qcacmn: Remove redundant ETSI preCAC APIs

As part of the ETSI preCAC feature, every 20MHz channel that is CACed
and not in NOL is maintained in a list which is then checked during every
channel switch for CAC reuse (avoiding CAC).

With the introduction of preCAC list(Binary Search Forest) for
20, 40 and 80MHz channels which also includes the current channel CAC
information, the ETSI preCAC list has become redundant.

Remove all APIs and changes that support the redundant ETSI preCAC list.

Change-Id: Ie71e2fda3f6f62ec6ea312c3bf0bdfc53a7df003
CRs-Fixed: 2484864

umac/dfs/core/src/dfs.h

@@ -1138,10 +1138,6 @@ struct wlan_dfs {
 #endif
 	TAILQ_HEAD(, dfs_precac_entry) dfs_precac_list;
 	enum phy_ch_width dfs_precac_chwidth;
-#ifdef QCA_SUPPORT_ETSI_PRECAC_DFS
-	TAILQ_HEAD(, dfs_etsi_precac_entry) dfs_etsiprecac_required_list;
-	TAILQ_HEAD(, dfs_etsi_precac_entry) dfs_etsiprecac_done_list;
-#endif
 
 	struct dfs_channel *dfs_curchan;
 	struct dfs_channel dfs_cac_started_chan;

