1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2021 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->bss_conf.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 ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
442 						 char __user *user_buf,
443 						 size_t count, loff_t *ppos)
444 {
445 	struct ieee80211_vif *vif = file->private_data;
446 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
447 	struct iwl_mvm *mvm = mvmvif->mvm;
448 	u32 curr_gp2;
449 	u64 curr_os;
450 	s64 diff;
451 	char buf[64];
452 	const size_t bufsz = sizeof(buf);
453 	int pos = 0;
454 
455 	mutex_lock(&mvm->mutex);
456 	iwl_mvm_get_sync_time(mvm, CLOCK_BOOTTIME, &curr_gp2, &curr_os, NULL);
457 	mutex_unlock(&mvm->mutex);
458 
459 	do_div(curr_os, NSEC_PER_USEC);
460 	diff = curr_os - curr_gp2;
461 	pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);
462 
463 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
464 }
465 
466 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
467 					   size_t count, loff_t *ppos)
468 {
469 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
470 	struct iwl_mvm *mvm = mvmvif->mvm;
471 	u8 value;
472 	int ret;
473 
474 	ret = kstrtou8(buf, 0, &value);
475 	if (ret)
476 		return ret;
477 	if (value > 1)
478 		return -EINVAL;
479 
480 	mutex_lock(&mvm->mutex);
481 	iwl_mvm_update_low_latency(mvm, vif, value, LOW_LATENCY_DEBUGFS);
482 	mutex_unlock(&mvm->mutex);
483 
484 	return count;
485 }
486 
487 static ssize_t
488 iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
489 				  size_t count, loff_t *ppos)
490 {
491 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
492 	struct iwl_mvm *mvm = mvmvif->mvm;
493 	u8 value;
494 	int ret;
495 
496 	ret = kstrtou8(buf, 0, &value);
497 	if (ret)
498 		return ret;
499 
500 	if (value > NUM_LOW_LATENCY_FORCE)
501 		return -EINVAL;
502 
503 	mutex_lock(&mvm->mutex);
504 	if (value == LOW_LATENCY_FORCE_UNSET) {
505 		iwl_mvm_update_low_latency(mvm, vif, false,
506 					   LOW_LATENCY_DEBUGFS_FORCE);
507 		iwl_mvm_update_low_latency(mvm, vif, false,
508 					   LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
509 	} else {
510 		iwl_mvm_update_low_latency(mvm, vif,
511 					   value == LOW_LATENCY_FORCE_ON,
512 					   LOW_LATENCY_DEBUGFS_FORCE);
513 		iwl_mvm_update_low_latency(mvm, vif, true,
514 					   LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
515 	}
516 	mutex_unlock(&mvm->mutex);
517 	return count;
518 }
519 
520 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
521 					  char __user *user_buf,
522 					  size_t count, loff_t *ppos)
523 {
524 	struct ieee80211_vif *vif = file->private_data;
525 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
526 	char format[] = "traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n"
527 			"dbgfs_force_enable=%d\ndbgfs_force=%d\nactual=%d\n";
528 
529 	/*
530 	 * all values in format are boolean so the size of format is enough
531 	 * for holding the result string
532 	 */
533 	char buf[sizeof(format) + 1] = {};
534 	int len;
535 
536 	len = scnprintf(buf, sizeof(buf) - 1, format,
537 			!!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC),
538 			!!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS),
539 			!!(mvmvif->low_latency & LOW_LATENCY_VCMD),
540 			!!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE),
541 			!!(mvmvif->low_latency &
542 			   LOW_LATENCY_DEBUGFS_FORCE_ENABLE),
543 			!!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS_FORCE),
544 			!!(mvmvif->low_latency_actual));
545 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
546 }
547 
548 static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file,
549 						char __user *user_buf,
550 						size_t count, loff_t *ppos)
551 {
552 	struct ieee80211_vif *vif = file->private_data;
553 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
554 	char buf[20];
555 	int len;
556 
557 	len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid);
558 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
559 }
560 
561 static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
562 						 char *buf, size_t count,
563 						 loff_t *ppos)
564 {
565 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
566 	struct iwl_mvm *mvm = mvmvif->mvm;
567 	bool ret;
568 
569 	mutex_lock(&mvm->mutex);
570 	ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid);
571 	mutex_unlock(&mvm->mutex);
572 
573 	return ret ? count : -EINVAL;
574 }
575 
576 static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf,
577 					  size_t count, loff_t *ppos)
578 {
579 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
580 	struct iwl_mvm *mvm = mvmvif->mvm;
581 	struct ieee80211_chanctx_conf *chanctx_conf;
582 	struct iwl_mvm_phy_ctxt *phy_ctxt;
583 	u16 value;
584 	int ret;
585 
586 	ret = kstrtou16(buf, 0, &value);
587 	if (ret)
588 		return ret;
589 
590 	mutex_lock(&mvm->mutex);
591 	rcu_read_lock();
592 
593 	chanctx_conf = rcu_dereference(vif->bss_conf.chanctx_conf);
594 	/* make sure the channel context is assigned */
595 	if (!chanctx_conf) {
596 		rcu_read_unlock();
597 		mutex_unlock(&mvm->mutex);
598 		return -EINVAL;
599 	}
600 
601 	phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv];
602 	rcu_read_unlock();
603 
604 	mvm->dbgfs_rx_phyinfo = value;
605 
606 	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def,
607 				       chanctx_conf->rx_chains_static,
