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Linux 3.11-rc3
[cris-mirror.git] / drivers / net / wireless / iwlwifi / mvm / debugfs.c
blobe56ed2a848886ce6c9001ef9a69a12d54c5f102b
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 - 2013 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63 #include "mvm.h"
64 #include "sta.h"
65 #include "iwl-io.h"
66
67 struct iwl_dbgfs_mvm_ctx {
68 struct iwl_mvm *mvm;
69 struct ieee80211_vif *vif;
70 };
71
72 static ssize_t iwl_dbgfs_tx_flush_write(struct file *file,
73 const char __user *user_buf,
74 size_t count, loff_t *ppos)
75 {
76 struct iwl_mvm *mvm = file->private_data;
77
78 char buf[16];
79 int buf_size, ret;
80 u32 scd_q_msk;
81
82 if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
83 return -EIO;
84
85 memset(buf, 0, sizeof(buf));
86 buf_size = min(count, sizeof(buf) - 1);
87 if (copy_from_user(buf, user_buf, buf_size))
88 return -EFAULT;
89
90 if (sscanf(buf, "%x", &scd_q_msk) != 1)
91 return -EINVAL;
92
93 IWL_ERR(mvm, "FLUSHING queues: scd_q_msk = 0x%x\n", scd_q_msk);
94
95 mutex_lock(&mvm->mutex);
96 ret = iwl_mvm_flush_tx_path(mvm, scd_q_msk, true) ? : count;
97 mutex_unlock(&mvm->mutex);
98
99 return ret;
100 }
101
102 static ssize_t iwl_dbgfs_sta_drain_write(struct file *file,
103 const char __user *user_buf,
104 size_t count, loff_t *ppos)
105 {
106 struct iwl_mvm *mvm = file->private_data;
107 struct ieee80211_sta *sta;
108
109 char buf[8];
110 int buf_size, sta_id, drain, ret;
111
112 if (!mvm->ucode_loaded || mvm->cur_ucode != IWL_UCODE_REGULAR)
113 return -EIO;
114
115 memset(buf, 0, sizeof(buf));
116 buf_size = min(count, sizeof(buf) - 1);
117 if (copy_from_user(buf, user_buf, buf_size))
118 return -EFAULT;
119
120 if (sscanf(buf, "%d %d", &sta_id, &drain) != 2)
121 return -EINVAL;
122
123 mutex_lock(&mvm->mutex);
124
125 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[sta_id],
126 lockdep_is_held(&mvm->mutex));
127 if (IS_ERR_OR_NULL(sta))
128 ret = -ENOENT;
129 else
130 ret = iwl_mvm_drain_sta(mvm, (void *)sta->drv_priv, drain) ? :
131 count;
132
133 mutex_unlock(&mvm->mutex);
134
135 return ret;
136 }
137
138 static ssize_t iwl_dbgfs_sram_read(struct file *file, char __user *user_buf,
139 size_t count, loff_t *ppos)
140 {
141 struct iwl_mvm *mvm = file->private_data;
142 const struct fw_img *img;
143 int ofs, len, pos = 0;
144 size_t bufsz, ret;
145 char *buf;
146 u8 *ptr;
147
148 if (!mvm->ucode_loaded)
149 return -EINVAL;
150
151 /* default is to dump the entire data segment */
152 if (!mvm->dbgfs_sram_offset && !mvm->dbgfs_sram_len) {
153 img = &mvm->fw->img[mvm->cur_ucode];
154 ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
155 len = img->sec[IWL_UCODE_SECTION_DATA].len;
156 } else {
157 ofs = mvm->dbgfs_sram_offset;
158 len = mvm->dbgfs_sram_len;
159 }
160
161 bufsz = len * 4 + 256;
162 buf = kzalloc(bufsz, GFP_KERNEL);
163 if (!buf)
164 return -ENOMEM;
165
166 ptr = kzalloc(len, GFP_KERNEL);
167 if (!ptr) {
168 kfree(buf);
169 return -ENOMEM;
170 }
171
172 pos += scnprintf(buf + pos, bufsz - pos, "sram_len: 0x%x\n", len);
173 pos += scnprintf(buf + pos, bufsz - pos, "sram_offset: 0x%x\n", ofs);
174
175 iwl_trans_read_mem_bytes(mvm->trans, ofs, ptr, len);
176 for (ofs = 0; ofs < len; ofs += 16) {
177 pos += scnprintf(buf + pos, bufsz - pos, "0x%.4x ", ofs);
178 hex_dump_to_buffer(ptr + ofs, 16, 16, 1, buf + pos,
179 bufsz - pos, false);
180 pos += strlen(buf + pos);
181 if (bufsz - pos > 0)
182 buf[pos++] = '\n';
183 }
184
185 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
186
187 kfree(buf);
188 kfree(ptr);
189
190 return ret;
191 }
192
193 static ssize_t iwl_dbgfs_sram_write(struct file *file,
194 const char __user *user_buf, size_t count,
195 loff_t *ppos)
196 {
197 struct iwl_mvm *mvm = file->private_data;
198 char buf[64];
199 int buf_size;
200 u32 offset, len;
201
202 memset(buf, 0, sizeof(buf));
