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Commit dcba665b authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: use bitfield macros for encoded rate 



Instead of hand-coding the bit manipulations, use the bitfield
macros to generate the code for the encoded bitrate.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 8613c948

net/mac80211/sta_info.c

+14 −12
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ 
 * Copyright 2002-2005, Instant802 Networks, Inc.

 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>

 * Copyright 2013-2014  Intel Mobile Communications GmbH

 * Copyright (C) 2015 - 2016 Intel Deutschland GmbH

 * Copyright (C) 2015 - 2017 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
@@ -1957,27 +1957,32 @@ sta_get_last_rx_stats(struct sta_info *sta) 
static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate,

				  struct rate_info *rinfo)

{

	rinfo->bw = (rate & STA_STATS_RATE_BW_MASK) >>

		STA_STATS_RATE_BW_SHIFT;

	rinfo->bw = STA_STATS_GET(BW, rate);



	switch (rate & STA_STATS_RATE_TYPE_MASK) {

	switch (STA_STATS_GET(TYPE, rate)) {

	case STA_STATS_RATE_TYPE_VHT:

		rinfo->flags = RATE_INFO_FLAGS_VHT_MCS;

		rinfo->mcs = rate & 0xf;

		rinfo->nss = (rate & 0xf0) >> 4;

		rinfo->mcs = STA_STATS_GET(VHT_MCS, rate);

		rinfo->nss = STA_STATS_GET(VHT_NSS, rate);

		if (STA_STATS_GET(SGI, rate))

			rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;

		break;

	case STA_STATS_RATE_TYPE_HT:

		rinfo->flags = RATE_INFO_FLAGS_MCS;

		rinfo->mcs = rate & 0xff;

		rinfo->mcs = STA_STATS_GET(HT_MCS, rate);

		if (STA_STATS_GET(SGI, rate))

			rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;

		break;

	case STA_STATS_RATE_TYPE_LEGACY: {

		struct ieee80211_supported_band *sband;

		u16 brate;

		unsigned int shift;

		int band = STA_STATS_GET(LEGACY_BAND, rate);

		int rate_idx = STA_STATS_GET(LEGACY_IDX, rate);



		rinfo->flags = 0;

		sband = local->hw.wiphy->bands[(rate >> 4) & 0xf];

		brate = sband->bitrates[rate & 0xf].bitrate;

		sband = local->hw.wiphy->bands[band];

		brate = sband->bitrates[rate_idx].bitrate;

		if (rinfo->bw == RATE_INFO_BW_5)

			shift = 2;

		else if (rinfo->bw == RATE_INFO_BW_10)
@@ -1988,9 +1993,6 @@ static void sta_stats_decode_rate(struct ieee80211_local *local, u16 rate, 
		break;

		}

	}



	if (rate & STA_STATS_RATE_SGI)

		rinfo->flags |= RATE_INFO_FLAGS_SHORT_GI;

}



static int sta_set_rate_info_rx(struct sta_info *sta, struct rate_info *rinfo)

net/mac80211/sta_info.h

+36 −18
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include <linux/if_ether.h>

#include <linux/workqueue.h>

#include <linux/average.h>

#include <linux/bitfield.h>

#include <linux/etherdevice.h>

#include <linux/rhashtable.h>

#include <linux/u64_stats_sync.h>
@@ -727,37 +728,54 @@ void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); 


unsigned long ieee80211_sta_last_active(struct sta_info *sta);



enum sta_stats_type {

	STA_STATS_RATE_TYPE_INVALID = 0,

	STA_STATS_RATE_TYPE_LEGACY,

	STA_STATS_RATE_TYPE_HT,

	STA_STATS_RATE_TYPE_VHT,

};



#define STA_STATS_FIELD_HT_MCS		GENMASK( 7,  0)

#define STA_STATS_FIELD_LEGACY_IDX	GENMASK( 3,  0)

#define STA_STATS_FIELD_LEGACY_BAND	GENMASK( 7,  4)

#define STA_STATS_FIELD_VHT_MCS		GENMASK( 3,  0)

#define STA_STATS_FIELD_VHT_NSS		GENMASK( 7,  4)

#define STA_STATS_FIELD_BW		GENMASK(11,  8)

#define STA_STATS_FIELD_SGI		GENMASK(12, 12)

#define STA_STATS_FIELD_TYPE		GENMASK(15, 13)



#define STA_STATS_FIELD(_n, _v)		FIELD_PREP(STA_STATS_FIELD_ ## _n, _v)

#define STA_STATS_GET(_n, _v)		FIELD_GET(STA_STATS_FIELD_ ## _n, _v)



#define STA_STATS_RATE_INVALID		0

#define STA_STATS_RATE_TYPE_MASK	0xC000

#define STA_STATS_RATE_TYPE_LEGACY	0x4000

#define STA_STATS_RATE_TYPE_HT		0x8000

#define STA_STATS_RATE_TYPE_VHT		0xC000

#define STA_STATS_RATE_SGI		0x1000

#define STA_STATS_RATE_BW_SHIFT		9

#define STA_STATS_RATE_BW_MASK		(0x7 << STA_STATS_RATE_BW_SHIFT)



static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s)



static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s)

{

	u16 r = s->rate_idx;

	u16 r;



	r |= s->bw << STA_STATS_RATE_BW_SHIFT;

	r = STA_STATS_FIELD(BW, s->bw);



	if (s->enc_flags & RX_ENC_FLAG_SHORT_GI)

		r |= STA_STATS_RATE_SGI;

		r |= STA_STATS_FIELD(SGI, 1);



	switch (s->encoding) {

	case RX_ENC_VHT:

		r |= STA_STATS_RATE_TYPE_VHT | (s->nss << 4);

		r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT);

		r |= STA_STATS_FIELD(VHT_NSS, s->nss);

		r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx);

		break;

	case RX_ENC_HT:

		r |= STA_STATS_RATE_TYPE_HT;

		r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT);

		r |= STA_STATS_FIELD(HT_MCS, s->rate_idx);

		break;

	default:

		WARN_ON(1);

		/* fall through */

	case RX_ENC_LEGACY:

		r |= STA_STATS_RATE_TYPE_LEGACY | (s->band << 4);

		r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY);

		r |= STA_STATS_FIELD(LEGACY_BAND, s->band);

		r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx);

		break;

	default:

		WARN_ON(1);

		return STA_STATS_RATE_INVALID;

	}



	return r;