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