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17#include <linux/relay.h>
18#include "core.h"
19#include "debug.h"
20#include "wmi-ops.h"
21
22static void send_fft_sample(struct ath10k *ar,
23 const struct fft_sample_tlv *fft_sample_tlv)
24{
25 int length;
26
27 if (!ar->spectral.rfs_chan_spec_scan)
28 return;
29
30 length = __be16_to_cpu(fft_sample_tlv->length) +
31 sizeof(*fft_sample_tlv);
32 relay_write(ar->spectral.rfs_chan_spec_scan, fft_sample_tlv, length);
33}
34
35static uint8_t get_max_exp(s8 max_index, u16 max_magnitude, size_t bin_len,
36 u8 *data)
37{
38 int dc_pos;
39 u8 max_exp;
40
41 dc_pos = bin_len / 2;
42
43
44 if (dc_pos < max_index || -dc_pos >= max_index)
45 return 0;
46
47 for (max_exp = 0; max_exp < 8; max_exp++) {
48 if (data[dc_pos + max_index] == (max_magnitude >> max_exp))
49 break;
50 }
51
52
53 if (data[dc_pos + max_index] != (max_magnitude >> max_exp))
54 return 0;
55
56 return max_exp;
57}
58
59int ath10k_spectral_process_fft(struct ath10k *ar,
60 const struct wmi_phyerr *phyerr,
61 const struct phyerr_fft_report *fftr,
62 size_t bin_len, u64 tsf)
63{
64 struct fft_sample_ath10k *fft_sample;
65 u8 buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS];
66 u16 freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag;
67 u32 reg0, reg1;
68 u8 chain_idx, *bins;
69 int dc_pos;
70
71 fft_sample = (struct fft_sample_ath10k *)&buf;
72
73 if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS)
74 return -EINVAL;
75
76 reg0 = __le32_to_cpu(fftr->reg0);
77 reg1 = __le32_to_cpu(fftr->reg1);
78
79 length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + bin_len;
80 fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH10K;
81 fft_sample->tlv.length = __cpu_to_be16(length);
82
83
84
85
86 switch (phyerr->chan_width_mhz) {
87 case 20:
88 fft_sample->chan_width_mhz = 22;
89 break;
90 case 40:
91 fft_sample->chan_width_mhz = 44;
92 break;
93 case 80:
94
95
96
97
98
99
100 if (bin_len == 64)
101 return -EINVAL;
102 fft_sample->chan_width_mhz = 88;
103 break;
104 default:
105 fft_sample->chan_width_mhz = phyerr->chan_width_mhz;
106 }
107
108 fft_sample->relpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_RELPWR_DB);
109 fft_sample->avgpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_AVGPWR_DB);
110
111 peak_mag = MS(reg1, SEARCH_FFT_REPORT_REG1_PEAK_MAG);
112 fft_sample->max_magnitude = __cpu_to_be16(peak_mag);
113 fft_sample->max_index = MS(reg0, SEARCH_FFT_REPORT_REG0_PEAK_SIDX);
114 fft_sample->rssi = phyerr->rssi_combined;
115
116 total_gain_db = MS(reg0, SEARCH_FFT_REPORT_REG0_TOTAL_GAIN_DB);
117 base_pwr_db = MS(reg0, SEARCH_FFT_REPORT_REG0_BASE_PWR_DB);
118 fft_sample->total_gain_db = __cpu_to_be16(total_gain_db);
119 fft_sample->base_pwr_db = __cpu_to_be16(base_pwr_db);
120
121 freq1 = __le16_to_cpu(phyerr->freq1);
122 freq2 = __le16_to_cpu(phyerr->freq2);
123 fft_sample->freq1 = __cpu_to_be16(freq1);
124 fft_sample->freq2 = __cpu_to_be16(freq2);
125
126 chain_idx = MS(reg0, SEARCH_FFT_REPORT_REG0_FFT_CHN_IDX);
127
128 fft_sample->noise = __cpu_to_be16(
129 __le16_to_cpu(phyerr->nf_chains[chain_idx]));
130
131 bins = (u8 *)fftr;
132 bins += sizeof(*fftr);
133
134 fft_sample->tsf = __cpu_to_be64(tsf);
135
136
137
138
139 fft_sample->max_exp = get_max_exp(fft_sample->max_index, peak_mag,
140 bin_len, bins);
141
142 memcpy(fft_sample->data, bins, bin_len);
143
144
145
146
147 dc_pos = bin_len / 2;
148 fft_sample->data[dc_pos] = (fft_sample->data[dc_pos + 1] +
149 fft_sample->data[dc_pos - 1]) / 2;
150
151 send_fft_sample(ar, &fft_sample->tlv);
