forked from Minki/linux
680788aca3
For some devices, especially the upcoming new devices, the plcp error rate is different. Before the correct error rate can be determine, also for the debugging purpose; add the mechanism to disable plcp error checking which cause radio reset happen. Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
285 lines
8.8 KiB
C
285 lines
8.8 KiB
C
/******************************************************************************
|
|
*
|
|
* GPL LICENSE SUMMARY
|
|
*
|
|
* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
|
|
* USA
|
|
*
|
|
* The full GNU General Public License is included in this distribution
|
|
* in the file called LICENSE.GPL.
|
|
*
|
|
* Contact Information:
|
|
* Intel Linux Wireless <ilw@linux.intel.com>
|
|
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
|
|
#include "iwl-dev.h"
|
|
#include "iwl-core.h"
|
|
#include "iwl-calib.h"
|
|
#include "iwl-sta.h"
|
|
#include "iwl-io.h"
|
|
#include "iwl-helpers.h"
|
|
#include "iwl-agn-hw.h"
|
|
#include "iwl-agn.h"
|
|
|
|
void iwl_rx_missed_beacon_notif(struct iwl_priv *priv,
|
|
struct iwl_rx_mem_buffer *rxb)
|
|
|
|
{
|
|
struct iwl_rx_packet *pkt = rxb_addr(rxb);
|
|
struct iwl_missed_beacon_notif *missed_beacon;
|
|
|
|
missed_beacon = &pkt->u.missed_beacon;
|
|
if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
|
|
priv->missed_beacon_threshold) {
|
|
IWL_DEBUG_CALIB(priv,
|
|
"missed bcn cnsq %d totl %d rcd %d expctd %d\n",
|
|
le32_to_cpu(missed_beacon->consecutive_missed_beacons),
|
|
le32_to_cpu(missed_beacon->total_missed_becons),
|
|
le32_to_cpu(missed_beacon->num_recvd_beacons),
|
|
le32_to_cpu(missed_beacon->num_expected_beacons));
|
|
if (!test_bit(STATUS_SCANNING, &priv->status))
|
|
iwl_init_sensitivity(priv);
|
|
}
|
|
}
|
|
|
|
/* Calculate noise level, based on measurements during network silence just
|
|
* before arriving beacon. This measurement can be done only if we know
|
|
* exactly when to expect beacons, therefore only when we're associated. */
|
|
static void iwl_rx_calc_noise(struct iwl_priv *priv)
|
|
{
|
|
struct statistics_rx_non_phy *rx_info
|
|
= &(priv->_agn.statistics.rx.general);
|
|
int num_active_rx = 0;
|
|
int total_silence = 0;
|
|
int bcn_silence_a =
|
|
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
|
|
int bcn_silence_b =
|
|
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
|
|
int bcn_silence_c =
|
|
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
|
|
int last_rx_noise;
|
|
|
|
if (bcn_silence_a) {
|
|
total_silence += bcn_silence_a;
|
|
num_active_rx++;
|
|
}
|
|
if (bcn_silence_b) {
|
|
total_silence += bcn_silence_b;
|
|
num_active_rx++;
|
|
}
|
|
if (bcn_silence_c) {
|
|
total_silence += bcn_silence_c;
|
|
num_active_rx++;
|
|
}
|
|
|
|
/* Average among active antennas */
|
|
if (num_active_rx)
|
|
last_rx_noise = (total_silence / num_active_rx) - 107;
|
|
else
|
|
last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
|
|
|
|
IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
|
|
bcn_silence_a, bcn_silence_b, bcn_silence_c,
|
|
last_rx_noise);
|
|
}
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUGFS
|
|
/*
|
|
* based on the assumption of all statistics counter are in DWORD
|
|
* FIXME: This function is for debugging, do not deal with
|
|
* the case of counters roll-over.
|
|
*/
|
|
static void iwl_accumulative_statistics(struct iwl_priv *priv,
|
|
__le32 *stats)
|
|
{
|
|
int i;
|
|
__le32 *prev_stats;
|
|
u32 *accum_stats;
|
|
u32 *delta, *max_delta;
|
|
|
|
prev_stats = (__le32 *)&priv->_agn.statistics;
|
|
accum_stats = (u32 *)&priv->_agn.accum_statistics;
|
|
delta = (u32 *)&priv->_agn.delta_statistics;
|
|
max_delta = (u32 *)&priv->_agn.max_delta;
|
|
|
|
for (i = sizeof(__le32); i < sizeof(struct iwl_notif_statistics);
|
|
i += sizeof(__le32), stats++, prev_stats++, delta++,
|
|
max_delta++, accum_stats++) {
|
|
if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
|
|
*delta = (le32_to_cpu(*stats) -
|
|
le32_to_cpu(*prev_stats));
|
|
*accum_stats += *delta;
|
|
if (*delta > *max_delta)
|
|
*max_delta = *delta;
|
|
}
|
|
}
|
|
|
|
/* reset accumulative statistics for "no-counter" type statistics */
|
|
priv->_agn.accum_statistics.general.temperature =
|
|
priv->_agn.statistics.general.temperature;
|
|
priv->_agn.accum_statistics.general.temperature_m =
|
|
priv->_agn.statistics.general.temperature_m;
|
|
priv->_agn.accum_statistics.general.ttl_timestamp =
|
|
priv->_agn.statistics.general.ttl_timestamp;
|
|
priv->_agn.accum_statistics.tx.tx_power.ant_a =
|
|
priv->_agn.statistics.tx.tx_power.ant_a;
|
|
priv->_agn.accum_statistics.tx.tx_power.ant_b =
|
|
priv->_agn.statistics.tx.tx_power.ant_b;
|
|
priv->_agn.accum_statistics.tx.tx_power.ant_c =
|
|
priv->_agn.statistics.tx.tx_power.ant_c;
|
|
}
|
|
#endif
|
|
|
|
#define REG_RECALIB_PERIOD (60)
|
|
|
|
/**
|
|
* iwl_good_plcp_health - checks for plcp error.