umac/dfs/core/src/dfs_etsi_precac.h

@@ -1,237 +0,0 @@
-/*
- * Copyright (c) 2016-2019 The Linux Foundation. All rights reserved.
- * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-/**
- * DOC: This file has ETSI Pre-CAC DFS APIs.
- */
-
-#ifndef _DFS_ETSI_PRECAC_H_
-#define _DFS_ETSI_PRECAC_H_
-
-#include "dfs.h"
-
-#define VHT160_IEEE_FREQ_DIFF 16
-
-/**
- * struct dfs_etsi_precac_entry - PreCAC entry for ETSI domain
- * @pe_list:           ETSI PreCAC entry.
- * @ieee:              channel number
- * @etsi_caclst_ticks  start tick, OS speicfic.
- * @dfs:               Pointer to wlan_dfs structure.
- */
-struct dfs_etsi_precac_entry {
-	TAILQ_ENTRY(dfs_etsi_precac_entry) pe_list;
-	uint16_t          ieee;
-	unsigned long     etsi_caclst_ticks;
-	struct wlan_dfs   *dfs;
-};
-
-/**
- * dfs_print_etsi_precaclists() - Print etsi precac list.
- * @dfs: Pointer to wlan_dfs structure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_print_etsi_precaclists(struct wlan_dfs *dfs);
-#else
-static inline void dfs_print_etsi_precaclists(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_reset_etsi_precac_lists() - Resets the ETSI precac lists.
- * @dfs: Pointer to wlan_dfs structure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_reset_etsi_precac_lists(struct wlan_dfs *dfs);
-#else
-static inline void dfs_reset_etsi_precac_lists(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_reset_etsiprecaclists()- Clears and initializes etsi_precac_required_list
- *                                etsi_precac_done_list.
- *
- * @dfs: Pointer to wlan_dfs structure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_reset_etsiprecaclists(struct wlan_dfs *dfs);
-#else
-static inline void dfs_reset_etsiprecaclists(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_add_to_etsi_precac_required_list()- Add channel to ETSI PreCAC Required
- * list.
- *
- * @dfs: Pointer to wlan_dfs structure.
- * @chan: Pointer to channel to be added to ETSI PreCAC Required List.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_add_to_etsi_precac_required_list(struct wlan_dfs *dfs, uint8_t *chan);
-#else
-static inline void dfs_add_to_etsi_precac_required_list(struct wlan_dfs *dfs,
-							uint8_t *chan)
-{
-}
-#endif
-
-/**
- * dfs_deinit_etsi_precac_list() - Clears the etsi precac list.
- * @dfs: Pointer to wlan_dfs dtructure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_deinit_etsi_precac_list(struct wlan_dfs *dfs);
-#else
-static inline void dfs_deinit_etsi_precac_list(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_etsi_precac_attach() - Initialize ETSI precac variables.
- * @dfs: Pointer to DFS structure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_etsi_precac_attach(struct wlan_dfs *dfs);
-#else
-static inline void dfs_etsi_precac_attach(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_etsi_precac_detach() - Free etsi_precac memory.
- * @dfs: Pointer to wlan_dfs dtructure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_etsi_precac_detach(struct wlan_dfs *dfs);
-#else
-static inline void dfs_etsi_precac_detach(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_init_etsiprecac_list() - Init ETSI precac list.
- * @dfs: Pointer to wlan_dfs dtructure.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_init_etsi_precac_list(struct wlan_dfs *dfs);
-#else
-static inline void dfs_init_etsi_precac_list(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-/**
- * dfs_is_subchan_in_etsi_precac_done_list() - Is HT20 sub channel
- *                                             in etsi precac done list.
- * @dfs: Pointer to wlan_dfs structure.
- * @channel: HT20 sub channel
- *
- * Return: If subchannel present in precac done list return 1.
- *         Otherwise return 0
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-int dfs_is_subchan_in_etsi_precac_done_list(struct wlan_dfs *dfs,
-					    uint8_t channel);
-#else
-static inline int dfs_is_subchan_in_etsi_precac_done_list(struct wlan_dfs *dfs)
-{
-	return 0;
-}
-#endif
-/**
- * dfs_is_etsi_precac_done() - Is precac done.
- * @dfs: Pointer to wlan_dfs structure.
- * @channel: Channel to be checked of dfs_channel structure.
- *
- * Return: If precac already done in channel, return 1. Otherwise return 0.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-bool dfs_is_etsi_precac_done(struct wlan_dfs *dfs, struct dfs_channel *channel);
-#else
-static inline bool
-dfs_is_etsi_precac_done(struct wlan_dfs *dfs, struct dfs_channel *channel)
-{
-	return false;
-}
-#endif
-
-/**
- * dfs_mark_etsi_precac_dfs() - Mark the precac channel as radar for ETSI.
- * @dfs: Pointer to wlan_dfs structure.
- * @channels: List of HT20 primary channels
- * @num_channels: Number of HT20 primary channels
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_mark_etsi_precac_dfs(struct wlan_dfs *dfs,
-			      uint8_t *channels, uint8_t num_channels);
-#else
-static inline void dfs_mark_etsi_precac_dfs(struct wlan_dfs *dfs,
-					    uint8_t *channels,
-					    uint8_t num_channels)
-{
-}
-#endif
-
-/**
- * dfs_add_chan_to_etsi_done_list() - Add subchannel to ETSI CAC done list,
- *                                       if present in ETSI CAC required list
- * @dfs: Pointer to wlan_dfs structure.
- * @channel: HT20 primary channel
- *
- * Return: If channel added to ETSI CAC done list, return 1. Otherwise return 0.
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-int dfs_add_chan_to_etsi_done_list(struct wlan_dfs *dfs, uint8_t channel);
-#else
-static inline int dfs_add_chan_to_etsi_done_list(struct wlan_dfs *dfs,
-						 uint8_t channel)
-{
-	return 0;
-}
-#endif
-
-/**
- * dfs_add_to_etsi_precac_done_list() - Add channel to ETSI CAC done list
- * @curchan: Pointer to dfs_channel structure.
- *
- */
-#if defined(QCA_SUPPORT_ETSI_PRECAC_DFS)
-void dfs_add_to_etsi_precac_done_list(struct wlan_dfs *dfs);
-#else
-static inline void dfs_add_to_etsi_precac_done_list(struct wlan_dfs *dfs)
-{
-}
-#endif
-
-#endif /* _DFS_ETSI_PRECAC_H_ */

umac/dfs/core/src/misc/dfs.c

@@ -31,7 +31,6 @@
 #include "../dfs_full_offload.h"
 #include <wlan_objmgr_vdev_obj.h>
 #include "wlan_dfs_utils_api.h"
-#include "../dfs_etsi_precac.h"
 #include "../dfs_partial_offload_radar.h"
 
 /* Disable NOL in FW. */
@@ -187,7 +186,6 @@ int dfs_attach(struct wlan_dfs *dfs)
 	}
 	dfs_cac_timer_attach(dfs);
 	dfs_zero_cac_attach(dfs);
-	dfs_etsi_precac_attach(dfs);
 	dfs_nol_attach(dfs);
 
 	/*
@@ -257,7 +255,6 @@ void dfs_detach(struct wlan_dfs *dfs)
 		dfs_main_detach(dfs);
 	dfs_zero_cac_detach(dfs);
 	dfs_nol_detach(dfs);
-	dfs_etsi_precac_detach(dfs);
 }
 
