On 2020-06-17 08:00, John Crispin wrote:
Whenever the MAC detects a color collision or any of its associated
station
detects one the FW will send out an event. Add the code to parse and
handle
this event. and pass the data up to mac80211.
The FW does not provide an offload future such as the one used for CSA.
The
CCA process is hence triggered via the beacon offload tx completion
events
sent out by the FW.
[...]
+static void
+ath11k_wmi_obss_color_collision_event(struct ath11k_base *ab, struct
sk_buff *skb)
+{
+ const void **tb;
+ const struct wmi_obss_color_collision_event *ev;
+ struct ath11k_vif *arvif;
+ int ret;
+
+ tb = ath11k_wmi_tlv_parse_alloc(ab, skb->data, skb->len, GFP_ATOMIC);
+ if (IS_ERR(tb)) {
+ ret = PTR_ERR(tb);
+ ath11k_warn(ab, "failed to parse tlv: %d\n", ret);
+ return;
+ }
+
+ ev = tb[WMI_TAG_OBSS_COLOR_COLLISION_EVT];
+ if (!ev) {
+ ath11k_warn(ab, "failed to fetch obss color collision ev");
+ goto exit;
+ }
+
+ arvif = ath11k_mac_get_arvif_by_vdev_id(ab, ev->vdev_id);
+ switch (ev->evt_type) {
+ case WMI_BSS_COLOR_COLLISION_DETECTION:
+ break;
+ case WMI_BSS_COLOR_COLLISION_DISABLE:
+ case WMI_BSS_COLOR_FREE_SLOT_TIMER_EXPIRY:
+ case WMI_BSS_COLOR_FREE_SLOT_AVAILABLE:
+ return;
tb should be freed here.
-Rajkumar
