Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright 2011-2012, Pavel Zubarev <pavel.zubarev@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright 2011-2012, Marco Porsch <marco.porsch@s2005.tu-chemnitz.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2011-2012, cozybit Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include "ieee80211_i.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include "mesh.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include "driver-ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /* This is not in the standard.  It represents a tolerable tsf drift below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * which we do no TSF adjustment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define TOFFSET_MINIMUM_ADJUSTMENT 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) /* This is not in the standard. It is a margin added to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * Toffset setpoint to mitigate TSF overcorrection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  * introduced by TSF adjustment latency.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define TOFFSET_SET_MARGIN 20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) /* This is not in the standard.  It represents the maximum Toffset jump above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * which we'll invalidate the Toffset setpoint and choose a new setpoint.  This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * could be, for instance, in case a neighbor is restarted and its TSF counter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define TOFFSET_MAXIMUM_ADJUSTMENT 800		/* 0.8 ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) struct sync_method {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	u8 method;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct ieee80211_mesh_sync_ops ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * mesh_peer_tbtt_adjusting - check if an mp is currently adjusting its TBTT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  * @ie: information elements of a management frame from the mesh peer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static bool mesh_peer_tbtt_adjusting(struct ieee802_11_elems *ie)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	return (ie->mesh_config->meshconf_cap &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/* sdata->vif.bss_conf.beacon_int in 1024us units, 0.04% */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	u64 beacon_int_fraction = sdata->vif.bss_conf.beacon_int * 1024 / 2500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	u64 tsf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	u64 tsfdelta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	spin_lock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (ifmsh->sync_offset_clockdrift_max < beacon_int_fraction) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		msync_dbg(sdata, "TSF : max clockdrift=%lld; adjusting\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			  (long long) ifmsh->sync_offset_clockdrift_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		tsfdelta = -ifmsh->sync_offset_clockdrift_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		ifmsh->sync_offset_clockdrift_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		msync_dbg(sdata, "TSF : max clockdrift=%lld; adjusting by %llu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			  (long long) ifmsh->sync_offset_clockdrift_max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			  (unsigned long long) beacon_int_fraction);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		tsfdelta = -beacon_int_fraction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		ifmsh->sync_offset_clockdrift_max -= beacon_int_fraction;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	spin_unlock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	if (local->ops->offset_tsf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		drv_offset_tsf(local, sdata, tsfdelta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		tsf = drv_get_tsf(local, sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		if (tsf != -1ULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			drv_set_tsf(local, sdata, tsf + tsfdelta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 				   u16 stype,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 				   struct ieee80211_mgmt *mgmt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 				   struct ieee802_11_elems *elems,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 				   struct ieee80211_rx_status *rx_status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct ieee80211_local *local = sdata->local;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	struct sta_info *sta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	u64 t_t, t_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	/* standard mentions only beacons */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (stype != IEEE80211_STYPE_BEACON)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	 * Get time when timestamp field was received.  If we don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	 * have rx timestamps, then use current tsf as an approximation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	 * drv_get_tsf() must be called before entering the rcu-read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	 * section.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (ieee80211_have_rx_timestamp(rx_status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		t_r = ieee80211_calculate_rx_timestamp(local, rx_status,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 						       24 + 12 +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 						       elems->total_len +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 						       FCS_LEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 						       24);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		t_r = drv_get_tsf(local, sdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	rcu_read_lock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	sta = sta_info_get(sdata, mgmt->sa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	if (!sta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		goto no_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	/* check offset sync conditions (13.13.2.2.1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	 * TODO also sync to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	 * dot11MeshNbrOffsetMaxNeighbor non-peer non-MBSS neighbors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	if (elems->mesh_config && mesh_peer_tbtt_adjusting(elems)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		msync_dbg(sdata, "STA %pM : is adjusting TBTT\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			  sta->sta.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		goto no_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	/* Timing offset calculation (see 13.13.2.2.2) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	t_t = le64_to_cpu(mgmt->u.beacon.timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	sta->mesh->t_offset = t_t - t_r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (test_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		s64 t_clockdrift = sta->mesh->t_offset_setpoint - sta->mesh->t_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		msync_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			  "STA %pM : t_offset=%lld, t_offset_setpoint=%lld, t_clockdrift=%lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 			  sta->sta.addr, (long long) sta->mesh->t_offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			  (long long) sta->mesh->t_offset_setpoint,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 			  (long long) t_clockdrift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (t_clockdrift > TOFFSET_MAXIMUM_ADJUSTMENT ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		    t_clockdrift < -TOFFSET_MAXIMUM_ADJUSTMENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			msync_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 				  "STA %pM : t_clockdrift=%lld too large, setpoint reset\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 				  sta->sta.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				  (long long) t_clockdrift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			clear_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			goto no_sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		spin_lock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		if (t_clockdrift > ifmsh->sync_offset_clockdrift_max)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			ifmsh->sync_offset_clockdrift_max = t_clockdrift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		spin_unlock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		sta->mesh->t_offset_setpoint = sta->mesh->t_offset - TOFFSET_SET_MARGIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		set_sta_flag(sta, WLAN_STA_TOFFSET_KNOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		msync_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			  "STA %pM : offset was invalid, t_offset=%lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			  sta->sta.addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			  (long long) sta->mesh->t_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) no_sync:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	rcu_read_unlock();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void mesh_sync_offset_adjust_tsf(struct ieee80211_sub_if_data *sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 					 struct beacon_data *beacon)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	WARN_ON(ifmsh->mesh_sp_id != IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	WARN_ON(!rcu_read_lock_held());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	spin_lock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (ifmsh->sync_offset_clockdrift_max > TOFFSET_MINIMUM_ADJUSTMENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		/* Since ajusting the tsf here would
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		 * require a possibly blocking call
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		 * to the driver tsf setter, we punt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		 * the tsf adjustment to the mesh tasklet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		msync_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			  "TSF : kicking off TSF adjustment with clockdrift_max=%lld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			  ifmsh->sync_offset_clockdrift_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		set_bit(MESH_WORK_DRIFT_ADJUST, &ifmsh->wrkq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		msync_dbg(sdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 			  "TSF : max clockdrift=%lld; too small to adjust\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			  (long long)ifmsh->sync_offset_clockdrift_max);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		ifmsh->sync_offset_clockdrift_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	spin_unlock_bh(&ifmsh->sync_offset_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) static const struct sync_method sync_methods[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		.method = IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		.ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 			.rx_bcn_presp = &mesh_sync_offset_rx_bcn_presp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 			.adjust_tsf = &mesh_sync_offset_adjust_tsf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) const struct ieee80211_mesh_sync_ops *ieee80211_mesh_sync_ops_get(u8 method)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	for (i = 0 ; i < ARRAY_SIZE(sync_methods); ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		if (sync_methods[i].method == method)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 			return &sync_methods[i].ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }