--- /dev/null
+/*
+ * 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(s8 max_index, u16 max_magnitude, size_t bin_len,
+ u8 *data)
+{
+ 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 (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;
+}
+
+int ath10k_spectral_process_fft(struct ath10k *ar,
+ const struct wmi_phyerr *phyerr,
+ const struct phyerr_fft_report *fftr,
+ size_t bin_len, u64 tsf)
+{
+ struct fft_sample_ath10k *fft_sample;
+ u8 buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS];
+ u16 freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag;
+ u32 reg0, reg1;
+ u8 chain_idx, *bins;
+ int dc_pos;
+
+ fft_sample = (struct fft_sample_ath10k *)&buf;
+
+ if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS)
+ return -EINVAL;
+
+ reg0 = __le32_to_cpu(fftr->reg0);
+ reg1 = __le32_to_cpu(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
+ * configuaritions (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 smaples 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 = __le16_to_cpu(phyerr->freq1);
+ freq2 = __le16_to_cpu(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(
+ __le16_to_cpu(phyerr->nf_chains[chain_idx]));
+
+ bins = (u8 *)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;
+
+ 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 ath10k_spectral_scan_trigger(struct ath10k *ar)
+{
+ struct ath10k_vif *arvif;
+ int res;
+ int vdev_id;
+
+ lockdep_assert_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;
+
+ lockdep_assert_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(ar, "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(u8, 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(ar, "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 = "";
+ unsigned int len;
+ enum ath10k_spectral_mode spectral_mode;
+
+ mutex_lock(&ar->conf_mutex);
+ spectral_mode = ar->spectral.mode;
+ mutex_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';
+
+ mutex_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(ar, "failed to reconfigure spectral scan: %d\n",
+ res);
+ }
+ res = ath10k_spectral_scan_trigger(ar);
+ if (res < 0) {
+ ath10k_warn(ar, "failed to trigger spectral scan: %d\n",
+ res);
+ }
+ } else {
+ res = -EINVAL;
+ }
+ } else if (strncmp("background", buf, 9) == 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;
+ }
+
+ 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];
+ unsigned int 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 < 0 || 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 len, bins, fft_size, bin_scale;
+
+ 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);
+ *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;
+
+ 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)
+{
+ ar->spectral.rfs_chan_spec_scan = relay_open("spectral_scan",
+ ar->debug.debugfs_phy,
+ 1024, 256,
+ &rfs_spec_scan_cb, NULL);
+ debugfs_create_file("spectral_scan_ctl",
+ S_IRUSR | S_IWUSR,
+ ar->debug.debugfs_phy, ar,
+ &fops_spec_scan_ctl);
+ debugfs_create_file("spectral_count",
+ S_IRUSR | S_IWUSR,
+ ar->debug.debugfs_phy, ar,
+ &fops_spectral_count);
+ debugfs_create_file("spectral_bins",
+ S_IRUSR | S_IWUSR,
+ 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;
+ }
+}
Code Review / kvmfornfv.git / blobdiff