path: root/drivers/net/wireless/ath/ath11k/spectral.c

// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
 * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
 */

#include <linux/relay.h>
#include "core.h"
#include "debug.h"

#define ATH11K_SPECTRAL_NUM_RESP_PER_EVENT	2
#define ATH11K_SPECTRAL_EVENT_TIMEOUT_MS	1

#define ATH11K_SPECTRAL_DWORD_SIZE		4
#define ATH11K_SPECTRAL_MIN_BINS		32
#define ATH11K_SPECTRAL_MIN_IB_BINS		(ATH11K_SPECTRAL_MIN_BINS >> 1)
#define ATH11K_SPECTRAL_MAX_IB_BINS(x)	((x)->hw_params.spectral.max_fft_bins >> 1)

#define ATH11K_SPECTRAL_SCAN_COUNT_MAX		4095

/* Max channel computed by sum of 2g and 5g band channels */
#define ATH11K_SPECTRAL_TOTAL_CHANNEL		41
#define ATH11K_SPECTRAL_SAMPLES_PER_CHANNEL	70
#define ATH11K_SPECTRAL_PER_SAMPLE_SIZE(x)	(sizeof(struct fft_sample_ath11k) + \
						 ATH11K_SPECTRAL_MAX_IB_BINS(x))
#define ATH11K_SPECTRAL_TOTAL_SAMPLE		(ATH11K_SPECTRAL_TOTAL_CHANNEL * \
						 ATH11K_SPECTRAL_SAMPLES_PER_CHANNEL)
#define ATH11K_SPECTRAL_SUB_BUFF_SIZE(x)	ATH11K_SPECTRAL_PER_SAMPLE_SIZE(x)
#define ATH11K_SPECTRAL_NUM_SUB_BUF		ATH11K_SPECTRAL_TOTAL_SAMPLE

#define ATH11K_SPECTRAL_20MHZ			20
#define ATH11K_SPECTRAL_40MHZ			40
#define ATH11K_SPECTRAL_80MHZ			80
#define ATH11K_SPECTRAL_160MHZ			160

#define ATH11K_SPECTRAL_SIGNATURE		0xFA

#define ATH11K_SPECTRAL_TAG_RADAR_SUMMARY	0x0
#define ATH11K_SPECTRAL_TAG_RADAR_FFT		0x1
#define ATH11K_SPECTRAL_TAG_SCAN_SUMMARY	0x2
#define ATH11K_SPECTRAL_TAG_SCAN_SEARCH		0x3

#define SPECTRAL_TLV_HDR_LEN				GENMASK(15, 0)
#define SPECTRAL_TLV_HDR_TAG				GENMASK(23, 16)
#define SPECTRAL_TLV_HDR_SIGN				GENMASK(31, 24)

#define SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN		GENMASK(7, 0)
#define SPECTRAL_SUMMARY_INFO0_OB_FLAG			BIT(8)
#define SPECTRAL_SUMMARY_INFO0_GRP_IDX			GENMASK(16, 9)
#define SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT		BIT(17)
#define SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB		GENMASK(27, 18)
#define SPECTRAL_SUMMARY_INFO0_FALSE_SCAN		BIT(28)
#define SPECTRAL_SUMMARY_INFO0_DETECTOR_ID		GENMASK(30, 29)
#define SPECTRAL_SUMMARY_INFO0_PRI80			BIT(31)

#define SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX		GENMASK(11, 0)
#define SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE		GENMASK(21, 12)
#define SPECTRAL_SUMMARY_INFO2_NARROWBAND_MASK		GENMASK(29, 22)
#define SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE		BIT(30)

struct spectral_tlv {
	__le32 timestamp;
	__le32 header;
} __packed;

struct spectral_summary_fft_report {
	__le32 timestamp;
	__le32 tlv_header;
	__le32 info0;
	__le32 reserve0;
	__le32 info2;
	__le32 reserve1;
} __packed;

struct ath11k_spectral_summary_report {
	struct wmi_dma_buf_release_meta_data meta;
	u32 timestamp;
	u8 agc_total_gain;
	u8 grp_idx;
	u16 inb_pwr_db;
	s16 peak_idx;
	u16 peak_mag;
	u8 detector_id;
	bool out_of_band_flag;
	bool rf_saturation;
	bool primary80;
	bool gain_change;
	bool false_scan;
};

#define SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID		GENMASK(1, 0)
#define SPECTRAL_FFT_REPORT_INFO0_FFT_NUM		GENMASK(4, 2)
#define SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK		GENMASK(16, 5)
#define SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX	GENMASK(27, 17)
#define SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX		GENMASK(30, 28)

#define SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB		GENMASK(8, 0)
#define SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB		GENMASK(16, 9)

#define SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS	GENMASK(7, 0)
#define SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE	GENMASK(17, 8)
#define SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB		GENMASK(24, 18)
#define SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB		GENMASK(31, 25)

struct spectral_search_fft_report {
	__le32 timestamp;
	__le32 tlv_header;
	__le32 info0;
	__le32 info1;
	__le32 info2;
	__le32 reserve0;
	u8 bins[];
} __packed;

struct ath11k_spectral_search_report {
	u32 timestamp;
	u8 detector_id;
	u8 fft_count;
	u16 radar_check;
	s16 peak_idx;
	u8 chain_idx;
	u16 base_pwr_db;
	u8 total_gain_db;
	u8 strong_bin_count;
	u16 peak_mag;
	u8 avg_pwr_db;
	u8 rel_pwr_db;
};

static struct dentry *create_buf_file_handler(const char *filename,
					      struct dentry *parent,
					      umode_t mode,
					      struct rchan_buf *buf,
					      int *is_global)
{
	struct dentry *buf_file;

	buf_file = debugfs_create_file(filename, mode, parent, buf,
				       &relay_file_operations);
	*is_global = 1;
	return buf_file;
}

static int remove_buf_file_handler(struct dentry *dentry)
{
	debugfs_remove(dentry);

	return 0;
}

static const struct rchan_callbacks rfs_scan_cb = {
	.create_buf_file = create_buf_file_handler,
	.remove_buf_file = remove_buf_file_handler,
};

static struct ath11k_vif *ath11k_spectral_get_vdev(struct ath11k *ar)
{
	struct ath11k_vif *arvif;

	lockdep_assert_held(&ar->conf_mutex);

	if (list_empty(&ar->arvifs))
		return NULL;

	/* if there already is a vif doing spectral, return that. */
	list_for_each_entry(arvif, &ar->arvifs, list)
		if (arvif->spectral_enabled)
			return arvif;

	/* otherwise, return the first vif. */
	return list_first_entry(&ar->arvifs, typeof(*arvif), list);
}

static int ath11k_spectral_scan_trigger(struct ath11k *ar)
{
	struct ath11k_vif *arvif;
	int ret;

	lockdep_assert_held(&ar->conf_mutex);

	arvif = ath11k_spectral_get_vdev(ar);
	if (!arvif)
		return -ENODEV;

	if (ar->spectral.mode == ATH11K_SPECTRAL_DISABLED)
		return 0;

	ar->spectral.is_primary </