1 /*
2  * Marvell Wireless LAN device driver: debugfs
3  *
4  * Copyright (C) 2011-2014, Marvell International Ltd.
5  *
6  * This software file (the "File") is distributed by Marvell International
7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8  * (the "License").  You may use, redistribute and/or modify this File in
9  * accordance with the terms and conditions of the License, a copy of which
10  * is available by writing to the Free Software Foundation, Inc.,
11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  *
14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
17  * this warranty disclaimer.
18  */
19 
20 #include <linux/debugfs.h>
21 
22 #include "main.h"
23 #include "11n.h"
24 
25 
26 static struct dentry *mwifiex_dfs_dir;
27 
28 static char *bss_modes[] = {
29 	"UNSPECIFIED",
30 	"ADHOC",
31 	"STATION",
32 	"AP",
33 	"AP_VLAN",
34 	"WDS",
35 	"MONITOR",
36 	"MESH_POINT",
37 	"P2P_CLIENT",
38 	"P2P_GO",
39 	"P2P_DEVICE",
40 };
41 
42 /*
43  * Proc info file read handler.
44  *
45  * This function is called when the 'info' file is opened for reading.
46  * It prints the following driver related information -
47  *      - Driver name
48  *      - Driver version
49  *      - Driver extended version
50  *      - Interface name
51  *      - BSS mode
52  *      - Media state (connected or disconnected)
53  *      - MAC address
54  *      - Total number of Tx bytes
55  *      - Total number of Rx bytes
56  *      - Total number of Tx packets
57  *      - Total number of Rx packets
58  *      - Total number of dropped Tx packets
59  *      - Total number of dropped Rx packets
60  *      - Total number of corrupted Tx packets
61  *      - Total number of corrupted Rx packets
62  *      - Carrier status (on or off)
63  *      - Tx queue status (started or stopped)
64  *
65  * For STA mode drivers, it also prints the following extra -
66  *      - ESSID
67  *      - BSSID
68  *      - Channel
69  *      - Region code
70  *      - Multicast count
71  *      - Multicast addresses
72  */
73 static ssize_t
74 mwifiex_info_read(struct file *file, char __user *ubuf,
75 		  size_t count, loff_t *ppos)
76 {
77 	struct mwifiex_private *priv =
78 		(struct mwifiex_private *) file->private_data;
79 	struct net_device *netdev = priv->netdev;
80 	struct netdev_hw_addr *ha;
81 	struct netdev_queue *txq;
82 	unsigned long page = get_zeroed_page(GFP_KERNEL);
83 	char *p = (char *) page, fmt[64];
84 	struct mwifiex_bss_info info;
85 	ssize_t ret;
86 	int i = 0;
87 
88 	if (!p)
89 		return -ENOMEM;
90 
91 	memset(&info, 0, sizeof(info));
92 	ret = mwifiex_get_bss_info(priv, &info);
93 	if (ret)
94 		goto free_and_exit;
95 
96 	mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);
97 
98 	mwifiex_get_ver_ext(priv, 0);
99 
100 	p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
101 	p += sprintf(p, "driver_version = %s", fmt);
102 	p += sprintf(p, "\nverext = %s", priv->version_str);
103 	p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);
104 
105 	if (info.bss_mode >= ARRAY_SIZE(bss_modes))
106 		p += sprintf(p, "bss_mode=\"%d\"\n", info.bss_mode);
107 	else
108 		p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);
109 
110 	p += sprintf(p, "media_state=\"%s\"\n",
111 		     (!priv->media_connected ? "Disconnected" : "Connected"));
112 	p += sprintf(p, "mac_address=\"%pM\"\n", netdev->dev_addr);
113 
114 	if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
115 		p += sprintf(p, "multicast_count=\"%d\"\n",
116 			     netdev_mc_count(netdev));
117 		p += sprintf(p, "essid=\"%.*s\"\n", info.ssid.ssid_len,
118 			     info.ssid.ssid);
119 		p += sprintf(p, "bssid=\"%pM\"\n", info.bssid);
120 		p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
121 		p += sprintf(p, "country_code = \"%s\"\n", info.country_code);
122 		p += sprintf(p, "region_code=\"0x%x\"\n",
123 			     priv->adapter->region_code);
124 
125 		netdev_for_each_mc_addr(ha, netdev)
126 			p += sprintf(p, "multicast_address[%d]=\"%pM\"\n",
127 					i++, ha->addr);
128 	}
129 
130 	p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
131 	p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
132 	p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
133 	p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
134 	p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
135 	p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
136 	p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
137 	p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
138 	p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
139 					 ? "on" : "off"));
140 	p += sprintf(p, "tx queue");
141 	for (i = 0; i < netdev->num_tx_queues; i++) {
142 		txq = netdev_get_tx_queue(netdev, i);
143 		p += sprintf(p, " %d:%s", i, netif_tx_queue_stopped(txq) ?
