/*
* Sets the fields in the Tx cmd that are rate related
*/
static void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm,
struct iwl_tx_cmd *tx_cmd,
struct ieee80211_tx_info *info,
struct ieee80211_sta *sta,
__le16 fc)
{
u32 rate_flags;
int rate_idx;
u8 rate_plcp;
/* Set retry limit on RTS packets */
tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
/* Set retry limit on DATA packets and Probe Responses*/
if (ieee80211_is_probe_resp(fc)) {
tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
tx_cmd->rts_retry_limit =
min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
} else if (ieee80211_is_back_req(fc)) {
tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
} else {
tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
}
/*
* for data packets, rate info comes from the table inside the fw. This
* table is controlled by LINK_QUALITY commands
*/
if (ieee80211_is_data(fc) && sta) {
tx_cmd->initial_rate_index = 0;
tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
return;
} else if (ieee80211_is_back_req(fc)) {
tx_cmd->tx_flags |=
cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
}
/* HT rate doesn't make sense for a non data frame */
WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
"Got an HT rate for a non data frame 0x%x\n",
info->control.rates[0].flags);
rate_idx = info->control.rates[0].idx;
/* if the rate isn't a well known legacy rate, take the lowest one */
if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
rate_idx = rate_lowest_index(
&mvm->nvm_data->bands[info->band], sta);
/* For 5 GHZ band, remap mac80211 rate indices into driver indices */
if (info->band == IEEE80211_BAND_5GHZ)
rate_idx += IWL_FIRST_OFDM_RATE;
/* For 2.4 GHZ band, check that there is no need to remap */
BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
/* Get PLCP rate for tx_cmd->rate_n_flags */
rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
mvm->mgmt_last_antenna_idx =
iwl_mvm_next_antenna(mvm, iwl_fw_valid_tx_ant(mvm->fw),
mvm->mgmt_last_antenna_idx);
rate_flags = BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
/* Set CCK flag as needed */
if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
rate_flags |= RATE_MCS_CCK_MSK;
/* Set the rate in the TX cmd */
tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
}
int iwl_run_init_mvm_ucode(struct iwl_mvm *mvm, bool read_nvm)
{
struct iwl_notification_wait calib_wait;
static const u8 init_complete[] = {
INIT_COMPLETE_NOTIF,
CALIB_RES_NOTIF_PHY_DB
};
int ret;
lockdep_assert_held(&mvm->mutex);
if (mvm->init_ucode_run)
return 0;
iwl_init_notification_wait(&mvm->notif_wait,
&calib_wait,
init_complete,
ARRAY_SIZE(init_complete),
iwl_wait_phy_db_entry,
mvm->phy_db);
/* Will also start the device */
ret = iwl_mvm_load_ucode_wait_alive(mvm, IWL_UCODE_INIT);
if (ret) {
IWL_ERR(mvm, "Failed to start INIT ucode: %d\n", ret);
goto error;
}
ret = iwl_send_bt_prio_tbl(mvm);
if (ret)
goto error;
if (read_nvm) {
/* Read nvm */
ret = iwl_nvm_init(mvm);
if (ret) {
IWL_ERR(mvm, "Failed to read NVM: %d\n", ret);
goto error;
}
}
ret = iwl_nvm_check_version(mvm->nvm_data, mvm->trans);
WARN_ON(ret);
/*
* abort after reading the nvm in case RF Kill is on, we will complete
* the init seq later when RF kill will switch to off
*/
if (iwl_mvm_is_radio_killed(mvm)) {
IWL_DEBUG_RF_KILL(mvm,
"jump over all phy activities due to RF kill\n");
iwl_remove_notification(&mvm->notif_wait, &calib_wait);
return 1;
}
/* Send TX valid antennas before triggering calibrations */
ret = iwl_send_tx_ant_cfg(mvm, iwl_fw_valid_tx_ant(mvm->fw));
if (ret)
goto error;
/*
* Send phy configurations command to init uCode
* to start the 16.0 uCode init image internal calibrations.
*/
ret = iwl_send_phy_cfg_cmd(mvm);
if (ret) {
IWL_ERR(mvm, "Failed to run INIT calibrations: %d\n",
ret);
goto error;
}
/*
* Some things may run in the background now, but we
* just wait for the calibration complete notification.
