1 /*
2  * This file is part of wl1271
3  *
4  * Copyright (C) 2009 Nokia Corporation
5  *
6  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23 
24 #include "debugfs.h"
25 
26 #include <linux/skbuff.h>
27 #include <linux/slab.h>
28 #include <linux/module.h>
29 
30 #include "wlcore.h"
31 #include "debug.h"
32 #include "acx.h"
33 #include "ps.h"
34 #include "io.h"
35 #include "tx.h"
36 #include "hw_ops.h"
37 
38 /* ms */
39 #define WL1271_DEBUGFS_STATS_LIFETIME 1000
40 
41 #define WLCORE_MAX_BLOCK_SIZE ((size_t)(4*PAGE_SIZE))
42 
43 /* debugfs macros idea from mac80211 */
44 int wl1271_format_buffer(char __user *userbuf, size_t count,
45 			 loff_t *ppos, char *fmt, ...)
46 {
47 	va_list args;
48 	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];
49 	int res;
50 
51 	va_start(args, fmt);
52 	res = vscnprintf(buf, sizeof(buf), fmt, args);
53 	va_end(args);
54 
55 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
56 }
57 EXPORT_SYMBOL_GPL(wl1271_format_buffer);
58 
59 void wl1271_debugfs_update_stats(struct wl1271 *wl)
60 {
61 	int ret;
62 
63 	mutex_lock(&wl->mutex);
64 
65 	if (unlikely(wl->state != WLCORE_STATE_ON))
66 		goto out;
67 
68 	ret = wl1271_ps_elp_wakeup(wl);
69 	if (ret < 0)
70 		goto out;
71 
72 	if (!wl->plt &&
73 	    time_after(jiffies, wl->stats.fw_stats_update +
74 		       msecs_to_jiffies(WL1271_DEBUGFS_STATS_LIFETIME))) {
75 		wl1271_acx_statistics(wl, wl->stats.fw_stats);
76 		wl->stats.fw_stats_update = jiffies;
77 	}
78 
79 	wl1271_ps_elp_sleep(wl);
80 
81 out:
82 	mutex_unlock(&wl->mutex);
83 }
84 EXPORT_SYMBOL_GPL(wl1271_debugfs_update_stats);
85 
86 DEBUGFS_READONLY_FILE(retry_count, "%u", wl->stats.retry_count);
87 DEBUGFS_READONLY_FILE(excessive_retries, "%u",
88 		      wl->stats.excessive_retries);
89 
90 static ssize_t tx_queue_len_read(struct file *file, char __user *userbuf,
91 				 size_t count, loff_t *ppos)
92 {
93 	struct wl1271 *wl = file->private_data;
94 	u32 queue_len;
95 	char buf[20];
96 	int res;
97 
98 	queue_len = wl1271_tx_total_queue_count(wl);
99 
100 	res = scnprintf(buf, sizeof(buf), "%u\n", queue_len);
101 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);
102 }
103 
104 static const struct file_operations tx_queue_len_ops = {
105 	.read = tx_queue_len_read,
106 	.open = simple_open,
107 	.llseek = default_llseek,
108 };
109 
110 static void chip_op_handler(struct wl1271 *wl, unsigned long value,
111 			    void *arg)
112 {
113 	int ret;
114 	int (*chip_op) (struct wl1271 *wl);
115 
116 	if (!arg) {
117 		wl1271_warning("debugfs chip_op_handler with no callback");
118 		return;
119 	}
120 
121 	ret = wl1271_ps_elp_wakeup(wl);
122 	if (ret < 0)
123 		return;
124 
125 	chip_op = arg;
126 	chip_op(wl);
127 
128 	wl1271_ps_elp_sleep(wl);
129 }
130 
131 
132 static inline void no_write_handler(struct wl1271 *wl,
133 				    unsigned long value,
134 				    unsigned long param)
135 {
136 }
137 
138 #define WL12XX_CONF_DEBUGFS(param, conf_sub_struct,			\
139 			    min_val, max_val, write_handler_locked,	\
140 			    write_handler_arg)				\
141 	static ssize_t param##_read(struct file *file,			\
142 				      char __user *user_buf,		\
143 				      size_t count, loff_t *ppos)	\
144 	{								\
145 	struct wl1271 *wl = file->private_data;				\
146 	return wl1271_format_buffer(user_buf, count,			\
147 				    ppos, "%d\n",			\
148 				    wl->conf.conf_sub_struct.param);	\
149 	}								\
150 									\
151 	static ssize_t param##_write(struct file *file,			\
152 				     const char __user *user_buf,	\
153 				     size_t count, loff_t *ppos)	\
154 	{								\
155 	struct wl1271 *wl = file->private_data;				\
156 	unsigned long value;						\
157 	int ret;							\
158 									\
159 	ret = kstrtoul_from_user(user_buf, count, 10, &value);		\
160 	if (ret < 0) {							\
161 		wl1271_warning("illegal value for " #param);		\
162 		return -EINVAL;						\
163 	}								\
164 									\
165 	if (value < min_val || value > max_val) {			\
166 		wl1271_warning(#param " is not in valid range");	\
167 		return -ERANGE;						\
168 	}								\
169 									\
170 	mutex_lock(&wl->mutex);						\
171 	wl->conf.conf_sub_struct.param = value;				\
172 									\
173 	write_handler_locked(wl, value, write_handler_arg);		\
174 									\
175 	mutex_unlock(&wl->mutex);					\
176 	return count;							\
177 	}								\
178 									\
179 	static const struct file_operations param##_ops = {		\
180 		.read = param##_read,					\
181 		.write = param##_write,					\
182 		.open = simple_open,					\
183 		.llseek = default_llseek,				\
184 	};
185 
186 WL12XX_CONF_DEBUGFS(irq_pkt_threshold, rx, 0, 65535,
187 		    chip_op_handler, wl1271_acx_init_rx_interrupt)
188 WL12XX_CONF_DEBUGFS(irq_blk_threshold, rx, 0, 65535,
