1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6
7 #include <linux/relay.h>
8 #include "core.h"
9 #include "debug.h"
10
11 #define ATH11K_SPECTRAL_NUM_RESP_PER_EVENT 2
12 #define ATH11K_SPECTRAL_EVENT_TIMEOUT_MS 1
13
14 #define ATH11K_SPECTRAL_DWORD_SIZE 4
15 #define ATH11K_SPECTRAL_MIN_BINS 32
16 #define ATH11K_SPECTRAL_MIN_IB_BINS (ATH11K_SPECTRAL_MIN_BINS >> 1)
17 #define ATH11K_SPECTRAL_MAX_IB_BINS(x) ((x)->hw_params.spectral.max_fft_bins >> 1)
18
19 #define ATH11K_SPECTRAL_SCAN_COUNT_MAX 4095
20
21 /* Max channel computed by sum of 2g and 5g band channels */
22 #define ATH11K_SPECTRAL_TOTAL_CHANNEL 41
23 #define ATH11K_SPECTRAL_SAMPLES_PER_CHANNEL 70
24 #define ATH11K_SPECTRAL_PER_SAMPLE_SIZE(x) (sizeof(struct fft_sample_ath11k) + \
25 ATH11K_SPECTRAL_MAX_IB_BINS(x))
26 #define ATH11K_SPECTRAL_TOTAL_SAMPLE (ATH11K_SPECTRAL_TOTAL_CHANNEL * \
27 ATH11K_SPECTRAL_SAMPLES_PER_CHANNEL)
28 #define ATH11K_SPECTRAL_SUB_BUFF_SIZE(x) ATH11K_SPECTRAL_PER_SAMPLE_SIZE(x)
29 #define ATH11K_SPECTRAL_NUM_SUB_BUF ATH11K_SPECTRAL_TOTAL_SAMPLE
30
31 #define ATH11K_SPECTRAL_20MHZ 20
32 #define ATH11K_SPECTRAL_40MHZ 40
33 #define ATH11K_SPECTRAL_80MHZ 80
34 #define ATH11K_SPECTRAL_160MHZ 160
35
36 #define ATH11K_SPECTRAL_SIGNATURE 0xFA
37
38 #define ATH11K_SPECTRAL_TAG_RADAR_SUMMARY 0x0
39 #define ATH11K_SPECTRAL_TAG_RADAR_FFT 0x1
40 #define ATH11K_SPECTRAL_TAG_SCAN_SUMMARY 0x2
41 #define ATH11K_SPECTRAL_TAG_SCAN_SEARCH 0x3
42
43 #define SPECTRAL_TLV_HDR_LEN GENMASK(15, 0)
44 #define SPECTRAL_TLV_HDR_TAG GENMASK(23, 16)
45 #define SPECTRAL_TLV_HDR_SIGN GENMASK(31, 24)
46
47 #define SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN GENMASK(7, 0)
48 #define SPECTRAL_SUMMARY_INFO0_OB_FLAG BIT(8)
49 #define SPECTRAL_SUMMARY_INFO0_GRP_IDX GENMASK(16, 9)
50 #define SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT BIT(17)
51 #define SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB GENMASK(27, 18)
52 #define SPECTRAL_SUMMARY_INFO0_FALSE_SCAN BIT(28)
53 #define SPECTRAL_SUMMARY_INFO0_DETECTOR_ID GENMASK(30, 29)
54 #define SPECTRAL_SUMMARY_INFO0_PRI80 BIT(31)
55
56 #define SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX GENMASK(11, 0)
57 #define SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE GENMASK(21, 12)
58 #define SPECTRAL_SUMMARY_INFO2_NARROWBAND_MASK GENMASK(29, 22)
59 #define SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE BIT(30)
60
61 struct spectral_tlv {
62 __le32 timestamp;
63 __le32 header;
64 } __packed;
65
66 struct spectral_summary_fft_report {
67 __le32 timestamp;
68 __le32 tlv_header;
69 __le32 info0;
70 __le32 reserve0;
71 __le32 info2;
72 __le32 reserve1;
73 } __packed;
74
75 struct ath11k_spectral_summary_report {
76 struct wmi_dma_buf_release_meta_data meta;
77 u32 timestamp;
78 u8 agc_total_gain;
79 u8 grp_idx;
80 u16 inb_pwr_db;
81 s16 peak_idx;
82 u16 peak_mag;
83 u8 detector_id;
84 bool out_of_band_flag;
85 bool rf_saturation;
86 bool primary80;
87 bool gain_change;
88 bool false_scan;
89 };
90
91 #define SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID GENMASK(1, 0)
92 #define SPECTRAL_FFT_REPORT_INFO0_FFT_NUM GENMASK(4, 2)
93 #define SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK GENMASK(16, 5)
94 #define SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX GENMASK(27, 17)
95 #define SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX GENMASK(30, 28)
96
97 #define SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB GENMASK(8, 0)
98 #define SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB GENMASK(16, 9)
99
100 #define SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS GENMASK(7, 0)
101 #define SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE GENMASK(17, 8)
102 #define SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB GENMASK(24, 18)
103 #define SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB GENMASK(31, 25)
104
105 struct spectral_search_fft_report {
106 __le32 timestamp;
107 __le32 tlv_header;
108 __le32 info0;
109 __le32 info1;
110 __le32 info2;
111 __le32 reserve0;
112 u8 bins[];
113 } __packed;
114
115 struct ath11k_spectral_search_report {
116 u32 timestamp;
117 u8 detector_id;
118 u8 fft_count;
119 u16 radar_check;
120 s16 peak_idx;
121 u8 chain_idx;
