aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath5k/debug.c
blob: 747508c15d34c33140d017f90796d0d0236b0967 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
/*
 * Copyright (c) 2007-2008 Bruno Randolf <bruno@thinktube.com>
 *
 *  This file is free software: you may copy, redistribute and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation, either version 2 of the License, or (at your
 *  option) any later version.
 *
 *  This file is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
 * Copyright (c) 2004-2005 Atheros Communications, Inc.
 * Copyright (c) 2006 Devicescape Software, Inc.
 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
 *    redistribution must be conditioned upon including a substantially
 *    similar Disclaimer requirement for further binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGES.
 */

#include "base.h"
#include "debug.h"

static unsigned int ath5k_debug;
module_param_named(debug, ath5k_debug, uint, 0);


#ifdef CONFIG_ATH5K_DEBUG

#include <linux/seq_file.h>
#include "reg.h"

static struct dentry *ath5k_global_debugfs;

static int ath5k_debugfs_open(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}


/* debugfs: registers */

struct reg {
	const char *name;
	int addr;
};

#define REG_STRUCT_INIT(r) { #r, r }

/* just a few random registers, might want to add more */
static const struct reg regs[] = {
	REG_STRUCT_INIT(AR5K_CR),
	REG_STRUCT_INIT(AR5K_RXDP),
	REG_STRUCT_INIT(AR5K_CFG),
	REG_STRUCT_INIT(AR5K_IER),
	REG_STRUCT_INIT(AR5K_BCR),
	REG_STRUCT_INIT(AR5K_RTSD0),
	REG_STRUCT_INIT(AR5K_RTSD1),
	REG_STRUCT_INIT(AR5K_TXCFG),
	REG_STRUCT_INIT(AR5K_RXCFG),
	REG_STRUCT_INIT(AR5K_RXJLA),
	REG_STRUCT_INIT(AR5K_MIBC),
	REG_STRUCT_INIT(AR5K_TOPS),
	REG_STRUCT_INIT(AR5K_RXNOFRM),
	REG_STRUCT_INIT(AR5K_TXNOFRM),
	REG_STRUCT_INIT(AR5K_RPGTO),
	REG_STRUCT_INIT(AR5K_RFCNT),
	REG_STRUCT_INIT(AR5K_MISC),
	REG_STRUCT_INIT(AR5K_QCUDCU_CLKGT),
	REG_STRUCT_INIT(AR5K_ISR),
	REG_STRUCT_INIT(AR5K_PISR),
	REG_STRUCT_INIT(AR5K_SISR0),
	REG_STRUCT_INIT(AR5K_SISR1),
	REG_STRUCT_INIT(AR5K_SISR2),
	REG_STRUCT_INIT(AR5K_SISR3),
	REG_STRUCT_INIT(AR5K_SISR4),
	REG_STRUCT_INIT(AR5K_IMR),
	REG_STRUCT_INIT(AR5K_PIMR),
	REG_STRUCT_INIT(AR5K_SIMR0),
	REG_STRUCT_INIT(AR5K_SIMR1),
	REG_STRUCT_INIT(AR5K_SIMR2),
	REG_STRUCT_INIT(AR5K_SIMR3),
	REG_STRUCT_INIT(AR5K_SIMR4),
	REG_STRUCT_INIT(AR5K_DCM_ADDR),
	REG_STRUCT_INIT(AR5K_DCCFG),
	REG_STRUCT_INIT(AR5K_CCFG),
	REG_STRUCT_INIT(AR5K_CPC0),
	REG_STRUCT_INIT(AR5K_CPC1),
	REG_STRUCT_INIT(AR5K_CPC2),
	REG_STRUCT_INIT(AR5K_CPC3),
	REG_STRUCT_INIT(AR5K_CPCOVF),
	REG_STRUCT_INIT(AR5K_RESET_CTL),
	REG_STRUCT_INIT(AR5K_SLEEP_CTL),
	REG_STRUCT_INIT(AR5K_INTPEND),
	REG_STRUCT_INIT(AR5K_SFR),
	REG_STRUCT_INIT(AR5K_PCICFG),
	REG_STRUCT_INIT(AR5K_GPIOCR),
	REG_STRUCT_INIT(AR5K_GPIODO),
	REG_STRUCT_INIT(AR5K_SREV),
};

static void *reg_start(struct seq_file *seq, loff_t *pos)
{
	return *pos < ARRAY_SIZE(regs) ? (void *)&regs[*pos] : NULL;
}

static void reg_stop(struct seq_file *seq, void *p)
{
	/* nothing to do */
}

static void *reg_next(struct seq_file *seq, void *p, loff_t *pos)
{
	++*pos;
	return *pos < ARRAY_SIZE(regs) ? (void *)&regs[*pos] : NULL;
}