189 		    chip_op_handler, wl1271_acx_init_rx_interrupt)
190 WL12XX_CONF_DEBUGFS(irq_timeout, rx, 0, 100,
191 		    chip_op_handler, wl1271_acx_init_rx_interrupt)
192 
193 static ssize_t gpio_power_read(struct file *file, char __user *user_buf,
194 			  size_t count, loff_t *ppos)
195 {
196 	struct wl1271 *wl = file->private_data;
197 	bool state = test_bit(WL1271_FLAG_GPIO_POWER, &wl->flags);
198 
199 	int res;
200 	char buf[10];
201 
202 	res = scnprintf(buf, sizeof(buf), "%d\n", state);
203 
204 	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
205 }
206 
207 static ssize_t gpio_power_write(struct file *file,
208 			   const char __user *user_buf,
209 			   size_t count, loff_t *ppos)
210 {
211 	struct wl1271 *wl = file->private_data;
212 	unsigned long value;
213 	int ret;
214 
215 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
216 	if (ret < 0) {
217 		wl1271_warning("illegal value in gpio_power");
218 		return -EINVAL;
219 	}
220 
221 	mutex_lock(&wl->mutex);
222 
223 	if (value)
224 		wl1271_power_on(wl);
225 	else
226 		wl1271_power_off(wl);
227 
228 	mutex_unlock(&wl->mutex);
229 	return count;
230 }
231 
232 static const struct file_operations gpio_power_ops = {
233 	.read = gpio_power_read,
234 	.write = gpio_power_write,
235 	.open = simple_open,
236 	.llseek = default_llseek,
237 };
238 
239 static ssize_t start_recovery_write(struct file *file,
240 				    const char __user *user_buf,
241 				    size_t count, loff_t *ppos)
242 {
243 	struct wl1271 *wl = file->private_data;
244 
245 	mutex_lock(&wl->mutex);
246 	wl12xx_queue_recovery_work(wl);
247 	mutex_unlock(&wl->mutex);
248 
249 	return count;
250 }
251 
252 static const struct file_operations start_recovery_ops = {
253 	.write = start_recovery_write,
254 	.open = simple_open,
255 	.llseek = default_llseek,
256 };
257 
258 static ssize_t dynamic_ps_timeout_read(struct file *file, char __user *user_buf,
259 			  size_t count, loff_t *ppos)
260 {
261 	struct wl1271 *wl = file->private_data;
262 
263 	return wl1271_format_buffer(user_buf, count,
264 				    ppos, "%d\n",
265 				    wl->conf.conn.dynamic_ps_timeout);
266 }
267 
268 static ssize_t dynamic_ps_timeout_write(struct file *file,
269 				    const char __user *user_buf,
270 				    size_t count, loff_t *ppos)
271 {
272 	struct wl1271 *wl = file->private_data;
273 	struct wl12xx_vif *wlvif;
274 	unsigned long value;
275 	int ret;
276 
277 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
278 	if (ret < 0) {
279 		wl1271_warning("illegal value in dynamic_ps");
280 		return -EINVAL;
281 	}
282 
283 	if (value < 1 || value > 65535) {
284 		wl1271_warning("dyanmic_ps_timeout is not in valid range");
285 		return -ERANGE;
286 	}
287 
288 	mutex_lock(&wl->mutex);
289 
290 	wl->conf.conn.dynamic_ps_timeout = value;
291 
292 	if (unlikely(wl->state != WLCORE_STATE_ON))
293 		goto out;
294 
295 	ret = wl1271_ps_elp_wakeup(wl);
296 	if (ret < 0)
297 		goto out;
298 
299 	/* In case we're already in PSM, trigger it again to set new timeout
300 	 * immediately without waiting for re-association
301 	 */
302 
303 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
304 		if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
305 			wl1271_ps_set_mode(wl, wlvif, STATION_AUTO_PS_MODE);
306 	}
307 
308 	wl1271_ps_elp_sleep(wl);
309 
310 out:
311 	mutex_unlock(&wl->mutex);
312 	return count;
313 }
314 
315 static const struct file_operations dynamic_ps_timeout_ops = {
316 	.read = dynamic_ps_timeout_read,
317 	.write = dynamic_ps_timeout_write,
318 	.open = simple_open,
319 	.llseek = default_llseek,
320 };
321 
322 static ssize_t forced_ps_read(struct file *file, char __user *user_buf,
323 			  size_t count, loff_t *ppos)
324 {
325 	struct wl1271 *wl = file->private_data;
326 
327 	return wl1271_format_buffer(user_buf, count,
328 				    ppos, "%d\n",
329 				    wl->conf.conn.forced_ps);
330 }
331 
332 static ssize_t forced_ps_write(struct file *file,
333 				    const char __user *user_buf,
334 				    size_t count, loff_t *ppos)
335 {
336 	struct wl1271 *wl = file->private_data;
337 	struct wl12xx_vif *wlvif;
338 	unsigned long value;
339 	int ret, ps_mode;
340 
341 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
342 	if (ret < 0) {
343 		wl1271_warning("illegal value in forced_ps");
344 		return -EINVAL;
345 	}
346 
347 	if (value != 1 && value != 0) {
348 		wl1271_warning("forced_ps should be either 0 or 1");
349 		return -ERANGE;
350 	}
351 
352 	mutex_lock(&wl->mutex);
353 
354 	if (wl->conf.conn.forced_ps == value)
355 		goto out;
356 
357 	wl->conf.conn.forced_ps = value;
358 
359 	if (unlikely(wl->state != WLCORE_STATE_ON))
360 		goto out;
361 
362 	ret = wl1271_ps_elp_wakeup(wl);
363 	if (ret < 0)
364 		goto out;
365 
