1 /*
2  * Copyright (c) 2004-2011 Atheros Communications Inc.
3  * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.
4  *
5  * Permission to use, copy, modify, and/or distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include "core.h"
19 
20 #include <linux/skbuff.h>
21 #include <linux/fs.h>
22 #include <linux/vmalloc.h>
23 #include <linux/export.h>
24 
25 #include "debug.h"
26 #include "target.h"
27 
28 struct ath6kl_fwlog_slot {
29 	__le32 timestamp;
30 	__le32 length;
31 
32 	/* max ATH6KL_FWLOG_PAYLOAD_SIZE bytes */
33 	u8 payload[];
34 };
35 
36 #define ATH6KL_FWLOG_MAX_ENTRIES 20
37 
38 #define ATH6KL_FWLOG_VALID_MASK 0x1ffff
39 
40 void ath6kl_printk(const char *level, const char *fmt, ...)
41 {
42 	struct va_format vaf;
43 	va_list args;
44 
45 	va_start(args, fmt);
46 
47 	vaf.fmt = fmt;
48 	vaf.va = &args;
49 
50 	printk("%sath6kl: %pV", level, &vaf);
51 
52 	va_end(args);
53 }
54 EXPORT_SYMBOL(ath6kl_printk);
55 
56 void ath6kl_info(const char *fmt, ...)
57 {
58 	struct va_format vaf = {
59 		.fmt = fmt,
60 	};
61 	va_list args;
62 
63 	va_start(args, fmt);
64 	vaf.va = &args;
65 	ath6kl_printk(KERN_INFO, "%pV", &vaf);
66 	trace_ath6kl_log_info(&vaf);
67 	va_end(args);
68 }
69 EXPORT_SYMBOL(ath6kl_info);
70 
71 void ath6kl_err(const char *fmt, ...)
72 {
73 	struct va_format vaf = {
74 		.fmt = fmt,
75 	};
76 	va_list args;
77 
78 	va_start(args, fmt);
79 	vaf.va = &args;
80 	ath6kl_printk(KERN_ERR, "%pV", &vaf);
81 	trace_ath6kl_log_err(&vaf);
82 	va_end(args);
83 }
84 EXPORT_SYMBOL(ath6kl_err);
85 
86 void ath6kl_warn(const char *fmt, ...)
87 {
88 	struct va_format vaf = {
89 		.fmt = fmt,
90 	};
91 	va_list args;
92 
93 	va_start(args, fmt);
94 	vaf.va = &args;
95 	ath6kl_printk(KERN_WARNING, "%pV", &vaf);
96 	trace_ath6kl_log_warn(&vaf);
97 	va_end(args);
98 }
99 EXPORT_SYMBOL(ath6kl_warn);
100 
101 int ath6kl_read_tgt_stats(struct ath6kl *ar, struct ath6kl_vif *vif)
102 {
103 	long left;
104 
105 	if (down_interruptible(&ar->sem))
106 		return -EBUSY;
107 
108 	set_bit(STATS_UPDATE_PEND, &vif->flags);
109 
110 	if (ath6kl_wmi_get_stats_cmd(ar->wmi, 0)) {
111 		up(&ar->sem);
112 		return -EIO;
113 	}
114 
115 	left = wait_event_interruptible_timeout(ar->event_wq,
116 						!test_bit(STATS_UPDATE_PEND,
117 						&vif->flags), WMI_TIMEOUT);
118 
119 	up(&ar->sem);
120 
121 	if (left <= 0)
122 		return -ETIMEDOUT;
123 
124 	return 0;
125 }
126 EXPORT_SYMBOL(ath6kl_read_tgt_stats);
127 
128 #ifdef CONFIG_ATH6KL_DEBUG
129 
130 void ath6kl_dbg(enum ATH6K_DEBUG_MASK mask, const char *fmt, ...)
131 {
132 	struct va_format vaf;
133 	va_list args;
134 
135 	va_start(args, fmt);
136 
137 	vaf.fmt = fmt;
138 	vaf.va = &args;
139 
140 	if (debug_mask & mask)
141 		ath6kl_printk(KERN_DEBUG, "%pV", &vaf);
142 
143 	trace_ath6kl_log_dbg(mask, &vaf);
144 
145 	va_end(args);
146 }
147 EXPORT_SYMBOL(ath6kl_dbg);
148 
149 void ath6kl_dbg_dump(enum ATH6K_DEBUG_MASK mask,
150 		     const char *msg, const char *prefix,
151 		     const void *buf, size_t len)
152 {
153 	if (debug_mask & mask) {
154 		if (msg)
155 			ath6kl_dbg(mask, "%s\n", msg);
156 
157 		print_hex_dump_bytes(prefix, DUMP_PREFIX_OFFSET, buf, len);
158 	}
159 
160 	/* tracing code doesn't like null strings :/ */
161 	trace_ath6kl_log_dbg_dump(msg ? msg : "", prefix ? prefix : "",
162 				  buf, len);
163 }
164 EXPORT_SYMBOL(ath6kl_dbg_dump);
165 
166 #define REG_OUTPUT_LEN_PER_LINE	25
167 #define REGTYPE_STR_LEN		100
168 
169 struct ath6kl_diag_reg_info {
170 	u32 reg_start;
171 	u32 reg_end;
172 	const char *reg_info;
173 };
174 
175 static const struct ath6kl_diag_reg_info diag_reg[] = {
176 	{ 0x20000, 0x200fc, "General DMA and Rx registers" },
177 	{ 0x28000, 0x28900, "MAC PCU register & keycache" },
178 	{ 0x20800, 0x20a40, "QCU" },
179 	{ 0x21000, 0x212f0, "DCU" },
180 	{ 0x4000,  0x42e4, "RTC" },
181 	{ 0x540000, 0x540000 + (256 * 1024), "RAM" },
182 	{ 0x29800, 0x2B210, "Base Band" },
183 	{ 0x1C000, 0x1C748, "Analog" },
184 };
185 
186 void ath6kl_dump_registers(struct ath6kl_device *dev,
187 			   struct ath6kl_irq_proc_registers *irq_proc_reg,
188 			   struct ath6kl_irq_enable_reg *irq_enable_reg)
189 {
190 	ath6kl_dbg(ATH6KL_DBG_IRQ, ("<------- Register Table -------->\n"));
191 
192 	if (irq_proc_reg != NULL) {
193 		ath6kl_dbg(ATH6KL_DBG_IRQ,
194 			   "Host Int status:           0x%x\n",
195 			   irq_proc_reg->host_int_status);
196 		ath6kl_dbg(ATH6KL_DBG_IRQ,
197 			   "CPU Int status:            0x%x\n",
198 			   irq_proc_reg->cpu_int_status);
199 		ath6kl_dbg(ATH6KL_DBG_IRQ,
200 			   "Error Int status:          0x%x\n",
201 			   irq_proc_reg->error_int_status);
202 		ath6kl_dbg(ATH6KL_DBG_IRQ,
203 			   "Counter Int status:        0x%x\n",
204 			   irq_proc_reg->counter_int_status);
205 		ath6kl_dbg(ATH6KL_DBG_IRQ,
206 			   "Mbox Frame:                0x%x\n",
207 			   irq_proc_reg->mbox_frame);
208 		ath6kl_dbg(ATH6KL_DBG_IRQ,
209 			   "Rx Lookahead Valid:        0x%x\n",
210 			   irq_proc_reg->rx_lkahd_valid);
211 		ath6kl_dbg(ATH6KL_DBG_IRQ,
212 			   "Rx Lookahead 0:            0x%x\n",
213 			   irq_proc_reg->rx_lkahd[0]);
214 		ath6kl_dbg(ATH6KL_DBG_IRQ,
215 			   "Rx Lookahead 1:            0x%x\n",
216 			   irq_proc_reg->rx_lkahd[1]);
217 
218 		if (dev->ar->mbox_info.gmbox_addr != 0) {
219 			/*
220 			 * If the target supports GMBOX hardware, dump some
221 			 * additional state.
