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kernel/drivers/net/wireless/ath/ath11k/spectral.c

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// 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.
*/
#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 = true;
ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
if (ret)
return ret;
ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
ATH11K_WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
if (ret)
return ret;
return 0;
}
static int ath11k_spectral_scan_config(struct ath11k *ar,
enum ath11k_spectral_mode mode)
{
struct ath11k_wmi_vdev_spectral_conf_param param = { 0 };
struct ath11k_vif *arvif;
int ret, count;
lockdep_assert_held(&ar->conf_mutex);
arvif = ath11k_spectral_get_vdev(ar);
if (!arvif)
return -ENODEV;
arvif->spectral_enabled = (mode != ATH11K_SPECTRAL_DISABLED);
spin_lock_bh(&ar->spectral.lock);
ar->spectral.mode = mode;
spin_unlock_bh(&ar->spectral.lock);
ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
ATH11K_WMI_SPECTRAL_ENABLE_CMD_DISABLE);
if (ret) {
ath11k_warn(ar->ab, "failed to enable spectral scan: %d\n", ret);
return ret;
}
if (mode == ATH11K_SPECTRAL_DISABLED)
return 0;
if (mode == ATH11K_SPECTRAL_BACKGROUND)
count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
else
count = max_t(u16, 1, ar->spectral.count);
param.vdev_id = arvif->vdev_id;
param.scan_count = count;
param.scan_fft_size = ar->spectral.fft_size;
param.scan_period = ATH11K_WMI_SPECTRAL_PERIOD_DEFAULT;
param.scan_priority = ATH11K_WMI_SPECTRAL_PRIORITY_DEFAULT;
param.scan_gc_ena = ATH11K_WMI_SPECTRAL_GC_ENA_DEFAULT;
param.scan_restart_ena = ATH11K_WMI_SPECTRAL_RESTART_ENA_DEFAULT;
param.scan_noise_floor_ref = ATH11K_WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
param.scan_init_delay = ATH11K_WMI_SPECTRAL_INIT_DELAY_DEFAULT;
param.scan_nb_tone_thr = ATH11K_WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
param.scan_str_bin_thr = ATH11K_WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
param.scan_wb_rpt_mode = ATH11K_WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
param.scan_rssi_rpt_mode = ATH11K_WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
param.scan_rssi_thr = ATH11K_WMI_SPECTRAL_RSSI_THR_DEFAULT;
param.scan_pwr_format = ATH11K_WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
param.scan_rpt_mode = ATH11K_WMI_SPECTRAL_RPT_MODE_DEFAULT;
param.scan_bin_scale = ATH11K_WMI_SPECTRAL_BIN_SCALE_DEFAULT;
param.scan_dbm_adj = ATH11K_WMI_SPECTRAL_DBM_ADJ_DEFAULT;
param.scan_chn_mask = ATH11K_WMI_SPECTRAL_CHN_MASK_DEFAULT;
ret = ath11k_wmi_vdev_spectral_conf(ar, &param);
if (ret) {
ath11k_warn(ar->ab, "failed to configure spectral scan: %d\n", ret);
return ret;
}
return 0;
}
static ssize_t ath11k_read_file_spec_scan_ctl(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
char *mode = "";
size_t len;
enum ath11k_spectral_mode spectral_mode;
mutex_lock(&ar->conf_mutex);
spectral_mode = ar->spectral.mode;
mutex_unlock(&ar->conf_mutex);
switch (spectral_mode) {
case ATH11K_SPECTRAL_DISABLED:
mode = "disable";
break;
case ATH11K_SPECTRAL_BACKGROUND:
mode = "background";
break;
case ATH11K_SPECTRAL_MANUAL:
mode = "manual";
break;
}
len = strlen(mode);
return simple_read_from_buffer(user_buf, count, ppos, mode, len);
}
static ssize_t ath11k_write_file_spec_scan_ctl(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
char buf[32];
ssize_t len;
int ret;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
mutex_lock(&ar->conf_mutex);
if (strncmp("trigger", buf, 7) == 0) {
if (ar->spectral.mode == ATH11K_SPECTRAL_MANUAL ||
ar->spectral.mode == ATH11K_SPECTRAL_BACKGROUND) {
/* reset the configuration to adopt possibly changed
* debugfs parameters
*/
ret = ath11k_spectral_scan_config(ar, ar->spectral.mode);
if (ret) {
ath11k_warn(ar->ab, "failed to reconfigure spectral scan: %d\n",
