qcacmn: Enhance DCS event handler to support AWGN event

Handle DCS-AWGN event and take actions accordingly:
For STA mode, if the interference locates on primary 20MHz,
disconnect from AP; otherwise, find a max interference free width
and trigger channel change.
For SAP mode, if the interference locates on primary 20MHz,
try to select a random interference free channel and trigger channel
change (stop SAP if no channel is selected); otherwise, find a max
interference free width and trigger channel change.

Change-Id: I33e79f454b459b12ad84f8b0f3259403037464ee
CRs-Fixed: 2958675

umac/dcs/dispatcher/inc/wlan_dcs_public_structs.h

@@ -21,6 +21,20 @@
 #ifndef _WLAN_DCS_PUBLIC_STRUCTS_H_
 #define _WLAN_DCS_PUBLIC_STRUCTS_H_
 
+/**
+ * enum wlan_host_dcs_type - types of DCS interference events
+ * @WLAN_HOST_DCS_NONE: invalid type
+ * @WLAN_HOST_DCS_CWIM: continuous wave interference
+ * @WLAN_HOST_DCS_WLANIM: wlan interference stats
+ * @WLAN_HOST_DCS_AWGNIM: additive white Gaussian noise (awgn) interference
+ */
+enum wlan_host_dcs_type {
+	WLAN_HOST_DCS_NONE   = 0,      /* 0x0 */
+	WLAN_HOST_DCS_CWIM   = BIT(0), /* 0x1 */
+	WLAN_HOST_DCS_WLANIM = BIT(1), /* 0x2 */
+	WLAN_HOST_DCS_AWGNIM = BIT(2), /* 0x4 */
+};
+
 /**
  * struct wlan_host_dcs_interference_param - dcs interference parameters
  * @interference_type: type of DCS interference
@@ -119,4 +133,16 @@ struct wlan_host_dcs_awgn_info {
 	qdf_freq_t center_freq1;
 	uint32_t chan_bw_intf_bitmap;
 };
+
+/**
+ * struct wlan_host_dcs_event - define dcs event
+ * @wlan_stat: wlan interference target statistics
+ * @dcs_param: dcs event param
+ * @awgn_info: awgn info
+ */
+struct wlan_host_dcs_event {
+	struct wlan_host_dcs_im_tgt_stats wlan_stat;
+	struct wlan_host_dcs_interference_param dcs_param;
+	struct wlan_host_dcs_awgn_info awgn_info;
+};
 #endif

umac/dcs/dispatcher/inc/wlan_dcs_tgt_api.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2020-2021, 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 above
@@ -25,26 +25,16 @@
 #include <wlan_objmgr_cmn.h>
 #include <wlan_dcs_public_structs.h>
 
-/**
- * struct dcs_stats_event - define dcs stats event
- * @wlan_stat: wlan interference target statistics
- * @dcs_param: dcs event param
- */
-struct dcs_stats_event {
-	struct wlan_host_dcs_im_tgt_stats wlan_stat;
-	struct wlan_host_dcs_interference_param dcs_param;
-};
-
 /**
  * tgt_dcs_process_event(): dcs FW event process
  * @psoc: pointer to psoc object
- * @event: pointer to dcs stats event
+ * @event: pointer to dcs event
  *
  * This function gets called to process dcs FW event
  *
  * Return: QDF_STATUS
  */
 QDF_STATUS tgt_dcs_process_event(struct wlan_objmgr_psoc *psoc,
-				 struct dcs_stats_event *event);
+				 struct wlan_host_dcs_event *event);
 
 #endif /* __WLAN_DCS_TGT_API_H__ */

umac/dcs/dispatcher/inc/wlan_dcs_ucfg_api.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2020-2021, 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 above
@@ -25,16 +25,6 @@
 #include <wlan_objmgr_pdev_obj.h>
 #include <wlan_dcs_public_structs.h>
 
-/**
- * @brief List of DCS capabilities that can be set or unset
- *      dynamically
- * @see UMAC auto channel selection document for details on each feature
- *
- */
-#define CAP_DCS_CWIM   0x1
-#define CAP_DCS_WLANIM 0x2
-#define CAP_DCS_MASK   (CAP_DCS_CWIM | CAP_DCS_WLANIM)
-
 /**
  * typedef dcs_callback() - DCS callback
  * @psoc: Pointer to psoc
@@ -48,6 +38,16 @@ typedef void (*dcs_callback)(
 		uint8_t interference_type,
 		void *arg);
 
+/**
+ * typedef dcs_switch_chan_cb() - DCS callback for switching channel
+ * @vdev: Pointer to vdev
+ * @tgt_freq: target channel frequency
+ * @tgt_width: target channel width
+ */
+typedef QDF_STATUS (*dcs_switch_chan_cb)(struct wlan_objmgr_vdev *vdev,
+					 qdf_freq_t tgt_freq,
+					 enum phy_ch_width tgt_width);
+
 #ifdef DCS_INTERFERENCE_DETECTION
 /**
  * ucfg_dcs_register_cb() - API to register dcs callback
@@ -79,6 +79,16 @@ void ucfg_dcs_register_user_cb(struct wlan_objmgr_psoc *psoc,
 				      struct wlan_host_dcs_im_user_stats *stats,
 				      int status));
 
+/**
+ * ucfg_dcs_register_awgn_cb() - API to register dcs awgn callback
+ * @psoc: pointer to psoc object
+ * @cb: dcs switch channel callback to be registered
+ *
+ * Return: QDF_STATUS
+ */
+QDF_STATUS ucfg_dcs_register_awgn_cb(struct wlan_objmgr_psoc *psoc,
+				     dcs_switch_chan_cb cb);
+
 /**
  * ucfg_wlan_dcs_cmd(): API to send dcs command
  * @psoc: pointer to psoc object
@@ -98,7 +108,7 @@ ucfg_wlan_dcs_cmd(struct wlan_objmgr_psoc *psoc,
  * ucfg_config_dcs_enable() - API to config dcs enable
  * @psoc: pointer to psoc object
  * @mac_id: mac id
- * @interference_type: CAP_DCS_CWIM, CAP_DCS_WLANIM, CAP_DCS_MASK
+ * @interference_type: type mask(WLAN_HOST_DCS_CWIM / WLAN_HOST_DCS_WLANIM)
  *
  * This function gets called to config dcs enable
  *
@@ -112,7 +122,7 @@ void ucfg_config_dcs_enable(struct wlan_objmgr_psoc *psoc,
  * ucfg_config_dcs_disable() - API to config dcs disable
  * @psoc: pointer to psoc object
  * @mac_id: mac id
- * @interference_type: CAP_DCS_CWIM, CAP_DCS_WLANIM, CAP_DCS_MASK
+ * @interference_type: type mask(WLAN_HOST_DCS_CWIM / WLAN_HOST_DCS_WLANIM)
  *
  * This function gets called to config dcs disable
  *