1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2020 Intel Corporation
4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
6  */
7 #include "mvm.h"
8 #include "debugfs.h"
9 
10 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
11 				 struct ieee80211_vif *vif,
12 				 enum iwl_dbgfs_pm_mask param, int val)
13 {
14 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
15 	struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
16 
17 	dbgfs_pm->mask |= param;
18 
19 	switch (param) {
20 	case MVM_DEBUGFS_PM_KEEP_ALIVE: {
21 		int dtimper = vif->bss_conf.dtim_period ?: 1;
22 		int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
23 
24 		IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
25 		if (val * MSEC_PER_SEC < 3 * dtimper_msec)
26 			IWL_WARN(mvm,
27 				 "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
28 				 val * MSEC_PER_SEC, 3 * dtimper_msec);
29 		dbgfs_pm->keep_alive_seconds = val;
30 		break;
31 	}
32 	case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
33 		IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
34 				val ? "enabled" : "disabled");
35 		dbgfs_pm->skip_over_dtim = val;
36 		break;
37 	case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
38 		IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
39 		dbgfs_pm->skip_dtim_periods = val;
40 		break;
41 	case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
42 		IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
43 		dbgfs_pm->rx_data_timeout = val;
44 		break;
45 	case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
46 		IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
47 		dbgfs_pm->tx_data_timeout = val;
48 		break;
49 	case MVM_DEBUGFS_PM_LPRX_ENA:
50 		IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
51 		dbgfs_pm->lprx_ena = val;
52 		break;
53 	case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
54 		IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
55 		dbgfs_pm->lprx_rssi_threshold = val;
56 		break;
57 	case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
58 		IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
59 		dbgfs_pm->snooze_ena = val;
60 		break;
61 	case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
62 		IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
63 		dbgfs_pm->uapsd_misbehaving = val;
64 		break;
65 	case MVM_DEBUGFS_PM_USE_PS_POLL:
66 		IWL_DEBUG_POWER(mvm, "use_ps_poll=%d\n", val);
67 		dbgfs_pm->use_ps_poll = val;
68 		break;
69 	}
70 }
71 
72 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
73 					 size_t count, loff_t *ppos)
74 {
75 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
76 	struct iwl_mvm *mvm = mvmvif->mvm;
77 	enum iwl_dbgfs_pm_mask param;
78 	int val, ret;
79 
80 	if (!strncmp("keep_alive=", buf, 11)) {
81 		if (sscanf(buf + 11, "%d", &val) != 1)
82 			return -EINVAL;
83 		param = MVM_DEBUGFS_PM_KEEP_ALIVE;
84 	} else if (!strncmp("skip_over_dtim=", buf, 15)) {
85 		if (sscanf(buf + 15, "%d", &val) != 1)
86 			return -EINVAL;
87 		param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
88 	} else if (!strncmp("skip_dtim_periods=", buf, 18)) {
89 		if (sscanf(buf + 18, "%d", &val) != 1)
90 			return -EINVAL;
91 		param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
92 	} else if (!strncmp("rx_data_timeout=", buf, 16)) {
93 		if (sscanf(buf + 16, "%d", &val) != 1)
94 			return -EINVAL;
95 		param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
96 	} else if (!strncmp("tx_data_timeout=", buf, 16)) {
97 		if (sscanf(buf + 16, "%d", &val) != 1)
98 			return -EINVAL;
99 		param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
100 	} else if (!strncmp("lprx=", buf, 5)) {
101 		if (sscanf(buf + 5, "%d", &val) != 1)
102 			return -EINVAL;
103 		param = MVM_DEBUGFS_PM_LPRX_ENA;
104 	} else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
105 		if (sscanf(buf + 20, "%d", &val) != 1)
106 			return -EINVAL;
107 		if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
108 		    POWER_LPRX_RSSI_THRESHOLD_MIN)
109 			return -EINVAL;
110 		param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
111 	} else if (!strncmp("snooze_enable=", buf, 14)) {
112 		if (sscanf(buf + 14, "%d", &val) != 1)
113 			return -EINVAL;
114 		param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
115 	} else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
116 		if (sscanf(buf + 18, "%d", &val) != 1)
117 			return -EINVAL;
118 		param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
