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/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 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-4965-calib.h"
#include "iwl-sta.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-4965-hw.h"
#include "iwl-4965.h"
void il4965_rx_missed_beacon_notif(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
struct il_rx_packet *pkt = rxb_addr(rxb);
struct il_missed_beacon_notif *missed_beacon;
missed_beacon = &pkt->u.missed_beacon;
if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
il->missed_beacon_threshold) {
IL_DEBUG_CALIB(il,
"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, &il->status))
il4965_init_sensitivity(il);
}
}
/* 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 il4965_rx_calc_noise(struct il_priv *il)
{
struct statistics_rx_non_phy *rx_info;
int num_active_rx = 0;
int total_silence = 0;
int bcn_silence_a, bcn_silence_b, bcn_silence_c;
int last_rx_noise;
rx_info = &(il->_4965.statistics.rx.general);
bcn_silence_a =
le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
bcn_silence_b =
le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
bcn_silence_c =
le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
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 = IL_NOISE_MEAS_NOT_AVAILABLE;
IL_DEBUG_CALIB(il, "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_LEGACY_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 il4965_accumulative_statistics(struct il_priv *il,
__le32 *stats)
{
int i, size;
__le32 *prev_stats;
u32 *accum_stats;
u32 *delta, *max_delta;
struct statistics_general_common *general, *accum_general;
struct statistics_tx *tx, *accum_tx;
prev_stats = (__le32 *)&il->_4965.statistics;
accum_stats = (u32 *)&il->_4965.accum_statistics;
size = sizeof(struct il_notif_statistics);
general = &il->_4965.statistics.general.common;
accum_general = &il->_4965.accum_statistics.general.common;
tx = &il->_4965.statistics.tx;
accum_tx = &il->_4965.accum_statistics.tx;
delta = (u32 *)&il->_4965.delta_statistics;
max_delta = (u32 *)&il->_4965.max_delta;
for (i = sizeof(__le32); i < size;
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 */
accum_general->temperature = general->temperature;
accum_general->ttl_timestamp = general->ttl_timestamp;
}
#endif
#define REG_RECALIB_PERIOD (60)
void il4965_rx_statistics(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
int change;
struct il_rx_packet *pkt = rxb_addr(rxb);
IL_DEBUG_RX(il,
"Statistics notification received (%d vs %d).\n",
(int)sizeof(struct il_notif_statistics),
le32_to_cpu(pkt->len_n_flags) &
FH_RSCSR_FRAME_SIZE_MSK);
change = ((il->_4965.statistics.general.common.temperature !=
pkt->u.stats.general.common.temperature) ||
((il->_4965.statistics.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
(pkt->u.stats.flag &
STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
#ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
il4965_accumulative_statistics(il, (__le32 *)&pkt->u.stats);
#endif
/* TODO: reading some of statistics is unneeded */
memcpy(&il->_4965.statistics, &pkt->u.stats,
sizeof(il->_4965.statistics));
set_bit(STATUS_STATISTICS, &il->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(&il->statistics_periodic, jiffies +
msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
if (unlikely(!test_bit(STATUS_SCANNING, &il->status)) &&
(pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
il4965_rx_calc_noise(il);
queue_work(il->workqueue, &il->run_time_calib_work);
}
if (il->cfg->ops->lib->temp_ops.temperature && change)
il->cfg->ops->lib->temp_ops.temperature(il);
}
void il4965_reply_statistics(struct il_priv *il,
struct il_rx_mem_buffer *rxb)
{
struct il_rx_packet *pkt = rxb_addr(rxb);
if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
#ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
memset(&il->_4965.accum_statistics, 0,
sizeof(struct il_notif_statistics));
memset(&il->_4965.delta_statistics, 0,
sizeof(struct il_notif_statistics));
memset(&il->_4965.max_delta, 0,
sizeof(struct il_notif_statistics));
#endif
IL_DEBUG_RX(il, "Statistics have been cleared\n");
}
il4965_rx_statistics(il, rxb);
}
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