[PATCH AUTOSEL 5.4 09/32] iwlwifi: mvm: Fix rate scale NSS configuration

Sasha Levin
2020-04-07T00:07:00Z

From: Ilan Peer <ilan.peer@intel.com>

[ Upstream commit ce19801ba75a902ab515dda03b57738c708d0781 ]

The TLC configuration did not take into consideration the station's
SMPS configuration, and thus configured rates for 2 NSS even if
static SMPS was reported by the station. Fix this.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20200306151129.b4f940d13eca.Ieebfa889d08205a3a961ae0138fb5832e8a0f9c1@changeid
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/wireless/intel/iwlwifi/mvm/rs-fw.c | 29 ++++++++++++++-----
1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
index 24df3182ec9eb..5b2bd603febfc 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rs-fw.c
@@ -6,7 +6,7 @@
* GPL LICENSE SUMMARY
*
* Copyright(c) 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
@@ -27,7 +27,7 @@
* BSD LICENSE
*
* Copyright(c) 2017 Intel Deutschland GmbH
- * Copyright(c) 2018 - 2019 Intel Corporation
+ * Copyright(c) 2018 - 2020 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -195,11 +195,13 @@ rs_fw_vht_set_enabled_rates(const struct ieee80211_sta *sta,
{
u16 supp;
int i, highest_mcs;
+ u8 nss = sta->rx_nss;

- for (i = 0; i < sta->rx_nss; i++) {
- if (i == IWL_TLC_NSS_MAX)
- break;
+ /* the station support only a single receive chain */
+ if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+ nss = 1;

+ for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
if (!highest_mcs)
continue;
@@ -245,8 +247,13 @@ rs_fw_he_set_enabled_rates(const struct ieee80211_sta *sta,
u16 tx_mcs_160 =
le16_to_cpu(sband->iftype_data->he_cap.he_mcs_nss_supp.tx_mcs_160);
int i;
+ u8 nss = sta->rx_nss;

- for (i = 0; i < sta->rx_nss && i < IWL_TLC_NSS_MAX; i++) {
+ /* the station support only a single receive chain */
+ if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+ nss = 1;
+
+ for (i = 0; i < nss && i < IWL_TLC_NSS_MAX; i++) {
u16 _mcs_160 = (mcs_160 >> (2 * i)) & 0x3;
u16 _mcs_80 = (mcs_80 >> (2 * i)) & 0x3;
u16 _tx_mcs_160 = (tx_mcs_160 >> (2 * i)) & 0x3;
@@ -307,8 +314,14 @@ static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
cmd->mode = IWL_TLC_MNG_MODE_HT;
cmd->ht_rates[IWL_TLC_NSS_1][IWL_TLC_HT_BW_NONE_160] =
cpu_to_le16(ht_cap->mcs.rx_mask[0]);
- cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
- cpu_to_le16(ht_cap->mcs.rx_mask[1]);
+
+ /* the station support only a single receive chain */
+ if (sta->smps_mode == IEEE80211_SMPS_STATIC)
+ cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
+ 0;
+ else
+ cmd->ht_rates[IWL_TLC_NSS_2][IWL_TLC_HT_BW_NONE_160] =
+ cpu_to_le16(ht_cap->mcs.rx_mask[1]);
}
}

--
2.20.1