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/******************************************************************************
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2017 Intel Deutschland GmbH
*
* 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
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*
* Contact Information:
* Intel Linux Wireless <linuxwifi@intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2017 Intel Deutschland GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include "rs.h"
#include "fw-api.h"
#include "sta.h"
#include "iwl-op-mode.h"
#include "mvm.h"
static u8 rs_fw_bw_from_sta_bw(struct ieee80211_sta *sta)
{
switch (sta->bandwidth) {
case IEEE80211_STA_RX_BW_160:
return IWL_TLC_MNG_MAX_CH_WIDTH_160MHZ;
case IEEE80211_STA_RX_BW_80:
return IWL_TLC_MNG_MAX_CH_WIDTH_80MHZ;
case IEEE80211_STA_RX_BW_40:
return IWL_TLC_MNG_MAX_CH_WIDTH_40MHZ;
case IEEE80211_STA_RX_BW_20:
default:
return IWL_TLC_MNG_MAX_CH_WIDTH_20MHZ;
}
}
static u8 rs_fw_set_active_chains(u8 chains)
{
u8 fw_chains = 0;
if (chains & ANT_A)
fw_chains |= IWL_TLC_MNG_CHAIN_A_MSK;
if (chains & ANT_B)
fw_chains |= IWL_TLC_MNG_CHAIN_B_MSK;
if (chains & ANT_C)
fw_chains |= IWL_TLC_MNG_CHAIN_C_MSK;
return fw_chains;
}
static u8 rs_fw_sgi_cw_support(struct ieee80211_sta *sta)
{
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
u8 supp = 0;
if (ht_cap->cap & IEEE80211_HT_CAP_SGI_20)
supp |= IWL_TLC_MNG_SGI_20MHZ_MSK;
if (ht_cap->cap & IEEE80211_HT_CAP_SGI_40)
supp |= IWL_TLC_MNG_SGI_40MHZ_MSK;
if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_80)
supp |= IWL_TLC_MNG_SGI_80MHZ_MSK;
if (vht_cap->cap & IEEE80211_VHT_CAP_SHORT_GI_160)
supp |= IWL_TLC_MNG_SGI_160MHZ_MSK;
return supp;
}
static u16 rs_fw_set_config_flags(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
bool vht_ena = vht_cap && vht_cap->vht_supported;
u16 flags = IWL_TLC_MNG_CFG_FLAGS_CCK_MSK |
IWL_TLC_MNG_CFG_FLAGS_DCM_MSK |
IWL_TLC_MNG_CFG_FLAGS_DD_MSK;
if (mvm->cfg->ht_params->stbc &&
(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_RX_STBC)) ||
(vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXSTBC_MASK))))
flags |= IWL_TLC_MNG_CFG_FLAGS_STBC_MSK;
if (mvm->cfg->ht_params->ldpc &&
((ht_cap && (ht_cap->cap & IEEE80211_HT_CAP_LDPC_CODING)) ||
(vht_ena && (vht_cap->cap & IEEE80211_VHT_CAP_RXLDPC))))
flags |= IWL_TLC_MNG_CFG_FLAGS_LDPC_MSK;
if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
(num_of_ant(iwl_mvm_get_valid_tx_ant(mvm)) > 1) &&
(vht_cap->cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE))
flags |= IWL_TLC_MNG_CFG_FLAGS_BF_MSK;
return flags;
}
static
int rs_fw_vht_highest_rx_mcs_index(struct ieee80211_sta_vht_cap *vht_cap,
int nss)
{
u16 rx_mcs = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map) &
(0x3 << (2 * (nss - 1)));
rx_mcs >>= (2 * (nss - 1));
switch (rx_mcs) {
case IEEE80211_VHT_MCS_SUPPORT_0_7:
return IWL_TLC_MNG_HT_RATE_MCS7;
case IEEE80211_VHT_MCS_SUPPORT_0_8:
return IWL_TLC_MNG_HT_RATE_MCS8;
case IEEE80211_VHT_MCS_SUPPORT_0_9:
return IWL_TLC_MNG_HT_RATE_MCS9;
default:
WARN_ON_ONCE(1);
break;
}
return 0;
}
static void rs_fw_vht_set_enabled_rates(struct ieee80211_sta *sta,
struct ieee80211_sta_vht_cap *vht_cap,
struct iwl_tlc_config_cmd *cmd)
{
u16 supp;
int i, highest_mcs;
for (i = 0; i < sta->rx_nss; i++) {
if (i == MAX_RS_ANT_NUM)
break;
highest_mcs = rs_fw_vht_highest_rx_mcs_index(vht_cap, i + 1);
if (!highest_mcs)
continue;
supp = BIT(highest_mcs + 1) - 1;
if (sta->bandwidth == IEEE80211_STA_RX_BW_20)
supp &= ~BIT(IWL_TLC_MNG_HT_RATE_MCS9);
cmd->ht_supp_rates[i] = cpu_to_le16(supp);
}
}
static void rs_fw_set_supp_rates(struct ieee80211_sta *sta,
struct ieee80211_supported_band *sband,
