1 /*
2  * Atheros CARL9170 driver
3  *
4  * debug(fs) probing
5  *
6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
7  * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU 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; see the file COPYING.  If not, see
21  * http://www.gnu.org/licenses/.
22  *
23  * This file incorporates work covered by the following copyright and
24  * permission notice:
25  *    Copyright (c) 2008-2009 Atheros Communications, Inc.
26  *
27  *    Permission to use, copy, modify, and/or distribute this software for any
28  *    purpose with or without fee is hereby granted, provided that the above
29  *    copyright notice and this permission notice appear in all copies.
30  *
31  *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
32  *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
33  *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
34  *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
35  *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
36  *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
37  *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
38  */
39 
40 #include <linux/slab.h>
41 #include <linux/module.h>
42 #include <linux/seq_file.h>
43 #include <linux/vmalloc.h>
44 #include "carl9170.h"
45 #include "cmd.h"
46 
47 #define ADD(buf, off, max, fmt, args...)				\
48 	off += snprintf(&buf[off], max - off, fmt, ##args);
49 
50 
51 struct carl9170_debugfs_fops {
52 	unsigned int read_bufsize;
53 	umode_t attr;
54 	char *(*read)(struct ar9170 *ar, char *buf, size_t bufsize,
55 		      ssize_t *len);
56 	ssize_t (*write)(struct ar9170 *aru, const char *buf, size_t size);
57 	const struct file_operations fops;
58 
59 	enum carl9170_device_state req_dev_state;
60 };
61 
62 static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf,
63 				     size_t count, loff_t *ppos)
64 {
65 	struct carl9170_debugfs_fops *dfops;
66 	struct ar9170 *ar;
67 	char *buf = NULL, *res_buf = NULL;
68 	ssize_t ret = 0;
69 	int err = 0;
70 
71 	if (!count)
72 		return 0;
73 
74 	ar = file->private_data;
75 
76 	if (!ar)
77 		return -ENODEV;
78 	dfops = container_of(debugfs_real_fops(file),
79 			     struct carl9170_debugfs_fops, fops);
80 
81 	if (!dfops->read)
82 		return -ENOSYS;
83 
84 	if (dfops->read_bufsize) {
85 		buf = vmalloc(dfops->read_bufsize);
86 		if (!buf)
87 			return -ENOMEM;
88 	}
89 
90 	mutex_lock(&ar->mutex);
91 	if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
92 		err = -ENODEV;
93 		res_buf = buf;
94 		goto out_free;
95 	}
96 
97 	res_buf = dfops->read(ar, buf, dfops->read_bufsize, &ret);
98 
99 	if (ret > 0)
100 		err = simple_read_from_buffer(userbuf, count, ppos,
101 					      res_buf, ret);
102 	else
103 		err = ret;
104 
105 	WARN_ON_ONCE(dfops->read_bufsize && (res_buf != buf));
106 
107 out_free:
108 	vfree(res_buf);
109 	mutex_unlock(&ar->mutex);
110 	return err;
111 }
112 
113 static ssize_t carl9170_debugfs_write(struct file *file,
114 	const char __user *userbuf, size_t count, loff_t *ppos)
115 {
116 	struct carl9170_debugfs_fops *dfops;
117 	struct ar9170 *ar;
118 	char *buf = NULL;
119 	int err = 0;
120 
121 	if (!count)
122 		return 0;
123 
124 	if (count > PAGE_SIZE)
125 		return -E2BIG;
126 
127 	ar = file->private_data;
128 
129 	if (!ar)
130 		return -ENODEV;
131 	dfops = container_of(debugfs_real_fops(file),
132 			     struct carl9170_debugfs_fops, fops);
133 
134 	if (!dfops->write)
135 		return -ENOSYS;
136 
137 	buf = vmalloc(count);
138 	if (!buf)
139 		return -ENOMEM;
140 
141 	if (copy_from_user(buf, userbuf, count)) {