203 buf_size = min(count, sizeof(buf) - 1);
204 if (copy_from_user(buf, user_buf, buf_size))
205 return -EFAULT;
206
207 if (sscanf(buf, "%x,%x", &offset, &len) == 2) {
208 if ((offset & 0x3) || (len & 0x3))
209 return -EINVAL;
210 mvm->dbgfs_sram_offset = offset;
211 mvm->dbgfs_sram_len = len;
212 } else {
213 mvm->dbgfs_sram_offset = 0;
214 mvm->dbgfs_sram_len = 0;
215 }
216
217 return count;
218 }
219
220 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
221 size_t count, loff_t *ppos)
222 {
223 struct iwl_mvm *mvm = file->private_data;
224 struct ieee80211_sta *sta;
225 char buf[400];
226 int i, pos = 0, bufsz = sizeof(buf);
227
228 mutex_lock(&mvm->mutex);
229
230 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
231 pos += scnprintf(buf + pos, bufsz - pos, "%.2d: ", i);
232 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
233 lockdep_is_held(&mvm->mutex));
234 if (!sta)
235 pos += scnprintf(buf + pos, bufsz - pos, "N/A\n");
236 else if (IS_ERR(sta))
237 pos += scnprintf(buf + pos, bufsz - pos, "%ld\n",
238 PTR_ERR(sta));
239 else
240 pos += scnprintf(buf + pos, bufsz - pos, "%pM\n",
241 sta->addr);
242 }
243
244 mutex_unlock(&mvm->mutex);
245
246 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
247 }
248
249 static ssize_t iwl_dbgfs_power_down_allow_write(struct file *file,
250 const char __user *user_buf,
251 size_t count, loff_t *ppos)
252 {
253 struct iwl_mvm *mvm = file->private_data;
254 char buf[8] = {};
255 int allow;
256
257 if (!mvm->ucode_loaded)
258 return -EIO;
259
260 if (copy_from_user(buf, user_buf, sizeof(buf)))
261 return -EFAULT;
262
263 if (sscanf(buf, "%d", &allow) != 1)
264 return -EINVAL;
265
266 IWL_DEBUG_POWER(mvm, "%s device power down\n",
267 allow ? "allow" : "prevent");
268
269 /*
270 * TODO: Send REPLY_DEBUG_CMD (0xf0) when FW support it
271 */
272
273 return count;
274 }
275
276 static ssize_t iwl_dbgfs_power_down_d3_allow_write(struct file *file,
277 const char __user *user_buf,
278 size_t count, loff_t *ppos)
279 {
280 struct iwl_mvm *mvm = file->private_data;
281 char buf[8] = {};
282 int allow;
283
284 if (copy_from_user(buf, user_buf, sizeof(buf)))
285 return -EFAULT;
286
287 if (sscanf(buf, "%d", &allow) != 1)
288 return -EINVAL;
289
290 IWL_DEBUG_POWER(mvm, "%s device power down in d3\n",
291 allow ? "allow" : "prevent");
292
293 /*
294 * TODO: When WoWLAN FW alive notification happens, driver will send
295 * REPLY_DEBUG_CMD setting power_down_allow flag according to
296 * mvm->prevent_power_down_d3
297 */
298 mvm->prevent_power_down_d3 = !allow;
299
300 return count;
301 }
302
303 static void iwl_dbgfs_update_pm(struct iwl_mvm *mvm,
304 struct ieee80211_vif *vif,
305 enum iwl_dbgfs_pm_mask param, int val)
306 {
307 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
308 struct iwl_dbgfs_pm *dbgfs_pm = &mvmvif->dbgfs_pm;
309
310 dbgfs_pm->mask |= param;
311
312 switch (param) {
313 case MVM_DEBUGFS_PM_KEEP_ALIVE: {
314 struct ieee80211_hw *hw = mvm->hw;
315 int dtimper = hw->conf.ps_dtim_period ?: 1;
316 int dtimper_msec = dtimper * vif->bss_conf.beacon_int;
317
318 IWL_DEBUG_POWER(mvm, "debugfs: set keep_alive= %d sec\n", val);
319 if (val * MSEC_PER_SEC < 3 * dtimper_msec) {
320 IWL_WARN(mvm,
321 "debugfs: keep alive period (%ld msec) is less than minimum required (%d msec)\n",
322 val * MSEC_PER_SEC, 3 * dtimper_msec);
323 }
324 dbgfs_pm->keep_alive_seconds = val;
325 break;
326 }
327 case MVM_DEBUGFS_PM_SKIP_OVER_DTIM:
328 IWL_DEBUG_POWER(mvm, "skip_over_dtim %s\n",
329 val ? "enabled" : "disabled");
330 dbgfs_pm->skip_over_dtim = val;
331 break;
332 case MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS:
333 IWL_DEBUG_POWER(mvm, "skip_dtim_periods=%d\n", val);
334 dbgfs_pm->skip_dtim_periods = val;
335 break;
336 case MVM_DEBUGFS_PM_RX_DATA_TIMEOUT:
337 IWL_DEBUG_POWER(mvm, "rx_data_timeout=%d\n", val);
338 dbgfs_pm->rx_data_timeout = val;
339 break;