119 	} else if (!strncmp("use_ps_poll=", buf, 12)) {
120 		if (sscanf(buf + 12, "%d", &val) != 1)
121 			return -EINVAL;
122 		param = MVM_DEBUGFS_PM_USE_PS_POLL;
123 	} else {
124 		return -EINVAL;
125 	}
126 
127 	mutex_lock(&mvm->mutex);
128 	iwl_dbgfs_update_pm(mvm, vif, param, val);
129 	ret = iwl_mvm_power_update_mac(mvm);
130 	mutex_unlock(&mvm->mutex);
131 
132 	return ret ?: count;
133 }
134 
135 static ssize_t iwl_dbgfs_tx_pwr_lmt_read(struct file *file,
136 					 char __user *user_buf,
137 					 size_t count, loff_t *ppos)
138 {
139 	struct ieee80211_vif *vif = file->private_data;
140 	char buf[64];
141 	int bufsz = sizeof(buf);
142 	int pos;
143 
144 	pos = scnprintf(buf, bufsz, "bss limit = %d\n",
145 			vif->bss_conf.txpower);
146 
147 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
148 }
149 
150 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
151 					char __user *user_buf,
152 					size_t count, loff_t *ppos)
153 {
154 	struct ieee80211_vif *vif = file->private_data;
155 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
156 	struct iwl_mvm *mvm = mvmvif->mvm;
157 	char buf[512];
158 	int bufsz = sizeof(buf);
159 	int pos;
160 
161 	pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
162 
163 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
164 }
165 
166 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
167 					 char __user *user_buf,
168 					 size_t count, loff_t *ppos)
169 {
170 	struct ieee80211_vif *vif = file->private_data;
171 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
172 	struct iwl_mvm *mvm = mvmvif->mvm;
173 	u8 ap_sta_id;
174 	struct ieee80211_chanctx_conf *chanctx_conf;
175 	char buf[512];
176 	int bufsz = sizeof(buf);
177 	int pos = 0;
178 	int i;
179 
180 	mutex_lock(&mvm->mutex);
181 
182 	ap_sta_id = mvmvif->ap_sta_id;
183 
184 	switch (ieee80211_vif_type_p2p(vif)) {
185 	case NL80211_IFTYPE_ADHOC:
186 		pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
187 		break;
188 	case NL80211_IFTYPE_STATION:
189 		pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
190 		break;
191 	case NL80211_IFTYPE_AP:
192 		pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
193 		break;
194 	case NL80211_IFTYPE_P2P_CLIENT:
195 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
196 		break;
197 	case NL80211_IFTYPE_P2P_GO:
198 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
199 		break;
200 	case NL80211_IFTYPE_P2P_DEVICE:
201 		pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
202 		break;
203 	default:
204 		break;
205 	}
206 
207 	pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
208 			 mvmvif->id, mvmvif->color);
209 	pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
210 			 vif->bss_conf.bssid);
211 	pos += scnprintf(buf+pos, bufsz-pos, "Load: %d\n",
212 			 mvm->tcm.result.load[mvmvif->id]);
213 	pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
214 	for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
215 		pos += scnprintf(buf+pos, bufsz-pos,
216 				 "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
217 				 i, mvmvif->queue_params[i].txop,
218 				 mvmvif->queue_params[i].cw_min,
219 				 mvmvif->queue_params[i].cw_max,
220 				 mvmvif->queue_params[i].aifs,
221 				 mvmvif->queue_params[i].uapsd);
222 
223 	if (vif->type == NL80211_IFTYPE_STATION &&
224 	    ap_sta_id != IWL_MVM_INVALID_STA) {
225 		struct iwl_mvm_sta *mvm_sta;
226 
227 		mvm_sta = iwl_mvm_sta_from_staid_protected(mvm, ap_sta_id);
228 		if (mvm_sta) {
229 			pos += scnprintf(buf+pos, bufsz-pos,
230 					 "ap_sta_id %d - reduced Tx power %d\n",
231 					 ap_sta_id,
232 					 mvm_sta->bt_reduced_txpower);
233 		}
234 	}
235 
236 	rcu_read_lock();
237 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
238 	if (chanctx_conf)
239 		pos += scnprintf(buf+pos, bufsz-pos,
240 				 "idle rx chains %d, active rx chains: %d\n",
241 				 chanctx_conf->rx_chains_static,
242 				 chanctx_conf->rx_chains_dynamic);
243 	rcu_read_unlock();
244 
245 	mutex_unlock(&mvm->mutex);
246 
247 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
248 }
249 
250 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
251 				enum iwl_dbgfs_bf_mask param, int value)
252 {
253 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
254 	struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
255 
256 	dbgfs_bf->mask |= param;
257 
258 	switch (param) {
259 	case MVM_DEBUGFS_BF_ENERGY_DELTA:
260 		dbgfs_bf->bf_energy_delta = value;
261 		break;
262 	case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
263 		dbgfs_bf->bf_roaming_energy_delta = value;
264 		break;
265 	case MVM_DEBUGFS_BF_ROAMING_STATE:
266 		dbgfs_bf->bf_roaming_state = value;
267 		break;
268 	case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
269 		dbgfs_bf->bf_temp_threshold = value;
270 		break;
271 	case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
272 		dbgfs_bf->bf_temp_fast_filter = value;
273 		break;
274 	case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
275 		dbgfs_bf->bf_temp_slow_filter = value;
276 		break;
277 	case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
278 		dbgfs_bf->bf_enable_beacon_filter = value;
279 		break;
280 	case MVM_DEBUGFS_BF_DEBUG_FLAG:
281 		dbgfs_bf->bf_debug_flag = value;
282 		break;
283 	case MVM_DEBUGFS_BF_ESCAPE_TIMER:
284 		dbgfs_bf->bf_escape_timer = value;
285 		break;
286 	case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
287 		dbgfs_bf->ba_enable_beacon_abort = value;
288 		break;
289 	case MVM_DEBUGFS_BA_ESCAPE_TIMER:
290 		dbgfs_bf->ba_escape_timer = value;
291 		break;
292 	}
293 }
294 
295 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
296 					 size_t count, loff_t *ppos)
297 {
298 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
299 	struct iwl_mvm *mvm = mvmvif->mvm;
300 	enum iwl_dbgfs_bf_mask param;
301 	int value, ret = 0;
302 
303 	if (!strncmp("bf_energy_delta=", buf, 16)) {
304 		if (sscanf(buf+16, "%d", &value) != 1)
305 			return -EINVAL;
306 		if (value < IWL_BF_ENERGY_DELTA_MIN ||
307 		    value > IWL_BF_ENERGY_DELTA_MAX)
308 			return -EINVAL;
309 		param = MVM_DEBUGFS_BF_ENERGY_DELTA;
310 	} else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
311 		if (sscanf(buf+24, "%d", &value) != 1)
312 			return -EINVAL;
313 		if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
314 		    value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
315 			return -EINVAL;
316 		param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
317 	} else if (!strncmp("bf_roaming_state=", buf, 17)) {
318 		if (sscanf(buf+17, "%d", &value) != 1)
319 			return -EINVAL;
320 		if (value < IWL_BF_ROAMING_STATE_MIN ||
321 		    value > IWL_BF_ROAMING_STATE_MAX)
322 			return -EINVAL;
323 		param = MVM_DEBUGFS_BF_ROAMING_STATE;
324 	} else if (!strncmp("bf_temp_threshold=", buf, 18)) {
325 		if (sscanf(buf+18, "%d", &value) != 1)
326 			return -EINVAL;
327 		if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
328 		    value > IWL_BF_TEMP_THRESHOLD_MAX)
329 			return -EINVAL;
330 		param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
331 	} else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
332 		if (sscanf(buf+20, "%d", &value) != 1)
333 			return -EINVAL;
334 		if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
335 		    value > IWL_BF_TEMP_FAST_FILTER_MAX)
336 			return -EINVAL;
337 		param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
338 	} else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
339 		if (sscanf(buf+20, "%d", &value) != 1)
340 			return -EINVAL;
341 		if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
342 		    value > IWL_BF_TEMP_SLOW_FILTER_MAX)
343 			return -EINVAL;
344 		param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
345 	} else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
346 		if (sscanf(buf+24, "%d", &value) != 1)
347 			return -EINVAL;
348 		if (value < 0 || value > 1)
349 			return -EINVAL;
350 		param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
351 	} else if (!strncmp("bf_debug_flag=", buf, 14)) {
352 		if (sscanf(buf+14, "%d", &value) != 1)
353 			return -EINVAL;
354 		if (value < 0 || value > 1)
355 			return -EINVAL;
356 		param = MVM_DEBUGFS_BF_DEBUG_FLAG;
357 	} else if (!strncmp("bf_escape_timer=", buf, 16)) {
358 		if (sscanf(buf+16, "%d", &value) != 1)
359 			return -EINVAL;
360 		if (value < IWL_BF_ESCAPE_TIMER_MIN ||
361 		    value > IWL_BF_ESCAPE_TIMER_MAX)
362 			return -EINVAL;
363 		param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
364 	} else if (!strncmp("ba_escape_timer=", buf, 16)) {
365 		if (sscanf(buf+16, "%d", &value) != 1)
366 			return -EINVAL;
367 		if (value < IWL_BA_ESCAPE_TIMER_MIN ||
368 		    value > IWL_BA_ESCAPE_TIMER_MAX)
369 			return -EINVAL;
370 		param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
371 	} else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