*/
ret = iwl_wait_notification(&mvm->notif_wait, &calib_wait,
MVM_UCODE_CALIB_TIMEOUT);
if (!ret)
mvm->init_ucode_run = true;
goto out;
error:
iwl_remove_notification(&mvm->notif_wait, &calib_wait);
out:
if (!iwlmvm_mod_params.init_dbg) {
iwl_trans_stop_device(mvm->trans);
} else if (!mvm->nvm_data) {
/* we want to debug INIT and we have no NVM - fake */
mvm->nvm_data = kzalloc(sizeof(struct iwl_nvm_data) +
sizeof(struct ieee80211_channel) +
sizeof(struct ieee80211_rate),
GFP_KERNEL);
if (!mvm->nvm_data)
return -ENOMEM;
mvm->nvm_data->valid_rx_ant = 1;
mvm->nvm_data->valid_tx_ant = 1;
mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels;
mvm->nvm_data->bands[0].n_channels = 1;
mvm->nvm_data->bands[0].n_bitrates = 1;
mvm->nvm_data->bands[0].bitrates =
(void *)mvm->nvm_data->channels + 1;
mvm->nvm_data->bands[0].bitrates->hw_value = 10;
}
return ret;
}
int iwl_mvm_up(struct iwl_mvm *mvm)
{
int ret, i;
struct ieee80211_channel *chan;
struct cfg80211_chan_def chandef;
lockdep_assert_held(&mvm->mutex);
ret = iwl_trans_start_hw(mvm->trans);
if (ret)
return ret;
/* If we were in RFKILL during module loading, load init ucode now */
if (!mvm->init_ucode_run) {
ret = iwl_run_init_mvm_ucode(mvm, false);
if (ret && !iwlmvm_mod_params.init_dbg) {
IWL_ERR(mvm, "Failed to run INIT ucode: %d\n", ret);
/* this can't happen */
if (WARN_ON(ret > 0))
ret = -ERFKILL;
goto error;
}
/* should stop & start HW since that INIT image just loaded */
iwl_trans_stop_hw(mvm->trans, false);
ret = iwl_trans_start_hw(mvm->trans);
if (ret)
return ret;
}
if (iwlmvm_mod_params.init_dbg)
return 0;
ret = iwl_mvm_load_ucode_wait_alive(mvm, IWL_UCODE_REGULAR);
if (ret) {
IWL_ERR(mvm, "Failed to start RT ucode: %d\n", ret);
goto error;
}
ret = iwl_send_tx_ant_cfg(mvm, iwl_fw_valid_tx_ant(mvm->fw));
if (ret)
goto error;
ret = iwl_send_bt_prio_tbl(mvm);
if (ret)
goto error;
ret = iwl_send_bt_init_conf(mvm);
if (ret)
goto error;
/* Send phy db control command and then phy db calibration*/
ret = iwl_send_phy_db_data(mvm->phy_db);
if (ret)
goto error;
ret = iwl_send_phy_cfg_cmd(mvm);
if (ret)
goto error;
/* init the fw <-> mac80211 STA mapping */
for (i = 0; i < IWL_MVM_STATION_COUNT; i++)
RCU_INIT_POINTER(mvm->fw_id_to_mac_id[i], NULL);
/* Add auxiliary station for scanning */
ret = iwl_mvm_add_aux_sta(mvm);
if (ret)
goto error;
/* Add all the PHY contexts */
chan = &mvm->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels[0];
cfg80211_chandef_create(&chandef, chan, NL80211_CHAN_NO_HT);
for (i = 0; i < NUM_PHY_CTX; i++) {
/*
* The channel used here isn't relevant as it's
* going to be overwritten in the other flows.
* For now use the first channel we have.