122 u16 base_pwr_db;
123 u8 total_gain_db;
124 u8 strong_bin_count;
125 u16 peak_mag;
126 u8 avg_pwr_db;
127 u8 rel_pwr_db;
128 };
129
create_buf_file_handler(const char * filename,struct dentry * parent,umode_t mode,struct rchan_buf * buf,int * is_global)130 static struct dentry *create_buf_file_handler(const char *filename,
131 struct dentry *parent,
132 umode_t mode,
133 struct rchan_buf *buf,
134 int *is_global)
135 {
136 struct dentry *buf_file;
137
138 buf_file = debugfs_create_file(filename, mode, parent, buf,
139 &relay_file_operations);
140 *is_global = 1;
141 return buf_file;
142 }
143
remove_buf_file_handler(struct dentry * dentry)144 static int remove_buf_file_handler(struct dentry *dentry)
145 {
146 debugfs_remove(dentry);
147
148 return 0;
149 }
150
151 static const struct rchan_callbacks rfs_scan_cb = {
152 .create_buf_file = create_buf_file_handler,
153 .remove_buf_file = remove_buf_file_handler,
154 };
155
ath11k_spectral_get_vdev(struct ath11k * ar)156 static struct ath11k_vif *ath11k_spectral_get_vdev(struct ath11k *ar)
157 {
158 struct ath11k_vif *arvif;
159
160 lockdep_assert_held(&ar->conf_mutex);
161
162 if (list_empty(&ar->arvifs))
163 return NULL;
164
165 /* if there already is a vif doing spectral, return that. */
166 list_for_each_entry(arvif, &ar->arvifs, list)
167 if (arvif->spectral_enabled)
168 return arvif;
169
170 /* otherwise, return the first vif. */
171 return list_first_entry(&ar->arvifs, typeof(*arvif), list);
172 }
173
ath11k_spectral_scan_trigger(struct ath11k * ar)174 static int ath11k_spectral_scan_trigger(struct ath11k *ar)
175 {
176 struct ath11k_vif *arvif;
177 int ret;
178
179 lockdep_assert_held(&ar->conf_mutex);
180
181 arvif = ath11k_spectral_get_vdev(ar);
182 if (!arvif)
183 return -ENODEV;
184
185 if (ar->spectral.mode == ATH11K_SPECTRAL_DISABLED)
186 return 0;
187
188 ar->spectral.is_primary = true;
189
190 ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
191 ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
192 ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
193 if (ret)
194 return ret;
195
196 ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
197 ATH11K_WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
198 ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
199 if (ret)
200 return ret;
201
202 return 0;
203 }
204
ath11k_spectral_scan_config(struct ath11k * ar,enum ath11k_spectral_mode mode)205 static int ath11k_spectral_scan_config(struct ath11k *ar,
206 enum ath11k_spectral_mode mode)
207 {
208 struct ath11k_wmi_vdev_spectral_conf_param param = { 0 };
209 struct ath11k_vif *arvif;
210 int ret, count;
211
212 lockdep_assert_held(&ar->conf_mutex);
213
214 arvif = ath11k_spectral_get_vdev(ar);
215 if (!arvif)
216 return -ENODEV;
217
218 arvif->spectral_enabled = (mode != ATH11K_SPECTRAL_DISABLED);
219
220 spin_lock_bh(&ar->spectral.lock);
221 ar->spectral.mode = mode;
222 spin_unlock_bh(&ar->spectral.lock);
223
224 ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
225 ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
226 ATH11K_WMI_SPECTRAL_ENABLE_CMD_DISABLE);
227 if (ret) {
228 ath11k_warn(ar->ab, "failed to enable spectral scan: %d\n", ret);
229 return ret;
230 }
231
232 if (mode == ATH11K_SPECTRAL_DISABLED)
233 return 0;
234
235 if (mode == ATH11K_SPECTRAL_BACKGROUND)
236 count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
237 else
238 count = max_t(u16, 1, ar->spectral.count);
239
240 param.vdev_id = arvif->vdev_id;
241 param.scan_count = count;
242 param.scan_fft_size = ar->spectral.fft_size;
243 param.scan_period = ATH11K_WMI_SPECTRAL_PERIOD_DEFAULT;
244 param.scan_priority = ATH11K_WMI_SPECTRAL_PRIORITY_DEFAULT;
245 param.scan_gc_ena = ATH11K_WMI_SPECTRAL_GC_ENA_DEFAULT;
246 param.scan_restart_ena = ATH11K_WMI_SPECTRAL_RESTART_ENA_DEFAULT;
247 param.scan_noise_floor_ref = ATH11K_WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
248 param.scan_init_delay = ATH11K_WMI_SPECTRAL_INIT_DELAY_DEFAULT;
249 param.scan_nb_tone_thr = ATH11K_WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
250 param.scan_str_bin_thr = ATH11K_WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
251 param.scan_wb_rpt_mode = ATH11K_WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