static int reg_show(struct seq_file *seq, void *p)
{
	struct ath5k_softc *sc = seq->private;
	struct reg *r = p;
	seq_printf(seq, "%-25s0x%08x\n", r->name,
		ath5k_hw_reg_read(sc->ah, r->addr));
	return 0;
}

static const struct seq_operations register_seq_ops = {
	.start = reg_start,
	.next  = reg_next,
	.stop  = reg_stop,
	.show  = reg_show
};

static int open_file_registers(struct inode *inode, struct file *file)
{
	struct seq_file *s;
	int res;
	res = seq_open(file, &register_seq_ops);
	if (res == 0) {
		s = file->private_data;
		s->private = inode->i_private;
	}
	return res;
}

static const struct file_operations fops_registers = {
	.open = open_file_registers,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release,
	.owner = THIS_MODULE,
};


/* debugfs: beacons */

static ssize_t read_file_beacon(struct file *file, char __user *user_buf,
				   size_t count, loff_t *ppos)
{
	struct ath5k_softc *sc = file->private_data;
	struct ath5k_hw *ah = sc->ah;
	char buf[500];
	unsigned int len = 0;
	unsigned int v;
	u64 tsf;

	v = ath5k_hw_reg_read(sc->ah, AR5K_BEACON);
	len += snprintf(buf+len, sizeof(buf)-len,
		"%-24s0x%08x\tintval: %d\tTIM: 0x%x\n",
		"AR5K_BEACON", v, v & AR5K_BEACON_PERIOD,
		(v & AR5K_BEACON_TIM) >> AR5K_BEACON_TIM_S);

	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\n",
		"AR5K_LAST_TSTP", ath5k_hw_reg_read(sc->ah, AR5K_LAST_TSTP));

	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\n\n",
		"AR5K_BEACON_CNT", ath5k_hw_reg_read(sc->ah, AR5K_BEACON_CNT));

	v = ath5k_hw_reg_read(sc->ah, AR5K_TIMER0);
	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\tTU: %08x\n",
		"AR5K_TIMER0 (TBTT)", v, v);

	v = ath5k_hw_reg_read(sc->ah, AR5K_TIMER1);
	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\tTU: %08x\n",
		"AR5K_TIMER1 (DMA)", v, v >> 3);

	v = ath5k_hw_reg_read(sc->ah, AR5K_TIMER2);
	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\tTU: %08x\n",
		"AR5K_TIMER2 (SWBA)", v, v >> 3);

	v = ath5k_hw_reg_read(sc->ah, AR5K_TIMER3);
	len += snprintf(buf+len, sizeof(buf)-len, "%-24s0x%08x\tTU: %08x\n",
		"AR5K_TIMER3 (ATIM)", v, v);

	tsf = ath5k_hw_get_tsf64(sc->ah);
	len += snprintf(buf+len, sizeof(buf)-len,
		"TSF\t\t0x%016llx\tTU: %08x\n",
		(unsigned long long)tsf, TSF_TO_TU(tsf));

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_beacon(struct file *file,
				 const char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	struct ath5k_softc *sc = file->private_data;
	struct ath5k_hw *ah = sc->ah;
	char buf[20];

	if (copy_from_user(buf, userbuf, min(count, sizeof(buf))))
		return -EFAULT;

	if (strncmp(buf, "disable", 7) == 0) {
		AR5K_REG_DISABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE);
		printk(KERN_INFO "debugfs disable beacons\n");
	} else if (strncmp(buf, "enable", 6) == 0) {
		AR5K_REG_ENABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE);
		printk(KERN_INFO "debugfs enable beacons\n");
	}
	return count;
}

static const struct file_operations fops_beacon = {
	.read = read_file_beacon,
	.write = write_file_beacon,
	.open = ath5k_debugfs_open,
	.owner = THIS_MODULE,
};


/* debugfs: reset */

static ssize_t write_file_reset(struct file *file,
				 const char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	struct ath5k_softc *sc = file->private_data;
	tasklet_schedule(&sc->restq);
	return count;
}

static const struct file_operations fops_reset = {
	.write = write_file_reset,
	.open = ath5k_debugfs_open,
	.owner = THIS_MODULE,
};