142 		err = -EFAULT;
143 		goto out_free;
144 	}
145 
146 	if (mutex_trylock(&ar->mutex) == 0) {
147 		err = -EAGAIN;
148 		goto out_free;
149 	}
150 
151 	if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
152 		err = -ENODEV;
153 		goto out_unlock;
154 	}
155 
156 	err = dfops->write(ar, buf, count);
157 	if (err)
158 		goto out_unlock;
159 
160 out_unlock:
161 	mutex_unlock(&ar->mutex);
162 
163 out_free:
164 	vfree(buf);
165 	return err;
166 }
167 
168 #define __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,	\
169 			       _attr, _dstate)				\
170 static const struct carl9170_debugfs_fops carl_debugfs_##name ##_ops = {\
171 	.read_bufsize = _read_bufsize,					\
172 	.read = _read,							\
173 	.write = _write,						\
174 	.attr = _attr,							\
175 	.req_dev_state = _dstate,					\
176 	.fops = {							\
177 		.open	= simple_open,					\
178 		.read	= carl9170_debugfs_read,			\
179 		.write	= carl9170_debugfs_write,			\
180 		.owner	= THIS_MODULE					\
181 	},								\
182 }
183 
184 #define DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize, _attr)	\
185 	__DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,	\
186 			       _attr, CARL9170_STARTED)			\
187 
188 #define DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)			\
189 	DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
190 			     NULL, _read_bufsize, 0400)
191 
192 #define DEBUGFS_DECLARE_WO_FILE(name)					\
193 	DEBUGFS_DECLARE_FILE(name, NULL, carl9170_debugfs_##name ##_write,\
194 			     0, 0200)
195 
196 #define DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize)			\
197 	DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
198 			     carl9170_debugfs_##name ##_write,		\
199 			     _read_bufsize, 0600)
200 
201 #define __DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize, _dstate)		\
202 	__DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
203 			     carl9170_debugfs_##name ##_write,		\
204 			     _read_bufsize, 0600, _dstate)
205 
206 #define DEBUGFS_READONLY_FILE(name, _read_bufsize, fmt, value...)	\
207 static char *carl9170_debugfs_ ##name ## _read(struct ar9170 *ar,	\
208 					     char *buf, size_t buf_size,\
209 					     ssize_t *len)		\
210 {									\
211 	ADD(buf, *len, buf_size, fmt "\n", ##value);			\
212 	return buf;							\
213 }									\
214 DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)
215 
216 static char *carl9170_debugfs_mem_usage_read(struct ar9170 *ar, char *buf,
217 					     size_t bufsize, ssize_t *len)
218 {
219 	spin_lock_bh(&ar->mem_lock);
220 
221 	ADD(buf, *len, bufsize, "jar: [%*pb]\n",
222 	    ar->fw.mem_blocks, ar->mem_bitmap);
223 
224 	ADD(buf, *len, bufsize, "cookies: used:%3d / total:%3d, allocs:%d\n",
225 	    bitmap_weight(ar->mem_bitmap, ar->fw.mem_blocks),
226 	    ar->fw.mem_blocks, atomic_read(&ar->mem_allocs));
227 
228 	ADD(buf, *len, bufsize, "memory: free:%3d (%3d KiB) / total:%3d KiB)\n",
229 	    atomic_read(&ar->mem_free_blocks),
230 	    (atomic_read(&ar->mem_free_blocks) * ar->fw.mem_block_size) / 1024,
231 	    (ar->fw.mem_blocks * ar->fw.mem_block_size) / 1024);
232 
233 	spin_unlock_bh(&ar->mem_lock);
234 
235 	return buf;
236 }
237 DEBUGFS_DECLARE_RO_FILE(mem_usage, 512);
238 
239 static char *carl9170_debugfs_qos_stat_read(struct ar9170 *ar, char *buf,
240 					    size_t bufsize, ssize_t *len)
241 {
242 	ADD(buf, *len, bufsize, "%s QoS AC\n", modparam_noht ? "Hardware" :
243 	    "Software");
244 
245 	ADD(buf, *len, bufsize, "[     VO            VI       "
246 				 "     BE            BK      ]\n");
247 
248 	spin_lock_bh(&ar->tx_stats_lock);
