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5
6#include <linux/relay.h>
7#include "core.h"
8#include "debug.h"
9#include "wmi-ops.h"
10
11static void send_fft_sample(struct ath10k *ar,
12 const struct fft_sample_tlv *fft_sample_tlv)
13{
14 int length;
15
16 if (!ar->spectral.rfs_chan_spec_scan)
17 return;
18
19 length = __be16_to_cpu(fft_sample_tlv->length) +
20 sizeof(*fft_sample_tlv);
21 relay_write(ar->spectral.rfs_chan_spec_scan, fft_sample_tlv, length);
22}
23
24static uint8_t get_max_exp(s8 max_index, u16 max_magnitude, size_t bin_len,
25 u8 *data)
26{
27 int dc_pos;
28 u8 max_exp;
29
30 dc_pos = bin_len / 2;
31
32
33 if (dc_pos < max_index || -dc_pos >= max_index)
34 return 0;
35
36 for (max_exp = 0; max_exp < 8; max_exp++) {
37 if (data[dc_pos + max_index] == (max_magnitude >> max_exp))
38 break;
39 }
40
41
42 if (data[dc_pos + max_index] != (max_magnitude >> max_exp))
43 return 0;
44
45 return max_exp;
46}
47
48static inline size_t ath10k_spectral_fix_bin_size(struct ath10k *ar,
49 size_t bin_len)
50{
51
52
53
54
55
56
57 if (!is_power_of_2(bin_len))
58 bin_len -= ar->hw_params.spectral_bin_discard;
59
60 return bin_len;
61}
62
63int ath10k_spectral_process_fft(struct ath10k *ar,
64 struct wmi_phyerr_ev_arg *phyerr,
65 const struct phyerr_fft_report *fftr,
66 size_t bin_len, u64 tsf)
67{
68 struct fft_sample_ath10k *fft_sample;
69 u8 buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS];
70 u16 freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag;
71 u32 reg0, reg1;
72 u8 chain_idx, *bins;
73 int dc_pos;
74
75 fft_sample = (struct fft_sample_ath10k *)&buf;
76
77 bin_len = ath10k_spectral_fix_bin_size(ar, bin_len);
78
79 if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS)
80 return -EINVAL;
81
82 reg0 = __le32_to_cpu(fftr->reg0);
83 reg1 = __le32_to_cpu(fftr->reg1);
84
85 length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + bin_len;
86 fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH10K;
87 fft_sample->tlv.length = __cpu_to_be16(length);
88
89
90
91
92 switch (phyerr->chan_width_mhz) {
93 case 20:
94 fft_sample->chan_width_mhz = 22;
95 break;
96 case 40:
97 fft_sample->chan_width_mhz = 44;
98 break;
99 case 80:
100
101
102
103
104
105
106 if (bin_len == 64)
107 return -EINVAL;
108 fft_sample->chan_width_mhz = 88;
109 break;
110 default:
111 fft_sample->chan_width_mhz = phyerr->chan_width_mhz;
112 }
113
114 fft_sample->relpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_RELPWR_DB);
115 fft_sample->avgpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_AVGPWR_DB);
116
117 peak_mag = MS(reg1, SEARCH_FFT_REPORT_REG1_PEAK_MAG);
118 fft_sample->max_magnitude = __cpu_to_be16(peak_mag);
119 fft_sample->max_index = MS(reg0, SEARCH_FFT_REPORT_REG0_PEAK_SIDX);
120 fft_sample->rssi = phyerr->rssi_combined;
121
122 total_gain_db = MS(reg0, SEARCH_FFT_REPORT_REG0_TOTAL_GAIN_DB);
123 base_pwr_db = MS(reg0, SEARCH_FFT_REPORT_REG0_BASE_PWR_DB);
124 fft_sample->total_gain_db = __cpu_to_be16(total_gain_db);
125 fft_sample->base_pwr_db = __cpu_to_be16(base_pwr_db);
126
127 freq1 = phyerr->freq1;
128 freq2 = phyerr->freq2;
129 fft_sample->freq1 = __cpu_to_be16(freq1);
130 fft_sample->freq2 = __cpu_to_be16(freq2);
131
132 chain_idx = MS(reg0, SEARCH_FFT_REPORT_REG0_FFT_CHN_IDX);
133
134 fft_sample->noise = __cpu_to_be16(phyerr->nf_chains[chain_idx]);
135
136 bins = (u8 *)fftr;
137 bins += sizeof(*fftr) + ar->hw_params.spectral_bin_offset;
138
139 fft_sample->tsf = __cpu_to_be64(tsf);
140
141
142
143
144 fft_sample->max_exp = get_max_exp(fft_sample->max_index, peak_mag,
145 bin_len, bins);
146
147 memcpy(fft_sample->data, bins, bin_len);
