C++ (Cpp) minstrel_calc_retransmit Examples

Example #1

File: rc80211_minstrel_ht.c Project: Anjali05/linux

static void
minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
                     struct ieee80211_sta_rates *ratetbl, int offset, int index)
{
	const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
	struct minstrel_rate_stats *mrs;
	u8 idx;
	u16 flags = group->flags;

	mrs = minstrel_get_ratestats(mi, index);
	if (!mrs->retry_updated)
		minstrel_calc_retransmit(mp, mi, index);

	if (mrs->prob_ewma < MINSTREL_FRAC(20, 100) || !mrs->retry_count) {
		ratetbl->rate[offset].count = 2;
		ratetbl->rate[offset].count_rts = 2;
		ratetbl->rate[offset].count_cts = 2;
	} else {
		ratetbl->rate[offset].count = mrs->retry_count;
		ratetbl->rate[offset].count_cts = mrs->retry_count;
		ratetbl->rate[offset].count_rts = mrs->retry_count_rtscts;
	}

	if (index / MCS_GROUP_RATES == MINSTREL_CCK_GROUP)
		idx = mp->cck_rates[index % ARRAY_SIZE(mp->cck_rates)];
	else if (flags & IEEE80211_TX_RC_VHT_MCS)
		idx = ((group->streams - 1) << 4) |
		      ((index % MCS_GROUP_RATES) & 0xF);
	else
		idx = index % MCS_GROUP_RATES + (group->streams - 1) * 8;

	/* enable RTS/CTS if needed:
	 *  - if station is in dynamic SMPS (and streams > 1)
	 *  - for fallback rates, to increase chances of getting through
	 */
	if (offset > 0 ||
	    (mi->sta->smps_mode == IEEE80211_SMPS_DYNAMIC &&
	     group->streams > 1)) {
		ratetbl->rate[offset].count = ratetbl->rate[offset].count_rts;
		flags |= IEEE80211_TX_RC_USE_RTS_CTS;
	}

	ratetbl->rate[offset].idx = idx;
	ratetbl->rate[offset].flags = flags;
}

Example #2

File: rc80211_minstrel_ht.c Project: sztony/wink-hub-kernel-public

static void
minstrel_ht_set_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi,
                     struct ieee80211_sta_rates *ratetbl, int offset, int index)
{
	const struct mcs_group *group = &minstrel_mcs_groups[index / MCS_GROUP_RATES];
	struct minstrel_rate_stats *mr;
	u8 idx;
	u16 flags;

	mr = minstrel_get_ratestats(mi, index);
	if (!mr->retry_updated)
		minstrel_calc_retransmit(mp, mi, index);

	if (mr->probability < MINSTREL_FRAC(20, 100) || !mr->retry_count) {
		ratetbl->rate[offset].count = 2;
		ratetbl->rate[offset].count_rts = 2;
		ratetbl->rate[offset].count_cts = 2;
	} else {
		ratetbl->rate[offset].count = mr->retry_count;
		ratetbl->rate[offset].count_cts = mr->retry_count;
		ratetbl->rate[offset].count_rts = mr->retry_count_rtscts;
	}

	if (index / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
		idx = mp->cck_rates[index % ARRAY_SIZE(mp->cck_rates)];
		flags = 0;
	} else {
		idx = index % MCS_GROUP_RATES +
		      (group->streams - 1) * MCS_GROUP_RATES;
		flags = IEEE80211_TX_RC_MCS | group->flags;
	}

	if (offset > 0) {
		ratetbl->rate[offset].count = ratetbl->rate[offset].count_rts;
		flags |= IEEE80211_TX_RC_USE_RTS_CTS;
	}

	ratetbl->rate[offset].idx = idx;
	ratetbl->rate[offset].flags = flags;
}