352 lines
11 KiB
C
352 lines
11 KiB
C
/******************************************************************************
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-calib.h"
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#include "iwl-sta.h"
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#include "iwl-io.h"
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#include "iwl-helpers.h"
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#include "iwl-agn-hw.h"
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#include "iwl-agn.h"
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void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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struct iwl_missed_beacon_notif *missed_beacon;
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missed_beacon = &pkt->u.missed_beacon;
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if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
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priv->missed_beacon_threshold) {
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IWL_DEBUG_CALIB(priv,
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"missed bcn cnsq %d totl %d rcd %d expctd %d\n",
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le32_to_cpu(missed_beacon->consecutive_missed_beacons),
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le32_to_cpu(missed_beacon->total_missed_becons),
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le32_to_cpu(missed_beacon->num_recvd_beacons),
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le32_to_cpu(missed_beacon->num_expected_beacons));
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if (!test_bit(STATUS_SCANNING, &priv->status))
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iwl_init_sensitivity(priv);
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}
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}
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/* Calculate noise level, based on measurements during network silence just
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* before arriving beacon. This measurement can be done only if we know
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* exactly when to expect beacons, therefore only when we're associated. */
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static void iwl_rx_calc_noise(struct iwl_priv *priv)
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{
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struct statistics_rx_non_phy *rx_info;
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int num_active_rx = 0;
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int total_silence = 0;
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int bcn_silence_a, bcn_silence_b, bcn_silence_c;
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int last_rx_noise;
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if (priv->cfg->bt_statistics)
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rx_info = &(priv->_agn.statistics_bt.rx.general.common);
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else
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rx_info = &(priv->_agn.statistics.rx.general);
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bcn_silence_a =
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le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
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bcn_silence_b =
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le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
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bcn_silence_c =
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le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
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if (bcn_silence_a) {
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total_silence += bcn_silence_a;
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num_active_rx++;
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}
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if (bcn_silence_b) {
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total_silence += bcn_silence_b;
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num_active_rx++;
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}
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if (bcn_silence_c) {
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total_silence += bcn_silence_c;
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num_active_rx++;
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}
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/* Average among active antennas */
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if (num_active_rx)
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last_rx_noise = (total_silence / num_active_rx) - 107;
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else
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last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
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IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
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bcn_silence_a, bcn_silence_b, bcn_silence_c,
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last_rx_noise);
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}
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#ifdef CONFIG_IWLWIFI_DEBUGFS
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/*
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* based on the assumption of all statistics counter are in DWORD
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* FIXME: This function is for debugging, do not deal with
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* the case of counters roll-over.
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*/
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static void iwl_accumulative_statistics(struct iwl_priv *priv,
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__le32 *stats)
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{
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int i, size;
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__le32 *prev_stats;
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u32 *accum_stats;
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u32 *delta, *max_delta;
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struct statistics_general_common *general, *accum_general;
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struct statistics_tx *tx, *accum_tx;
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if (priv->cfg->bt_statistics) {
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prev_stats = (__le32 *)&priv->_agn.statistics_bt;
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accum_stats = (u32 *)&priv->_agn.accum_statistics_bt;
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size = sizeof(struct iwl_bt_notif_statistics);
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general = &priv->_agn.statistics_bt.general.common;
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accum_general = &priv->_agn.accum_statistics_bt.general.common;
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tx = &priv->_agn.statistics_bt.tx;
