core/sap/dfs/src/dfs.c

/*
 * Copyright (c) 2002-2016 The Linux Foundation. All rights reserved.
 *
 * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
 *
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This file was originally distributed by Qualcomm Atheros, Inc.
 * under proprietary terms before Copyright ownership was assigned
 * to the Linux Foundation.
 */

/*===========================================================================

				dfs.c

   OVERVIEW:

   Source code borrowed from QCA_MAIN DFS module

   DEPENDENCIES:

   Are listed for each API below.

   ===========================================================================*/

/*===========================================================================

			EDIT HISTORY FOR FILE

   This section contains comments describing changes made to the module.
   Notice that changes are listed in reverse chronological order.

   when        who     what, where, why
   ----------    ---    --------------------------------------------------------

   ===========================================================================*/

#include <osdep.h>

#ifndef ATH_SUPPORT_DFS
#define ATH_SUPPORT_DFS 1

/* #include "if_athioctl.h" */
/* #include "if_athvar.h" */
#include "dfs_ioctl.h"
#include "dfs.h"

int domainoverride = DFS_UNINIT_REGION;

/*
** channel switch announcement (CSA)
** usenol=1 (default) make CSA and switch to a new channel on radar detect
** usenol=0, make CSA with next channel same as current on radar detect
** usenol=2, no CSA and stay on the same channel on radar detect
**/

int usenol = 1;
uint32_t dfs_debug_level = ATH_DEBUG_DFS;

#if 0                           /* the code to call this is curently commented-out below */
/*
 * Mark a channel as having interference detected upon it.
 *
 * This adds the interference marker to both the primary and
 * extension channel.
 *
 * XXX TODO: make the NOL and channel interference logic a bit smarter
 * so only the channel with the radar event is marked, rather than
 * both the primary and extension.
 */
static void
dfs_channel_mark_radar(struct ath_dfs *dfs, struct dfs_ieee80211_channel *chan)
{
	struct ieee80211_channel_list chan_info;
	int i;

	/* chan->ic_flagext |= CHANNEL_INTERFERENCE; */

	/*
	 * If radar is detected in 40MHz mode, add both the primary and the
	 * extension channels to the NOL. chan is the channel data we return
	 * to the ath_dev layer which passes it on to the 80211 layer.
	 * As we want the AP to change channels and send out a CSA,
	 * we always pass back the primary channel data to the ath_dev layer.
	 */
	if ((dfs->dfs_rinfo.rn_use_nol == 1) &&
	    (dfs->ic->ic_opmode == IEEE80211_M_HOSTAP ||
	     dfs->ic->ic_opmode == IEEE80211_M_IBSS)) {
		chan_info.cl_nchans = 0;
		dfs->ic->ic_get_ext_chan_info(dfs->ic, &chan_info);

		for (i = 0; i < chan_info.cl_nchans; i++) {
			if (chan_info.cl_channels[i] == NULL) {
				DFS_PRINTK("%s: NULL channel\n", __func__);
			} else {
				chan_info.cl_channels[i]->ic_flagext |=
					CHANNEL_INTERFERENCE;
				dfs_nol_addchan(dfs, chan_info.cl_channels[i],
						dfs->ath_dfs_nol_timeout);
			}
		}

		/*
		 * Update the umac/driver channels with the new NOL information.
		 */
		dfs_nol_update(dfs);
	}
}
#endif /* #if 0 */

static os_timer_func(dfs_task)
{
	struct ieee80211com *ic;
	struct ath_dfs *dfs = NULL;

	OS_GET_TIMER_ARG(ic, struct ieee80211com *);
	dfs = (struct ath_dfs *)ic->ic_dfs;
	/*
	 * XXX no locking?!
	 */
	if (dfs_process_radarevent(dfs, ic->ic_curchan)) {
#ifndef ATH_DFS_RADAR_DETECTION_ONLY

		/*
		 * This marks the channel (and the extension channel, if HT40) as
		 * having seen a radar event.  It marks CHAN_INTERFERENCE and
		 * will add it to the local NOL implementation.
		 *
		 * This is only done for 'usenol=1', as the other two modes
		 * don't do radar notification or CAC/CSA/NOL; it just notes
		 * there was a radar.
		 */

		if (dfs->dfs_rinfo.rn_use_nol == 1) {
			/* dfs_channel_mark_radar(dfs, ic->ic_curchan); */
		}
#endif /* ATH_DFS_RADAR_DETECTION_ONLY */