252 param.scan_rssi_rpt_mode = ATH11K_WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
253 param.scan_rssi_thr = ATH11K_WMI_SPECTRAL_RSSI_THR_DEFAULT;
254 param.scan_pwr_format = ATH11K_WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
255 param.scan_rpt_mode = ATH11K_WMI_SPECTRAL_RPT_MODE_DEFAULT;
256 param.scan_bin_scale = ATH11K_WMI_SPECTRAL_BIN_SCALE_DEFAULT;
257 param.scan_dbm_adj = ATH11K_WMI_SPECTRAL_DBM_ADJ_DEFAULT;
258 param.scan_chn_mask = ATH11K_WMI_SPECTRAL_CHN_MASK_DEFAULT;
259
260 ret = ath11k_wmi_vdev_spectral_conf(ar, ¶m);
261 if (ret) {
262 ath11k_warn(ar->ab, "failed to configure spectral scan: %d\n", ret);
263 return ret;
264 }
265
266 return 0;
267 }
268
ath11k_read_file_spec_scan_ctl(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)269 static ssize_t ath11k_read_file_spec_scan_ctl(struct file *file,
270 char __user *user_buf,
271 size_t count, loff_t *ppos)
272 {
273 struct ath11k *ar = file->private_data;
274 char *mode = "";
275 size_t len;
276 enum ath11k_spectral_mode spectral_mode;
277
278 mutex_lock(&ar->conf_mutex);
279 spectral_mode = ar->spectral.mode;
280 mutex_unlock(&ar->conf_mutex);
281
282 switch (spectral_mode) {
283 case ATH11K_SPECTRAL_DISABLED:
284 mode = "disable";
285 break;
286 case ATH11K_SPECTRAL_BACKGROUND:
287 mode = "background";
288 break;
289 case ATH11K_SPECTRAL_MANUAL:
290 mode = "manual";
291 break;
292 }
293
294 len = strlen(mode);
295 return simple_read_from_buffer(user_buf, count, ppos, mode, len);
296 }
297
ath11k_write_file_spec_scan_ctl(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)298 static ssize_t ath11k_write_file_spec_scan_ctl(struct file *file,
299 const char __user *user_buf,
300 size_t count, loff_t *ppos)
301 {
302 struct ath11k *ar = file->private_data;
303 char buf[32];
304 ssize_t len;
305 int ret;
306
307 len = min(count, sizeof(buf) - 1);
308 if (copy_from_user(buf, user_buf, len))
309 return -EFAULT;
310
311 buf[len] = '\0';
312
313 mutex_lock(&ar->conf_mutex);
314
315 if (strncmp("trigger", buf, 7) == 0) {
316 if (ar->spectral.mode == ATH11K_SPECTRAL_MANUAL ||
317 ar->spectral.mode == ATH11K_SPECTRAL_BACKGROUND) {
318 /* reset the configuration to adopt possibly changed
319 * debugfs parameters
320 */
321 ret = ath11k_spectral_scan_config(ar, ar->spectral.mode);
322 if (ret) {
323 ath11k_warn(ar->ab, "failed to reconfigure spectral scan: %d\n",
324 ret);
325 goto unlock;
326 }
327
328 ret = ath11k_spectral_scan_trigger(ar);
329 if (ret) {
330 ath11k_warn(ar->ab, "failed to trigger spectral scan: %d\n",
331 ret);
332 }
333 } else {
334 ret = -EINVAL;
335 }
336 } else if (strncmp("background", buf, 10) == 0) {
337 ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_BACKGROUND);
338 } else if (strncmp("manual", buf, 6) == 0) {
339 ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_MANUAL);
340 } else if (strncmp("disable", buf, 7) == 0) {
341 ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
342 } else {
343 ret = -EINVAL;
344 }
345
346 unlock:
347 mutex_unlock(&ar->conf_mutex);
348
349 if (ret)
350 return ret;
351
352 return count;
353 }
354
355 static const struct file_operations fops_scan_ctl = {
356 .read = ath11k_read_file_spec_scan_ctl,
357 .write = ath11k_write_file_spec_scan_ctl,
358 .open = simple_open,
359 .owner = THIS_MODULE,
360 .llseek = default_llseek,
361 };
362
ath11k_read_file_spectral_count(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)363 static ssize_t ath11k_read_file_spectral_count(struct file *file,
364 char __user *user_buf,
365 size_t count, loff_t *ppos)
366 {
367 struct ath11k *ar = file->private_data;
368 char buf[32];
369 size_t len;
370 u16 spectral_count;
371
372 mutex_lock(&ar->conf_mutex);
373 spectral_count = ar->spectral.count;
374 mutex_unlock(&ar->conf_mutex);
375
376 len = sprintf(buf, "%d\n", spectral_count);
377 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
378 }
379
ath11k_write_file_spectral_count(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)380 static ssize_t ath11k_write_file_spectral_count(struct file *file,
381 const char __user *user_buf,
382 size_t count, loff_t *ppos)
383 {
384 struct ath11k *ar = file->private_data;
385 unsigned long val;
386 ssize_t ret;
387
388 ret = kstrtoul_from_user(user_buf, count, 0, &val);
