cfg80211: Add support to calculate and report 4096-QAM HE rates (9c97c88d) · Commits · 戴 / test

Drivers supporting 4096-QAM rates as a vendor extension in HE mode need to update the correct rate info to userspace while using 4096-QAM (MCS12 and MCS13) in HE mode. Add support to calculate bitrates of HE-MCS12 and HE-MCS13 which represent the 4096-QAM modulation schemes. The MCS12 and MCS13 bitrates are defined in IEEE P802.11be/D0.1. In addition, scale up the bitrates by 3*2048 in order to accommodate calculations for the new MCS12 and MCS13 rates without losing fraction values. Signed-off-by:

Vamsi Krishna <vamsin@codeaurora.org> Signed-off-by:

Jouni Malinen <jouni@codeaurora.org> Link: https://lore.kernel.org/r/20201029183457.7005-1-jouni@codeaurora.org Signed-off-by:

Johannes Berg <johannes.berg@intel.com>

net/wireless/util.c

+17 −15

Original line number	Diff line number	Diff line
		@@ -1276,20 +1276,22 @@ static u32 cfg80211_calculate_bitrate_vht(struct rate_info *rate)

		static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
		{
		#define SCALE 2048
		u16 mcs_divisors[12] = {
		34133, /* 16.666666... */
		17067, /* 8.333333... */
		11378, /* 5.555555... */
		8533, /* 4.166666... */
		5689, /* 2.777777... */
		4267, /* 2.083333... */
		3923, /* 1.851851... */
		3413, /* 1.666666... */
		2844, /* 1.388888... */
		2560, /* 1.250000... */
		2276, /* 1.111111... */
		2048, /* 1.000000... */
		#define SCALE 6144
		u32 mcs_divisors[14] = {
		102399, /* 16.666666... */
		51201, /* 8.333333... */
		34134, /* 5.555555... */
		25599, /* 4.166666... */
		17067, /* 2.777777... */
		12801, /* 2.083333... */
		11769, /* 1.851851... */
		10239, /* 1.666666... */
		8532, /* 1.388888... */
		7680, /* 1.250000... */
		6828, /* 1.111111... */
		6144, /* 1.000000... */
		5690, /* 0.926106... */
		5120, /* 0.833333... */
		};
		u32 rates_160M[3] = { 960777777, 907400000, 816666666 };
		u32 rates_969[3] = { 480388888, 453700000, 408333333 };
		@@ -1301,7 +1303,7 @@ static u32 cfg80211_calculate_bitrate_he(struct rate_info *rate)
		u64 tmp;
		u32 result;

		if (WARN_ON_ONCE(rate->mcs > 11))
		if (WARN_ON_ONCE(rate->mcs > 13))
		return 0;

		if (WARN_ON_ONCE(rate->he_gi > NL80211_RATE_INFO_HE_GI_3_2))

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