*/
ret = iwl_mvm_phy_ctxt_add(mvm, &mvm->phy_ctxts[i],
&chandef, 1, 1);
if (ret)
goto error;
}
IWL_DEBUG_INFO(mvm, "RT uCode started.\n");
return 0;
error:
iwl_trans_stop_device(mvm->trans);
return ret;
}
void iwl_mvm_rs_rate_init(struct iwl_mvm *mvm, struct ieee80211_sta *sta,
enum ieee80211_band band)
{
int i, j;
struct ieee80211_hw *hw = mvm->hw;
struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
struct iwl_mvm_sta *sta_priv;
struct iwl_lq_sta *lq_sta;
struct ieee80211_supported_band *sband;
unsigned long supp; /* must be unsigned long for for_each_set_bit */
sta_priv = (struct iwl_mvm_sta *)sta->drv_priv;
lq_sta = &sta_priv->lq_sta;
sband = hw->wiphy->bands[band];
lq_sta->lq.sta_id = sta_priv->sta_id;
for (j = 0; j < LQ_SIZE; j++)
for (i = 0; i < IWL_RATE_COUNT; i++)
rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
lq_sta->flush_timer = 0;
lq_sta->supp_rates = sta->supp_rates[sband->band];
for (j = 0; j < LQ_SIZE; j++)
for (i = 0; i < IWL_RATE_COUNT; i++)
rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
IWL_DEBUG_RATE(mvm,
"LQ: *** rate scale station global init for station %d ***\n",
sta_priv->sta_id);
/* TODO: what is a good starting rate for STA? About middle? Maybe not
* the lowest or the highest rate.. Could consider using RSSI from
* previous packets? Need to have IEEE 802.1X auth succeed immediately
* after assoc.. */
lq_sta->max_rate_idx = -1;
lq_sta->missed_rate_counter = IWL_MISSED_RATE_MAX;
lq_sta->is_green = rs_use_green(sta);
lq_sta->band = sband->band;
/*
* active legacy rates as per supported rates bitmap
*/
supp = sta->supp_rates[sband->band];
lq_sta->active_legacy_rate = 0;
for_each_set_bit(i, &supp, BITS_PER_LONG)
lq_sta->active_legacy_rate |= BIT(sband->bitrates[i].hw_value);
/*
* active_siso_rate mask includes 9 MBits (bit 5), and CCK (bits 0-3),
* supp_rates[] does not; shift to convert format, force 9 MBits off.
*/
lq_sta->active_siso_rate = ht_cap->mcs.rx_mask[0] << 1;
lq_sta->active_siso_rate |= ht_cap->mcs.rx_mask[0] & 0x1;
lq_sta->active_siso_rate &= ~((u16)0x2);
lq_sta->active_siso_rate <<= IWL_FIRST_OFDM_RATE;
/* Same here */
lq_sta->active_mimo2_rate = ht_cap->mcs.rx_mask[1] << 1;
lq_sta->active_mimo2_rate |= ht_cap->mcs.rx_mask[1] & 0x1;
lq_sta->active_mimo2_rate &= ~((u16)0x2);
lq_sta->active_mimo2_rate <<= IWL_FIRST_OFDM_RATE;
lq_sta->active_mimo3_rate = ht_cap->mcs.rx_mask[2] << 1;
lq_sta->active_mimo3_rate |= ht_cap->mcs.rx_mask[2] & 0x1;
lq_sta->active_mimo3_rate &= ~((u16)0x2);
lq_sta->active_mimo3_rate <<= IWL_FIRST_OFDM_RATE;
IWL_DEBUG_RATE(mvm,
"SISO-RATE=%X MIMO2-RATE=%X MIMO3-RATE=%X\n",
lq_sta->active_siso_rate,
lq_sta->active_mimo2_rate,
lq_sta->active_mimo3_rate);
/* These values will be overridden later */
lq_sta->lq.single_stream_ant_msk =
first_antenna(iwl_fw_valid_tx_ant(mvm->fw));
lq_sta->lq.dual_stream_ant_msk =
iwl_fw_valid_tx_ant(mvm->fw) &
~first_antenna(iwl_fw_valid_tx_ant(mvm->fw));
if (!lq_sta->lq.dual_stream_ant_msk) {
lq_sta->lq.dual_stream_ant_msk = ANT_AB;
} else if (num_of_ant(iwl_fw_valid_tx_ant(mvm->fw)) == 2) {
lq_sta->lq.dual_stream_ant_msk =
iwl_fw_valid_tx_ant(mvm->fw);
}
/* as default allow aggregation for all tids */
lq_sta->tx_agg_tid_en = IWL_AGG_ALL_TID;
lq_sta->drv = mvm;
/* Set last_txrate_idx to lowest rate */
lq_sta->last_txrate_idx = rate_lowest_index(sband, sta);
if (sband->band == IEEE80211_BAND_5GHZ)
lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
lq_sta->is_agg = 0;
#ifdef CONFIG_MAC80211_DEBUGFS
lq_sta->dbg_fixed_rate = 0;
#endif
rs_initialize_lq(mvm, sta, lq_sta, band);
}