608 				       chanctx_conf->rx_chains_dynamic);
609 	mutex_unlock(&mvm->mutex);
610 
611 	return ret ?: count;
612 }
613 
614 static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file,
615 					 char __user *user_buf,
616 					 size_t count, loff_t *ppos)
617 {
618 	struct ieee80211_vif *vif = file->private_data;
619 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
620 	char buf[8];
621 	int len;
622 
623 	len = scnprintf(buf, sizeof(buf), "0x%04x\n",
624 			mvmvif->mvm->dbgfs_rx_phyinfo);
625 
626 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
627 }
628 
629 static void iwl_dbgfs_quota_check(void *data, u8 *mac,
630 				  struct ieee80211_vif *vif)
631 {
632 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
633 	int *ret = data;
634 
635 	if (mvmvif->dbgfs_quota_min)
636 		*ret = -EINVAL;
637 }
638 
639 static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf,
640 					 size_t count, loff_t *ppos)
641 {
642 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
643 	struct iwl_mvm *mvm = mvmvif->mvm;
644 	u16 value;
645 	int ret;
646 
647 	ret = kstrtou16(buf, 0, &value);
648 	if (ret)
649 		return ret;
650 
651 	if (value > 95)
652 		return -EINVAL;
653 
654 	mutex_lock(&mvm->mutex);
655 
656 	mvmvif->dbgfs_quota_min = 0;
657 	ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
658 				     iwl_dbgfs_quota_check, &ret);
659 	if (ret == 0) {
660 		mvmvif->dbgfs_quota_min = value;
661 		iwl_mvm_update_quotas(mvm, false, NULL);
662 	}
663 	mutex_unlock(&mvm->mutex);
664 
665 	return ret ?: count;
666 }
667 
668 static ssize_t iwl_dbgfs_quota_min_read(struct file *file,
669 					char __user *user_buf,
670 					size_t count, loff_t *ppos)
671 {
672 	struct ieee80211_vif *vif = file->private_data;
673 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
674 	char buf[10];
675 	int len;
676 
677 	len = scnprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min);
678 
679 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
680 }
681 
682 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
683 	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
684 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
685 	_MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
686 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do {		\
687 		debugfs_create_file(#name, mode, parent, vif,		\
688 				    &iwl_dbgfs_##name##_ops);		\
689 	} while (0)
690 
691 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
692 MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt);
693 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
694 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
695 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
696 MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10);
697 MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
698 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
699 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
700 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
701 
702 
703 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
704 {
705 	struct dentry *dbgfs_dir = vif->debugfs_dir;
706 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
707 	char buf[100];
708 
709 	/*
710 	 * Check if debugfs directory already exist before creating it.
711 	 * This may happen when, for example, resetting hw or suspend-resume
712 	 */
713 	if (!dbgfs_dir || mvmvif->dbgfs_dir)
714 		return;
715 
716 	mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
717 	if (IS_ERR_OR_NULL(mvmvif->dbgfs_dir)) {
718 		IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n",
719 			dbgfs_dir);
720 		return;
721 	}
722 
723 	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
724 	    ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
725 	     (vif->type == NL80211_IFTYPE_STATION && vif->p2p)))
726 		MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, 0600);
727 
728 	MVM_DEBUGFS_ADD_FILE_VIF(tx_pwr_lmt, mvmvif->dbgfs_dir, 0400);
729 	MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, 0400);
730 	MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir, 0600);
731 	MVM_DEBUGFS_ADD_FILE_VIF(low_latency_force, mvmvif->dbgfs_dir, 0600);
732 	MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir, 0600);
733 	MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600);
734 	MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600);
735 	MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400);
736 
737 	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
738 	    mvmvif == mvm->bf_allowed_vif)
739 		MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir, 0600);
740 
741 	/*
742 	 * Create symlink for convenience pointing to interface specific
743 	 * debugfs entries for the driver. For example, under
744 	 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
745 	 * find
746 	 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
747 	 */
748 	snprintf(buf, 100, "../../../%pd3/%pd",
749 		 dbgfs_dir,
750 		 mvmvif->dbgfs_dir);
751 
752 	mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
753 						     mvm->debugfs_dir, buf);
754 }
755 
756 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
757 {
758 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
759 
760 	debugfs_remove(mvmvif->dbgfs_slink);
761 	mvmvif->dbgfs_slink = NULL;
762 
763 	debugfs_remove_recursive(mvmvif->dbgfs_dir);
764 	mvmvif->dbgfs_dir = NULL;
765 }
766