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iwlwifi: mvm: properly check debugfs dentry before using it
[thirdparty/kernel/linux.git] / drivers / net / wireless / intel / iwlwifi / mvm / debugfs-vif.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called COPYING.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <linuxwifi@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 * BSD LICENSE
29 *
30 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
31 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
32 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 *
39 * * Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * * Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in
43 * the documentation and/or other materials provided with the
44 * distribution.
45 * * Neither the name Intel Corporation nor the names of its
46 * contributors may be used to endorse or promote products derived
47 * from this software without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
50 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
51 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
52 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
53 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
55 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
60 *
61 *****************************************************************************/
62 #include "mvm.h"
63 #include "debugfs.h"
64
65 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
66 struct ieee80211_vif *vif,
67 enum iwl_dbgfs_pm_mask param, int val)
68 {
69 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
70 struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
71
72 dbgfs_pm->mask |= param;
73
74 switch (param) {
75 case MVM_DEBUGFS_PM_KEEP_ALIVE: {
76 int dtimper = vif->bss_conf.dtim_period ?: 1;
77 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
78
79 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
80 if (val * MSEC_PER_SEC < 3 * dtimper_msec)
81 IWL_WARN(mvm,
82 "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
83 val * MSEC_PER_SEC, 3 * dtimper_msec);
84 dbgfs_pm->keep_alive_seconds = val;
85 break;
86 }
87 case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
88 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
89 val ? "enabled" : "disabled");
90 dbgfs_pm->skip_over_dtim = val;
91 break;
92 case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
93 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
94 dbgfs_pm->skip_dtim_periods = val;
95 break;
96 case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
97 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
98 dbgfs_pm->rx_data_timeout = val;
99 break;
100 case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
101 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
102 dbgfs_pm->tx_data_timeout = val;
103 break;
104 case MVM_DEBUGFS_PM_LPRX_ENA:
105 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
106 dbgfs_pm->lprx_ena = val;
107 break;
108 case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
109 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
110 dbgfs_pm->lprx_rssi_threshold = val;
111 break;
112 case MVM_DEBUGFS_PM_SNOOZE_ENABLE:
113 IWL_DEBUG_POWER(mvm, "snooze_enable=%d\n", val);
114 dbgfs_pm->snooze_ena = val;
115 break;
116 case MVM_DEBUGFS_PM_UAPSD_MISBEHAVING:
117 IWL_DEBUG_POWER(mvm, "uapsd_misbehaving_enable=%d\n", val);
118 dbgfs_pm->uapsd_misbehaving = val;
119 break;
120 case MVM_DEBUGFS_PM_USE_PS_POLL:
121 IWL_DEBUG_POWER(mvm, "use_ps_poll=%d\n", val);
122 dbgfs_pm->use_ps_poll = val;
123 break;
124 }
125 }
126
127 static ssize_t iwl_dbgfs_pm_params_write(struct ieee80211_vif *vif, char *buf,
128 size_t count, loff_t *ppos)
129 {
130 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
131 struct iwl_mvm *mvm = mvmvif->mvm;
132 enum iwl_dbgfs_pm_mask param;
133 int val, ret;
134