ret);
goto unlock;
}
ret = ath11k_spectral_scan_trigger(ar);
if (ret) {
ath11k_warn(ar->ab, "failed to trigger spectral scan: %d\n",
ret);
}
} else {
ret = -EINVAL;
}
} else if (strncmp("background", buf, 10) == 0) {
ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_BACKGROUND);
} else if (strncmp("manual", buf, 6) == 0) {
ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_MANUAL);
} else if (strncmp("disable", buf, 7) == 0) {
ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
} else {
ret = -EINVAL;
}
unlock:
mutex_unlock(&ar->conf_mutex);
if (ret)
return ret;
return count;
}
static const struct file_operations fops_scan_ctl = {
.read = ath11k_read_file_spec_scan_ctl,
.write = ath11k_write_file_spec_scan_ctl,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t ath11k_read_file_spectral_count(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
char buf[32];
size_t len;
u16 spectral_count;
mutex_lock(&ar->conf_mutex);
spectral_count = ar->spectral.count;
mutex_unlock(&ar->conf_mutex);
len = sprintf(buf, "%d\n", spectral_count);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t ath11k_write_file_spectral_count(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
unsigned long val;
ssize_t ret;
ret = kstrtoul_from_user(user_buf, count, 0, &val);
if (ret)
return ret;
if (val > ATH11K_SPECTRAL_SCAN_COUNT_MAX)
return -EINVAL;
mutex_lock(&ar->conf_mutex);
ar->spectral.count = val;
mutex_unlock(&ar->conf_mutex);
return count;
}
static const struct file_operations fops_scan_count = {
.read = ath11k_read_file_spectral_count,
.write = ath11k_write_file_spectral_count,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t ath11k_read_file_spectral_bins(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
char buf[32];
unsigned int bins, fft_size;
size_t len;
mutex_lock(&ar->conf_mutex);
fft_size = ar->spectral.fft_size;
bins = 1 << fft_size;
mutex_unlock(&ar->conf_mutex);
len = sprintf(buf, "%d\n", bins);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t ath11k_write_file_spectral_bins(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath11k *ar = file->private_data;
unsigned long val;
ssize_t ret;
ret = kstrtoul_from_user(user_buf, count, 0, &val);
if (ret)
return ret;
if (val < ATH11K_SPECTRAL_MIN_BINS ||
val > ar->ab->hw_params.spectral.max_fft_bins)
return -EINVAL;
if (!is_power_of_2(val))
return -EINVAL;
mutex_lock(&ar->conf_mutex);
ar->spectral.fft_size = ilog2(val);
mutex_unlock(&ar->conf_mutex);
return count;
}
static const struct file_operations fops_scan_bins = {
.read = ath11k_read_file_spectral_bins,
.write = ath11k_write_file_spectral_bins,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static int ath11k_spectral_pull_summary(struct ath11k *ar,
struct wmi_dma_buf_release_meta_data *meta,
struct spectral_summary_fft_report *summary,
struct ath11k_spectral_summary_report *report)
{
report->timestamp = __le32_to_cpu(summary->timestamp);
report->agc_total_gain = FIELD_GET(SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN,
__le32_to_cpu(summary->info0));
report->out_of_band_flag = FIELD_GET(SPECTRAL_SUMMARY_INFO0_OB_FLAG,
__le32_to_cpu(summary->info0));
report->grp_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO0_GRP_IDX,
__le32_to_cpu(summary->info0));
report->rf_saturation = FIELD_GET(SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT,
__le32_to_cpu(summary->info0));
report->inb_pwr_db = FIELD_GET(SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB,
__le32_to_cpu(summary->info0));
report->false_scan = FIELD_GET(SPECTRAL_SUMMARY_INFO0_FALSE_SCAN,
__le32_to_cpu(summary->info0));
report->detector_id = FIELD_GET(SPECTRAL_SUMMARY_INFO0_DETECTOR_ID,
__le32_to_cpu(summary->info0));
report->primary80 = FIELD_GET(SPECTRAL_SUMMARY_INFO0_PRI80,
__le32_to_cpu(summary->info0));
report->peak_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX,
