1 /*
2 * Copyright (c) 2008-2009 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <asm/unaligned.h>
18
19 #include "ath9k.h"
20
21 static unsigned int ath9k_debug = DBG_DEFAULT;
22 module_param_named(debug, ath9k_debug, uint, 0);
23
24 static struct dentry *ath9k_debugfs_root;
25
26 void DPRINTF(struct ath_softc *sc, int dbg_mask, const char *fmt, ...)
27 {
28 if (!sc)
29 return;
30
31 if (sc->debug.debug_mask & dbg_mask) {
32 va_list args;
33
34 va_start(args, fmt);
35 printk(KERN_DEBUG "ath9k: ");
36 vprintk(fmt, args);
37 va_end(args);
38 }
39 }
40
41 static int ath9k_debugfs_open(struct inode *inode, struct file *file)
42 {
43 file->private_data = inode->i_private;
44 return 0;
45 }
46
47 static ssize_t read_file_debug(struct file *file, char __user *user_buf,
48 size_t count, loff_t *ppos)
49 {
50 struct ath_softc *sc = file->private_data;
51 char buf[32];
52 unsigned int len;
53
54 len = snprintf(buf, sizeof(buf), "0x%08x\n", sc->debug.debug_mask);
55 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
56 }
57
58 static ssize_t write_file_debug(struct file *file, const char __user *user_buf,
59 size_t count, loff_t *ppos)
60 {
61 struct ath_softc *sc = file->private_data;
62 unsigned long mask;
63 char buf[32];
64 ssize_t len;
65
66 len = min(count, sizeof(buf) - 1);
67 if (copy_from_user(buf, user_buf, len))
68 return -EINVAL;
69
70 buf[len] = '\0';
71 if (strict_strtoul(buf, 0, &mask))
72 return -EINVAL;
73
74 sc->debug.debug_mask = mask;
75 return count;
76 }
77
78 static const struct file_operations fops_debug = {
79 .read = read_file_debug,
80 .write = write_file_debug,
81 .open = ath9k_debugfs_open,
82 .owner = THIS_MODULE
83 };
84
85 static ssize_t read_file_dma(struct file *file, char __user *user_buf,
86 size_t count, loff_t *ppos)
87 {
88 struct ath_softc *sc = file->private_data;
89 struct ath_hw *ah = sc->sc_ah;
90 char buf[1024];
91 unsigned int len = 0;
92 u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
93 int i, qcuOffset = 0, dcuOffset = 0;
94 u32 *qcuBase = &val[0], *dcuBase = &val[4];
95
96 REG_WRITE(ah, AR_MACMISC,
97 ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
98 (AR_MACMISC_MISC_OBS_BUS_1 <<
99 AR_MACMISC_MISC_OBS_BUS_MSB_S)));
100
101 len += snprintf(buf + len, sizeof(buf) - len,
102 "Raw DMA Debug values:\n");
103
104 for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
105 if (i % 4 == 0)
106 len += snprintf(buf + len, sizeof(buf) - len, "\n");
107
108 val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
109 len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
110 i, val[i]);
111 }
112
113 len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
114 len += snprintf(buf + len, sizeof(buf) - len,
115 "Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
116
117 for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
118 if (i == 8) {
119 qcuOffset = 0;
120 qcuBase++;
121 }
122
123 if (i == 6) {
124 dcuOffset = 0;
125 dcuBase++;
126 }
127
128 len += snprintf(buf + len, sizeof(buf) - len,
129 "%2d %2x %1x %2x %2x\n",
130 i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
131 (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
132 val[2] & (0x7 << (i * 3)) >> (i * 3),
133 (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
134 }
135
136 len += snprintf(buf + len, sizeof(buf) - len, "\n");
137
138 len += snprintf(buf + len, sizeof(buf) - len,
139 "qcu_stitch state: %2x qcu_fetch state: %2x\n",
140 (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
141 len += snprintf(buf + len, sizeof(buf) - len,
142 "qcu_complete state: %2x dcu_complete state: %2x\n",
143 (val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
144 len += snprintf(buf + len, sizeof(buf) - len,
145 "dcu_arb state: %2x dcu_fp state: %2x\n",
146 (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
147 len += snprintf(buf + len, sizeof(buf) - len,
148 "chan_idle_dur: %3d chan_idle_dur_valid: %1d\n",
149 (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
150 len += snprintf(buf + len, sizeof(buf) - len,
151 "txfifo_valid_0: %1d txfifo_valid_1: %1d\n",
152 (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
153 len += snprintf(buf + len, sizeof(buf) - len,