/* debugfs: debug level */

static const struct {
	enum ath5k_debug_level level;
	const char *name;
	const char *desc;
} dbg_info[] = {
	{ ATH5K_DEBUG_RESET,	"reset",	"reset and initialization" },
	{ ATH5K_DEBUG_INTR,	"intr",		"interrupt handling" },
	{ ATH5K_DEBUG_MODE,	"mode",		"mode init/setup" },
	{ ATH5K_DEBUG_XMIT,	"xmit",		"basic xmit operation" },
	{ ATH5K_DEBUG_BEACON,	"beacon",	"beacon handling" },
	{ ATH5K_DEBUG_CALIBRATE, "calib",	"periodic calibration" },
	{ ATH5K_DEBUG_TXPOWER,	"txpower",	"transmit power setting" },
	{ ATH5K_DEBUG_LED,	"led",		"LED management" },
	{ ATH5K_DEBUG_DUMP_RX,	"dumprx",	"print received skb content" },
	{ ATH5K_DEBUG_DUMP_TX,	"dumptx",	"print transmit skb content" },
	{ ATH5K_DEBUG_DUMPBANDS, "dumpbands",	"dump bands" },
	{ ATH5K_DEBUG_TRACE,	"trace",	"trace function calls" },
	{ ATH5K_DEBUG_ANY,	"all",		"show all debug levels" },
};

static ssize_t read_file_debug(struct file *file, char __user *user_buf,
				   size_t count, loff_t *ppos)
{
	struct ath5k_softc *sc = file->private_data;
	char buf[700];
	unsigned int len = 0;
	unsigned int i;

	len += snprintf(buf+len, sizeof(buf)-len,
		"DEBUG LEVEL: 0x%08x\n\n", sc->debug.level);

	for (i = 0; i < ARRAY_SIZE(dbg_info) - 1; i++) {
		len += snprintf(buf+len, sizeof(buf)-len,
			"%10s %c 0x%08x - %s\n", dbg_info[i].name,
			sc->debug.level & dbg_info[i].level ? '+' : ' ',
			dbg_info[i].level, dbg_info[i].desc);
	}
	len += snprintf(buf+len, sizeof(buf)-len,
		"%10s %c 0x%08x - %s\n", dbg_info[i].name,
		sc->debug.level == dbg_info[i].level ? '+' : ' ',
		dbg_info[i].level, dbg_info[i].desc);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t write_file_debug(struct file *file,
				 const char __user *userbuf,
				 size_t count, loff_t *ppos)
{
	struct ath5k_softc *sc = file->private_data;
	unsigned int i;
	char buf[20];

	if (copy_from_user(buf, userbuf, min(count, sizeof(buf))))
		return -EFAULT;

	for (i = 0; i < ARRAY_SIZE(dbg_info); i++) {
		if (strncmp(buf, dbg_info[i].name,
					strlen(dbg_info[i].name)) == 0) {
			sc->debug.level ^= dbg_info[i].level; /* toggle bit */
			break;
		}
	}
	return count;
}

static const struct file_operations fops_debug = {
	.read = read_file_debug,
	.write = write_file_debug,
	.open = ath5k_debugfs_open,
	.owner = THIS_MODULE,
};


/* init */

void
ath5k_debug_init(void)
{
	ath5k_global_debugfs = debugfs_create_dir("ath5k", NULL);
}

void
ath5k_debug_init_device(struct ath5k_softc *sc)
{
	sc->debug.level = ath5k_debug;

	sc->debug.debugfs_phydir = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
				ath5k_global_debugfs);

	sc->debug.debugfs_debug = debugfs_create_file("debug",
				S_IWUSR | S_IRUSR,
				sc->debug.debugfs_phydir, sc, &fops_debug);

	sc->debug.debugfs_registers = debugfs_create_file("registers", S_IRUSR,
				sc->debug.debugfs_phydir, sc, &fops_registers);

	sc->debug.debugfs_beacon = debugfs_create_file("beacon",
				S_IWUSR | S_IRUSR,
				sc->debug.debugfs_phydir, sc, &fops_beacon);

	sc->debug.debugfs_reset = debugfs_create_file("reset", S_IWUSR,
				sc->debug.debugfs_phydir, sc, &fops_reset);
}

void
ath5k_debug_finish(void)
{
	debugfs_remove(ath5k_global_debugfs);
}

void
ath5k_debug_finish_device(struct ath5k_softc *sc)
{
	debugfs_remove(sc->debug.debugfs_debug);
	debugfs_remove(sc->debug.debugfs_registers);
	debugfs_remove(sc->debug.debugfs_beacon);
	debugfs_remove(sc->debug.debugfs_reset);
	debugfs_remove(sc->debug.debugfs_phydir);
}


/* functions used in other places */

void
ath5k_debug_dump_bands(struct ath5k_softc *sc)
{
	unsigned int b, i;

	if (likely(!(sc->debug.level & ATH5K_DEBUG_DUMPBANDS)))
		return;