222 			 */
223 			ath6kl_dbg(ATH6KL_DBG_IRQ,
224 				   "GMBOX Host Int status 2:   0x%x\n",
225 				   irq_proc_reg->host_int_status2);
226 			ath6kl_dbg(ATH6KL_DBG_IRQ,
227 				   "GMBOX RX Avail:            0x%x\n",
228 				   irq_proc_reg->gmbox_rx_avail);
229 			ath6kl_dbg(ATH6KL_DBG_IRQ,
230 				   "GMBOX lookahead alias 0:   0x%x\n",
231 				   irq_proc_reg->rx_gmbox_lkahd_alias[0]);
232 			ath6kl_dbg(ATH6KL_DBG_IRQ,
233 				   "GMBOX lookahead alias 1:   0x%x\n",
234 				   irq_proc_reg->rx_gmbox_lkahd_alias[1]);
235 		}
236 	}
237 
238 	if (irq_enable_reg != NULL) {
239 		ath6kl_dbg(ATH6KL_DBG_IRQ,
240 			   "Int status Enable:         0x%x\n",
241 			   irq_enable_reg->int_status_en);
242 		ath6kl_dbg(ATH6KL_DBG_IRQ, "Counter Int status Enable: 0x%x\n",
243 			   irq_enable_reg->cntr_int_status_en);
244 	}
245 	ath6kl_dbg(ATH6KL_DBG_IRQ, "<------------------------------->\n");
246 }
247 
248 static void dump_cred_dist(struct htc_endpoint_credit_dist *ep_dist)
249 {
250 	ath6kl_dbg(ATH6KL_DBG_CREDIT,
251 		   "--- endpoint: %d  svc_id: 0x%X ---\n",
252 		   ep_dist->endpoint, ep_dist->svc_id);
253 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " dist_flags     : 0x%X\n",
254 		   ep_dist->dist_flags);
255 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_norm      : %d\n",
256 		   ep_dist->cred_norm);
257 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_min       : %d\n",
258 		   ep_dist->cred_min);
259 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " credits        : %d\n",
260 		   ep_dist->credits);
261 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_assngd    : %d\n",
262 		   ep_dist->cred_assngd);
263 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " seek_cred      : %d\n",
264 		   ep_dist->seek_cred);
265 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_sz        : %d\n",
266 		   ep_dist->cred_sz);
267 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_per_msg   : %d\n",
268 		   ep_dist->cred_per_msg);
269 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " cred_to_dist   : %d\n",
270 		   ep_dist->cred_to_dist);
271 	ath6kl_dbg(ATH6KL_DBG_CREDIT, " txq_depth      : %d\n",
272 		   get_queue_depth(&ep_dist->htc_ep->txq));
273 	ath6kl_dbg(ATH6KL_DBG_CREDIT,
274 		   "----------------------------------\n");
275 }
276 
277 /* FIXME: move to htc.c */
278 void dump_cred_dist_stats(struct htc_target *target)
279 {
280 	struct htc_endpoint_credit_dist *ep_list;
281 
282 	list_for_each_entry(ep_list, &target->cred_dist_list, list)
283 		dump_cred_dist(ep_list);
284 
285 	ath6kl_dbg(ATH6KL_DBG_CREDIT,
286 		   "credit distribution total %d free %d\n",
287 		   target->credit_info->total_avail_credits,
288 		   target->credit_info->cur_free_credits);
289 }
290 
291 void ath6kl_debug_war(struct ath6kl *ar, enum ath6kl_war war)
292 {
293 	switch (war) {
294 	case ATH6KL_WAR_INVALID_RATE:
295 		ar->debug.war_stats.invalid_rate++;
296 		break;
297 	}
298 }
299 
300 static ssize_t read_file_war_stats(struct file *file, char __user *user_buf,
301 				   size_t count, loff_t *ppos)
302 {
303 	struct ath6kl *ar = file->private_data;
304 	char *buf;
305 	unsigned int len = 0, buf_len = 1500;
306 	ssize_t ret_cnt;
307 
308 	buf = kzalloc(buf_len, GFP_KERNEL);
309 	if (!buf)
310 		return -ENOMEM;
311 
312 	len += scnprintf(buf + len, buf_len - len, "\n");
313 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
314 			 "Workaround stats");
315 	len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
316 			 "=================");
317 	len += scnprintf(buf + len, buf_len - len, "%20s %10u\n",
318 			 "Invalid rates", ar->debug.war_stats.invalid_rate);
319 
320 	if (WARN_ON(len > buf_len))
321 		len = buf_len;
322 
323 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
324 
325 	kfree(buf);
326 	return ret_cnt;
327 }
328 
329 static const struct file_operations fops_war_stats = {
330 	.read = read_file_war_stats,
331 	.open = simple_open,
332 	.owner = THIS_MODULE,
333 	.llseek = default_llseek,
334 };
335 
336 void ath6kl_debug_fwlog_event(struct ath6kl *ar, const void *buf, size_t len)
337 {
338 	struct ath6kl_fwlog_slot *slot;
339 	struct sk_buff *skb;
340 	size_t slot_len;
341 
342 	if (WARN_ON(len > ATH6KL_FWLOG_PAYLOAD_SIZE))
343 		return;
344 
345 	slot_len = sizeof(*slot) + ATH6KL_FWLOG_PAYLOAD_SIZE;
346 
347 	skb = alloc_skb(slot_len, GFP_KERNEL);
348 	if (!skb)
349 		return;
350 
351 	slot = skb_put(skb, slot_len);
352 	slot->timestamp = cpu_to_le32(jiffies);
353 	slot->length = cpu_to_le32(len);
354 	memcpy(slot->payload, buf, len);
355 
356 	/* Need to pad each record to fixed length ATH6KL_FWLOG_PAYLOAD_SIZE */
357 	memset(slot->payload + len, 0, ATH6KL_FWLOG_PAYLOAD_SIZE - len);
358 
359 	spin_lock(&ar->debug.fwlog_queue.lock);
360 
361 	__skb_queue_tail(&ar->debug.fwlog_queue, skb);
362 	complete(&ar->debug.fwlog_completion);
363 
364 	/* drop oldest entries */
365 	while (skb_queue_len(&ar->debug.fwlog_queue) >
366 	       ATH6KL_FWLOG_MAX_ENTRIES) {
367 		skb = __skb_dequeue(&ar->debug.fwlog_queue);
368 		kfree_skb(skb);
369 	}
370 
371 	spin_unlock(&ar->debug.fwlog_queue.lock);
372 
373 	return;
374 }
375 
376 static int ath6kl_fwlog_open(struct inode *inode, struct file *file)
377 {
378 	struct ath6kl *ar = inode->i_private;
379 
380 	if (ar->debug.fwlog_open)
381 		return -EBUSY;
382 
383 	ar->debug.fwlog_open = true;
384 
385 	file->private_data = inode->i_private;
386 	return 0;
387 }
388 
389 static int ath6kl_fwlog_release(struct inode *inode, struct file *file)
390 {
391 	struct ath6kl *ar = inode->i_private;
392 
393 	ar->debug.fwlog_open = false;
394 
395 	return 0;
396 }
397 
398 static ssize_t ath6kl_fwlog_read(struct file *file, char __user *user_buf,
399 				 size_t count, loff_t *ppos)
400 {
401 	struct ath6kl *ar = file->private_data;
402 	struct sk_buff *skb;
403 	ssize_t ret_cnt;
404 	size_t len = 0;
405 	char *buf;
406 
407 	buf = vmalloc(count);
408 	if (!buf)
409 		return -ENOMEM;
410 
411 	/* read undelivered logs from firmware */
412 	ath6kl_read_fwlogs(ar);
413 
414 	spin_lock(&ar->debug.fwlog_queue.lock);
415 
416 	while ((skb = __skb_dequeue(&ar->debug.fwlog_queue))) {
417 		if (skb->len > count - len) {
418 			/* not enough space, put skb back and leave */
419 			__skb_queue_head(&ar->debug.fwlog_queue, skb);
420 			break;
421 		}
422 
423 
424 		memcpy(buf + len, skb->data, skb->len);
425 		len += skb->len;
426 
427 		kfree_skb(skb);
428 	}
429 
430 	spin_unlock(&ar->debug.fwlog_queue.lock);
431 
432 	/* FIXME: what to do if len == 0? */
433 
434 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
435 
436 	vfree(buf);
437 
438 	return ret_cnt;
439 }
440 
441 static const struct file_operations fops_fwlog = {
442 	.open = ath6kl_fwlog_open,
443 	.release = ath6kl_fwlog_release,
444 	.read = ath6kl_fwlog_read,
445 	.owner = THIS_MODULE,
446 	.llseek = default_llseek,
447 };
448 
449 static ssize_t ath6kl_fwlog_block_read(struct file *file,