340 case MVM_DEBUGFS_PM_TX_DATA_TIMEOUT:
341 IWL_DEBUG_POWER(mvm, "tx_data_timeout=%d\n", val);
342 dbgfs_pm->tx_data_timeout = val;
343 break;
344 case MVM_DEBUGFS_PM_DISABLE_POWER_OFF:
345 IWL_DEBUG_POWER(mvm, "disable_power_off=%d\n", val);
346 dbgfs_pm->disable_power_off = val;
347 case MVM_DEBUGFS_PM_LPRX_ENA:
348 IWL_DEBUG_POWER(mvm, "lprx %s\n", val ? "enabled" : "disabled");
349 dbgfs_pm->lprx_ena = val;
350 break;
351 case MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD:
352 IWL_DEBUG_POWER(mvm, "lprx_rssi_threshold=%d\n", val);
353 dbgfs_pm->lprx_rssi_threshold = val;
354 break;
355 }
356 }
357
358 static ssize_t iwl_dbgfs_pm_params_write(struct file *file,
359 const char __user *user_buf,
360 size_t count, loff_t *ppos)
361 {
362 struct ieee80211_vif *vif = file->private_data;
363 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
364 struct iwl_mvm *mvm = mvmvif->dbgfs_data;
365 enum iwl_dbgfs_pm_mask param;
366 char buf[32] = {};
367 int val;
368 int ret;
369
370 if (copy_from_user(buf, user_buf, sizeof(buf)))
371 return -EFAULT;
372
373 if (!strncmp("keep_alive=", buf, 11)) {
374 if (sscanf(buf + 11, "%d", &val) != 1)
375 return -EINVAL;
376 param = MVM_DEBUGFS_PM_KEEP_ALIVE;
377 } else if (!strncmp("skip_over_dtim=", buf, 15)) {
378 if (sscanf(buf + 15, "%d", &val) != 1)
379 return -EINVAL;
380 param = MVM_DEBUGFS_PM_SKIP_OVER_DTIM;
381 } else if (!strncmp("skip_dtim_periods=", buf, 18)) {
382 if (sscanf(buf + 18, "%d", &val) != 1)
383 return -EINVAL;
384 param = MVM_DEBUGFS_PM_SKIP_DTIM_PERIODS;
385 } else if (!strncmp("rx_data_timeout=", buf, 16)) {
386 if (sscanf(buf + 16, "%d", &val) != 1)
387 return -EINVAL;
388 param = MVM_DEBUGFS_PM_RX_DATA_TIMEOUT;
389 } else if (!strncmp("tx_data_timeout=", buf, 16)) {
390 if (sscanf(buf + 16, "%d", &val) != 1)
391 return -EINVAL;
392 param = MVM_DEBUGFS_PM_TX_DATA_TIMEOUT;
393 } else if (!strncmp("disable_power_off=", buf, 18)) {
394 if (sscanf(buf + 18, "%d", &val) != 1)
395 return -EINVAL;
396 param = MVM_DEBUGFS_PM_DISABLE_POWER_OFF;
397 } else if (!strncmp("lprx=", buf, 5)) {
398 if (sscanf(buf + 5, "%d", &val) != 1)
399 return -EINVAL;
400 param = MVM_DEBUGFS_PM_LPRX_ENA;
401 } else if (!strncmp("lprx_rssi_threshold=", buf, 20)) {
402 if (sscanf(buf + 20, "%d", &val) != 1)
403 return -EINVAL;
404 if (val > POWER_LPRX_RSSI_THRESHOLD_MAX || val <
405 POWER_LPRX_RSSI_THRESHOLD_MIN)
406 return -EINVAL;
407 param = MVM_DEBUGFS_PM_LPRX_RSSI_THRESHOLD;
408 } else {
409 return -EINVAL;
410 }
411
412 mutex_lock(&mvm->mutex);
413 iwl_dbgfs_update_pm(mvm, vif, param, val);
414 ret = iwl_mvm_power_update_mode(mvm, vif);
415 mutex_unlock(&mvm->mutex);
416
417 return ret ?: count;
418 }
419
420 static ssize_t iwl_dbgfs_pm_params_read(struct file *file,
421 char __user *user_buf,
422 size_t count, loff_t *ppos)
423 {
424 struct ieee80211_vif *vif = file->private_data;
425 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
426 struct iwl_mvm *mvm = mvmvif->dbgfs_data;
427 struct iwl_powertable_cmd cmd = {};
428 char buf[256];
429 int bufsz = sizeof(buf);
430 int pos = 0;
431
432 iwl_mvm_power_build_cmd(mvm, vif, &cmd);
433
434 pos += scnprintf(buf+pos, bufsz-pos, "disable_power_off = %d\n",
435 (cmd.flags &
436 cpu_to_le16(POWER_FLAGS_POWER_SAVE_ENA_MSK)) ?
437 0 : 1);
438 pos += scnprintf(buf+pos, bufsz-pos, "skip_dtim_periods = %d\n",
439 le32_to_cpu(cmd.skip_dtim_periods));
440 pos += scnprintf(buf+pos, bufsz-pos, "power_scheme = %d\n",
441 iwlmvm_mod_params.power_scheme);
442 pos += scnprintf(buf+pos, bufsz-pos, "flags = 0x%x\n",
443 le16_to_cpu(cmd.flags));
444 pos += scnprintf(buf+pos, bufsz-pos, "keep_alive = %d\n",
445 cmd.keep_alive_seconds);
446
447 if (cmd.flags & cpu_to_le16(POWER_FLAGS_POWER_MANAGEMENT_ENA_MSK)) {
448 pos += scnprintf(buf+pos, bufsz-pos, "skip_over_dtim = %d\n",
449 (cmd.flags &
450 cpu_to_le16(POWER_FLAGS_SKIP_OVER_DTIM_MSK)) ?