	BUG_ON(!sc->sbands);

	for (b = 0; b < IEEE80211_NUM_BANDS; b++) {
		struct ieee80211_supported_band *band = &sc->sbands[b];
		char bname[6];
		switch (band->band) {
		case IEEE80211_BAND_2GHZ:
			strcpy(bname, "2 GHz");
			break;
		case IEEE80211_BAND_5GHZ:
			strcpy(bname, "5 GHz");
			break;
		default:
			printk(KERN_DEBUG "Band not supported: %d\n",
				band->band);
			return;
		}
		printk(KERN_DEBUG "Band %s: channels %d, rates %d\n", bname,
				band->n_channels, band->n_bitrates);
		printk(KERN_DEBUG " channels:\n");
		for (i = 0; i < band->n_channels; i++)
			printk(KERN_DEBUG "  %3d %d %.4x %.4x\n",
					ieee80211_frequency_to_channel(
						band->channels[i].center_freq),
					band->channels[i].center_freq,
					band->channels[i].hw_value,
					band->channels[i].flags);
		printk(KERN_DEBUG " rates:\n");
		for (i = 0; i < band->n_bitrates; i++)
			printk(KERN_DEBUG "  %4d %.4x %.4x %.4x\n",
					band->bitrates[i].bitrate,
					band->bitrates[i].hw_value,
					band->bitrates[i].flags,
					band->bitrates[i].hw_value_short);
	}
}

static inline void
ath5k_debug_printrxbuf(struct ath5k_buf *bf, int done,
		       struct ath5k_rx_status *rs)
{
	struct ath5k_desc *ds = bf->desc;
	struct ath5k_hw_all_rx_desc *rd = &ds->ud.ds_rx;

	printk(KERN_DEBUG "R (%p %llx) %08x %08x %08x %08x %08x %08x %c\n",
		ds, (unsigned long long)bf->daddr,
		ds->ds_link, ds->ds_data,
		rd->rx_ctl.rx_control_0, rd->rx_ctl.rx_control_1,
		rd->u.rx_stat.rx_status_0, rd->u.rx_stat.rx_status_0,
		!done ? ' ' : (rs->rs_status == 0) ? '*' : '!');
}

void
ath5k_debug_printrxbuffs(struct ath5k_softc *sc, struct ath5k_hw *ah)
{
	struct ath5k_desc *ds;
	struct ath5k_buf *bf;
	struct ath5k_rx_status rs = {};
	int status;

	if (likely(!(sc->debug.level & ATH5K_DEBUG_RESET)))
		return;

	printk(KERN_DEBUG "rx queue %x, link %p\n",
		ath5k_hw_get_rxdp(ah), sc->rxlink);

	spin_lock_bh(&sc->rxbuflock);
	list_for_each_entry(bf, &sc->rxbuf, list) {
		ds = bf->desc;
		status = ah->ah_proc_rx_desc(ah, ds, &rs);
		if (!status)
			ath5k_debug_printrxbuf(bf, status == 0, &rs);
	}
	spin_unlock_bh(&sc->rxbuflock);
}

void
ath5k_debug_dump_skb(struct ath5k_softc *sc,
			struct sk_buff *skb, const char *prefix, int tx)
{
	char buf[16];

	if (likely(!((tx && (sc->debug.level & ATH5K_DEBUG_DUMP_TX)) ||
		     (!tx && (sc->debug.level & ATH5K_DEBUG_DUMP_RX)))))
		return;

	snprintf(buf, sizeof(buf), "%s %s", wiphy_name(sc->hw->wiphy), prefix);

	print_hex_dump_bytes(buf, DUMP_PREFIX_NONE, skb->data,
		min(200U, skb->len));

	printk(KERN_DEBUG "\n");
}

void
ath5k_debug_printtxbuf(struct ath5k_softc *sc, struct ath5k_buf *bf)
{
	struct ath5k_desc *ds = bf->desc;
	struct ath5k_hw_5212_tx_desc *td = &ds->ud.ds_tx5212;
	struct ath5k_tx_status ts = {};
	int done;

	if (likely(!(sc->debug.level & ATH5K_DEBUG_RESET)))
		return;

	done = sc->ah->ah_proc_tx_desc(sc->ah, bf->desc, &ts);

	printk(KERN_DEBUG "T (%p %llx) %08x %08x %08x %08x %08x %08x %08x "
		"%08x %c\n", ds, (unsigned long long)bf->daddr, ds->ds_link,
		ds->ds_data, td->tx_ctl.tx_control_0, td->tx_ctl.tx_control_1,
		td->tx_ctl.tx_control_2, td->tx_ctl.tx_control_3,
		td->tx_stat.tx_status_0, td->tx_stat.tx_status_1,
		done ? ' ' : (ts.ts_status == 0) ? '*' : '!');
}

#endif /* ifdef CONFIG_ATH5K_DEBUG */