| /* |
| * Copyright (c) 2013 Qualcomm Atheros, Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #include <linux/relay.h> |
| |
| #include "core.h" |
| #include "debug.h" |
| #include "wmi-ops.h" |
| |
| static void send_fft_sample(struct ath10k* ar, const struct fft_sample_tlv* fft_sample_tlv) { |
| int length; |
| |
| if (!ar->spectral.rfs_chan_spec_scan) { return; } |
| |
| length = __be16_to_cpu(fft_sample_tlv->length) + sizeof(*fft_sample_tlv); |
| relay_write(ar->spectral.rfs_chan_spec_scan, fft_sample_tlv, length); |
| } |
| |
| static uint8_t get_max_exp(int8_t max_index, uint16_t max_magnitude, size_t bin_len, |
| uint8_t* data) { |
| int dc_pos; |
| uint8_t 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 (data[dc_pos + max_index] == (max_magnitude >> max_exp)) { break; } |
| } |
| |
| /* max_exp not found */ |
| if (data[dc_pos + max_index] != (max_magnitude >> max_exp)) { return 0; } |
| |
| return max_exp; |
| } |
| |
| static inline size_t ath10k_spectral_fix_bin_size(struct ath10k* ar, size_t bin_len) { |
| /* some chipsets reports bin size as 2^n bytes + 'm' bytes in |
| * report mode 2. First 2^n bytes carries inband tones and last |
| * 'm' bytes carries band edge detection data mainly used in |
| * radar detection purpose. Strip last 'm' bytes to make bin size |
| * as a valid one. 'm' can take possible values of 4, 12. |
| */ |
| if (!IS_POW2(bin_len)) { bin_len -= ar->hw_params.spectral_bin_discard; } |
| |
| return bin_len; |
| } |
| |
| int ath10k_spectral_process_fft(struct ath10k* ar, struct wmi_phyerr_ev_arg* phyerr, |
| const struct phyerr_fft_report* fftr, size_t bin_len, |
| uint64_t tsf) { |
| struct fft_sample_ath10k* fft_sample; |
| uint8_t buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS]; |
| uint16_t freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag; |
| uint32_t reg0, reg1; |
| uint8_t chain_idx, *bins; |
| int dc_pos; |
| |
| fft_sample = (struct fft_sample_ath10k*)&buf; |
| |
| bin_len = ath10k_spectral_fix_bin_size(ar, bin_len); |
| |
| if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS) { return -EINVAL; } |
| |
| reg0 = fftr->reg0; |
| reg1 = fftr->reg1; |
| |
| length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + bin_len; |
| fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH10K; |
| fft_sample->tlv.length = __cpu_to_be16(length); |
| |
| /* TODO: there might be a reason why the hardware reports 20/40/80 MHz, |
| * but the results/plots suggest that its actually 22/44/88 MHz. |
| */ |
| switch (phyerr->chan_width_mhz) { |
| case 20: |
| fft_sample->chan_width_mhz = 22; |
| break; |
| case 40: |
| fft_sample->chan_width_mhz = 44; |
| break; |
| case 80: |
| /* TODO: As experiments with an analogue sender and various |
| * configurations (fft-sizes of 64/128/256 and 20/40/80 Mhz) |
| * show, the particular configuration of 80 MHz/64 bins does |
| * not match with the other samples at all. Until the reason |
| * for that is found, don't report these samples. |
| */ |
| if (bin_len == 64) { return -EINVAL; } |
| fft_sample->chan_width_mhz = 88; |
| break; |
| default: |
| fft_sample->chan_width_mhz = phyerr->chan_width_mhz; |
| } |
| |
| fft_sample->relpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_RELPWR_DB); |
| fft_sample->avgpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_AVGPWR_DB); |
| |
| peak_mag = MS(reg1, SEARCH_FFT_REPORT_REG1_PEAK_MAG); |
| fft_sample->max_magnitude = __cpu_to_be16(peak_mag); |
| fft_sample->max_index = MS(reg0, SEARCH_FFT_REPORT_REG0_PEAK_SIDX); |
| fft_sample->rssi = phyerr->rssi_combined; |
| |
| total_gain_db = MS(reg0, SEARCH_FFT_REPORT_REG0_TOTAL_GAIN_DB); |
| base_pwr_db = MS(reg0, SEARCH_FFT_REPORT_REG0_BASE_PWR_DB); |
