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 #define ATH11K_SPECTRAL_160MHZ			160
34 
35 #define ATH11K_SPECTRAL_SIGNATURE		0xFA
36 
37 #define ATH11K_SPECTRAL_TAG_RADAR_SUMMARY	0x0
38 #define ATH11K_SPECTRAL_TAG_RADAR_FFT		0x1
39 #define ATH11K_SPECTRAL_TAG_SCAN_SUMMARY	0x2
40 #define ATH11K_SPECTRAL_TAG_SCAN_SEARCH		0x3
41 
42 #define SPECTRAL_TLV_HDR_LEN				GENMASK(15, 0)
43 #define SPECTRAL_TLV_HDR_TAG				GENMASK(23, 16)
44 #define SPECTRAL_TLV_HDR_SIGN				GENMASK(31, 24)
45 
46 #define SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN		GENMASK(7, 0)
47 #define SPECTRAL_SUMMARY_INFO0_OB_FLAG			BIT(8)
48 #define SPECTRAL_SUMMARY_INFO0_GRP_IDX			GENMASK(16, 9)
49 #define SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT		BIT(17)
50 #define SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB		GENMASK(27, 18)
51 #define SPECTRAL_SUMMARY_INFO0_FALSE_SCAN		BIT(28)
52 #define SPECTRAL_SUMMARY_INFO0_DETECTOR_ID		GENMASK(30, 29)
53 #define SPECTRAL_SUMMARY_INFO0_PRI80			BIT(31)
54 
55 #define SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX		GENMASK(11, 0)
56 #define SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE		GENMASK(21, 12)
57 #define SPECTRAL_SUMMARY_INFO2_NARROWBAND_MASK		GENMASK(29, 22)
58 #define SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE		BIT(30)
59 
60 struct spectral_tlv {
61 	__le32 timestamp;
62 	__le32 header;
63 } __packed;
64 
65 struct spectral_summary_fft_report {
66 	__le32 timestamp;
67 	__le32 tlv_header;
68 	__le32 info0;
69 	__le32 reserve0;
70 	__le32 info2;
71 	__le32 reserve1;
72 } __packed;
73 
74 struct ath11k_spectral_summary_report {
75 	struct wmi_dma_buf_release_meta_data meta;
76 	u32 timestamp;
77 	u8 agc_total_gain;
78 	u8 grp_idx;
79 	u16 inb_pwr_db;
80 	s16 peak_idx;
81 	u16 peak_mag;
82 	u8 detector_id;
83 	bool out_of_band_flag;
84 	bool rf_saturation;
85 	bool primary80;
86 	bool gain_change;
87 	bool false_scan;
88 };
89 
90 #define SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID		GENMASK(1, 0)
91 #define SPECTRAL_FFT_REPORT_INFO0_FFT_NUM		GENMASK(4, 2)
92 #define SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK		GENMASK(16, 5)
93 #define SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX	GENMASK(27, 17)
94 #define SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX		GENMASK(30, 28)
95 
96 #define SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB		GENMASK(8, 0)
97 #define SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB		GENMASK(16, 9)
98 
99 #define SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS	GENMASK(7, 0)
100 #define SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE	GENMASK(17, 8)
101 #define SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB		GENMASK(24, 18)
102 #define SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB		GENMASK(31, 25)
103 
104 struct spectral_search_fft_report {
105 	__le32 timestamp;
106 	__le32 tlv_header;
107 	__le32 info0;
108 	__le32 info1;
109 	__le32 info2;
110 	__le32 reserve0;
111 	u8 bins[];
112 } __packed;
113 
114 struct ath11k_spectral_search_report {
115 	u32 timestamp;
116 	u8 detector_id;
117 	u8 fft_count;
118 	u16 radar_check;
119 	s16 peak_idx;
120 	u8 chain_idx;
121 	u16 base_pwr_db;
122 	u8 total_gain_db;
123 	u8 strong_bin_count;
124 	u16 peak_mag;
125 	u8 avg_pwr_db;
126 	u8 rel_pwr_db;
127 };
128 
create_buf_file_handler(const char * filename,struct dentry * parent,umode_t mode,struct rchan_buf * buf,int * is_global)129 static struct dentry *create_buf_file_handler(const char *filename,
130 					      struct dentry *parent,
131 					      umode_t mode,
132 					      struct rchan_buf *buf,
133 					      int *is_global)
134 {
135 	struct dentry *buf_file;
136 
137 	buf_file = debugfs_create_file(filename, mode, parent, buf,
138 				       &relay_file_operations);
139 	*is_global = 1;
140 	return buf_file;
141 }
142 
remove_buf_file_handler(struct dentry * dentry)143 static int remove_buf_file_handler(struct dentry *dentry)
144 {
145 	debugfs_remove(dentry);
146 
147 	return 0;
148 }
149 
150 static const struct rchan_callbacks rfs_scan_cb = {
151 	.create_buf_file = create_buf_file_handler,
152 	.remove_buf_file = remove_buf_file_handler,
153 };
154 