__le32_to_cpu(summary->info2));
report->peak_mag = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE,
__le32_to_cpu(summary->info2));
report->gain_change = FIELD_GET(SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE,
__le32_to_cpu(summary->info2));
memcpy(&report->meta, meta, sizeof(*meta));
return 0;
}
static int ath11k_spectral_pull_search(struct ath11k *ar,
struct spectral_search_fft_report *search,
struct ath11k_spectral_search_report *report)
{
report->timestamp = __le32_to_cpu(search->timestamp);
report->detector_id = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID,
__le32_to_cpu(search->info0));
report->fft_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_FFT_NUM,
__le32_to_cpu(search->info0));
report->radar_check = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK,
__le32_to_cpu(search->info0));
report->peak_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
__le32_to_cpu(search->info0));
report->chain_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX,
__le32_to_cpu(search->info0));
report->base_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB,
__le32_to_cpu(search->info1));
report->total_gain_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB,
__le32_to_cpu(search->info1));
report->strong_bin_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS,
__le32_to_cpu(search->info2));
report->peak_mag = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE,
__le32_to_cpu(search->info2));
report->avg_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB,
__le32_to_cpu(search->info2));
report->rel_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB,
__le32_to_cpu(search->info2));
return 0;
}
static u8 ath11k_spectral_get_max_exp(s8 max_index, u8 max_magnitude,
int bin_len, u8 *bins)
{
int dc_pos;
u8 max_exp;
dc_pos = bin_len / 2;
/* peak index outside of bins */
if (dc_pos <= max_index || -dc_pos >= max_index)
return 0;
for (max_exp = 0; max_exp < 8; max_exp++) {
if (bins[dc_pos + max_index] == (max_magnitude >> max_exp))
break;
}
/* max_exp not found */
if (bins[dc_pos + max_index] != (max_magnitude >> max_exp))
return 0;
return max_exp;
}
static void ath11k_spectral_parse_fft(u8 *outbins, u8 *inbins, int num_bins, u8 fft_sz)
{
int i, j;
i = 0;
j = 0;
while (i < num_bins) {
outbins[i] = inbins[j];
i++;
j += fft_sz;
}
}
static
int ath11k_spectral_process_fft(struct ath11k *ar,
struct ath11k_spectral_summary_report *summary,
void *data,
struct fft_sample_ath11k *fft_sample,
u32 data_len)
{
struct ath11k_base *ab = ar->ab;
struct spectral_search_fft_report *fft_report = data;
struct ath11k_spectral_search_report search;
struct spectral_tlv *tlv;
int tlv_len, bin_len, num_bins;
u16 length, freq;
u8 chan_width_mhz, bin_sz;
int ret;
u32 check_length;
bool fragment_sample = false;
lockdep_assert_held(&ar->spectral.lock);
if (!ab->hw_params.spectral.fft_sz) {
ath11k_warn(ab, "invalid bin size type for hw rev %d\n",
ab->hw_rev);
return -EINVAL;
}
tlv = data;
tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN, __le32_to_cpu(tlv->header));
/* convert Dword into bytes */
tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
bin_len = tlv_len - ab->hw_params.spectral.fft_hdr_len;
if (data_len < (bin_len + sizeof(*fft_report))) {
ath11k_warn(ab, "mismatch in expected bin len %d and data len %d\n",
bin_len, data_len);
return -EINVAL;
}
bin_sz = ab->hw_params.spectral.fft_sz + ab->hw_params.spectral.fft_pad_sz;
num_bins = bin_len / bin_sz;
/* Only In-band bins are useful to user for visualize */
num_bins >>= 1;
if (num_bins < ATH11K_SPECTRAL_MIN_IB_BINS ||
num_bins > ATH11K_SPECTRAL_MAX_IB_BINS(ab) ||
!is_power_of_2(num_bins)) {
ath11k_warn(ab, "Invalid num of bins %d\n", num_bins);
return -EINVAL;
}
check_length = sizeof(*fft_report) + (num_bins * ab->hw_params.spectral.fft_sz);