| fft_sample->total_gain_db = __cpu_to_be16(total_gain_db); |
| fft_sample->base_pwr_db = __cpu_to_be16(base_pwr_db); |
| |
| freq1 = phyerr->freq1; |
| freq2 = phyerr->freq2; |
| fft_sample->freq1 = __cpu_to_be16(freq1); |
| fft_sample->freq2 = __cpu_to_be16(freq2); |
| |
| chain_idx = MS(reg0, SEARCH_FFT_REPORT_REG0_FFT_CHN_IDX); |
| |
| fft_sample->noise = __cpu_to_be16(phyerr->nf_chains[chain_idx]); |
| |
| bins = (uint8_t*)fftr; |
| bins += sizeof(*fftr); |
| |
| fft_sample->tsf = __cpu_to_be64(tsf); |
| |
| /* max_exp has been directly reported by previous hardware (ath9k), |
| * maybe its possible to get it by other means? |
| */ |
| fft_sample->max_exp = get_max_exp(fft_sample->max_index, peak_mag, bin_len, bins); |
| |
| memcpy(fft_sample->data, bins, bin_len); |
| |
| /* DC value (value in the middle) is the blind spot of the spectral |
| * sample and invalid, interpolate it. |
| */ |
| dc_pos = bin_len / 2; |
| fft_sample->data[dc_pos] = (fft_sample->data[dc_pos + 1] + fft_sample->data[dc_pos - 1]) / 2; |
| |
| send_fft_sample(ar, &fft_sample->tlv); |
| |
| return 0; |
| } |
| |
| static struct ath10k_vif* ath10k_get_spectral_vdev(struct ath10k* ar) { |
| struct ath10k_vif* arvif; |
| |
| ASSERT_MTX_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 ath10k_spectral_scan_trigger(struct ath10k* ar) { |
| struct ath10k_vif* arvif; |
| int res; |
| int vdev_id; |
| |
| ASSERT_MTX_HELD(&ar->conf_mutex); |
| |
| arvif = ath10k_get_spectral_vdev(ar); |
| if (!arvif) { return -ENODEV; } |
| vdev_id = arvif->vdev_id; |
| |
| if (ar->spectral.mode == SPECTRAL_DISABLED) { return 0; } |
| |
| res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, WMI_SPECTRAL_TRIGGER_CMD_CLEAR, |
| WMI_SPECTRAL_ENABLE_CMD_ENABLE); |
| if (res < 0) { return res; } |
| |
| res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, WMI_SPECTRAL_TRIGGER_CMD_TRIGGER, |
| WMI_SPECTRAL_ENABLE_CMD_ENABLE); |
| if (res < 0) { return res; } |
| |
| return 0; |
| } |
| |
| static int ath10k_spectral_scan_config(struct ath10k* ar, enum ath10k_spectral_mode mode) { |
| struct wmi_vdev_spectral_conf_arg arg; |
| struct ath10k_vif* arvif; |
| int vdev_id, count, res = 0; |
| |
| ASSERT_MTX_HELD(&ar->conf_mutex); |
| |
| arvif = ath10k_get_spectral_vdev(ar); |
| if (!arvif) { return -ENODEV; } |
| |
| vdev_id = arvif->vdev_id; |
| |
| arvif->spectral_enabled = (mode != SPECTRAL_DISABLED); |
| ar->spectral.mode = mode; |
| |
| res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, WMI_SPECTRAL_TRIGGER_CMD_CLEAR, |
| WMI_SPECTRAL_ENABLE_CMD_DISABLE); |
| if (res < 0) { |
| ath10k_warn("failed to enable spectral scan: %d\n", res); |
| return res; |
| } |
| |
| if (mode == SPECTRAL_DISABLED) { return 0; } |
| |
| if (mode == SPECTRAL_BACKGROUND) { |
| count = WMI_SPECTRAL_COUNT_DEFAULT; |
| } else { |
| count = max_t(uint8_t, 1, ar->spectral.config.count); |
| } |
| |
| arg.vdev_id = vdev_id; |
| arg.scan_count = count; |
| arg.scan_period = WMI_SPECTRAL_PERIOD_DEFAULT; |
| arg.scan_priority = WMI_SPECTRAL_PRIORITY_DEFAULT; |
| arg.scan_fft_size = ar->spectral.config.fft_size; |
| arg.scan_gc_ena = WMI_SPECTRAL_GC_ENA_DEFAULT; |
| arg.scan_restart_ena = WMI_SPECTRAL_RESTART_ENA_DEFAULT; |
| arg.scan_noise_floor_ref = WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT; |
| arg.scan_init_delay = WMI_SPECTRAL_INIT_DELAY_DEFAULT; |
| arg.scan_nb_tone_thr = WMI_SPECTRAL_NB_TONE_THR_DEFAULT; |
| arg.scan_str_bin_thr = WMI_SPECTRAL_STR_BIN_THR_DEFAULT; |
| arg.scan_wb_rpt_mode = WMI_SPECTRAL_WB_RPT_MODE_DEFAULT; |
| arg.scan_rssi_rpt_mode = WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT; |
| arg.scan_rssi_thr = WMI_SPECTRAL_RSSI_THR_DEFAULT; |