450 				       char __user *user_buf,
451 				       size_t count,
452 				       loff_t *ppos)
453 {
454 	struct ath6kl *ar = file->private_data;
455 	struct sk_buff *skb;
456 	ssize_t ret_cnt;
457 	size_t len = 0, not_copied;
458 	char *buf;
459 	int ret;
460 
461 	buf = vmalloc(count);
462 	if (!buf)
463 		return -ENOMEM;
464 
465 	spin_lock(&ar->debug.fwlog_queue.lock);
466 
467 	if (skb_queue_len(&ar->debug.fwlog_queue) == 0) {
468 		/* we must init under queue lock */
469 		init_completion(&ar->debug.fwlog_completion);
470 
471 		spin_unlock(&ar->debug.fwlog_queue.lock);
472 
473 		ret = wait_for_completion_interruptible(
474 			&ar->debug.fwlog_completion);
475 		if (ret == -ERESTARTSYS) {
476 			vfree(buf);
477 			return ret;
478 		}
479 
480 		spin_lock(&ar->debug.fwlog_queue.lock);
481 	}
482 
483 	while ((skb = __skb_dequeue(&ar->debug.fwlog_queue))) {
484 		if (skb->len > count - len) {
485 			/* not enough space, put skb back and leave */
486 			__skb_queue_head(&ar->debug.fwlog_queue, skb);
487 			break;
488 		}
489 
490 
491 		memcpy(buf + len, skb->data, skb->len);
492 		len += skb->len;
493 
494 		kfree_skb(skb);
495 	}
496 
497 	spin_unlock(&ar->debug.fwlog_queue.lock);
498 
499 	/* FIXME: what to do if len == 0? */
500 
501 	not_copied = copy_to_user(user_buf, buf, len);
502 	if (not_copied != 0) {
503 		ret_cnt = -EFAULT;
504 		goto out;
505 	}
506 
507 	*ppos = *ppos + len;
508 
509 	ret_cnt = len;
510 
511 out:
512 	vfree(buf);
513 
514 	return ret_cnt;
515 }
516 
517 static const struct file_operations fops_fwlog_block = {
518 	.open = ath6kl_fwlog_open,
519 	.release = ath6kl_fwlog_release,
520 	.read = ath6kl_fwlog_block_read,
521 	.owner = THIS_MODULE,
522 	.llseek = default_llseek,
523 };
524 
525 static ssize_t ath6kl_fwlog_mask_read(struct file *file, char __user *user_buf,
526 				      size_t count, loff_t *ppos)
527 {
528 	struct ath6kl *ar = file->private_data;
529 	char buf[16];
530 	int len;
531 
532 	len = snprintf(buf, sizeof(buf), "0x%x\n", ar->debug.fwlog_mask);
533 
534 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
535 }
536 
537 static ssize_t ath6kl_fwlog_mask_write(struct file *file,
538 				       const char __user *user_buf,
539 				       size_t count, loff_t *ppos)
540 {
541 	struct ath6kl *ar = file->private_data;
542 	int ret;
543 
544 	ret = kstrtou32_from_user(user_buf, count, 0, &ar->debug.fwlog_mask);
545 	if (ret)
546 		return ret;
547 
548 	ret = ath6kl_wmi_config_debug_module_cmd(ar->wmi,
549 						 ATH6KL_FWLOG_VALID_MASK,
550 						 ar->debug.fwlog_mask);
551 	if (ret)
552 		return ret;
553 
554 	return count;
555 }
556 
557 static const struct file_operations fops_fwlog_mask = {
558 	.open = simple_open,
559 	.read = ath6kl_fwlog_mask_read,
560 	.write = ath6kl_fwlog_mask_write,
561 	.owner = THIS_MODULE,
562 	.llseek = default_llseek,
563 };
564 
565 static ssize_t read_file_tgt_stats(struct file *file, char __user *user_buf,
566 				   size_t count, loff_t *ppos)
567 {
568 	struct ath6kl *ar = file->private_data;
569 	struct ath6kl_vif *vif;
570 	struct target_stats *tgt_stats;
571 	char *buf;
572 	unsigned int len = 0, buf_len = 1500;
573 	int i;
574 	ssize_t ret_cnt;
575 	int rv;
576 
577 	vif = ath6kl_vif_first(ar);
578 	if (!vif)
579 		return -EIO;
580 
581 	buf = kzalloc(buf_len, GFP_KERNEL);
582 	if (!buf)
583 		return -ENOMEM;
584 
585 	rv = ath6kl_read_tgt_stats(ar, vif);
586 	if (rv < 0) {
587 		kfree(buf);
588 		return rv;
589 	}
590 
591 	tgt_stats = &vif->target_stats;
592 
593 	len += scnprintf(buf + len, buf_len - len, "\n");
594 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
595 			 "Target Tx stats");
596 	len += scnprintf(buf + len, buf_len - len, "%25s\n\n",
597 			 "=================");
598 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
599 			 "Ucast packets", tgt_stats->tx_ucast_pkt);
600 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
601 			 "Bcast packets", tgt_stats->tx_bcast_pkt);
602 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
603 			 "Ucast byte", tgt_stats->tx_ucast_byte);
604 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
605 			 "Bcast byte", tgt_stats->tx_bcast_byte);
606 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
607 			 "Rts success cnt", tgt_stats->tx_rts_success_cnt);
608 	for (i = 0; i < 4; i++)
609 		len += scnprintf(buf + len, buf_len - len,
610 				 "%18s %d %10llu\n", "PER on ac",
611 				 i, tgt_stats->tx_pkt_per_ac[i]);
612 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
613 			 "Error", tgt_stats->tx_err);
614 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
615 			 "Fail count", tgt_stats->tx_fail_cnt);
616 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
617 			 "Retry count", tgt_stats->tx_retry_cnt);
618 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
619 			 "Multi retry cnt", tgt_stats->tx_mult_retry_cnt);
620 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
621 			 "Rts fail cnt", tgt_stats->tx_rts_fail_cnt);
622 	len += scnprintf(buf + len, buf_len - len, "%25s %10llu\n\n",
623 			 "TKIP counter measure used",
624 			 tgt_stats->tkip_cnter_measures_invoked);
625 
626 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
627 			 "Target Rx stats");
628 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
629 			 "=================");
630 
631 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
632 			 "Ucast packets", tgt_stats->rx_ucast_pkt);
633 	len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
634 			 "Ucast Rate", tgt_stats->rx_ucast_rate);
635 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
636 			 "Bcast packets", tgt_stats->rx_bcast_pkt);
637 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
638 			 "Ucast byte", tgt_stats->rx_ucast_byte);
639 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
640 			 "Bcast byte", tgt_stats->rx_bcast_byte);
641 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
642 			 "Fragmented pkt", tgt_stats->rx_frgment_pkt);
643 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
644 			 "Error", tgt_stats->rx_err);
645 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
646 			 "CRC Err", tgt_stats->rx_crc_err);
647 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
648 			 "Key cache miss", tgt_stats->rx_key_cache_miss);
649 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
650 			 "Decrypt Err", tgt_stats->rx_decrypt_err);
651 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
652 			 "Duplicate frame", tgt_stats->rx_dupl_frame);
653 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
654 			 "Tkip Mic failure", tgt_stats->tkip_local_mic_fail);
655 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
656 			 "TKIP format err", tgt_stats->tkip_fmt_err);
657 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
658 			 "CCMP format Err", tgt_stats->ccmp_fmt_err);
659 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n\n",