		/*
		 * This calls into the umac DFS code, which sets the umac related
		 * radar flags and begins the channel change machinery.
		 *
		 * XXX TODO: the umac NOL code isn't used, but IEEE80211_CHAN_RADAR
		 * still gets set.  Since the umac NOL code isn't used, that flag
		 * is never cleared.  This needs to be fixed. See EV 105776.
		 */
		if (dfs->dfs_rinfo.rn_use_nol == 1) {
			ic->ic_dfs_notify_radar(ic, ic->ic_curchan);
		} else if (dfs->dfs_rinfo.rn_use_nol == 0) {
			/*
			 * For the test mode, don't do a CSA here; but setup the
			 * test timer so we get a CSA _back_ to the original channel.
			 */
			OS_CANCEL_TIMER(&dfs->ath_dfstesttimer);
			dfs->ath_dfstest = 1;
			qdf_spin_lock_bh(&ic->chan_lock);
			dfs->ath_dfstest_ieeechan = ic->ic_curchan->ic_ieee;
			qdf_spin_unlock_bh(&ic->chan_lock);
			dfs->ath_dfstesttime = 1;       /* 1ms */
			OS_SET_TIMER(&dfs->ath_dfstesttimer,
				     dfs->ath_dfstesttime);
		}
	}
	dfs->ath_radar_tasksched = 0;
}

static os_timer_func(dfs_testtimer_task)
{
	struct ieee80211com *ic;
	struct ath_dfs *dfs = NULL;

	OS_GET_TIMER_ARG(ic, struct ieee80211com *);
	dfs = (struct ath_dfs *)ic->ic_dfs;

	/* XXX no locking? */
	dfs->ath_dfstest = 0;

	/*
	 * Flip the channel back to the original channel.
	 * Make sure this is done properly with a CSA.
	 */
	DFS_PRINTK("%s: go back to channel %d\n",
		   __func__, dfs->ath_dfstest_ieeechan);

	/*
	 * XXX The mere existence of this method indirection
	 *     to a umac function means this code belongs in
	 *     the driver, _not_ here.  Please fix this!
	 */
	ic->ic_start_csa(ic, dfs->ath_dfstest_ieeechan);
}

static int dfs_get_debug_info(struct ieee80211com *ic, int type, void *data)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	if (data) {
		*(uint32_t *) data = dfs->dfs_proc_phyerr;
	}
	return (int)dfs->dfs_proc_phyerr;
}

/**
 * dfs_alloc_mem_filter() - allocate memory for dfs ft_filters
 * @radarf: pointer holding ft_filters
 *
 * Return: 0-success and 1-failure
*/
static int dfs_alloc_mem_filter(struct dfs_filtertype *radarf)
{
	int status = 0, n, i;

	for (i = 0; i < DFS_MAX_NUM_RADAR_FILTERS; i++) {
		radarf->ft_filters[i] = qdf_mem_malloc(sizeof(struct
							      dfs_filter));
		if (NULL == radarf->ft_filters[i]) {
			DFS_PRINTK("%s[%d]: mem alloc failed\n",
				    __func__, __LINE__);
			status = 1;
			goto error;
		}
	}

	return status;

error:
	/* free up allocated memory */
	for (n = 0; n < i; n++) {
		if (radarf->ft_filters[n]) {
			qdf_mem_free(radarf->ft_filters[n]);
			radarf->ft_filters[i] = NULL;
		}
	}

	DFS_PRINTK("%s[%d]: cannot allocate memory for radar filter types\n",
		    __func__, __LINE__);

	return status;
}

int dfs_attach(struct ieee80211com *ic)
{
	int i, n;
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	struct ath_dfs_radar_tab_info radar_info;

	if (dfs != NULL) {
		/*DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
		   "%s: ic_dfs was not NULL\n",
		   __func__);
		 */
		return 1;
	}

	dfs = (struct ath_dfs *)os_malloc(NULL, sizeof(struct ath_dfs),
						GFP_ATOMIC);

	if (dfs == NULL) {
		/*DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
		   "%s: ath_dfs allocation failed\n", __func__); */
		return 1;
	}

	OS_MEMZERO(dfs, sizeof(struct ath_dfs));

	ic->ic_dfs = (void *)dfs;

	dfs->ic = ic;

	ic->ic_dfs_debug = dfs_get_debug_info;
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
	dfs->dfs_nol = NULL;
#endif

