Exemple #1
0
/*
 * 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);
}
Exemple #2
0
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;
}
Exemple #3
0
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);
}