ret = ath11k_dbring_validate_buffer(ar, data, check_length);
if (ret) {
ath11k_warn(ar->ab, "found magic value in fft data, dropping\n");
return ret;
}
ret = ath11k_spectral_pull_search(ar, data, &search);
if (ret) {
ath11k_warn(ab, "failed to pull search report %d\n", ret);
return ret;
}
chan_width_mhz = summary->meta.ch_width;
switch (chan_width_mhz) {
case ATH11K_SPECTRAL_20MHZ:
case ATH11K_SPECTRAL_40MHZ:
case ATH11K_SPECTRAL_80MHZ:
fft_sample->chan_width_mhz = chan_width_mhz;
break;
case ATH11K_SPECTRAL_160MHZ:
if (ab->hw_params.spectral.fragment_160mhz) {
chan_width_mhz /= 2;
fragment_sample = true;
}
fft_sample->chan_width_mhz = chan_width_mhz;
break;
default:
ath11k_warn(ab, "invalid channel width %d\n", chan_width_mhz);
return -EINVAL;
}
length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + num_bins;
fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH11K;
fft_sample->tlv.length = __cpu_to_be16(length);
fft_sample->tsf = __cpu_to_be32(search.timestamp);
fft_sample->max_magnitude = __cpu_to_be16(search.peak_mag);
fft_sample->max_index = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
__le32_to_cpu(fft_report->info0));
summary->inb_pwr_db >>= 1;
fft_sample->rssi = __cpu_to_be16(summary->inb_pwr_db);
fft_sample->noise = __cpu_to_be32(summary->meta.noise_floor[search.chain_idx]);
freq = summary->meta.freq1;
fft_sample->freq1 = __cpu_to_be16(freq);
freq = summary->meta.freq2;
fft_sample->freq2 = __cpu_to_be16(freq);
/* If freq2 is available then the spectral scan results are fragmented
* as primary and secondary
*/
if (fragment_sample && freq) {
if (!ar->spectral.is_primary)
fft_sample->freq1 = cpu_to_be16(freq);
/* We have to toggle the is_primary to handle the next report */
ar->spectral.is_primary = !ar->spectral.is_primary;
}
ath11k_spectral_parse_fft(fft_sample->data, fft_report->bins, num_bins,
ab->hw_params.spectral.fft_sz);
fft_sample->max_exp = ath11k_spectral_get_max_exp(fft_sample->max_index,
search.peak_mag,
num_bins,
fft_sample->data);
if (ar->spectral.rfs_scan)
relay_write(ar->spectral.rfs_scan, fft_sample,
length + sizeof(struct fft_sample_tlv));
return 0;
}
static int ath11k_spectral_process_data(struct ath11k *ar,
struct ath11k_dbring_data *param)
{
struct ath11k_base *ab = ar->ab;
struct spectral_tlv *tlv;
struct spectral_summary_fft_report *summary = NULL;
struct ath11k_spectral_summary_report summ_rpt;
struct fft_sample_ath11k *fft_sample = NULL;
u8 *data;
u32 data_len, i;
u8 sign, tag;
int tlv_len, sample_sz;
int ret;
bool quit = false;
spin_lock_bh(&ar->spectral.lock);
if (!ar->spectral.enabled) {
ret = -EINVAL;
goto unlock;
}
sample_sz = sizeof(*fft_sample) + ATH11K_SPECTRAL_MAX_IB_BINS(ab);
fft_sample = kmalloc(sample_sz, GFP_ATOMIC);
if (!fft_sample) {
ret = -ENOBUFS;
goto unlock;
}
data = param->data;
data_len = param->data_sz;
i = 0;
while (!quit && (i < data_len)) {
if ((i + sizeof(*tlv)) > data_len) {
ath11k_warn(ab, "failed to parse spectral tlv hdr at bytes %d\n",
i);
ret = -EINVAL;
goto err;
}
tlv = (struct spectral_tlv *)&data[i];
sign = FIELD_GET(SPECTRAL_TLV_HDR_SIGN,
__le32_to_cpu(tlv->header));
if (sign != ATH11K_SPECTRAL_SIGNATURE) {
ath11k_warn(ab, "Invalid sign 0x%x at bytes %d\n",
sign, i);
ret = -EINVAL;
goto err;
}
tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN,
__le32_to_cpu(tlv->header));
/* convert Dword into bytes */
tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
if ((i + sizeof(*tlv) + tlv_len) > data_len) {
ath11k_warn(ab, "failed to parse spectral tlv payload at bytes %d tlv_len:%d data_len:%d\n",
i, tlv_len, data_len);
ret = -EINVAL;
goto err;
}
tag = FIELD_GET(SPECTRAL_TLV_HDR_TAG,
__le32_to_cpu(tlv->header));
switch (tag) {
case ATH11K_SPECTRAL_TAG_SCAN_SUMMARY:
/* HW bug in tlv length of summary report,
* HW report 3 DWORD size but the data payload
* is 4 DWORD size (16 bytes).