	/*
	 * Zero out radar_info.  It's possible that the attach function won't
	 * fetch an initial regulatory configuration; you really do want to
	 * ensure that the contents indicates there aren't any filters.
	 */
	OS_MEMZERO(&radar_info, sizeof(radar_info));
	ic->ic_dfs_attach(ic, &dfs->dfs_caps, &radar_info);
	dfs_clear_stats(ic);
	dfs->dfs_event_log_on = 0;
	OS_INIT_TIMER(NULL, &(dfs->ath_dfs_task_timer), dfs_task, (void *)(ic),
		QDF_TIMER_TYPE_SW);
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
	OS_INIT_TIMER(NULL, &(dfs->ath_dfstesttimer), dfs_testtimer_task,
		      (void *)ic, QDF_TIMER_TYPE_SW);
	dfs->ath_dfs_cac_time = ATH_DFS_WAIT_MS;
	dfs->ath_dfstesttime = ATH_DFS_TEST_RETURN_PERIOD_MS;
#endif
	ATH_DFSQ_LOCK_INIT(dfs);
	STAILQ_INIT(&dfs->dfs_radarq);
	ATH_ARQ_LOCK_INIT(dfs);
	STAILQ_INIT(&dfs->dfs_arq);
	STAILQ_INIT(&(dfs->dfs_eventq));
	ATH_DFSEVENTQ_LOCK_INIT(dfs);
	dfs->events = (struct dfs_event *)os_malloc(NULL,
						    sizeof(struct dfs_event) *
						    DFS_MAX_EVENTS, GFP_ATOMIC);
	if (dfs->events == NULL) {
		OS_FREE(dfs);
		ic->ic_dfs = NULL;
		DFS_PRINTK("%s: events allocation failed\n", __func__);
		return 1;
	}
	for (i = 0; i < DFS_MAX_EVENTS; i++) {
		STAILQ_INSERT_TAIL(&(dfs->dfs_eventq), &dfs->events[i],
				   re_list);
	}

	dfs->pulses =
		(struct dfs_pulseline *)os_malloc(NULL,
						  sizeof(struct dfs_pulseline),
						  GFP_ATOMIC);
	if (dfs->pulses == NULL) {
		OS_FREE(dfs->events);
		dfs->events = NULL;
		OS_FREE(dfs);
		ic->ic_dfs = NULL;
		DFS_PRINTK("%s: pulse buffer allocation failed\n", __func__);
		return 1;
	}

	/*
	 * If the chip supports DFS-3 then allocate
	 * memory for pulses for extension segment.
	 */
	if (ic->dfs_hw_bd_id !=  DFS_HWBD_QCA6174) {
		dfs->pulses_ext_seg = (struct dfs_pulseline *)
					os_malloc(NULL,
						sizeof(struct dfs_pulseline),
						GFP_ATOMIC);
		if (dfs->pulses_ext_seg == NULL) {
			OS_FREE(dfs->events);
			dfs->events = NULL;
			OS_FREE(dfs);
			ic->ic_dfs = NULL;
			QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
			    "%s[%d]: pulse buffer allocation failed",
			    __func__, __LINE__);
			return 1;
		}
		dfs->pulses_ext_seg->pl_lastelem = DFS_MAX_PULSE_BUFFER_MASK;
	}

	dfs->pulses->pl_lastelem = DFS_MAX_PULSE_BUFFER_MASK;

	/* Allocate memory for radar filters */
	for (n = 0; n < DFS_MAX_RADAR_TYPES; n++) {
		dfs->dfs_radarf[n] = (struct dfs_filtertype *)
			os_malloc(NULL, sizeof(struct dfs_filtertype),
				  GFP_ATOMIC);
		if (dfs->dfs_radarf[n] == NULL) {
			DFS_PRINTK
				("%s: cannot allocate memory for radar filter types\n",
				__func__);
			goto bad1;
		} else {
			qdf_mem_zero(dfs->dfs_radarf[n],
				   sizeof(struct dfs_filtertype));
			if (0 != dfs_alloc_mem_filter(dfs->dfs_radarf[n]))
				goto bad1;
		}
	}
	/* Allocate memory for radar table */
	dfs->dfs_radartable =
		(int8_t **) os_malloc(NULL, 256 * sizeof(int8_t *), GFP_ATOMIC);
	if (dfs->dfs_radartable == NULL) {
		DFS_PRINTK("%s: cannot allocate memory for radar table\n",
			   __func__);
		goto bad1;
	}
	for (n = 0; n < 256; n++) {
		dfs->dfs_radartable[n] =
			os_malloc(NULL, DFS_MAX_RADAR_OVERLAP * sizeof(int8_t),
				  GFP_ATOMIC);
		if (dfs->dfs_radartable[n] == NULL) {
			DFS_PRINTK
				("%s: cannot allocate memory for radar table entry\n",
				__func__);
			goto bad2;
		}
	}

	if (usenol == 0)
		DFS_PRINTK("%s: NOL disabled\n", __func__);
	else if (usenol == 2)
		DFS_PRINTK("%s: NOL disabled; no CSA\n", __func__);

	dfs->dfs_rinfo.rn_use_nol = usenol;

	/* Init the cached extension channel busy for false alarm reduction */
	dfs->dfs_rinfo.ext_chan_busy_ts = ic->ic_get_TSF64(ic);
	dfs->dfs_rinfo.dfs_ext_chan_busy = 0;
	/* Init the Bin5 chirping related data */
	dfs->dfs_rinfo.dfs_bin5_chirp_ts = dfs->dfs_rinfo.ext_chan_busy_ts;
	dfs->dfs_rinfo.dfs_last_bin5_dur = MAX_BIN5_DUR;
	dfs->dfs_b5radars = NULL;
	if (ic->dfs_hw_bd_id !=  DFS_HWBD_QCA6174) {
		dfs->dfs_rinfo.dfs_last_bin5_dur_ext_seg = MAX_BIN5_DUR;
		dfs->dfs_b5radars_ext_seg = NULL;
	}