154 "txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n",
155 (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
156
157 len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
158 REG_READ(ah, AR_OBS_BUS_1));
159 len += snprintf(buf + len, sizeof(buf) - len,
160 "AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
161
162 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
163 }
164
165 static const struct file_operations fops_dma = {
166 .read = read_file_dma,
167 .open = ath9k_debugfs_open,
168 .owner = THIS_MODULE
169 };
170
171
172 void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
173 {
174 if (status)
175 sc->debug.stats.istats.total++;
176 if (status & ATH9K_INT_RX)
177 sc->debug.stats.istats.rxok++;
178 if (status & ATH9K_INT_RXEOL)
179 sc->debug.stats.istats.rxeol++;
180 if (status & ATH9K_INT_RXORN)
181 sc->debug.stats.istats.rxorn++;
182 if (status & ATH9K_INT_TX)
183 sc->debug.stats.istats.txok++;
184 if (status & ATH9K_INT_TXURN)
185 sc->debug.stats.istats.txurn++;
186 if (status & ATH9K_INT_MIB)
187 sc->debug.stats.istats.mib++;
188 if (status & ATH9K_INT_RXPHY)
189 sc->debug.stats.istats.rxphyerr++;
190 if (status & ATH9K_INT_RXKCM)
191 sc->debug.stats.istats.rx_keycache_miss++;
192 if (status & ATH9K_INT_SWBA)
193 sc->debug.stats.istats.swba++;
194 if (status & ATH9K_INT_BMISS)
195 sc->debug.stats.istats.bmiss++;
196 if (status & ATH9K_INT_BNR)
197 sc->debug.stats.istats.bnr++;
198 if (status & ATH9K_INT_CST)
199 sc->debug.stats.istats.cst++;
200 if (status & ATH9K_INT_GTT)
201 sc->debug.stats.istats.gtt++;
202 if (status & ATH9K_INT_TIM)
203 sc->debug.stats.istats.tim++;
204 if (status & ATH9K_INT_CABEND)
205 sc->debug.stats.istats.cabend++;
206 if (status & ATH9K_INT_DTIMSYNC)
207 sc->debug.stats.istats.dtimsync++;
208 if (status & ATH9K_INT_DTIM)
209 sc->debug.stats.istats.dtim++;
210 }
211
212 static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
213 size_t count, loff_t *ppos)
214 {
215 struct ath_softc *sc = file->private_data;
216 char buf[512];
217 unsigned int len = 0;
218
219 len += snprintf(buf + len, sizeof(buf) - len,
220 "%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
221 len += snprintf(buf + len, sizeof(buf) - len,
222 "%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
223 len += snprintf(buf + len, sizeof(buf) - len,
224 "%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
225 len += snprintf(buf + len, sizeof(buf) - len,
226 "%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
227 len += snprintf(buf + len, sizeof(buf) - len,
228 "%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
229 len += snprintf(buf + len, sizeof(buf) - len,
230 "%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
231 len += snprintf(buf + len, sizeof(buf) - len,
232 "%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
233 len += snprintf(buf + len, sizeof(buf) - len,
234 "%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
235 len += snprintf(buf + len, sizeof(buf) - len,
236 "%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
237 len += snprintf(buf + len, sizeof(buf) - len,
238 "%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
239 len += snprintf(buf + len, sizeof(buf) - len,
240 "%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
241 len += snprintf(buf + len, sizeof(buf) - len,
242 "%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
243 len += snprintf(buf + len, sizeof(buf) - len,
244 "%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
245 len += snprintf(buf + len, sizeof(buf) - len,
246 "%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
247 len += snprintf(buf + len, sizeof(buf) - len,
248 "%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
249 len += snprintf(buf + len, sizeof(buf) - len,
250 "%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
251 len += snprintf(buf + len, sizeof(buf) - len,
252 "%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
253 len += snprintf(buf + len, sizeof(buf) - len,
254 "%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
255
256 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
257 }
258
259 static const struct file_operations fops_interrupt = {
260 .read = read_file_interrupt,