148
149
150
151
152 dc_pos = bin_len / 2;
153 fft_sample->data[dc_pos] = (fft_sample->data[dc_pos + 1] +
154 fft_sample->data[dc_pos - 1]) / 2;
155
156 send_fft_sample(ar, &fft_sample->tlv);
157
158 return 0;
159}
160
161static struct ath10k_vif *ath10k_get_spectral_vdev(struct ath10k *ar)
162{
163 struct ath10k_vif *arvif;
164
165 lockdep_assert_held(&ar->conf_mutex);
166
167 if (list_empty(&ar->arvifs))
168 return NULL;
169
170
171 list_for_each_entry(arvif, &ar->arvifs, list)
172 if (arvif->spectral_enabled)
173 return arvif;
174
175
176 return list_first_entry(&ar->arvifs, typeof(*arvif), list);
177}
178
179static int ath10k_spectral_scan_trigger(struct ath10k *ar)
180{
181 struct ath10k_vif *arvif;
182 int res;
183 int vdev_id;
184
185 lockdep_assert_held(&ar->conf_mutex);
186
187 arvif = ath10k_get_spectral_vdev(ar);
188 if (!arvif)
189 return -ENODEV;
190 vdev_id = arvif->vdev_id;
191
192 if (ar->spectral.mode == SPECTRAL_DISABLED)
193 return 0;
194
195 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
196 WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
197 WMI_SPECTRAL_ENABLE_CMD_ENABLE);
198 if (res < 0)
199 return res;
200
201 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
202 WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
203 WMI_SPECTRAL_ENABLE_CMD_ENABLE);
204 if (res < 0)
205 return res;
206
207 return 0;
208}
209
210static int ath10k_spectral_scan_config(struct ath10k *ar,
211 enum ath10k_spectral_mode mode)
212{
213 struct wmi_vdev_spectral_conf_arg arg;
214 struct ath10k_vif *arvif;
215 int vdev_id, count, res = 0;
216
217 lockdep_assert_held(&ar->conf_mutex);
218
219 arvif = ath10k_get_spectral_vdev(ar);
220 if (!arvif)
221 return -ENODEV;
222
223 vdev_id = arvif->vdev_id;
224
225 arvif->spectral_enabled = (mode != SPECTRAL_DISABLED);
226 ar->spectral.mode = mode;
227
228 res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id,
229 WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
230 WMI_SPECTRAL_ENABLE_CMD_DISABLE);
231 if (res < 0) {
232 ath10k_warn(ar, "failed to enable spectral scan: %d\n", res);
233 return res;
234 }
235
236 if (mode == SPECTRAL_DISABLED)
237 return 0;
238
239 if (mode == SPECTRAL_BACKGROUND)
240 count = WMI_SPECTRAL_COUNT_DEFAULT;
241 else
242 count = max_t(u8, 1, ar->spectral.config.count);
243
244 arg.vdev_id = vdev_id;
245 arg.scan_count = count;
246 arg.scan_period = WMI_SPECTRAL_PERIOD_DEFAULT;
247 arg.scan_priority = WMI_SPECTRAL_PRIORITY_DEFAULT;
248 arg.scan_fft_size = ar->spectral.config.fft_size;
249 arg.scan_gc_ena = WMI_SPECTRAL_GC_ENA_DEFAULT;
250 arg.scan_restart_ena = WMI_SPECTRAL_RESTART_ENA_DEFAULT;
251 arg.scan_noise_floor_ref = WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
252 arg.scan_init_delay = WMI_SPECTRAL_INIT_DELAY_DEFAULT;
253 arg.scan_nb_tone_thr = WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
254 arg.scan_str_bin_thr = WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
255 arg.scan_wb_rpt_mode = WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
256 arg.scan_rssi_rpt_mode = WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
257 arg.scan_rssi_thr = WMI_SPECTRAL_RSSI_THR_DEFAULT;
258 arg.scan_pwr_format = WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
259 arg.scan_rpt_mode = WMI_SPECTRAL_RPT_MODE_DEFAULT;
260 arg.scan_bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
261 arg.scan_dbm_adj = WMI_SPECTRAL_DBM_ADJ_DEFAULT;
262 arg.scan_chn_mask = WMI_SPECTRAL_CHN_MASK_DEFAULT;
263
264 res = ath10k_wmi_vdev_spectral_conf(ar, &arg);
265 if (res < 0) {
266 ath10k_warn(ar, "failed to configure spectral scan: %d\n", res);