389 if (ret)
390 return ret;
391
392 if (val > ATH11K_SPECTRAL_SCAN_COUNT_MAX)
393 return -EINVAL;
394
395 mutex_lock(&ar->conf_mutex);
396 ar->spectral.count = val;
397 mutex_unlock(&ar->conf_mutex);
398
399 return count;
400 }
401
402 static const struct file_operations fops_scan_count = {
403 .read = ath11k_read_file_spectral_count,
404 .write = ath11k_write_file_spectral_count,
405 .open = simple_open,
406 .owner = THIS_MODULE,
407 .llseek = default_llseek,
408 };
409
ath11k_read_file_spectral_bins(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)410 static ssize_t ath11k_read_file_spectral_bins(struct file *file,
411 char __user *user_buf,
412 size_t count, loff_t *ppos)
413 {
414 struct ath11k *ar = file->private_data;
415 char buf[32];
416 unsigned int bins, fft_size;
417 size_t len;
418
419 mutex_lock(&ar->conf_mutex);
420
421 fft_size = ar->spectral.fft_size;
422 bins = 1 << fft_size;
423
424 mutex_unlock(&ar->conf_mutex);
425
426 len = sprintf(buf, "%d\n", bins);
427 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
428 }
429
ath11k_write_file_spectral_bins(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)430 static ssize_t ath11k_write_file_spectral_bins(struct file *file,
431 const char __user *user_buf,
432 size_t count, loff_t *ppos)
433 {
434 struct ath11k *ar = file->private_data;
435 unsigned long val;
436 ssize_t ret;
437
438 ret = kstrtoul_from_user(user_buf, count, 0, &val);
439 if (ret)
440 return ret;
441
442 if (val < ATH11K_SPECTRAL_MIN_BINS ||
443 val > ar->ab->hw_params.spectral.max_fft_bins)
444 return -EINVAL;
445
446 if (!is_power_of_2(val))
447 return -EINVAL;
448
449 mutex_lock(&ar->conf_mutex);
450 ar->spectral.fft_size = ilog2(val);
451 mutex_unlock(&ar->conf_mutex);
452
453 return count;
454 }
455
456 static const struct file_operations fops_scan_bins = {
457 .read = ath11k_read_file_spectral_bins,
458 .write = ath11k_write_file_spectral_bins,
459 .open = simple_open,
460 .owner = THIS_MODULE,
461 .llseek = default_llseek,
462 };
463
ath11k_spectral_pull_summary(struct ath11k * ar,struct wmi_dma_buf_release_meta_data * meta,struct spectral_summary_fft_report * summary,struct ath11k_spectral_summary_report * report)464 static int ath11k_spectral_pull_summary(struct ath11k *ar,
465 struct wmi_dma_buf_release_meta_data *meta,
466 struct spectral_summary_fft_report *summary,
467 struct ath11k_spectral_summary_report *report)
468 {
469 report->timestamp = __le32_to_cpu(summary->timestamp);
470 report->agc_total_gain = FIELD_GET(SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN,
471 __le32_to_cpu(summary->info0));
472 report->out_of_band_flag = FIELD_GET(SPECTRAL_SUMMARY_INFO0_OB_FLAG,
473 __le32_to_cpu(summary->info0));
474 report->grp_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO0_GRP_IDX,
475 __le32_to_cpu(summary->info0));
476 report->rf_saturation = FIELD_GET(SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT,
477 __le32_to_cpu(summary->info0));
478 report->inb_pwr_db = FIELD_GET(SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB,
479 __le32_to_cpu(summary->info0));
480 report->false_scan = FIELD_GET(SPECTRAL_SUMMARY_INFO0_FALSE_SCAN,
481 __le32_to_cpu(summary->info0));
482 report->detector_id = FIELD_GET(SPECTRAL_SUMMARY_INFO0_DETECTOR_ID,
483 __le32_to_cpu(summary->info0));
484 report->primary80 = FIELD_GET(SPECTRAL_SUMMARY_INFO0_PRI80,
485 __le32_to_cpu(summary->info0));
486 report->peak_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX,
487 __le32_to_cpu(summary->info2));
488 report->peak_mag = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE,
489 __le32_to_cpu(summary->info2));
490 report->gain_change = FIELD_GET(SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE,
491 __le32_to_cpu(summary->info2));
492
493 memcpy(&report->meta, meta, sizeof(*meta));
494
495 return 0;
496 }
497
ath11k_spectral_pull_search(struct ath11k * ar,struct spectral_search_fft_report * search,struct ath11k_spectral_search_report * report)498 static int ath11k_spectral_pull_search(struct ath11k *ar,
499 struct spectral_search_fft_report *search,
500 struct ath11k_spectral_search_report *report)
501 {
502 report->timestamp = __le32_to_cpu(search->timestamp);
