mac80211: Add HT rates into RX status reporting
This patch adds option for HT-enabled drivers to report HT rates
(HT20/HT40, short GI, MCS index) to mac80211. These rates are
currently not in the rate table, so the rate_idx is used to indicate
MCS index.
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 73cf126..b729c00 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -149,7 +149,17 @@
pos++;
/* IEEE80211_RADIOTAP_RATE */
- *pos = rate->bitrate / 5;
+ if (status->flag & RX_FLAG_HT) {
+ /*
+ * TODO: add following information into radiotap header once
+ * suitable fields are defined for it:
+ * - MCS index (status->rate_idx)
+ * - HT40 (status->flag & RX_FLAG_40MHZ)
+ * - short-GI (status->flag & RX_FLAG_SHORT_GI)
+ */
+ *pos = 0;
+ } else
+ *pos = rate->bitrate / 5;
pos++;
/* IEEE80211_RADIOTAP_CHANNEL */
@@ -1849,9 +1859,15 @@
if (!(sdata->dev->flags & IFF_PROMISC))
return 0;
rx->flags &= ~IEEE80211_RX_RA_MATCH;
- } else if (!rx->sta)
+ } else if (!rx->sta) {
+ int rate_idx;
+ if (rx->status->flag & RX_FLAG_HT)
+ rate_idx = 0; /* TODO: HT rates */
+ else
+ rate_idx = rx->status->rate_idx;
rx->sta = ieee80211_ibss_add_sta(sdata, bssid, hdr->addr2,
- BIT(rx->status->rate_idx));
+ BIT(rate_idx));
+ }
break;
case NL80211_IFTYPE_MESH_POINT:
if (!multicast &&
@@ -2057,7 +2073,13 @@
tid_agg_rx->reorder_buf[index]->cb,
sizeof(status));
sband = local->hw.wiphy->bands[status.band];
- rate = &sband->bitrates[status.rate_idx];
+ if (status.flag & RX_FLAG_HT) {
+ /* TODO: HT rates */
+ rate = sband->bitrates;
+ } else {
+ rate = &sband->bitrates
+ [status.rate_idx];
+ }
__ieee80211_rx_handle_packet(hw,
tid_agg_rx->reorder_buf[index],
&status, rate);
@@ -2101,7 +2123,10 @@
memcpy(&status, tid_agg_rx->reorder_buf[index]->cb,
sizeof(status));
sband = local->hw.wiphy->bands[status.band];
- rate = &sband->bitrates[status.rate_idx];
+ if (status.flag & RX_FLAG_HT)
+ rate = sband->bitrates; /* TODO: HT rates */
+ else
+ rate = &sband->bitrates[status.rate_idx];
__ieee80211_rx_handle_packet(hw, tid_agg_rx->reorder_buf[index],
&status, rate);
tid_agg_rx->stored_mpdu_num--;
@@ -2189,15 +2214,26 @@
}
sband = local->hw.wiphy->bands[status->band];
-
- if (!sband ||
- status->rate_idx < 0 ||
- status->rate_idx >= sband->n_bitrates) {
+ if (!sband) {
WARN_ON(1);
return;
}
- rate = &sband->bitrates[status->rate_idx];
+ if (status->flag & RX_FLAG_HT) {
+ /* rate_idx is MCS index */
+ if (WARN_ON(status->rate_idx < 0 ||
+ status->rate_idx >= 76))
+ return;
+ /* HT rates are not in the table - use the highest legacy rate
+ * for now since other parts of mac80211 may not yet be fully
+ * MCS aware. */
+ rate = &sband->bitrates[sband->n_bitrates - 1];
+ } else {
+ if (WARN_ON(status->rate_idx < 0 ||
+ status->rate_idx >= sband->n_bitrates))
+ return;
+ rate = &sband->bitrates[status->rate_idx];
+ }
/*
* key references and virtual interfaces are protected using RCU