	/*
	 * If dfs_init_radar_filters() fails, we can abort here and
	 * reconfigure when the first valid channel + radar config
	 * is available.
	 */
	if (dfs_init_radar_filters(ic, &radar_info)) {
		DFS_PRINTK(" %s: Radar Filter Intialization Failed \n",
			   __func__);
		return 1;
	}

	dfs->ath_dfs_false_rssi_thres = RSSI_POSSIBLY_FALSE;
	dfs->ath_dfs_peak_mag = SEARCH_FFT_REPORT_PEAK_MAG_THRSH;
	dfs->dfs_phyerr_freq_min = 0x7fffffff;
	dfs->dfs_phyerr_freq_max = 0;
	dfs->dfs_phyerr_queued_count = 0;
	dfs->dfs_phyerr_w53_counter = 0;
	dfs->dfs_pri_multiplier = 2;

	dfs->ath_dfs_nol_timeout = DFS_NOL_TIMEOUT_S;
	return 0;

bad2:
	OS_FREE(dfs->dfs_radartable);
	dfs->dfs_radartable = NULL;
bad1:
	for (n = 0; n < DFS_MAX_RADAR_TYPES; n++) {
		if (dfs->dfs_radarf[n] != NULL) {
			OS_FREE(dfs->dfs_radarf[n]);
			dfs->dfs_radarf[n] = NULL;
		}
	}
	if (dfs->pulses) {
		OS_FREE(dfs->pulses);
		dfs->pulses = NULL;
	}
	if (dfs->pulses_ext_seg &&
	    ic->dfs_hw_bd_id !=  DFS_HWBD_QCA6174) {
		OS_FREE(dfs->pulses_ext_seg);
		dfs->pulses_ext_seg = NULL;
	}
	if (dfs->events) {
		OS_FREE(dfs->events);
		dfs->events = NULL;
	}

	if (ic->ic_dfs) {
		OS_FREE(ic->ic_dfs);
		ic->ic_dfs = NULL;
	}
	return 1;
#undef N
}

/**
 * dfs_free_filter() - free memory allocated for dfs ft_filters
 * @radarf: pointer holding ft_filters
 *
 * Return: NA
*/
static void dfs_free_filter(struct dfs_filtertype *radarf)
{
	int i;

	for (i = 0; i < DFS_MAX_NUM_RADAR_FILTERS; i++) {
		if (radarf->ft_filters[i]) {
			qdf_mem_free(radarf->ft_filters[i]);
			radarf->ft_filters[i] = NULL;
		}
	}
}
void dfs_detach(struct ieee80211com *ic)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	int n, empty;

	if (dfs == NULL) {
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS1, "%s: ic_dfs is NULL\n",
			    __func__);
		return;
	}

	/* Bug 29099 make sure all outstanding timers are cancelled */

	if (dfs->ath_radar_tasksched) {
		OS_CANCEL_TIMER(&dfs->ath_dfs_task_timer);
		dfs->ath_radar_tasksched = 0;
	}

	if (dfs->ath_dfstest) {
		OS_CANCEL_TIMER(&dfs->ath_dfstesttimer);
		dfs->ath_dfstest = 0;
	}
#if 0
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
	if (dfs->ic_dfswait) {
		OS_CANCEL_TIMER(&dfs->ic_dfswaittimer);
		dfs->ath_dfswait = 0;
	}

	OS_CANCEL_TIMER(&dfs->sc_dfs_war_timer);
	if (dfs->dfs_nol != NULL) {
		struct dfs_nolelem *nol, *next;
		nol = dfs->dfs_nol;
		/* Bug 29099 - each NOL element has its own timer, cancel it and
		   free the element */
		while (nol != NULL) {
			OS_CANCEL_TIMER(&nol->nol_timer);
			next = nol->nol_next;
			OS_FREE(nol);
			nol = next;
		}
		dfs->dfs_nol = NULL;
	}
#endif
#endif

	/* Return radar events to free q */
	dfs_reset_radarq(dfs);
	dfs_reset_alldelaylines(dfs, DFS_80P80_SEG0);
	if (ic->dfs_hw_bd_id !=  DFS_HWBD_QCA6174)
		dfs_reset_alldelaylines(dfs, DFS_80P80_SEG1);