503 report->detector_id = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID,
504 __le32_to_cpu(search->info0));
505 report->fft_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_FFT_NUM,
506 __le32_to_cpu(search->info0));
507 report->radar_check = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK,
508 __le32_to_cpu(search->info0));
509 report->peak_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
510 __le32_to_cpu(search->info0));
511 report->chain_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX,
512 __le32_to_cpu(search->info0));
513 report->base_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB,
514 __le32_to_cpu(search->info1));
515 report->total_gain_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB,
516 __le32_to_cpu(search->info1));
517 report->strong_bin_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS,
518 __le32_to_cpu(search->info2));
519 report->peak_mag = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE,
520 __le32_to_cpu(search->info2));
521 report->avg_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB,
522 __le32_to_cpu(search->info2));
523 report->rel_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB,
524 __le32_to_cpu(search->info2));
525
526 return 0;
527 }
528
ath11k_spectral_get_max_exp(s8 max_index,u8 max_magnitude,int bin_len,u8 * bins)529 static u8 ath11k_spectral_get_max_exp(s8 max_index, u8 max_magnitude,
530 int bin_len, u8 *bins)
531 {
532 int dc_pos;
533 u8 max_exp;
534
535 dc_pos = bin_len / 2;
536
537 /* peak index outside of bins */
538 if (dc_pos <= max_index || -dc_pos >= max_index)
539 return 0;
540
541 for (max_exp = 0; max_exp < 8; max_exp++) {
542 if (bins[dc_pos + max_index] == (max_magnitude >> max_exp))
543 break;
544 }
545
546 /* max_exp not found */
547 if (bins[dc_pos + max_index] != (max_magnitude >> max_exp))
548 return 0;
549
550 return max_exp;
551 }
552
ath11k_spectral_parse_fft(u8 * outbins,u8 * inbins,int num_bins,u8 fft_sz)553 static void ath11k_spectral_parse_fft(u8 *outbins, u8 *inbins, int num_bins, u8 fft_sz)
554 {
555 int i, j;
556
557 i = 0;
558 j = 0;
559 while (i < num_bins) {
560 outbins[i] = inbins[j];
561 i++;
562 j += fft_sz;
563 }
564 }
565
566 static
ath11k_spectral_process_fft(struct ath11k * ar,struct ath11k_spectral_summary_report * summary,void * data,struct fft_sample_ath11k * fft_sample,u32 data_len)567 int ath11k_spectral_process_fft(struct ath11k *ar,
568 struct ath11k_spectral_summary_report *summary,
569 void *data,
570 struct fft_sample_ath11k *fft_sample,
571 u32 data_len)
572 {
573 struct ath11k_base *ab = ar->ab;
574 struct spectral_search_fft_report *fft_report = data;
575 struct ath11k_spectral_search_report search;
576 struct spectral_tlv *tlv;
577 int tlv_len, bin_len, num_bins;
578 u16 length, freq;
579 u8 chan_width_mhz, bin_sz;
580 int ret;
581 u32 check_length;
582 bool fragment_sample = false;
583
584 lockdep_assert_held(&ar->spectral.lock);
585
586 if (!ab->hw_params.spectral.fft_sz) {
587 ath11k_warn(ab, "invalid bin size type for hw rev %d\n",
588 ab->hw_rev);
589 return -EINVAL;
590 }
591
592 tlv = data;
593 tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN, __le32_to_cpu(tlv->header));
594 /* convert Dword into bytes */
595 tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
596 bin_len = tlv_len - ab->hw_params.spectral.fft_hdr_len;
597
598 if (data_len < (bin_len + sizeof(*fft_report))) {
599 ath11k_warn(ab, "mismatch in expected bin len %d and data len %d\n",
600 bin_len, data_len);
601 return -EINVAL;
602 }
603
604 bin_sz = ab->hw_params.spectral.fft_sz + ab->hw_params.spectral.fft_pad_sz;
605 num_bins = bin_len / bin_sz;
606 /* Only In-band bins are useful to user for visualize */
607 num_bins >>= 1;
608
609 if (num_bins < ATH11K_SPECTRAL_MIN_IB_BINS ||
610 num_bins > ATH11K_SPECTRAL_MAX_IB_BINS(ab) ||
611 !is_power_of_2(num_bins)) {
612 ath11k_warn(ab, "Invalid num of bins %d\n", num_bins);
613 return -EINVAL;
614 }
615
616 check_length = sizeof(*fft_report) + (num_bins * ab->hw_params.spectral.fft_sz);
617 ret = ath11k_dbring_validate_buffer(ar, data, check_length);
618 if (ret) {
619 ath11k_warn(ar->ab, "found magic value in fft data, dropping\n");
620 return ret;
621 }
622
623 ret = ath11k_spectral_pull_search(ar, data, &search);
624 if (ret) {