135 if (!strncmp("keep_alive=", buf, 11)) {
136 if (sscanf(buf + 11, "%d", &val) != 1)
137 return -EINVAL;
138 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
139 } else if (!strncmp("skip_over_dtim=", buf, 15)) {
140 if (sscanf(buf + 15, "%d", &val) != 1)
141 return -EINVAL;
142 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
143 } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
144 if (sscanf(buf + 18, "%d", &val) != 1)
145 return -EINVAL;
146 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
147 } else if (!strncmp("rx_data_timeout=", buf, 16)) {
148 if (sscanf(buf + 16, "%d", &val) != 1)
149 return -EINVAL;
150 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
151 } else if (!strncmp("tx_data_timeout=", buf, 16)) {
152 if (sscanf(buf + 16, "%d", &val) != 1)
153 return -EINVAL;
154 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
155 } else if (!strncmp("lprx=", buf, 5)) {
156 if (sscanf(buf + 5, "%d", &val) != 1)
157 return -EINVAL;
158 param = MVM_DEBUGFS_PM_LPRX_ENA;
159 } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
160 if (sscanf(buf + 20, "%d", &val) != 1)
161 return -EINVAL;
162 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
163 POWER_LPRX_RSSI_THRESHOLD_MIN)
164 return -EINVAL;
165 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
166 } else if (!strncmp("snooze_enable=", buf, 14)) {
167 if (sscanf(buf + 14, "%d", &val) != 1)
168 return -EINVAL;
169 param = MVM_DEBUGFS_PM_SNOOZE_ENABLE;
170 } else if (!strncmp("uapsd_misbehaving=", buf, 18)) {
171 if (sscanf(buf + 18, "%d", &val) != 1)
172 return -EINVAL;
173 param = MVM_DEBUGFS_PM_UAPSD_MISBEHAVING;
174 } else if (!strncmp("use_ps_poll=", buf, 12)) {
175 if (sscanf(buf + 12, "%d", &val) != 1)
176 return -EINVAL;
177 param = MVM_DEBUGFS_PM_USE_PS_POLL;
178 } else {
179 return -EINVAL;
180 }
181
182 mutex_lock(&mvm->mutex);
183 iwl_dbgfs_update_pm(mvm, vif, param, val);
184 ret = iwl_mvm_power_update_mac(mvm);
185 mutex_unlock(&mvm->mutex);
186
187 return ret ?: count;
188 }
189
190 static ssize_t iwl_dbgfs_tx_pwr_lmt_read(struct file *file,
191 char __user *user_buf,
192 size_t count, loff_t *ppos)
193 {
194 struct ieee80211_vif *vif = file->private_data;
195 char buf[64];
196 int bufsz = sizeof(buf);
197 int pos;
198
199 pos = scnprintf(buf, bufsz, "bss limit = %d\n",
200 vif->bss_conf.txpower);
201
202 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
203 }
204
205 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
206 char __user *user_buf,
207 size_t count, loff_t *ppos)
208 {
209 struct ieee80211_vif *vif = file->private_data;
210 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
211 struct iwl_mvm *mvm = mvmvif->mvm;
212 char buf[512];
213 int bufsz = sizeof(buf);
214 int pos;
215
216 pos = iwl_mvm_power_mac_dbgfs_read(mvm, vif, buf, bufsz);
217
218 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
219 }
220
221 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
222 char __user *user_buf,
223 size_t count, loff_t *ppos)
224 {
225 struct ieee80211_vif *vif = file->private_data;
226 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
227 struct iwl_mvm *mvm = mvmvif->mvm;
228 u8 ap_sta_id;
229 struct ieee80211_chanctx_conf *chanctx_conf;
230 char buf[512];
231 int bufsz = sizeof(buf);
232 int pos = 0;
233 int i;
234
235 mutex_lock(&mvm->mutex);
236
237 ap_sta_id = mvmvif->ap_sta_id;
238
239 switch (ieee80211_vif_type_p2p(vif)) {
240 case NL80211_IFTYPE_ADHOC:
241 pos += scnprintf(buf+pos, bufsz-pos, "type: ibss\n");
242 break;
243 case NL80211_IFTYPE_STATION:
244 pos += scnprintf(buf+pos, bufsz-pos, "type: bss\n");
245 break;
246 case NL80211_IFTYPE_AP:
247 pos += scnprintf(buf+pos, bufsz-pos, "type: ap\n");
248 break;
249 case NL80211_IFTYPE_P2P_CLIENT:
250 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p client\n");
251 break;
252 case NL80211_IFTYPE_P2P_GO:
253 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p go\n");
254 break;
255 case NL80211_IFTYPE_P2P_DEVICE:
256 pos += scnprintf(buf+pos, bufsz-pos, "type: p2p dev\n");
257 break;
258 default:
259 break;
260 }
261
262 pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
263 mvmvif->id, mvmvif->color);
264 pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
265 vif->bss_conf.bssid);
266 pos += scnprintf(buf+pos, bufsz-pos, "Load: %d\n",
267 mvm->tcm.result.load[mvmvif->id]);
268 pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
269 for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++)
270 pos += scnprintf(buf+pos, bufsz-pos,
271 "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
272 i, mvmvif->queue_params[i].txop,
273 mvmvif->queue_params[i].cw_min,
274 mvmvif->queue_params[i].cw_max,
275 mvmvif->queue_params[i].aifs,
276 mvmvif->queue_params[i].uapsd);
277
278 if (vif->type == NL80211_IFTYPE_STATION &&
279 ap_sta_id != IWL_MVM_INVALID_STA) {
280 struct iwl_mvm_sta *mvm_sta;
281
282 mvm_sta = iwl_mvm_sta_from_staid_protected(mvm, ap_sta_id);
283 if (mvm_sta) {
284 pos += scnprintf(buf+pos, bufsz-pos,
285 "ap_sta_id %d - reduced Tx power %d\n",
286 ap_sta_id,
287 mvm_sta->bt_reduced_txpower);
288 }
289 }
290
291 rcu_read_lock();
292 chanctx_conf = rcu_dereference(vif->chanctx_conf);
293 if (chanctx_conf)
294 pos += scnprintf(buf+pos, bufsz-pos,
295 "idle rx chains %d, active rx chains: %d\n",
296 chanctx_conf->rx_chains_static,
297 chanctx_conf->rx_chains_dynamic);
298 rcu_read_unlock();
299
300 mutex_unlock(&mvm->mutex);
301
302 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
303 }
304
305 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
306 enum iwl_dbgfs_bf_mask param, int value)
307 {
308 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
309 struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
310
311 dbgfs_bf->mask |= param;
312
313 switch (param) {
314 case MVM_DEBUGFS_BF_ENERGY_DELTA:
315 dbgfs_bf->bf_energy_delta = value;
316 break;
317 case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
318 dbgfs_bf->bf_roaming_energy_delta = value;
319 break;
320 case MVM_DEBUGFS_BF_ROAMING_STATE:
321 dbgfs_bf->bf_roaming_state = value;
322 break;
323 case MVM_DEBUGFS_BF_TEMP_THRESHOLD:
324 dbgfs_bf->bf_temp_threshold = value;
325 break;
326 case MVM_DEBUGFS_BF_TEMP_FAST_FILTER:
327 dbgfs_bf->bf_temp_fast_filter = value;
328 break;
329 case MVM_DEBUGFS_BF_TEMP_SLOW_FILTER:
330 dbgfs_bf->bf_temp_slow_filter = value;
331 break;
332 case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
333 dbgfs_bf->bf_enable_beacon_filter = value;
334 break;
335 case MVM_DEBUGFS_BF_DEBUG_FLAG:
336 dbgfs_bf->bf_debug_flag = value;
337 break;
338 case MVM_DEBUGFS_BF_ESCAPE_TIMER:
339 dbgfs_bf->bf_escape_timer = value;
340 break;
341 case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
342 dbgfs_bf->ba_enable_beacon_abort = value;
343 break;
344 case MVM_DEBUGFS_BA_ESCAPE_TIMER:
345 dbgfs_bf->ba_escape_timer = value;
346 break;
347 }
348 }
349
350 static ssize_t iwl_dbgfs_bf_params_write(struct ieee80211_vif *vif, char *buf,
351 size_t count, loff_t *ppos)
352 {
353 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
354 struct iwl_mvm *mvm = mvmvif->mvm;
355 enum iwl_dbgfs_bf_mask param;
356 int value, ret = 0;
357
358 if (!strncmp("bf_energy_delta=", buf, 16)) {
359 if (sscanf(buf+16, "%d", &value) != 1)
360 return -EINVAL;
361 if (value < IWL_BF_ENERGY_DELTA_MIN ||
362 value > IWL_BF_ENERGY_DELTA_MAX)
363 return -EINVAL;
364 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
365 } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
366 if (sscanf(buf+24, "%d", &value) != 1)
367 return -EINVAL;
368 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
369 value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
370 return -EINVAL;