144 			     "stopped" : "started");
145 	}
146 	p += sprintf(p, "\n");
147 
148 	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
149 				      (unsigned long) p - page);
150 
151 free_and_exit:
152 	free_page(page);
153 	return ret;
154 }
155 
156 /*
157  * Proc getlog file read handler.
158  *
159  * This function is called when the 'getlog' file is opened for reading
160  * It prints the following log information -
161  *      - Number of multicast Tx frames
162  *      - Number of failed packets
163  *      - Number of Tx retries
164  *      - Number of multicast Tx retries
165  *      - Number of duplicate frames
166  *      - Number of RTS successes
167  *      - Number of RTS failures
168  *      - Number of ACK failures
169  *      - Number of fragmented Rx frames
170  *      - Number of multicast Rx frames
171  *      - Number of FCS errors
172  *      - Number of Tx frames
173  *      - WEP ICV error counts
174  *      - Number of received beacons
175  *      - Number of missed beacons
176  */
177 static ssize_t
178 mwifiex_getlog_read(struct file *file, char __user *ubuf,
179 		    size_t count, loff_t *ppos)
180 {
181 	struct mwifiex_private *priv =
182 		(struct mwifiex_private *) file->private_data;
183 	unsigned long page = get_zeroed_page(GFP_KERNEL);
184 	char *p = (char *) page;
185 	ssize_t ret;
186 	struct mwifiex_ds_get_stats stats;
187 
188 	if (!p)
189 		return -ENOMEM;
190 
191 	memset(&stats, 0, sizeof(stats));
192 	ret = mwifiex_get_stats_info(priv, &stats);
193 	if (ret)
194 		goto free_and_exit;
195 
196 	p += sprintf(p, "\n"
197 		     "mcasttxframe     %u\n"
198 		     "failed           %u\n"
199 		     "retry            %u\n"
200 		     "multiretry       %u\n"
201 		     "framedup         %u\n"
202 		     "rtssuccess       %u\n"
203 		     "rtsfailure       %u\n"
204 		     "ackfailure       %u\n"
205 		     "rxfrag           %u\n"
206 		     "mcastrxframe     %u\n"
207 		     "fcserror         %u\n"
208 		     "txframe          %u\n"
209 		     "wepicverrcnt-1   %u\n"
210 		     "wepicverrcnt-2   %u\n"
211 		     "wepicverrcnt-3   %u\n"
212 		     "wepicverrcnt-4   %u\n"
213 		     "bcn_rcv_cnt   %u\n"
214 		     "bcn_miss_cnt   %u\n",
215 		     stats.mcast_tx_frame,
216 		     stats.failed,
217 		     stats.retry,
218 		     stats.multi_retry,
219 		     stats.frame_dup,
220 		     stats.rts_success,
221 		     stats.rts_failure,
222 		     stats.ack_failure,
223 		     stats.rx_frag,
224 		     stats.mcast_rx_frame,
225 		     stats.fcs_error,
226 		     stats.tx_frame,
227 		     stats.wep_icv_error[0],
228 		     stats.wep_icv_error[1],
229 		     stats.wep_icv_error[2],
230 		     stats.wep_icv_error[3],
231 		     stats.bcn_rcv_cnt,
232 		     stats.bcn_miss_cnt);
233 
234 
235 	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
236 				      (unsigned long) p - page);
237 
238 free_and_exit:
239 	free_page(page);
240 	return ret;
241 }
242 
243 /* Sysfs histogram file read handler.