	/* Free up pulse log */
	if (dfs->pulses != NULL) {
		OS_FREE(dfs->pulses);
		dfs->pulses = NULL;
	}

	if (dfs->pulses_ext_seg != NULL) {
		OS_FREE(dfs->pulses_ext_seg);
		dfs->pulses_ext_seg = NULL;
	}

	for (n = 0; n < DFS_MAX_RADAR_TYPES; n++) {
		if (dfs->dfs_radarf[n] != NULL) {
			dfs_free_filter(dfs->dfs_radarf[n]);
			OS_FREE(dfs->dfs_radarf[n]);
			dfs->dfs_radarf[n] = NULL;
		}
	}

	if (dfs->dfs_radartable != NULL) {
		for (n = 0; n < 256; n++) {
			if (dfs->dfs_radartable[n] != NULL) {
				OS_FREE(dfs->dfs_radartable[n]);
				dfs->dfs_radartable[n] = NULL;
			}
		}
		OS_FREE(dfs->dfs_radartable);
		dfs->dfs_radartable = NULL;
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
		dfs->ath_dfs_isdfsregdomain = 0;
#endif
	}

	if (dfs->dfs_b5radars != NULL) {
		OS_FREE(dfs->dfs_b5radars);
		dfs->dfs_b5radars = NULL;
	}
	if (dfs->dfs_b5radars_ext_seg != NULL) {
		OS_FREE(dfs->dfs_b5radars_ext_seg);
		dfs->dfs_b5radars_ext_seg = NULL;
	}

/*      Commenting out since all the ar functions are obsolete and
 *      the function definition has been removed as part of dfs_ar.c
 * dfs_reset_ar(dfs);
 */
	ATH_ARQ_LOCK(dfs);
	empty = STAILQ_EMPTY(&(dfs->dfs_arq));
	ATH_ARQ_UNLOCK(dfs);
	if (!empty) {
/*
 *      Commenting out since all the ar functions are obsolete and
 *      the function definition has been removed as part of dfs_ar.c
 *
 *    dfs_reset_arq(dfs);
 */
	}
	if (dfs->events != NULL) {
		OS_FREE(dfs->events);
		dfs->events = NULL;
	}
	dfs_nol_timer_cleanup(dfs);
	OS_FREE(dfs);

	/* XXX? */
	ic->ic_dfs = NULL;
}

/*
 * This is called each time a channel change occurs, to (potentially) enable
 * the radar code.
 */
int dfs_radar_disable(struct ieee80211com *ic)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
#ifdef ATH_ENABLE_AR
	dfs->dfs_proc_phyerr &= ~DFS_AR_EN;
#endif
	dfs->dfs_proc_phyerr &= ~DFS_RADAR_EN;
	return 0;
}

/*
 * This is called each time a channel change occurs, to (potentially) enable
 * the radar code.
 */
int dfs_radar_enable(struct ieee80211com *ic,
		     struct ath_dfs_radar_tab_info *radar_info)
{
	int is_ext_ch;
	int is_fastclk = 0;
	int radar_filters_init_status = 0;
	/* uint32_t                        rfilt; */
	struct ath_dfs *dfs;
	struct dfs_state *rs_pri, *rs_ext;
	struct dfs_ieee80211_channel *chan = ic->ic_curchan, *ext_ch = NULL;
	is_ext_ch = IEEE80211_IS_CHAN_11N_HT40(ic->ic_curchan);
	dfs = (struct ath_dfs *)ic->ic_dfs;
	rs_pri = NULL;
	rs_ext = NULL;
#if 0
	int i;
#endif
	if (dfs == NULL) {
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS, "%s: ic_dfs is NULL\n",
			    __func__);

		return -EIO;
	}
	ic->ic_dfs_disable(ic);

	/*
	 * Setting country code might change the DFS domain
	 * so initialize the DFS Radar filters
	 */
	radar_filters_init_status = dfs_init_radar_filters(ic, radar_info);

	/*
	 * dfs_init_radar_filters() returns 1 on failure and
	 * 0 on success.
	 */
	if (DFS_STATUS_FAIL == radar_filters_init_status) {
		QDF_TRACE(QDF_MODULE_ID_SAP, QDF_TRACE_LEVEL_ERROR,
			  "%s[%d]: DFS Radar Filters Initialization Failed",
			  __func__, __LINE__);
		return -EIO;
	}

	if ((ic->ic_opmode == IEEE80211_M_HOSTAP
	     || ic->ic_opmode == IEEE80211_M_IBSS)) {

		if (IEEE80211_IS_CHAN_DFS(chan)) {

			uint8_t index_pri, index_ext;
#ifdef ATH_ENABLE_AR
			dfs->dfs_proc_phyerr |= DFS_AR_EN;
#endif
			dfs->dfs_proc_phyerr |= DFS_RADAR_EN;

			if (is_ext_ch) {
				ext_ch = ieee80211_get_extchan(ic);
			}
			dfs_reset_alldelaylines(dfs, DFS_80P80_SEG0);
			/*
			 * Extension segment delaylines will be
			 * enabled only when SAP operates in 80p80
			 * and both the channels are DFS.
			 */
			if (chan->ic_80p80_both_dfs)
				dfs_reset_alldelaylines(dfs, DFS_80P80_SEG1);

			rs_pri = dfs_getchanstate(dfs, &index_pri, 0);
			if (ext_ch) {
				rs_ext = dfs_getchanstate(dfs, &index_ext, 1);
			}
			if (rs_pri != NULL
			    && ((ext_ch == NULL) || (rs_ext != NULL))) {
				struct ath_dfs_phyerr_param pe;