366 	/* In case we're already in PSM, trigger it again to switch mode
367 	 * immediately without waiting for re-association
368 	 */
369 
370 	ps_mode = value ? STATION_POWER_SAVE_MODE : STATION_AUTO_PS_MODE;
371 
372 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
373 		if (test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags))
374 			wl1271_ps_set_mode(wl, wlvif, ps_mode);
375 	}
376 
377 	wl1271_ps_elp_sleep(wl);
378 
379 out:
380 	mutex_unlock(&wl->mutex);
381 	return count;
382 }
383 
384 static const struct file_operations forced_ps_ops = {
385 	.read = forced_ps_read,
386 	.write = forced_ps_write,
387 	.open = simple_open,
388 	.llseek = default_llseek,
389 };
390 
391 static ssize_t split_scan_timeout_read(struct file *file, char __user *user_buf,
392 			  size_t count, loff_t *ppos)
393 {
394 	struct wl1271 *wl = file->private_data;
395 
396 	return wl1271_format_buffer(user_buf, count,
397 				    ppos, "%d\n",
398 				    wl->conf.scan.split_scan_timeout / 1000);
399 }
400 
401 static ssize_t split_scan_timeout_write(struct file *file,
402 				    const char __user *user_buf,
403 				    size_t count, loff_t *ppos)
404 {
405 	struct wl1271 *wl = file->private_data;
406 	unsigned long value;
407 	int ret;
408 
409 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
410 	if (ret < 0) {
411 		wl1271_warning("illegal value in split_scan_timeout");
412 		return -EINVAL;
413 	}
414 
415 	if (value == 0)
416 		wl1271_info("split scan will be disabled");
417 
418 	mutex_lock(&wl->mutex);
419 
420 	wl->conf.scan.split_scan_timeout = value * 1000;
421 
422 	mutex_unlock(&wl->mutex);
423 	return count;
424 }
425 
426 static const struct file_operations split_scan_timeout_ops = {
427 	.read = split_scan_timeout_read,
428 	.write = split_scan_timeout_write,
429 	.open = simple_open,
430 	.llseek = default_llseek,
431 };
432 
433 static ssize_t driver_state_read(struct file *file, char __user *user_buf,
434 				 size_t count, loff_t *ppos)
435 {
436 	struct wl1271 *wl = file->private_data;
437 	int res = 0;
438 	ssize_t ret;
439 	char *buf;
440 	struct wl12xx_vif *wlvif;
441 
442 #define DRIVER_STATE_BUF_LEN 1024
443 
444 	buf = kmalloc(DRIVER_STATE_BUF_LEN, GFP_KERNEL);
445 	if (!buf)
446 		return -ENOMEM;
447 
448 	mutex_lock(&wl->mutex);
449 
450 #define DRIVER_STATE_PRINT(x, fmt)   \
451 	(res += scnprintf(buf + res, DRIVER_STATE_BUF_LEN - res,\
452 			  #x " = " fmt "\n", wl->x))
453 
454 #define DRIVER_STATE_PRINT_GENERIC(x, fmt, args...)   \
455 	(res += scnprintf(buf + res, DRIVER_STATE_BUF_LEN - res,\
456 			  #x " = " fmt "\n", args))
457 
458 #define DRIVER_STATE_PRINT_LONG(x) DRIVER_STATE_PRINT(x, "%ld")
459 #define DRIVER_STATE_PRINT_INT(x)  DRIVER_STATE_PRINT(x, "%d")
460 #define DRIVER_STATE_PRINT_STR(x)  DRIVER_STATE_PRINT(x, "%s")
461 #define DRIVER_STATE_PRINT_LHEX(x) DRIVER_STATE_PRINT(x, "0x%lx")
462 #define DRIVER_STATE_PRINT_HEX(x)  DRIVER_STATE_PRINT(x, "0x%x")
463 
464 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
465 		if (!test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags))
466 			continue;
467 
468 		DRIVER_STATE_PRINT_GENERIC(channel, "%d (%s)", wlvif->channel,
469 					   wlvif->p2p ? "P2P-CL" : "STA");
470 	}
471 
472 	wl12xx_for_each_wlvif_ap(wl, wlvif)
473 		DRIVER_STATE_PRINT_GENERIC(channel, "%d (%s)", wlvif->channel,
474 					   wlvif->p2p ? "P2P-GO" : "AP");
475 
476 	DRIVER_STATE_PRINT_INT(tx_blocks_available);
477 	DRIVER_STATE_PRINT_INT(tx_allocated_blocks);
478 	DRIVER_STATE_PRINT_INT(tx_allocated_pkts[0]);
479 	DRIVER_STATE_PRINT_INT(tx_allocated_pkts[1]);
480 	DRIVER_STATE_PRINT_INT(tx_allocated_pkts[2]);
481 	DRIVER_STATE_PRINT_INT(tx_allocated_pkts[3]);
482 	DRIVER_STATE_PRINT_INT(tx_frames_cnt);
483 	DRIVER_STATE_PRINT_LHEX(tx_frames_map[0]);
484 	DRIVER_STATE_PRINT_INT(tx_queue_count[0]);
485 	DRIVER_STATE_PRINT_INT(tx_queue_count[1]);
486 	DRIVER_STATE_PRINT_INT(tx_queue_count[2]);
487 	DRIVER_STATE_PRINT_INT(tx_queue_count[3]);
488 	DRIVER_STATE_PRINT_INT(tx_packets_count);
489 	DRIVER_STATE_PRINT_INT(tx_results_count);
490 	DRIVER_STATE_PRINT_LHEX(flags);
491 	DRIVER_STATE_PRINT_INT(tx_blocks_freed);
492 	DRIVER_STATE_PRINT_INT(rx_counter);
493 	DRIVER_STATE_PRINT_INT(state);
494 	DRIVER_STATE_PRINT_INT(band);
495 	DRIVER_STATE_PRINT_INT(power_level);
496 	DRIVER_STATE_PRINT_INT(sg_enabled);
497 	DRIVER_STATE_PRINT_INT(enable_11a);
498 	DRIVER_STATE_PRINT_INT(noise);
499 	DRIVER_STATE_PRINT_LHEX(ap_fw_ps_map);
500 	DRIVER_STATE_PRINT_LHEX(ap_ps_map);
501 	DRIVER_STATE_PRINT_HEX(quirks);
502 	DRIVER_STATE_PRINT_HEX(irq);
503 	/* TODO: ref_clock and tcxo_clock were moved to wl12xx priv */
504 	DRIVER_STATE_PRINT_HEX(hw_pg_ver);
505 	DRIVER_STATE_PRINT_HEX(platform_quirks);