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accum_tx = &priv->_agn.accum_statistics_bt.tx;
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delta = (u32 *)&priv->_agn.delta_statistics_bt;
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max_delta = (u32 *)&priv->_agn.max_delta_bt;
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} else {
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prev_stats = (__le32 *)&priv->_agn.statistics;
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accum_stats = (u32 *)&priv->_agn.accum_statistics;
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size = sizeof(struct iwl_notif_statistics);
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general = &priv->_agn.statistics.general.common;
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accum_general = &priv->_agn.accum_statistics.general.common;
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tx = &priv->_agn.statistics.tx;
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accum_tx = &priv->_agn.accum_statistics.tx;
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delta = (u32 *)&priv->_agn.delta_statistics;
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max_delta = (u32 *)&priv->_agn.max_delta;
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}
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for (i = sizeof(__le32); i < size;
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i += sizeof(__le32), stats++, prev_stats++, delta++,
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max_delta++, accum_stats++) {
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if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
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*delta = (le32_to_cpu(*stats) -
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le32_to_cpu(*prev_stats));
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*accum_stats += *delta;
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if (*delta > *max_delta)
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*max_delta = *delta;
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}
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}
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/* reset accumulative statistics for "no-counter" type statistics */
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accum_general->temperature = general->temperature;
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accum_general->temperature_m = general->temperature_m;
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accum_general->ttl_timestamp = general->ttl_timestamp;
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accum_tx->tx_power.ant_a = tx->tx_power.ant_a;
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accum_tx->tx_power.ant_b = tx->tx_power.ant_b;
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accum_tx->tx_power.ant_c = tx->tx_power.ant_c;
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}
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#endif
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#define REG_RECALIB_PERIOD (60)
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/**
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* iwl_good_plcp_health - checks for plcp error.
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*
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* When the plcp error is exceeding the thresholds, reset the radio
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* to improve the throughput.
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*/
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bool iwl_good_plcp_health(struct iwl_priv *priv,
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struct iwl_rx_packet *pkt)
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{
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bool rc = true;
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int combined_plcp_delta;
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unsigned int plcp_msec;
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unsigned long plcp_received_jiffies;
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if (priv->cfg->plcp_delta_threshold ==
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IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
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IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
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return rc;
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}
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/*
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* check for plcp_err and trigger radio reset if it exceeds
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* the plcp error threshold plcp_delta.
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*/
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plcp_received_jiffies = jiffies;
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plcp_msec = jiffies_to_msecs((long) plcp_received_jiffies -
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(long) priv->plcp_jiffies);
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priv->plcp_jiffies = plcp_received_jiffies;
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/*
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* check to make sure plcp_msec is not 0 to prevent division
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* by zero.
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*/
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if (plcp_msec) {
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struct statistics_rx_phy *ofdm;
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struct statistics_rx_ht_phy *ofdm_ht;
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if (priv->cfg->bt_statistics) {
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ofdm = &pkt->u.stats_bt.rx.ofdm;
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ofdm_ht = &pkt->u.stats_bt.rx.ofdm_ht;
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combined_plcp_delta =
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(le32_to_cpu(ofdm->plcp_err) -
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le32_to_cpu(priv->_agn.statistics_bt.
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rx.ofdm.plcp_err)) +
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(le32_to_cpu(ofdm_ht->plcp_err) -
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le32_to_cpu(priv->_agn.statistics_bt.
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rx.ofdm_ht.plcp_err));
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} else {
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ofdm = &pkt->u.stats.rx.ofdm;
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ofdm_ht = &pkt->u.stats.rx.ofdm_ht;
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combined_plcp_delta =
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(le32_to_cpu(ofdm->plcp_err) -
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le32_to_cpu(priv->_agn.statistics.
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rx.ofdm.plcp_err)) +
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(le32_to_cpu(ofdm_ht->plcp_err) -
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le32_to_cpu(priv->_agn.statistics.
