561 lines
14 KiB
C
561 lines
14 KiB
C
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// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2013-2017 Qualcomm Atheros, Inc.
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*/
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#include <linux/relay.h>
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#include "core.h"
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#include "debug.h"
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#include "wmi-ops.h"
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static void send_fft_sample(struct ath10k *ar,
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const struct fft_sample_tlv *fft_sample_tlv)
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{
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int length;
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if (!ar->spectral.rfs_chan_spec_scan)
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return;
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length = __be16_to_cpu(fft_sample_tlv->length) +
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sizeof(*fft_sample_tlv);
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relay_write(ar->spectral.rfs_chan_spec_scan, fft_sample_tlv, length);
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}
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static uint8_t get_max_exp(s8 max_index, u16 max_magnitude, size_t bin_len,
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u8 *data)
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{
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int dc_pos;
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u8 max_exp;
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dc_pos = bin_len / 2;
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/* peak index outside of bins */
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if (dc_pos < max_index || -dc_pos >= max_index)
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return 0;
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for (max_exp = 0; max_exp < 8; max_exp++) {
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if (data[dc_pos + max_index] == (max_magnitude >> max_exp))
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break;
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}
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/* max_exp not found */
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if (data[dc_pos + max_index] != (max_magnitude >> max_exp))
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return 0;
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return max_exp;
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}
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static inline size_t ath10k_spectral_fix_bin_size(struct ath10k *ar,
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size_t bin_len)
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{
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/* some chipsets reports bin size as 2^n bytes + 'm' bytes in
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* report mode 2. First 2^n bytes carries inband tones and last
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* 'm' bytes carries band edge detection data mainly used in
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* radar detection purpose. Strip last 'm' bytes to make bin size
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* as a valid one. 'm' can take possible values of 4, 12.
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*/
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if (!is_power_of_2(bin_len))
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bin_len -= ar->hw_params.spectral_bin_discard;
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return bin_len;
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}
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int ath10k_spectral_process_fft(struct ath10k *ar,
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struct wmi_phyerr_ev_arg *phyerr,
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const struct phyerr_fft_report *fftr,
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size_t bin_len, u64 tsf)
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{
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struct fft_sample_ath10k *fft_sample;
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u8 buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS];
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u16 freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag;
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u32 reg0, reg1;
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u8 chain_idx, *bins;
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int dc_pos;
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fft_sample = (struct fft_sample_ath10k *)&buf;
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bin_len = ath10k_spectral_fix_bin_size(ar, bin_len);
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if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS)
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return -EINVAL;
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reg0 = __le32_to_cpu(fftr->reg0);
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reg1 = __le32_to_cpu(fftr->reg1);
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length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + bin_len;
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fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH10K;
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fft_sample->tlv.length = __cpu_to_be16(length);
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/* TODO: there might be a reason why the hardware reports 20/40/80 MHz,
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* but the results/plots suggest that its actually 22/44/88 MHz.
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*/
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switch (phyerr->chan_width_mhz) {
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case 20:
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fft_sample->chan_width_mhz = 22;
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break;
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case 40:
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fft_sample->chan_width_mhz = 44;
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break;
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case 80:
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/* TODO: As experiments with an analogue sender and various
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* configurations (fft-sizes of 64/128/256 and 20/40/80 Mhz)
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* show, the particular configuration of 80 MHz/64 bins does
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* not match with the other samples at all. Until the reason
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* for that is found, don't report these samples.
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*/
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if (bin_len == 64)
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return -EINVAL;
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fft_sample->chan_width_mhz = 88;
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break;
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default:
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fft_sample->chan_width_mhz = phyerr->chan_width_mhz;
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}
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fft_sample->relpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_RELPWR_DB);
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fft_sample->avgpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_AVGPWR_DB);
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peak_mag = MS(reg1, SEARCH_FFT_REPORT_REG1_PEAK_MAG);
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fft_sample->max_magnitude = __cpu_to_be16(peak_mag);
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fft_sample->max_index = MS(reg0, SEARCH_FFT_REPORT_REG0_PEAK_SIDX);
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fft_sample->rssi = phyerr->rssi_combined;
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total_gain_db = MS(reg0, SEARCH_FFT_REPORT_REG0_TOTAL_GAIN_DB);
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base_pwr_db = MS(reg0, SEARCH_FFT_REPORT_REG0_BASE_PWR_DB);
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fft_sample->total_gain_db = __cpu_to_be16(total_gain_db);
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fft_sample->base_pwr_db = __cpu_to_be16(base_pwr_db);
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freq1 = phyerr->freq1;
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freq2 = phyerr->freq2;
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fft_sample->freq1 = __cpu_to_be16(freq1);
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fft_sample->freq2 = __cpu_to_be16(freq2);
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chain_idx = MS(reg0, SEARCH_FFT_REPORT_REG0_FFT_CHN_IDX);
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fft_sample->noise = __cpu_to_be16(phyerr->nf_chains[chain_idx]);
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bins = (u8 *)fftr;
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bins += sizeof(*fftr) + ar->hw_params.spectral_bin_offset;
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fft_sample->tsf = __cpu_to_be64(tsf);
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/* max_exp has been directly reported by previous hardware (ath9k),
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* maybe its possible to get it by other means?