660 			 "CCMP Replay Err", tgt_stats->ccmp_replays);
661 
662 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
663 			 "Misc Target stats");
664 	len += scnprintf(buf + len, buf_len - len, "%25s\n",
665 			 "=================");
666 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
667 			 "Beacon Miss count", tgt_stats->cs_bmiss_cnt);
668 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
669 			 "Num Connects", tgt_stats->cs_connect_cnt);
670 	len += scnprintf(buf + len, buf_len - len, "%20s %10llu\n",
671 			 "Num disconnects", tgt_stats->cs_discon_cnt);
672 	len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
673 			 "Beacon avg rssi", tgt_stats->cs_ave_beacon_rssi);
674 	len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
675 			 "ARP pkt received", tgt_stats->arp_received);
676 	len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
677 			 "ARP pkt matched", tgt_stats->arp_matched);
678 	len += scnprintf(buf + len, buf_len - len, "%20s %10d\n",
679 			 "ARP pkt replied", tgt_stats->arp_replied);
680 
681 	if (len > buf_len)
682 		len = buf_len;
683 
684 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
685 
686 	kfree(buf);
687 	return ret_cnt;
688 }
689 
690 static const struct file_operations fops_tgt_stats = {
691 	.read = read_file_tgt_stats,
692 	.open = simple_open,
693 	.owner = THIS_MODULE,
694 	.llseek = default_llseek,
695 };
696 
697 #define print_credit_info(fmt_str, ep_list_field)		\
698 	(len += scnprintf(buf + len, buf_len - len, fmt_str,	\
699 			 ep_list->ep_list_field))
700 #define CREDIT_INFO_DISPLAY_STRING_LEN	200
701 #define CREDIT_INFO_LEN	128
702 
703 static ssize_t read_file_credit_dist_stats(struct file *file,
704 					   char __user *user_buf,
705 					   size_t count, loff_t *ppos)
706 {
707 	struct ath6kl *ar = file->private_data;
708 	struct htc_target *target = ar->htc_target;
709 	struct htc_endpoint_credit_dist *ep_list;
710 	char *buf;
711 	unsigned int buf_len, len = 0;
712 	ssize_t ret_cnt;
713 
714 	buf_len = CREDIT_INFO_DISPLAY_STRING_LEN +
715 		  get_queue_depth(&target->cred_dist_list) * CREDIT_INFO_LEN;
716 	buf = kzalloc(buf_len, GFP_KERNEL);
717 	if (!buf)
718 		return -ENOMEM;
719 
720 	len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
721 			 "Total Avail Credits: ",
722 			 target->credit_info->total_avail_credits);
723 	len += scnprintf(buf + len, buf_len - len, "%25s%5d\n",
724 			 "Free credits :",
725 			 target->credit_info->cur_free_credits);
726 
727 	len += scnprintf(buf + len, buf_len - len,
728 			 " Epid  Flags    Cred_norm  Cred_min  Credits  Cred_assngd"
729 			 "  Seek_cred  Cred_sz  Cred_per_msg  Cred_to_dist"
730 			 "  qdepth\n");
731 
732 	list_for_each_entry(ep_list, &target->cred_dist_list, list) {
733 		print_credit_info("  %2d", endpoint);
734 		print_credit_info("%10x", dist_flags);
735 		print_credit_info("%8d", cred_norm);
736 		print_credit_info("%9d", cred_min);
737 		print_credit_info("%9d", credits);
738 		print_credit_info("%10d", cred_assngd);
739 		print_credit_info("%13d", seek_cred);
740 		print_credit_info("%12d", cred_sz);
741 		print_credit_info("%9d", cred_per_msg);
742 		print_credit_info("%14d", cred_to_dist);
743 		len += scnprintf(buf + len, buf_len - len, "%12d\n",
744 				 get_queue_depth(&ep_list->htc_ep->txq));
745 	}
746 
747 	if (len > buf_len)
748 		len = buf_len;
749 
750 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
751 	kfree(buf);
752 	return ret_cnt;
753 }
754 
755 static const struct file_operations fops_credit_dist_stats = {
756 	.read = read_file_credit_dist_stats,
757 	.open = simple_open,
758 	.owner = THIS_MODULE,
759 	.llseek = default_llseek,
760 };
761 
762 static unsigned int print_endpoint_stat(struct htc_target *target, char *buf,
763 					unsigned int buf_len, unsigned int len,
764 					int offset, const char *name)
765 {
766 	int i;
767 	struct htc_endpoint_stats *ep_st;
768 	u32 *counter;
769 
770 	len += scnprintf(buf + len, buf_len - len, "%s:", name);
771 	for (i = 0; i < ENDPOINT_MAX; i++) {
772 		ep_st = &target->endpoint[i].ep_st;
773 		counter = ((u32 *) ep_st) + (offset / 4);
774 		len += scnprintf(buf + len, buf_len - len, " %u", *counter);
775 	}
776 	len += scnprintf(buf + len, buf_len - len, "\n");
777 
778 	return len;
779 }
780 
781 static ssize_t ath6kl_endpoint_stats_read(struct file *file,
782 					  char __user *user_buf,
783 					  size_t count, loff_t *ppos)
784 {
785 	struct ath6kl *ar = file->private_data;
786 	struct htc_target *target = ar->htc_target;
787 	char *buf;
788 	unsigned int buf_len, len = 0;
789 	ssize_t ret_cnt;
790 
791 	buf_len = sizeof(struct htc_endpoint_stats) / sizeof(u32) *
792 		(25 + ENDPOINT_MAX * 11);
793 	buf = kmalloc(buf_len, GFP_KERNEL);
794 	if (!buf)
795 		return -ENOMEM;
796 
797 #define EPSTAT(name)							\
798 	do {								\
799 		len = print_endpoint_stat(target, buf, buf_len, len,	\
800 					  offsetof(struct htc_endpoint_stats, \
801 						   name),		\
802 					  #name);			\
803 	} while (0)
804 
805 	EPSTAT(cred_low_indicate);
806 	EPSTAT(tx_issued);
807 	EPSTAT(tx_pkt_bundled);
808 	EPSTAT(tx_bundles);
809 	EPSTAT(tx_dropped);
810 	EPSTAT(tx_cred_rpt);
811 	EPSTAT(cred_rpt_from_rx);
812 	EPSTAT(cred_rpt_from_other);
813 	EPSTAT(cred_rpt_ep0);
814 	EPSTAT(cred_from_rx);
815 	EPSTAT(cred_from_other);
816 	EPSTAT(cred_from_ep0);
817 	EPSTAT(cred_cosumd);
818 	EPSTAT(cred_retnd);
819 	EPSTAT(rx_pkts);
820 	EPSTAT(rx_lkahds);
821 	EPSTAT(rx_bundl);
822 	EPSTAT(rx_bundle_lkahd);
823 	EPSTAT(rx_bundle_from_hdr);
824 	EPSTAT(rx_alloc_thresh_hit);
825 	EPSTAT(rxalloc_thresh_byte);
826 #undef EPSTAT
827 
828 	if (len > buf_len)
829 		len = buf_len;
830 
831 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
832 	kfree(buf);
833 	return ret_cnt;
834 }
835 
836 static ssize_t ath6kl_endpoint_stats_write(struct file *file,
837 					   const char __user *user_buf,
838 					   size_t count, loff_t *ppos)
839 {
840 	struct ath6kl *ar = file->private_data;
841 	struct htc_target *target = ar->htc_target;
842 	int ret, i;
843 	u32 val;
844 	struct htc_endpoint_stats *ep_st;
845 
846 	ret = kstrtou32_from_user(user_buf, count, 0, &val);
847 	if (ret)
848 		return ret;
849 	if (val == 0) {
850 		for (i = 0; i < ENDPOINT_MAX; i++) {
851 			ep_st = &target->endpoint[i].ep_st;
852 			memset(ep_st, 0, sizeof(*ep_st));
853 		}
854 	}
855 
856 	return count;
857 }
858 
859 static const struct file_operations fops_endpoint_stats = {
860 	.open = simple_open,
861 	.read = ath6kl_endpoint_stats_read,
862 	.write = ath6kl_endpoint_stats_write,
863 	.owner = THIS_MODULE,
864 	.llseek = default_llseek,
865 };
866 
867 static unsigned long ath6kl_get_num_reg(void)
868 {
869 	int i;
870 	unsigned long n_reg = 0;
871 
872 	for (i = 0; i < ARRAY_SIZE(diag_reg); i++)
873 		n_reg = n_reg +
874 		     (diag_reg[i].reg_end - diag_reg[i].reg_start) / 4 + 1;
875 
876 	return n_reg;
877 }
878 