249 	ADD(buf, *len, bufsize, "[length/limit  length/limit  "
250 				 "length/limit  length/limit ]\n"
251 				"[   %3d/%3d       %3d/%3d    "
252 				 "   %3d/%3d       %3d/%3d   ]\n\n",
253 	    ar->tx_stats[0].len, ar->tx_stats[0].limit,
254 	    ar->tx_stats[1].len, ar->tx_stats[1].limit,
255 	    ar->tx_stats[2].len, ar->tx_stats[2].limit,
256 	    ar->tx_stats[3].len, ar->tx_stats[3].limit);
257 
258 	ADD(buf, *len, bufsize, "[    total         total     "
259 				 "    total         total    ]\n"
260 				"[%10d    %10d    %10d    %10d   ]\n\n",
261 	    ar->tx_stats[0].count, ar->tx_stats[1].count,
262 	    ar->tx_stats[2].count, ar->tx_stats[3].count);
263 
264 	spin_unlock_bh(&ar->tx_stats_lock);
265 
266 	ADD(buf, *len, bufsize, "[  pend/waittx   pend/waittx "
267 				 "  pend/waittx   pend/waittx]\n"
268 				"[   %3d/%3d       %3d/%3d    "
269 				 "   %3d/%3d       %3d/%3d   ]\n\n",
270 	    skb_queue_len(&ar->tx_pending[0]),
271 	    skb_queue_len(&ar->tx_status[0]),
272 	    skb_queue_len(&ar->tx_pending[1]),
273 	    skb_queue_len(&ar->tx_status[1]),
274 	    skb_queue_len(&ar->tx_pending[2]),
275 	    skb_queue_len(&ar->tx_status[2]),
276 	    skb_queue_len(&ar->tx_pending[3]),
277 	    skb_queue_len(&ar->tx_status[3]));
278 
279 	return buf;
280 }
281 DEBUGFS_DECLARE_RO_FILE(qos_stat, 512);
282 
283 static void carl9170_debugfs_format_frame(struct ar9170 *ar,
284 	struct sk_buff *skb, const char *prefix, char *buf,
285 	ssize_t *off, ssize_t bufsize)
286 {
287 	struct _carl9170_tx_superframe *txc = (void *) skb->data;
288 	struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
289 	struct carl9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
290 	struct ieee80211_hdr *hdr = (void *) txc->frame_data;
291 
292 	ADD(buf, *off, bufsize, "%s %p, c:%2x, DA:%pM, sq:%4d, mc:%.4x, "
293 	    "pc:%.8x, to:%d ms\n", prefix, skb, txc->s.cookie,
294 	    ieee80211_get_DA(hdr), get_seq_h(hdr),
295 	    le16_to_cpu(txc->f.mac_control), le32_to_cpu(txc->f.phy_control),
296 	    jiffies_to_msecs(jiffies - arinfo->timeout));
297 }
298 
299 
300 static char *carl9170_debugfs_ampdu_state_read(struct ar9170 *ar, char *buf,
301 					       size_t bufsize, ssize_t *len)
302 {
303 	struct carl9170_sta_tid *iter;
304 	struct sk_buff *skb;
305 	int cnt = 0, fc;
306 	int offset;
307 
308 	rcu_read_lock();
309 	list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {
310 
311 		spin_lock_bh(&iter->lock);
312 		ADD(buf, *len, bufsize, "Entry: #%2d TID:%1d, BSN:%4d, "
313 		    "SNX:%4d, HSN:%4d, BAW:%2d, state:%1d, toggles:%d\n",
314 		    cnt, iter->tid, iter->bsn, iter->snx, iter->hsn,
315 		    iter->max, iter->state, iter->counter);
316 
317 		ADD(buf, *len, bufsize, "\tWindow:  [%*pb,W]\n",
318 		    CARL9170_BAW_BITS, iter->bitmap);
319 
320 #define BM_STR_OFF(offset)					\
321 	((CARL9170_BAW_BITS - (offset) - 1) / 4 +		\
322 	 (CARL9170_BAW_BITS - (offset) - 1) / 32 + 1)
323 
324 		offset = BM_STR_OFF(0);
325 		ADD(buf, *len, bufsize, "\tBase Seq: %*s\n", offset, "T");
326 
327 		offset = BM_STR_OFF(SEQ_DIFF(iter->snx, iter->bsn));
328 		ADD(buf, *len, bufsize, "\tNext Seq: %*s\n", offset, "W");
329 
330 		offset = BM_STR_OFF(((int)iter->hsn - (int)iter->bsn) %
331 				     CARL9170_BAW_BITS);
332 		ADD(buf, *len, bufsize, "\tLast Seq: %*s\n", offset, "N");
333 
334 		ADD(buf, *len, bufsize, "\tPre-Aggregation reorder buffer: "
335 		    " currently queued:%d\n", skb_queue_len(&iter->queue));
336 
337 		fc = 0;
338 		skb_queue_walk(&iter->queue, skb) {
339 			char prefix[32];
340 