267 return res;
268 }
269
270 return 0;
271}
272
273static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf,
274 size_t count, loff_t *ppos)
275{
276 struct ath10k *ar = file->private_data;
277 char *mode = "";
278 size_t len;
279 enum ath10k_spectral_mode spectral_mode;
280
281 mutex_lock(&ar->conf_mutex);
282 spectral_mode = ar->spectral.mode;
283 mutex_unlock(&ar->conf_mutex);
284
285 switch (spectral_mode) {
286 case SPECTRAL_DISABLED:
287 mode = "disable";
288 break;
289 case SPECTRAL_BACKGROUND:
290 mode = "background";
291 break;
292 case SPECTRAL_MANUAL:
293 mode = "manual";
294 break;
295 }
296
297 len = strlen(mode);
298 return simple_read_from_buffer(user_buf, count, ppos, mode, len);
299}
300
301static ssize_t write_file_spec_scan_ctl(struct file *file,
302 const char __user *user_buf,
303 size_t count, loff_t *ppos)
304{
305 struct ath10k *ar = file->private_data;
306 char buf[32];
307 ssize_t len;
308 int res;
309
310 len = min(count, sizeof(buf) - 1);
311 if (copy_from_user(buf, user_buf, len))
312 return -EFAULT;
313
314 buf[len] = '\0';
315
316 mutex_lock(&ar->conf_mutex);
317
318 if (strncmp("trigger", buf, 7) == 0) {
319 if (ar->spectral.mode == SPECTRAL_MANUAL ||
320 ar->spectral.mode == SPECTRAL_BACKGROUND) {
321
322
323
324 res = ath10k_spectral_scan_config(ar,
325 ar->spectral.mode);
326 if (res < 0) {
327 ath10k_warn(ar, "failed to reconfigure spectral scan: %d\n",
328 res);
329 }
330 res = ath10k_spectral_scan_trigger(ar);
331 if (res < 0) {
332 ath10k_warn(ar, "failed to trigger spectral scan: %d\n",
333 res);
334 }
335 } else {
336 res = -EINVAL;
337 }
338 } else if (strncmp("background", buf, 10) == 0) {
339 res = ath10k_spectral_scan_config(ar, SPECTRAL_BACKGROUND);
340 } else if (strncmp("manual", buf, 6) == 0) {
341 res = ath10k_spectral_scan_config(ar, SPECTRAL_MANUAL);
342 } else if (strncmp("disable", buf, 7) == 0) {
343 res = ath10k_spectral_scan_config(ar, SPECTRAL_DISABLED);
344 } else {
345 res = -EINVAL;
346 }
347
348 mutex_unlock(&ar->conf_mutex);
349
350 if (res < 0)
351 return res;
352
353 return count;
354}
355
356static const struct file_operations fops_spec_scan_ctl = {
357 .read = read_file_spec_scan_ctl,
358 .write = write_file_spec_scan_ctl,
359 .open = simple_open,
360 .owner = THIS_MODULE,
361 .llseek = default_llseek,
362};
363
364static ssize_t read_file_spectral_count(struct file *file,
365 char __user *user_buf,
366 size_t count, loff_t *ppos)
367{
368 struct ath10k *ar = file->private_data;
369 char buf[32];
370 size_t len;
371 u8 spectral_count;
372
373 mutex_lock(&ar->conf_mutex);
374 spectral_count = ar->spectral.config.count;
375 mutex_unlock(&ar->conf_mutex);
376
377 len = sprintf(buf, "%d\n", spectral_count);
378 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
379}
380
381static ssize_t write_file_spectral_count(struct file *file,
382 const char __user *user_buf,
383 size_t count, loff_t *ppos)
384{
385 struct ath10k *ar = file->private_data;
386 unsigned long val;
387 char buf[32];
388 ssize_t len;
389
390 len = min(count, sizeof(buf) - 1);
391 if (copy_from_user(buf, user_buf, len))
392 return -EFAULT;
393
394 buf[len] = '\0';
395 if (kstrtoul(buf, 0, &val))
396 return -EINVAL;
397
398 if (val > 255)
399 return -EINVAL;
400
401 mutex_lock(&ar->conf_mutex);
402 ar->spectral.config.count = val;
403 mutex_unlock(&ar->conf_mutex);
404
405 return count;
406}
407
408static const struct file_operations fops_spectral_count = {
409 .read = read_file_spectral_count,
410 .write = write_file_spectral_count,
411 .open = simple_open,
412 .owner = THIS_MODULE,
413 .llseek = default_llseek,
414};
415
