qcacmn: Skip STA scan on 6Ghz or 5ghz indoor chan if SAP is up

Currently STA can scan and come up on 6Ghz or indoor channel if
hardware is non-dbs and SAP is present

As part of this change, do not allow STA to scan on 6Ghz or
5Ghz indoor channel for non-dbs hardware if SAP is present

Change-Id: I97759f8b2c6a1c460d90fbb797a0e64d2532797c
CRs-Fixed: 3186406

umac/scan/core/src/wlan_scan_main.h

@@ -348,6 +348,8 @@ struct extscan_def_config {
  * @adaptive_dwell_time_mode_nc: adaptive dwell mode without connection
  * @honour_nl_scan_policy_flags: honour nl80211 scan policy flags
  * @extscan_adaptive_dwell_mode: Adaptive dwell mode during ext scan
+ * @skip_6g_and_indoor_freq: skip 6Ghz and 5Gh indoor freq channel for
+ * STA scan if hw is non-DBS and SAP is present
  * @scan_f_passive: passively scan all channels including active channels
  * @scan_f_bcast_probe: add wild card ssid prbreq even if ssid_list is specified
  * @scan_f_cck_rates: add cck rates to rates/xrates ie in prb req
@@ -440,6 +442,7 @@ struct scan_default_params {
 	enum scan_dwelltime_adaptive_mode adaptive_dwell_time_mode_nc;
 	bool honour_nl_scan_policy_flags;
 	enum scan_dwelltime_adaptive_mode extscan_adaptive_dwell_mode;
+	bool skip_6g_and_indoor_freq;
 	union {
 		struct {
 			uint32_t scan_f_passive:1,

umac/scan/core/src/wlan_scan_manager.c

@@ -842,6 +842,39 @@ static inline void scm_update_24g_chlist(struct scan_start_request *req)
 	req->scan_req.chan_list.num_chan = num_scan_channels;
 }
 
+/**
+ * scm_filter_6g_and_indoor_freq() - Modify channel list to skip 6Ghz and 5Ghz
+ * indoor channel if hw mode is non dbs and SAP is present
+ * @pdev: pointer to pdev
+ * @req: scan request
+ *
+ * Return: None
+ */
+static void scm_filter_6g_and_indoor_freq(struct wlan_objmgr_pdev *pdev,
+					  struct scan_start_request *req)
+{
+	uint32_t i;
+	uint32_t num_scan_channels;
+	qdf_freq_t freq;
+
+	num_scan_channels = 0;
+	for (i = 0; i < req->scan_req.chan_list.num_chan; i++) {
+		freq = req->scan_req.chan_list.chan[i].freq;
+		if (WLAN_REG_IS_6GHZ_CHAN_FREQ(freq))
+			continue;
+
+		if (wlan_reg_is_freq_indoor(pdev, freq))
+			continue;
+
+		req->scan_req.chan_list.chan[num_scan_channels++] =
+				req->scan_req.chan_list.chan[i];
+	}
+	if (num_scan_channels < req->scan_req.chan_list.num_chan)
+		scm_debug("6g and indoor channel chan skipped (%d, %d)",
+			  req->scan_req.chan_list.num_chan, num_scan_channels);
+	req->scan_req.chan_list.num_chan = num_scan_channels;
+}
+
 /**
  * scm_scan_chlist_concurrency_modify() - modify chan list to skip 5G if
  *    required
@@ -887,6 +920,17 @@ static inline void scm_scan_chlist_concurrency_modify(
 		if (trim & TRIM_CHANNEL_LIST_24G)
 			scm_update_24g_chlist(req);
 	}
+
+	/*
+	 * Do not allow STA to scan on 6Ghz or indoor channel for non dbs
+	 * hardware if SAP and skip_6g_and_indoor_freq_scan ini are present
+	 */
+	if (scan_obj->scan_def.skip_6g_and_indoor_freq &&
+	    !policy_mgr_is_hw_dbs_capable(psoc) &&
+	    (wlan_vdev_mlme_get_opmode(req->vdev) == QDF_STA_MODE) &&
+	    policy_mgr_mode_specific_connection_count(psoc, PM_SAP_MODE, NULL))
+		scm_filter_6g_and_indoor_freq(pdev, req);
+
 }
 #else
 static inline

umac/scan/dispatcher/inc/cfg_scan.h

@@ -1437,6 +1437,26 @@ enum scan_mode_6ghz {
 			false, \
 			"scan allow bss with corrupted ie")
 