371 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
372 } else if (!strncmp("bf_roaming_state=", buf, 17)) {
373 if (sscanf(buf+17, "%d", &value) != 1)
374 return -EINVAL;
375 if (value < IWL_BF_ROAMING_STATE_MIN ||
376 value > IWL_BF_ROAMING_STATE_MAX)
377 return -EINVAL;
378 param = MVM_DEBUGFS_BF_ROAMING_STATE;
379 } else if (!strncmp("bf_temp_threshold=", buf, 18)) {
380 if (sscanf(buf+18, "%d", &value) != 1)
381 return -EINVAL;
382 if (value < IWL_BF_TEMP_THRESHOLD_MIN ||
383 value > IWL_BF_TEMP_THRESHOLD_MAX)
384 return -EINVAL;
385 param = MVM_DEBUGFS_BF_TEMP_THRESHOLD;
386 } else if (!strncmp("bf_temp_fast_filter=", buf, 20)) {
387 if (sscanf(buf+20, "%d", &value) != 1)
388 return -EINVAL;
389 if (value < IWL_BF_TEMP_FAST_FILTER_MIN ||
390 value > IWL_BF_TEMP_FAST_FILTER_MAX)
391 return -EINVAL;
392 param = MVM_DEBUGFS_BF_TEMP_FAST_FILTER;
393 } else if (!strncmp("bf_temp_slow_filter=", buf, 20)) {
394 if (sscanf(buf+20, "%d", &value) != 1)
395 return -EINVAL;
396 if (value < IWL_BF_TEMP_SLOW_FILTER_MIN ||
397 value > IWL_BF_TEMP_SLOW_FILTER_MAX)
398 return -EINVAL;
399 param = MVM_DEBUGFS_BF_TEMP_SLOW_FILTER;
400 } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
401 if (sscanf(buf+24, "%d", &value) != 1)
402 return -EINVAL;
403 if (value < 0 || value > 1)
404 return -EINVAL;
405 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
406 } else if (!strncmp("bf_debug_flag=", buf, 14)) {
407 if (sscanf(buf+14, "%d", &value) != 1)
408 return -EINVAL;
409 if (value < 0 || value > 1)
410 return -EINVAL;
411 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
412 } else if (!strncmp("bf_escape_timer=", buf, 16)) {
413 if (sscanf(buf+16, "%d", &value) != 1)
414 return -EINVAL;
415 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
416 value > IWL_BF_ESCAPE_TIMER_MAX)
417 return -EINVAL;
418 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
419 } else if (!strncmp("ba_escape_timer=", buf, 16)) {
420 if (sscanf(buf+16, "%d", &value) != 1)
421 return -EINVAL;
422 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
423 value > IWL_BA_ESCAPE_TIMER_MAX)
424 return -EINVAL;
425 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
426 } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
427 if (sscanf(buf+23, "%d", &value) != 1)
428 return -EINVAL;
429 if (value < 0 || value > 1)
430 return -EINVAL;
431 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
432 } else {
433 return -EINVAL;
434 }
435
436 mutex_lock(&mvm->mutex);
437 iwl_dbgfs_update_bf(vif, param, value);
438 if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value)
439 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
440 else
441 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
442 mutex_unlock(&mvm->mutex);
443
444 return ret ?: count;
445 }
446
447 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
448 char __user *user_buf,
449 size_t count, loff_t *ppos)
450 {
451 struct ieee80211_vif *vif = file->private_data;
452 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
453 char buf[256];
454 int pos = 0;
455 const size_t bufsz = sizeof(buf);
456 struct iwl_beacon_filter_cmd cmd = {
457 IWL_BF_CMD_CONFIG_DEFAULTS,
458 .bf_enable_beacon_filter =
459 cpu_to_le32(IWL_BF_ENABLE_BEACON_FILTER_DEFAULT),
460 .ba_enable_beacon_abort =
461 cpu_to_le32(IWL_BA_ENABLE_BEACON_ABORT_DEFAULT),
462 };
463
464 iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
465 if (mvmvif->bf_data.bf_enabled)
466 cmd.bf_enable_beacon_filter = cpu_to_le32(1);
467 else
468 cmd.bf_enable_beacon_filter = 0;
469
470 pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
471 le32_to_cpu(cmd.bf_energy_delta));
472 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
473 le32_to_cpu(cmd.bf_roaming_energy_delta));
474 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
475 le32_to_cpu(cmd.bf_roaming_state));