416static ssize_t read_file_spectral_bins(struct file *file,
417 char __user *user_buf,
418 size_t count, loff_t *ppos)
419{
420 struct ath10k *ar = file->private_data;
421 char buf[32];
422 unsigned int bins, fft_size, bin_scale;
423 size_t len;
424
425 mutex_lock(&ar->conf_mutex);
426
427 fft_size = ar->spectral.config.fft_size;
428 bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT;
429 bins = 1 << (fft_size - bin_scale);
430
431 mutex_unlock(&ar->conf_mutex);
432
433 len = sprintf(buf, "%d\n", bins);
434 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
435}
436
437static ssize_t write_file_spectral_bins(struct file *file,
438 const char __user *user_buf,
439 size_t count, loff_t *ppos)
440{
441 struct ath10k *ar = file->private_data;
442 unsigned long val;
443 char buf[32];
444 ssize_t len;
445
446 len = min(count, sizeof(buf) - 1);
447 if (copy_from_user(buf, user_buf, len))
448 return -EFAULT;
449
450 buf[len] = '\0';
451 if (kstrtoul(buf, 0, &val))
452 return -EINVAL;
453
454 if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS)
455 return -EINVAL;
456
457 if (!is_power_of_2(val))
458 return -EINVAL;
459
460 mutex_lock(&ar->conf_mutex);
461 ar->spectral.config.fft_size = ilog2(val);
462 ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT;
463 mutex_unlock(&ar->conf_mutex);
464
465 return count;
466}
467
468static const struct file_operations fops_spectral_bins = {
469 .read = read_file_spectral_bins,
470 .write = write_file_spectral_bins,
471 .open = simple_open,
472 .owner = THIS_MODULE,
473 .llseek = default_llseek,
474};
475
476static struct dentry *create_buf_file_handler(const char *filename,
477 struct dentry *parent,
478 umode_t mode,
479 struct rchan_buf *buf,
480 int *is_global)
481{
482 struct dentry *buf_file;
483
484 buf_file = debugfs_create_file(filename, mode, parent, buf,
485 &relay_file_operations);
486 if (IS_ERR(buf_file))
487 return NULL;
488
489 *is_global = 1;
490 return buf_file;
491}
492
493static int remove_buf_file_handler(struct dentry *dentry)
494{
495 debugfs_remove(dentry);
496
497 return 0;
498}
499
500static const struct rchan_callbacks rfs_spec_scan_cb = {
501 .create_buf_file = create_buf_file_handler,
502 .remove_buf_file = remove_buf_file_handler,
503};
504
505int ath10k_spectral_start(struct ath10k *ar)
506{
507 struct ath10k_vif *arvif;
508
509 lockdep_assert_held(&ar->conf_mutex);
510
511 list_for_each_entry(arvif, &ar->arvifs, list)
512 arvif->spectral_enabled = 0;
513
514 ar->spectral.mode = SPECTRAL_DISABLED;
515 ar->spectral.config.count = WMI_SPECTRAL_COUNT_DEFAULT;
516 ar->spectral.config.fft_size = WMI_SPECTRAL_FFT_SIZE_DEFAULT;
517
518 return 0;
519}
520
521int ath10k_spectral_vif_stop(struct ath10k_vif *arvif)
522{
523 if (!arvif->spectral_enabled)
524 return 0;
525
526 return ath10k_spectral_scan_config(arvif->ar, SPECTRAL_DISABLED);
527}
528
529int ath10k_spectral_create(struct ath10k *ar)
530{
531
532
533
534 ar->spectral.rfs_chan_spec_scan = relay_open("spectral_scan",
535 ar->debug.debugfs_phy,
536 1140, 2500,
537 &rfs_spec_scan_cb, NULL);
538 debugfs_create_file("spectral_scan_ctl",
539 0600,
540 ar->debug.debugfs_phy, ar,
541 &fops_spec_scan_ctl);
542 debugfs_create_file("spectral_count",
543 0600,
544 ar->debug.debugfs_phy, ar,
545 &fops_spectral_count);
546 debugfs_create_file("spectral_bins",
547 0600,
548 ar->debug.debugfs_phy, ar,
549 &fops_spectral_bins);
550
551 return 0;
552}
553
554void ath10k_spectral_destroy(struct ath10k *ar)
555{
556 if (ar->spectral.rfs_chan_spec_scan) {
557 relay_close(ar->spectral.rfs_chan_spec_scan);
558 ar->spectral.rfs_chan_spec_scan = NULL;
559 }
560}
561