625 ath11k_warn(ab, "failed to pull search report %d\n", ret);
626 return ret;
627 }
628
629 chan_width_mhz = summary->meta.ch_width;
630
631 switch (chan_width_mhz) {
632 case ATH11K_SPECTRAL_20MHZ:
633 case ATH11K_SPECTRAL_40MHZ:
634 case ATH11K_SPECTRAL_80MHZ:
635 fft_sample->chan_width_mhz = chan_width_mhz;
636 break;
637 case ATH11K_SPECTRAL_160MHZ:
638 if (ab->hw_params.spectral.fragment_160mhz) {
639 chan_width_mhz /= 2;
640 fragment_sample = true;
641 }
642 fft_sample->chan_width_mhz = chan_width_mhz;
643 break;
644 default:
645 ath11k_warn(ab, "invalid channel width %d\n", chan_width_mhz);
646 return -EINVAL;
647 }
648
649 length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + num_bins;
650 fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH11K;
651 fft_sample->tlv.length = __cpu_to_be16(length);
652
653 fft_sample->tsf = __cpu_to_be32(search.timestamp);
654 fft_sample->max_magnitude = __cpu_to_be16(search.peak_mag);
655 fft_sample->max_index = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
656 __le32_to_cpu(fft_report->info0));
657
658 summary->inb_pwr_db >>= 1;
659 fft_sample->rssi = __cpu_to_be16(summary->inb_pwr_db);
660 fft_sample->noise = __cpu_to_be32(summary->meta.noise_floor[search.chain_idx]);
661
662 freq = summary->meta.freq1;
663 fft_sample->freq1 = __cpu_to_be16(freq);
664
665 freq = summary->meta.freq2;
666 fft_sample->freq2 = __cpu_to_be16(freq);
667
668 /* If freq2 is available then the spectral scan results are fragmented
669 * as primary and secondary
670 */
671 if (fragment_sample && freq) {
672 if (!ar->spectral.is_primary)
673 fft_sample->freq1 = cpu_to_be16(freq);
674
675 /* We have to toggle the is_primary to handle the next report */
676 ar->spectral.is_primary = !ar->spectral.is_primary;
677 }
678
679 ath11k_spectral_parse_fft(fft_sample->data, fft_report->bins, num_bins,
680 ab->hw_params.spectral.fft_sz);
681
682 fft_sample->max_exp = ath11k_spectral_get_max_exp(fft_sample->max_index,
683 search.peak_mag,
684 num_bins,
685 fft_sample->data);
686
687 if (ar->spectral.rfs_scan)
688 relay_write(ar->spectral.rfs_scan, fft_sample,
689 length + sizeof(struct fft_sample_tlv));
690
691 return 0;
692 }
693
ath11k_spectral_process_data(struct ath11k * ar,struct ath11k_dbring_data * param)694 static int ath11k_spectral_process_data(struct ath11k *ar,
695 struct ath11k_dbring_data *param)
696 {
697 struct ath11k_base *ab = ar->ab;
698 struct spectral_tlv *tlv;
699 struct spectral_summary_fft_report *summary = NULL;
700 struct ath11k_spectral_summary_report summ_rpt;
701 struct fft_sample_ath11k *fft_sample = NULL;
702 u8 *data;
703 u32 data_len, i;
704 u8 sign, tag;
705 int tlv_len, sample_sz;
706 int ret;
707 bool quit = false;
708
709 spin_lock_bh(&ar->spectral.lock);
710
711 if (!ar->spectral.enabled) {
712 ret = -EINVAL;
713 goto unlock;
714 }
715
716 sample_sz = sizeof(*fft_sample) + ATH11K_SPECTRAL_MAX_IB_BINS(ab);
717 fft_sample = kmalloc(sample_sz, GFP_ATOMIC);
718 if (!fft_sample) {
719 ret = -ENOBUFS;
720 goto unlock;
721 }
722
723 data = param->data;
724 data_len = param->data_sz;
725 i = 0;
726 while (!quit && (i < data_len)) {
727 if ((i + sizeof(*tlv)) > data_len) {
728 ath11k_warn(ab, "failed to parse spectral tlv hdr at bytes %d\n",
729 i);
730 ret = -EINVAL;
731 goto err;
732 }
733
734 tlv = (struct spectral_tlv *)&data[i];
735 sign = FIELD_GET(SPECTRAL_TLV_HDR_SIGN,
736 __le32_to_cpu(tlv->header));
737 if (sign != ATH11K_SPECTRAL_SIGNATURE) {
738 ath11k_warn(ab, "Invalid sign 0x%x at bytes %d\n",
739 sign, i);
740 ret = -EINVAL;
741 goto err;
742 }
743
744 tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN,
745 __le32_to_cpu(tlv->header));
746 /* convert Dword into bytes */
747 tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
748 if ((i + sizeof(*tlv) + tlv_len) > data_len) {
749 ath11k_warn(ab, "failed to parse spectral tlv payload at bytes %d tlv_len:%d data_len:%d\n",
750 i, tlv_len, data_len);
751 ret = -EINVAL;
752 goto err;
753 }
754
755 tag = FIELD_GET(SPECTRAL_TLV_HDR_TAG,
756 __le32_to_cpu(tlv->header));
757 switch (tag) {
758 case ATH11K_SPECTRAL_TAG_SCAN_SUMMARY:
759 /* HW bug in tlv length of summary report,
760 * HW report 3 DWORD size but the data payload
761 * is 4 DWORD size (16 bytes).