476 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_threshold = %d\n",
477 le32_to_cpu(cmd.bf_temp_threshold));
478 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_fast_filter = %d\n",
479 le32_to_cpu(cmd.bf_temp_fast_filter));
480 pos += scnprintf(buf+pos, bufsz-pos, "bf_temp_slow_filter = %d\n",
481 le32_to_cpu(cmd.bf_temp_slow_filter));
482 pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
483 le32_to_cpu(cmd.bf_enable_beacon_filter));
484 pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
485 le32_to_cpu(cmd.bf_debug_flag));
486 pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
487 le32_to_cpu(cmd.bf_escape_timer));
488 pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
489 le32_to_cpu(cmd.ba_escape_timer));
490 pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
491 le32_to_cpu(cmd.ba_enable_beacon_abort));
492
493 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
494 }
495
496 static inline char *iwl_dbgfs_is_match(char *name, char *buf)
497 {
498 int len = strlen(name);
499
500 return !strncmp(name, buf, len) ? buf + len : NULL;
501 }
502
503 static ssize_t iwl_dbgfs_os_device_timediff_read(struct file *file,
504 char __user *user_buf,
505 size_t count, loff_t *ppos)
506 {
507 struct ieee80211_vif *vif = file->private_data;
508 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
509 struct iwl_mvm *mvm = mvmvif->mvm;
510 u32 curr_gp2;
511 u64 curr_os;
512 s64 diff;
513 char buf[64];
514 const size_t bufsz = sizeof(buf);
515 int pos = 0;
516
517 iwl_mvm_get_sync_time(mvm, &curr_gp2, &curr_os);
518 do_div(curr_os, NSEC_PER_USEC);
519 diff = curr_os - curr_gp2;
520 pos += scnprintf(buf + pos, bufsz - pos, "diff=%lld\n", diff);
521
522 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
523 }
524
525 static ssize_t iwl_dbgfs_low_latency_write(struct ieee80211_vif *vif, char *buf,
526 size_t count, loff_t *ppos)
527 {
528 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
529 struct iwl_mvm *mvm = mvmvif->mvm;
530 u8 value;
531 int ret;
532
533 ret = kstrtou8(buf, 0, &value);
534 if (ret)
535 return ret;
536 if (value > 1)
537 return -EINVAL;
538
539 mutex_lock(&mvm->mutex);
540 iwl_mvm_update_low_latency(mvm, vif, value, LOW_LATENCY_DEBUGFS);
541 mutex_unlock(&mvm->mutex);
542
543 return count;
544 }
545
546 static ssize_t
547 iwl_dbgfs_low_latency_force_write(struct ieee80211_vif *vif, char *buf,
548 size_t count, loff_t *ppos)
549 {
550 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
551 struct iwl_mvm *mvm = mvmvif->mvm;
552 u8 value;
553 int ret;
554
555 ret = kstrtou8(buf, 0, &value);
556 if (ret)
557 return ret;
558
559 if (value > NUM_LOW_LATENCY_FORCE)
560 return -EINVAL;
561
562 mutex_lock(&mvm->mutex);
563 if (value == LOW_LATENCY_FORCE_UNSET) {
564 iwl_mvm_update_low_latency(mvm, vif, false,
565 LOW_LATENCY_DEBUGFS_FORCE);
566 iwl_mvm_update_low_latency(mvm, vif, false,
567 LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
568 } else {
569 iwl_mvm_update_low_latency(mvm, vif,
570 value == LOW_LATENCY_FORCE_ON,
571 LOW_LATENCY_DEBUGFS_FORCE);
572 iwl_mvm_update_low_latency(mvm, vif, true,
573 LOW_LATENCY_DEBUGFS_FORCE_ENABLE);
574 }
575 mutex_unlock(&mvm->mutex);
576 return count;
577 }
578
579 static ssize_t iwl_dbgfs_low_latency_read(struct file *file,
580 char __user *user_buf,
581 size_t count, loff_t *ppos)
582 {
583 struct ieee80211_vif *vif = file->private_data;
584 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
585 char format[] = "traffic=%d\ndbgfs=%d\nvcmd=%d\nvif_type=%d\n"
586 "dbgfs_force_enable=%d\ndbgfs_force=%d\nactual=%d\n";
587
588 /*
589 * all values in format are boolean so the size of format is enough
590 * for holding the result string
591 */
592 char buf[sizeof(format) + 1] = {};
593 int len;
594
595 len = scnprintf(buf, sizeof(buf) - 1, format,
596 !!(mvmvif->low_latency & LOW_LATENCY_TRAFFIC),