506 	DRIVER_STATE_PRINT_HEX(chip.id);
507 	DRIVER_STATE_PRINT_STR(chip.fw_ver_str);
508 	DRIVER_STATE_PRINT_STR(chip.phy_fw_ver_str);
509 	DRIVER_STATE_PRINT_INT(recovery_count);
510 
511 #undef DRIVER_STATE_PRINT_INT
512 #undef DRIVER_STATE_PRINT_LONG
513 #undef DRIVER_STATE_PRINT_HEX
514 #undef DRIVER_STATE_PRINT_LHEX
515 #undef DRIVER_STATE_PRINT_STR
516 #undef DRIVER_STATE_PRINT
517 #undef DRIVER_STATE_BUF_LEN
518 
519 	mutex_unlock(&wl->mutex);
520 
521 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, res);
522 	kfree(buf);
523 	return ret;
524 }
525 
526 static const struct file_operations driver_state_ops = {
527 	.read = driver_state_read,
528 	.open = simple_open,
529 	.llseek = default_llseek,
530 };
531 
532 static ssize_t vifs_state_read(struct file *file, char __user *user_buf,
533 				 size_t count, loff_t *ppos)
534 {
535 	struct wl1271 *wl = file->private_data;
536 	struct wl12xx_vif *wlvif;
537 	int ret, res = 0;
538 	const int buf_size = 4096;
539 	char *buf;
540 	char tmp_buf[64];
541 
542 	buf = kzalloc(buf_size, GFP_KERNEL);
543 	if (!buf)
544 		return -ENOMEM;
545 
546 	mutex_lock(&wl->mutex);
547 
548 #define VIF_STATE_PRINT(x, fmt)				\
549 	(res += scnprintf(buf + res, buf_size - res,	\
550 			  #x " = " fmt "\n", wlvif->x))
551 
552 #define VIF_STATE_PRINT_LONG(x)  VIF_STATE_PRINT(x, "%ld")
553 #define VIF_STATE_PRINT_INT(x)   VIF_STATE_PRINT(x, "%d")
554 #define VIF_STATE_PRINT_STR(x)   VIF_STATE_PRINT(x, "%s")
555 #define VIF_STATE_PRINT_LHEX(x)  VIF_STATE_PRINT(x, "0x%lx")
556 #define VIF_STATE_PRINT_LLHEX(x) VIF_STATE_PRINT(x, "0x%llx")
557 #define VIF_STATE_PRINT_HEX(x)   VIF_STATE_PRINT(x, "0x%x")
558 
559 #define VIF_STATE_PRINT_NSTR(x, len)				\
560 	do {							\
561 		memset(tmp_buf, 0, sizeof(tmp_buf));		\
562 		memcpy(tmp_buf, wlvif->x,			\
563 		       min_t(u8, len, sizeof(tmp_buf) - 1));	\
564 		res += scnprintf(buf + res, buf_size - res,	\
565 				 #x " = %s\n", tmp_buf);	\
566 	} while (0)
567 
568 	wl12xx_for_each_wlvif(wl, wlvif) {
569 		VIF_STATE_PRINT_INT(role_id);
570 		VIF_STATE_PRINT_INT(bss_type);
571 		VIF_STATE_PRINT_LHEX(flags);
572 		VIF_STATE_PRINT_INT(p2p);
573 		VIF_STATE_PRINT_INT(dev_role_id);
574 		VIF_STATE_PRINT_INT(dev_hlid);
575 
576 		if (wlvif->bss_type == BSS_TYPE_STA_BSS ||
577 		    wlvif->bss_type == BSS_TYPE_IBSS) {
578 			VIF_STATE_PRINT_INT(sta.hlid);
579 			VIF_STATE_PRINT_INT(sta.basic_rate_idx);
580 			VIF_STATE_PRINT_INT(sta.ap_rate_idx);
581 			VIF_STATE_PRINT_INT(sta.p2p_rate_idx);
582 			VIF_STATE_PRINT_INT(sta.qos);
583 		} else {
584 			VIF_STATE_PRINT_INT(ap.global_hlid);
585 			VIF_STATE_PRINT_INT(ap.bcast_hlid);
586 			VIF_STATE_PRINT_LHEX(ap.sta_hlid_map[0]);
587 			VIF_STATE_PRINT_INT(ap.mgmt_rate_idx);
588 			VIF_STATE_PRINT_INT(ap.bcast_rate_idx);
589 			VIF_STATE_PRINT_INT(ap.ucast_rate_idx[0]);
590 			VIF_STATE_PRINT_INT(ap.ucast_rate_idx[1]);
591 			VIF_STATE_PRINT_INT(ap.ucast_rate_idx[2]);
592 			VIF_STATE_PRINT_INT(ap.ucast_rate_idx[3]);
593 		}
594 		VIF_STATE_PRINT_INT(last_tx_hlid);
595 		VIF_STATE_PRINT_INT(tx_queue_count[0]);
596 		VIF_STATE_PRINT_INT(tx_queue_count[1]);
597 		VIF_STATE_PRINT_INT(tx_queue_count[2]);
598 		VIF_STATE_PRINT_INT(tx_queue_count[3]);
599 		VIF_STATE_PRINT_LHEX(links_map[0]);
600 		VIF_STATE_PRINT_NSTR(ssid, wlvif->ssid_len);
601 		VIF_STATE_PRINT_INT(band);
602 		VIF_STATE_PRINT_INT(channel);
603 		VIF_STATE_PRINT_HEX(bitrate_masks[0]);
604 		VIF_STATE_PRINT_HEX(bitrate_masks[1]);
605 		VIF_STATE_PRINT_HEX(basic_rate_set);
606 		VIF_STATE_PRINT_HEX(basic_rate);
607 		VIF_STATE_PRINT_HEX(rate_set);
608 		VIF_STATE_PRINT_INT(beacon_int);
609 		VIF_STATE_PRINT_INT(default_key);
610 		VIF_STATE_PRINT_INT(aid);
611 		VIF_STATE_PRINT_INT(psm_entry_retry);
612 		VIF_STATE_PRINT_INT(power_level);
613 		VIF_STATE_PRINT_INT(rssi_thold);
614 		VIF_STATE_PRINT_INT(last_rssi_event);
615 		VIF_STATE_PRINT_INT(ba_support);
616 		VIF_STATE_PRINT_INT(ba_allowed);
617 		VIF_STATE_PRINT_LLHEX(total_freed_pkts);
618 	}
619 
620 #undef VIF_STATE_PRINT_INT
621 #undef VIF_STATE_PRINT_LONG
622 #undef VIF_STATE_PRINT_HEX
623 #undef VIF_STATE_PRINT_LHEX
624 #undef VIF_STATE_PRINT_LLHEX
625 #undef VIF_STATE_PRINT_STR
626 #undef VIF_STATE_PRINT_NSTR
627 #undef VIF_STATE_PRINT
628 
629 	mutex_unlock(&wl->mutex);
630 
631 	ret = simple_read_from_buffer(user_buf, count, ppos, buf, res);
632 	kfree(buf);
633 	return ret;
634 }
635 
636 static const struct file_operations vifs_state_ops = {
637 	.read = vifs_state_read,
638 	.open = simple_open,
639 	.llseek = default_llseek,
640 };
641 
642 static ssize_t dtim_interval_read(struct file *file, char __user *user_buf,
643 				  size_t count, loff_t *ppos)
644 {
645 	struct wl1271 *wl = file->private_data;
646 	u8 value;
647 