				OS_MEMSET(&pe, '\0', sizeof(pe));

				if (index_pri != dfs->dfs_curchan_radindex) {
					dfs_reset_alldelaylines(dfs,
								DFS_80P80_SEG0);
					/*
					 * Reset only when ext segment is
					 * present
					 */
					if (chan->ic_80p80_both_dfs)
						dfs_reset_alldelaylines(dfs,
								DFS_80P80_SEG1);
				}
				dfs->dfs_curchan_radindex = (int16_t) index_pri;
				dfs->dfs_pri_multiplier_ini =
					radar_info->dfs_pri_multiplier;

				if (rs_ext)
					dfs->dfs_extchan_radindex =
						(int16_t) index_ext;

				ath_dfs_phyerr_param_copy(&pe,
							  &rs_pri->rs_param);
				DFS_DPRINTK(dfs, ATH_DEBUG_DFS3,
					    "%s: firpwr=%d, rssi=%d, height=%d, "
					    "prssi=%d, inband=%d, relpwr=%d, "
					    "relstep=%d, maxlen=%d\n",
					    __func__,
					    pe.pe_firpwr,
					    pe.pe_rrssi,
					    pe.pe_height,
					    pe.pe_prssi,
					    pe.pe_inband,
					    pe.pe_relpwr,
					    pe.pe_relstep, pe.pe_maxlen);

				ic->ic_dfs_enable(ic, &is_fastclk, &pe);
				DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
					    "Enabled radar detection on channel %d\n",
					    chan->ic_freq);
				dfs->dur_multiplier =
					is_fastclk ? DFS_FAST_CLOCK_MULTIPLIER :
					DFS_NO_FAST_CLOCK_MULTIPLIER;
				DFS_DPRINTK(dfs, ATH_DEBUG_DFS3,
					    "%s: duration multiplier is %d\n",
					    __func__, dfs->dur_multiplier);
			} else
				DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
					    "%s: No more radar states left\n",
					    __func__);
		}
	}

	return DFS_STATUS_SUCCESS;
}

int
dfs_control(struct ieee80211com *ic, u_int id,
	    void *indata, uint32_t insize, void *outdata, uint32_t *outsize)
{
	int error = 0;
	struct ath_dfs_phyerr_param peout;
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	struct dfs_ioctl_params *dfsparams;
	uint32_t val = 0;
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
	struct dfsreq_nolinfo *nol;
	uint32_t *data = NULL;
#endif /* ATH_DFS_RADAR_DETECTION_ONLY */
	int i;

	if (dfs == NULL) {
		error = -EINVAL;
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS1, "%s DFS is null\n", __func__);
		goto bad;
	}

	switch (id) {
	case DFS_SET_THRESH:
		if (insize < sizeof(struct dfs_ioctl_params) || !indata) {
			DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
				    "%s: insize=%d, expected=%zu bytes, indata=%p\n",
				    __func__, insize,
				    sizeof(struct dfs_ioctl_params), indata);
			error = -EINVAL;
			break;
		}
		dfsparams = (struct dfs_ioctl_params *)indata;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_FIRPWR, dfsparams->dfs_firpwr))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_RRSSI, dfsparams->dfs_rrssi))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_HEIGHT, dfsparams->dfs_height))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_PRSSI, dfsparams->dfs_prssi))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_INBAND, dfsparams->dfs_inband))
			error = -EINVAL;
		/* 5413 speicfic */
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_RELPWR, dfsparams->dfs_relpwr))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_RELSTEP, dfsparams->dfs_relstep))
			error = -EINVAL;
		if (!dfs_set_thresholds
			    (ic, DFS_PARAM_MAXLEN, dfsparams->dfs_maxlen))
			error = -EINVAL;
		break;
	case DFS_GET_THRESH:
		if (!outdata || !outsize
		    || *outsize < sizeof(struct dfs_ioctl_params)) {
			error = -EINVAL;
			break;
		}
		*outsize = sizeof(struct dfs_ioctl_params);
		dfsparams = (struct dfs_ioctl_params *)outdata;

		/*
		 * Fetch the DFS thresholds using the internal representation.
		 */
		(void)dfs_get_thresholds(ic, &peout);

