[RFC v2 93/96] cl8k: add vns.h

[viktor.barna@celeno.com]

From: Viktor Barna <viktor.barna@celeno.com>

(Part of the split. Please, take a look at the cover letter for more
details).

Signed-off-by: Viktor Barna <viktor.barna@celeno.com>
---
 drivers/net/wireless/celeno/cl8k/vns.h | 65 ++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 drivers/net/wireless/celeno/cl8k/vns.h

diff --git a/drivers/net/wireless/celeno/cl8k/vns.h b/drivers/net/wireless/celeno/cl8k/vns.h
new file mode 100644
index 000000000000..904fa7a7fe1b
--- /dev/null
+++ b/drivers/net/wireless/celeno/cl8k/vns.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/* Copyright(c) 2019-2022, Celeno Communications Ltd. */
+
+#ifndef CL_VNS_H
+#define CL_VNS_H
+
+#include "def.h"
+
+/**
+ * DOC: VNS (=Very Near STA)
+ *
+ * Feature is responsible for TX power adjustment regarding to the STA
+ * location. Near stations should get signal with lower power to avoid
+ * saturation. Power is contolled for both transmitted data (%VNS_MODE_DATA)
+ * and autoresponse frames (%VNS_AUTO_REPLY), including both cases for
+ * connected and not connected stations.
+ *
+ * In order to determine, whether a station is in VNS range, we rely on the
+ * RSSI values, received from the firmware for every RX frame.
+ */
+
+#define VNS_MODE_DATA       0x1
+#define VNS_MODE_AUTO_REPLY 0x2
+#define VNS_MODE_ALL        (VNS_MODE_DATA | VNS_MODE_AUTO_REPLY)
+
+struct cl_vns_rssi_entry {
+	struct list_head list_all;
+	struct list_head list_addr;
+	unsigned long timestamp;
+	s8 strongset_rssi;
+	u8 addr[ETH_ALEN];
+};
+
+struct cl_vns_mgmt_db {
+	u32 num_entries;
+	struct list_head list_all;
+	struct list_head list_addr[STA_HASH_SIZE];
+};
+
+struct cl_vns_db {
+	bool enable;
+	bool dbg;
+	bool dbg_per_packet;
+	u16 interval_period;
+	spinlock_t lock;
+	struct cl_vns_mgmt_db mgmt_db;
+};
+
+struct cl_vns_sta_db {
+	bool is_very_near;
+	bool prev_decision;
+	s32 rssi_sum[MAX_ANTENNAS];
+	s32 rssi_samples;
+};
+
+int cl_vns_init(struct cl_hw *cl_hw);
+void cl_vns_close(struct cl_hw *cl_hw);
+void cl_vns_maintenance(struct cl_hw *cl_hw);
+void cl_vns_mgmt_handler(struct cl_hw *cl_hw, u8 *addr, s8 rssi[MAX_ANTENNAS]);
+bool cl_vns_is_very_near(struct cl_hw *cl_hw, struct cl_sta *cl_sta, struct sk_buff *skb);
+void cl_vns_sta_add(struct cl_hw *cl_hw, struct cl_sta *cl_sta);
+void cl_vns_handle_rssi(struct cl_hw *cl_hw, struct cl_sta *cl_sta, s8 rssi[MAX_ANTENNAS]);
+void cl_vns_recovery(struct cl_hw *cl_hw);
+
+#endif /* CL_VNS_H */
-- 
2.36.1