From: Javier Cardona <[email protected]>
Signed-off-by: Javier Cardona <[email protected]>
Reviewed-by: Jason Abele <[email protected]>
---
net/mac80211/mesh_hwmp.c | 58 +++++++++++++++++++++-------------------------
1 file changed, 27 insertions(+), 31 deletions(-)
diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c
index bb32203..86fc9e5 100644
--- a/net/mac80211/mesh_hwmp.c
+++ b/net/mac80211/mesh_hwmp.c
@@ -338,38 +338,20 @@ static unsigned int rssi_get_rate(struct sta_info *sta)
enum ieee80211_band band = sta->local->oper_channel->band;
struct ieee80211_sta_ht_cap *ht_cap = &sta->sta.ht_cap;
struct rate_info rinfo;
- int i, ridx, ci = 0;
- int rssi, rate;
- u32 cidx[IEEE80211_MAX_SUPP_RATES];
+ int i, rssi, rate, rate_max, rate_min = 10, maxidx = 0;
+ const int rssi_min = -100;
+ const int rssi_max = -20;
if (sta->last_signal >= 0)
- return 0;
+ return rate_min;
memset(&rinfo, sizeof(rinfo), 0);
- /* make rates contiguous */
- for (i = 0; i < IEEE80211_MAX_SUPP_RATES; i++) {
- if (ht_cap->ht_supported &&
- !(ht_cap->mcs.rx_mask[i / 8] & (i % 8)))
- continue;
-
- if (!(sta->sta.supp_rates[band] & BIT(i)))
- continue;
-
- cidx[ci++] = i;
- }
-
- /* map rssi in range 20 - 70 to rates 32 - 0 */
-#define RSSI_OFF 20
-#define RSSI_MAX 50
- rssi = abs(sta->last_signal) - RSSI_OFF;
- rssi = max(rssi, 0);
- rssi = min(rssi, RSSI_MAX);
- /* invert rssi against ci and get the supported nth rate */
- /* TODO: make this non-linear */
- ridx = cidx[min((int)(ci * (1 - ((float) rssi / RSSI_MAX))), ci)];
-
if (ht_cap->ht_supported) {
+ for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
+ if (ht_cap->mcs.rx_mask[i])
+ maxidx = i*8 + fls(ht_cap->mcs.rx_mask[i]) - 1;
+ }
rinfo.flags |= RATE_INFO_FLAGS_MCS;
rinfo.flags |= (sta->sta.ht_cap.cap &
IEEE80211_HT_CAP_SUP_WIDTH_20_40) ?
@@ -380,18 +362,32 @@ static unsigned int rssi_get_rate(struct sta_info *sta)
IEEE80211_HT_CAP_SGI_40)) ?
RATE_INFO_FLAGS_SHORT_GI :
0;
- rinfo.mcs = ridx;
+ rinfo.mcs = maxidx;
} else {
struct ieee80211_supported_band *sband;
+
+ maxidx = fls(sta->sta.supp_rates[band]) - 1;
+ if (WARN_ON(maxidx < 0))
+ return rate_min;
sband = sta->local->hw.wiphy->bands[band];
- rinfo.legacy = sband->bitrates[ridx].bitrate;
+ rinfo.legacy = sband->bitrates[maxidx].bitrate;
}
- rate = cfg80211_calculate_bitrate(&rinfo);
+ rate_max = cfg80211_calculate_bitrate(&rinfo);
+
+ rssi = max(rssi_min, sta->last_signal);
+ rssi = min(rssi_max, rssi);
+
+ rate = ((rssi - rssi_min) * rate_max +
+ (rssi_max - rssi) * rate_min) /
+ (rssi_max - rssi_min);
+
if (WARN_ON(!rate))
- rate = 10;
- mhwmp_dbg("est. %d Mbps for %pM with rssi %d\n",
+ rate = rate_min;
+
+ mhwmp_dbg("\nest. %d Mbps for %pM with rssi %d\n",
rate/10, sta->sta.addr, sta->last_signal);
+
return rate;
}
--
1.7.9.5
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