879 static bool ath6kl_dbg_is_diag_reg_valid(u32 reg_addr)
880 {
881 	int i;
882 
883 	for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
884 		if (reg_addr >= diag_reg[i].reg_start &&
885 		    reg_addr <= diag_reg[i].reg_end)
886 			return true;
887 	}
888 
889 	return false;
890 }
891 
892 static ssize_t ath6kl_regread_read(struct file *file, char __user *user_buf,
893 				    size_t count, loff_t *ppos)
894 {
895 	struct ath6kl *ar = file->private_data;
896 	u8 buf[50];
897 	unsigned int len = 0;
898 
899 	if (ar->debug.dbgfs_diag_reg)
900 		len += scnprintf(buf + len, sizeof(buf) - len, "0x%x\n",
901 				ar->debug.dbgfs_diag_reg);
902 	else
903 		len += scnprintf(buf + len, sizeof(buf) - len,
904 				 "All diag registers\n");
905 
906 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
907 }
908 
909 static ssize_t ath6kl_regread_write(struct file *file,
910 				    const char __user *user_buf,
911 				    size_t count, loff_t *ppos)
912 {
913 	struct ath6kl *ar = file->private_data;
914 	unsigned long reg_addr;
915 
916 	if (kstrtoul_from_user(user_buf, count, 0, &reg_addr))
917 		return -EINVAL;
918 
919 	if ((reg_addr % 4) != 0)
920 		return -EINVAL;
921 
922 	if (reg_addr && !ath6kl_dbg_is_diag_reg_valid(reg_addr))
923 		return -EINVAL;
924 
925 	ar->debug.dbgfs_diag_reg = reg_addr;
926 
927 	return count;
928 }
929 
930 static const struct file_operations fops_diag_reg_read = {
931 	.read = ath6kl_regread_read,
932 	.write = ath6kl_regread_write,
933 	.open = simple_open,
934 	.owner = THIS_MODULE,
935 	.llseek = default_llseek,
936 };
937 
938 static int ath6kl_regdump_open(struct inode *inode, struct file *file)
939 {
940 	struct ath6kl *ar = inode->i_private;
941 	u8 *buf;
942 	unsigned long int reg_len;
943 	unsigned int len = 0, n_reg;
944 	u32 addr;
945 	__le32 reg_val;
946 	int i, status;
947 
948 	/* Dump all the registers if no register is specified */
949 	if (!ar->debug.dbgfs_diag_reg)
950 		n_reg = ath6kl_get_num_reg();
951 	else
952 		n_reg = 1;
953 
954 	reg_len = n_reg * REG_OUTPUT_LEN_PER_LINE;
955 	if (n_reg > 1)
956 		reg_len += REGTYPE_STR_LEN;
957 
958 	buf = vmalloc(reg_len);
959 	if (!buf)
960 		return -ENOMEM;
961 
962 	if (n_reg == 1) {
963 		addr = ar->debug.dbgfs_diag_reg;
964 
965 		status = ath6kl_diag_read32(ar,
966 				TARG_VTOP(ar->target_type, addr),
967 				(u32 *)&reg_val);
968 		if (status)
969 			goto fail_reg_read;
970 
971 		len += scnprintf(buf + len, reg_len - len,
972 				 "0x%06x 0x%08x\n", addr, le32_to_cpu(reg_val));
973 		goto done;
974 	}
975 
976 	for (i = 0; i < ARRAY_SIZE(diag_reg); i++) {
977 		len += scnprintf(buf + len, reg_len - len,
978 				"%s\n", diag_reg[i].reg_info);
979 		for (addr = diag_reg[i].reg_start;
980 		     addr <= diag_reg[i].reg_end; addr += 4) {
981 			status = ath6kl_diag_read32(ar,
982 					TARG_VTOP(ar->target_type, addr),
983 					(u32 *)&reg_val);
984 			if (status)
985 				goto fail_reg_read;
986 
987 			len += scnprintf(buf + len, reg_len - len,
988 					"0x%06x 0x%08x\n",
989 					addr, le32_to_cpu(reg_val));
990 		}
991 	}
992 
993 done:
994 	file->private_data = buf;
995 	return 0;
996 
997 fail_reg_read:
998 	ath6kl_warn("Unable to read memory:%u\n", addr);
999 	vfree(buf);
1000 	return -EIO;
1001 }
1002 
1003 static ssize_t ath6kl_regdump_read(struct file *file, char __user *user_buf,
1004 				  size_t count, loff_t *ppos)
1005 {
1006 	u8 *buf = file->private_data;
1007 	return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
1008 }
1009 
1010 static int ath6kl_regdump_release(struct inode *inode, struct file *file)
1011 {
1012 	vfree(file->private_data);
1013 	return 0;
1014 }
1015 
1016 static const struct file_operations fops_reg_dump = {
1017 	.open = ath6kl_regdump_open,
1018 	.read = ath6kl_regdump_read,
1019 	.release = ath6kl_regdump_release,
1020 	.owner = THIS_MODULE,
1021 	.llseek = default_llseek,
1022 };
1023 
1024 static ssize_t ath6kl_lrssi_roam_write(struct file *file,
1025 				       const char __user *user_buf,
1026 				       size_t count, loff_t *ppos)
1027 {
1028 	struct ath6kl *ar = file->private_data;
1029 	unsigned long lrssi_roam_threshold;
1030 	int ret;
1031 
1032 	if (kstrtoul_from_user(user_buf, count, 0, &lrssi_roam_threshold))
1033 		return -EINVAL;
1034 
1035 	ar->lrssi_roam_threshold = lrssi_roam_threshold;
1036 
1037 	ret = ath6kl_wmi_set_roam_lrssi_cmd(ar->wmi, ar->lrssi_roam_threshold);
1038 
1039 	if (ret)
1040 		return ret;
1041 	return count;
1042 }
1043 
1044 static ssize_t ath6kl_lrssi_roam_read(struct file *file,
1045 				      char __user *user_buf,
1046 				      size_t count, loff_t *ppos)
1047 {
1048 	struct ath6kl *ar = file->private_data;
1049 	char buf[32];
1050 	unsigned int len;
1051 
1052 	len = snprintf(buf, sizeof(buf), "%u\n", ar->lrssi_roam_threshold);
1053 
1054 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
1055 }
1056 
1057 static const struct file_operations fops_lrssi_roam_threshold = {
1058 	.read = ath6kl_lrssi_roam_read,
1059 	.write = ath6kl_lrssi_roam_write,
1060 	.open = simple_open,
1061 	.owner = THIS_MODULE,
1062 	.llseek = default_llseek,
1063 };
1064 
1065 static ssize_t ath6kl_regwrite_read(struct file *file,
1066 				    char __user *user_buf,
1067 				    size_t count, loff_t *ppos)
1068 {
1069 	struct ath6kl *ar = file->private_data;
1070 	u8 buf[32];
1071 	unsigned int len = 0;
1072 
1073 	len = scnprintf(buf, sizeof(buf), "Addr: 0x%x Val: 0x%x\n",
1074 			ar->debug.diag_reg_addr_wr, ar->debug.diag_reg_val_wr);
1075 
1076 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
1077 }
1078 
1079 static ssize_t ath6kl_regwrite_write(struct file *file,
1080 				     const char __user *user_buf,
1081 				     size_t count, loff_t *ppos)
1082 {
1083 	struct ath6kl *ar = file->private_data;
1084 	char buf[32];
1085 	char *sptr, *token;
1086 	unsigned int len = 0;
1087 	u32 reg_addr, reg_val;
1088 
1089 	len = min(count, sizeof(buf) - 1);
1090 	if (copy_from_user(buf, user_buf, len))
1091 		return -EFAULT;
1092 
1093 	buf[len] = '\0';
1094 	sptr = buf;
1095 
1096 	token = strsep(&sptr, "=");
1097 	if (!token)
1098 		return -EINVAL;
1099 
1100 	if (kstrtou32(token, 0, &reg_addr))
1101 		return -EINVAL;
1102 
1103 	if (!ath6kl_dbg_is_diag_reg_valid(reg_addr))
1104 		return -EINVAL;
1105 
1106 	if (kstrtou32(sptr, 0, &reg_val))
1107 		return -EINVAL;
1108 
1109 	ar->debug.diag_reg_addr_wr = reg_addr;
1110 	ar->debug.diag_reg_val_wr = reg_val;
1111 
1112 	if (ath6kl_diag_write32(ar, ar->debug.diag_reg_addr_wr,
1113 				cpu_to_le32(ar->debug.diag_reg_val_wr)))
1114 		return -EIO;
1115 
1116 	return count;
1117 }
1118 
1119 static const struct file_operations fops_diag_reg_write = {
1120 	.read = ath6kl_regwrite_read,
1121 	.write = ath6kl_regwrite_write,
1122 	.open = simple_open,
1123 	.owner = THIS_MODULE,
1124 	.llseek = default_llseek,
1125 };
1126 
1127 int ath6kl_debug_roam_tbl_event(struct ath6kl *ar, const void *buf,