341 			snprintf(prefix, sizeof(prefix), "\t\t%3d :", fc);
342 			carl9170_debugfs_format_frame(ar, skb, prefix, buf,
343 						      len, bufsize);
344 
345 			fc++;
346 		}
347 		spin_unlock_bh(&iter->lock);
348 		cnt++;
349 	}
350 	rcu_read_unlock();
351 
352 	return buf;
353 }
354 DEBUGFS_DECLARE_RO_FILE(ampdu_state, 8000);
355 
356 static void carl9170_debugfs_queue_dump(struct ar9170 *ar, char *buf,
357 	ssize_t *len, size_t bufsize, struct sk_buff_head *queue)
358 {
359 	struct sk_buff *skb;
360 	char prefix[16];
361 	int fc = 0;
362 
363 	spin_lock_bh(&queue->lock);
364 	skb_queue_walk(queue, skb) {
365 		snprintf(prefix, sizeof(prefix), "%3d :", fc);
366 		carl9170_debugfs_format_frame(ar, skb, prefix, buf,
367 					      len, bufsize);
368 		fc++;
369 	}
370 	spin_unlock_bh(&queue->lock);
371 }
372 
373 #define DEBUGFS_QUEUE_DUMP(q, qi)					\
374 static char *carl9170_debugfs_##q ##_##qi ##_read(struct ar9170 *ar,	\
375 	char *buf, size_t bufsize, ssize_t *len)			\
376 {									\
377 	carl9170_debugfs_queue_dump(ar, buf, len, bufsize, &ar->q[qi]);	\
378 	return buf;							\
379 }									\
380 DEBUGFS_DECLARE_RO_FILE(q##_##qi, 8000);
381 
382 static char *carl9170_debugfs_sta_psm_read(struct ar9170 *ar, char *buf,
383 					   size_t bufsize, ssize_t *len)
384 {
385 	ADD(buf, *len, bufsize, "psm state: %s\n", (ar->ps.off_override ?
386 	    "FORCE CAM" : (ar->ps.state ? "PSM" : "CAM")));
387 
388 	ADD(buf, *len, bufsize, "sleep duration: %d ms.\n", ar->ps.sleep_ms);
389 	ADD(buf, *len, bufsize, "last power-state transition: %d ms ago.\n",
390 	    jiffies_to_msecs(jiffies - ar->ps.last_action));
391 	ADD(buf, *len, bufsize, "last CAM->PSM transition: %d ms ago.\n",
392 	    jiffies_to_msecs(jiffies - ar->ps.last_slept));
393 
394 	return buf;
395 }
396 DEBUGFS_DECLARE_RO_FILE(sta_psm, 160);
397 
398 static char *carl9170_debugfs_tx_stuck_read(struct ar9170 *ar, char *buf,
399 					    size_t bufsize, ssize_t *len)
400 {
401 	int i;
402 
403 	for (i = 0; i < ar->hw->queues; i++) {
404 		ADD(buf, *len, bufsize, "TX queue [%d]: %10d max:%10d ms.\n",
405 		    i, ieee80211_queue_stopped(ar->hw, i) ?
406 		    jiffies_to_msecs(jiffies - ar->queue_stop_timeout[i]) : 0,
407 		    jiffies_to_msecs(ar->max_queue_stop_timeout[i]));
408 
409 		ar->max_queue_stop_timeout[i] = 0;
410 	}
411 
412 	return buf;
413 }
414 DEBUGFS_DECLARE_RO_FILE(tx_stuck, 180);
415 
416 static char *carl9170_debugfs_phy_noise_read(struct ar9170 *ar, char *buf,
417 					     size_t bufsize, ssize_t *len)
418 {
419 	int err;
420 
421 	err = carl9170_get_noisefloor(ar);
422 	if (err) {
423 		*len = err;
424 		return buf;
425 	}
426 
427 	ADD(buf, *len, bufsize, "Chain 0: %10d dBm, ext. chan.:%10d dBm\n",
428 	    ar->noise[0], ar->noise[2]);
429 	ADD(buf, *len, bufsize, "Chain 2: %10d dBm, ext. chan.:%10d dBm\n",
430 	    ar->noise[1], ar->noise[3]);
431 
432 	return buf;
433 }
434 DEBUGFS_DECLARE_RO_FILE(phy_noise, 180);
435 
436 static char *carl9170_debugfs_vif_dump_read(struct ar9170 *ar, char *buf,
437 					    size_t bufsize, ssize_t *len)
438 {
439 	struct carl9170_vif_info *iter;
440 	int i = 0;
441 
442 	ADD(buf, *len, bufsize, "registered VIFs:%d \\ %d\n",
443 	    ar->vifs, ar->fw.vif_num);
444 
445 	ADD(buf, *len, bufsize, "VIF bitmap: [%*pb]\n",
446 	    ar->fw.vif_num, &ar->vif_bitmap);
447 
448 	rcu_read_lock();
449 	list_for_each_entry_rcu(iter, &ar->vif_list, list) {
450 		struct ieee80211_vif *vif = carl9170_get_vif(iter);
451 		ADD(buf, *len, bufsize, "\t%d = [%s VIF, id:%d, type:%x "
452 		    " mac:%pM %s]\n", i, (carl9170_get_main_vif(ar) == vif ?