261 .open = ath9k_debugfs_open,
262 .owner = THIS_MODULE
263 };
264
265 void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
266 {
267 struct ath_tx_info_priv *tx_info_priv = NULL;
268 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
269 struct ieee80211_tx_rate *rates = tx_info->status.rates;
270 int final_ts_idx, idx;
271 struct ath_rc_stats *stats;
272
273 tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
274 final_ts_idx = tx_info_priv->tx.ts_rateindex;
275 idx = rates[final_ts_idx].idx;
276 stats = &sc->debug.stats.rcstats[idx];
277 stats->success++;
278 }
279
280 void ath_debug_stat_retries(struct ath_softc *sc, int rix,
281 int xretries, int retries, u8 per)
282 {
283 struct ath_rc_stats *stats = &sc->debug.stats.rcstats[rix];
284
285 stats->xretries += xretries;
286 stats->retries += retries;
287 stats->per = per;
288 }
289
290 static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
291 size_t count, loff_t *ppos)
292 {
293 struct ath_softc *sc = file->private_data;
294 char *buf;
295 unsigned int len = 0, max;
296 int i = 0;
297 ssize_t retval;
298
299 if (sc->cur_rate_table == NULL)
300 return 0;
301
302 max = 80 + sc->cur_rate_table->rate_cnt * 64;
303 buf = kmalloc(max + 1, GFP_KERNEL);
304 if (buf == NULL)
305 return 0;
306 buf[max] = 0;
307
308 len += sprintf(buf, "%5s %15s %8s %9s %3s\n\n", "Rate", "Success",
309 "Retries", "XRetries", "PER");
310
311 for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
312 u32 ratekbps = sc->cur_rate_table->info[i].ratekbps;
313 struct ath_rc_stats *stats = &sc->debug.stats.rcstats[i];
314
315 len += snprintf(buf + len, max - len,
316 "%3u.%d: %8u %8u %8u %8u\n", ratekbps / 1000,
317 (ratekbps % 1000) / 100, stats->success,
318 stats->retries, stats->xretries,
319 stats->per);
320 }
321
322 retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
323 kfree(buf);
324 return retval;
325 }
326
327 static const struct file_operations fops_rcstat = {
328 .read = read_file_rcstat,
329 .open = ath9k_debugfs_open,
330 .owner = THIS_MODULE
331 };
332
333 static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
334 {
335 switch (state) {
336 case ATH_WIPHY_INACTIVE:
337 return "INACTIVE";
338 case ATH_WIPHY_ACTIVE:
339 return "ACTIVE";
340 case ATH_WIPHY_PAUSING:
341 return "PAUSING";
342 case ATH_WIPHY_PAUSED:
343 return "PAUSED";
344 case ATH_WIPHY_SCAN:
345 return "SCAN";
346 }
347 return "?";
348 }
349
350 static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
351 size_t count, loff_t *ppos)
352 {
353 struct ath_softc *sc = file->private_data;
354 char buf[512];
355 unsigned int len = 0;
356 int i;
357 u8 addr[ETH_ALEN];
358
359 len += snprintf(buf + len, sizeof(buf) - len,
360 "primary: %s (%s chan=%d ht=%d)\n",
361 wiphy_name(sc->pri_wiphy->hw->wiphy),
362 ath_wiphy_state_str(sc->pri_wiphy->state),
363 sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
364 for (i = 0; i < sc->num_sec_wiphy; i++) {
365 struct ath_wiphy *aphy = sc->sec_wiphy[i];
366 if (aphy == NULL)
367 continue;
368 len += snprintf(buf + len, sizeof(buf) - len,
369 "secondary: %s (%s chan=%d ht=%d)\n",
370 wiphy_name(aphy->hw->wiphy),
371 ath_wiphy_state_str(aphy->state),
372 aphy->chan_idx, aphy->chan_is_ht);
373 }
374
375 put_unaligned_le32(REG_READ(sc->sc_ah, AR_STA_ID0), addr);
376 put_unaligned_le16(REG_READ(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
377 len += snprintf(buf + len, sizeof(buf) - len,
378 "addr: %pM\n", addr);
379 put_unaligned_le32(REG_READ(sc->sc_ah, AR_BSSMSKL), addr);
380 put_unaligned_le16(REG_READ(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
381 len += snprintf(buf + len, sizeof(buf) - len,
382 "addrmask: %pM\n", addr);
383
384 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
385 }
386
387 static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
388 {
389 int i;
390 if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
391 return sc->pri_wiphy;
392 for (i = 0; i < sc->num_sec_wiphy; i++) {
393 struct ath_wiphy *aphy = sc->sec_wiphy[i];
394 if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
395 return aphy;
396 }
397 return NULL;
398 }
399
400 static int del_wiphy(struct ath_softc *sc, const char *name)
401 {