451 1 : 0);
452 pos += scnprintf(buf+pos, bufsz-pos, "rx_data_timeout = %d\n",
453 le32_to_cpu(cmd.rx_data_timeout));
454 pos += scnprintf(buf+pos, bufsz-pos, "tx_data_timeout = %d\n",
455 le32_to_cpu(cmd.tx_data_timeout));
456 if (cmd.flags & cpu_to_le16(POWER_FLAGS_LPRX_ENA_MSK))
457 pos += scnprintf(buf+pos, bufsz-pos,
458 "lprx_rssi_threshold = %d\n",
459 le32_to_cpu(cmd.lprx_rssi_threshold));
460 }
461
462 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
463 }
464
465 static ssize_t iwl_dbgfs_mac_params_read(struct file *file,
466 char __user *user_buf,
467 size_t count, loff_t *ppos)
468 {
469 struct ieee80211_vif *vif = file->private_data;
470 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
471 struct iwl_mvm *mvm = mvmvif->dbgfs_data;
472 u8 ap_sta_id;
473 struct ieee80211_chanctx_conf *chanctx_conf;
474 char buf[512];
475 int bufsz = sizeof(buf);
476 int pos = 0;
477 int i;
478
479 mutex_lock(&mvm->mutex);
480
481 ap_sta_id = mvmvif->ap_sta_id;
482
483 pos += scnprintf(buf+pos, bufsz-pos, "mac id/color: %d / %d\n",
484 mvmvif->id, mvmvif->color);
485 pos += scnprintf(buf+pos, bufsz-pos, "bssid: %pM\n",
486 vif->bss_conf.bssid);
487 pos += scnprintf(buf+pos, bufsz-pos, "QoS:\n");
488 for (i = 0; i < ARRAY_SIZE(mvmvif->queue_params); i++) {
489 pos += scnprintf(buf+pos, bufsz-pos,
490 "\t%d: txop:%d - cw_min:%d - cw_max = %d - aifs = %d upasd = %d\n",
491 i, mvmvif->queue_params[i].txop,
492 mvmvif->queue_params[i].cw_min,
493 mvmvif->queue_params[i].cw_max,
494 mvmvif->queue_params[i].aifs,
495 mvmvif->queue_params[i].uapsd);
496 }
497
498 if (vif->type == NL80211_IFTYPE_STATION &&
499 ap_sta_id != IWL_MVM_STATION_COUNT) {
500 struct ieee80211_sta *sta;
501 struct iwl_mvm_sta *mvm_sta;
502
503 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[ap_sta_id],
504 lockdep_is_held(&mvm->mutex));
505 mvm_sta = (void *)sta->drv_priv;
506 pos += scnprintf(buf+pos, bufsz-pos,
507 "ap_sta_id %d - reduced Tx power %d\n",
508 ap_sta_id, mvm_sta->bt_reduced_txpower);
509 }
510
511 rcu_read_lock();
512 chanctx_conf = rcu_dereference(vif->chanctx_conf);
513 if (chanctx_conf) {
514 pos += scnprintf(buf+pos, bufsz-pos,
515 "idle rx chains %d, active rx chains: %d\n",
516 chanctx_conf->rx_chains_static,
517 chanctx_conf->rx_chains_dynamic);
518 }
519 rcu_read_unlock();
520
521 mutex_unlock(&mvm->mutex);
522
523 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
524 }
525
526 #define BT_MBOX_MSG(_notif, _num, _field) \
527 ((le32_to_cpu((_notif)->mbox_msg[(_num)]) & BT_MBOX##_num##_##_field)\
528 >> BT_MBOX##_num##_##_field##_POS)
529
530
531 #define BT_MBOX_PRINT(_num, _field, _end) \
532 pos += scnprintf(buf + pos, bufsz - pos, \
533 "\t%s: %d%s", \
534 #_field, \
535 BT_MBOX_MSG(notif, _num, _field), \
536 true ? "\n" : ", ");
537
538 static ssize_t iwl_dbgfs_bt_notif_read(struct file *file, char __user *user_buf,
539 size_t count, loff_t *ppos)
540 {
541 struct iwl_mvm *mvm = file->private_data;
542 struct iwl_bt_coex_profile_notif *notif = &mvm->last_bt_notif;
543 char *buf;
544 int ret, pos = 0, bufsz = sizeof(char) * 1024;
545
546 buf = kmalloc(bufsz, GFP_KERNEL);
547 if (!buf)
548 return -ENOMEM;
549
550 mutex_lock(&mvm->mutex);
551
552 pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw0:\n");
553
554 BT_MBOX_PRINT(0, LE_SLAVE_LAT, false);
555 BT_MBOX_PRINT(0, LE_PROF1, false);
556 BT_MBOX_PRINT(0, LE_PROF2, false);
557 BT_MBOX_PRINT(0, LE_PROF_OTHER, false);
558 BT_MBOX_PRINT(0, CHL_SEQ_N, false);
559 BT_MBOX_PRINT(0, INBAND_S, false);
560 BT_MBOX_PRINT(0, LE_MIN_RSSI, false);
561 BT_MBOX_PRINT(0, LE_SCAN, false);
562 BT_MBOX_PRINT(0, LE_ADV, false);
563 BT_MBOX_PRINT(0, LE_MAX_TX_POWER, false);
564 BT_MBOX_PRINT(0, OPEN_CON_1, true);
565
566 pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw1:\n");
567
568 BT_MBOX_PRINT(1, BR_MAX_TX_POWER, false);
569 BT_MBOX_PRINT(1, IP_SR, false);
570 BT_MBOX_PRINT(1, LE_MSTR, false);
571 BT_MBOX_PRINT(1, AGGR_TRFC_LD, false);