648 	if (wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_DTIM ||
649 	    wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_N_DTIM)
650 		value = wl->conf.conn.listen_interval;
651 	else
652 		value = 0;
653 
654 	return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
655 }
656 
657 static ssize_t dtim_interval_write(struct file *file,
658 				   const char __user *user_buf,
659 				   size_t count, loff_t *ppos)
660 {
661 	struct wl1271 *wl = file->private_data;
662 	unsigned long value;
663 	int ret;
664 
665 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
666 	if (ret < 0) {
667 		wl1271_warning("illegal value for dtim_interval");
668 		return -EINVAL;
669 	}
670 
671 	if (value < 1 || value > 10) {
672 		wl1271_warning("dtim value is not in valid range");
673 		return -ERANGE;
674 	}
675 
676 	mutex_lock(&wl->mutex);
677 
678 	wl->conf.conn.listen_interval = value;
679 	/* for some reason there are different event types for 1 and >1 */
680 	if (value == 1)
681 		wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_DTIM;
682 	else
683 		wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_N_DTIM;
684 
685 	/*
686 	 * we don't reconfigure ACX_WAKE_UP_CONDITIONS now, so it will only
687 	 * take effect on the next time we enter psm.
688 	 */
689 	mutex_unlock(&wl->mutex);
690 	return count;
691 }
692 
693 static const struct file_operations dtim_interval_ops = {
694 	.read = dtim_interval_read,
695 	.write = dtim_interval_write,
696 	.open = simple_open,
697 	.llseek = default_llseek,
698 };
699 
700 
701 
702 static ssize_t suspend_dtim_interval_read(struct file *file,
703 					  char __user *user_buf,
704 					  size_t count, loff_t *ppos)
705 {
706 	struct wl1271 *wl = file->private_data;
707 	u8 value;
708 
709 	if (wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_DTIM ||
710 	    wl->conf.conn.suspend_wake_up_event == CONF_WAKE_UP_EVENT_N_DTIM)
711 		value = wl->conf.conn.suspend_listen_interval;
712 	else
713 		value = 0;
714 
715 	return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
716 }
717 
718 static ssize_t suspend_dtim_interval_write(struct file *file,
719 					   const char __user *user_buf,
720 					   size_t count, loff_t *ppos)
721 {
722 	struct wl1271 *wl = file->private_data;
723 	unsigned long value;
724 	int ret;
725 
726 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
727 	if (ret < 0) {
728 		wl1271_warning("illegal value for suspend_dtim_interval");
729 		return -EINVAL;
730 	}
731 
732 	if (value < 1 || value > 10) {
733 		wl1271_warning("suspend_dtim value is not in valid range");
734 		return -ERANGE;
735 	}
736 
737 	mutex_lock(&wl->mutex);
738 
739 	wl->conf.conn.suspend_listen_interval = value;
740 	/* for some reason there are different event types for 1 and >1 */
741 	if (value == 1)
742 		wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_DTIM;
743 	else
744 		wl->conf.conn.suspend_wake_up_event = CONF_WAKE_UP_EVENT_N_DTIM;
745 
746 	mutex_unlock(&wl->mutex);
747 	return count;
748 }
749 
750 
751 static const struct file_operations suspend_dtim_interval_ops = {
752 	.read = suspend_dtim_interval_read,
753 	.write = suspend_dtim_interval_write,
754 	.open = simple_open,
755 	.llseek = default_llseek,
756 };
757 
758 static ssize_t beacon_interval_read(struct file *file, char __user *user_buf,
759 				    size_t count, loff_t *ppos)
760 {
761 	struct wl1271 *wl = file->private_data;
762 	u8 value;
763 
764 	if (wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_BEACON ||
765 	    wl->conf.conn.wake_up_event == CONF_WAKE_UP_EVENT_N_BEACONS)
766 		value = wl->conf.conn.listen_interval;
767 	else
768 		value = 0;
769 
770 	return wl1271_format_buffer(user_buf, count, ppos, "%d\n", value);
771 }
772 
773 static ssize_t beacon_interval_write(struct file *file,
774 				     const char __user *user_buf,
775 				     size_t count, loff_t *ppos)
776 {
777 	struct wl1271 *wl = file->private_data;
778 	unsigned long value;
779 	int ret;
780 
781 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
782 	if (ret < 0) {
783 		wl1271_warning("illegal value for beacon_interval");
784 		return -EINVAL;
785 	}
786 
787 	if (value < 1 || value > 255) {
788 		wl1271_warning("beacon interval value is not in valid range");
789 		return -ERANGE;
790 	}
791 
792 	mutex_lock(&wl->mutex);
793 
794 	wl->conf.conn.listen_interval = value;
795 	/* for some reason there are different event types for 1 and >1 */
796 	if (value == 1)
797 		wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_BEACON;
798 	else
799 		wl->conf.conn.wake_up_event = CONF_WAKE_UP_EVENT_N_BEACONS;
800 
801 	/*
802 	 * we don't reconfigure ACX_WAKE_UP_CONDITIONS now, so it will only
803 	 * take effect on the next time we enter psm.