|
|
*
|
|
* When the plcp error is exceeding the thresholds, reset the radio
|
|
* to improve the throughput.
|
|
*/
|
|
bool iwl_good_plcp_health(struct iwl_priv *priv,
|
|
struct iwl_rx_packet *pkt)
|
|
{
|
|
bool rc = true;
|
|
int combined_plcp_delta;
|
|
unsigned int plcp_msec;
|
|
unsigned long plcp_received_jiffies;
|
|
|
|
if (priv->cfg->plcp_delta_threshold ==
|
|
IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
|
|
IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* check for plcp_err and trigger radio reset if it exceeds
|
|
* the plcp error threshold plcp_delta.
|
|
*/
|
|
plcp_received_jiffies = jiffies;
|
|
plcp_msec = jiffies_to_msecs((long) plcp_received_jiffies -
|
|
(long) priv->plcp_jiffies);
|
|
priv->plcp_jiffies = plcp_received_jiffies;
|
|
/*
|
|
* check to make sure plcp_msec is not 0 to prevent division
|
|
* by zero.
|
|
*/
|
|
if (plcp_msec) {
|
|
combined_plcp_delta =
|
|
(le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err) -
|
|
le32_to_cpu(priv->_agn.statistics.rx.ofdm.plcp_err)) +
|
|
(le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err) -
|
|
le32_to_cpu(priv->_agn.statistics.rx.ofdm_ht.plcp_err));
|
|
|
|
if ((combined_plcp_delta > 0) &&
|
|
((combined_plcp_delta * 100) / plcp_msec) >
|
|
priv->cfg->plcp_delta_threshold) {
|
|
/*
|
|
* if plcp_err exceed the threshold,
|
|
* the following data is printed in csv format:
|
|
* Text: plcp_err exceeded %d,
|
|
* Received ofdm.plcp_err,
|
|
* Current ofdm.plcp_err,
|
|
* Received ofdm_ht.plcp_err,
|
|
* Current ofdm_ht.plcp_err,
|
|
* combined_plcp_delta,
|
|
* plcp_msec
|
|
*/
|
|
IWL_DEBUG_RADIO(priv, "plcp_err exceeded %u, "
|
|
"%u, %u, %u, %u, %d, %u mSecs\n",
|
|
priv->cfg->plcp_delta_threshold,
|
|
le32_to_cpu(pkt->u.stats.rx.ofdm.plcp_err),
|
|
le32_to_cpu(
|
|
priv->_agn.statistics.rx.ofdm.plcp_err),
|
|
le32_to_cpu(pkt->u.stats.rx.ofdm_ht.plcp_err),
|
|
le32_to_cpu(
|
|
priv->_agn.statistics.rx.ofdm_ht.plcp_err),
|
|
combined_plcp_delta, plcp_msec);
|
|
rc = false;
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
void iwl_rx_statistics(struct iwl_priv *priv,
|
|
struct iwl_rx_mem_buffer *rxb)
|
|
{
|
|
int change;
|
|
struct iwl_rx_packet *pkt = rxb_addr(rxb);
|
|
|
|
|
|
IWL_DEBUG_RX(priv, "Statistics notification received (%d vs %d).\n",
|
|
(int)sizeof(priv->_agn.statistics),
|
|
le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK);
|
|
|
|
change = ((priv->_agn.statistics.general.temperature !=
|
|
pkt->u.stats.general.temperature) ||
|
|
((priv->_agn.statistics.flag &
|
|
STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
|
|
(pkt->u.stats.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
|
|
|
|
#ifdef CONFIG_IWLWIFI_DEBUGFS
|
|
iwl_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
|
|
#endif
|
|
iwl_recover_from_statistics(priv, pkt);
|
|
|
|
memcpy(&priv->_agn.statistics, &pkt->u.stats,
|
|
sizeof(priv->_agn.statistics));
|
|
|
|
set_bit(STATUS_STATISTICS, &priv->status);
|
|
|
|
/* Reschedule the statistics timer to occur in
|
|
* REG_RECALIB_PERIOD seconds to ensure we get a
|
|
* thermal update even if the uCode doesn't give
|
|
* us one */
|
|
mod_timer(&priv->statistics_periodic, jiffies +
|
|
msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
|
|
|
|
if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
|
|
(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
|
|
iwl_rx_calc_noise(priv);
|
|
queue_work(priv->workqueue, &priv->run_time_calib_work);
|
|
}
|
|
if (priv->cfg->ops->lib->temp_ops.temperature && change)
|
|
priv->cfg->ops->lib->temp_ops.temperature(priv);
|
|
}
|
|
|
|
void iwl_reply_statistics(struct iwl_priv *priv,
|
|
struct iwl_rx_mem_buffer *rxb)
|
|
{
|
|
struct iwl_rx_packet *pkt = rxb_addr(rxb);
|
|
|
|
if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
|
|
#ifdef CONFIG_IWLWIFI_DEBUGFS
|
|
memset(&priv->_agn.accum_statistics, 0,
|
|
sizeof(struct iwl_notif_statistics));
|
|
memset(&priv->_agn.delta_statistics, 0,
|
|
sizeof(struct iwl_notif_statistics));
|
|
memset(&priv->_agn.max_delta, 0,
|
|
sizeof(struct iwl_notif_statistics));
|
|
#endif
|
|
IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
|
|
}
|
|
iwl_rx_statistics(priv, rxb);
|
|
}
|