244  *
245  * This function is called when the 'histogram' file is opened for reading
246  * It prints the following histogram information -
247  *      - Number of histogram samples
248  *      - Receive packet number of each rx_rate
249  *      - Receive packet number of each snr
250  *      - Receive packet number of each nosie_flr
251  *      - Receive packet number of each signal streath
252  */
253 static ssize_t
254 mwifiex_histogram_read(struct file *file, char __user *ubuf,
255 		       size_t count, loff_t *ppos)
256 {
257 	struct mwifiex_private *priv =
258 		(struct mwifiex_private *)file->private_data;
259 	ssize_t ret;
260 	struct mwifiex_histogram_data *phist_data;
261 	int i, value;
262 	unsigned long page = get_zeroed_page(GFP_KERNEL);
263 	char *p = (char *)page;
264 
265 	if (!p)
266 		return -ENOMEM;
267 
268 	if (!priv || !priv->hist_data)
269 		return -EFAULT;
270 	phist_data = priv->hist_data;
271 
272 	p += sprintf(p, "\n"
273 		     "total samples = %d\n",
274 		     atomic_read(&phist_data->num_samples));
275 
276 	p += sprintf(p,
277 		     "rx rates (in Mbps): 0=1M   1=2M 2=5.5M  3=11M   4=6M   5=9M  6=12M\n"
278 		     "7=18M  8=24M  9=36M  10=48M  11=54M 12-27=MCS0-15(BW20) 28-43=MCS0-15(BW40)\n");
279 
280 	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info)) {
281 		p += sprintf(p,
282 			     "44-53=MCS0-9(VHT:BW20) 54-63=MCS0-9(VHT:BW40) 64-73=MCS0-9(VHT:BW80)\n\n");
283 	} else {
284 		p += sprintf(p, "\n");
285 	}
286 
287 	for (i = 0; i < MWIFIEX_MAX_RX_RATES; i++) {
288 		value = atomic_read(&phist_data->rx_rate[i]);
289 		if (value)
290 			p += sprintf(p, "rx_rate[%02d] = %d\n", i, value);
291 	}
292 
293 	if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info)) {
294 		for (i = MWIFIEX_MAX_RX_RATES; i < MWIFIEX_MAX_AC_RX_RATES;
295 		     i++) {
296 			value = atomic_read(&phist_data->rx_rate[i]);
297 			if (value)
298 				p += sprintf(p, "rx_rate[%02d] = %d\n",
299 					   i, value);
300 		}
301 	}
302 
303 	for (i = 0; i < MWIFIEX_MAX_SNR; i++) {
304 		value =  atomic_read(&phist_data->snr[i]);
305 		if (value)
306 			p += sprintf(p, "snr[%02ddB] = %d\n", i, value);
307 	}
308 	for (i = 0; i < MWIFIEX_MAX_NOISE_FLR; i++) {
309 		value = atomic_read(&phist_data->noise_flr[i]);
310 		if (value)
311 			p += sprintf(p, "noise_flr[%02ddBm] = %d\n",
312 				(int)(i-128), value);
313 	}
314 	for (i = 0; i < MWIFIEX_MAX_SIG_STRENGTH; i++) {
315 		value = atomic_read(&phist_data->sig_str[i]);
316 		if (value)
317 			p += sprintf(p, "sig_strength[-%02ddBm] = %d\n",
318 				i, value);
319 	}
320 
321 	ret = simple_read_from_buffer(ubuf, count, ppos, (char *)page,
322 				      (unsigned long)p - page);
323 
324 	return ret;
325 }
326 
327 static ssize_t
328 mwifiex_histogram_write(struct file *file, const char __user *ubuf,
329 			size_t count, loff_t *ppos)
330 {
331 	struct mwifiex_private *priv = (void *)file->private_data;
332 
333 	if (priv && priv->hist_data)
334 		mwifiex_hist_data_reset(priv);
335 	return 0;
336 }
337 
338 static struct mwifiex_debug_info info;
339 
340 /*
341  * Proc debug file read handler.
