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560 lines
14 KiB
560 lines
14 KiB
// 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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|
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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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|
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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); |
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} else { |
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res = -EINVAL; |
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} |
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mutex_unlock(&ar->conf_mutex); |
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if (res < 0) |
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return res; |
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return count; |
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} |
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static const struct file_operations fops_spec_scan_ctl = { |
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.read = read_file_spec_scan_ctl, |
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.write = write_file_spec_scan_ctl, |
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.open = simple_open, |
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.owner = THIS_MODULE, |
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.llseek = default_llseek, |
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}; |
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static ssize_t read_file_spectral_count(struct file *file, |
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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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size_t len; |
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u8 spectral_count; |
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mutex_lock(&ar->conf_mutex); |
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spectral_count = ar->spectral.config.count; |
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mutex_unlock(&ar->conf_mutex); |
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len = sprintf(buf, "%d\n", spectral_count); |
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return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
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} |
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static ssize_t write_file_spectral_count(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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unsigned long val; |
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char buf[32]; |
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ssize_t len; |
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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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if (kstrtoul(buf, 0, &val)) |
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return -EINVAL; |
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if (val > 255) |
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return -EINVAL; |
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mutex_lock(&ar->conf_mutex); |
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ar->spectral.config.count = val; |
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mutex_unlock(&ar->conf_mutex); |
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return count; |
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} |
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static const struct file_operations fops_spectral_count = { |
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.read = read_file_spectral_count, |
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.write = write_file_spectral_count, |
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.open = simple_open, |
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.owner = THIS_MODULE, |
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.llseek = default_llseek, |
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}; |
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static ssize_t read_file_spectral_bins(struct file *file, |
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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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unsigned int bins, fft_size, bin_scale; |
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size_t len; |
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mutex_lock(&ar->conf_mutex); |
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fft_size = ar->spectral.config.fft_size; |
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bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT; |
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bins = 1 << (fft_size - bin_scale); |
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mutex_unlock(&ar->conf_mutex); |
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len = sprintf(buf, "%d\n", bins); |
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return simple_read_from_buffer(user_buf, count, ppos, buf, len); |
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} |
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static ssize_t write_file_spectral_bins(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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unsigned long val; |
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char buf[32]; |
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ssize_t len; |
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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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if (kstrtoul(buf, 0, &val)) |
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return -EINVAL; |
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if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS) |
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return -EINVAL; |
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if (!is_power_of_2(val)) |
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return -EINVAL; |
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mutex_lock(&ar->conf_mutex); |
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ar->spectral.config.fft_size = ilog2(val); |
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ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT; |
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mutex_unlock(&ar->conf_mutex); |
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return count; |
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} |
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static const struct file_operations fops_spectral_bins = { |
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.read = read_file_spectral_bins, |
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.write = write_file_spectral_bins, |
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.open = simple_open, |
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.owner = THIS_MODULE, |
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.llseek = default_llseek, |
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}; |
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|
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static struct dentry *create_buf_file_handler(const char *filename, |
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struct dentry *parent, |
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umode_t mode, |
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struct rchan_buf *buf, |
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int *is_global) |
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{ |
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struct dentry *buf_file; |
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buf_file = debugfs_create_file(filename, mode, parent, buf, |
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&relay_file_operations); |
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if (IS_ERR(buf_file)) |
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return NULL; |
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*is_global = 1; |
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return buf_file; |
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} |
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static int remove_buf_file_handler(struct dentry *dentry) |
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{ |
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debugfs_remove(dentry); |
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return 0; |
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} |
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static const struct rchan_callbacks rfs_spec_scan_cb = { |
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.create_buf_file = create_buf_file_handler, |
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.remove_buf_file = remove_buf_file_handler, |
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}; |
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int ath10k_spectral_start(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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list_for_each_entry(arvif, &ar->arvifs, list) |
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arvif->spectral_enabled = 0; |
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ar->spectral.mode = SPECTRAL_DISABLED; |
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ar->spectral.config.count = WMI_SPECTRAL_COUNT_DEFAULT; |
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ar->spectral.config.fft_size = WMI_SPECTRAL_FFT_SIZE_DEFAULT; |
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return 0; |
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} |
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int ath10k_spectral_vif_stop(struct ath10k_vif *arvif) |
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{ |
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if (!arvif->spectral_enabled) |
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return 0; |
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return ath10k_spectral_scan_config(arvif->ar, SPECTRAL_DISABLED); |
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} |
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|
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int ath10k_spectral_create(struct ath10k *ar) |
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{ |
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/* The buffer size covers whole channels in dual bands up to 128 bins. |
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* Scan with bigger than 128 bins needs to be run on single band each. |
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*/ |
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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; |
|
} |
|
}
|
|
|