453 		    "Master" : " Slave"), iter->id, vif->type, vif->addr,
454 		    iter->enable_beacon ? "beaconing " : "");
455 		i++;
456 	}
457 	rcu_read_unlock();
458 
459 	return buf;
460 }
461 DEBUGFS_DECLARE_RO_FILE(vif_dump, 8000);
462 
463 #define UPDATE_COUNTER(ar, name)	({				\
464 	u32 __tmp[ARRAY_SIZE(name##_regs)];				\
465 	unsigned int __i, __err = -ENODEV;				\
466 									\
467 	for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {		\
468 		__tmp[__i] = name##_regs[__i].reg;			\
469 		ar->debug.stats.name##_counter[__i] = 0;		\
470 	}								\
471 									\
472 	if (IS_STARTED(ar))						\
473 		__err = carl9170_read_mreg(ar, ARRAY_SIZE(name##_regs),	\
474 			__tmp, ar->debug.stats.name##_counter);		\
475 	(__err); })
476 
477 #define TALLY_SUM_UP(ar, name)	do {					\
478 	unsigned int __i;						\
479 									\
480 	for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {		\
481 		ar->debug.stats.name##_sum[__i] +=			\
482 			ar->debug.stats.name##_counter[__i];		\
483 	}								\
484 } while (0)
485 
486 #define DEBUGFS_HW_TALLY_FILE(name, f)					\
487 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,	\
488 	 char *dum, size_t bufsize, ssize_t *ret)			\
489 {									\
490 	char *buf;							\
491 	int i, max_len, err;						\
492 									\
493 	max_len = ARRAY_SIZE(name##_regs) * 80;				\
494 	buf = vmalloc(max_len);						\
495 	if (!buf)							\
496 		return NULL;						\
497 									\
498 	err = UPDATE_COUNTER(ar, name);					\
499 	if (err) {							\
500 		*ret = err;						\
501 		return buf;						\
502 	}								\
503 									\
504 	TALLY_SUM_UP(ar, name);						\
505 									\
506 	for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {			\
507 		ADD(buf, *ret, max_len, "%22s = %" f "[+%" f "]\n",	\
508 		    name##_regs[i].nreg, ar->debug.stats.name ##_sum[i],\
509 		    ar->debug.stats.name ##_counter[i]);		\
510 	}								\
511 									\
512 	return buf;							\
513 }									\
514 DEBUGFS_DECLARE_RO_FILE(name, 0);
515 
516 #define DEBUGFS_HW_REG_FILE(name, f)					\
517 static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,	\
518 	char *dum, size_t bufsize, ssize_t *ret)			\
519 {									\
520 	char *buf;							\
521 	int i, max_len, err;						\
522 									\
523 	max_len = ARRAY_SIZE(name##_regs) * 80;				\
524 	buf = vmalloc(max_len);						\
525 	if (!buf)							\
526 		return NULL;						\
527 									\
528 	err = UPDATE_COUNTER(ar, name);					\
529 	if (err) {							\
530 		*ret = err;						\
531 		return buf;						\
532 	}								\
533 									\
534 	for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {			\
535 		ADD(buf, *ret, max_len, "%22s = %" f "\n",		\
536 		    name##_regs[i].nreg,				\
537 		    ar->debug.stats.name##_counter[i]);			\
538 	}								\
539 									\
540 	return buf;							\
541 }									\
542 DEBUGFS_DECLARE_RO_FILE(name, 0);
543 
544 static ssize_t carl9170_debugfs_hw_ioread32_write(struct ar9170 *ar,
545 	const char *buf, size_t count)
546 {
547 	int err = 0, i, n = 0, max_len = 32, res;
548 	unsigned int reg, tmp;
549 
550 	if (!count)
