mac80211: introduce individual TWT support in AP mode

Introduce TWT action frames parsing support to mac80211.
Currently just individual TWT agreement are support in AP mode.
Whenever the AP receives a TWT action frame from an associated client,
after performing sanity checks, it will notify the underlay driver with
requested parameters in order to check if they are supported and if there
is enough room for a new agreement. The driver is expected to set the
agreement result and report it to mac80211.

Drivers supporting this have two new callbacks:
 - add_twt_setup (mandatory)
 - twt_teardown_request (optional)

mac80211 will send an action frame reply according to the result
reported by the driver.

Tested-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/257512f2e22ba42b9f2624942a128dd8f141de4b.1629741512.git.lorenzo@kernel.org
[use le16p_replace_bits(), minor cleanups, use (void *) casts,
 fix to use ieee80211_get_he_iftype_cap() correctly]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index f6ef15366938..9e8381bef7ed 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -2825,6 +2825,73 @@ DEFINE_EVENT(sta_flag_evt, drv_sta_set_decap_offload,
 	TP_ARGS(local, sdata, sta, enabled)
 );
 
+TRACE_EVENT(drv_add_twt_setup,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta,
+		 struct ieee80211_twt_setup *twt,
+		 struct ieee80211_twt_params *twt_agrt),
+
+	TP_ARGS(local, sta, twt, twt_agrt),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(u8, dialog_token)
+		__field(u8, control)
+		__field(__le16, req_type)
+		__field(__le64, twt)
+		__field(u8, duration)
+		__field(__le16, mantissa)
+		__field(u8, channel)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->dialog_token = twt->dialog_token;
+		__entry->control = twt->control;
+		__entry->req_type = twt_agrt->req_type;
+		__entry->twt = twt_agrt->twt;
+		__entry->duration = twt_agrt->min_twt_dur;
+		__entry->mantissa = twt_agrt->mantissa;
+		__entry->channel = twt_agrt->channel;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT
+		" token:%d control:0x%02x req_type:0x%04x"
+		" twt:%llu duration:%d mantissa:%d channel:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->dialog_token,
+		__entry->control, le16_to_cpu(__entry->req_type),
+		le64_to_cpu(__entry->twt), __entry->duration,
+		le16_to_cpu(__entry->mantissa), __entry->channel
+	)
+);
+
+TRACE_EVENT(drv_twt_teardown_request,
+	TP_PROTO(struct ieee80211_local *local,
+		 struct ieee80211_sta *sta, u8 flowid),
+
+	TP_ARGS(local, sta, flowid),
+
+	TP_STRUCT__entry(
+		LOCAL_ENTRY
+		STA_ENTRY
+		__field(u8, flowid)
+	),
+
+	TP_fast_assign(
+		LOCAL_ASSIGN;
+		STA_ASSIGN;
+		__entry->flowid = flowid;
+	),
+
+	TP_printk(
+		LOCAL_PR_FMT STA_PR_FMT " flowid:%d",
+		LOCAL_PR_ARG, STA_PR_ARG, __entry->flowid
+	)
+);
+
 #endif /* !__MAC80211_DRIVER_TRACE || TRACE_HEADER_MULTI_READ */
 
 #undef TRACE_INCLUDE_PATH