762 * Need to remove this workaround once HW bug fixed
763 */
764 tlv_len = sizeof(*summary) - sizeof(*tlv) +
765 ab->hw_params.spectral.summary_pad_sz;
766
767 if (tlv_len < (sizeof(*summary) - sizeof(*tlv))) {
768 ath11k_warn(ab, "failed to parse spectral summary at bytes %d tlv_len:%d\n",
769 i, tlv_len);
770 ret = -EINVAL;
771 goto err;
772 }
773
774 ret = ath11k_dbring_validate_buffer(ar, data, tlv_len);
775 if (ret) {
776 ath11k_warn(ar->ab, "found magic value in spectral summary, dropping\n");
777 goto err;
778 }
779
780 summary = (struct spectral_summary_fft_report *)tlv;
781 ath11k_spectral_pull_summary(ar, ¶m->meta,
782 summary, &summ_rpt);
783 break;
784 case ATH11K_SPECTRAL_TAG_SCAN_SEARCH:
785 if (tlv_len < (sizeof(struct spectral_search_fft_report) -
786 sizeof(*tlv))) {
787 ath11k_warn(ab, "failed to parse spectral search fft at bytes %d\n",
788 i);
789 ret = -EINVAL;
790 goto err;
791 }
792
793 memset(fft_sample, 0, sample_sz);
794 ret = ath11k_spectral_process_fft(ar, &summ_rpt, tlv,
795 fft_sample,
796 data_len - i);
797 if (ret) {
798 ath11k_warn(ab, "failed to process spectral fft at bytes %d\n",
799 i);
800 goto err;
801 }
802 quit = true;
803 break;
804 }
805
806 i += sizeof(*tlv) + tlv_len;
807 }
808
809 ret = 0;
810
811 err:
812 kfree(fft_sample);
813 unlock:
814 spin_unlock_bh(&ar->spectral.lock);
815 return ret;
816 }
817
ath11k_spectral_ring_alloc(struct ath11k * ar,struct ath11k_dbring_cap * db_cap)818 static int ath11k_spectral_ring_alloc(struct ath11k *ar,
819 struct ath11k_dbring_cap *db_cap)
820 {
821 struct ath11k_spectral *sp = &ar->spectral;
822 int ret;
823
824 ret = ath11k_dbring_srng_setup(ar, &sp->rx_ring,
825 0, db_cap->min_elem);
826 if (ret) {
827 ath11k_warn(ar->ab, "failed to setup db ring\n");
828 return ret;
829 }
830
831 ath11k_dbring_set_cfg(ar, &sp->rx_ring,
832 ATH11K_SPECTRAL_NUM_RESP_PER_EVENT,
833 ATH11K_SPECTRAL_EVENT_TIMEOUT_MS,
834 ath11k_spectral_process_data);
835
836 ret = ath11k_dbring_buf_setup(ar, &sp->rx_ring, db_cap);
837 if (ret) {
838 ath11k_warn(ar->ab, "failed to setup db ring buffer\n");
839 goto srng_cleanup;
840 }
841
842 ret = ath11k_dbring_wmi_cfg_setup(ar, &sp->rx_ring,
843 WMI_DIRECT_BUF_SPECTRAL);
844 if (ret) {
845 ath11k_warn(ar->ab, "failed to setup db ring cfg\n");
846 goto buffer_cleanup;
847 }
848
849 return 0;
850
851 buffer_cleanup:
852 ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
853 srng_cleanup:
854 ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
855 return ret;
856 }
857
ath11k_spectral_ring_free(struct ath11k * ar)858 static inline void ath11k_spectral_ring_free(struct ath11k *ar)
859 {
860 struct ath11k_spectral *sp = &ar->spectral;
861
862 ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
863 ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
864 }
865
ath11k_spectral_debug_unregister(struct ath11k * ar)866 static inline void ath11k_spectral_debug_unregister(struct ath11k *ar)
867 {
868 debugfs_remove(ar->spectral.scan_bins);
869 ar->spectral.scan_bins = NULL;
870
871 debugfs_remove(ar->spectral.scan_count);
872 ar->spectral.scan_count = NULL;
873
874 debugfs_remove(ar->spectral.scan_ctl);
875 ar->spectral.scan_ctl = NULL;
876
877 if (ar->spectral.rfs_scan) {
878 relay_close(ar->spectral.rfs_scan);
879 ar->spectral.rfs_scan = NULL;
880 }
881 }
882
ath11k_spectral_vif_stop(struct ath11k_vif * arvif)883 int ath11k_spectral_vif_stop(struct ath11k_vif *arvif)
884 {
885 if (!arvif->spectral_enabled)
886 return 0;
887
888 return ath11k_spectral_scan_config(arvif->ar, ATH11K_SPECTRAL_DISABLED);
889 }
890
ath11k_spectral_reset_buffer(struct ath11k * ar)891 void ath11k_spectral_reset_buffer(struct ath11k *ar)
892 {
893 if (!ar->spectral.enabled)
894 return;
895
896 if (ar->spectral.rfs_scan)
897 relay_reset(ar->spectral.rfs_scan);
898 }
899
ath11k_spectral_deinit(struct ath11k_base * ab)900 void ath11k_spectral_deinit(struct ath11k_base *ab)
901 {
