qcacld-3.0: support monitor mode enablement by changing driver mode

Support monitor mode enablement by changing driver mode, and also
remove the support that enable monitor mode with insmod parameter
"con_mode_monitor = 4", use "con_mode = 4" instead.

enable monitor mode steps for reference:
(1) change driver mode
   a. svc wifi disable
   b. echo 4 > /sys/module/wlan/parameters/con_mode
   c. ifconfig wlan0 up
   d. iwpriv wlan0 setMonChan 11 0

(2) insmod with kernal parameter way
   a. insmod /vendor/lib/modules/qca_cld3_wlan.ko con_mode=4
   b. ifconfig wlan0 up
   c. iwpriv wlan0 setMonChan 11 0

Change-Id: Ie615533d060261d545b3b92bea9916099ccccadd
CRs-Fixed: 2494158

core/cds/src/cds_api.c

@@ -92,7 +92,8 @@ static struct ol_if_ops  dp_ol_if_ops = {
 	.is_hw_dbs_2x2_capable = policy_mgr_is_hw_dbs_2x2_capable,
 	.lro_hash_config = target_if_lro_hash_config,
 	.rx_invalid_peer = wma_rx_invalid_peer_ind,
-	.is_roam_inprogress = wma_is_roam_in_progress
+	.is_roam_inprogress = wma_is_roam_in_progress,
+	.get_con_mode = cds_get_conparam
     /* TODO: Add any other control path calls required to OL_IF/WMA layer */
 };
 #else
@@ -784,7 +785,9 @@ QDF_STATUS cds_dp_open(struct wlan_objmgr_psoc *psoc)
 	}
 
 	dp_config.enable_rx_threads =
-		gp_cds_context->cds_cfg->enable_dp_rx_threads;
+		(cds_get_conparam() == QDF_GLOBAL_MONITOR_MODE) ?
+		false : gp_cds_context->cds_cfg->enable_dp_rx_threads;
+
 	qdf_status = dp_txrx_init(cds_get_context(QDF_MODULE_ID_SOC),
 				  cds_get_context(QDF_MODULE_ID_TXRX),
 				  &dp_config);

core/hdd/src/wlan_hdd_main.c

@@ -1070,7 +1070,6 @@ static int con_mode;
 
 static int con_mode_ftm;
 int con_mode_epping;
-int con_mode_monitor;
 
 /* Variable to hold connection mode including module parameter con_mode */
 static int curr_con_mode;
@@ -14642,26 +14641,6 @@ static int con_mode_handler_epping(const char *kmessage,
 }
 #endif
 
-#ifdef FEATURE_MONITOR_MODE_SUPPORT
-static int con_mode_handler_monitor(const char *kmessage,
-				    const struct kernel_param *kp)
-{
-	int ret;
-
-	ret = param_set_int(kmessage, kp);
-
-	if (con_mode_monitor != QDF_GLOBAL_MONITOR_MODE) {
-		pr_err("Only Monitor mode supported!");
-		return -ENOTSUPP;
-	}
-
-	hdd_set_conparam(con_mode_monitor);
-	con_mode = con_mode_monitor;
-
-	return ret;
-}
-#endif
-
 /**
  * hdd_get_conparam() - driver exit point
  *
@@ -15710,13 +15689,6 @@ static const struct kernel_param_ops con_mode_epping_ops = {
 };
 #endif
 
-#ifdef FEATURE_MONITOR_MODE_SUPPORT
-static const struct kernel_param_ops con_mode_monitor_ops = {
-	.set = con_mode_handler_monitor,
-	.get = param_get_int,
-};
-#endif
-
 static const struct kernel_param_ops fwpath_ops = {
 	.set = fwpath_changed_handler,
 	.get = param_get_string,
@@ -15733,11 +15705,6 @@ module_param_cb(con_mode_epping, &con_mode_epping_ops,
 		&con_mode_epping, 0644);
 #endif
 
-#ifdef FEATURE_MONITOR_MODE_SUPPORT
-module_param_cb(con_mode_monitor, &con_mode_monitor_ops, &con_mode_monitor,
-		S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
-#endif
-
 module_param_cb(fwpath, &fwpath_ops, &fwpath,
 		S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);