1128 				size_t len)
1129 {
1130 	const struct wmi_target_roam_tbl *tbl;
1131 	u16 num_entries;
1132 
1133 	if (len < sizeof(*tbl))
1134 		return -EINVAL;
1135 
1136 	tbl = (const struct wmi_target_roam_tbl *) buf;
1137 	num_entries = le16_to_cpu(tbl->num_entries);
1138 	if (struct_size(tbl, info, num_entries) > len)
1139 		return -EINVAL;
1140 
1141 	if (ar->debug.roam_tbl == NULL ||
1142 	    ar->debug.roam_tbl_len < (unsigned int) len) {
1143 		kfree(ar->debug.roam_tbl);
1144 		ar->debug.roam_tbl = kmalloc(len, GFP_ATOMIC);
1145 		if (ar->debug.roam_tbl == NULL)
1146 			return -ENOMEM;
1147 	}
1148 
1149 	memcpy(ar->debug.roam_tbl, buf, len);
1150 	ar->debug.roam_tbl_len = len;
1151 
1152 	if (test_bit(ROAM_TBL_PEND, &ar->flag)) {
1153 		clear_bit(ROAM_TBL_PEND, &ar->flag);
1154 		wake_up(&ar->event_wq);
1155 	}
1156 
1157 	return 0;
1158 }
1159 
1160 static ssize_t ath6kl_roam_table_read(struct file *file, char __user *user_buf,
1161 				      size_t count, loff_t *ppos)
1162 {
1163 	struct ath6kl *ar = file->private_data;
1164 	int ret;
1165 	long left;
1166 	struct wmi_target_roam_tbl *tbl;
1167 	u16 num_entries, i;
1168 	char *buf;
1169 	unsigned int len, buf_len;
1170 	ssize_t ret_cnt;
1171 
1172 	if (down_interruptible(&ar->sem))
1173 		return -EBUSY;
1174 
1175 	set_bit(ROAM_TBL_PEND, &ar->flag);
1176 
1177 	ret = ath6kl_wmi_get_roam_tbl_cmd(ar->wmi);
1178 	if (ret) {
1179 		up(&ar->sem);
1180 		return ret;
1181 	}
1182 
1183 	left = wait_event_interruptible_timeout(
1184 		ar->event_wq, !test_bit(ROAM_TBL_PEND, &ar->flag), WMI_TIMEOUT);
1185 	up(&ar->sem);
1186 
1187 	if (left <= 0)
1188 		return -ETIMEDOUT;
1189 
1190 	if (ar->debug.roam_tbl == NULL)
1191 		return -ENOMEM;
1192 
1193 	tbl = (struct wmi_target_roam_tbl *) ar->debug.roam_tbl;
1194 	num_entries = le16_to_cpu(tbl->num_entries);
1195 
1196 	buf_len = 100 + num_entries * 100;
1197 	buf = kzalloc(buf_len, GFP_KERNEL);
1198 	if (buf == NULL)
1199 		return -ENOMEM;
1200 	len = 0;
1201 	len += scnprintf(buf + len, buf_len - len,
1202 			 "roam_mode=%u\n\n"
1203 			 "# roam_util bssid rssi rssidt last_rssi util bias\n",
1204 			 le16_to_cpu(tbl->roam_mode));
1205 
1206 	for (i = 0; i < num_entries; i++) {
1207 		struct wmi_bss_roam_info *info = &tbl->info[i];
1208 		len += scnprintf(buf + len, buf_len - len,
1209 				 "%d %pM %d %d %d %d %d\n",
1210 				 a_sle32_to_cpu(info->roam_util), info->bssid,
1211 				 info->rssi, info->rssidt, info->last_rssi,
1212 				 info->util, info->bias);
1213 	}
1214 
1215 	if (len > buf_len)
1216 		len = buf_len;
1217 
1218 	ret_cnt = simple_read_from_buffer(user_buf, count, ppos, buf, len);
1219 
1220 	kfree(buf);
1221 	return ret_cnt;
1222 }
1223 
1224 static const struct file_operations fops_roam_table = {
1225 	.read = ath6kl_roam_table_read,
1226 	.open = simple_open,
1227 	.owner = THIS_MODULE,
1228 	.llseek = default_llseek,
1229 };
1230 
1231 static ssize_t ath6kl_force_roam_write(struct file *file,
1232 				       const char __user *user_buf,
1233 				       size_t count, loff_t *ppos)
1234 {
1235 	struct ath6kl *ar = file->private_data;
1236 	int ret;
1237 	char buf[20];
1238 	size_t len;
1239 	u8 bssid[ETH_ALEN];
1240 
1241 	len = min(count, sizeof(buf) - 1);
1242 	if (copy_from_user(buf, user_buf, len))
1243 		return -EFAULT;
1244 	buf[len] = '\0';
1245 
1246 	if (!mac_pton(buf, bssid))
1247 		return -EINVAL;
1248 
1249 	ret = ath6kl_wmi_force_roam_cmd(ar->wmi, bssid);
1250 	if (ret)
1251 		return ret;
1252 
1253 	return count;
1254 }
1255 
1256 static const struct file_operations fops_force_roam = {
1257 	.write = ath6kl_force_roam_write,
1258 	.open = simple_open,
1259 	.owner = THIS_MODULE,
1260 	.llseek = default_llseek,
1261 };
1262 
1263 static ssize_t ath6kl_roam_mode_write(struct file *file,
1264 				      const char __user *user_buf,
1265 				      size_t count, loff_t *ppos)
1266 {
1267 	struct ath6kl *ar = file->private_data;
1268 	int ret;
1269 	char buf[20];
1270 	size_t len;
1271 	enum wmi_roam_mode mode;
1272 
1273 	len = min(count, sizeof(buf) - 1);
1274 	if (copy_from_user(buf, user_buf, len))
1275 		return -EFAULT;
1276 	buf[len] = '\0';
1277 	if (len > 0 && buf[len - 1] == '\n')
1278 		buf[len - 1] = '\0';
1279 
1280 	if (strcasecmp(buf, "default") == 0)
1281 		mode = WMI_DEFAULT_ROAM_MODE;
1282 	else if (strcasecmp(buf, "bssbias") == 0)
1283 		mode = WMI_HOST_BIAS_ROAM_MODE;
1284 	else if (strcasecmp(buf, "lock") == 0)
1285 		mode = WMI_LOCK_BSS_MODE;
1286 	else
1287 		return -EINVAL;
1288 
1289 	ret = ath6kl_wmi_set_roam_mode_cmd(ar->wmi, mode);
1290 	if (ret)
1291 		return ret;
1292 
1293 	return count;
1294 }
1295 
1296 static const struct file_operations fops_roam_mode = {
1297 	.write = ath6kl_roam_mode_write,
1298 	.open = simple_open,
1299 	.owner = THIS_MODULE,
1300 	.llseek = default_llseek,
1301 };
1302 
1303 void ath6kl_debug_set_keepalive(struct ath6kl *ar, u8 keepalive)
1304 {
1305 	ar->debug.keepalive = keepalive;
1306 }
1307 
1308 static ssize_t ath6kl_keepalive_read(struct file *file, char __user *user_buf,
1309 				     size_t count, loff_t *ppos)
1310 {
1311 	struct ath6kl *ar = file->private_data;
1312 	char buf[16];
1313 	int len;
1314 
1315 	len = snprintf(buf, sizeof(buf), "%u\n", ar->debug.keepalive);
1316 
1317 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
1318 }
1319 
1320 static ssize_t ath6kl_keepalive_write(struct file *file,
1321 				      const char __user *user_buf,
1322 				      size_t count, loff_t *ppos)
1323 {
1324 	struct ath6kl *ar = file->private_data;
1325 	int ret;
1326 	u8 val;
1327 
1328 	ret = kstrtou8_from_user(user_buf, count, 0, &val);
1329 	if (ret)
1330 		return ret;
1331 
1332 	ret = ath6kl_wmi_set_keepalive_cmd(ar->wmi, 0, val);
1333 	if (ret)
1334 		return ret;
1335 
1336 	return count;
1337 }
1338 
1339 static const struct file_operations fops_keepalive = {
1340 	.open = simple_open,
1341 	.read = ath6kl_keepalive_read,
1342 	.write = ath6kl_keepalive_write,
1343 	.owner = THIS_MODULE,
1344 	.llseek = default_llseek,
1345 };
1346 
1347 void ath6kl_debug_set_disconnect_timeout(struct ath6kl *ar, u8 timeout)
1348 {
1349 	ar->debug.disc_timeout = timeout;
1350 }
1351 
1352 static ssize_t ath6kl_disconnect_timeout_read(struct file *file,
1353 					      char __user *user_buf,
1354 					      size_t count, loff_t *ppos)
1355 {
1356 	struct ath6kl *ar = file->private_data;
1357 	char buf[16];
1358 	int len;
1359 
1360 	len = snprintf(buf, sizeof(buf), "%u\n", ar->debug.disc_timeout);
1361 
1362 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
1363 }
1364 
1365 static ssize_t ath6kl_disconnect_timeout_write(struct file *file,
1366 					       const char __user *user_buf,
1367 					       size_t count, loff_t *ppos)
1368 {
1369 	struct ath6kl *ar = file->private_data;
1370 	int ret;
1371 	u8 val;
1372 
1373 	ret = kstrtou8_from_user(user_buf, count, 0, &val);
1374 	if (ret)
1375 		return ret;
1376 
