path: root/drivers/net/wireless/intel/iwlwifi/dvm/lib.c

// SPDX-License-Identifier: GPL-2.0-only
/******************************************************************************
 *
 * Copyright(c) 2008 - 2014, 2022 Intel Corporation. All rights reserved.
 *****************************************************************************/
#include <linux/etherdevice.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <net/mac80211.h>

#include "iwl-io.h"
#include "iwl-agn-hw.h"
#include "iwl-trans.h"
#include "iwl-modparams.h"

#include "dev.h"
#include "agn.h"

int iwlagn_hw_valid_rtc_data_addr(u32 addr)
{
	return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
		(addr < IWLAGN_RTC_DATA_UPPER_BOUND);
}

int iwlagn_send_tx_power(struct iwl_priv *priv)
{
	struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
	u8 tx_ant_cfg_cmd;

	if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
		      "TX Power requested while scanning!\n"))
		return -EAGAIN;

	/* half dBm need to multiply */
	tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);

	if (tx_power_cmd.global_lmt > priv->nvm_data->max_tx_pwr_half_dbm) {
		/*
		 * For the newer devices which using enhanced/extend tx power
		 * table in EEPROM, the format is in half dBm. driver need to
		 * convert to dBm format before report to mac80211.
		 * By doing so, there is a possibility of 1/2 dBm resolution
		 * lost. driver will perform "round-up" operation before
		 * reporting, but it will cause 1/2 dBm tx power over the
		 * regulatory limit. Perform the checking here, if the
		 * "tx_power_user_lmt" is higher than EEPROM value (in
		 * half-dBm format), lower the tx power based on EEPROM
		 */
		tx_power_cmd.global_lmt =
			priv->nvm_data->max_tx_pwr_half_dbm;
	}
	tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
	tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;

	if (IWL_UCODE_API(priv->fw->ucode_ver) == 1)
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
	else
		tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;

	return iwl_dvm_send_cmd_pdu(priv, tx_ant_cfg_cmd, 0,
			sizeof(tx_power_cmd), &tx_power_cmd);
}

void iwlagn_temperature(struct iwl_priv *priv)
{
	lockdep_assert_held(&priv->statistics.lock);

	/* store temperature from correct statistics (in Celsius) */
	priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
	iwl_tt_handler(priv);
}

int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum nl80211_band band)
{
	int idx = 0;
	int band_offset = 0;

	/* HT rate format: mac80211 wants an MCS number, which is just LSB */
	if (rate_n_flags & RATE_MCS_HT_MSK) {
		idx = (rate_n_flags & 0xff);
		return idx;
	/* Legacy rate format, search for match in table */
	} else {
		if (band == NL80211_BAND_5GHZ)
			band_offset = IWL_FIRST_OFDM_RATE;
		for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
			if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
				return idx - band_offset;
	}

	return -1;
}

int iwlagn_manage_ibss_station(struct iwl_priv *priv,
			       struct ieee80211_vif *vif, bool add)
{
	struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;

	if (add)
		return iwlagn_add_bssid_station(priv, vif_priv->ctx,
						vif->bss_conf.bssid,
						&vif_priv->ibss_bssid_sta_id);
	return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
				  vif->bss_conf.bssid);
}

/*
 * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
 *
 * pre-requirements:
 *  1. acquire mutex before calling
 *  2. make sure r