recipes-wifi/linux-mac80211/files/patches-6.x/subsys/0016-mtk-mac80211-track-obss-color-bitmap.patch

From 71be2e718dc884fb35433338dc21d6547b237819 Mon Sep 17 00:00:00 2001
From: Yi-Chia Hsieh <yi-chia.hsieh@mediatek.com>
Date: Mon, 13 Mar 2023 05:23:37 +0800
Subject: [PATCH 16/61] mtk: mac80211: track obss color bitmap

Track OBSS BSS color when receive their beacon.

Adding 2 tracepoint for debug, usage:
echo 1 > /sys/kernel/debug/tracing/events/mac80211/bss_color_bitmap/enable
echo 1 > /sys/kernel/debug/tracing/events/mac80211/bss_color_collision/enable

Change-Id: I24ebcc3181c05476b41107ce8fe7f3d4c8907e81
---
 include/net/mac80211.h |  1 +
 net/mac80211/rx.c      |  6 +++++-
 net/mac80211/trace.h   | 22 ++++++++++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 01cfcc0..965a026 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -762,6 +762,7 @@ struct ieee80211_bss_conf {
 	} he_oper;
 	struct ieee80211_he_obss_pd he_obss_pd;
 	struct cfg80211_he_bss_color he_bss_color;
+	u64 used_color_bitmap;
 	struct ieee80211_fils_discovery fils_discovery;
 	u32 unsol_bcast_probe_resp_interval;
 	struct cfg80211_bitrate_mask beacon_tx_rate;
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 89a1199..65982a6 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3395,9 +3395,13 @@ ieee80211_rx_check_bss_color_collision(struct ieee80211_rx_data *rx)
 
 		color = le32_get_bits(he_oper->he_oper_params,
 				      IEEE80211_HE_OPERATION_BSS_COLOR_MASK);
+
+		bss_conf->used_color_bitmap |= BIT_ULL(color);
+
+		// trace_bss_color_bitmap(color, bss_conf->used_color_bitmap);
 		if (color == bss_conf->he_bss_color.color)
 			ieee80211_obss_color_collision_notify(&rx->sdata->vif,
-							      BIT_ULL(color));
+							      bss_conf->used_color_bitmap);
 	}
 }
 
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index 8e758b5..9ec45ce 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -3145,6 +3145,28 @@ TRACE_EVENT(drv_neg_ttlm_res,
 		  LOCAL_PR_ARG, VIF_PR_ARG, __entry->res
 	)
 );
+
+TRACE_EVENT(bss_color_bitmap,
+	TP_PROTO(u8 color,
+		u64 color_bitmap),
+
+	TP_ARGS(color, color_bitmap),
+
+	TP_STRUCT__entry(
+		__field(u8, color)
+		__field(u64, color_bitmap)
+	),
+
+	TP_fast_assign(
+		__entry->color = color;
+		__entry->color_bitmap = color_bitmap;
+	),
+
+	TP_printk(
+		"color=%u color_bitmap=0x%llx", __entry->color, __entry->color_bitmap
+	)
+);
+
 #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
 
 #undef TRACE_INCLUDE_PATH
-- 
2.39.2