597 !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS),
598 !!(mvmvif->low_latency & LOW_LATENCY_VCMD),
599 !!(mvmvif->low_latency & LOW_LATENCY_VIF_TYPE),
600 !!(mvmvif->low_latency &
601 LOW_LATENCY_DEBUGFS_FORCE_ENABLE),
602 !!(mvmvif->low_latency & LOW_LATENCY_DEBUGFS_FORCE),
603 !!(mvmvif->low_latency_actual));
604 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
605 }
606
607 static ssize_t iwl_dbgfs_uapsd_misbehaving_read(struct file *file,
608 char __user *user_buf,
609 size_t count, loff_t *ppos)
610 {
611 struct ieee80211_vif *vif = file->private_data;
612 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
613 char buf[20];
614 int len;
615
616 len = sprintf(buf, "%pM\n", mvmvif->uapsd_misbehaving_bssid);
617 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
618 }
619
620 static ssize_t iwl_dbgfs_uapsd_misbehaving_write(struct ieee80211_vif *vif,
621 char *buf, size_t count,
622 loff_t *ppos)
623 {
624 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
625 struct iwl_mvm *mvm = mvmvif->mvm;
626 bool ret;
627
628 mutex_lock(&mvm->mutex);
629 ret = mac_pton(buf, mvmvif->uapsd_misbehaving_bssid);
630 mutex_unlock(&mvm->mutex);
631
632 return ret ? count : -EINVAL;
633 }
634
635 static ssize_t iwl_dbgfs_rx_phyinfo_write(struct ieee80211_vif *vif, char *buf,
636 size_t count, loff_t *ppos)
637 {
638 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
639 struct iwl_mvm *mvm = mvmvif->mvm;
640 struct ieee80211_chanctx_conf *chanctx_conf;
641 struct iwl_mvm_phy_ctxt *phy_ctxt;
642 u16 value;
643 int ret;
644
645 ret = kstrtou16(buf, 0, &value);
646 if (ret)
647 return ret;
648
649 mutex_lock(&mvm->mutex);
650 rcu_read_lock();
651
652 chanctx_conf = rcu_dereference(vif->chanctx_conf);
653 /* make sure the channel context is assigned */
654 if (!chanctx_conf) {
655 rcu_read_unlock();
656 mutex_unlock(&mvm->mutex);
657 return -EINVAL;
658 }
659
660 phy_ctxt = &mvm->phy_ctxts[*(u16 *)chanctx_conf->drv_priv];
661 rcu_read_unlock();
662
663 mvm->dbgfs_rx_phyinfo = value;
664
665 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chanctx_conf->min_def,
666 chanctx_conf->rx_chains_static,
667 chanctx_conf->rx_chains_dynamic);
668 mutex_unlock(&mvm->mutex);
669
670 return ret ?: count;
671 }
672
673 static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file,
674 char __user *user_buf,
675 size_t count, loff_t *ppos)
676 {
677 struct ieee80211_vif *vif = file->private_data;
678 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
679 char buf[8];
680 int len;
681
682 len = scnprintf(buf, sizeof(buf), "0x%04x\n",
683 mvmvif->mvm->dbgfs_rx_phyinfo);
684
685 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
686 }
687
688 static void iwl_dbgfs_quota_check(void *data, u8 *mac,
689 struct ieee80211_vif *vif)
690 {
691 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
692 int *ret = data;
693
694 if (mvmvif->dbgfs_quota_min)
695 *ret = -EINVAL;
696 }
697
698 static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf,
699 size_t count, loff_t *ppos)
700 {
701 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
702 struct iwl_mvm *mvm = mvmvif->mvm;
703 u16 value;
704 int ret;
705
706 ret = kstrtou16(buf, 0, &value);
707 if (ret)
708 return ret;
709
710 if (value > 95)
711 return -EINVAL;
712
713 mutex_lock(&mvm->mutex);
714
715 mvmvif->dbgfs_quota_min = 0;
716 ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
717 iwl_dbgfs_quota_check, &ret);
718 if (ret == 0) {
719 mvmvif->dbgfs_quota_min = value;
720 iwl_mvm_update_quotas(mvm, false, NULL);
721 }
722 mutex_unlock(&mvm->mutex);
723
724 return ret ?: count;
725 }
726
727 static ssize_t iwl_dbgfs_quota_min_read(struct file *file,
728 char __user *user_buf,
729 size_t count, loff_t *ppos)
730 {
731 struct ieee80211_vif *vif = file->private_data;
732 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
733 char buf[10];
734 int len;
735