572 BT_MBOX_PRINT(1, MSG_TYPE, false);
573 BT_MBOX_PRINT(1, SSN, true);
574
575 pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw2:\n");
576
577 BT_MBOX_PRINT(2, SNIFF_ACT, false);
578 BT_MBOX_PRINT(2, PAG, false);
579 BT_MBOX_PRINT(2, INQUIRY, false);
580 BT_MBOX_PRINT(2, CONN, false);
581 BT_MBOX_PRINT(2, SNIFF_INTERVAL, false);
582 BT_MBOX_PRINT(2, DISC, false);
583 BT_MBOX_PRINT(2, SCO_TX_ACT, false);
584 BT_MBOX_PRINT(2, SCO_RX_ACT, false);
585 BT_MBOX_PRINT(2, ESCO_RE_TX, false);
586 BT_MBOX_PRINT(2, SCO_DURATION, true);
587
588 pos += scnprintf(buf+pos, bufsz-pos, "MBOX dw3:\n");
589
590 BT_MBOX_PRINT(3, SCO_STATE, false);
591 BT_MBOX_PRINT(3, SNIFF_STATE, false);
592 BT_MBOX_PRINT(3, A2DP_STATE, false);
593 BT_MBOX_PRINT(3, ACL_STATE, false);
594 BT_MBOX_PRINT(3, MSTR_STATE, false);
595 BT_MBOX_PRINT(3, OBX_STATE, false);
596 BT_MBOX_PRINT(3, OPEN_CON_2, false);
597 BT_MBOX_PRINT(3, TRAFFIC_LOAD, false);
598 BT_MBOX_PRINT(3, CHL_SEQN_LSB, false);
599 BT_MBOX_PRINT(3, INBAND_P, false);
600 BT_MBOX_PRINT(3, MSG_TYPE_2, false);
601 BT_MBOX_PRINT(3, SSN_2, false);
602 BT_MBOX_PRINT(3, UPDATE_REQUEST, true);
603
604 pos += scnprintf(buf+pos, bufsz-pos, "bt_status = %d\n",
605 notif->bt_status);
606 pos += scnprintf(buf+pos, bufsz-pos, "bt_open_conn = %d\n",
607 notif->bt_open_conn);
608 pos += scnprintf(buf+pos, bufsz-pos, "bt_traffic_load = %d\n",
609 notif->bt_traffic_load);
610 pos += scnprintf(buf+pos, bufsz-pos, "bt_agg_traffic_load = %d\n",
611 notif->bt_agg_traffic_load);
612 pos += scnprintf(buf+pos, bufsz-pos, "bt_ci_compliance = %d\n",
613 notif->bt_ci_compliance);
614
615 mutex_unlock(&mvm->mutex);
616
617 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
618 kfree(buf);
619
620 return ret;
621 }
622 #undef BT_MBOX_PRINT
623
624 static ssize_t iwl_dbgfs_fw_restart_write(struct file *file,
625 const char __user *user_buf,
626 size_t count, loff_t *ppos)
627 {
628 struct iwl_mvm *mvm = file->private_data;
629 bool restart_fw = iwlwifi_mod_params.restart_fw;
630 int ret;
631
632 iwlwifi_mod_params.restart_fw = true;
633
634 mutex_lock(&mvm->mutex);
635
636 /* take the return value to make compiler happy - it will fail anyway */
637 ret = iwl_mvm_send_cmd_pdu(mvm, REPLY_ERROR, CMD_SYNC, 0, NULL);
638
639 mutex_unlock(&mvm->mutex);
640
641 iwlwifi_mod_params.restart_fw = restart_fw;
642
643 return count;
644 }
645
646 static void iwl_dbgfs_update_bf(struct ieee80211_vif *vif,
647 enum iwl_dbgfs_bf_mask param, int value)
648 {
649 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
650 struct iwl_dbgfs_bf *dbgfs_bf = &mvmvif->dbgfs_bf;
651
652 dbgfs_bf->mask |= param;
653
654 switch (param) {
655 case MVM_DEBUGFS_BF_ENERGY_DELTA:
656 dbgfs_bf->bf_energy_delta = value;
657 break;
658 case MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA:
659 dbgfs_bf->bf_roaming_energy_delta = value;
660 break;
661 case MVM_DEBUGFS_BF_ROAMING_STATE:
662 dbgfs_bf->bf_roaming_state = value;
663 break;
664 case MVM_DEBUGFS_BF_TEMPERATURE_DELTA:
665 dbgfs_bf->bf_temperature_delta = value;
666 break;
667 case MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER:
668 dbgfs_bf->bf_enable_beacon_filter = value;
669 break;
670 case MVM_DEBUGFS_BF_DEBUG_FLAG:
671 dbgfs_bf->bf_debug_flag = value;
672 break;
673 case MVM_DEBUGFS_BF_ESCAPE_TIMER:
674 dbgfs_bf->bf_escape_timer = value;
675 break;
676 case MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT:
677 dbgfs_bf->ba_enable_beacon_abort = value;
678 break;
679 case MVM_DEBUGFS_BA_ESCAPE_TIMER:
680 dbgfs_bf->ba_escape_timer = value;
681 break;
682 }
683 }
684
685 static ssize_t iwl_dbgfs_bf_params_write(struct file *file,
686 const char __user *user_buf,
687 size_t count, loff_t *ppos)
688 {
689 struct ieee80211_vif *vif = file->private_data;
690 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
691 struct iwl_mvm *mvm = mvmvif->dbgfs_data;
692 enum iwl_dbgfs_bf_mask param;
693 char buf[256];
694 int buf_size;
695 int value;
696 int ret = 0;
697