		/*
		 * Convert them to the dfs IOCTL representation.
		 */
		ath_dfs_dfsparam_to_ioctlparam(&peout, dfsparams);
		break;
	case DFS_RADARDETECTS:
		if (!outdata || !outsize || *outsize < sizeof(uint32_t)) {
			error = -EINVAL;
			break;
		}
		*outsize = sizeof(uint32_t);
		*((uint32_t *) outdata) = dfs->ath_dfs_stats.num_radar_detects;
		break;
	case DFS_DISABLE_DETECT:
		dfs->dfs_proc_phyerr &= ~DFS_RADAR_EN;
		dfs->ic->ic_dfs_state.ignore_dfs = 1;
		DFS_PRINTK("%s enable detects, ignore_dfs %d\n",
			   __func__, dfs->ic->ic_dfs_state.ignore_dfs);
		break;
	case DFS_ENABLE_DETECT:
		dfs->dfs_proc_phyerr |= DFS_RADAR_EN;
		dfs->ic->ic_dfs_state.ignore_dfs = 0;
		DFS_PRINTK("%s enable detects, ignore_dfs %d\n",
			   __func__, dfs->ic->ic_dfs_state.ignore_dfs);
		break;
	case DFS_DISABLE_FFT:
		/* UMACDFS: TODO: val = ath_hal_dfs_config_fft(sc->sc_ah, false); */
		DFS_PRINTK("%s TODO disable FFT val=0x%x \n", __func__, val);
		break;
	case DFS_ENABLE_FFT:
		/* UMACDFS TODO: val = ath_hal_dfs_config_fft(sc->sc_ah, true); */
		DFS_PRINTK("%s TODO enable FFT val=0x%x \n", __func__, val);
		break;
	case DFS_SET_DEBUG_LEVEL:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		dfs->dfs_debug_mask = *(uint32_t *) indata;
		DFS_PRINTK("%s debug level now = 0x%x \n",
			   __func__, dfs->dfs_debug_mask);
		if (dfs->dfs_debug_mask & ATH_DEBUG_DFS3) {
			/* Enable debug Radar Event */
			dfs->dfs_event_log_on = 1;
		} else {
			dfs->dfs_event_log_on = 0;
		}
		break;
	case DFS_SET_FALSE_RSSI_THRES:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		dfs->ath_dfs_false_rssi_thres = *(uint32_t *) indata;
		DFS_PRINTK("%s false RSSI threshold now = 0x%x \n",
			   __func__, dfs->ath_dfs_false_rssi_thres);
		break;
	case DFS_SET_PEAK_MAG:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		dfs->ath_dfs_peak_mag = *(uint32_t *) indata;
		DFS_PRINTK("%s peak_mag now = 0x%x \n",
			   __func__, dfs->ath_dfs_peak_mag);
		break;
	case DFS_IGNORE_CAC:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		if (*(uint32_t *) indata) {
			dfs->ic->ic_dfs_state.ignore_cac = 1;
		} else {
			dfs->ic->ic_dfs_state.ignore_cac = 0;
		}
		DFS_PRINTK("%s ignore cac = 0x%x \n",
			   __func__, dfs->ic->ic_dfs_state.ignore_cac);
		break;
	case DFS_SET_NOL_TIMEOUT:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		if (*(int *)indata) {
			dfs->ath_dfs_nol_timeout = *(int *)indata;
		} else {
			dfs->ath_dfs_nol_timeout = DFS_NOL_TIMEOUT_S;
		}
		DFS_PRINTK("%s nol timeout = %d sec \n",
			   __func__, dfs->ath_dfs_nol_timeout);
		break;
#ifndef ATH_DFS_RADAR_DETECTION_ONLY
	case DFS_MUTE_TIME:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		data = (uint32_t *) indata;
		dfs->ath_dfstesttime = *data;
		dfs->ath_dfstesttime *= (1000); /* convert sec into ms */
		break;
	case DFS_GET_USENOL:
		if (!outdata || !outsize || *outsize < sizeof(uint32_t)) {
			error = -EINVAL;
			break;
		}
		*outsize = sizeof(uint32_t);
		*((uint32_t *) outdata) = dfs->dfs_rinfo.rn_use_nol;

		for (i = 0;
		     (i < DFS_EVENT_LOG_SIZE) && (i < dfs->dfs_event_log_count);
		     i++) {
			/* DFS_DPRINTK(sc, ATH_DEBUG_DFS,"ts=%llu diff_ts=%u rssi=%u dur=%u\n", dfs->radar_log[i].ts, dfs->radar_log[i].diff_ts, dfs->radar_log[i].rssi, dfs->radar_log[i].dur); */

