diff options
| author |   Johannes Berg <johannes.berg@intel.com> | 2016-01-25 15:46:34 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2016-02-24 09:04:27 +0100 |
| commit | f4a0f0c5264e72d9279fbf9cf48a061526e8f788 (patch) | |
| tree | d03e2880bc7f9bb3b946413123e5d753fc8af06e /net/mac80211 | |
| parent | mac80211: fix unnecessary frame drops in mesh fwding (diff) | |
| download | linux-dev-f4a0f0c5264e72d9279fbf9cf48a061526e8f788.tar.xz linux-dev-f4a0f0c5264e72d9279fbf9cf48a061526e8f788.zip | |
mac80211: add RX_FLAG_MACTIME_PLCP_START
The timestamp given by iwlwifi is at the beginning of the
frame over the air, at (or during) the SYNC field. Allow
such timestamps to be given to mac80211, at least (for now)
for frames with non-HT/VHT preambles.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 8 | ||||
| -rw-r--r-- | net/mac80211/util.c | 14 |
2 files changed, 20 insertions, 2 deletions
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 9934447a8b9a..a29f61dc9c06 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -1466,7 +1466,13 @@ ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status) { WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START && status->flag & RX_FLAG_MACTIME_END); - return status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END); + if (status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END)) + return true; + /* can't handle HT/VHT preamble yet */ + if (status->flag & RX_FLAG_MACTIME_PLCP_START && + !(status->flag & (RX_FLAG_HT | RX_FLAG_VHT))) + return true; + return false; } u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 7d0479e31674..fb90d9c5df59 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -4,7 +4,7 @@ * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH - * Copyright (C) 2015 Intel Deutschland GmbH + * Copyright (C) 2015-2016 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -2671,6 +2671,18 @@ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local, sband = local->hw.wiphy->bands[status->band]; bitrate = sband->bitrates[status->rate_idx].bitrate; ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift)); + + if (status->flag & RX_FLAG_MACTIME_PLCP_START) { + /* TODO: handle HT/VHT preambles */ + if (status->band == IEEE80211_BAND_5GHZ) { + ts += 20 << shift; + mpdu_offset += 2; + } else if (status->flag & RX_FLAG_SHORTPRE) { + ts += 96; + } else { + ts += 192; + } + } } rate = cfg80211_calculate_bitrate(&ri); |