342  *
343  * This function is called when the 'debug' file is opened for reading
344  * It prints the following log information -
345  *      - Interrupt count
346  *      - WMM AC VO packets count
347  *      - WMM AC VI packets count
348  *      - WMM AC BE packets count
349  *      - WMM AC BK packets count
350  *      - Maximum Tx buffer size
351  *      - Tx buffer size
352  *      - Current Tx buffer size
353  *      - Power Save mode
354  *      - Power Save state
355  *      - Deep Sleep status
356  *      - Device wakeup required status
357  *      - Number of wakeup tries
358  *      - Host Sleep configured status
359  *      - Host Sleep activated status
360  *      - Number of Tx timeouts
361  *      - Number of command timeouts
362  *      - Last timed out command ID
363  *      - Last timed out command action
364  *      - Last command ID
365  *      - Last command action
366  *      - Last command index
367  *      - Last command response ID
368  *      - Last command response index
369  *      - Last event
370  *      - Last event index
371  *      - Number of host to card command failures
372  *      - Number of sleep confirm command failures
373  *      - Number of host to card data failure
374  *      - Number of deauthentication events
375  *      - Number of disassociation events
376  *      - Number of link lost events
377  *      - Number of deauthentication commands
378  *      - Number of association success commands
379  *      - Number of association failure commands
380  *      - Number of commands sent
381  *      - Number of data packets sent
382  *      - Number of command responses received
383  *      - Number of events received
384  *      - Tx BA stream table (TID, RA)
385  *      - Rx reorder table (TID, TA, Start window, Window size, Buffer)
386  */
387 static ssize_t
388 mwifiex_debug_read(struct file *file, char __user *ubuf,
389 		   size_t count, loff_t *ppos)
390 {
391 	struct mwifiex_private *priv =
392 		(struct mwifiex_private *) file->private_data;
393 	unsigned long page = get_zeroed_page(GFP_KERNEL);
394 	char *p = (char *) page;
395 	ssize_t ret;
396 
397 	if (!p)
398 		return -ENOMEM;
399 
400 	ret = mwifiex_get_debug_info(priv, &info);
401 	if (ret)
402 		goto free_and_exit;
403 
404 	p += mwifiex_debug_info_to_buffer(priv, p, &info);
405 
406 	ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
407 				      (unsigned long) p - page);
408 
409 free_and_exit:
410 	free_page(page);
411 	return ret;
412 }
413 
414 static u32 saved_reg_type, saved_reg_offset, saved_reg_value;
415 
416 /*
417  * Proc regrdwr file write handler.
418  *
419  * This function is called when the 'regrdwr' file is opened for writing
420  *
421  * This function can be used to write to a register.
422  */
423 static ssize_t
424 mwifiex_regrdwr_write(struct file *file,
425 		      const char __user *ubuf, size_t count, loff_t *ppos)
426 {
427 	char *buf;
428 	int ret;
429 	u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;
430 
431 	buf = memdup_user_nul(ubuf, min(count, (size_t)(PAGE_SIZE - 1)));
432 	if (IS_ERR(buf))
433 		return PTR_ERR(buf);
434 
435 	sscanf(buf, "%u %x %x", &reg_type, &reg_offset, &reg_value);
436 
437 	if (reg_type == 0 || reg_offset == 0) {
438 		ret = -EINVAL;
439 		goto done;
440 	} else {
441 		saved_reg_type = reg_type;
442 		saved_reg_offset = reg_offset;
443 		saved_reg_value = reg_value;
444 		ret = count;
445 	}
446 done:
447 	kfree(buf);
448 	return ret;
449 }
450 
451 /*
452  * Proc regrdwr file read handler.
453  *
454  * This function is called when the 'regrdwr' file is opened for reading
455  *
456  * This function can be used to read from a register.
457  */
458 static ssize_t
459 mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
460 		     size_t count, loff_t *ppos)
461 {
462 	struct mwifiex_private *priv =
463 		(struct mwifiex_private *) file->private_data;
464 	unsigned long addr = get_zeroed_page(GFP_KERNEL);
465 	char *buf = (char *) addr;
466 	int pos = 0, ret = 0;
467 	u32 reg_value;
468 
469 	if (!buf)
470 		return -ENOMEM;
471 
472 	if (!saved_reg_type) {
473 		/* No command has been given */
474 		pos += snprintf(buf, PAGE_SIZE, "0");
475 		goto done;
476 	}
477 	/* Set command has been given */
478 	if (saved_reg_value != UINT_MAX) {
479 		ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
480 					saved_reg_value);
481 
482 		pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
483 				saved_reg_type, saved_reg_offset,
484 				saved_reg_value);
485 
486 		ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
487 
488 		goto done;
489 	}
490 	/* Get command has been given */
491 	ret = mwifiex_reg_read(priv, saved_reg_type,
492 			       saved_reg_offset, &reg_value);
493 	if (ret) {
494 		ret = -EINVAL;
495 		goto done;
496 	}
497 
498 	pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
499 			saved_reg_offset, reg_value);
500 
501 	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
502 
503 done:
504 	free_page(addr);
505 	return ret;
506 }
507 
508 /* Proc debug_mask file read handler.
509  * This function is called when the 'debug_mask' file is opened for reading
510  * This function can be used read driver debugging mask value.