402 struct ath_wiphy *aphy = get_wiphy(sc, name);
403 if (!aphy)
404 return -ENOENT;
405 return ath9k_wiphy_del(aphy);
406 }
407
408 static int pause_wiphy(struct ath_softc *sc, const char *name)
409 {
410 struct ath_wiphy *aphy = get_wiphy(sc, name);
411 if (!aphy)
412 return -ENOENT;
413 return ath9k_wiphy_pause(aphy);
414 }
415
416 static int unpause_wiphy(struct ath_softc *sc, const char *name)
417 {
418 struct ath_wiphy *aphy = get_wiphy(sc, name);
419 if (!aphy)
420 return -ENOENT;
421 return ath9k_wiphy_unpause(aphy);
422 }
423
424 static int select_wiphy(struct ath_softc *sc, const char *name)
425 {
426 struct ath_wiphy *aphy = get_wiphy(sc, name);
427 if (!aphy)
428 return -ENOENT;
429 return ath9k_wiphy_select(aphy);
430 }
431
432 static int schedule_wiphy(struct ath_softc *sc, const char *msec)
433 {
434 ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
435 return 0;
436 }
437
438 static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
439 size_t count, loff_t *ppos)
440 {
441 struct ath_softc *sc = file->private_data;
442 char buf[50];
443 size_t len;
444
445 len = min(count, sizeof(buf) - 1);
446 if (copy_from_user(buf, user_buf, len))
447 return -EFAULT;
448 buf[len] = '\0';
449 if (len > 0 && buf[len - 1] == '\n')
450 buf[len - 1] = '\0';
451
452 if (strncmp(buf, "add", 3) == 0) {
453 int res = ath9k_wiphy_add(sc);
454 if (res < 0)
455 return res;
456 } else if (strncmp(buf, "del=", 4) == 0) {
457 int res = del_wiphy(sc, buf + 4);
458 if (res < 0)
459 return res;
460 } else if (strncmp(buf, "pause=", 6) == 0) {
461 int res = pause_wiphy(sc, buf + 6);
462 if (res < 0)
463 return res;
464 } else if (strncmp(buf, "unpause=", 8) == 0) {
465 int res = unpause_wiphy(sc, buf + 8);
466 if (res < 0)
467 return res;
468 } else if (strncmp(buf, "select=", 7) == 0) {
469 int res = select_wiphy(sc, buf + 7);
470 if (res < 0)
471 return res;
472 } else if (strncmp(buf, "schedule=", 9) == 0) {
473 int res = schedule_wiphy(sc, buf + 9);
474 if (res < 0)
475 return res;
476 } else
477 return -EOPNOTSUPP;
478
479 return count;
480 }
481
482 static const struct file_operations fops_wiphy = {
483 .read = read_file_wiphy,
484 .write = write_file_wiphy,
485 .open = ath9k_debugfs_open,
486 .owner = THIS_MODULE
487 };
488
489
490 int ath9k_init_debug(struct ath_softc *sc)
491 {
492 sc->debug.debug_mask = ath9k_debug;
493
494 if (!ath9k_debugfs_root)
495 return -ENOENT;
496
497 sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
498 ath9k_debugfs_root);
499 if (!sc->debug.debugfs_phy)
500 goto err;
501
502 sc->debug.debugfs_debug = debugfs_create_file("debug",
503 S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc, &fops_debug);
504 if (!sc->debug.debugfs_debug)
505 goto err;
506
507 sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
508 sc->debug.debugfs_phy, sc, &fops_dma);
509 if (!sc->debug.debugfs_dma)
510 goto err;
511
512 sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
513 S_IRUGO,
514 sc->debug.debugfs_phy,
515 sc, &fops_interrupt);
516 if (!sc->debug.debugfs_interrupt)
517 goto err;
518
519 sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
520 S_IRUGO,
521 sc->debug.debugfs_phy,
522 sc, &fops_rcstat);
523 if (!sc->debug.debugfs_rcstat)
524 goto err;
525
526 sc->debug.debugfs_wiphy = debugfs_create_file(
527 "wiphy", S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc,
528 &fops_wiphy);
529 if (!sc->debug.debugfs_wiphy)
530 goto err;
531
532 return 0;
533 err:
534 ath9k_exit_debug(sc);
535 return -ENOMEM;
536 }
537
538 void ath9k_exit_debug(struct ath_softc *sc)
539 {
540 debugfs_remove(sc->debug.debugfs_wiphy);
541 debugfs_remove(sc->debug.debugfs_rcstat);
542 debugfs_remove(sc->debug.debugfs_interrupt);
543 debugfs_remove(sc->debug.debugfs_dma);
544 debugfs_remove(sc->debug.debugfs_debug);
545 debugfs_remove(sc->debug.debugfs_phy);
546 }
547
548 int ath9k_debug_create_root(void)
549 {
550 ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
551 if (!ath9k_debugfs_root)
552 return -ENOENT;
553
554 return 0;
555 }
556
557 void ath9k_debug_remove_root(void)
558 {
559 debugfs_remove(ath9k_debugfs_root);
560 ath9k_debugfs_root = NULL;
561 }
562
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