		}
		dfs->dfs_event_log_count = 0;
		dfs->dfs_phyerr_count = 0;
		dfs->dfs_phyerr_reject_count = 0;
		dfs->dfs_phyerr_queued_count = 0;
		dfs->dfs_phyerr_freq_min = 0x7fffffff;
		dfs->dfs_phyerr_freq_max = 0;
		break;
	case DFS_SET_USENOL:
		if (insize < sizeof(uint32_t) || !indata) {
			error = -EINVAL;
			break;
		}
		dfs->dfs_rinfo.rn_use_nol = *(uint32_t *) indata;
		/* iwpriv markdfs in linux can do the same thing... */
		break;
	case DFS_GET_NOL:
		if (!outdata || !outsize
		    || *outsize < sizeof(struct dfsreq_nolinfo)) {
			error = -EINVAL;
			break;
		}
		*outsize = sizeof(struct dfsreq_nolinfo);
		nol = (struct dfsreq_nolinfo *)outdata;
		dfs_get_nol(dfs, (struct dfsreq_nolelem *)nol->dfs_nol,
			    &nol->ic_nchans);
		dfs_print_nol(dfs);
		break;
	case DFS_SET_NOL:
		if (insize < sizeof(struct dfsreq_nolinfo) || !indata) {
			error = -EINVAL;
			break;
		}
		nol = (struct dfsreq_nolinfo *)indata;
		dfs_set_nol(dfs, (struct dfsreq_nolelem *)nol->dfs_nol,
			    nol->ic_nchans);
		break;

	case DFS_SHOW_NOL:
		dfs_print_nol(dfs);
		break;
	case DFS_BANGRADAR:
#if 0                           /* MERGE_TBD */
		if (sc->sc_nostabeacons) {
			printk("No radar detection Enabled \n");
			break;
		}
#endif
		dfs->dfs_bangradar = 1;
		dfs->ath_radar_tasksched = 1;
		OS_SET_TIMER(&dfs->ath_dfs_task_timer, 0);
		break;
#endif /* ATH_DFS_RADAR_DETECTION_ONLY */
	default:
		error = -EINVAL;
	}
bad:
	return error;
}

int
dfs_set_thresholds(struct ieee80211com *ic, const uint32_t threshtype,
		   const uint32_t value)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	int16_t chanindex;
	struct dfs_state *rs;
	struct ath_dfs_phyerr_param pe;
	int is_fastclk = 0;     /* XXX throw-away */

	if (dfs == NULL) {
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS1, "%s: ic_dfs is NULL\n",
			    __func__);
		return 0;
	}

	chanindex = dfs->dfs_curchan_radindex;
	if ((chanindex < 0) || (chanindex >= DFS_NUM_RADAR_STATES)) {
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
			    "%s: chanindex = %d, DFS_NUM_RADAR_STATES=%d\n",
			    __func__, chanindex, DFS_NUM_RADAR_STATES);
		return 0;
	}

	DFS_DPRINTK(dfs, ATH_DEBUG_DFS,
		    "%s: threshtype=%d, value=%d\n", __func__, threshtype,
		    value);

	ath_dfs_phyerr_init_noval(&pe);

	rs = &(dfs->dfs_radar[chanindex]);
	switch (threshtype) {
	case DFS_PARAM_FIRPWR:
		rs->rs_param.pe_firpwr = (int32_t) value;
		pe.pe_firpwr = value;
		break;
	case DFS_PARAM_RRSSI:
		rs->rs_param.pe_rrssi = value;
		pe.pe_rrssi = value;
		break;
	case DFS_PARAM_HEIGHT:
		rs->rs_param.pe_height = value;
		pe.pe_height = value;
		break;
	case DFS_PARAM_PRSSI:
		rs->rs_param.pe_prssi = value;
		pe.pe_prssi = value;
		break;
	case DFS_PARAM_INBAND:
		rs->rs_param.pe_inband = value;
		pe.pe_inband = value;
		break;
	/* 5413 specific */
	case DFS_PARAM_RELPWR:
		rs->rs_param.pe_relpwr = value;
		pe.pe_relpwr = value;
		break;
	case DFS_PARAM_RELSTEP:
		rs->rs_param.pe_relstep = value;
		pe.pe_relstep = value;
		break;
	case DFS_PARAM_MAXLEN:
		rs->rs_param.pe_maxlen = value;
		pe.pe_maxlen = value;
		break;
	default:
		DFS_DPRINTK(dfs, ATH_DEBUG_DFS1,
			    "%s: unknown threshtype (%d)\n",
			    __func__, threshtype);
		break;
	}

	/*
	 * The driver layer dfs_enable routine is tasked with translating
	 * values from the global format to the per-device (HAL, offload)
	 * format.
	 */
	ic->ic_dfs_enable(ic, &is_fastclk, &pe);
	return 1;
}

int
dfs_get_thresholds(struct ieee80211com *ic, struct ath_dfs_phyerr_param *param)
{
	/* UMACDFS : TODO:ath_hal_getdfsthresh(sc->sc_ah, param); */

	OS_MEMZERO(param, sizeof(*param));

	(void)ic->ic_dfs_get_thresholds(ic, param);

	return 1;
}

uint16_t dfs_usenol(struct ieee80211com *ic)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	return dfs ? (uint16_t) dfs->dfs_rinfo.rn_use_nol : 0;
}

uint16_t dfs_isdfsregdomain(struct ieee80211com *ic)
{
	struct ath_dfs *dfs = (struct ath_dfs *)ic->ic_dfs;
	return dfs ? dfs->dfsdomain : 0;
}

#endif /* ATH_UPPORT_DFS */