152
153 return 0;
154}
155
156static struct ath10k_vif *ath10k_get_spectral_vdev(struct ath10k *ar)
157{
158 struct ath10k_vif *arvif;
159
160 lockdep_assert_held(&ar->conf_mutex);
161
162 if (list_empty(&ar->arvifs))
163 return NULL;
164
165
166 list_for_each_entry(arvif, &ar->arvifs, list)
167 if (arvif->spectral_enabled)
168 return arvif;
169
170
171 return list_first_entry(&ar->arvifs, typeof(*arvif), list);
172}
173
174static int ath10k_spectral_scan_trigger(struct ath10k *ar)
175{
176 struct ath10k_vif *arvif;
177 int res;
178 int vdev_id;
179
180 lockdep_assert_held(&ar->conf_mutex);
181
182 arvif = ath10k_get_spectral_vdev(ar);
183 if (!arvif)
184 return -ENODEV;
185 vdev_id = arvif->vdev_id;
186
187 if (ar->spectral.mode == SPECTRAL_DISABLED)
188 return 0;
189
190 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
191 WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
192 WMI_SPECTRAL_ENABLE_CMD_ENABLE);
193 if (res < 0)
194 return res;
195
196 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
197 WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
198 WMI_SPECTRAL_ENABLE_CMD_ENABLE);
199 if (res < 0)
200 return res;
201
202 return 0;
203}
204
205static int ath10k_spectral_scan_config(struct ath10k *ar,
206 enum ath10k_spectral_mode mode)
207{
208 struct wmi_vdev_spectral_conf_arg arg;
209 struct ath10k_vif *arvif;
210 int vdev_id, count, res = 0;
211
212 lockdep_assert_held(&ar->conf_mutex);
213
214 arvif = ath10k_get_spectral_vdev(ar);
215 if (!arvif)
216 return -ENODEV;
217
218 vdev_id = arvif->vdev_id;
219
220 arvif->spectral_enabled = (mode != SPECTRAL_DISABLED);
221 ar->spectral.mode = mode;
222
223 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
224 WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
225 WMI_SPECTRAL_ENABLE_CMD_DISABLE);
226 if (res < 0) {
227 ath10k_warn(ar, "failed to enable spectral scan: %d\n", res);
228 return res;
229 }
230
231 if (mode == SPECTRAL_DISABLED)
232 return 0;
233
234 if (mode == SPECTRAL_BACKGROUND)
235 count = WMI_SPECTRAL_COUNT_DEFAULT;
236 else
237 count = max_t(u8, 1, ar->spectral.config.count);
238
239 arg.vdev_id = vdev_id;
240 arg.scan_count = count;
241 arg.scan_period = WMI_SPECTRAL_PERIOD_DEFAULT;
242 arg.scan_priority = WMI_SPECTRAL_PRIORITY_DEFAULT;
243 arg.scan_fft_size = ar->spectral.config.fft_size;
244 arg.scan_gc_ena = WMI_SPECTRAL_GC_ENA_DEFAULT;
245 arg.scan_restart_ena = WMI_SPECTRAL_RESTART_ENA_DEFAULT;
246 arg.scan_noise_floor_ref = WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
247 arg.scan_init_delay = WMI_SPECTRAL_INIT_DELAY_DEFAULT;
248 arg.scan_nb_tone_thr = WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
249 arg.scan_str_bin_thr = WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
250 arg.scan_wb_rpt_mode = WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
251 arg.scan_rssi_rpt_mode = WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
252 arg.scan_rssi_thr = WMI_SPECTRAL_RSSI_THR_DEFAULT;
253 arg.scan_pwr_format = WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
254 arg.scan_rpt_mode = WMI_SPECTRAL_RPT_MODE_DEFAULT;
255 arg.scan_bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
256 arg.scan_dbm_adj = WMI_SPECTRAL_DBM_ADJ_DEFAULT;
257 arg.scan_chn_mask = WMI_SPECTRAL_CHN_MASK_DEFAULT;
258
259 res = ath10k_wmi_vdev_spectral_conf(ar, &arg);
260 if (res < 0) {
261 ath10k_warn(ar, "failed to configure spectral scan: %d\n", res);
262 return res;
263 }
264
265 return 0;
266}
267
268static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf,