+/*
+ * <ini>
+ * skip_6g_and_indoor_freq_scan - Skip scan on 6Ghz and indoor channel
+ * @Min: 0
+ * @Max: 1
+ * @Default: 0
+ *
+ * This ini is used to skip 6Ghz and 5Gh indoor freq for STA scan if hw is
+ * non-DBS and SAP is present
+ *
+ * Related: scan
+ *
+ * Usage: External
+ *
+ * <ini>
+ */
+#define CFG_SKIP_6GHZ_AND_INDOOR_FREQ_SCAN CFG_INI_BOOL( \
+			"skip_6g_and_indoor_freq_scan", \
+			false, \
+			"skip sta scan on 6Ghz and 5Ghz indoor channel")
 #define CFG_SCAN_ALL \
 	CFG(CFG_DROP_BCN_ON_CHANNEL_MISMATCH) \
 	CFG(CFG_DROP_BCN_ON_INVALID_FREQ) \
@@ -1475,6 +1495,7 @@ enum scan_mode_6ghz {
 	CFG(CFG_6GHZ_SCAN_MODE) \
 	CFG(CFG_6GHZ_SCAN_MODE_DUTY_CYCLE) \
 	CFG(CFG_SCAN_ALLOW_BSS_WITH_CORRUPTED_IE) \
+	CFG(CFG_SKIP_6GHZ_AND_INDOOR_FREQ_SCAN) \
 	CFG_SCAN_PNO
 
 #endif /* __CONFIG_SCAN_H */

umac/scan/dispatcher/inc/wlan_scan_api.h

@@ -419,4 +419,13 @@ void
 wlan_scan_unregister_requester(struct wlan_objmgr_psoc *psoc,
 			       wlan_scan_requester requester);
 
+/**
+ * wlan_scan_cfg_skip_6g_and_indoor_freq() - API to get 6g and indoor freq
+ * scan ini val
+ * @psoc: psoc object
+ *
+ * Return: skip 6g and indoor freq scan or not
+ */
+bool wlan_scan_cfg_skip_6g_and_indoor_freq(
+			struct wlan_objmgr_psoc *psoc);
 #endif

umac/scan/dispatcher/src/wlan_scan_api.c

@@ -643,3 +643,13 @@ wlan_scan_unregister_requester(struct wlan_objmgr_psoc *psoc,
 	qdf_spin_unlock_bh(&scan->lock);
 }
 
+bool wlan_scan_cfg_skip_6g_and_indoor_freq(struct wlan_objmgr_psoc *psoc)
+{
+	struct wlan_scan_obj *scan_obj;
+
+	scan_obj = wlan_psoc_get_scan_obj(psoc);
+	if (!scan_obj)
+		return false;
+
+	return scan_obj->scan_def.skip_6g_and_indoor_freq;
+}

umac/scan/dispatcher/src/wlan_scan_ucfg_api.c

@@ -818,6 +818,10 @@ wlan_scan_global_init(struct wlan_objmgr_psoc *psoc,
 		cfg_get(psoc, CFG_6GHZ_SCAN_MODE_DUTY_CYCLE);
 	scan_obj->allow_bss_with_incomplete_ie =
 		cfg_get(psoc, CFG_SCAN_ALLOW_BSS_WITH_CORRUPTED_IE);
+
+	scan_obj->scan_def.skip_6g_and_indoor_freq =
+		cfg_get(psoc, CFG_SKIP_6GHZ_AND_INDOOR_FREQ_SCAN);
+
 	/* init scan id seed */
 	qdf_atomic_init(&scan_obj->scan_ids);