ath11k_spectral_get_vdev(struct ath11k * ar)155 static struct ath11k_vif *ath11k_spectral_get_vdev(struct ath11k *ar)
156 {
157 	struct ath11k_vif *arvif;
158 
159 	lockdep_assert_held(&ar->conf_mutex);
160 
161 	if (list_empty(&ar->arvifs))
162 		return NULL;
163 
164 	/* if there already is a vif doing spectral, return that. */
165 	list_for_each_entry(arvif, &ar->arvifs, list)
166 		if (arvif->spectral_enabled)
167 			return arvif;
168 
169 	/* otherwise, return the first vif. */
170 	return list_first_entry(&ar->arvifs, typeof(*arvif), list);
171 }
172 
ath11k_spectral_scan_trigger(struct ath11k * ar)173 static int ath11k_spectral_scan_trigger(struct ath11k *ar)
174 {
175 	struct ath11k_vif *arvif;
176 	int ret;
177 
178 	lockdep_assert_held(&ar->conf_mutex);
179 
180 	arvif = ath11k_spectral_get_vdev(ar);
181 	if (!arvif)
182 		return -ENODEV;
183 
184 	if (ar->spectral.mode == ATH11K_SPECTRAL_DISABLED)
185 		return 0;
186 
187 	ar->spectral.is_primary = true;
188 
189 	ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
190 					      ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
191 					      ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
192 	if (ret)
193 		return ret;
194 
195 	ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
196 					      ATH11K_WMI_SPECTRAL_TRIGGER_CMD_TRIGGER,
197 					      ATH11K_WMI_SPECTRAL_ENABLE_CMD_ENABLE);
198 	if (ret)
199 		return ret;
200 
201 	return 0;
202 }
203 
ath11k_spectral_scan_config(struct ath11k * ar,enum ath11k_spectral_mode mode)204 static int ath11k_spectral_scan_config(struct ath11k *ar,
205 				       enum ath11k_spectral_mode mode)
206 {
207 	struct ath11k_wmi_vdev_spectral_conf_param param = { 0 };
208 	struct ath11k_vif *arvif;
209 	int ret, count;
210 
211 	lockdep_assert_held(&ar->conf_mutex);
212 
213 	arvif = ath11k_spectral_get_vdev(ar);
214 	if (!arvif)
215 		return -ENODEV;
216 
217 	arvif->spectral_enabled = (mode != ATH11K_SPECTRAL_DISABLED);
218 
219 	spin_lock_bh(&ar->spectral.lock);
220 	ar->spectral.mode = mode;
221 	spin_unlock_bh(&ar->spectral.lock);
222 
223 	ret = ath11k_wmi_vdev_spectral_enable(ar, arvif->vdev_id,
224 					      ATH11K_WMI_SPECTRAL_TRIGGER_CMD_CLEAR,
225 					      ATH11K_WMI_SPECTRAL_ENABLE_CMD_DISABLE);
226 	if (ret) {
227 		ath11k_warn(ar->ab, "failed to enable spectral scan: %d\n", ret);
228 		return ret;
229 	}
230 
231 	if (mode == ATH11K_SPECTRAL_DISABLED)
232 		return 0;
233 
234 	if (mode == ATH11K_SPECTRAL_BACKGROUND)
235 		count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
236 	else
237 		count = max_t(u16, 1, ar->spectral.count);
238 
239 	param.vdev_id = arvif->vdev_id;
240 	param.scan_count = count;
241 	param.scan_fft_size = ar->spectral.fft_size;
242 	param.scan_period = ATH11K_WMI_SPECTRAL_PERIOD_DEFAULT;
243 	param.scan_priority = ATH11K_WMI_SPECTRAL_PRIORITY_DEFAULT;
244 	param.scan_gc_ena = ATH11K_WMI_SPECTRAL_GC_ENA_DEFAULT;
245 	param.scan_restart_ena = ATH11K_WMI_SPECTRAL_RESTART_ENA_DEFAULT;
246 	param.scan_noise_floor_ref = ATH11K_WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT;
247 	param.scan_init_delay = ATH11K_WMI_SPECTRAL_INIT_DELAY_DEFAULT;
248 	param.scan_nb_tone_thr = ATH11K_WMI_SPECTRAL_NB_TONE_THR_DEFAULT;
249 	param.scan_str_bin_thr = ATH11K_WMI_SPECTRAL_STR_BIN_THR_DEFAULT;
250 	param.scan_wb_rpt_mode = ATH11K_WMI_SPECTRAL_WB_RPT_MODE_DEFAULT;
251 	param.scan_rssi_rpt_mode = ATH11K_WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT;
252 	param.scan_rssi_thr = ATH11K_WMI_SPECTRAL_RSSI_THR_DEFAULT;
253 	param.scan_pwr_format = ATH11K_WMI_SPECTRAL_PWR_FORMAT_DEFAULT;
254 	param.scan_rpt_mode = ATH11K_WMI_SPECTRAL_RPT_MODE_DEFAULT;
255 	param.scan_bin_scale = ATH11K_WMI_SPECTRAL_BIN_SCALE_DEFAULT;
256 	param.scan_dbm_adj = ATH11K_WMI_SPECTRAL_DBM_ADJ_DEFAULT;
257 	param.scan_chn_mask = ATH11K_WMI_SPECTRAL_CHN_MASK_DEFAULT;
258 
259 	ret = ath11k_wmi_vdev_spectral_conf(ar, &param);
260 	if (ret) {
261 		ath11k_warn(ar->ab, "failed to configure spectral scan: %d\n", ret);
262 		return ret;
263 	}
264 
265 	return 0;
266 }
267 
ath11k_read_file_spec_scan_ctl(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)268 static ssize_t ath11k_read_file_spec_scan_ctl(struct file *file,
269 					      char __user *user_buf,
270 					      size_t count, loff_t *ppos)
271 {
272 	struct ath11k *ar = file->private_data;