551 		return 0;
552 
553 	if (count > max_len)
554 		return -E2BIG;
555 
556 	res = sscanf(buf, "0x%X %d", &reg, &n);
557 	if (res < 1) {
558 		err = -EINVAL;
559 		goto out;
560 	}
561 
562 	if (res == 1)
563 		n = 1;
564 
565 	if (n > 15) {
566 		err = -EMSGSIZE;
567 		goto out;
568 	}
569 
570 	if ((reg >= 0x280000) || ((reg + (n << 2)) >= 0x280000)) {
571 		err = -EADDRNOTAVAIL;
572 		goto out;
573 	}
574 
575 	if (reg & 3) {
576 		err = -EINVAL;
577 		goto out;
578 	}
579 
580 	for (i = 0; i < n; i++) {
581 		err = carl9170_read_reg(ar, reg + (i << 2), &tmp);
582 		if (err)
583 			goto out;
584 
585 		ar->debug.ring[ar->debug.ring_tail].reg = reg + (i << 2);
586 		ar->debug.ring[ar->debug.ring_tail].value = tmp;
587 		ar->debug.ring_tail++;
588 		ar->debug.ring_tail %= CARL9170_DEBUG_RING_SIZE;
589 	}
590 
591 out:
592 	return err ? err : count;
593 }
594 
595 static char *carl9170_debugfs_hw_ioread32_read(struct ar9170 *ar, char *buf,
596 					       size_t bufsize, ssize_t *ret)
597 {
598 	int i = 0;
599 
600 	while (ar->debug.ring_head != ar->debug.ring_tail) {
601 		ADD(buf, *ret, bufsize, "%.8x = %.8x\n",
602 		    ar->debug.ring[ar->debug.ring_head].reg,
603 		    ar->debug.ring[ar->debug.ring_head].value);
604 
605 		ar->debug.ring_head++;
606 		ar->debug.ring_head %= CARL9170_DEBUG_RING_SIZE;
607 
608 		if (i++ == 64)
609 			break;
610 	}
611 	ar->debug.ring_head = ar->debug.ring_tail;
612 	return buf;
613 }
614 DEBUGFS_DECLARE_RW_FILE(hw_ioread32, CARL9170_DEBUG_RING_SIZE * 40);
615 
616 static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
617 					  size_t count)
618 {
619 	int err;
620 
621 	if (count < 1)
622 		return -EINVAL;
623 
624 	switch (buf[0]) {
625 	case 'F':
626 		ar->needs_full_reset = true;
627 		break;
628 
629 	case 'R':
630 		if (!IS_STARTED(ar)) {
631 			err = -EAGAIN;
632 			goto out;
633 		}
634 
635 		ar->needs_full_reset = false;
636 		break;
637 
638 	case 'M':
639 		err = carl9170_mac_reset(ar);
640 		if (err < 0)
641 			count = err;
642 
643 		goto out;
644 
645 	case 'P':
646 		err = carl9170_set_channel(ar, ar->hw->conf.chandef.chan,
647 			cfg80211_get_chandef_type(&ar->hw->conf.chandef));
648 		if (err < 0)
649 			count = err;
650 
651 		goto out;
652 
653 	default:
654 		return -EINVAL;
655 	}
656 
657 	carl9170_restart(ar, CARL9170_RR_USER_REQUEST);
658 
659 out:
660 	return count;
661 }
662 
663 static char *carl9170_debugfs_bug_read(struct ar9170 *ar, char *buf,
664 				       size_t bufsize, ssize_t *ret)
665 {
666 	ADD(buf, *ret, bufsize, "[P]hy reinit, [R]estart, [F]ull usb reset, "
667 	    "[M]ac reset\n");
668 	ADD(buf, *ret, bufsize, "firmware restarts:%d, last reason:%d\n",
669 		ar->restart_counter, ar->last_reason);
670 	ADD(buf, *ret, bufsize, "phy reinit errors:%d (%d)\n",
671 		ar->total_chan_fail, ar->chan_fail);
672 	ADD(buf, *ret, bufsize, "reported firmware errors:%d\n",
673 		ar->fw.err_counter);
674 	ADD(buf, *ret, bufsize, "reported firmware BUGs:%d\n",
675 		ar->fw.bug_counter);
676 	ADD(buf, *ret, bufsize, "pending restart requests:%d\n",
