drivers/net/wireless/iwlegacy/iwl-4965-rx.c - kernel/msm-4.19 - Gitiles

 /******************************************************************************
  *
  * 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_pkt *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) {
 		D_CALIB(
 		    "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;

 	D_CALIB("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_IWLEGACY_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_pkt *pkt = rxb_addr(rxb);

 	D_RX(
 		     "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_IWLEGACY_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_pkt *pkt = rxb_addr(rxb);

 	if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
 #ifdef CONFIG_IWLEGACY_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
 		D_RX("Statistics have been cleared\n");
 	}
 	il4965_rx_statistics(il, rxb);
 }
	/******************************************************************************
	*
	* 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_pkt *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) {
	D_CALIB(
	"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;

	D_CALIB("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_IWLEGACY_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_pkt *pkt = rxb_addr(rxb);

	D_RX(
	"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_IWLEGACY_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_pkt *pkt = rxb_addr(rxb);

	if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
	#ifdef CONFIG_IWLEGACY_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
	D_RX("Statistics have been cleared\n");
	}
	il4965_rx_statistics(il, rxb);
	}