511  */
512 static ssize_t
513 mwifiex_debug_mask_read(struct file *file, char __user *ubuf,
514 			size_t count, loff_t *ppos)
515 {
516 	struct mwifiex_private *priv =
517 		(struct mwifiex_private *)file->private_data;
518 	unsigned long page = get_zeroed_page(GFP_KERNEL);
519 	char *buf = (char *)page;
520 	size_t ret = 0;
521 	int pos = 0;
522 
523 	if (!buf)
524 		return -ENOMEM;
525 
526 	pos += snprintf(buf, PAGE_SIZE, "debug mask=0x%08x\n",
527 			priv->adapter->debug_mask);
528 	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
529 
530 	free_page(page);
531 	return ret;
532 }
533 
534 /* Proc debug_mask file read handler.
535  * This function is called when the 'debug_mask' file is opened for reading
536  * This function can be used read driver debugging mask value.
537  */
538 static ssize_t
539 mwifiex_debug_mask_write(struct file *file, const char __user *ubuf,
540 			 size_t count, loff_t *ppos)
541 {
542 	int ret;
543 	unsigned long debug_mask;
544 	struct mwifiex_private *priv = (void *)file->private_data;
545 	char *buf;
546 
547 	buf = memdup_user_nul(ubuf, min(count, (size_t)(PAGE_SIZE - 1)));
548 	if (IS_ERR(buf))
549 		return PTR_ERR(buf);
550 
551 	if (kstrtoul(buf, 0, &debug_mask)) {
552 		ret = -EINVAL;
553 		goto done;
554 	}
555 
556 	priv->adapter->debug_mask = debug_mask;
557 	ret = count;
558 done:
559 	kfree(buf);
560 	return ret;
561 }
562 
563 /* debugfs verext file write handler.
564  * This function is called when the 'verext' file is opened for write
565  */
566 static ssize_t
567 mwifiex_verext_write(struct file *file, const char __user *ubuf,
568 		     size_t count, loff_t *ppos)
569 {
570 	int ret;
571 	u32 versionstrsel;
572 	struct mwifiex_private *priv = (void *)file->private_data;
573 	char buf[16];
574 
575 	memset(buf, 0, sizeof(buf));
576 
577 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
578 		return -EFAULT;
579 
580 	ret = kstrtou32(buf, 10, &versionstrsel);
581 	if (ret)
582 		return ret;
583 
584 	priv->versionstrsel = versionstrsel;
585 
586 	return count;
587 }
588 
589 /* Proc verext file read handler.
590  * This function is called when the 'verext' file is opened for reading
591  * This function can be used read driver exteneed verion string.
592  */
593 static ssize_t
594 mwifiex_verext_read(struct file *file, char __user *ubuf,
595 		    size_t count, loff_t *ppos)
596 {
597 	struct mwifiex_private *priv =
598 		(struct mwifiex_private *)file->private_data;
599 	char buf[256];
600 	int ret;
601 
602 	mwifiex_get_ver_ext(priv, priv->versionstrsel);
603 	ret = snprintf(buf, sizeof(buf), "version string: %s\n",
604 		       priv->version_str);
605 
606 	return simple_read_from_buffer(ubuf, count, ppos, buf, ret);
607 }
608 
609 /* Proc memrw file write handler.
610  * This function is called when the 'memrw' file is opened for writing
611  * This function can be used to write to a memory location.
612  */
613 static ssize_t
614 mwifiex_memrw_write(struct file *file, const char __user *ubuf, size_t count,
615 		    loff_t *ppos)
616 {
617 	int ret;
618 	char cmd;
619 	struct mwifiex_ds_mem_rw mem_rw;
620 	u16 cmd_action;
621 	struct mwifiex_private *priv = (void *)file->private_data;
622 	char *buf;
623 
624 	buf = memdup_user_nul(ubuf, min(count, (size_t)(PAGE_SIZE - 1)));
625 	if (IS_ERR(buf))
626 		return PTR_ERR(buf);
627 
628 	ret = sscanf(buf, "%c %x %x", &cmd, &mem_rw.addr, &mem_rw.value);
629 	if (ret != 3) {
630 		ret = -EINVAL;
631 		goto done;
632 	}
633 
634 	if ((cmd == 'r') || (cmd == 'R')) {
635 		cmd_action = HostCmd_ACT_GEN_GET;
636 		mem_rw.value = 0;
637 	} else if ((cmd == 'w') || (cmd == 'W')) {
638 		cmd_action = HostCmd_ACT_GEN_SET;
639 	} else {
640 		ret = -EINVAL;
641 		goto done;
642 	}
643 
644 	memcpy(&priv->mem_rw, &mem_rw, sizeof(mem_rw));
645 	if (mwifiex_send_cmd(priv, HostCmd_CMD_MEM_ACCESS, cmd_action, 0,
646 			     &mem_rw, true))
647 		ret = -1;
648 	else
649 		ret = count;
650 
651 done:
652 	kfree(buf);
653 	return ret;
654 }
655 
656 /* Proc memrw file read handler.
