qcacld-3.0: Add new config for BTM offload

Currently, whenever roaming is triggered after a successful roam scan
firmware sends a BTM query to current connected AP when it is 11v
capable. Driver completes roaming with candidates received as part of
BTM request from AP. STA respond to AP with BTM response after
successful initiation of roaming.

Now the requirement is FW could send "BTM query with a preferred
candidate list" after a successful roam scan for some roam scan reasons
like PER, LOW_RSSI, HIGH_RSSI, MAWC, DENSE etc. Preferred candidate list
is obtained as part of roam scan based on firmware bss scoring logic.

Add new ini "btm_query_bitmask" to configure the bitmask for roam scan
reasons which is sent to firmware as part of RSO start via wmi btm config
cmd. Fw sends "BTM query with preferred candidate list" only for those
roam scans which are enabled through this bitmask.
New INI: btm_query_bitmask
Min: 0
Max: 0xFFFFFFFF
Default: 0x8
Bitmask : 0x8 (LOW_RSSI) refer enum WMI_ROAM_TRIGGER_REASON_ID.

Change-Id: I24b538745f2ac88d4e5c990573234e0f8a881b1f
CRs-Fixed: 2408111

components/mlme/core/src/wlan_mlme_main.c

@@ -2017,6 +2017,8 @@ static void mlme_init_btm_cfg(struct wlan_objmgr_psoc *psoc,
 	btm->rct_validity_timer = cfg_get(psoc, CFG_BTM_VALIDITY_TIMER);
 	btm->disassoc_timer_threshold =
 			cfg_get(psoc, CFG_BTM_DISASSOC_TIMER_THRESHOLD);
+	btm->btm_query_bitmask = cfg_get(psoc, CFG_BTM_QUERY_BITMASK);
+
 }
 
 /**

components/mlme/dispatcher/inc/cfg_mlme_btm.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -236,6 +236,39 @@
 			CFG_VALUE_OR_DEFAULT, \
 			"BTM disassociation timer threshold")
 
+/*
+ * <ini>
+ * btm_query_bitmask - To send BTM query with candidate list on various roam
+ * scans reasons
+ * @Min: 0
+ * @Max: 0xFFFFFFFF
+ * @Default: 0x8
+ *
+ * This new ini is introduced to configure the bitmask for various roam scan
+ * reasons. Fw sends "BTM query with preferred candidate list" only for those
+ * roam scans which are enable through this bitmask.
+
+ * For Example:
+ * Bitmask : 0x8 (LOW_RSSI) refer enum WMI_ROAM_TRIGGER_REASON_ID
+ * Bitmask : 0xDA (PER, LOW_RSSI, HIGH_RSSI, MAWC, DENSE)
+ * refer enum WMI_ROAM_TRIGGER_REASON_ID
+ *
+ * Related: None
+ *
+ * Supported Feature: Roaming
+ *
+ * Usage: External
+ *
+ * </ini>
+ */
+#define CFG_BTM_QUERY_BITMASK CFG_INI_UINT( \
+			"btm_query_bitmask", \
+			0, \
+			0xFFFFFFFF, \
+			0x8, \
+			CFG_VALUE_OR_DEFAULT, \
+			"btm query with candidate list bitmask")
+
 #define CFG_BTM_ALL \
 	CFG(CFG_PREFER_BTM_QUERY) \
 	CFG(CFG_ENABLE_BTM_ABRIDGE) \
@@ -244,6 +277,7 @@
 	CFG(CFG_BTM_MAX_ATTEMPT_CNT) \
 	CFG(CFG_BTM_STICKY_TIME) \
 	CFG(CFG_BTM_VALIDITY_TIMER) \
-	CFG(CFG_BTM_DISASSOC_TIMER_THRESHOLD)
+	CFG(CFG_BTM_DISASSOC_TIMER_THRESHOLD) \
+	CFG(CFG_BTM_QUERY_BITMASK)
 
 #endif /* CFG_MLME_BTM_H_ */

components/mlme/dispatcher/inc/wlan_mlme_public_struct.h

@@ -1848,6 +1848,8 @@ struct wlan_mlme_wifi_pos_cfg {
  * @rct_validity_timer: Timeout values for roam cache table entries
  * @disassoc_timer_threshold: Disassociation timeout till which roam scan need
  * not be triggered
+ * @btm_query_bitmask: Bitmask to send BTM query with candidate list on
+ * various roam
  */
 struct wlan_mlme_btm {
 	bool prefer_btm_query;
@@ -1858,6 +1860,7 @@ struct wlan_mlme_btm {
 	uint32_t btm_sticky_time;
 	uint32_t rct_validity_timer;
 	uint32_t disassoc_timer_threshold;
+	uint32_t btm_query_bitmask;
 };
 
 /**

core/mac/inc/sir_api.h

@@ -2318,6 +2318,7 @@ struct roam_offload_scan_req {
 	bool bss_load_trig_enabled;
 	struct wmi_bss_load_config bss_load_config;
 	bool roaming_scan_policy;
+	uint32_t btm_query_bitmask;
 };
 
 struct roam_offload_scan_rsp {

core/sme/src/csr/csr_api_roam.c

@@ -18093,6 +18093,9 @@ csr_create_roam_scan_offload_request(struct mac_context *mac_ctx,
 	req_buf->rct_validity_timer = mac_ctx->mlme_cfg->btm.rct_validity_timer;
 	req_buf->disassoc_timer_threshold =
 		mac_ctx->mlme_cfg->btm.disassoc_timer_threshold;
+	req_buf->btm_query_bitmask =
+		mac_ctx->mlme_cfg->btm.btm_query_bitmask;
+
 
 #ifdef WLAN_FEATURE_ROAM_OFFLOAD
 	QDF_TRACE(QDF_MODULE_ID_SME, QDF_TRACE_LEVEL_DEBUG,

core/wma/src/wma_scan_roam.c

@@ -1425,9 +1425,11 @@ wma_roam_scan_btm_offload(tp_wma_handle wma_handle,
 	params->btm_max_attempt_cnt = roam_req->btm_max_attempt_cnt;
 	params->btm_sticky_time = roam_req->btm_sticky_time;
 	params->disassoc_timer_threshold = roam_req->disassoc_timer_threshold;
+	params->btm_query_bitmask = roam_req->btm_query_bitmask;
 
-	WMA_LOGD("%s: Sending BTM offload to FW for vdev %u btm_offload_config %u",
-		 __func__, params->vdev_id, params->btm_offload_config);
+	WMA_LOGD("%s: Sending BTM offload to FW for vdev %u btm_offload_config %u btm_query_bitmask %u",
+		 __func__, params->vdev_id, params->btm_offload_config,
+		params->btm_query_bitmask);
 
 	status = wmi_unified_send_btm_config(wma_handle->wmi_handle, params);
 	qdf_mem_free(params);