902 struct ath11k *ar;
903 struct ath11k_spectral *sp;
904 int i;
905
906 for (i = 0; i < ab->num_radios; i++) {
907 ar = ab->pdevs[i].ar;
908 sp = &ar->spectral;
909
910 if (!sp->enabled)
911 continue;
912
913 mutex_lock(&ar->conf_mutex);
914 ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
915 mutex_unlock(&ar->conf_mutex);
916
917 spin_lock_bh(&sp->lock);
918 sp->enabled = false;
919 spin_unlock_bh(&sp->lock);
920
921 ath11k_spectral_debug_unregister(ar);
922 ath11k_spectral_ring_free(ar);
923 }
924 }
925
ath11k_spectral_debug_register(struct ath11k * ar)926 static inline int ath11k_spectral_debug_register(struct ath11k *ar)
927 {
928 int ret;
929
930 ar->spectral.rfs_scan = relay_open("spectral_scan",
931 ar->debug.debugfs_pdev,
932 ATH11K_SPECTRAL_SUB_BUFF_SIZE(ar->ab),
933 ATH11K_SPECTRAL_NUM_SUB_BUF,
934 &rfs_scan_cb, NULL);
935 if (!ar->spectral.rfs_scan) {
936 ath11k_warn(ar->ab, "failed to open relay in pdev %d\n",
937 ar->pdev_idx);
938 return -EINVAL;
939 }
940
941 ar->spectral.scan_ctl = debugfs_create_file("spectral_scan_ctl",
942 0600,
943 ar->debug.debugfs_pdev, ar,
944 &fops_scan_ctl);
945 if (!ar->spectral.scan_ctl) {
946 ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
947 ar->pdev_idx);
948 ret = -EINVAL;
949 goto debug_unregister;
950 }
951
952 ar->spectral.scan_count = debugfs_create_file("spectral_count",
953 0600,
954 ar->debug.debugfs_pdev, ar,
955 &fops_scan_count);
956 if (!ar->spectral.scan_count) {
957 ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
958 ar->pdev_idx);
959 ret = -EINVAL;
960 goto debug_unregister;
961 }
962
963 ar->spectral.scan_bins = debugfs_create_file("spectral_bins",
964 0600,
965 ar->debug.debugfs_pdev, ar,
966 &fops_scan_bins);
967 if (!ar->spectral.scan_bins) {
968 ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
969 ar->pdev_idx);
970 ret = -EINVAL;
971 goto debug_unregister;
972 }
973
974 return 0;
975
976 debug_unregister:
977 ath11k_spectral_debug_unregister(ar);
978 return ret;
979 }
980
ath11k_spectral_init(struct ath11k_base * ab)981 int ath11k_spectral_init(struct ath11k_base *ab)
982 {
983 struct ath11k *ar;
984 struct ath11k_spectral *sp;
985 struct ath11k_dbring_cap db_cap;
986 int ret;
987 int i;
988
989 if (!test_bit(WMI_TLV_SERVICE_FREQINFO_IN_METADATA,
990 ab->wmi_ab.svc_map))
991 return 0;
992
993 if (!ab->hw_params.spectral.fft_sz)
994 return 0;
995
996 for (i = 0; i < ab->num_radios; i++) {
997 ar = ab->pdevs[i].ar;
998 sp = &ar->spectral;
999
1000 ret = ath11k_dbring_get_cap(ar->ab, ar->pdev_idx,
1001 WMI_DIRECT_BUF_SPECTRAL,
1002 &db_cap);
1003 if (ret)
1004 continue;
1005
1006 idr_init(&sp->rx_ring.bufs_idr);
1007 spin_lock_init(&sp->rx_ring.idr_lock);
1008 spin_lock_init(&sp->lock);
1009
1010 ret = ath11k_spectral_ring_alloc(ar, &db_cap);
1011 if (ret) {
1012 ath11k_warn(ab, "failed to init spectral ring for pdev %d\n",
1013 i);
1014 goto deinit;
1015 }
1016
1017 spin_lock_bh(&sp->lock);
1018
1019 sp->mode = ATH11K_SPECTRAL_DISABLED;
1020 sp->count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
1021 sp->fft_size = ATH11K_WMI_SPECTRAL_FFT_SIZE_DEFAULT;
1022 sp->enabled = true;
1023
1024 spin_unlock_bh(&sp->lock);
1025
1026 ret = ath11k_spectral_debug_register(ar);
1027 if (ret) {
1028 ath11k_warn(ab, "failed to register spectral for pdev %d\n",
1029 i);
1030 goto deinit;
1031 }
1032 }
1033
1034 return 0;
1035
1036 deinit:
1037 ath11k_spectral_deinit(ab);
1038 return ret;
1039 }
1040
ath11k_spectral_get_mode(struct ath11k * ar)1041 enum ath11k_spectral_mode ath11k_spectral_get_mode(struct ath11k *ar)
1042 {
1043 if (ar->spectral.enabled)
1044 return ar->spectral.mode;
1045 else
1046 return ATH11K_SPECTRAL_DISABLED;
1047 }
1048
ath11k_spectral_get_dbring(struct ath11k * ar)1049 struct ath11k_dbring *ath11k_spectral_get_dbring(struct ath11k *ar)
1050 {
1051 if (ar->spectral.enabled)
1052 return &ar->spectral.rx_ring;
1053 else
1054 return NULL;
1055 }
1056