info_bw b
> enum hal_encrypt_type ath12k_dp_tx_get_encrypt_type(u32 cipher);
> int ath12k_mac_rfkill_enable_radio(struct ath12k *ar, bool enable);
> int ath12k_mac_rfkill_config(struct ath12k *ar);
> +void ath12k_mac_handle_beacon(struct ath12k *ar, struct sk_buff *skb);
> +void ath12k_mac_handle_beacon_miss(struct ath12k *ar, u32 vdev_id);
> #endif
> diff --git a/drivers/net/wireless/ath/ath12k/wmi.c b/drivers/net/wireless/ath/ath12k/wmi.c
> index a5575ce9eed4..4fe39e920902 100644
> --- a/drivers/net/wireless/ath/ath12k/wmi.c
> +++ b/drivers/net/wireless/ath/ath12k/wmi.c
> @@ -5927,10 +5927,8 @@ static void ath12k_mgmt_rx_event(struct ath12k_base *ab, struct sk_buff *skb)
> }
> }
>
> - /* TODO: Pending handle beacon implementation
> - *if (ieee80211_is_beacon(hdr->frame_control))
> - * ath12k_mac_handle_beacon(ar, skb);
> - */
> + if (ieee80211_is_beacon(hdr->frame_control))
> + ath12k_mac_handle_beacon(ar, skb);
>
> ath12k_dbg(ab, ATH12K_DBG_MGMT,
> "event mgmt rx skb %pK len %d ftype %02x stype %02x\n",
> @@ -6137,42 +6135,44 @@ static void ath12k_roam_event(struct ath12k_base *ab, struct sk_buff *skb)
> {
> struct wmi_roam_event roam_ev = {};
> struct ath12k *ar;
> + u32 vdev_id;
> + u8 roam_reason;
>
> if (ath12k_pull_roam_ev(ab, skb, &roam_ev) != 0) {
> ath12k_warn(ab, "failed to extract roam event");
> return;
> }
>
> + vdev_id = le32_to_cpu(roam_ev.vdev_id);
> + roam_reason = u32_get_bits(le32_to_cpu(roam_ev.reason),
> + WMI_ROAM_REASON_MASK);
> +
> ath12k_dbg(ab, ATH12K_DBG_WMI,
> - "wmi roam event vdev %u reason 0x%08x rssi %d\n",
> - roam_ev.vdev_id, roam_ev.reason, roam_ev.rssi);
> + "wmi roam event vdev %u reason %d rssi %d\n",
> + vdev_id, roam_reason, roam_ev.rssi);
>
> rcu_read_lock();
> - ar = ath12k_mac_get_ar_by_vdev_id(ab, le32_to_cpu(roam_ev.vdev_id));
> + ar = ath12k_mac_get_ar_by_vdev_id(ab, vdev_id);
> if (!ar) {
> - ath12k_warn(ab, "invalid vdev id in roam ev %d",
> - roam_ev.vdev_id);
> + ath12k_warn(ab, "invalid vdev id in roam ev %d", vdev_id);
> rcu_read_unlock();
> return;
> }
>
> - if (le32_to_cpu(roam_ev.reason) >= WMI_ROAM_REASON_MAX)
> + if (roam_reason >= WMI_ROAM_REASON_MAX)
> ath12k_warn(ab, "ignoring unknown roam event reason %d on vdev %i\n",
> - roam_ev.reason, roam_ev.vdev_id);
> + roam_reason, vdev_id);
>
> - switch (le32_to_cpu(roam_ev.reason)) {
> + switch (roam_reason) {
> case WMI_ROAM_REASON_BEACON_MISS:
> - /* TODO: Pending beacon miss and connection_loss_work
> - * implementation
> - * ath12k_mac_handle_beacon_miss(ar, vdev_id);
> - */
> + ath12k_mac_handle_beacon_miss(ar, vdev_id);
> break;
> case WMI_ROAM_REASON_BETTER_AP:
> case WMI_ROAM_REASON_LOW_RSSI:
> case WMI_ROAM_REASON_SUITABLE_AP_FOUND:
> case WMI_ROAM_REASON_HO_FAILED:
> ath12k_warn(ab, "ignoring not implemented roam event reason %d on vdev %i\n",
> - roam_ev.reason, roam_ev.vdev_id);
> + roam_reason, vdev_id);
> break;
> }
>
> diff --git a/drivers/net/wireless/ath/ath12k/wmi.h b/drivers/net/wireless/ath/ath12k/wmi.h
> index 78afc94a815d..ebf73ddcadc6 100644
> --- a/drivers/net/wireless/ath/ath12k/wmi.h
> +++ b/drivers/net/wireless/ath/ath12k/wmi.h
> @@ -4182,6 +4182,9 @@ struct wmi_peer_sta_kickout_event {
> struct ath12k_wmi_mac_addr_params peer_macaddr;
> } __packed;
>
> +#define WMI_ROAM_REASON_MASK GENMASK(3, 0)
> +#define WMI_ROAM_SUBNET_STATUS_MASK GENMASK(5, 4)
> +
> enum wmi_roam_reason {
> WMI_ROAM_REASON_BETTER_AP = 1,
> WMI_ROAM_REASON_BEACON_MISS = 2,
>
> base-commit: 363e7193eaf258fe7f04e8db560bd8a282a12cd9
LGTM, you can have my reviewed by if needed.
Reviewed-by: Nicolas Escande <nico.escande at gmail.com>
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