698 memset(buf, 0, sizeof(buf));
699 buf_size = min(count, sizeof(buf) - 1);
700 if (copy_from_user(buf, user_buf, buf_size))
701 return -EFAULT;
702
703 if (!strncmp("bf_energy_delta=", buf, 16)) {
704 if (sscanf(buf+16, "%d", &value) != 1)
705 return -EINVAL;
706 if (value < IWL_BF_ENERGY_DELTA_MIN ||
707 value > IWL_BF_ENERGY_DELTA_MAX)
708 return -EINVAL;
709 param = MVM_DEBUGFS_BF_ENERGY_DELTA;
710 } else if (!strncmp("bf_roaming_energy_delta=", buf, 24)) {
711 if (sscanf(buf+24, "%d", &value) != 1)
712 return -EINVAL;
713 if (value < IWL_BF_ROAMING_ENERGY_DELTA_MIN ||
714 value > IWL_BF_ROAMING_ENERGY_DELTA_MAX)
715 return -EINVAL;
716 param = MVM_DEBUGFS_BF_ROAMING_ENERGY_DELTA;
717 } else if (!strncmp("bf_roaming_state=", buf, 17)) {
718 if (sscanf(buf+17, "%d", &value) != 1)
719 return -EINVAL;
720 if (value < IWL_BF_ROAMING_STATE_MIN ||
721 value > IWL_BF_ROAMING_STATE_MAX)
722 return -EINVAL;
723 param = MVM_DEBUGFS_BF_ROAMING_STATE;
724 } else if (!strncmp("bf_temperature_delta=", buf, 21)) {
725 if (sscanf(buf+21, "%d", &value) != 1)
726 return -EINVAL;
727 if (value < IWL_BF_TEMPERATURE_DELTA_MIN ||
728 value > IWL_BF_TEMPERATURE_DELTA_MAX)
729 return -EINVAL;
730 param = MVM_DEBUGFS_BF_TEMPERATURE_DELTA;
731 } else if (!strncmp("bf_enable_beacon_filter=", buf, 24)) {
732 if (sscanf(buf+24, "%d", &value) != 1)
733 return -EINVAL;
734 if (value < 0 || value > 1)
735 return -EINVAL;
736 param = MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER;
737 } else if (!strncmp("bf_debug_flag=", buf, 14)) {
738 if (sscanf(buf+14, "%d", &value) != 1)
739 return -EINVAL;
740 if (value < 0 || value > 1)
741 return -EINVAL;
742 param = MVM_DEBUGFS_BF_DEBUG_FLAG;
743 } else if (!strncmp("bf_escape_timer=", buf, 16)) {
744 if (sscanf(buf+16, "%d", &value) != 1)
745 return -EINVAL;
746 if (value < IWL_BF_ESCAPE_TIMER_MIN ||
747 value > IWL_BF_ESCAPE_TIMER_MAX)
748 return -EINVAL;
749 param = MVM_DEBUGFS_BF_ESCAPE_TIMER;
750 } else if (!strncmp("ba_escape_timer=", buf, 16)) {
751 if (sscanf(buf+16, "%d", &value) != 1)
752 return -EINVAL;
753 if (value < IWL_BA_ESCAPE_TIMER_MIN ||
754 value > IWL_BA_ESCAPE_TIMER_MAX)
755 return -EINVAL;
756 param = MVM_DEBUGFS_BA_ESCAPE_TIMER;
757 } else if (!strncmp("ba_enable_beacon_abort=", buf, 23)) {
758 if (sscanf(buf+23, "%d", &value) != 1)
759 return -EINVAL;
760 if (value < 0 || value > 1)
761 return -EINVAL;
762 param = MVM_DEBUGFS_BA_ENABLE_BEACON_ABORT;
763 } else {
764 return -EINVAL;
765 }
766
767 mutex_lock(&mvm->mutex);
768 iwl_dbgfs_update_bf(vif, param, value);
769 if (param == MVM_DEBUGFS_BF_ENABLE_BEACON_FILTER && !value) {
770 ret = iwl_mvm_disable_beacon_filter(mvm, vif);
771 } else {
772 if (mvmvif->bf_enabled)
773 ret = iwl_mvm_enable_beacon_filter(mvm, vif);
774 else
775 ret = iwl_mvm_disable_beacon_filter(mvm, vif);
776 }
777 mutex_unlock(&mvm->mutex);
778
779 return ret ?: count;
780 }
781
782 static ssize_t iwl_dbgfs_bf_params_read(struct file *file,
783 char __user *user_buf,
784 size_t count, loff_t *ppos)
785 {
786 struct ieee80211_vif *vif = file->private_data;
787 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
788 char buf[256];
789 int pos = 0;
790 const size_t bufsz = sizeof(buf);
791 struct iwl_beacon_filter_cmd cmd = {
792 .bf_energy_delta = IWL_BF_ENERGY_DELTA_DEFAULT,
793 .bf_roaming_energy_delta = IWL_BF_ROAMING_ENERGY_DELTA_DEFAULT,
794 .bf_roaming_state = IWL_BF_ROAMING_STATE_DEFAULT,
795 .bf_temperature_delta = IWL_BF_TEMPERATURE_DELTA_DEFAULT,
796 .bf_enable_beacon_filter = IWL_BF_ENABLE_BEACON_FILTER_DEFAULT,
797 .bf_debug_flag = IWL_BF_DEBUG_FLAG_DEFAULT,
798 .bf_escape_timer = cpu_to_le32(IWL_BF_ESCAPE_TIMER_DEFAULT),
799 .ba_escape_timer = cpu_to_le32(IWL_BA_ESCAPE_TIMER_DEFAULT),
800 .ba_enable_beacon_abort = IWL_BA_ENABLE_BEACON_ABORT_DEFAULT,
801 };
802
803 iwl_mvm_beacon_filter_debugfs_parameters(vif, &cmd);
804 if (mvmvif->bf_enabled)
805 cmd.bf_enable_beacon_filter = 1;
806 else
807 cmd.bf_enable_beacon_filter = 0;