273 	char *mode = "";
274 	size_t len;
275 	enum ath11k_spectral_mode spectral_mode;
276 
277 	mutex_lock(&ar->conf_mutex);
278 	spectral_mode = ar->spectral.mode;
279 	mutex_unlock(&ar->conf_mutex);
280 
281 	switch (spectral_mode) {
282 	case ATH11K_SPECTRAL_DISABLED:
283 		mode = "disable";
284 		break;
285 	case ATH11K_SPECTRAL_BACKGROUND:
286 		mode = "background";
287 		break;
288 	case ATH11K_SPECTRAL_MANUAL:
289 		mode = "manual";
290 		break;
291 	}
292 
293 	len = strlen(mode);
294 	return simple_read_from_buffer(user_buf, count, ppos, mode, len);
295 }
296 
ath11k_write_file_spec_scan_ctl(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)297 static ssize_t ath11k_write_file_spec_scan_ctl(struct file *file,
298 					       const char __user *user_buf,
299 					       size_t count, loff_t *ppos)
300 {
301 	struct ath11k *ar = file->private_data;
302 	char buf[32];
303 	ssize_t len;
304 	int ret;
305 
306 	len = min(count, sizeof(buf) - 1);
307 	if (copy_from_user(buf, user_buf, len))
308 		return -EFAULT;
309 
310 	buf[len] = '\0';
311 
312 	mutex_lock(&ar->conf_mutex);
313 
314 	if (strncmp("trigger", buf, 7) == 0) {
315 		if (ar->spectral.mode == ATH11K_SPECTRAL_MANUAL ||
316 		    ar->spectral.mode == ATH11K_SPECTRAL_BACKGROUND) {
317 			/* reset the configuration to adopt possibly changed
318 			 * debugfs parameters
319 			 */
320 			ret = ath11k_spectral_scan_config(ar, ar->spectral.mode);
321 			if (ret) {
322 				ath11k_warn(ar->ab, "failed to reconfigure spectral scan: %d\n",
323 					    ret);
324 				goto unlock;
325 			}
326 
327 			ret = ath11k_spectral_scan_trigger(ar);
328 			if (ret) {
329 				ath11k_warn(ar->ab, "failed to trigger spectral scan: %d\n",
330 					    ret);
331 			}
332 		} else {
333 			ret = -EINVAL;
334 		}
335 	} else if (strncmp("background", buf, 10) == 0) {
336 		ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_BACKGROUND);
337 	} else if (strncmp("manual", buf, 6) == 0) {
338 		ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_MANUAL);
339 	} else if (strncmp("disable", buf, 7) == 0) {
340 		ret = ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
341 	} else {
342 		ret = -EINVAL;
343 	}
344 
345 unlock:
346 	mutex_unlock(&ar->conf_mutex);
347 
348 	if (ret)
349 		return ret;
350 
351 	return count;
352 }
353 
354 static const struct file_operations fops_scan_ctl = {
355 	.read = ath11k_read_file_spec_scan_ctl,
356 	.write = ath11k_write_file_spec_scan_ctl,
357 	.open = simple_open,
358 	.owner = THIS_MODULE,
359 	.llseek = default_llseek,
360 };
361 
ath11k_read_file_spectral_count(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)362 static ssize_t ath11k_read_file_spectral_count(struct file *file,
363 					       char __user *user_buf,
364 					       size_t count, loff_t *ppos)
365 {
366 	struct ath11k *ar = file->private_data;
367 	char buf[32];
368 	size_t len;
369 	u16 spectral_count;
370 
371 	mutex_lock(&ar->conf_mutex);
372 	spectral_count = ar->spectral.count;
373 	mutex_unlock(&ar->conf_mutex);
374 
375 	len = sprintf(buf, "%d\n", spectral_count);
376 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
377 }
378 
ath11k_write_file_spectral_count(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)379 static ssize_t ath11k_write_file_spectral_count(struct file *file,
380 						const char __user *user_buf,
381 						size_t count, loff_t *ppos)
382 {
383 	struct ath11k *ar = file->private_data;
384 	unsigned long val;
385 	char buf[32];
386 	ssize_t len;
387 
388 	len = min(count, sizeof(buf) - 1);
389 	if (copy_from_user(buf, user_buf, len))
390 		return -EFAULT;
391 
392 	buf[len] = '\0';
393 	if (kstrtoul(buf, 0, &val))
394 		return -EINVAL;
395 
396 	if (val > ATH11K_SPECTRAL_SCAN_COUNT_MAX)
397 		return -EINVAL;
398 
399 	mutex_lock(&ar->conf_mutex);
400 	ar->spectral.count = val;
401 	mutex_unlock(&ar->conf_mutex);
402 
403 	return count;
404 }
405 
406 static const struct file_operations fops_scan_count = {
407 	.read = ath11k_read_file_spectral_count,
408 	.write = ath11k_write_file_spectral_count,
409 	.open = simple_open,
410 	.owner = THIS_MODULE,
411 	.llseek = default_llseek,
412 };
413 
ath11k_read_file_spectral_bins(struct file * file,char __user * user_buf,size_t count,loff_t * ppos)414 static ssize_t ath11k_read_file_spectral_bins(struct file *file,