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*/
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fft_sample->max_exp = get_max_exp(fft_sample->max_index, peak_mag,
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bin_len, bins);
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memcpy(fft_sample->data, bins, bin_len);
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/* DC value (value in the middle) is the blind spot of the spectral
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* sample and invalid, interpolate it.
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*/
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dc_pos = bin_len / 2;
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fft_sample->data[dc_pos] = (fft_sample->data[dc_pos + 1] +
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fft_sample->data[dc_pos - 1]) / 2;
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send_fft_sample(ar, &fft_sample->tlv);
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return 0;
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}
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static struct ath10k_vif *ath10k_get_spectral_vdev(struct ath10k *ar)
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{
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struct ath10k_vif *arvif;
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lockdep_assert_held(&ar->conf_mutex);
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if (list_empty(&ar->arvifs))
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return NULL;
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/* if there already is a vif doing spectral, return that. */
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list_for_each_entry(arvif, &ar->arvifs, list)
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if (arvif->spectral_enabled)
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return arvif;
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/* otherwise, return the first vif. */
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return list_first_entry(&ar->arvifs, typeof(*arvif), list);
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}
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static int ath10k_spectral_scan_trigger(struct ath10k *ar)
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{
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struct ath10k_vif *arvif;
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int res;
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int vdev_id;
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lockdep_assert_held(&ar->conf_mutex);
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arvif = ath10k_get_spectral_vdev(ar);
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if (!arvif)
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return -ENODEV;
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vdev_id = arvif->vdev_id;
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if (ar->spectral.mode == SPECTRAL_DISABLED)
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return 0;
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res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
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WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
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WMI_SPECTRAL_ENABLE_CMD_ENABLE);
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if (res < 0)
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return res;
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res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
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WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
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WMI_SPECTRAL_ENABLE_CMD_ENABLE);
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if (res < 0)
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return res;
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return 0;
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}
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static int ath10k_spectral_scan_config(struct ath10k *ar,
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enum ath10k_spectral_mode mode)
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{
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struct wmi_vdev_spectral_conf_arg arg;
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struct ath10k_vif *arvif;
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int vdev_id, count, res = 0;
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lockdep_assert_held(&ar->conf_mutex);
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arvif = ath10k_get_spectral_vdev(ar);
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if (!arvif)
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return -ENODEV;
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vdev_id = arvif->vdev_id;
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arvif->spectral_enabled = (mode != SPECTRAL_DISABLED);
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ar->spectral.mode = mode;
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res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
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WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
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WMI_SPECTRAL_ENABLE_CMD_DISABLE);
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if (res < 0) {
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ath10k_warn(ar, "failed to enable spectral scan: %d\n", res);
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return res;
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}
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if (mode == SPECTRAL_DISABLED)
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return 0;
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if (mode == SPECTRAL_BACKGROUND)
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count = WMI_SPECTRAL_COUNT_DEFAULT;
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else