struct iwl_tlc_config_cmd *cmd)
{
int i;
unsigned long tmp;
unsigned long supp; /* must be unsigned long for for_each_set_bit */
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
/* non HT rates */
supp = 0;
tmp = sta->supp_rates[sband->band];
for_each_set_bit(i, &tmp, BITS_PER_LONG)
supp |= BIT(sband->bitrates[i].hw_value);
cmd->non_ht_supp_rates = cpu_to_le16(supp);
cmd->mode = IWL_TLC_MNG_MODE_NON_HT;
/* HT/VHT rates */
if (vht_cap && vht_cap->vht_supported) {
cmd->mode = IWL_TLC_MNG_MODE_VHT;
rs_fw_vht_set_enabled_rates(sta, vht_cap, cmd);
} else if (ht_cap && ht_cap->ht_supported) {
cmd->mode = IWL_TLC_MNG_MODE_HT;
cmd->ht_supp_rates[0] = cpu_to_le16(ht_cap->mcs.rx_mask[0]);
cmd->ht_supp_rates[1] = cpu_to_le16(ht_cap->mcs.rx_mask[1]);
}
}
static void rs_fw_tlc_mng_notif_req_config(struct iwl_mvm *mvm, u8 sta_id)
{
u32 cmd_id = iwl_cmd_id(TLC_MNG_NOTIF_REQ_CMD, DATA_PATH_GROUP, 0);
struct iwl_tlc_notif_req_config_cmd cfg_cmd = {
.sta_id = sta_id,
.flags = cpu_to_le16(IWL_TLC_NOTIF_INIT_RATE_MSK),
.interval = cpu_to_le16(IWL_TLC_NOTIF_REQ_INTERVAL),
};
int ret;
ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd);
if (ret)
IWL_ERR(mvm, "Failed to send TLC notif request (%d)\n", ret);
}
void iwl_mvm_tlc_update_notif(struct iwl_mvm *mvm, struct iwl_rx_packet *pkt)
{
struct iwl_tlc_update_notif *notif;
struct iwl_mvm_sta *mvmsta;
struct iwl_lq_sta_rs_fw *lq_sta;
notif = (void *)pkt->data;
mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, notif->sta_id);
if (!mvmsta) {
IWL_ERR(mvm, "Invalid sta id (%d) in FW TLC notification\n",
notif->sta_id);
return;
}
lq_sta = &mvmsta->lq_sta.rs_fw;
if (le16_to_cpu(notif->flags) & IWL_TLC_NOTIF_INIT_RATE_MSK) {
lq_sta->last_rate_n_flags =
le32_to_cpu(notif->values[IWL_TLC_NOTIF_INIT_RATE_POS]);
IWL_DEBUG_RATE(mvm, "new rate_n_flags: 0x%X\n",
lq_sta->last_rate_n_flags);
}
}
void rs_fw_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
enum nl80211_band band)
{
struct ieee80211_hw *hw = mvm->hw;
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
u32 cmd_id = iwl_cmd_id(TLC_MNG_CONFIG_CMD, DATA_PATH_GROUP, 0);
struct ieee80211_supported_band *sband;
struct iwl_tlc_config_cmd cfg_cmd = {
.sta_id = mvmsta->sta_id,
.max_supp_ch_width = rs_fw_bw_from_sta_bw(sta),
.flags = cpu_to_le16(rs_fw_set_config_flags(mvm, sta)),
.chains = rs_fw_set_active_chains(iwl_mvm_get_valid_tx_ant(mvm)),
.max_supp_ss = sta->rx_nss,
.max_ampdu_cnt = cpu_to_le32(mvmsta->max_agg_bufsize),
.sgi_ch_width_supp = rs_fw_sgi_cw_support(sta),
};
int ret;
memset(lq_sta, 0, offsetof(typeof(*lq_sta), pers));
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_reset_frame_stats(mvm);
#endif
sband = hw->wiphy->bands[band];
rs_fw_set_supp_rates(sta, sband, &cfg_cmd);
ret = iwl_mvm_send_cmd_pdu(mvm, cmd_id, 0, sizeof(cfg_cmd), &cfg_cmd);
if (ret)
IWL_ERR(mvm, "Failed to send rate scale config (%d)\n", ret);
rs_fw_tlc_mng_notif_req_config(mvm, cfg_cmd.sta_id);
}
int rs_fw_tx_protection(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta,
bool enable)
{
/* TODO: need to introduce a new FW cmd since LQ cmd is not relevant */
IWL_DEBUG_RATE(mvm, "tx protection - not implemented yet.\n");
return 0;
}
void iwl_mvm_rs_add_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta)
{
struct iwl_lq_sta_rs_fw *lq_sta = &mvmsta->lq_sta.rs_fw;
IWL_DEBUG_RATE(mvm, "create station rate scale window\n");
lq_sta->pers.drv = mvm;
lq_sta->pers.sta_id = mvmsta->sta_id;
lq_sta->pers.chains = 0;
memset(lq_sta->pers.chain_signal, 0, sizeof(lq_sta->pers.chain_signal));
lq_sta->pers.last_rssi = S8_MIN;
lq_sta->last_rate_n_flags = 0;
#ifdef CONFIG_MAC80211_DEBUGFS
lq_sta->pers.dbg_fixed_rate = 0;
#endif
}
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