657  * This function is called when the 'memrw' file is opened for reading
658  * This function can be used to read from a memory location.
659  */
660 static ssize_t
661 mwifiex_memrw_read(struct file *file, char __user *ubuf,
662 		   size_t count, loff_t *ppos)
663 {
664 	struct mwifiex_private *priv = (void *)file->private_data;
665 	unsigned long addr = get_zeroed_page(GFP_KERNEL);
666 	char *buf = (char *)addr;
667 	int ret, pos = 0;
668 
669 	if (!buf)
670 		return -ENOMEM;
671 
672 	pos += snprintf(buf, PAGE_SIZE, "0x%x 0x%x\n", priv->mem_rw.addr,
673 			priv->mem_rw.value);
674 	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
675 
676 	free_page(addr);
677 	return ret;
678 }
679 
680 static u32 saved_offset = -1, saved_bytes = -1;
681 
682 /*
683  * Proc rdeeprom file write handler.
684  *
685  * This function is called when the 'rdeeprom' file is opened for writing
686  *
687  * This function can be used to write to a RDEEPROM location.
688  */
689 static ssize_t
690 mwifiex_rdeeprom_write(struct file *file,
691 		       const char __user *ubuf, size_t count, loff_t *ppos)
692 {
693 	char *buf;
694 	int ret = 0;
695 	int offset = -1, bytes = -1;
696 
697 	buf = memdup_user_nul(ubuf, min(count, (size_t)(PAGE_SIZE - 1)));
698 	if (IS_ERR(buf))
699 		return PTR_ERR(buf);
700 
701 	sscanf(buf, "%d %d", &offset, &bytes);
702 
703 	if (offset == -1 || bytes == -1) {
704 		ret = -EINVAL;
705 		goto done;
706 	} else {
707 		saved_offset = offset;
708 		saved_bytes = bytes;
709 		ret = count;
710 	}
711 done:
712 	kfree(buf);
713 	return ret;
714 }
715 
716 /*
717  * Proc rdeeprom read write handler.
718  *
719  * This function is called when the 'rdeeprom' file is opened for reading
720  *
721  * This function can be used to read from a RDEEPROM location.
722  */
723 static ssize_t
724 mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
725 		      size_t count, loff_t *ppos)
726 {
727 	struct mwifiex_private *priv =
728 		(struct mwifiex_private *) file->private_data;
729 	unsigned long addr = get_zeroed_page(GFP_KERNEL);
730 	char *buf = (char *) addr;
731 	int pos, ret, i;
732 	u8 value[MAX_EEPROM_DATA];
733 
734 	if (!buf)
735 		return -ENOMEM;
736 
737 	if (saved_offset == -1) {
738 		/* No command has been given */
739 		pos = snprintf(buf, PAGE_SIZE, "0");
740 		goto done;
741 	}
742 
743 	/* Get command has been given */
744 	ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
745 				  (u16) saved_bytes, value);
746 	if (ret) {
747 		ret = -EINVAL;
748 		goto out_free;
749 	}
750 
751 	pos = snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);
752 
753 	for (i = 0; i < saved_bytes; i++)
754 		pos += scnprintf(buf + pos, PAGE_SIZE - pos, "%d ", value[i]);
755 
756 done:
757 	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
758 out_free:
759 	free_page(addr);
760 	return ret;
761 }
762 
763 /* Proc hscfg file write handler
764  * This function can be used to configure the host sleep parameters.