| arg.scan_pwr_format = WMI_SPECTRAL_PWR_FORMAT_DEFAULT; |
| arg.scan_rpt_mode = WMI_SPECTRAL_RPT_MODE_DEFAULT; |
| arg.scan_bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT; |
| arg.scan_dbm_adj = WMI_SPECTRAL_DBM_ADJ_DEFAULT; |
| arg.scan_chn_mask = WMI_SPECTRAL_CHN_MASK_DEFAULT; |
| |
| res = ath10k_wmi_vdev_spectral_conf(ar, &arg); |
| if (res < 0) { |
| ath10k_warn("failed to configure spectral scan: %d\n", res); |
| return res; |
| } |
| |
| return 0; |
| } |
| |
| static ssize_t read_file_spec_scan_ctl(struct file* file, char __user* user_buf, size_t count, |
| loff_t* ppos) { |
| struct ath10k* ar = file->private_data; |
| char* mode = ""; |
| size_t len; |
| enum ath10k_spectral_mode spectral_mode; |
| |
| mtx_lock(&ar->conf_mutex); |
| spectral_mode = ar->spectral.mode; |
| mtx_unlock(&ar->conf_mutex); |
| |
| switch (spectral_mode) { |
| case SPECTRAL_DISABLED: |
| mode = "disable"; |
| break; |
| case SPECTRAL_BACKGROUND: |
| mode = "background"; |
| break; |
| case SPECTRAL_MANUAL: |
| mode = "manual"; |
| break; |
| } |
| |
| len = strlen(mode); |
| return simple_read_from_buffer(user_buf, count, ppos, mode, len); |
| } |
| |
| static ssize_t write_file_spec_scan_ctl(struct file* file, const char __user* user_buf, |
| size_t count, loff_t* ppos) { |
| struct ath10k* ar = file->private_data; |
| char buf[32]; |
| ssize_t len; |
| int res; |
| |
| len = MIN(count, sizeof(buf) - 1); |
| if (copy_from_user(buf, user_buf, len)) { return -EFAULT; } |
| |
| buf[len] = '\0'; |
| |
| mtx_lock(&ar->conf_mutex); |
| |
| if (strncmp("trigger", buf, 7) == 0) { |
| if (ar->spectral.mode == SPECTRAL_MANUAL || ar->spectral.mode == SPECTRAL_BACKGROUND) { |
| /* reset the configuration to adopt possibly changed |
| * debugfs parameters |
| */ |
| res = ath10k_spectral_scan_config(ar, ar->spectral.mode); |
| if (res < 0) { ath10k_warn("failed to reconfigure spectral scan: %d\n", res); } |
| res = ath10k_spectral_scan_trigger(ar); |
| if (res < 0) { ath10k_warn("failed to trigger spectral scan: %d\n", res); } |
| } else { |
| res = -EINVAL; |
| } |
| } else if (strncmp("background", buf, 10) == 0) { |
| res = ath10k_spectral_scan_config(ar, SPECTRAL_BACKGROUND); |
| } else if (strncmp("manual", buf, 6) == 0) { |
| res = ath10k_spectral_scan_config(ar, SPECTRAL_MANUAL); |
| } else if (strncmp("disable", buf, 7) == 0) { |
| res = ath10k_spectral_scan_config(ar, SPECTRAL_DISABLED); |
| } else { |
| res = -EINVAL; |
| } |
| |
| mtx_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; |
| uint8_t spectral_count; |
| |
| mtx_lock(&ar->conf_mutex); |
| spectral_count = ar->spectral.config.count; |
| mtx_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 < 0 || val > 255) { return -EINVAL; } |
| |
| mtx_lock(&ar->conf_mutex); |
| ar->spectral.config.count = val; |
| mtx_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; |
| |
| mtx_lock(&ar->conf_mutex); |
| |
| fft_size = ar->spectral.config.fft_size; |
| bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT; |
| bins = 1 << (fft_size - bin_scale); |
| |
| mtx_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_POW2(val)) { return -EINVAL; } |
| |
| mtx_lock(&ar->conf_mutex); |
| ar->spectral.config.fft_size = LOG2(val); |
| ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT; |
| mtx_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); |
| *is_global = 1; |
| return buf_file; |
| } |
| |
| static int remove_buf_file_handler(struct dentry* dentry) { |
| debugfs_remove(dentry); |
| |
| return 0; |
| } |
| |
| static 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; |
| |
| ASSERT_MTX_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; |
| } |
| } |