 #ifndef WLAN_DFS_STATIC_MEM_ALLOC
@@ -703,7 +700,6 @@ int dfs_control(struct wlan_dfs *dfs,
 		break;
 	case DFS_RESET_PRECAC_LISTS:
 		dfs_reset_precac_lists(dfs);
-		dfs_reset_etsi_precac_lists(dfs);
 		break;
 	case DFS_INJECT_SEQUENCE:
 		error = dfs_inject_synthetic_pulse_sequence(dfs, indata);

umac/dfs/core/src/misc/dfs_cac.c

@@ -30,7 +30,6 @@
 
 #include "../dfs_channel.h"
 #include "../dfs_zero_cac.h"
-#include "../dfs_etsi_precac.h"
 #include <wlan_objmgr_vdev_obj.h>
 #include "wlan_dfs_utils_api.h"
 #include "wlan_dfs_mlme_api.h"
@@ -122,10 +121,6 @@ static os_timer_func(dfs_cac_timeout)
 		dfs->dfs_curchan->dfs_ch_freq,
 		(qdf_system_ticks_to_msecs(qdf_system_ticks()) / 1000));
 
-	/* Once CAC is done, add channel to ETSI precacdone list*/
-	if (utils_get_dfsdomain(dfs->dfs_pdev_obj) == DFS_ETSI_DOMAIN)
-		dfs_add_to_etsi_precac_done_list(dfs);
-
 	/*
 	 * When radar is detected during a CAC we are woken up prematurely to
 	 * switch to a new channel. Check the channel to decide how to act.
@@ -387,13 +382,6 @@ bool dfs_is_cac_required(struct wlan_dfs *dfs,
 		return false;
 	}
 
-	if (dfs_is_etsi_precac_done(dfs, cur_chan)) {
-		dfs_debug(dfs, WLAN_DEBUG_DFS,
-			  "ETSI PRE-CAC alreay done on this channel %d",
-			  dfs->dfs_curchan->dfs_ch_ieee);
-		return false;
-	}
-
 	/* If the channel has completed PRE-CAC then CAC can be skipped here. */
 	if (dfs_is_precac_done(dfs, cur_chan)) {
 		dfs_debug(dfs, WLAN_DEBUG_DFS,

umac/dfs/core/src/misc/dfs_nol.c

@@ -254,8 +254,6 @@ static os_timer_func(dfs_remove_from_nol)
 	dfs_debug(dfs, WLAN_DEBUG_DFS_NOL,
 		    "remove channel %d from nol", chan);
 	utils_dfs_unmark_precac_nol(dfs->dfs_pdev_obj, chan);
-	utils_dfs_add_to_etsi_precac_required_list(dfs->dfs_pdev_obj,
-						   &chan);
 	utils_dfs_reg_update_nol_ch(dfs->dfs_pdev_obj,
 				    &chan, 1, DFS_NOL_RESET);
 	utils_dfs_save_nol(dfs->dfs_pdev_obj);

umac/dfs/core/src/misc/dfs_process_radar_found_ind.c

@@ -23,7 +23,6 @@
 
 #include "../dfs.h"
 #include "../dfs_zero_cac.h"
-#include "../dfs_etsi_precac.h"
 #include "../dfs_process_radar_found_ind.h"
 #include <wlan_reg_services_api.h>
 #include <wlan_objmgr_vdev_obj.h>
@@ -899,13 +898,6 @@ QDF_STATUS dfs_process_radar_ind(struct wlan_dfs *dfs,
 			    channels,
 			    num_channels);
 
-	if (utils_get_dfsdomain(dfs->dfs_pdev_obj) == DFS_ETSI_DOMAIN) {
-		/* Remove chan from ETSI Pre-CAC Cleared List*/
-		dfs_info(dfs, WLAN_DEBUG_DFS_NOL,
-			 "%s : %d remove channel from ETSI PreCAC List\n",
-			 __func__, __LINE__);
-		dfs_mark_etsi_precac_dfs(dfs, channels, num_channels);
-	}
 	/*
 	 * This calls into the umac DFS code, which sets the umac
 	 * related radar flags and begins the channel change

umac/dfs/dispatcher/inc/wlan_dfs_utils_api.h

@@ -133,43 +133,6 @@ QDF_STATUS utils_dfs_reset_precaclists(struct wlan_objmgr_pdev *pdev);
  */
 void utils_dfs_unmark_precac_nol(struct wlan_objmgr_pdev *pdev, uint8_t chan);
 
