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authorJouni Malinen <jouni.malinen@atheros.com>2008-12-12 14:38:33 +0200
committerJohn W. Linville <linville@tuxdriver.com>2008-12-19 15:23:04 -0500
commit0fb8ca45eb164c405eef8978f26829f9348b4d4d (patch)
tree1fc5728b225e7d5a0d06bb0700c83d64bde44f82 /net/mac80211
parent9d8eed12dbc04f8ed70090da14211c808b5a8d81 (diff)
downloadlinux-0fb8ca45eb164c405eef8978f26829f9348b4d4d.tar.bz2
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>
Diffstat (limited to 'net/mac80211')
-rw-r--r--net/mac80211/mlme.c7
-rw-r--r--net/mac80211/rx.c56
2 files changed, 52 insertions, 11 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e4d1fca5c72d..a444b38f4901 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1613,8 +1613,13 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
* e.g: at 1 MBit that means mactime is 192 usec earlier
* (=24 bytes * 8 usecs/byte) than the beacon timestamp.
*/
- int rate = local->hw.wiphy->bands[band]->
+ int rate;
+ if (rx_status->flag & RX_FLAG_HT) {
+ rate = 65; /* TODO: HT rates */
+ } else {
+ rate = local->hw.wiphy->bands[band]->
bitrates[rx_status->rate_idx].bitrate;
+ }
rx_timestamp = rx_status->mactime + (24 * 8 * 10 / rate);
} else if (local && local->ops && local->ops->get_tsf)
/* second best option: get current TSF */
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 73cf126cef49..b729c005a2b3 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -149,7 +149,17 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
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 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
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 @@ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
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 @@ static u8 ieee80211_sta_manage_reorder_buf(struct ieee80211_hw *hw,
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 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
}
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