677 		atomic_read(&ar->pending_restarts));
678 	return buf;
679 }
680 __DEBUGFS_DECLARE_RW_FILE(bug, 400, CARL9170_STOPPED);
681 
682 static const char *const erp_modes[] = {
683 	[CARL9170_ERP_INVALID] = "INVALID",
684 	[CARL9170_ERP_AUTO] = "Automatic",
685 	[CARL9170_ERP_MAC80211] = "Set by MAC80211",
686 	[CARL9170_ERP_OFF] = "Force Off",
687 	[CARL9170_ERP_RTS] = "Force RTS",
688 	[CARL9170_ERP_CTS] = "Force CTS"
689 };
690 
691 static char *carl9170_debugfs_erp_read(struct ar9170 *ar, char *buf,
692 				       size_t bufsize, ssize_t *ret)
693 {
694 	ADD(buf, *ret, bufsize, "ERP Setting: (%d) -> %s\n", ar->erp_mode,
695 	    erp_modes[ar->erp_mode]);
696 	return buf;
697 }
698 
699 static ssize_t carl9170_debugfs_erp_write(struct ar9170 *ar, const char *buf,
700 					  size_t count)
701 {
702 	int res, val;
703 
704 	if (count < 1)
705 		return -EINVAL;
706 
707 	res = sscanf(buf, "%d", &val);
708 	if (res != 1)
709 		return -EINVAL;
710 
711 	if (!((val > CARL9170_ERP_INVALID) &&
712 	      (val < __CARL9170_ERP_NUM)))
713 		return -EINVAL;
714 
715 	ar->erp_mode = val;
716 	return count;
717 }
718 
719 DEBUGFS_DECLARE_RW_FILE(erp, 80);
720 
721 static ssize_t carl9170_debugfs_hw_iowrite32_write(struct ar9170 *ar,
722 	const char *buf, size_t count)
723 {
724 	int err = 0, max_len = 22, res;
725 	u32 reg, val;
726 
727 	if (!count)
728 		return 0;
729 
730 	if (count > max_len)
731 		return -E2BIG;
732 
733 	res = sscanf(buf, "0x%X 0x%X", &reg, &val);
734 	if (res != 2) {
735 		err = -EINVAL;
736 		goto out;
737 	}
738 
739 	if (reg <= 0x100000 || reg >= 0x280000) {
740 		err = -EADDRNOTAVAIL;
741 		goto out;
742 	}
743 
744 	if (reg & 3) {
745 		err = -EINVAL;
746 		goto out;
747 	}
748 
749 	err = carl9170_write_reg(ar, reg, val);
750 	if (err)
751 		goto out;
752 
753 out:
754 	return err ? err : count;
755 }
756 DEBUGFS_DECLARE_WO_FILE(hw_iowrite32);
757 
758 DEBUGFS_HW_TALLY_FILE(hw_tx_tally, "u");
759 DEBUGFS_HW_TALLY_FILE(hw_rx_tally, "u");
760 DEBUGFS_HW_TALLY_FILE(hw_phy_errors, "u");
761 DEBUGFS_HW_REG_FILE(hw_wlan_queue, ".8x");
762 DEBUGFS_HW_REG_FILE(hw_pta_queue, ".8x");
763 DEBUGFS_HW_REG_FILE(hw_ampdu_info, ".8x");
764 DEBUGFS_QUEUE_DUMP(tx_status, 0);
765 DEBUGFS_QUEUE_DUMP(tx_status, 1);
766 DEBUGFS_QUEUE_DUMP(tx_status, 2);
767 DEBUGFS_QUEUE_DUMP(tx_status, 3);
768 DEBUGFS_QUEUE_DUMP(tx_pending, 0);
769 DEBUGFS_QUEUE_DUMP(tx_pending, 1);
770 DEBUGFS_QUEUE_DUMP(tx_pending, 2);
771 DEBUGFS_QUEUE_DUMP(tx_pending, 3);
772 DEBUGFS_READONLY_FILE(usb_tx_anch_urbs, 20, "%d",
773 		      atomic_read(&ar->tx_anch_urbs));
774 DEBUGFS_READONLY_FILE(usb_rx_anch_urbs, 20, "%d",
775 		      atomic_read(&ar->rx_anch_urbs));
776 DEBUGFS_READONLY_FILE(usb_rx_work_urbs, 20, "%d",
777 		      atomic_read(&ar->rx_work_urbs));
778 DEBUGFS_READONLY_FILE(usb_rx_pool_urbs, 20, "%d",
779 		      atomic_read(&ar->rx_pool_urbs));
780 
781 DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d",
782 		      atomic_read(&ar->tx_total_queued));
783 DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d",