415 					      char __user *user_buf,
416 					      size_t count, loff_t *ppos)
417 {
418 	struct ath11k *ar = file->private_data;
419 	char buf[32];
420 	unsigned int bins, fft_size;
421 	size_t len;
422 
423 	mutex_lock(&ar->conf_mutex);
424 
425 	fft_size = ar->spectral.fft_size;
426 	bins = 1 << fft_size;
427 
428 	mutex_unlock(&ar->conf_mutex);
429 
430 	len = sprintf(buf, "%d\n", bins);
431 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
432 }
433 
ath11k_write_file_spectral_bins(struct file * file,const char __user * user_buf,size_t count,loff_t * ppos)434 static ssize_t ath11k_write_file_spectral_bins(struct file *file,
435 					       const char __user *user_buf,
436 					       size_t count, loff_t *ppos)
437 {
438 	struct ath11k *ar = file->private_data;
439 	unsigned long val;
440 	char buf[32];
441 	ssize_t len;
442 
443 	len = min(count, sizeof(buf) - 1);
444 	if (copy_from_user(buf, user_buf, len))
445 		return -EFAULT;
446 
447 	buf[len] = '\0';
448 	if (kstrtoul(buf, 0, &val))
449 		return -EINVAL;
450 
451 	if (val < ATH11K_SPECTRAL_MIN_BINS ||
452 	    val > ar->ab->hw_params.spectral.max_fft_bins)
453 		return -EINVAL;
454 
455 	if (!is_power_of_2(val))
456 		return -EINVAL;
457 
458 	mutex_lock(&ar->conf_mutex);
459 	ar->spectral.fft_size = ilog2(val);
460 	mutex_unlock(&ar->conf_mutex);
461 
462 	return count;
463 }
464 
465 static const struct file_operations fops_scan_bins = {
466 	.read = ath11k_read_file_spectral_bins,
467 	.write = ath11k_write_file_spectral_bins,
468 	.open = simple_open,
469 	.owner = THIS_MODULE,
470 	.llseek = default_llseek,
471 };
472 
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)473 static int ath11k_spectral_pull_summary(struct ath11k *ar,
474 					struct wmi_dma_buf_release_meta_data *meta,
475 					struct spectral_summary_fft_report *summary,
476 					struct ath11k_spectral_summary_report *report)
477 {
478 	report->timestamp = __le32_to_cpu(summary->timestamp);
479 	report->agc_total_gain = FIELD_GET(SPECTRAL_SUMMARY_INFO0_AGC_TOTAL_GAIN,
480 					   __le32_to_cpu(summary->info0));
481 	report->out_of_band_flag = FIELD_GET(SPECTRAL_SUMMARY_INFO0_OB_FLAG,
482 					     __le32_to_cpu(summary->info0));
483 	report->grp_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO0_GRP_IDX,
484 				    __le32_to_cpu(summary->info0));
485 	report->rf_saturation = FIELD_GET(SPECTRAL_SUMMARY_INFO0_RECENT_RFSAT,
486 					  __le32_to_cpu(summary->info0));
487 	report->inb_pwr_db = FIELD_GET(SPECTRAL_SUMMARY_INFO0_INBAND_PWR_DB,
488 				       __le32_to_cpu(summary->info0));
489 	report->false_scan = FIELD_GET(SPECTRAL_SUMMARY_INFO0_FALSE_SCAN,
490 				       __le32_to_cpu(summary->info0));
491 	report->detector_id = FIELD_GET(SPECTRAL_SUMMARY_INFO0_DETECTOR_ID,
492 					__le32_to_cpu(summary->info0));
493 	report->primary80 = FIELD_GET(SPECTRAL_SUMMARY_INFO0_PRI80,
494 				      __le32_to_cpu(summary->info0));
495 	report->peak_idx = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_SIGNED_IDX,
496 				     __le32_to_cpu(summary->info2));
497 	report->peak_mag = FIELD_GET(SPECTRAL_SUMMARY_INFO2_PEAK_MAGNITUDE,
498 				     __le32_to_cpu(summary->info2));
499 	report->gain_change = FIELD_GET(SPECTRAL_SUMMARY_INFO2_GAIN_CHANGE,
500 					__le32_to_cpu(summary->info2));
501 
502 	memcpy(&report->meta, meta, sizeof(*meta));
503 
504 	return 0;
505 }
506 
ath11k_spectral_pull_search(struct ath11k * ar,struct spectral_search_fft_report * search,struct ath11k_spectral_search_report * report)507 static int ath11k_spectral_pull_search(struct ath11k *ar,
508 				       struct spectral_search_fft_report *search,
509 				       struct ath11k_spectral_search_report *report)
510 {
511 	report->timestamp = __le32_to_cpu(search->timestamp);
512 	report->detector_id = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_DETECTOR_ID,
513 					__le32_to_cpu(search->info0));
514 	report->fft_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_FFT_NUM,
515 				      __le32_to_cpu(search->info0));
516 	report->radar_check = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_RADAR_CHECK,
517 					__le32_to_cpu(search->info0));
518 	report->peak_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