372 		if (sscanf(buf+23, "%d", &value) != 1)
373 			return -EINVAL;
374 		if (value < 0 || value > 1)
375 			return -EINVAL;
376 		param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
377 	} else {
378 		return -EINVAL;
379 	}
380 
381 	mutex_lock(&mvm->mutex);
382 	iwl_dbgfs_update_bf(vif, param, value);
383 	if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
384 		ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
385 	else
386 		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
387 	mutex_unlock(&mvm->mutex);
388 
389 	return ret ?: count;
390 }
391 
392 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
393 					char __user *user_buf,
394 					size_t count, loff_t *ppos)
395 {
396 	struct ieee80211_vif *vif = file->private_data;
397 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
398 	char buf[256];
399 	int pos = 0;
400 	const size_t bufsz = sizeof(buf);
401 	struct iwl_beacon_filter_cmd cmd = {
402 		IWL_BF_CMD_CONFIG_DEFAULTS,
403 		.bf_enable_beacon_filter =
404 			cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
405 		.ba_enable_beacon_abort =
406 			cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
407 	};
408 
409 	iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
410 	if (mvmvif->bf_data.bf_enabled)
411 		cmd.bf_enable_beacon_filter = cpu_to_le32(1);
412 	else
413 		cmd.bf_enable_beacon_filter = 0;
414 
415 	pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
416 			 le32_to_cpu(cmd.bf_energy_delta));
417 	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
418 			 le32_to_cpu(cmd.bf_roaming_energy_delta));
419 	pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
420 			 le32_to_cpu(cmd.bf_roaming_state));
421 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
422 			 le32_to_cpu(cmd.bf_temp_threshold));
423 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
424 			 le32_to_cpu(cmd.bf_temp_fast_filter));
425 	pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
426 			 le32_to_cpu(cmd.bf_temp_slow_filter));
427 	pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
428 			 le32_to_cpu(cmd.bf_enable_beacon_filter));
429 	pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
430 			 le32_to_cpu(cmd.bf_debug_flag));
431 	pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
432 			 le32_to_cpu(cmd.bf_escape_timer));
433 	pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
434 			 le32_to_cpu(cmd.ba_escape_timer));
435 	pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
436 			 le32_to_cpu(cmd.ba_enable_beacon_abort));
437 
438 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
439 }
440 
441 static inline char *iwl_dbgfs_is_match(char *name, char *buf)
442 {
443 	int len = strlen(name);
444 
445 	return !strncmp(name, buf, len) ? buf + len : NULL;
446 }
447 
448 static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
449 						 char __user *user_buf,
450 						 size_t count, loff_t *ppos)
451 {
452 	struct ieee80211_vif *vif = file->private_data;
453 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
454 	struct iwl_mvm *mvm = mvmvif->mvm;
455 	u32 curr_gp2;
456 	u64 curr_os;
457 	s64 diff;
458 	char buf[64];
459 	const size_t bufsz = sizeof(buf);
460 	int pos = 0;
461 
462 	mutex_lock(&mvm->mutex);
463 	iwl_mvm_get_sync_time(mvm, &curr_gp2, &curr_os);
464 	mutex_unlock(&mvm->mutex);
465 
466 	do_div(curr_os, NSEC_PER_USEC);
467 	diff = curr_os - curr_gp2;
468 	pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);
469 
470 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
471 }
472 
473 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
474 					   size_t count, loff_t *ppos)
475 {
476 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
477 	struct iwl_mvm *mvm = mvmvif->mvm;
478 	u8 value;
479 	int ret;
480 
481 	ret = kstrtou8(buf, 0, &value);
482 	if (ret)
483 		return ret;
484 	if (value > 1)
485 		return -EINVAL;
486 
487 	mutex_lock(&mvm->mutex);
488 	iwl_mvm_update_low_latency(mvm, vif, value, LOW_LATENCY_DEBUGFS);
489 	mutex_unlock(&mvm->mutex);
490 
491 	return count;
492 }
493 
494 static ssize_t
495 iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
496 				  size_t count, loff_t *ppos)
497 {
498 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
499 	struct iwl_mvm *mvm = mvmvif->mvm;
500 	u8 value;
501 	int ret;
502 
503 	ret = kstrtou8(buf, 0, &value);
504 	if (ret)
505 		return ret;
506 
507 	if (value > NUM_LOW_LATENCY_FORCE)
508 		return -EINVAL;
509 
510 	mutex_lock(&mvm->mutex);
