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Commit 95ddc1fc authored by Vladimir Kondratiev's avatar Vladimir Kondratiev Committed by Johannes Berg
Browse files

cfg80211: bitrate calculation for 60g 



60g band uses different from .11n MCS scheme, so bitrate
should be calculated differently

Signed-off-by: default avatarVladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 8eb41c8d

include/net/cfg80211.h

+2 −0
Original line number Diff line number Diff line
@@ -580,11 +580,13 @@ enum station_info_flags { 
 * @RATE_INFO_FLAGS_MCS: @tx_bitrate_mcs filled

 * @RATE_INFO_FLAGS_40_MHZ_WIDTH: 40 Mhz width transmission

 * @RATE_INFO_FLAGS_SHORT_GI: 400ns guard interval

 * @RATE_INFO_FLAGS_60G: 60gHz MCS

 */

enum rate_info_flags {

	RATE_INFO_FLAGS_MCS		= 1<<0,

	RATE_INFO_FLAGS_40_MHZ_WIDTH	= 1<<1,

	RATE_INFO_FLAGS_SHORT_GI	= 1<<2,

	RATE_INFO_FLAGS_60G		= 1<<3,

};



/**

net/wireless/util.c

+49 −0
Original line number Diff line number Diff line
@@ -900,12 +900,61 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 
	return err;

}



static u32 cfg80211_calculate_bitrate_60g(struct rate_info *rate)

{

	static const u32 __mcs2bitrate[] = {

		/* control PHY */

		[0] =   275,

		/* SC PHY */

		[1] =  3850,

		[2] =  7700,

		[3] =  9625,

		[4] = 11550,

		[5] = 12512, /* 1251.25 mbps */

		[6] = 15400,

		[7] = 19250,

		[8] = 23100,

		[9] = 25025,

		[10] = 30800,

		[11] = 38500,

		[12] = 46200,

		/* OFDM PHY */

		[13] =  6930,

		[14] =  8662, /* 866.25 mbps */

		[15] = 13860,

		[16] = 17325,

		[17] = 20790,

		[18] = 27720,

		[19] = 34650,

		[20] = 41580,

		[21] = 45045,

		[22] = 51975,

		[23] = 62370,

		[24] = 67568, /* 6756.75 mbps */

		/* LP-SC PHY */

		[25] =  6260,

		[26] =  8340,

		[27] = 11120,

		[28] = 12510,

		[29] = 16680,

		[30] = 22240,

		[31] = 25030,

	};



	if (WARN_ON_ONCE(rate->mcs >= ARRAY_SIZE(__mcs2bitrate)))

		return 0;



	return __mcs2bitrate[rate->mcs];

}



u32 cfg80211_calculate_bitrate(struct rate_info *rate)

{

	int modulation, streams, bitrate;



	if (!(rate->flags & RATE_INFO_FLAGS_MCS))

		return rate->legacy;

	if (rate->flags & RATE_INFO_FLAGS_60G)

		return cfg80211_calculate_bitrate_60g(rate);



	/* the formula below does only work for MCS values smaller than 32 */

	if (WARN_ON_ONCE(rate->mcs >= 32))