* Need to remove this workaround once HW bug fixed
*/
tlv_len = sizeof(*summary) - sizeof(*tlv) +
ab->hw_params.spectral.summary_pad_sz;
if (tlv_len < (sizeof(*summary) - sizeof(*tlv))) {
ath11k_warn(ab, "failed to parse spectral summary at bytes %d tlv_len:%d\n",
i, tlv_len);
ret = -EINVAL;
goto err;
}
ret = ath11k_dbring_validate_buffer(ar, data, tlv_len);
if (ret) {
ath11k_warn(ar->ab, "found magic value in spectral summary, dropping\n");
goto err;
}
summary = (struct spectral_summary_fft_report *)tlv;
ath11k_spectral_pull_summary(ar, &param->meta,
summary, &summ_rpt);
break;
case ATH11K_SPECTRAL_TAG_SCAN_SEARCH:
if (tlv_len < (sizeof(struct spectral_search_fft_report) -
sizeof(*tlv))) {
ath11k_warn(ab, "failed to parse spectral search fft at bytes %d\n",
i);
ret = -EINVAL;
goto err;
}
memset(fft_sample, 0, sample_sz);
ret = ath11k_spectral_process_fft(ar, &summ_rpt, tlv,
fft_sample,
data_len - i);
if (ret) {
ath11k_warn(ab, "failed to process spectral fft at bytes %d\n",
i);
goto err;
}
quit = true;
break;
}
i += sizeof(*tlv) + tlv_len;
}
ret = 0;
err:
kfree(fft_sample);
unlock:
spin_unlock_bh(&ar->spectral.lock);
return ret;
}
static int ath11k_spectral_ring_alloc(struct ath11k *ar,
struct ath11k_dbring_cap *db_cap)
{
struct ath11k_spectral *sp = &ar->spectral;
int ret;
ret = ath11k_dbring_srng_setup(ar, &sp->rx_ring,
0, db_cap->min_elem);
if (ret) {
ath11k_warn(ar->ab, "failed to setup db ring\n");
return ret;
}
ath11k_dbring_set_cfg(ar, &sp->rx_ring,
ATH11K_SPECTRAL_NUM_RESP_PER_EVENT,
ATH11K_SPECTRAL_EVENT_TIMEOUT_MS,
ath11k_spectral_process_data);
ret = ath11k_dbring_buf_setup(ar, &sp->rx_ring, db_cap);
if (ret) {
ath11k_warn(ar->ab, "failed to setup db ring buffer\n");
goto srng_cleanup;
}
ret = ath11k_dbring_wmi_cfg_setup(ar, &sp->rx_ring,
WMI_DIRECT_BUF_SPECTRAL);
if (ret) {
ath11k_warn(ar->ab, "failed to setup db ring cfg\n");
goto buffer_cleanup;
}
return 0;
buffer_cleanup:
ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
srng_cleanup:
ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
return ret;
}
static inline void ath11k_spectral_ring_free(struct ath11k *ar)
{
struct ath11k_spectral *sp = &ar->spectral;
ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
}
static inline void ath11k_spectral_debug_unregister(struct ath11k *ar)
{
debugfs_remove(ar->spectral.scan_bins);
ar->spectral.scan_bins = NULL;
debugfs_remove(ar->spectral.scan_count);
ar->spectral.scan_count = NULL;
debugfs_remove(ar->spectral.scan_ctl);
ar->spectral.scan_ctl = NULL;
if (ar->spectral.rfs_scan) {
relay_close(ar->spectral.rfs_scan);
ar->spectral.rfs_scan = NULL;
}
}
int ath11k_spectral_vif_stop(struct ath11k_vif *arvif)
{
if (!arvif->spectral_enabled)
return 0;
return ath11k_spectral_scan_config(arvif->ar, ATH11K_SPECTRAL_DISABLED);
}
void ath11k_spectral_reset_buffer(struct ath11k *ar)
{
if (!ar->spectral.enabled)
return;
if (ar->spectral.rfs_scan)
relay_reset(ar->spectral.rfs_scan);
}
void ath11k_spectral_deinit(struct ath11k_base *ab)
{
struct ath11k *ar;
struct ath11k_spectral *sp;
int i;