808
809 pos += scnprintf(buf+pos, bufsz-pos, "bf_energy_delta = %d\n",
810 cmd.bf_energy_delta);
811 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_energy_delta = %d\n",
812 cmd.bf_roaming_energy_delta);
813 pos += scnprintf(buf+pos, bufsz-pos, "bf_roaming_state = %d\n",
814 cmd.bf_roaming_state);
815 pos += scnprintf(buf+pos, bufsz-pos, "bf_temperature_delta = %d\n",
816 cmd.bf_temperature_delta);
817 pos += scnprintf(buf+pos, bufsz-pos, "bf_enable_beacon_filter = %d\n",
818 cmd.bf_enable_beacon_filter);
819 pos += scnprintf(buf+pos, bufsz-pos, "bf_debug_flag = %d\n",
820 cmd.bf_debug_flag);
821 pos += scnprintf(buf+pos, bufsz-pos, "bf_escape_timer = %d\n",
822 cmd.bf_escape_timer);
823 pos += scnprintf(buf+pos, bufsz-pos, "ba_escape_timer = %d\n",
824 cmd.ba_escape_timer);
825 pos += scnprintf(buf+pos, bufsz-pos, "ba_enable_beacon_abort = %d\n",
826 cmd.ba_enable_beacon_abort);
827
828 return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
829 }
830
831 #ifdef CONFIG_PM_SLEEP
832 static ssize_t iwl_dbgfs_d3_sram_write(struct file *file,
833 const char __user *user_buf,
834 size_t count, loff_t *ppos)
835 {
836 struct iwl_mvm *mvm = file->private_data;
837 char buf[8] = {};
838 int store;
839
840 if (copy_from_user(buf, user_buf, sizeof(buf)))
841 return -EFAULT;
842
843 if (sscanf(buf, "%d", &store) != 1)
844 return -EINVAL;
845
846 mvm->store_d3_resume_sram = store;
847
848 return count;
849 }
850
851 static ssize_t iwl_dbgfs_d3_sram_read(struct file *file, char __user *user_buf,
852 size_t count, loff_t *ppos)
853 {
854 struct iwl_mvm *mvm = file->private_data;
855 const struct fw_img *img;
856 int ofs, len, pos = 0;
857 size_t bufsz, ret;
858 char *buf;
859 u8 *ptr = mvm->d3_resume_sram;
860
861 img = &mvm->fw->img[IWL_UCODE_WOWLAN];
862 len = img->sec[IWL_UCODE_SECTION_DATA].len;
863
864 bufsz = len * 4 + 256;
865 buf = kzalloc(bufsz, GFP_KERNEL);
866 if (!buf)
867 return -ENOMEM;
868
869 pos += scnprintf(buf, bufsz, "D3 SRAM capture: %sabled\n",
870 mvm->store_d3_resume_sram ? "en" : "dis");
871
872 if (ptr) {
873 for (ofs = 0; ofs < len; ofs += 16) {
874 pos += scnprintf(buf + pos, bufsz - pos,
875 "0x%.4x ", ofs);
876 hex_dump_to_buffer(ptr + ofs, 16, 16, 1, buf + pos,
877 bufsz - pos, false);
878 pos += strlen(buf + pos);
879 if (bufsz - pos > 0)
880 buf[pos++] = '\n';
881 }
882 } else {
883 pos += scnprintf(buf + pos, bufsz - pos,
884 "(no data captured)\n");
885 }
886
887 ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
888
889 kfree(buf);
890
891 return ret;
892 }
893 #endif
894
895 #define MVM_DEBUGFS_READ_FILE_OPS(name) \
896 static const struct file_operations iwl_dbgfs_##name##_ops = { \
897 .read = iwl_dbgfs_##name##_read, \
898 .open = simple_open, \
899 .llseek = generic_file_llseek, \
900 }
901
902 #define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name) \
903 static const struct file_operations iwl_dbgfs_##name##_ops = { \
904 .write = iwl_dbgfs_##name##_write, \
905 .read = iwl_dbgfs_##name##_read, \
906 .open = simple_open, \
907 .llseek = generic_file_llseek, \
908 };
909
910 #define MVM_DEBUGFS_WRITE_FILE_OPS(name) \
911 static const struct file_operations iwl_dbgfs_##name##_ops = { \
912 .write = iwl_dbgfs_##name##_write, \
913 .open = simple_open, \
914 .llseek = generic_file_llseek, \
915 };
916
917 #define MVM_DEBUGFS_ADD_FILE(name, parent, mode) do { \
918 if (!debugfs_create_file(#name, mode, parent, mvm, \
919 &iwl_dbgfs_##name##_ops)) \
920 goto err; \
921 } while (0)
922
923 #define MVM_DEBUGFS_ADD_FILE_VIF(name, parent, mode) do { \
924 if (!debugfs_create_file(#name, mode, parent, vif, \
925 &iwl_dbgfs_##name##_ops)) \
926 goto err; \
927 } while (0)
928
929 /* Device wide debugfs entries */
930 MVM_DEBUGFS_WRITE_FILE_OPS(tx_flush);
931 MVM_DEBUGFS_WRITE_FILE_OPS(sta_drain);
932 MVM_DEBUGFS_READ_WRITE_FILE_OPS(sram);
933 MVM_DEBUGFS_READ_FILE_OPS(stations);
934 MVM_DEBUGFS_READ_FILE_OPS(bt_notif);
935 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_allow);