736 len = scnprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min);
737
738 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
739 }
740
741 #define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \
742 _MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
743 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
744 _MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)
745 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do { \
746 if (!debugfs_create_file(#name, mode, parent, vif, \
747 &iwl_dbgfs_##name##_ops)) \
748 goto err; \
749 } while (0)
750
751 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
752 MVM_DEBUGFS_READ_FILE_OPS(tx_pwr_lmt);
753 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params, 32);
754 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params, 256);
755 MVM_DEBUGFS_READ_WRITE_FILE_OPS(low_latency, 10);
756 MVM_DEBUGFS_WRITE_FILE_OPS(low_latency_force, 10);
757 MVM_DEBUGFS_READ_WRITE_FILE_OPS(uapsd_misbehaving, 20);
758 MVM_DEBUGFS_READ_WRITE_FILE_OPS(rx_phyinfo, 10);
759 MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);
760 MVM_DEBUGFS_READ_FILE_OPS(os_device_timediff);
761
762
763 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
764 {
765 struct dentry *dbgfs_dir = vif->debugfs_dir;
766 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
767 char buf[100];
768
769 /*
770 * Check if debugfs directory already exist before creating it.
771 * This may happen when, for example, resetting hw or suspend-resume
772 */
773 if (!dbgfs_dir || mvmvif->dbgfs_dir)
774 return;
775
776 mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
777 if (IS_ERR_OR_NULL(mvmvif->dbgfs_dir)) {
778 IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n",
779 dbgfs_dir);
780 return;
781 }
782
783 if (!mvmvif->dbgfs_dir) {
784 IWL_ERR(mvm, "Failed to create debugfs directory under %pd\n",
785 dbgfs_dir);
786 return;
787 }
788
789 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
790 ((vif->type == NL80211_IFTYPE_STATION && !vif->p2p) ||
791 (vif->type == NL80211_IFTYPE_STATION && vif->p2p)))
792 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, 0600);
793
794 MVM_DEBUGFS_ADD_FILE_VIF(tx_pwr_lmt, mvmvif->dbgfs_dir, 0400);
795 MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir, 0400);
796 MVM_DEBUGFS_ADD_FILE_VIF(low_latency, mvmvif->dbgfs_dir, 0600);
797 MVM_DEBUGFS_ADD_FILE_VIF(low_latency_force, mvmvif->dbgfs_dir, 0600);
798 MVM_DEBUGFS_ADD_FILE_VIF(uapsd_misbehaving, mvmvif->dbgfs_dir, 0600);
799 MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir, 0600);
800 MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir, 0600);
801 MVM_DEBUGFS_ADD_FILE_VIF(os_device_timediff, mvmvif->dbgfs_dir, 0400);
802
803 if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
804 mvmvif == mvm->bf_allowed_vif)
805 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir, 0600);
806
807 /*
808 * Create symlink for convenience pointing to interface specific
809 * debugfs entries for the driver. For example, under
810 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
811 * find
812 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
813 */
814 snprintf(buf, 100, "../../../%pd3/%pd",
815 dbgfs_dir,
816 mvmvif->dbgfs_dir);
817
818 mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
819 mvm->debugfs_dir, buf);
820 if (!mvmvif->dbgfs_slink)
821 IWL_ERR(mvm, "Can't create debugfs symbolic link under %pd\n",
822 dbgfs_dir);
823 return;
824 err:
825 IWL_ERR(mvm, "Can't create debugfs entity\n");
826 }
827
828 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
829 {
830 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
831
832 debugfs_remove(mvmvif->dbgfs_slink);
833 mvmvif->dbgfs_slink = NULL;
834
835 debugfs_remove_recursive(mvmvif->dbgfs_dir);
836 mvmvif->dbgfs_dir = NULL;
837 }
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