519 				     __le32_to_cpu(search->info0));
520 	report->chain_idx = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_CHAIN_IDX,
521 				      __le32_to_cpu(search->info0));
522 	report->base_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_BASE_PWR_DB,
523 					__le32_to_cpu(search->info1));
524 	report->total_gain_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO1_TOTAL_GAIN_DB,
525 					  __le32_to_cpu(search->info1));
526 	report->strong_bin_count = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_NUM_STRONG_BINS,
527 					     __le32_to_cpu(search->info2));
528 	report->peak_mag = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_PEAK_MAGNITUDE,
529 				     __le32_to_cpu(search->info2));
530 	report->avg_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_AVG_PWR_DB,
531 				       __le32_to_cpu(search->info2));
532 	report->rel_pwr_db = FIELD_GET(SPECTRAL_FFT_REPORT_INFO2_REL_PWR_DB,
533 				       __le32_to_cpu(search->info2));
534 
535 	return 0;
536 }
537 
ath11k_spectral_get_max_exp(s8 max_index,u8 max_magnitude,int bin_len,u8 * bins)538 static u8 ath11k_spectral_get_max_exp(s8 max_index, u8 max_magnitude,
539 				      int bin_len, u8 *bins)
540 {
541 	int dc_pos;
542 	u8 max_exp;
543 
544 	dc_pos = bin_len / 2;
545 
546 	/* peak index outside of bins */
547 	if (dc_pos <= max_index || -dc_pos >= max_index)
548 		return 0;
549 
550 	for (max_exp = 0; max_exp < 8; max_exp++) {
551 		if (bins[dc_pos + max_index] == (max_magnitude >> max_exp))
552 			break;
553 	}
554 
555 	/* max_exp not found */
556 	if (bins[dc_pos + max_index] != (max_magnitude >> max_exp))
557 		return 0;
558 
559 	return max_exp;
560 }
561 
ath11k_spectral_parse_fft(u8 * outbins,u8 * inbins,int num_bins,u8 fft_sz)562 static void ath11k_spectral_parse_fft(u8 *outbins, u8 *inbins, int num_bins, u8 fft_sz)
563 {
564 	int i, j;
565 
566 	i = 0;
567 	j = 0;
568 	while (i < num_bins) {
569 		outbins[i] = inbins[j];
570 		i++;
571 		j += fft_sz;
572 	}
573 }
574 
575 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)576 int ath11k_spectral_process_fft(struct ath11k *ar,
577 				struct ath11k_spectral_summary_report *summary,
578 				void *data,
579 				struct fft_sample_ath11k *fft_sample,
580 				u32 data_len)
581 {
582 	struct ath11k_base *ab = ar->ab;
583 	struct spectral_search_fft_report *fft_report = data;
584 	struct ath11k_spectral_search_report search;
585 	struct spectral_tlv *tlv;
586 	int tlv_len, bin_len, num_bins;
587 	u16 length, freq;
588 	u8 chan_width_mhz, bin_sz;
589 	int ret;
590 	u32 check_length;
591 	bool fragment_sample = false;
592 
593 	lockdep_assert_held(&ar->spectral.lock);
594 
595 	if (!ab->hw_params.spectral.fft_sz) {
596 		ath11k_warn(ab, "invalid bin size type for hw rev %d\n",
597 			    ab->hw_rev);
598 		return -EINVAL;
599 	}
600 
601 	tlv = (struct spectral_tlv *)data;
602 	tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN, __le32_to_cpu(tlv->header));
603 	/* convert Dword into bytes */
604 	tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
605 	bin_len = tlv_len - ab->hw_params.spectral.fft_hdr_len;
606 
607 	if (data_len < (bin_len + sizeof(*fft_report))) {
608 		ath11k_warn(ab, "mismatch in expected bin len %d and data len %d\n",
609 			    bin_len, data_len);
610 		return -EINVAL;
611 	}
612 
613 	bin_sz = ab->hw_params.spectral.fft_sz + ab->hw_params.spectral.fft_pad_sz;
614 	num_bins = bin_len / bin_sz;
615 	/* Only In-band bins are useful to user for visualize */
616 	num_bins >>= 1;
617 
618 	if (num_bins < ATH11K_SPECTRAL_MIN_IB_BINS ||
619 	    num_bins > ATH11K_SPECTRAL_MAX_IB_BINS(ab) ||
620 	    !is_power_of_2(num_bins)) {
621 		ath11k_warn(ab, "Invalid num of bins %d\n", num_bins);
622 		return -EINVAL;
623 	}
624 
625 	check_length = sizeof(*fft_report) + (num_bins * ab->hw_params.spectral.fft_sz);
626 	ret = ath11k_dbring_validate_buffer(ar, data, check_length);
627 	if (ret) {
628 		ath11k_warn(ar->ab, "found magic value in fft data, dropping\n");
629 		return ret;
630 	}
631 
632 	ret = ath11k_spectral_pull_search(ar, data, &search);
633 	if (ret) {
634 		ath11k_warn(ab, "failed to pull search report %d\n", ret);
635 		return ret;
636 	}
637 
638 	chan_width_mhz = summary->meta.ch_width;
639 
640 	switch (chan_width_mhz) {
641 	case ATH11K_SPECTRAL_20MHZ:
642 	case ATH11K_SPECTRAL_40MHZ:
643 	case ATH11K_SPECTRAL_80MHZ:
644 		fft_sample->chan_width_mhz = chan_width_mhz;
645 		break;
646 	case ATH11K_SPECTRAL_160MHZ:
647 		if (ab->hw_params.spectral.fragment_160mhz) {
648 			chan_width_mhz /= 2;
649 			fragment_sample = true;
650 		}
651 		fft_sample->chan_width_mhz = chan_width_mhz;
652 		break;
653 	default:
654 		ath11k_warn(ab, "invalid channel width %d\n", chan_width_mhz);
655 		return -EINVAL;
656 	}
657 
658 	length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + num_bins;
659 	fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH11K;
660 	fft_sample->tlv.length = __cpu_to_be16(length);
661 
662 	fft_sample->tsf = __cpu_to_be32(search.timestamp);
663 	fft_sample->max_magnitude = __cpu_to_be16(search.peak_mag);
664 	fft_sample->max_index = FIELD_GET(SPECTRAL_FFT_REPORT_INFO0_PEAK_SIGNED_IDX,
665 					  __le32_to_cpu(fft_report->info0));
666 
667 	summary->inb_pwr_db >>= 1;
668 	fft_sample->rssi = __cpu_to_be16(summary->inb_pwr_db);
669 	fft_sample->noise = __cpu_to_be32(summary->meta.noise_floor[search.chain_idx]);
670 
671 	freq = summary->meta.freq1;
672 	fft_sample->freq1 = __cpu_to_be16(freq);
673 
674 	freq = summary->meta.freq2;
675 	fft_sample->freq2 = __cpu_to_be16(freq);
676 
677 	/* If freq2 is available then the spectral scan results are fragmented
678 	 * as primary and secondary
679 	 */
680 	if (fragment_sample && freq) {
681 		if (!ar->spectral.is_primary)
682 			fft_sample->freq1 = cpu_to_be16(freq);
683 
684 		/* We have to toggle the is_primary to handle the next report */
685 		ar->spectral.is_primary = !ar->spectral.is_primary;
686 	}
687 
688 	ath11k_spectral_parse_fft(fft_sample->data, fft_report->bins, num_bins,
689 				  ab->hw_params.spectral.fft_sz);
690 
691 	fft_sample->max_exp = ath11k_spectral_get_max_exp(fft_sample->max_index,
692 							  search.peak_mag,
693 							  num_bins,
694 							  fft_sample->data);
695 
696 	if (ar->spectral.rfs_scan)
697 		relay_write(ar->spectral.rfs_scan, fft_sample,
698 			    length + sizeof(struct fft_sample_tlv));
699 
700 	return 0;
701 }
702 
ath11k_spectral_process_data(struct ath11k * ar,struct ath11k_dbring_data * param)703 static int ath11k_spectral_process_data(struct ath11k *ar,
704 					struct ath11k_dbring_data *param)
705 {
706 	struct ath11k_base *ab = ar->ab;
707 	struct spectral_tlv *tlv;
708 	struct spectral_summary_fft_report *summary = NULL;
709 	struct ath11k_spectral_summary_report summ_rpt;
710 	struct fft_sample_ath11k *fft_sample = NULL;
711 	u8 *data;
712 	u32 data_len, i;
713 	u8 sign, tag;
714 	int tlv_len, sample_sz;
715 	int ret;
716 	bool quit = false;
717 
718 	spin_lock_bh(&ar->spectral.lock);
719 
720 	if (!ar->spectral.enabled) {
721 		ret = -EINVAL;
722 		goto unlock;
723 	}
724 
725 	sample_sz = sizeof(*fft_sample) + ATH11K_SPECTRAL_MAX_IB_BINS(ab);
726 	fft_sample = kmalloc(sample_sz, GFP_ATOMIC);
727 	if (!fft_sample) {
728 		ret = -ENOBUFS;
729 		goto unlock;
730 	}
731 
732 	data = param->data;
733 	data_len = param->data_sz;
734 	i = 0;
735 	while (!quit && (i < data_len)) {
736 		if ((i + sizeof(*tlv)) > data_len) {
737 			ath11k_warn(ab, "failed to parse spectral tlv hdr at bytes %d\n",
738 				    i);
739 			ret = -EINVAL;
740 			goto err;
741 		}
742 
743 		tlv = (struct spectral_tlv *)&data[i];
744 		sign = FIELD_GET(SPECTRAL_TLV_HDR_SIGN,
745 				 __le32_to_cpu(tlv->header));
746 		if (sign != ATH11K_SPECTRAL_SIGNATURE) {
747 			ath11k_warn(ab, "Invalid sign 0x%x at bytes %d\n",
748 				    sign, i);
749 			ret = -EINVAL;
750 			goto err;
751 		}
752 
753 		tlv_len = FIELD_GET(SPECTRAL_TLV_HDR_LEN,
754 				    __le32_to_cpu(tlv->header));
755 		/* convert Dword into bytes */
756 		tlv_len *= ATH11K_SPECTRAL_DWORD_SIZE;
757 		if ((i + sizeof(*tlv) + tlv_len) > data_len) {
758 			ath11k_warn(ab, "failed to parse spectral tlv payload at bytes %d tlv_len:%d data_len:%d\n",
759 				    i, tlv_len, data_len);
760 			ret = -EINVAL;
761 			goto err;
762 		}
763 
764 		tag = FIELD_GET(SPECTRAL_TLV_HDR_TAG,
765 				__le32_to_cpu(tlv->header));
766 		switch (tag) {
767 		case ATH11K_SPECTRAL_TAG_SCAN_SUMMARY:
768 			/* HW bug in tlv length of summary report,
769 			 * HW report 3 DWORD size but the data payload
770 			 * is 4 DWORD size (16 bytes).