936 MVM_DEBUGFS_WRITE_FILE_OPS(power_down_d3_allow);
937 MVM_DEBUGFS_WRITE_FILE_OPS(fw_restart);
938 #ifdef CONFIG_PM_SLEEP
939 MVM_DEBUGFS_READ_WRITE_FILE_OPS(d3_sram);
940 #endif
941
942 /* Interface specific debugfs entries */
943 MVM_DEBUGFS_READ_FILE_OPS(mac_params);
944 MVM_DEBUGFS_READ_WRITE_FILE_OPS(pm_params);
945 MVM_DEBUGFS_READ_WRITE_FILE_OPS(bf_params);
946
947 int iwl_mvm_dbgfs_register(struct iwl_mvm *mvm, struct dentry *dbgfs_dir)
948 {
949 char buf[100];
950
951 mvm->debugfs_dir = dbgfs_dir;
952
953 MVM_DEBUGFS_ADD_FILE(tx_flush, mvm->debugfs_dir, S_IWUSR);
954 MVM_DEBUGFS_ADD_FILE(sta_drain, mvm->debugfs_dir, S_IWUSR);
955 MVM_DEBUGFS_ADD_FILE(sram, mvm->debugfs_dir, S_IWUSR | S_IRUSR);
956 MVM_DEBUGFS_ADD_FILE(stations, dbgfs_dir, S_IRUSR);
957 MVM_DEBUGFS_ADD_FILE(bt_notif, dbgfs_dir, S_IRUSR);
958 MVM_DEBUGFS_ADD_FILE(power_down_allow, mvm->debugfs_dir, S_IWUSR);
959 MVM_DEBUGFS_ADD_FILE(power_down_d3_allow, mvm->debugfs_dir, S_IWUSR);
960 MVM_DEBUGFS_ADD_FILE(fw_restart, mvm->debugfs_dir, S_IWUSR);
961 #ifdef CONFIG_PM_SLEEP
962 MVM_DEBUGFS_ADD_FILE(d3_sram, mvm->debugfs_dir, S_IRUSR | S_IWUSR);
963 MVM_DEBUGFS_ADD_FILE(d3_test, mvm->debugfs_dir, S_IRUSR);
964 if (!debugfs_create_bool("d3_wake_sysassert", S_IRUSR | S_IWUSR,
965 mvm->debugfs_dir, &mvm->d3_wake_sysassert))
966 goto err;
967 #endif
968
969 /*
970 * Create a symlink with mac80211. It will be removed when mac80211
971 * exists (before the opmode exists which removes the target.)
972 */
973 snprintf(buf, 100, "../../%s/%s",
974 dbgfs_dir->d_parent->d_parent->d_name.name,
975 dbgfs_dir->d_parent->d_name.name);
976 if (!debugfs_create_symlink("iwlwifi", mvm->hw->wiphy->debugfsdir, buf))
977 goto err;
978
979 return 0;
980 err:
981 IWL_ERR(mvm, "Can't create the mvm debugfs directory\n");
982 return -ENOMEM;
983 }
984
985 void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
986 {
987 struct dentry *dbgfs_dir = vif->debugfs_dir;
988 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
989 char buf[100];
990
991 if (!dbgfs_dir)
992 return;
993
994 mvmvif->dbgfs_dir = debugfs_create_dir("iwlmvm", dbgfs_dir);
995 mvmvif->dbgfs_data = mvm;
996
997 if (!mvmvif->dbgfs_dir) {
998 IWL_ERR(mvm, "Failed to create debugfs directory under %s\n",
999 dbgfs_dir->d_name.name);
1000 return;
1001 }
1002
1003 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM &&
1004 vif->type == NL80211_IFTYPE_STATION && !vif->p2p)
1005 MVM_DEBUGFS_ADD_FILE_VIF(pm_params, mvmvif->dbgfs_dir, S_IWUSR |
1006 S_IRUSR);
1007
1008 MVM_DEBUGFS_ADD_FILE_VIF(mac_params, mvmvif->dbgfs_dir,
1009 S_IRUSR);
1010
1011 if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&
1012 mvmvif == mvm->bf_allowed_vif)
1013 MVM_DEBUGFS_ADD_FILE_VIF(bf_params, mvmvif->dbgfs_dir,
1014 S_IRUSR | S_IWUSR);
1015
1016 /*
1017 * Create symlink for convenience pointing to interface specific
1018 * debugfs entries for the driver. For example, under
1019 * /sys/kernel/debug/iwlwifi/0000\:02\:00.0/iwlmvm/
1020 * find
1021 * netdev:wlan0 -> ../../../ieee80211/phy0/netdev:wlan0/iwlmvm/
1022 */
1023 snprintf(buf, 100, "../../../%s/%s/%s/%s",
1024 dbgfs_dir->d_parent->d_parent->d_name.name,
1025 dbgfs_dir->d_parent->d_name.name,
1026 dbgfs_dir->d_name.name,
1027 mvmvif->dbgfs_dir->d_name.name);
1028
1029 mvmvif->dbgfs_slink = debugfs_create_symlink(dbgfs_dir->d_name.name,
1030 mvm->debugfs_dir, buf);
1031 if (!mvmvif->dbgfs_slink)
1032 IWL_ERR(mvm, "Can't create debugfs symbolic link under %s\n",
1033 dbgfs_dir->d_name.name);
1034 return;
1035 err:
1036 IWL_ERR(mvm, "Can't create debugfs entity\n");
1037 }
1038
1039 void iwl_mvm_vif_dbgfs_clean(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1040 {
1041 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1042
1043 debugfs_remove(mvmvif->dbgfs_slink);
1044 mvmvif->dbgfs_slink = NULL;
1045
1046 debugfs_remove_recursive(mvmvif->dbgfs_dir);
1047 mvmvif->dbgfs_dir = NULL;
1048 }
CRIS linux kernel tree