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count = max_t(u8, 1, ar->spectral.config.count);
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arg.vdev_id = vdev_id;
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arg.scan_count = count;
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arg.scan_period = WMI_SPECTRAL_PERIOD_DEFAULT;
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arg.scan_priority = WMI_SPECTRAL_PRIORITY_DEFAULT;
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arg.scan_fft_size = ar->spectral.config.fft_size;
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arg.scan_gc_ena = WMI_SPECTRAL_GC_ENA_DEFAULT;
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arg.scan_restart_ena = WMI_SPECTRAL_RESTART_ENA_DEFAULT;
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arg.scan_noise_floor_ref = WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
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arg.scan_init_delay = WMI_SPECTRAL_INIT_DELAY_DEFAULT;
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arg.scan_nb_tone_thr = WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
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arg.scan_str_bin_thr = WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
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arg.scan_wb_rpt_mode = WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
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arg.scan_rssi_rpt_mode = WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
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arg.scan_rssi_thr = WMI_SPECTRAL_RSSI_THR_DEFAULT;
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arg.scan_pwr_format = WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
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arg.scan_rpt_mode = WMI_SPECTRAL_RPT_MODE_DEFAULT;
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arg.scan_bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
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arg.scan_dbm_adj = WMI_SPECTRAL_DBM_ADJ_DEFAULT;
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arg.scan_chn_mask = WMI_SPECTRAL_CHN_MASK_DEFAULT;
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res = ath10k_wmi_vdev_spectral_conf(ar, &arg);
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if (res < 0) {
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ath10k_warn(ar, "failed to configure spectral scan: %d\n", res);
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return res;
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}
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return 0;
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}
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static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath10k *ar = file->private_data;
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char *mode = "";
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size_t len;
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enum ath10k_spectral_mode spectral_mode;
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mutex_lock(&ar->conf_mutex);
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spectral_mode = ar->spectral.mode;
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mutex_unlock(&ar->conf_mutex);
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switch (spectral_mode) {
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case SPECTRAL_DISABLED:
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mode = "disable";
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break;
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case SPECTRAL_BACKGROUND:
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mode = "background";
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break;
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case SPECTRAL_MANUAL:
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mode = "manual";
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break;
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}
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len = strlen(mode);
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return simple_read_from_buffer(user_buf, count, ppos, mode, len);
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}
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static ssize_t write_file_spec_scan_ctl(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath10k *ar = file->private_data;
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char buf[32];
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ssize_t len;
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int res;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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mutex_lock(&ar->conf_mutex);
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if (strncmp("trigger", buf, 7) == 0) {
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if (ar->spectral.mode == SPECTRAL_MANUAL ||
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ar->spectral.mode == SPECTRAL_BACKGROUND) {
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/* reset the configuration to adopt possibly changed
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* debugfs parameters
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*/
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res = ath10k_spectral_scan_config(ar,
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ar->spectral.mode);
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if (res < 0) {
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ath10k_warn(ar, "failed to reconfigure spectral scan: %d\n",
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res);
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}
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res = ath10k_spectral_scan_trigger(ar);
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if (res < 0) {
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ath10k_warn(ar, "failed to trigger spectral scan: %d\n",
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res);
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}