771 			 * Need to remove this workaround once HW bug fixed
772 			 */
773 			tlv_len = sizeof(*summary) - sizeof(*tlv) +
774 				  ab->hw_params.spectral.summary_pad_sz;
775 
776 			if (tlv_len < (sizeof(*summary) - sizeof(*tlv))) {
777 				ath11k_warn(ab, "failed to parse spectral summary at bytes %d tlv_len:%d\n",
778 					    i, tlv_len);
779 				ret = -EINVAL;
780 				goto err;
781 			}
782 
783 			ret = ath11k_dbring_validate_buffer(ar, data, tlv_len);
784 			if (ret) {
785 				ath11k_warn(ar->ab, "found magic value in spectral summary, dropping\n");
786 				goto err;
787 			}
788 
789 			summary = (struct spectral_summary_fft_report *)tlv;
790 			ath11k_spectral_pull_summary(ar, &param->meta,
791 						     summary, &summ_rpt);
792 			break;
793 		case ATH11K_SPECTRAL_TAG_SCAN_SEARCH:
794 			if (tlv_len < (sizeof(struct spectral_search_fft_report) -
795 				       sizeof(*tlv))) {
796 				ath11k_warn(ab, "failed to parse spectral search fft at bytes %d\n",
797 					    i);
798 				ret = -EINVAL;
799 				goto err;
800 			}
801 
802 			memset(fft_sample, 0, sample_sz);
803 			ret = ath11k_spectral_process_fft(ar, &summ_rpt, tlv,
804 							  fft_sample,
805 							  data_len - i);
806 			if (ret) {
807 				ath11k_warn(ab, "failed to process spectral fft at bytes %d\n",
808 					    i);
809 				goto err;
810 			}
811 			quit = true;
812 			break;
813 		}
814 
815 		i += sizeof(*tlv) + tlv_len;
816 	}
817 
818 	ret = 0;
819 
820 err:
821 	kfree(fft_sample);
822 unlock:
823 	spin_unlock_bh(&ar->spectral.lock);
824 	return ret;
825 }
826 
ath11k_spectral_ring_alloc(struct ath11k * ar,struct ath11k_dbring_cap * db_cap)827 static int ath11k_spectral_ring_alloc(struct ath11k *ar,
828 				      struct ath11k_dbring_cap *db_cap)
829 {
830 	struct ath11k_spectral *sp = &ar->spectral;
831 	int ret;
832 
833 	ret = ath11k_dbring_srng_setup(ar, &sp->rx_ring,
834 				       0, db_cap->min_elem);
835 	if (ret) {
836 		ath11k_warn(ar->ab, "failed to setup db ring\n");
837 		return ret;
838 	}
839 
840 	ath11k_dbring_set_cfg(ar, &sp->rx_ring,
841 			      ATH11K_SPECTRAL_NUM_RESP_PER_EVENT,
842 			      ATH11K_SPECTRAL_EVENT_TIMEOUT_MS,
843 			      ath11k_spectral_process_data);
844 
845 	ret = ath11k_dbring_buf_setup(ar, &sp->rx_ring, db_cap);
846 	if (ret) {
847 		ath11k_warn(ar->ab, "failed to setup db ring buffer\n");
848 		goto srng_cleanup;
849 	}
850 
851 	ret = ath11k_dbring_wmi_cfg_setup(ar, &sp->rx_ring,
852 					  WMI_DIRECT_BUF_SPECTRAL);
853 	if (ret) {
854 		ath11k_warn(ar->ab, "failed to setup db ring cfg\n");
855 		goto buffer_cleanup;
856 	}
857 
858 	return 0;
859 
860 buffer_cleanup:
861 	ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
862 srng_cleanup:
863 	ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
864 	return ret;
865 }
866 
ath11k_spectral_ring_free(struct ath11k * ar)867 static inline void ath11k_spectral_ring_free(struct ath11k *ar)
868 {
869 	struct ath11k_spectral *sp = &ar->spectral;
870 
871 	ath11k_dbring_srng_cleanup(ar, &sp->rx_ring);
872 	ath11k_dbring_buf_cleanup(ar, &sp->rx_ring);
873 }
874 
ath11k_spectral_debug_unregister(struct ath11k * ar)875 static inline void ath11k_spectral_debug_unregister(struct ath11k *ar)
876 {
877 	debugfs_remove(ar->spectral.scan_bins);
878 	ar->spectral.scan_bins = NULL;
879 
880 	debugfs_remove(ar->spectral.scan_count);
881 	ar->spectral.scan_count = NULL;
882 
883 	debugfs_remove(ar->spectral.scan_ctl);
884 	ar->spectral.scan_ctl = NULL;
885 
886 	if (ar->spectral.rfs_scan) {
887 		relay_close(ar->spectral.rfs_scan);
888 		ar->spectral.rfs_scan = NULL;
889 	}
890 }
891 
ath11k_spectral_vif_stop(struct ath11k_vif * arvif)892 int ath11k_spectral_vif_stop(struct ath11k_vif *arvif)
893 {
894 	if (!arvif->spectral_enabled)
895 		return 0;
896 
897 	return ath11k_spectral_scan_config(arvif->ar, ATH11K_SPECTRAL_DISABLED);
898 }
899 
ath11k_spectral_reset_buffer(struct ath11k * ar)900 void ath11k_spectral_reset_buffer(struct ath11k *ar)
901 {
902 	if (!ar->spectral.enabled)
903 		return;
904 
905 	if (ar->spectral.rfs_scan)
906 		relay_reset(ar->spectral.rfs_scan);
907 }
908 
ath11k_spectral_deinit(struct ath11k_base * ab)909 void ath11k_spectral_deinit(struct ath11k_base *ab)
910 {
911 	struct ath11k *ar;