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rx.ofdm_ht.plcp_err));
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}
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if ((combined_plcp_delta > 0) &&
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((combined_plcp_delta * 100) / plcp_msec) >
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priv->cfg->plcp_delta_threshold) {
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/*
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* if plcp_err exceed the threshold,
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* the following data is printed in csv format:
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* Text: plcp_err exceeded %d,
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* Received ofdm.plcp_err,
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* Current ofdm.plcp_err,
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* Received ofdm_ht.plcp_err,
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* Current ofdm_ht.plcp_err,
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* combined_plcp_delta,
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* plcp_msec
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*/
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IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
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"%u, %u, %u, %u, %d, %u mSecs\n",
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priv->cfg->plcp_delta_threshold,
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le32_to_cpu(ofdm->plcp_err),
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le32_to_cpu(ofdm->plcp_err),
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le32_to_cpu(ofdm_ht->plcp_err),
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le32_to_cpu(ofdm_ht->plcp_err),
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combined_plcp_delta, plcp_msec);
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rc = false;
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}
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}
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return rc;
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}
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void iwl_rx_statistics(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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int change;
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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if (priv->cfg->bt_statistics) {
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IWL_DEBUG_RX(priv,
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"Statistics notification received (%d vs %d).\n",
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(int)sizeof(struct iwl_bt_notif_statistics),
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le32_to_cpu(pkt->len_n_flags) &
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FH_RSCSR_FRAME_SIZE_MSK);
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change = ((priv->_agn.statistics_bt.general.common.temperature !=
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pkt->u.stats_bt.general.common.temperature) ||
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((priv->_agn.statistics_bt.flag &
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STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
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(pkt->u.stats_bt.flag &
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STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
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#ifdef CONFIG_IWLWIFI_DEBUGFS
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iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats_bt);
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#endif
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} else {
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IWL_DEBUG_RX(priv,
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"Statistics notification received (%d vs %d).\n",
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(int)sizeof(struct iwl_notif_statistics),
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le32_to_cpu(pkt->len_n_flags) &
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FH_RSCSR_FRAME_SIZE_MSK);
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change = ((priv->_agn.statistics.general.common.temperature !=
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pkt->u.stats.general.common.temperature) ||
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((priv->_agn.statistics.flag &
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STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
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(pkt->u.stats.flag &
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STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
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#ifdef CONFIG_IWLWIFI_DEBUGFS
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iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
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#endif
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}
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iwl_recover_from_statistics(priv, pkt);
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if (priv->cfg->bt_statistics)
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memcpy(&priv->_agn.statistics_bt, &pkt->u.stats_bt,
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sizeof(priv->_agn.statistics_bt));
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else
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memcpy(&priv->_agn.statistics, &pkt->u.stats,
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sizeof(priv->_agn.statistics));
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set_bit(STATUS_STATISTICS, &priv->status);
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/* Reschedule the statistics timer to occur in
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* REG_RECALIB_PERIOD seconds to ensure we get a
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* thermal update even if the uCode doesn't give
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* us one */
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mod_timer(&priv->statistics_periodic, jiffies +
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msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
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if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
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(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
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iwl_rx_calc_noise(priv);
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queue_work(priv->workqueue, &priv->run_time_calib_work);
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}
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if (priv->cfg->ops->lib->temp_ops.temperature && change)
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priv->cfg->ops->lib->temp_ops.temperature(priv);
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}
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void iwl_reply_statistics(struct iwl_priv *priv,
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struct iwl_rx_mem_buffer *rxb)
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{
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struct iwl_rx_packet *pkt = rxb_addr(rxb);
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if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
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#ifdef CONFIG_IWLWIFI_DEBUGFS
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memset(&priv->_agn.accum_statistics, 0,
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sizeof(struct iwl_notif_statistics));
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memset(&priv->_agn.delta_statistics, 0,
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sizeof(struct iwl_notif_statistics));
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memset(&priv->_agn.max_delta, 0,
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sizeof(struct iwl_notif_statistics));
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memset(&priv->_agn.accum_statistics_bt, 0,
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sizeof(struct iwl_bt_notif_statistics));
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memset(&priv->_agn.delta_statistics_bt, 0,
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sizeof(struct iwl_bt_notif_statistics));
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memset(&priv->_agn.max_delta_bt, 0,
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sizeof(struct iwl_bt_notif_statistics));
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#endif
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IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
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}
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iwl_rx_statistics(priv, rxb);
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}
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