269 size_t count, loff_t *ppos)
270{
271 struct ath10k *ar = file->private_data;
272 char *mode = "";
273 unsigned int len;
274 enum ath10k_spectral_mode spectral_mode;
275
276 mutex_lock(&ar->conf_mutex);
277 spectral_mode = ar->spectral.mode;
278 mutex_unlock(&ar->conf_mutex);
279
280 switch (spectral_mode) {
281 case SPECTRAL_DISABLED:
282 mode = "disable";
283 break;
284 case SPECTRAL_BACKGROUND:
285 mode = "background";
286 break;
287 case SPECTRAL_MANUAL:
288 mode = "manual";
289 break;
290 }
291
292 len = strlen(mode);
293 return simple_read_from_buffer(user_buf, count, ppos, mode, len);
294}
295
296static ssize_t write_file_spec_scan_ctl(struct file *file,
297 const char __user *user_buf,
298 size_t count, loff_t *ppos)
299{
300 struct ath10k *ar = file->private_data;
301 char buf[32];
302 ssize_t len;
303 int res;
304
305 len = min(count, sizeof(buf) - 1);
306 if (copy_from_user(buf, user_buf, len))
307 return -EFAULT;
308
309 buf[len] = '\0';
310
311 mutex_lock(&ar->conf_mutex);
312
313 if (strncmp("trigger", buf, 7) == 0) {
314 if (ar->spectral.mode == SPECTRAL_MANUAL ||
315 ar->spectral.mode == SPECTRAL_BACKGROUND) {
316
317
318
319 res = ath10k_spectral_scan_config(ar,
320 ar->spectral.mode);
321 if (res < 0) {
322 ath10k_warn(ar, "failed to reconfigure spectral scan: %d\n",
323 res);
324 }
325 res = ath10k_spectral_scan_trigger(ar);
326 if (res < 0) {
327 ath10k_warn(ar, "failed to trigger spectral scan: %d\n",
328 res);
329 }
330 } else {
331 res = -EINVAL;
332 }
333 } else if (strncmp("background", buf, 9) == 0) {
334 res = ath10k_spectral_scan_config(ar, SPECTRAL_BACKGROUND);
335 } else if (strncmp("manual", buf, 6) == 0) {
336 res = ath10k_spectral_scan_config(ar, SPECTRAL_MANUAL);
337 } else if (strncmp("disable", buf, 7) == 0) {
338 res = ath10k_spectral_scan_config(ar, SPECTRAL_DISABLED);
339 } else {
340 res = -EINVAL;
341 }
342
343 mutex_unlock(&ar->conf_mutex);
344
345 if (res < 0)
346 return res;
347
348 return count;
349}
350
351static const struct file_operations fops_spec_scan_ctl = {
352 .read = read_file_spec_scan_ctl,
353 .write = write_file_spec_scan_ctl,
354 .open = simple_open,
355 .owner = THIS_MODULE,
356 .llseek = default_llseek,
357};
358
359static ssize_t read_file_spectral_count(struct file *file,
360 char __user *user_buf,
361 size_t count, loff_t *ppos)
362{
363 struct ath10k *ar = file->private_data;
364 char buf[32];
365 unsigned int len;
366 u8 spectral_count;
367
368 mutex_lock(&ar->conf_mutex);
369 spectral_count = ar->spectral.config.count;
370 mutex_unlock(&ar->conf_mutex);
371
372 len = sprintf(buf, "%d\n", spectral_count);
373 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
374}
375
376static ssize_t write_file_spectral_count(struct file *file,
377 const char __user *user_buf,
378 size_t count, loff_t *ppos)
379{
380 struct ath10k *ar = file->private_data;
381 unsigned long val;
382 char buf[32];
383 ssize_t len;
384
385 len = min(count, sizeof(buf) - 1);
386 if (copy_from_user(buf, user_buf, len))
387 return -EFAULT;
388
389 buf[len] = '\0';
390 if (kstrtoul(buf, 0, &val))
391 return -EINVAL;
392
393 if (val < 0 || val > 255)
394 return -EINVAL;
395
396 mutex_lock(&ar->conf_mutex);
397 ar->spectral.config.count = val;
398 mutex_unlock(&ar->conf_mutex);
399
400 return count;
401}
402
403static const struct file_operations fops_spectral_count = {
404 .read = read_file_spectral_count,
405 .write = write_file_spectral_count,
406 .open = simple_open,
407 .owner = THIS_MODULE,
408 .llseek = default_llseek,
409};
410
411static ssize_t read_file_spectral_bins(struct file *file,