912 	struct ath11k_spectral *sp;
913 	int i;
914 
915 	for (i = 0; i <  ab->num_radios; i++) {
916 		ar = ab->pdevs[i].ar;
917 		sp = &ar->spectral;
918 
919 		if (!sp->enabled)
920 			continue;
921 
922 		mutex_lock(&ar->conf_mutex);
923 		ath11k_spectral_scan_config(ar, ATH11K_SPECTRAL_DISABLED);
924 		mutex_unlock(&ar->conf_mutex);
925 
926 		spin_lock_bh(&sp->lock);
927 		sp->enabled = false;
928 		spin_unlock_bh(&sp->lock);
929 
930 		ath11k_spectral_debug_unregister(ar);
931 		ath11k_spectral_ring_free(ar);
932 	}
933 }
934 
ath11k_spectral_debug_register(struct ath11k * ar)935 static inline int ath11k_spectral_debug_register(struct ath11k *ar)
936 {
937 	int ret;
938 
939 	ar->spectral.rfs_scan = relay_open("spectral_scan",
940 					   ar->debug.debugfs_pdev,
941 					   ATH11K_SPECTRAL_SUB_BUFF_SIZE(ar->ab),
942 					   ATH11K_SPECTRAL_NUM_SUB_BUF,
943 					   &rfs_scan_cb, NULL);
944 	if (!ar->spectral.rfs_scan) {
945 		ath11k_warn(ar->ab, "failed to open relay in pdev %d\n",
946 			    ar->pdev_idx);
947 		return -EINVAL;
948 	}
949 
950 	ar->spectral.scan_ctl = debugfs_create_file("spectral_scan_ctl",
951 						    0600,
952 						    ar->debug.debugfs_pdev, ar,
953 						    &fops_scan_ctl);
954 	if (!ar->spectral.scan_ctl) {
955 		ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
956 			    ar->pdev_idx);
957 		ret = -EINVAL;
958 		goto debug_unregister;
959 	}
960 
961 	ar->spectral.scan_count = debugfs_create_file("spectral_count",
962 						      0600,
963 						      ar->debug.debugfs_pdev, ar,
964 						      &fops_scan_count);
965 	if (!ar->spectral.scan_count) {
966 		ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
967 			    ar->pdev_idx);
968 		ret = -EINVAL;
969 		goto debug_unregister;
970 	}
971 
972 	ar->spectral.scan_bins = debugfs_create_file("spectral_bins",
973 						     0600,
974 						     ar->debug.debugfs_pdev, ar,
975 						     &fops_scan_bins);
976 	if (!ar->spectral.scan_bins) {
977 		ath11k_warn(ar->ab, "failed to open debugfs in pdev %d\n",
978 			    ar->pdev_idx);
979 		ret = -EINVAL;
980 		goto debug_unregister;
981 	}
982 
983 	return 0;
984 
985 debug_unregister:
986 	ath11k_spectral_debug_unregister(ar);
987 	return ret;
988 }
989 
ath11k_spectral_init(struct ath11k_base * ab)990 int ath11k_spectral_init(struct ath11k_base *ab)
991 {
992 	struct ath11k *ar;
993 	struct ath11k_spectral *sp;
994 	struct ath11k_dbring_cap db_cap;
995 	int ret;
996 	int i;
997 
998 	if (!test_bit(WMI_TLV_SERVICE_FREQINFO_IN_METADATA,
999 		      ab->wmi_ab.svc_map))
1000 		return 0;
1001 
1002 	if (!ab->hw_params.spectral.fft_sz)
1003 		return 0;
1004 
1005 	for (i = 0; i < ab->num_radios; i++) {
1006 		ar = ab->pdevs[i].ar;
1007 		sp = &ar->spectral;
1008 
1009 		ret = ath11k_dbring_get_cap(ar->ab, ar->pdev_idx,
1010 					    WMI_DIRECT_BUF_SPECTRAL,
1011 					    &db_cap);
1012 		if (ret)
1013 			continue;
1014 
1015 		idr_init(&sp->rx_ring.bufs_idr);
1016 		spin_lock_init(&sp->rx_ring.idr_lock);
1017 		spin_lock_init(&sp->lock);
1018 
1019 		ret = ath11k_spectral_ring_alloc(ar, &db_cap);
1020 		if (ret) {
1021 			ath11k_warn(ab, "failed to init spectral ring for pdev %d\n",
1022 				    i);
1023 			goto deinit;
1024 		}
1025 
1026 		spin_lock_bh(&sp->lock);
1027 
1028 		sp->mode = ATH11K_SPECTRAL_DISABLED;
1029 		sp->count = ATH11K_WMI_SPECTRAL_COUNT_DEFAULT;
1030 		sp->fft_size = ATH11K_WMI_SPECTRAL_FFT_SIZE_DEFAULT;
1031 		sp->enabled = true;
1032 
1033 		spin_unlock_bh(&sp->lock);
1034 
1035 		ret = ath11k_spectral_debug_register(ar);
1036 		if (ret) {
1037 			ath11k_warn(ab, "failed to register spectral for pdev %d\n",
1038 				    i);
1039 			goto deinit;
1040 		}
1041 	}
1042 
1043 	return 0;
1044 
1045 deinit:
1046 	ath11k_spectral_deinit(ab);
1047 	return ret;
1048 }
1049 
ath11k_spectral_get_mode(struct ath11k * ar)1050 enum ath11k_spectral_mode ath11k_spectral_get_mode(struct ath11k *ar)
1051 {
1052 	if (ar->spectral.enabled)
1053 		return ar->spectral.mode;
1054 	else
1055 		return ATH11K_SPECTRAL_DISABLED;
1056 }
1057 
ath11k_spectral_get_dbring(struct ath11k * ar)1058 struct ath11k_dbring *ath11k_spectral_get_dbring(struct ath11k *ar)
1059 {
1060 	if (ar->spectral.enabled)
1061 		return &ar->spectral.rx_ring;
1062 	else
1063 		return NULL;
1064 }
1065