for (i = 0; i < ab->num_radios; i++) {
ar = ab->pdevs[i].ar;
sp = &ar->spectral;
if (!sp->enabled)
continue;
mutex_lock(&ar->conf_mutex);
ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
mutex_unlock(&ar->conf_mutex);
spin_lock_bh(&sp->lock);
sp->enabled = false;
spin_unlock_bh(&sp->lock);
ath11k_spectral_debug_unregister(ar);
ath11k_spectral_ring_free(ar);
}
}
static inline int ath11k_spectral_debug_register(struct ath11k *ar)
{
int ret;
ar->spectral.rfs_scan = relay_open("spectral_scan",
ar->debug.debugfs_pdev,
ATH11K_SPECTRAL_SUB_BUFF_SIZE(ar->ab),
ATH11K_SPECTRAL_NUM_SUB_BUF,
&rfs_scan_cb, NULL);
if (!ar->spectral.rfs_scan) {
ath11k_warn(ar->ab, "failed to open relay in pdev %d\n",
ar->pdev_idx);
return -EINVAL;
}
ar->spectral.scan_ctl = debugfs_create_file("spectral_scan_ctl",
0600,
ar->debug.debugfs_pdev, ar,
&fops_scan_ctl);
if (!ar->spectral.scan_ctl) {
ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
ar->pdev_idx);
ret = -EINVAL;
goto debug_unregister;
}
ar->spectral.scan_count = debugfs_create_file("spectral_count",
0600,
ar->debug.debugfs_pdev, ar,
&fops_scan_count);
if (!ar->spectral.scan_count) {
ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
ar->pdev_idx);
ret = -EINVAL;
goto debug_unregister;
}
ar->spectral.scan_bins = debugfs_create_file("spectral_bins",
0600,
ar->debug.debugfs_pdev, ar,
&fops_scan_bins);
if (!ar->spectral.scan_bins) {
ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
ar->pdev_idx);
ret = -EINVAL;
goto debug_unregister;
}
return 0;
debug_unregister:
ath11k_spectral_debug_unregister(ar);
return ret;
}
int ath11k_spectral_init(struct ath11k_base *ab)
{
struct ath11k *ar;
struct ath11k_spectral *sp;
struct ath11k_dbring_cap db_cap;
int ret;
int i;
if (!test_bit(WMI_TLV_SERVICE_FREQINFO_IN_METADATA,
ab->wmi_ab.svc_map))
return 0;
if (!ab->hw_params.spectral.fft_sz)
return 0;
for (i = 0; i < ab->num_radios; i++) {
ar = ab->pdevs[i].ar;
sp = &ar->spectral;
ret = ath11k_dbring_get_cap(ar->ab, ar->pdev_idx,
WMI_DIRECT_BUF_SPECTRAL,
&db_cap);
if (ret)
continue;
idr_init(&sp->rx_ring.bufs_idr);
spin_lock_init(&sp->rx_ring.idr_lock);
spin_lock_init(&sp->lock);
ret = ath11k_spectral_ring_alloc(ar, &db_cap);
if (ret) {
ath11k_warn(ab, "failed to init spectral ring for pdev %d\n",
i);
goto deinit;
}
spin_lock_bh(&sp->lock);
sp->mode = ATH11K_SPECTRAL_DISABLED;
sp->count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
sp->fft_size = ATH11K_WMI_SPECTRAL_FFT_SIZE_DEFAULT;
sp->enabled = true;
spin_unlock_bh(&sp->lock);
ret = ath11k_spectral_debug_register(ar);
if (ret) {
ath11k_warn(ab, "failed to register spectral for pdev %d\n",
i);
goto deinit;
}
}
return 0;
deinit:
ath11k_spectral_deinit(ab);
return ret;
}
enum ath11k_spectral_mode ath11k_spectral_get_mode(struct ath11k *ar)
{
if (ar->spectral.enabled)
return ar->spectral.mode;
else
return ATH11K_SPECTRAL_DISABLED;
}
struct ath11k_dbring *ath11k_spectral_get_dbring(struct ath11k *ar)
{
if (ar->spectral.enabled)
return &ar->spectral.rx_ring;
else
return NULL;
}
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