412 char __user *user_buf,
413 size_t count, loff_t *ppos)
414{
415 struct ath10k *ar = file->private_data;
416 char buf[32];
417 unsigned int len, bins, fft_size, bin_scale;
418
419 mutex_lock(&ar->conf_mutex);
420
421 fft_size = ar->spectral.config.fft_size;
422 bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
423 bins = 1 << (fft_size - bin_scale);
424
425 mutex_unlock(&ar->conf_mutex);
426
427 len = sprintf(buf, "%d\n", bins);
428 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
429}
430
431static ssize_t write_file_spectral_bins(struct file *file,
432 const char __user *user_buf,
433 size_t count, loff_t *ppos)
434{
435 struct ath10k *ar = file->private_data;
436 unsigned long val;
437 char buf[32];
438 ssize_t len;
439
440 len = min(count, sizeof(buf) - 1);
441 if (copy_from_user(buf, user_buf, len))
442 return -EFAULT;
443
444 buf[len] = '\0';
445 if (kstrtoul(buf, 0, &val))
446 return -EINVAL;
447
448 if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS)
449 return -EINVAL;
450
451 if (!is_power_of_2(val))
452 return -EINVAL;
453
454 mutex_lock(&ar->conf_mutex);
455 ar->spectral.config.fft_size = ilog2(val);
456 ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT;
457 mutex_unlock(&ar->conf_mutex);
458
459 return count;
460}
461
462static const struct file_operations fops_spectral_bins = {
463 .read = read_file_spectral_bins,
464 .write = write_file_spectral_bins,
465 .open = simple_open,
466 .owner = THIS_MODULE,
467 .llseek = default_llseek,
468};
469
470static struct dentry *create_buf_file_handler(const char *filename,
471 struct dentry *parent,
472 umode_t mode,
473 struct rchan_buf *buf,
474 int *is_global)
475{
476 struct dentry *buf_file;
477
478 buf_file = debugfs_create_file(filename, mode, parent, buf,
479 &relay_file_operations);
480 *is_global = 1;
481 return buf_file;
482}
483
484static int remove_buf_file_handler(struct dentry *dentry)
485{
486 debugfs_remove(dentry);
487
488 return 0;
489}
490
491static struct rchan_callbacks rfs_spec_scan_cb = {
492 .create_buf_file = create_buf_file_handler,
493 .remove_buf_file = remove_buf_file_handler,
494};
495
496int ath10k_spectral_start(struct ath10k *ar)
497{
498 struct ath10k_vif *arvif;
499
500 lockdep_assert_held(&ar->conf_mutex);
501
502 list_for_each_entry(arvif, &ar->arvifs, list)
503 arvif->spectral_enabled = 0;
504
505 ar->spectral.mode = SPECTRAL_DISABLED;
506 ar->spectral.config.count = WMI_SPECTRAL_COUNT_DEFAULT;
507 ar->spectral.config.fft_size = WMI_SPECTRAL_FFT_SIZE_DEFAULT;
508
509 return 0;
510}
511
512int ath10k_spectral_vif_stop(struct ath10k_vif *arvif)
513{
514 if (!arvif->spectral_enabled)
515 return 0;
516
517 return ath10k_spectral_scan_config(arvif->ar, SPECTRAL_DISABLED);
518}
519
520int ath10k_spectral_create(struct ath10k *ar)
521{
522 ar->spectral.rfs_chan_spec_scan = relay_open("spectral_scan",
523 ar->debug.debugfs_phy,
524 1024, 256,
525 &rfs_spec_scan_cb, NULL);
526 debugfs_create_file("spectral_scan_ctl",
527 S_IRUSR | S_IWUSR,
528 ar->debug.debugfs_phy, ar,
529 &fops_spec_scan_ctl);
530 debugfs_create_file("spectral_count",
531 S_IRUSR | S_IWUSR,
532 ar->debug.debugfs_phy, ar,
533 &fops_spectral_count);
534 debugfs_create_file("spectral_bins",
535 S_IRUSR | S_IWUSR,
536 ar->debug.debugfs_phy, ar,
537 &fops_spectral_bins);
538
539 return 0;
540}
541
542void ath10k_spectral_destroy(struct ath10k *ar)
543{
544 if (ar->spectral.rfs_chan_spec_scan) {
545 relay_close(ar->spectral.rfs_chan_spec_scan);
546 ar->spectral.rfs_chan_spec_scan = NULL;
547 }
548}
549