765  */
766 static ssize_t
767 mwifiex_hscfg_write(struct file *file, const char __user *ubuf,
768 		    size_t count, loff_t *ppos)
769 {
770 	struct mwifiex_private *priv = (void *)file->private_data;
771 	char *buf;
772 	int ret, arg_num;
773 	struct mwifiex_ds_hs_cfg hscfg;
774 	int conditions = HS_CFG_COND_DEF;
775 	u32 gpio = HS_CFG_GPIO_DEF, gap = HS_CFG_GAP_DEF;
776 
777 	buf = memdup_user_nul(ubuf, min(count, (size_t)(PAGE_SIZE - 1)));
778 	if (IS_ERR(buf))
779 		return PTR_ERR(buf);
780 
781 	arg_num = sscanf(buf, "%d %x %x", &conditions, &gpio, &gap);
782 
783 	memset(&hscfg, 0, sizeof(struct mwifiex_ds_hs_cfg));
784 
785 	if (arg_num > 3) {
786 		mwifiex_dbg(priv->adapter, ERROR,
787 			    "Too many arguments\n");
788 		ret = -EINVAL;
789 		goto done;
790 	}
791 
792 	if (arg_num >= 1 && arg_num < 3)
793 		mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
794 				      MWIFIEX_SYNC_CMD, &hscfg);
795 
796 	if (arg_num) {
797 		if (conditions == HS_CFG_CANCEL) {
798 			mwifiex_cancel_hs(priv, MWIFIEX_ASYNC_CMD);
799 			ret = count;
800 			goto done;
801 		}
802 		hscfg.conditions = conditions;
803 	}
804 	if (arg_num >= 2)
805 		hscfg.gpio = gpio;
806 	if (arg_num == 3)
807 		hscfg.gap = gap;
808 
809 	hscfg.is_invoke_hostcmd = false;
810 	mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_SET,
811 			      MWIFIEX_SYNC_CMD, &hscfg);
812 
813 	mwifiex_enable_hs(priv->adapter);
814 	clear_bit(MWIFIEX_IS_HS_ENABLING, &priv->adapter->work_flags);
815 	ret = count;
816 done:
817 	kfree(buf);
818 	return ret;
819 }
820 
821 /* Proc hscfg file read handler
822  * This function can be used to read host sleep configuration
823  * parameters from driver.
824  */
825 static ssize_t
826 mwifiex_hscfg_read(struct file *file, char __user *ubuf,
827 		   size_t count, loff_t *ppos)
828 {
829 	struct mwifiex_private *priv = (void *)file->private_data;
830 	unsigned long addr = get_zeroed_page(GFP_KERNEL);
831 	char *buf = (char *)addr;
832 	int pos, ret;
833 	struct mwifiex_ds_hs_cfg hscfg;
834 
835 	if (!buf)
836 		return -ENOMEM;
837 
838 	mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
839 			      MWIFIEX_SYNC_CMD, &hscfg);
840 
841 	pos = snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", hscfg.conditions,
842 		       hscfg.gpio, hscfg.gap);
843 
844 	ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
845 
846 	free_page(addr);
847 	return ret;
848 }
849 
850 static ssize_t
851 mwifiex_timeshare_coex_read(struct file *file, char __user *ubuf,
852 			    size_t count, loff_t *ppos)
853 {
854 	struct mwifiex_private *priv = file->private_data;
855 	char buf[3];
856 	bool timeshare_coex;
857 	int ret;
858 	unsigned int len;
859 
860 	if (priv->adapter->fw_api_ver != MWIFIEX_FW_V15)
861 		return -EOPNOTSUPP;
862 
863 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_ROBUST_COEX,
864 			       HostCmd_ACT_GEN_GET, 0, &timeshare_coex, true);
865 	if (ret)
866 		return ret;
867 
868 	len = sprintf(buf, "%d\n", timeshare_coex);
869 	return simple_read_from_buffer(ubuf, count, ppos, buf, len);
870 }
871 
872 static ssize_t
873 mwifiex_timeshare_coex_write(struct file *file, const char __user *ubuf,
874 			     size_t count, loff_t *ppos)
875 {
876 	bool timeshare_coex;
877 	struct mwifiex_private *priv = file->private_data;
878 	char kbuf[16];
879 	int ret;
880 
881 	if (priv->adapter->fw_api_ver != MWIFIEX_FW_V15)
882 		return -EOPNOTSUPP;
883 
884 	memset(kbuf, 0, sizeof(kbuf));
885 
886 	if (copy_from_user(&kbuf, ubuf, min_t(size_t, sizeof(kbuf) - 1, count)))
887 		return -EFAULT;
888 
889 	if (strtobool(kbuf, &timeshare_coex))
890 		return -EINVAL;
891 
892 	ret = mwifiex_send_cmd(priv, HostCmd_CMD_ROBUST_COEX,
893 			       HostCmd_ACT_GEN_SET, 0, &timeshare_coex, true);
894 	if (ret)