511 	if (value == LOW_LATENCY_FORCE_UNSET) {
512 		iwl_mvm_update_low_latency(mvm, vif, false,
513 					   LOW_LATENCY_DEBUGFS_FORCE);
514 		iwl_mvm_update_low_latency(mvm, vif, false,
515 					   LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
516 	} else {
517 		iwl_mvm_update_low_latency(mvm, vif,
518 					   value == LOW_LATENCY_FORCE_ON,
519 					   LOW_LATENCY_DEBUGFS_FORCE);
520 		iwl_mvm_update_low_latency(mvm, vif, true,
521 					   LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
522 	}
523 	mutex_unlock(&mvm->mutex);
524 	return count;
525 }
526 
527 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
528 					  char __user *user_buf,
529 					  size_t count, loff_t *ppos)
530 {
531 	struct ieee80211_vif *vif = file->private_data;
532 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
533 	char format[] = "traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n"
534 			"dbgfs_force_enable=%d\ndbgfs_force=%d\nactual=%d\n";
535 
536 	/*
537 	 * all values in format are boolean so the size of format is enough
538 	 * for holding the result string
539 	 */
540 	char buf[sizeof(format) + 1] = {};
541 	int len;
542 
543 	len = scnprintf(buf, sizeof(buf) - 1, format,
544 			!!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC),
545 			!!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS),
546 			!!(mvmvif->low_latency & LOW_LATENCY_VCMD),
547 			!!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE),
548 			!!(mvmvif->low_latency &
549 			   LOW_LATENCY_DEBUGFS_FORCE_ENABLE),
550 			!!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS_FORCE),
551 			!!(mvmvif->low_latency_actual));
552 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
553 }
554 
555 static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file,
556 						char __user *user_buf,
557 						size_t count, loff_t *ppos)
558 {
559 	struct ieee80211_vif *vif = file->private_data;
560 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
561 	char buf[20];
562 	int len;
563 
564 	len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid);
565 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
566 }
567 
568 static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
569 						 char *buf, size_t count,
570 						 loff_t *ppos)
571 {
572 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
573 	struct iwl_mvm *mvm = mvmvif->mvm;
574 	bool ret;
575 
576 	mutex_lock(&mvm->mutex);
577 	ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid);
578 	mutex_unlock(&mvm->mutex);
579 
580 	return ret ? count : -EINVAL;
581 }
582 
583 static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf,
584 					  size_t count, loff_t *ppos)
585 {
586 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
587 	struct iwl_mvm *mvm = mvmvif->mvm;
588 	struct ieee80211_chanctx_conf *chanctx_conf;
589 	struct iwl_mvm_phy_ctxt *phy_ctxt;
590 	u16 value;
591 	int ret;
592 
593 	ret = kstrtou16(buf, 0, &value);
594 	if (ret)
595 		return ret;
596 
597 	mutex_lock(&mvm->mutex);
598 	rcu_read_lock();
599 
600 	chanctx_conf = rcu_dereference(vif->chanctx_conf);
601 	/* make sure the channel context is assigned */
602 	if (!chanctx_conf) {
603 		rcu_read_unlock();
604 		mutex_unlock(&mvm->mutex);
605 		return -EINVAL;
606 	}
607 
608 	phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv];
609 	rcu_read_unlock();
610 
611 	mvm->dbgfs_rx_phyinfo = value;
612 
613 	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def,
614 				       chanctx_conf->rx_chains_static,
615 				       chanctx_conf->rx_chains_dynamic);
616 	mutex_unlock(&mvm->mutex);
617 
618 	return ret ?: count;
619 }
620 
621 static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file,
622 					 char __user *user_buf,
623 					 size_t count, loff_t *ppos)
624 {
625 	struct ieee80211_vif *vif = file->private_data;
626 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
627 	char buf[8];
628 	int len;
629 
630 	len = scnprintf(buf, sizeof(buf), "0x%04x\n",
631 			mvmvif->mvm->dbgfs_rx_phyinfo);
632 
633 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
634 }
635 
636 static void iwl_dbgfs_quota_check(void *data, u8 *mac,
637 				  struct ieee80211_vif *vif)
638 {
639 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
640 	int *ret = data;
641 
642 	if (mvmvif->dbgfs_quota_min)
643 		*ret = -EINVAL;
644 }
645 
646 static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf,
647 					 size_t count, loff_t *ppos)
648 {