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} else {
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res = -EINVAL;
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}
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} else if (strncmp("background", buf, 10) == 0) {
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res = ath10k_spectral_scan_config(ar, SPECTRAL_BACKGROUND);
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} else if (strncmp("manual", buf, 6) == 0) {
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res = ath10k_spectral_scan_config(ar, SPECTRAL_MANUAL);
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} else if (strncmp("disable", buf, 7) == 0) {
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res = ath10k_spectral_scan_config(ar, SPECTRAL_DISABLED);
|
||
|
|
} else {
|
||
|
|
res = -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
mutex_unlock(&ar->conf_mutex);
|
||
|
|
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spec_scan_ctl = {
|
||
|
|
.read = read_file_spec_scan_ctl,
|
||
|
|
.write = write_file_spec_scan_ctl,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
static ssize_t read_file_spectral_count(struct file *file,
|
||
|
|
char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath10k *ar = file->private_data;
|
||
|
|
char buf[32];
|
||
|
|
size_t len;
|
||
|
|
u8 spectral_count;
|
||
|
|
|
||
|
|
mutex_lock(&ar->conf_mutex);
|
||
|
|
spectral_count = ar->spectral.config.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 write_file_spectral_count(struct file *file,
|
||
|
|
const char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath10k *ar = file->private_data;
|
||
|
|
unsigned long val;
|
||
|
|
char buf[32];
|
||
|
|
ssize_t len;
|
||
|
|
|
||
|
|
len = min(count, sizeof(buf) - 1);
|
||
|
|
if (copy_from_user(buf, user_buf, len))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
buf[len] = '\0';
|
||
|
|
if (kstrtoul(buf, 0, &val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val > 255)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
mutex_lock(&ar->conf_mutex);
|
||
|
|
ar->spectral.config.count = val;
|
||
|
|
mutex_unlock(&ar->conf_mutex);
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spectral_count = {
|
||
|
|
.read = read_file_spectral_count,
|
||
|
|
.write = write_file_spectral_count,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
static ssize_t read_file_spectral_bins(struct file *file,
|
||
|
|
char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath10k *ar = file->private_data;
|
||
|
|
char buf[32];
|
||
|
|
unsigned int bins, fft_size, bin_scale;
|
||
|
|
size_t len;
|
||
|
|
|
||
|
|
mutex_lock(&ar->conf_mutex);
|
||
|
|
|
||
|
|
fft_size = ar->spectral.config.fft_size;
|
||
|
|
bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
|
||
|
|
bins = 1 << (fft_size - bin_scale);
|
||
|
|
|
||
|
|
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 write_file_spectral_bins(struct file *file,
|
||
|
|
const char __user *user_buf,
|
||
|
|
size_t count, loff_t *ppos)
|
||
|
|
{
|
||
|
|
struct ath10k *ar = file->private_data;
|
||
|
|
unsigned long val;
|
||
|
|
char buf[32];
|
||
|
|
ssize_t len;
|
||
|
|
|
||
|
|
len = min(count, sizeof(buf) - 1);
|
||
|
|
if (copy_from_user(buf, user_buf, len))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
buf[len] = '\0';
|
||
|
|
if (kstrtoul(buf, 0, &val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (!is_power_of_2(val))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
mutex_lock(&ar->conf_mutex);
|
||
|
|
ar->spectral.config.fft_size = ilog2(val);
|
||
|
|
ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT;
|
||
|
|
mutex_unlock(&ar->conf_mutex);
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct file_operations fops_spectral_bins = {
|
||
|
|
.read = read_file_spectral_bins,
|
||
|
|
.write = write_file_spectral_bins,
|
||
|
|
.open = simple_open,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.llseek = default_llseek,
|
||
|
|
};
|
||
|
|
|
||
|
|
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);
|
||
|
|
if (IS_ERR(buf_file))
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
*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_spec_scan_cb = {
|
||
|
|
.create_buf_file = create_buf_file_handler,
|
||
|
|
.remove_buf_file = remove_buf_file_handler,
|
||
|
|
};
|
||
|
|
|
||
|
|
int ath10k_spectral_start(struct ath10k *ar)
|
||
|
|
{
|
||
|
|
struct ath10k_vif *arvif;
|
||
|
|
|
||
|
|
lockdep_assert_held(&ar->conf_mutex);
|
||
|
|
|
||
|
|
list_for_each_entry(arvif, &ar->arvifs, list)
|
||
|
|
arvif->spectral_enabled = 0;
|
||
|
|
|
||
|
|
ar->spectral.mode = SPECTRAL_DISABLED;
|
||
|
|
ar->spectral.config.count = WMI_SPECTRAL_COUNT_DEFAULT;
|
||
|
|
ar->spectral.config.fft_size = WMI_SPECTRAL_FFT_SIZE_DEFAULT;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ath10k_spectral_vif_stop(struct ath10k_vif *arvif)
|
||
|
|
{
|
||
|
|
if (!arvif->spectral_enabled)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return ath10k_spectral_scan_config(arvif->ar, SPECTRAL_DISABLED);
|
||
|
|
}
|
||
|
|
|
||
|
|
int ath10k_spectral_create(struct ath10k *ar)
|
||
|
|
{
|
||
|
|
/* The buffer size covers whole channels in dual bands up to 128 bins.
|
||
|
|
* Scan with bigger than 128 bins needs to be run on single band each.
|
||
|
|
*/
|
||
|
|
ar->spectral.rfs_chan_spec_scan = relay_open("spectral_scan",
|
||
|
|
ar->debug.debugfs_phy,
|
||
|
|
1140, 2500,
|
||
|
|
&rfs_spec_scan_cb, NULL);
|
||
|
|
debugfs_create_file("spectral_scan_ctl",
|
||
|
|
0600,
|
||
|
|
ar->debug.debugfs_phy, ar,
|
||
|
|
&fops_spec_scan_ctl);
|
||
|
|
debugfs_create_file("spectral_count",
|
||
|
|
0600,
|
||
|
|
ar->debug.debugfs_phy, ar,
|
||
|
|
&fops_spectral_count);
|
||
|
|
debugfs_create_file("spectral_bins",
|
||
|
|
0600,
|
||
|
|
ar->debug.debugfs_phy, ar,
|
||
|
|
&fops_spectral_bins);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void ath10k_spectral_destroy(struct ath10k *ar)
|
||
|
|
{
|
||
|
|
if (ar->spectral.rfs_chan_spec_scan) {
|
||
|
|
relay_close(ar->spectral.rfs_chan_spec_scan);
|
||
|
|
ar->spectral.rfs_chan_spec_scan = NULL;
|
||
|
|
}
|
||
|
|
}
|