Airtime link metric estimation was broken in HT mesh, use
cfg80211_calculate_bitrate to get the right rate value.
Also factor out tx rate copying from sta_set_sinfo().
Signed-off-by: Thomas Pedersen <thomas@xxxxxxxxxxx>
---
v2:
factor out rate copying (Johannes)
v3:
just factor out tx rate copying (Johannes)
net/mac80211/cfg.c | 22 ++++++++++++++--------
net/mac80211/mesh_hwmp.c | 6 ++++--
net/mac80211/sta_info.h | 2 ++
3 files changed, 20 insertions(+), 10 deletions(-)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 6a77d4c..9e6accd 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -336,6 +336,19 @@ static void rate_idx_to_bitrate(struct rate_info *rate, struct sta_info *sta, in
rate->mcs = idx;
}
+void sta_set_rate_info(struct sta_info *sta, struct ieee80211_tx_rate rate,
+ struct rate_info *rinfo)
+{
+ rinfo->flags = 0;
+ if (rate.flags & IEEE80211_TX_RC_MCS)
+ rinfo->flags |= RATE_INFO_FLAGS_MCS;
+ if (rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
+ rinfo->flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
+ if (rate.flags & IEEE80211_TX_RC_SHORT_GI)
+ rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;
+ rate_idx_to_bitrate(rinfo, sta, rate.idx);
+}
+
static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
{
struct ieee80211_sub_if_data *sdata = sta->sdata;
@@ -378,14 +391,7 @@ static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);
}
- sinfo->txrate.flags = 0;
- if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
- sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
- if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
- sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
- if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
- sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
- rate_idx_to_bitrate(&sinfo->txrate, sta, sta->last_tx_rate.idx);
+ sta_set_rate_info(sta, sta->last_tx_rate, &sinfo->txrate);
sinfo->rxrate.flags = 0;
if (sta->last_rx_rate_flag & RX_FLAG_HT)
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index 31bc762..ae99f14 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -323,6 +323,7 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
struct sta_info *sta)
{
struct ieee80211_supported_band *sband;
+ struct rate_info rinfo;
/* This should be adjusted for each device */
int device_constant = 1 << ARITH_SHIFT;
int test_frame_len = TEST_FRAME_LEN << ARITH_SHIFT;
@@ -336,7 +337,9 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
if (sta->fail_avg >= 100)
return MAX_METRIC;
- if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
+ sta_set_rate_info(sta, sta->last_tx_rate, &rinfo);
+ rate = cfg80211_calculate_bitrate(&rinfo);
+ if (WARN_ON(!rate))
return MAX_METRIC;
err = (sta->fail_avg << ARITH_SHIFT) / 100;
@@ -344,7 +347,6 @@ static u32 airtime_link_metric_get(struct ieee80211_local *local,
/* bitrate is in units of 100 Kbps, while we need rate in units of
* 1Mbps. This will be corrected on tx_time computation.
*/
- rate = sband->bitrates[sta->last_tx_rate.idx].bitrate;
tx_time = (device_constant + 10 * test_frame_len / rate);
estimated_retx = ((1 << (2 * ARITH_SHIFT)) / (s_unit - err));
result = (tx_time * estimated_retx) >> (2 * ARITH_SHIFT) ;
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 23a97c9..066d2e8 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -528,6 +528,8 @@ void sta_info_init(struct ieee80211_local *local);
void sta_info_stop(struct ieee80211_local *local);
int sta_info_flush(struct ieee80211_local *local,
struct ieee80211_sub_if_data *sdata);
+void sta_set_rate_info(struct sta_info *sta, struct ieee80211_tx_rate rate,
+ struct rate_info *rinfo);
void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
unsigned long exp_time);
--
1.7.5.4
--
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