784 		      atomic_read(&ar->tx_ampdu_scheduler));
785 
786 DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d",
787 		      atomic_read(&ar->tx_total_pending));
788 
789 DEBUGFS_READONLY_FILE(tx_ampdu_list_len, 20, "%d",
790 		      ar->tx_ampdu_list_len);
791 
792 DEBUGFS_READONLY_FILE(tx_ampdu_upload, 20, "%d",
793 		      atomic_read(&ar->tx_ampdu_upload));
794 
795 DEBUGFS_READONLY_FILE(tx_janitor_last_run, 64, "last run:%d ms ago",
796 	jiffies_to_msecs(jiffies - ar->tx_janitor_last_run));
797 
798 DEBUGFS_READONLY_FILE(tx_dropped, 20, "%d", ar->tx_dropped);
799 
800 DEBUGFS_READONLY_FILE(rx_dropped, 20, "%d", ar->rx_dropped);
801 
802 DEBUGFS_READONLY_FILE(sniffer_enabled, 20, "%d", ar->sniffer_enabled);
803 DEBUGFS_READONLY_FILE(rx_software_decryption, 20, "%d",
804 		      ar->rx_software_decryption);
805 DEBUGFS_READONLY_FILE(ampdu_factor, 20, "%d",
806 		      ar->current_factor);
807 DEBUGFS_READONLY_FILE(ampdu_density, 20, "%d",
808 		      ar->current_density);
809 
810 DEBUGFS_READONLY_FILE(beacon_int, 20, "%d TU", ar->global_beacon_int);
811 DEBUGFS_READONLY_FILE(pretbtt, 20, "%d TU", ar->global_pretbtt);
812 
813 void carl9170_debugfs_register(struct ar9170 *ar)
814 {
815 	ar->debug_dir = debugfs_create_dir(KBUILD_MODNAME,
816 		ar->hw->wiphy->debugfsdir);
817 
818 #define DEBUGFS_ADD(name)						\
819 	debugfs_create_file(#name, carl_debugfs_##name ##_ops.attr,	\
820 			    ar->debug_dir, ar,				\
821 			    &carl_debugfs_##name ## _ops.fops);
822 
823 	DEBUGFS_ADD(usb_tx_anch_urbs);
824 	DEBUGFS_ADD(usb_rx_pool_urbs);
825 	DEBUGFS_ADD(usb_rx_anch_urbs);
826 	DEBUGFS_ADD(usb_rx_work_urbs);
827 
828 	DEBUGFS_ADD(tx_total_queued);
829 	DEBUGFS_ADD(tx_total_pending);
830 	DEBUGFS_ADD(tx_dropped);
831 	DEBUGFS_ADD(tx_stuck);
832 	DEBUGFS_ADD(tx_ampdu_upload);
833 	DEBUGFS_ADD(tx_ampdu_scheduler);
834 	DEBUGFS_ADD(tx_ampdu_list_len);
835 
836 	DEBUGFS_ADD(rx_dropped);
837 	DEBUGFS_ADD(sniffer_enabled);
838 	DEBUGFS_ADD(rx_software_decryption);
839 
840 	DEBUGFS_ADD(mem_usage);
841 	DEBUGFS_ADD(qos_stat);
842 	DEBUGFS_ADD(sta_psm);
843 	DEBUGFS_ADD(ampdu_state);
844 
845 	DEBUGFS_ADD(hw_tx_tally);
846 	DEBUGFS_ADD(hw_rx_tally);
847 	DEBUGFS_ADD(hw_phy_errors);
848 	DEBUGFS_ADD(phy_noise);
849 
850 	DEBUGFS_ADD(hw_wlan_queue);
851 	DEBUGFS_ADD(hw_pta_queue);
852 	DEBUGFS_ADD(hw_ampdu_info);
853 
854 	DEBUGFS_ADD(ampdu_density);
855 	DEBUGFS_ADD(ampdu_factor);
856 
857 	DEBUGFS_ADD(tx_janitor_last_run);
858 
859 	DEBUGFS_ADD(tx_status_0);
860 	DEBUGFS_ADD(tx_status_1);
861 	DEBUGFS_ADD(tx_status_2);
862 	DEBUGFS_ADD(tx_status_3);
863 
864 	DEBUGFS_ADD(tx_pending_0);
865 	DEBUGFS_ADD(tx_pending_1);
866 	DEBUGFS_ADD(tx_pending_2);
867 	DEBUGFS_ADD(tx_pending_3);
868 
869 	DEBUGFS_ADD(hw_ioread32);
870 	DEBUGFS_ADD(hw_iowrite32);
871 	DEBUGFS_ADD(bug);
872 
873 	DEBUGFS_ADD(erp);
874 
875 	DEBUGFS_ADD(vif_dump);
876 
877 	DEBUGFS_ADD(beacon_int);
878 	DEBUGFS_ADD(pretbtt);
879 
880 #undef DEBUGFS_ADD
881 }
882 
883 void carl9170_debugfs_unregister(struct ar9170 *ar)
884 {
885 	debugfs_remove_recursive(ar->debug_dir);
886 }
887