895 		return ret;
896 	else
897 		return count;
898 }
899 
900 static ssize_t
901 mwifiex_reset_write(struct file *file,
902 		    const char __user *ubuf, size_t count, loff_t *ppos)
903 {
904 	struct mwifiex_private *priv = file->private_data;
905 	struct mwifiex_adapter *adapter = priv->adapter;
906 	bool result;
907 	int rc;
908 
909 	rc = kstrtobool_from_user(ubuf, count, &result);
910 	if (rc)
911 		return rc;
912 
913 	if (!result)
914 		return -EINVAL;
915 
916 	if (adapter->if_ops.card_reset) {
917 		dev_info(adapter->dev, "Resetting per request\n");
918 		adapter->if_ops.card_reset(adapter);
919 	}
920 
921 	return count;
922 }
923 
924 #define MWIFIEX_DFS_ADD_FILE(name) do {                                 \
925 	debugfs_create_file(#name, 0644, priv->dfs_dev_dir, priv,       \
926 			    &mwifiex_dfs_##name##_fops);                \
927 } while (0);
928 
929 #define MWIFIEX_DFS_FILE_OPS(name)                                      \
930 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
931 	.read = mwifiex_##name##_read,                                  \
932 	.write = mwifiex_##name##_write,                                \
933 	.open = simple_open,                                            \
934 };
935 
936 #define MWIFIEX_DFS_FILE_READ_OPS(name)                                 \
937 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
938 	.read = mwifiex_##name##_read,                                  \
939 	.open = simple_open,                                            \
940 };
941 
942 #define MWIFIEX_DFS_FILE_WRITE_OPS(name)                                \
943 static const struct file_operations mwifiex_dfs_##name##_fops = {       \
944 	.write = mwifiex_##name##_write,                                \
945 	.open = simple_open,                                            \
946 };
947 
948 
949 MWIFIEX_DFS_FILE_READ_OPS(info);
950 MWIFIEX_DFS_FILE_READ_OPS(debug);
951 MWIFIEX_DFS_FILE_READ_OPS(getlog);
952 MWIFIEX_DFS_FILE_OPS(regrdwr);
953 MWIFIEX_DFS_FILE_OPS(rdeeprom);
954 MWIFIEX_DFS_FILE_OPS(memrw);
955 MWIFIEX_DFS_FILE_OPS(hscfg);
956 MWIFIEX_DFS_FILE_OPS(histogram);
957 MWIFIEX_DFS_FILE_OPS(debug_mask);
958 MWIFIEX_DFS_FILE_OPS(timeshare_coex);
959 MWIFIEX_DFS_FILE_WRITE_OPS(reset);
960 MWIFIEX_DFS_FILE_OPS(verext);
961 
962 /*
963  * This function creates the debug FS directory structure and the files.
964  */
965 void
966 mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
967 {
968 	if (!mwifiex_dfs_dir || !priv)
969 		return;
970 
971 	priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
972 					       mwifiex_dfs_dir);
973 
974 	if (!priv->dfs_dev_dir)
975 		return;
976 
977 	MWIFIEX_DFS_ADD_FILE(info);
978 	MWIFIEX_DFS_ADD_FILE(debug);
979 	MWIFIEX_DFS_ADD_FILE(getlog);
980 	MWIFIEX_DFS_ADD_FILE(regrdwr);
981 	MWIFIEX_DFS_ADD_FILE(rdeeprom);
982 
983 	MWIFIEX_DFS_ADD_FILE(memrw);
984 	MWIFIEX_DFS_ADD_FILE(hscfg);
985 	MWIFIEX_DFS_ADD_FILE(histogram);
986 	MWIFIEX_DFS_ADD_FILE(debug_mask);
987 	MWIFIEX_DFS_ADD_FILE(timeshare_coex);
988 	MWIFIEX_DFS_ADD_FILE(reset);
989 	MWIFIEX_DFS_ADD_FILE(verext);
990 }
991 
992 /*
993  * This function removes the debug FS directory structure and the files.
994  */
995 void
996 mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
997 {
998 	if (!priv)
999 		return;
1000 
1001 	debugfs_remove_recursive(priv->dfs_dev_dir);
1002 }
1003 
1004 /*
1005  * This function creates the top level proc directory.
1006  */
1007 void
1008 mwifiex_debugfs_init(void)
1009 {
1010 	if (!mwifiex_dfs_dir)
1011 		mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
1012 }
1013 
1014 /*
1015  * This function removes the top level proc directory.
1016  */
1017 void
1018 mwifiex_debugfs_remove(void)
1019 {
1020 	debugfs_remove(mwifiex_dfs_dir);
1021 }
1022