804 	 */
805 	mutex_unlock(&wl->mutex);
806 	return count;
807 }
808 
809 static const struct file_operations beacon_interval_ops = {
810 	.read = beacon_interval_read,
811 	.write = beacon_interval_write,
812 	.open = simple_open,
813 	.llseek = default_llseek,
814 };
815 
816 static ssize_t rx_streaming_interval_write(struct file *file,
817 			   const char __user *user_buf,
818 			   size_t count, loff_t *ppos)
819 {
820 	struct wl1271 *wl = file->private_data;
821 	struct wl12xx_vif *wlvif;
822 	unsigned long value;
823 	int ret;
824 
825 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
826 	if (ret < 0) {
827 		wl1271_warning("illegal value in rx_streaming_interval!");
828 		return -EINVAL;
829 	}
830 
831 	/* valid values: 0, 10-100 */
832 	if (value && (value < 10 || value > 100)) {
833 		wl1271_warning("value is not in range!");
834 		return -ERANGE;
835 	}
836 
837 	mutex_lock(&wl->mutex);
838 
839 	wl->conf.rx_streaming.interval = value;
840 
841 	ret = wl1271_ps_elp_wakeup(wl);
842 	if (ret < 0)
843 		goto out;
844 
845 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
846 		wl1271_recalc_rx_streaming(wl, wlvif);
847 	}
848 
849 	wl1271_ps_elp_sleep(wl);
850 out:
851 	mutex_unlock(&wl->mutex);
852 	return count;
853 }
854 
855 static ssize_t rx_streaming_interval_read(struct file *file,
856 			    char __user *userbuf,
857 			    size_t count, loff_t *ppos)
858 {
859 	struct wl1271 *wl = file->private_data;
860 	return wl1271_format_buffer(userbuf, count, ppos,
861 				    "%d\n", wl->conf.rx_streaming.interval);
862 }
863 
864 static const struct file_operations rx_streaming_interval_ops = {
865 	.read = rx_streaming_interval_read,
866 	.write = rx_streaming_interval_write,
867 	.open = simple_open,
868 	.llseek = default_llseek,
869 };
870 
871 static ssize_t rx_streaming_always_write(struct file *file,
872 			   const char __user *user_buf,
873 			   size_t count, loff_t *ppos)
874 {
875 	struct wl1271 *wl = file->private_data;
876 	struct wl12xx_vif *wlvif;
877 	unsigned long value;
878 	int ret;
879 
880 	ret = kstrtoul_from_user(user_buf, count, 10, &value);
881 	if (ret < 0) {
882 		wl1271_warning("illegal value in rx_streaming_write!");
883 		return -EINVAL;
884 	}
885 
886 	/* valid values: 0, 10-100 */
887 	if (!(value == 0 || value == 1)) {
888 		wl1271_warning("value is not in valid!");
889 		return -EINVAL;
890 	}
891 
892 	mutex_lock(&wl->mutex);
893 
894 	wl->conf.rx_streaming.always = value;
895 
896 	ret = wl1271_ps_elp_wakeup(wl);
897 	if (ret < 0)
898 		goto out;
899 
900 	wl12xx_for_each_wlvif_sta(wl, wlvif) {
901 		wl1271_recalc_rx_streaming(wl, wlvif);
902 	}
903 
904 	wl1271_ps_elp_sleep(wl);
905 out:
906 	mutex_unlock(&wl->mutex);
907 	return count;
908 }
909 
910 static ssize_t rx_streaming_always_read(struct file *file,
911 			    char __user *userbuf,
912 			    size_t count, loff_t *ppos)
913 {
914 	struct wl1271 *wl = file->private_data;
915 	return wl1271_format_buffer(userbuf, count, ppos,
916 				    "%d\n", wl->conf.rx_streaming.always);
917 }
918 
919 static const struct file_operations rx_streaming_always_ops = {
920 	.read = rx_streaming_always_read,
921 	.write = rx_streaming_always_write,
922 	.open = simple_open,
923 	.llseek = default_llseek,
924 };
925 
926 static ssize_t beacon_filtering_write(struct file *file,
927 				      const char __user *user_buf,
928 				      size_t count, loff_t *ppos)
929 {
930 	struct wl1271 *wl = file->private_data;
931 	struct wl12xx_vif *wlvif;
932 	char buf[10];
933 	size_t len;
934 	unsigned long value;
935 	int ret;
936 
937 	len = min(count, sizeof(buf) - 1);
938 	if (copy_from_user(buf, user_buf, len))
939 		return -EFAULT;
940 	buf[len] = '\0';
941 
942 	ret = kstrtoul(buf, 0, &value);
943 	if (ret < 0) {
944 		wl1271_warning("illegal value for beacon_filtering!");
945 		return -EINVAL;
946 	}
947 
948 	mutex_lock(&wl->mutex);
949 
950 	ret = wl1271_ps_elp_wakeup(wl);
951 	if (ret < 0)
952 		goto out;
953 
954 	wl12xx_for_each_wlvif(wl, wlvif) {
955 		ret = wl1271_acx_beacon_filter_opt(wl, wlvif, !!value);
956 	}
957 
958 	wl1271_ps_elp_sleep(wl);
959 out:
960 	mutex_unlock(&wl->mutex);
961 	return count;
962 }
963 
964 static const struct file_operations beacon_filtering_ops = {
965 	.write = beacon_filtering_write,
966 	.open = simple_open,
967 	.llseek = default_llseek,
968 };
969 
970 static ssize_t fw_stats_raw_read(struct file *file,
971 				 char __user *userbuf,
972 				 size_t count, loff_t *ppos)
973 {
974 	struct wl1271 *wl = file->private_data;
975 
976 	wl1271_debugfs_update_stats(wl);
977 
978 	return simple_read_from_buffer(userbuf, count, ppos,