1377 	ret = ath6kl_wmi_disctimeout_cmd(ar->wmi, 0, val);
1378 	if (ret)
1379 		return ret;
1380 
1381 	return count;
1382 }
1383 
1384 static const struct file_operations fops_disconnect_timeout = {
1385 	.open = simple_open,
1386 	.read = ath6kl_disconnect_timeout_read,
1387 	.write = ath6kl_disconnect_timeout_write,
1388 	.owner = THIS_MODULE,
1389 	.llseek = default_llseek,
1390 };
1391 
1392 static ssize_t ath6kl_create_qos_write(struct file *file,
1393 						const char __user *user_buf,
1394 						size_t count, loff_t *ppos)
1395 {
1396 	struct ath6kl *ar = file->private_data;
1397 	struct ath6kl_vif *vif;
1398 	char buf[200];
1399 	ssize_t len;
1400 	char *sptr, *token;
1401 	struct wmi_create_pstream_cmd pstream;
1402 	u32 val32;
1403 	u16 val16;
1404 
1405 	vif = ath6kl_vif_first(ar);
1406 	if (!vif)
1407 		return -EIO;
1408 
1409 	len = min(count, sizeof(buf) - 1);
1410 	if (copy_from_user(buf, user_buf, len))
1411 		return -EFAULT;
1412 	buf[len] = '\0';
1413 	sptr = buf;
1414 
1415 	token = strsep(&sptr, " ");
1416 	if (!token)
1417 		return -EINVAL;
1418 	if (kstrtou8(token, 0, &pstream.user_pri))
1419 		return -EINVAL;
1420 
1421 	token = strsep(&sptr, " ");
1422 	if (!token)
1423 		return -EINVAL;
1424 	if (kstrtou8(token, 0, &pstream.traffic_direc))
1425 		return -EINVAL;
1426 
1427 	token = strsep(&sptr, " ");
1428 	if (!token)
1429 		return -EINVAL;
1430 	if (kstrtou8(token, 0, &pstream.traffic_class))
1431 		return -EINVAL;
1432 
1433 	token = strsep(&sptr, " ");
1434 	if (!token)
1435 		return -EINVAL;
1436 	if (kstrtou8(token, 0, &pstream.traffic_type))
1437 		return -EINVAL;
1438 
1439 	token = strsep(&sptr, " ");
1440 	if (!token)
1441 		return -EINVAL;
1442 	if (kstrtou8(token, 0, &pstream.voice_psc_cap))
1443 		return -EINVAL;
1444 
1445 	token = strsep(&sptr, " ");
1446 	if (!token)
1447 		return -EINVAL;
1448 	if (kstrtou32(token, 0, &val32))
1449 		return -EINVAL;
1450 	pstream.min_service_int = cpu_to_le32(val32);
1451 
1452 	token = strsep(&sptr, " ");
1453 	if (!token)
1454 		return -EINVAL;
1455 	if (kstrtou32(token, 0, &val32))
1456 		return -EINVAL;
1457 	pstream.max_service_int = cpu_to_le32(val32);
1458 
1459 	token = strsep(&sptr, " ");
1460 	if (!token)
1461 		return -EINVAL;
1462 	if (kstrtou32(token, 0, &val32))
1463 		return -EINVAL;
1464 	pstream.inactivity_int = cpu_to_le32(val32);
1465 
1466 	token = strsep(&sptr, " ");
1467 	if (!token)
1468 		return -EINVAL;
1469 	if (kstrtou32(token, 0, &val32))
1470 		return -EINVAL;
1471 	pstream.suspension_int = cpu_to_le32(val32);
1472 
1473 	token = strsep(&sptr, " ");
1474 	if (!token)
1475 		return -EINVAL;
1476 	if (kstrtou32(token, 0, &val32))
1477 		return -EINVAL;
1478 	pstream.service_start_time = cpu_to_le32(val32);
1479 
1480 	token = strsep(&sptr, " ");
1481 	if (!token)
1482 		return -EINVAL;
1483 	if (kstrtou8(token, 0, &pstream.tsid))
1484 		return -EINVAL;
1485 
1486 	token = strsep(&sptr, " ");
1487 	if (!token)
1488 		return -EINVAL;
1489 	if (kstrtou16(token, 0, &val16))
1490 		return -EINVAL;
1491 	pstream.nominal_msdu = cpu_to_le16(val16);
1492 
1493 	token = strsep(&sptr, " ");
1494 	if (!token)
1495 		return -EINVAL;
1496 	if (kstrtou16(token, 0, &val16))
1497 		return -EINVAL;
1498 	pstream.max_msdu = cpu_to_le16(val16);
1499 
1500 	token = strsep(&sptr, " ");
1501 	if (!token)
1502 		return -EINVAL;
1503 	if (kstrtou32(token, 0, &val32))
1504 		return -EINVAL;
1505 	pstream.min_data_rate = cpu_to_le32(val32);
1506 
1507 	token = strsep(&sptr, " ");
1508 	if (!token)
1509 		return -EINVAL;
1510 	if (kstrtou32(token, 0, &val32))
1511 		return -EINVAL;
1512 	pstream.mean_data_rate = cpu_to_le32(val32);
1513 
1514 	token = strsep(&sptr, " ");
1515 	if (!token)
1516 		return -EINVAL;
1517 	if (kstrtou32(token, 0, &val32))
1518 		return -EINVAL;
1519 	pstream.peak_data_rate = cpu_to_le32(val32);
1520 
1521 	token = strsep(&sptr, " ");
1522 	if (!token)
1523 		return -EINVAL;
1524 	if (kstrtou32(token, 0, &val32))
1525 		return -EINVAL;
1526 	pstream.max_burst_size = cpu_to_le32(val32);
1527 
1528 	token = strsep(&sptr, " ");
1529 	if (!token)
1530 		return -EINVAL;
1531 	if (kstrtou32(token, 0, &val32))
1532 		return -EINVAL;
1533 	pstream.delay_bound = cpu_to_le32(val32);
1534 
1535 	token = strsep(&sptr, " ");
1536 	if (!token)
1537 		return -EINVAL;
1538 	if (kstrtou32(token, 0, &val32))
1539 		return -EINVAL;
1540 	pstream.min_phy_rate = cpu_to_le32(val32);
1541 
1542 	token = strsep(&sptr, " ");
1543 	if (!token)
1544 		return -EINVAL;
1545 	if (kstrtou32(token, 0, &val32))
1546 		return -EINVAL;
1547 	pstream.sba = cpu_to_le32(val32);
1548 
1549 	token = strsep(&sptr, " ");
1550 	if (!token)
1551 		return -EINVAL;
1552 	if (kstrtou32(token, 0, &val32))
1553 		return -EINVAL;
1554 	pstream.medium_time = cpu_to_le32(val32);
1555 
1556 	pstream.nominal_phy = le32_to_cpu(pstream.min_phy_rate) / 1000000;
1557 
1558 	ath6kl_wmi_create_pstream_cmd(ar->wmi, vif->fw_vif_idx, &pstream);
1559 
1560 	return count;
1561 }
1562 
1563 static const struct file_operations fops_create_qos = {
1564 	.write = ath6kl_create_qos_write,
1565 	.open = simple_open,
1566 	.owner = THIS_MODULE,
1567 	.llseek = default_llseek,
1568 };
1569 
1570 static ssize_t ath6kl_delete_qos_write(struct file *file,
1571 				const char __user *user_buf,
1572 				size_t count, loff_t *ppos)
1573 {
1574 	struct ath6kl *ar = file->private_data;
1575 	struct ath6kl_vif *vif;
1576 	char buf[100];
1577 	ssize_t len;
1578 	char *sptr, *token;
1579 	u8 traffic_class;
1580 	u8 tsid;
1581 
1582 	vif = ath6kl_vif_first(ar);
1583 	if (!vif)
1584 		return -EIO;
1585 
1586 	len = min(count, sizeof(buf) - 1);
1587 	if (copy_from_user(buf, user_buf, len))
1588 		return -EFAULT;
1589 	buf[len] = '\0';
1590 	sptr = buf;
1591 
1592 	token = strsep(&sptr, " ");
1593 	if (!token)
1594 		return -EINVAL;
1595 	if (kstrtou8(token, 0, &traffic_class))
1596 		return -EINVAL;
1597 
1598 	token = strsep(&sptr, " ");
1599 	if (!token)
1600 		return -EINVAL;
1601 	if (kstrtou8(token, 0, &tsid))
1602 		return -EINVAL;
1603 
1604 	ath6kl_wmi_delete_pstream_cmd(ar->wmi, vif->fw_vif_idx,
1605 				      traffic_class, tsid);
1606 
1607 	return count;
1608 }
1609 
1610 static const struct file_operations fops_delete_qos = {
1611 	.write = ath6kl_delete_qos_write,
1612 	.open = simple_open,
1613 	.owner = THIS_MODULE,
1614 	.llseek = default_llseek,
1615 };
1616 
1617 static ssize_t ath6kl_bgscan_int_write(struct file *file,
1618 				const char __user *user_buf,
1619 				size_t count, loff_t *ppos)
1620 {
1621 	struct ath6kl *ar = file->private_data;
1622 	struct ath6kl_vif *vif;
1623 	u16 bgscan_int;
1624 	char buf[32];
1625 	ssize_t len;
1626 
1627 	vif = ath6kl_vif_first(ar);
1628 	if (!vif)
1629 		return -EIO;
1630 
1631 	len = min(count, sizeof(buf) - 1);
1632 	if (copy_from_user(buf, user_buf, len))
1633 		return -EFAULT;
1634 
1635 	buf[len] = '\0';
1636 	if (kstrtou16(buf, 0, &bgscan_int))