649 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
650 	struct iwl_mvm *mvm = mvmvif->mvm;
651 	u16 value;
652 	int ret;
653 
654 	ret = kstrtou16(buf, 0, &value);
655 	if (ret)
656 		return ret;
657 
658 	if (value > 95)
659 		return -EINVAL;
660 
661 	mutex_lock(&mvm->mutex);
662 
663 	mvmvif->dbgfs_quota_min = 0;
664 	ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
665 				     iwl_dbgfs_quota_check, &ret);
666 	if (ret == 0) {
667 		mvmvif->dbgfs_quota_min = value;
668 		iwl_mvm_update_quotas(mvm, false, NULL);
669 	}
670 	mutex_unlock(&mvm->mutex);
671 
672 	return ret ?: count;
673 }
674 
675 static ssize_t iwl_dbgfs_quota_min_read(struct file *file,
676 					char __user *user_buf,
677 					size_t count, loff_t *ppos)
678 {
679 	struct ieee80211_vif *vif = file->private_data;
680 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
681 	char buf[10];
682 	int len;
683 
684 	len = scnprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min);
685 
686 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
687 }
688 
689 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
690 	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
691 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
692 	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
693 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {		\
694 		debugfs_create_file(#name, mode, parent, vif,		\
695 				    &iwl_dbgfs_##name##_ops);		\
696 	} while (0)
697 
698 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
699 MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt);
700 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
701 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
702 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
703 MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10);
704 MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
705 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
706 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
707 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
708 
709 
710 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
711 {
712 	struct dentry *dbgfs_dir = vif->debugfs_dir;
713 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
714 	char buf[100];
715 
716 	/*
717 	 * Check if debugfs directory already exist before creating it.
718 	 * This may happen when, for example, resetting hw or suspend-resume
719 	 */
720 	if (!dbgfs_dir || mvmvif->dbgfs_dir)
721 		return;
722 
723 	mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
724 	if (IS_ERR_OR_NULL(mvmvif->dbgfs_dir)) {
725 		IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n",
726 			dbgfs_dir);
727 		return;
728 	}
729 
730 	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
731 	    ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
732 	     (vif->type == NL80211_IFTYPE_STATION && vif->p2p)))
733 		MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, 0600);
734 
735 	MVM_DEBUGFS_ADD_FILE_VIF(tx_pwr_lmt, mvmvif->dbgfs_dir, 0400);
736 	MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, 0400);
737 	MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir, 0600);
738 	MVM_DEBUGFS_ADD_FILE_VIF(low_latency_force, mvmvif->dbgfs_dir, 0600);
739 	MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir, 0600);
740 	MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600);
741 	MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600);
742 	MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400);
743 
744 	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
745 	    mvmvif == mvm->bf_allowed_vif)
746 		MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir, 0600);
747 
748 	/*
749 	 * Create symlink for convenience pointing to interface specific
750 	 * debugfs entries for the driver. For example, under
751 	 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
752 	 * find
753 	 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
754 	 */
755 	snprintf(buf, 100, "../../../%pd3/%pd",
756 		 dbgfs_dir,
757 		 mvmvif->dbgfs_dir);
758 
759 	mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
760 						     mvm->debugfs_dir, buf);
761 }
762 
763 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
764 {
765 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
766 
767 	debugfs_remove(mvmvif->dbgfs_slink);
768 	mvmvif->dbgfs_slink = NULL;
769 
770 	debugfs_remove_recursive(mvmvif->dbgfs_dir);
771 	mvmvif->dbgfs_dir = NULL;
772 }
773