979 				       wl->stats.fw_stats,
980 				       wl->stats.fw_stats_len);
981 }
982 
983 static const struct file_operations fw_stats_raw_ops = {
984 	.read = fw_stats_raw_read,
985 	.open = simple_open,
986 	.llseek = default_llseek,
987 };
988 
989 static ssize_t sleep_auth_read(struct file *file, char __user *user_buf,
990 			       size_t count, loff_t *ppos)
991 {
992 	struct wl1271 *wl = file->private_data;
993 
994 	return wl1271_format_buffer(user_buf, count,
995 				    ppos, "%d\n",
996 				    wl->sleep_auth);
997 }
998 
999 static ssize_t sleep_auth_write(struct file *file,
1000 				const char __user *user_buf,
1001 				size_t count, loff_t *ppos)
1002 {
1003 	struct wl1271 *wl = file->private_data;
1004 	unsigned long value;
1005 	int ret;
1006 
1007 	ret = kstrtoul_from_user(user_buf, count, 0, &value);
1008 	if (ret < 0) {
1009 		wl1271_warning("illegal value in sleep_auth");
1010 		return -EINVAL;
1011 	}
1012 
1013 	if (value > WL1271_PSM_MAX) {
1014 		wl1271_warning("sleep_auth must be between 0 and %d",
1015 			       WL1271_PSM_MAX);
1016 		return -ERANGE;
1017 	}
1018 
1019 	mutex_lock(&wl->mutex);
1020 
1021 	wl->conf.conn.sta_sleep_auth = value;
1022 
1023 	if (unlikely(wl->state != WLCORE_STATE_ON)) {
1024 		/* this will show up on "read" in case we are off */
1025 		wl->sleep_auth = value;
1026 		goto out;
1027 	}
1028 
1029 	ret = wl1271_ps_elp_wakeup(wl);
1030 	if (ret < 0)
1031 		goto out;
1032 
1033 	ret = wl1271_acx_sleep_auth(wl, value);
1034 	if (ret < 0)
1035 		goto out_sleep;
1036 
1037 out_sleep:
1038 	wl1271_ps_elp_sleep(wl);
1039 out:
1040 	mutex_unlock(&wl->mutex);
1041 	return count;
1042 }
1043 
1044 static const struct file_operations sleep_auth_ops = {
1045 	.read = sleep_auth_read,
1046 	.write = sleep_auth_write,
1047 	.open = simple_open,
1048 	.llseek = default_llseek,
1049 };
1050 
1051 static ssize_t dev_mem_read(struct file *file,
1052 	     char __user *user_buf, size_t count,
1053 	     loff_t *ppos)
1054 {
1055 	struct wl1271 *wl = file->private_data;
1056 	struct wlcore_partition_set part, old_part;
1057 	size_t bytes = count;
1058 	int ret;
1059 	char *buf;
1060 
1061 	/* only requests of dword-aligned size and offset are supported */
1062 	if (bytes % 4)
1063 		return -EINVAL;
1064 
1065 	if (*ppos % 4)
1066 		return -EINVAL;
1067 
1068 	/* function should return in reasonable time */
1069 	bytes = min(bytes, WLCORE_MAX_BLOCK_SIZE);
1070 
1071 	if (bytes == 0)
1072 		return -EINVAL;
1073 
1074 	memset(&part, 0, sizeof(part));
1075 	part.mem.start = *ppos;
1076 	part.mem.size = bytes;
1077 
1078 	buf = kmalloc(bytes, GFP_KERNEL);
1079 	if (!buf)
1080 		return -ENOMEM;
1081 
1082 	mutex_lock(&wl->mutex);
1083 
1084 	if (unlikely(wl->state == WLCORE_STATE_OFF)) {
1085 		ret = -EFAULT;
1086 		goto skip_read;
1087 	}
1088 
1089 	/*
1090 	 * Don't fail if elp_wakeup returns an error, so the device's memory
1091 	 * could be read even if the FW crashed
1092 	 */
1093 	wl1271_ps_elp_wakeup(wl);
1094 
1095 	/* store current partition and switch partition */
1096 	memcpy(&old_part, &wl->curr_part, sizeof(old_part));
1097 	ret = wlcore_set_partition(wl, &part);
1098 	if (ret < 0)
1099 		goto part_err;
1100 
1101 	ret = wlcore_raw_read(wl, 0, buf, bytes, false);
1102 	if (ret < 0)
1103 		goto read_err;
1104 
1105 read_err:
1106 	/* recover partition */
1107 	ret = wlcore_set_partition(wl, &old_part);
1108 	if (ret < 0)
1109 		goto part_err;
1110 
1111 part_err:
1112 	wl1271_ps_elp_sleep(wl);
1113 
1114 skip_read:
1115 	mutex_unlock(&wl->mutex);
1116 
1117 	if (ret == 0) {
1118 		ret = copy_to_user(user_buf, buf, bytes);
1119 		if (ret < bytes) {
1120 			bytes -= ret;
1121 			*ppos += bytes;
1122 			ret = 0;
1123 		} else {
1124 			ret = -EFAULT;
1125 		}
1126 	}
1127 
1128 	kfree(buf);
1129 
1130 	return ((ret == 0) ? bytes : ret);
1131 }
1132 
1133 static ssize_t dev_mem_write(struct file *file, const char __user *user_buf,
1134 		size_t count, loff_t *ppos)
1135 {
1136 	struct wl1271 *wl = file->private_data;
1137 	struct wlcore_partition_set part, old_part;
1138 	size_t bytes = count;
1139 	int ret;
1140 	char *buf;
1141 
1142 	/* only requests of dword-aligned size and offset are supported */
1143 	if (bytes % 4)
1144 		return -EINVAL;
1145 
1146 	if (*ppos % 4)
1147 		return -EINVAL;
1148 
1149 	/* function should return in reasonable time */
1150 	bytes = min(bytes, WLCORE_MAX_BLOCK_SIZE);
1151 
1152 	if (bytes == 0)
1153 		return -EINVAL;
1154 
1155 	memset(&part, 0, sizeof(part));
1156 	part.mem.start = *ppos;
1157 	part.mem.size = bytes;
1158 
1159 	buf = kmalloc(bytes, GFP_KERNEL);