-/**
- * utils_dfs_reset_etsi_precaclists() - Clears and initializes etsi
- *                                      precac_required_list,
- *                                      etsi precac_done_list and
- *                                      etsi precac_nol_list.
- * @pdev: Pointer to DFS pdev object.
- *
- * Wrapper function for dfs_reset_etsiprecaclists(). This function called from
- * outside of DFS component.
- */
-#ifdef QCA_SUPPORT_ETSI_PRECAC_DFS
-QDF_STATUS utils_dfs_reset_etsi_precaclists(struct wlan_objmgr_pdev *pdev);
-#else
-static inline QDF_STATUS utils_dfs_reset_etsi_precaclists(
-		struct wlan_objmgr_pdev *pdev)
-{
-	return QDF_STATUS_SUCCESS;
-}
-#endif
-
-/** utils_dfs_add_to_etsi_precac_required_list() - Add channel to ETSI PreCAC
- * Required list.
- * @pdev: Pointer to DFS pdev object.
- * @chan: Pointer to channel to be added to ETSI PreCAC Required List.
- *
- * Return: void
- */
-#ifdef QCA_SUPPORT_ETSI_PRECAC_DFS
-void utils_dfs_add_to_etsi_precac_required_list(struct wlan_objmgr_pdev *pdev,
-						uint8_t *chan);
-#else
-static inline void
-utils_dfs_add_to_etsi_precac_required_list(struct wlan_objmgr_pdev *pdev,
-					   uint8_t *chan)
-{
-}
-#endif
 /**
  * utils_dfs_cancel_precac_timer() - Cancel the precac timer.
  * @pdev: Pointer to DFS pdev object.

umac/dfs/dispatcher/src/wlan_dfs_utils_api.c

@@ -27,7 +27,6 @@
 #include "wlan_dfs_mlme_api.h"
 #include "../../core/src/dfs.h"
 #include "../../core/src/dfs_zero_cac.h"
-#include "../../core/src/dfs_etsi_precac.h"
 #include <wlan_reg_services_api.h>
 #include "../../core/src/dfs_random_chan_sel.h"
 #ifdef QCA_DFS_USE_POLICY_MANAGER
@@ -54,7 +53,6 @@ QDF_STATUS utils_dfs_reset(struct wlan_objmgr_pdev *pdev)
 	dfs_reset(dfs);
 	dfs_nol_update(dfs);
 	dfs_reset_precaclists(dfs);
-	dfs_reset_etsiprecaclists(dfs);
 
 	return QDF_STATUS_SUCCESS;
 }
@@ -113,37 +111,6 @@ void utils_dfs_unmark_precac_nol(struct wlan_objmgr_pdev *pdev, uint8_t chan)
 
 qdf_export_symbol(utils_dfs_unmark_precac_nol);
 
-#ifdef QCA_SUPPORT_ETSI_PRECAC_DFS
-QDF_STATUS utils_dfs_reset_etsi_precaclists(struct wlan_objmgr_pdev *pdev)
-{
-	struct wlan_dfs *dfs;
-
-	dfs = wlan_pdev_get_dfs_obj(pdev);
-	if (!dfs)
-		return  QDF_STATUS_E_FAILURE;
-
-	dfs_reset_etsiprecaclists(dfs);
-
-	return QDF_STATUS_SUCCESS;
-}
-
-qdf_export_symbol(utils_dfs_reset_etsi_precaclists);
-
-void utils_dfs_add_to_etsi_precac_required_list(struct wlan_objmgr_pdev *pdev,
-						uint8_t *chan)
-{
-	struct wlan_dfs *dfs;
-
-	dfs = wlan_pdev_get_dfs_obj(pdev);
-	if (!dfs)
-		return;
-
-	dfs_add_to_etsi_precac_required_list(dfs, chan);
-}
-
-qdf_export_symbol(utils_dfs_add_to_etsi_precac_required_list);
-#endif
-
 QDF_STATUS utils_dfs_cancel_precac_timer(struct wlan_objmgr_pdev *pdev)
 {
 	struct wlan_dfs *dfs;