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Re: [RFC v2 4/6] mac80211: add utility function for tx_rate - rate_info conversion

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> On 12. Jan 2023, at 11:26, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
> 
>> +void ieee80211_rate_get_rate_info(const struct ieee80211_tx_rate *rate,
>> +						struct wiphy *wiphy, u8 band,
>> + 						struct rate_info *rate_info)
>> +{
>> + 	memset(rate_info, 0, sizeof(struct rate_info));
>> +
>> + 	if (rate->flags & IEEE80211_TX_RC_MCS) { /* 802.11n */
>> + 		rate_info->flags |= RATE_INFO_FLAGS_MCS;
>> + 		rate_info->mcs = rate->idx;
>> + 	} else if (rate->flags & IEEE80211_TX_RC_VHT_MCS) { /* 802.11ac */
>> + 		rate_info->flags |= RATE_INFO_FLAGS_VHT_MCS;
>> + 		rate_info->mcs = ieee80211_rate_get_vht_mcs(rate);
>> + 		rate_info->nss = ieee80211_rate_get_vht_nss(rate);
>> + 	} else { /* 802.11a/b/g */
> 
> what about HE/EHT?

ieee80211_tx_rate uses an s8 for rate/MCS index, so only up to VHT rates fit in there.
For rates above VHT, rate_info is needed, thus are are no HE/EHT rates occuring in
ieee80211_tx_rate. Same applies to your comment on the hwsim conversion.

Jonas



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