1160 	if (!buf)
1161 		return -ENOMEM;
1162 
1163 	ret = copy_from_user(buf, user_buf, bytes);
1164 	if (ret) {
1165 		ret = -EFAULT;
1166 		goto err_out;
1167 	}
1168 
1169 	mutex_lock(&wl->mutex);
1170 
1171 	if (unlikely(wl->state == WLCORE_STATE_OFF)) {
1172 		ret = -EFAULT;
1173 		goto skip_write;
1174 	}
1175 
1176 	/*
1177 	 * Don't fail if elp_wakeup returns an error, so the device's memory
1178 	 * could be read even if the FW crashed
1179 	 */
1180 	wl1271_ps_elp_wakeup(wl);
1181 
1182 	/* store current partition and switch partition */
1183 	memcpy(&old_part, &wl->curr_part, sizeof(old_part));
1184 	ret = wlcore_set_partition(wl, &part);
1185 	if (ret < 0)
1186 		goto part_err;
1187 
1188 	ret = wlcore_raw_write(wl, 0, buf, bytes, false);
1189 	if (ret < 0)
1190 		goto write_err;
1191 
1192 write_err:
1193 	/* recover partition */
1194 	ret = wlcore_set_partition(wl, &old_part);
1195 	if (ret < 0)
1196 		goto part_err;
1197 
1198 part_err:
1199 	wl1271_ps_elp_sleep(wl);
1200 
1201 skip_write:
1202 	mutex_unlock(&wl->mutex);
1203 
1204 	if (ret == 0)
1205 		*ppos += bytes;
1206 
1207 err_out:
1208 	kfree(buf);
1209 
1210 	return ((ret == 0) ? bytes : ret);
1211 }
1212 
1213 static loff_t dev_mem_seek(struct file *file, loff_t offset, int orig)
1214 {
1215 	loff_t ret;
1216 
1217 	/* only requests of dword-aligned size and offset are supported */
1218 	if (offset % 4)
1219 		return -EINVAL;
1220 
1221 	switch (orig) {
1222 	case SEEK_SET:
1223 		file->f_pos = offset;
1224 		ret = file->f_pos;
1225 		break;
1226 	case SEEK_CUR:
1227 		file->f_pos += offset;
1228 		ret = file->f_pos;
1229 		break;
1230 	default:
1231 		ret = -EINVAL;
1232 	}
1233 
1234 	return ret;
1235 }
1236 
1237 static const struct file_operations dev_mem_ops = {
1238 	.open = simple_open,
1239 	.read = dev_mem_read,
1240 	.write = dev_mem_write,
1241 	.llseek = dev_mem_seek,
1242 };
1243 
1244 static int wl1271_debugfs_add_files(struct wl1271 *wl,
1245 				    struct dentry *rootdir)
1246 {
1247 	int ret = 0;
1248 	struct dentry *entry, *streaming;
1249 
1250 	DEBUGFS_ADD(tx_queue_len, rootdir);
1251 	DEBUGFS_ADD(retry_count, rootdir);
1252 	DEBUGFS_ADD(excessive_retries, rootdir);
1253 
1254 	DEBUGFS_ADD(gpio_power, rootdir);
1255 	DEBUGFS_ADD(start_recovery, rootdir);
1256 	DEBUGFS_ADD(driver_state, rootdir);
1257 	DEBUGFS_ADD(vifs_state, rootdir);
1258 	DEBUGFS_ADD(dtim_interval, rootdir);
1259 	DEBUGFS_ADD(suspend_dtim_interval, rootdir);
1260 	DEBUGFS_ADD(beacon_interval, rootdir);
1261 	DEBUGFS_ADD(beacon_filtering, rootdir);
1262 	DEBUGFS_ADD(dynamic_ps_timeout, rootdir);
1263 	DEBUGFS_ADD(forced_ps, rootdir);
1264 	DEBUGFS_ADD(split_scan_timeout, rootdir);
1265 	DEBUGFS_ADD(irq_pkt_threshold, rootdir);
1266 	DEBUGFS_ADD(irq_blk_threshold, rootdir);
1267 	DEBUGFS_ADD(irq_timeout, rootdir);
1268 	DEBUGFS_ADD(fw_stats_raw, rootdir);
1269 	DEBUGFS_ADD(sleep_auth, rootdir);
1270 
1271 	streaming = debugfs_create_dir("rx_streaming", rootdir);
1272 	if (!streaming || IS_ERR(streaming))
1273 		goto err;
1274 
1275 	DEBUGFS_ADD_PREFIX(rx_streaming, interval, streaming);
1276 	DEBUGFS_ADD_PREFIX(rx_streaming, always, streaming);
1277 
1278 	DEBUGFS_ADD_PREFIX(dev, mem, rootdir);
1279 
1280 	return 0;
1281 
1282 err:
1283 	if (IS_ERR(entry))
1284 		ret = PTR_ERR(entry);
1285 	else
1286 		ret = -ENOMEM;
1287 
1288 	return ret;
1289 }
1290 
1291 void wl1271_debugfs_reset(struct wl1271 *wl)
1292 {
1293 	if (!wl->stats.fw_stats)
1294 		return;
1295 
1296 	memset(wl->stats.fw_stats, 0, wl->stats.fw_stats_len);
1297 	wl->stats.retry_count = 0;
1298 	wl->stats.excessive_retries = 0;
1299 }
1300 
1301 int wl1271_debugfs_init(struct wl1271 *wl)
1302 {
1303 	int ret;
1304 	struct dentry *rootdir;
1305 
1306 	rootdir = debugfs_create_dir(KBUILD_MODNAME,
1307 				     wl->hw->wiphy->debugfsdir);
1308 
1309 	if (IS_ERR(rootdir)) {
1310 		ret = PTR_ERR(rootdir);
1311 		goto out;
1312 	}
1313 
1314 	wl->stats.fw_stats = kzalloc(wl->stats.fw_stats_len, GFP_KERNEL);
1315 	if (!wl->stats.fw_stats) {
1316 		ret = -ENOMEM;
1317 		goto out_remove;
1318 	}
1319 
1320 	wl->stats.fw_stats_update = jiffies;
1321 
1322 	ret = wl1271_debugfs_add_files(wl, rootdir);
1323 	if (ret < 0)
1324 		goto out_exit;
1325 
1326 	ret = wlcore_debugfs_init(wl, rootdir);
1327 	if (ret < 0)
1328 		goto out_exit;
1329 
1330 	goto out;
1331 
1332 out_exit:
1333 	wl1271_debugfs_exit(wl);
1334 
1335 out_remove:
1336 	debugfs_remove_recursive(rootdir);
1337 
1338 out:
1339 	return ret;
1340 }
1341 
1342 void wl1271_debugfs_exit(struct wl1271 *wl)
1343 {
1344 	kfree(wl->stats.fw_stats);
1345 	wl->stats.fw_stats = NULL;
1346 }
1347