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iwlwifi: mvm: don't enable A-MSDU when the rates are too low 

Allow A-MSDU only when we are not downscaling and the
initial MCS is at least 5.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Emmanuel Grumbach 2015-10-28 09:47:41 +02:00
parent 9e7dce2865
commit 04e3a5da6b
3 changed files with 26 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/net/wireless/intel/iwlwifi/mvm/rs.c
View File

@ -1673,6 +1673,20 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta, bool force_search)
}
}
static void rs_set_amsdu_len(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
struct iwl_scale_tbl_info *tbl,
enum rs_action scale_action)
{
struct iwl_mvm_sta *sta_priv = iwl_mvm_sta_from_mac80211(sta);
if ((!is_vht(&tbl->rate) && !is_ht(&tbl->rate)) ||
tbl->rate.index < IWL_RATE_MCS_5_INDEX ||
scale_action == RS_ACTION_DOWNSCALE)
sta_priv->tlc_amsdu = false;
else
sta_priv->tlc_amsdu = true;
}
/*
* setup rate table in uCode
*/
@ -2416,6 +2430,7 @@ static void rs_rate_scale_perform(struct iwl_mvm *mvm,
tbl->rate.index = index;
if (IWL_MVM_RS_80_20_FAR_RANGE_TWEAK)
rs_tweak_rate_tbl(mvm, sta, lq_sta, tbl, scale_action);
rs_set_amsdu_len(mvm, sta, tbl, scale_action);
rs_update_rate_tbl(mvm, sta, lq_sta, tbl);
}
@ -3099,6 +3114,7 @@ void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
sband = hw->wiphy->bands[band];
lq_sta->lq.sta_id = sta_priv->sta_id;
sta_priv->tlc_amsdu = false;
for (j = 0; j < LQ_SIZE; j++)
rs_rate_scale_clear_tbl_windows(mvm, &lq_sta->lq_info[j]);
@ -3658,10 +3674,13 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
ssize_t ret;
struct iwl_lq_sta *lq_sta = file->private_data;
struct iwl_mvm_sta *mvmsta =
container_of(lq_sta, struct iwl_mvm_sta, lq_sta);
struct iwl_mvm *mvm;
struct iwl_scale_tbl_info *tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
struct rs_rate *rate = &tbl->rate;
u32 ss_params;
mvm = lq_sta->pers.drv;
buff = kmalloc(2048, GFP_KERNEL);
if (!buff)
@ -3687,10 +3706,11 @@ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file,
(is_ht20(rate)) ? "20MHz" :
(is_ht40(rate)) ? "40MHz" :
(is_ht80(rate)) ? "80Mhz" : "BAD BW");
desc += sprintf(buff + desc, " %s %s %s\n",
desc += sprintf(buff + desc, " %s %s %s %s\n",
(rate->sgi) ? "SGI" : "NGI",
(rate->ldpc) ? "LDPC" : "BCC",
(lq_sta->is_agg) ? "AGG on" : "");
(lq_sta->is_agg) ? "AGG on" : "",
(mvmsta->tlc_amsdu) ? "AMSDU on" : "");
}
desc += sprintf(buff+desc, "last tx rate=0x%X\n",
lq_sta->last_rate_n_flags);

2
drivers/net/wireless/intel/iwlwifi/mvm/sta.h
View File

@ -313,6 +313,7 @@ struct iwl_mvm_key_pn {
* @tx_protection: reference counter for controlling the Tx protection.
* @tt_tx_protection: is thermal throttling enable Tx protection?
* @disable_tx: is tx to this STA disabled?
* @tlc_amsdu: true if A-MSDU is allowed
* @agg_tids: bitmap of tids whose status is operational aggregated (IWL_AGG_ON)
* @sleep_tx_count: the number of frames that we told the firmware to let out
* even when that station is asleep. This is useful in case the queue
@ -347,6 +348,7 @@ struct iwl_mvm_sta {
bool tt_tx_protection;
bool disable_tx;
bool tlc_amsdu;
u8 agg_tids;
u8 sleep_tx_count;
};

3
drivers/net/wireless/intel/iwlwifi/mvm/tx.c
View File

@ -460,7 +460,8 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
return -EINVAL;
if (!sta->max_amsdu_len ||
!ieee80211_is_data_qos(hdr->frame_control)) {
!ieee80211_is_data_qos(hdr->frame_control) ||
!mvmsta->tlc_amsdu) {
num_subframes = 1;
pad = 0;
goto segment;