1637 		return -EINVAL;
1638 
1639 	if (bgscan_int == 0)
1640 		bgscan_int = 0xffff;
1641 
1642 	vif->bg_scan_period = bgscan_int;
1643 
1644 	ath6kl_wmi_scanparams_cmd(ar->wmi, 0, 0, 0, bgscan_int, 0, 0, 0, 3,
1645 				  0, 0, 0);
1646 
1647 	return count;
1648 }
1649 
1650 static const struct file_operations fops_bgscan_int = {
1651 	.write = ath6kl_bgscan_int_write,
1652 	.open = simple_open,
1653 	.owner = THIS_MODULE,
1654 	.llseek = default_llseek,
1655 };
1656 
1657 static ssize_t ath6kl_listen_int_write(struct file *file,
1658 				       const char __user *user_buf,
1659 				       size_t count, loff_t *ppos)
1660 {
1661 	struct ath6kl *ar = file->private_data;
1662 	struct ath6kl_vif *vif;
1663 	u16 listen_interval;
1664 	char buf[32];
1665 	ssize_t len;
1666 
1667 	vif = ath6kl_vif_first(ar);
1668 	if (!vif)
1669 		return -EIO;
1670 
1671 	len = min(count, sizeof(buf) - 1);
1672 	if (copy_from_user(buf, user_buf, len))
1673 		return -EFAULT;
1674 
1675 	buf[len] = '\0';
1676 	if (kstrtou16(buf, 0, &listen_interval))
1677 		return -EINVAL;
1678 
1679 	if ((listen_interval < 15) || (listen_interval > 3000))
1680 		return -EINVAL;
1681 
1682 	vif->listen_intvl_t = listen_interval;
1683 	ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx,
1684 				      vif->listen_intvl_t, 0);
1685 
1686 	return count;
1687 }
1688 
1689 static ssize_t ath6kl_listen_int_read(struct file *file,
1690 				      char __user *user_buf,
1691 				      size_t count, loff_t *ppos)
1692 {
1693 	struct ath6kl *ar = file->private_data;
1694 	struct ath6kl_vif *vif;
1695 	char buf[32];
1696 	int len;
1697 
1698 	vif = ath6kl_vif_first(ar);
1699 	if (!vif)
1700 		return -EIO;
1701 
1702 	len = scnprintf(buf, sizeof(buf), "%u\n", vif->listen_intvl_t);
1703 
1704 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
1705 }
1706 
1707 static const struct file_operations fops_listen_int = {
1708 	.read = ath6kl_listen_int_read,
1709 	.write = ath6kl_listen_int_write,
1710 	.open = simple_open,
1711 	.owner = THIS_MODULE,
1712 	.llseek = default_llseek,
1713 };
1714 
1715 static ssize_t ath6kl_power_params_write(struct file *file,
1716 						const char __user *user_buf,
1717 						size_t count, loff_t *ppos)
1718 {
1719 	struct ath6kl *ar = file->private_data;
1720 	u8 buf[100];
1721 	unsigned int len = 0;
1722 	char *sptr, *token;
1723 	u16 idle_period, ps_poll_num, dtim,
1724 		tx_wakeup, num_tx;
1725 
1726 	len = min(count, sizeof(buf) - 1);
1727 	if (copy_from_user(buf, user_buf, len))
1728 		return -EFAULT;
1729 	buf[len] = '\0';
1730 	sptr = buf;
1731 
1732 	token = strsep(&sptr, " ");
1733 	if (!token)
1734 		return -EINVAL;
1735 	if (kstrtou16(token, 0, &idle_period))
1736 		return -EINVAL;
1737 
1738 	token = strsep(&sptr, " ");
1739 	if (!token)
1740 		return -EINVAL;
1741 	if (kstrtou16(token, 0, &ps_poll_num))
1742 		return -EINVAL;
1743 
1744 	token = strsep(&sptr, " ");
1745 	if (!token)
1746 		return -EINVAL;
1747 	if (kstrtou16(token, 0, &dtim))
1748 		return -EINVAL;
1749 
1750 	token = strsep(&sptr, " ");
1751 	if (!token)
1752 		return -EINVAL;
1753 	if (kstrtou16(token, 0, &tx_wakeup))
1754 		return -EINVAL;
1755 
1756 	token = strsep(&sptr, " ");
1757 	if (!token)
1758 		return -EINVAL;
1759 	if (kstrtou16(token, 0, &num_tx))
1760 		return -EINVAL;
1761 
1762 	ath6kl_wmi_pmparams_cmd(ar->wmi, 0, idle_period, ps_poll_num,
1763 				dtim, tx_wakeup, num_tx, 0);
1764 
1765 	return count;
1766 }
1767 
1768 static const struct file_operations fops_power_params = {
1769 	.write = ath6kl_power_params_write,
1770 	.open = simple_open,
1771 	.owner = THIS_MODULE,
1772 	.llseek = default_llseek,
1773 };
1774 
1775 void ath6kl_debug_init(struct ath6kl *ar)
1776 {
1777 	skb_queue_head_init(&ar->debug.fwlog_queue);
1778 	init_completion(&ar->debug.fwlog_completion);
1779 
1780 	/*
1781 	 * Actually we are lying here but don't know how to read the mask
1782 	 * value from the firmware.
1783 	 */
1784 	ar->debug.fwlog_mask = 0;
1785 }
1786 
1787 /*
1788  * Initialisation needs to happen in two stages as fwlog events can come
1789  * before cfg80211 is initialised, and debugfs depends on cfg80211
1790  * initialisation.
1791  */
1792 int ath6kl_debug_init_fs(struct ath6kl *ar)
1793 {
1794 	ar->debugfs_phy = debugfs_create_dir("ath6kl",
1795 					     ar->wiphy->debugfsdir);
1796 	if (!ar->debugfs_phy)
1797 		return -ENOMEM;
1798 
1799 	debugfs_create_file("tgt_stats", 0400, ar->debugfs_phy, ar,
1800 			    &fops_tgt_stats);
1801 
1802 	if (ar->hif_type == ATH6KL_HIF_TYPE_SDIO)
1803 		debugfs_create_file("credit_dist_stats", 0400,
1804 				    ar->debugfs_phy, ar,
1805 				    &fops_credit_dist_stats);
1806 
1807 	debugfs_create_file("endpoint_stats", 0600,
1808 			    ar->debugfs_phy, ar, &fops_endpoint_stats);
1809 
1810 	debugfs_create_file("fwlog", 0400, ar->debugfs_phy, ar, &fops_fwlog);
1811 
1812 	debugfs_create_file("fwlog_block", 0400, ar->debugfs_phy, ar,
1813 			    &fops_fwlog_block);
1814 
1815 	debugfs_create_file("fwlog_mask", 0600, ar->debugfs_phy,
1816 			    ar, &fops_fwlog_mask);
1817 
1818 	debugfs_create_file("reg_addr", 0600, ar->debugfs_phy, ar,
1819 			    &fops_diag_reg_read);
1820 
1821 	debugfs_create_file("reg_dump", 0400, ar->debugfs_phy, ar,
1822 			    &fops_reg_dump);
1823 
1824 	debugfs_create_file("lrssi_roam_threshold", 0600,
1825 			    ar->debugfs_phy, ar, &fops_lrssi_roam_threshold);
1826 
1827 	debugfs_create_file("reg_write", 0600,
1828 			    ar->debugfs_phy, ar, &fops_diag_reg_write);
1829 
1830 	debugfs_create_file("war_stats", 0400, ar->debugfs_phy, ar,
1831 			    &fops_war_stats);
1832 
1833 	debugfs_create_file("roam_table", 0400, ar->debugfs_phy, ar,
1834 			    &fops_roam_table);
1835 
1836 	debugfs_create_file("force_roam", 0200, ar->debugfs_phy, ar,
1837 			    &fops_force_roam);
1838 
1839 	debugfs_create_file("roam_mode", 0200, ar->debugfs_phy, ar,
1840 			    &fops_roam_mode);
1841 
1842 	debugfs_create_file("keepalive", 0600, ar->debugfs_phy, ar,
1843 			    &fops_keepalive);
1844 
1845 	debugfs_create_file("disconnect_timeout", 0600,
1846 			    ar->debugfs_phy, ar, &fops_disconnect_timeout);
1847 
1848 	debugfs_create_file("create_qos", 0200, ar->debugfs_phy, ar,
1849 			    &fops_create_qos);
1850 
1851 	debugfs_create_file("delete_qos", 0200, ar->debugfs_phy, ar,
1852 			    &fops_delete_qos);
1853 
1854 	debugfs_create_file("bgscan_interval", 0200,
1855 			    ar->debugfs_phy, ar, &fops_bgscan_int);
1856 
1857 	debugfs_create_file("listen_interval", 0600,
1858 			    ar->debugfs_phy, ar, &fops_listen_int);
1859 
1860 	debugfs_create_file("power_params", 0200, ar->debugfs_phy, ar,
1861 			    &fops_power_params);
1862 
1863 	return 0;
1864 }
1865 
1866 void ath6kl_debug_cleanup(struct ath6kl *ar)
1867 {
1868 	skb_queue_purge(&ar->debug.fwlog_queue);
1869 	complete(&ar->debug.fwlog_completion);
1870 	kfree(ar->debug.roam_tbl);
1871 }
1872 
1873 #endif
1874