tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
21static unsigned int ath9k_debug = DBG_DEFAULT;
22module_param_named(debug, ath9k_debug, uint, 0);
23
24static struct dentry *ath9k_debugfs_root;
25
26void 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
41static int ath9k_debugfs_open(struct inode *inode, struct file *file)
42{
43 file->private_data = inode->i_private;
44 return 0;
45}
46
47static ssize_t read_file_dma(struct file *file, char __user *user_buf,
48 size_t count, loff_t *ppos)
49{
50 struct ath_softc *sc = file->private_data;
51 struct ath_hw *ah = sc->sc_ah;
52 char buf[1024];
53 unsigned int len = 0;
54 u32 val[ATH9K_NUM_DMA_DEBUG_REGS];
55 int i, qcuOffset = 0, dcuOffset = 0;
56 u32 *qcuBase = &val[0], *dcuBase = &val[4];
57
58 REG_WRITE(ah, AR_MACMISC,
59 ((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
60 (AR_MACMISC_MISC_OBS_BUS_1 <<
61 AR_MACMISC_MISC_OBS_BUS_MSB_S)));
62
63 len += snprintf(buf + len, sizeof(buf) - len,
64 "Raw DMA Debug values:\n");
65
66 for (i = 0; i < ATH9K_NUM_DMA_DEBUG_REGS; i++) {
67 if (i % 4 == 0)
68 len += snprintf(buf + len, sizeof(buf) - len, "\n");
69
70 val[i] = REG_READ(ah, AR_DMADBG_0 + (i * sizeof(u32)));
71 len += snprintf(buf + len, sizeof(buf) - len, "%d: %08x ",
72 i, val[i]);
73 }
74
75 len += snprintf(buf + len, sizeof(buf) - len, "\n\n");
76 len += snprintf(buf + len, sizeof(buf) - len,
77 "Num QCU: chain_st fsp_ok fsp_st DCU: chain_st\n");
78
79 for (i = 0; i < ATH9K_NUM_QUEUES; i++, qcuOffset += 4, dcuOffset += 5) {
80 if (i == 8) {
81 qcuOffset = 0;
82 qcuBase++;
83 }
84
85 if (i == 6) {
86 dcuOffset = 0;
87 dcuBase++;
88 }
89
90 len += snprintf(buf + len, sizeof(buf) - len,
91 "%2d %2x %1x %2x %2x\n",
92 i, (*qcuBase & (0x7 << qcuOffset)) >> qcuOffset,
93 (*qcuBase & (0x8 << qcuOffset)) >> (qcuOffset + 3),
94 val[2] & (0x7 << (i * 3)) >> (i * 3),
95 (*dcuBase & (0x1f << dcuOffset)) >> dcuOffset);
96 }
97
98 len += snprintf(buf + len, sizeof(buf) - len, "\n");
99
100 len += snprintf(buf + len, sizeof(buf) - len,
101 "qcu_stitch state: %2x qcu_fetch state: %2x\n",
102 (val[3] & 0x003c0000) >> 18, (val[3] & 0x03c00000) >> 22);
103 len += snprintf(buf + len, sizeof(buf) - len,
104 "qcu_complete state: %2x dcu_complete state: %2x\n",
105 (val[3] & 0x1c000000) >> 26, (val[6] & 0x3));
106 len += snprintf(buf + len, sizeof(buf) - len,
107 "dcu_arb state: %2x dcu_fp state: %2x\n",
108 (val[5] & 0x06000000) >> 25, (val[5] & 0x38000000) >> 27);
109 len += snprintf(buf + len, sizeof(buf) - len,
110 "chan_idle_dur: %3d chan_idle_dur_valid: %1d\n",
111 (val[6] & 0x000003fc) >> 2, (val[6] & 0x00000400) >> 10);
112 len += snprintf(buf + len, sizeof(buf) - len,
113 "txfifo_valid_0: %1d txfifo_valid_1: %1d\n",
114 (val[6] & 0x00000800) >> 11, (val[6] & 0x00001000) >> 12);
115 len += snprintf(buf + len, sizeof(buf) - len,
116 "txfifo_dcu_num_0: %2d txfifo_dcu_num_1: %2d\n",
117 (val[6] & 0x0001e000) >> 13, (val[6] & 0x001e0000) >> 17);
118
119 len += snprintf(buf + len, sizeof(buf) - len, "pcu observe: 0x%x \n",
120 REG_READ(ah, AR_OBS_BUS_1));
121 len += snprintf(buf + len, sizeof(buf) - len,
122 "AR_CR: 0x%x \n", REG_READ(ah, AR_CR));
123
124 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
125}
126
127static const struct file_operations fops_dma = {
128 .read = read_file_dma,
129 .open = ath9k_debugfs_open,
130 .owner = THIS_MODULE
131};
132
133
134void ath_debug_stat_interrupt(struct ath_softc *sc, enum ath9k_int status)
135{
136 if (status)
137 sc->debug.stats.istats.total++;
138 if (status & ATH9K_INT_RX)
139 sc->debug.stats.istats.rxok++;
140 if (status & ATH9K_INT_RXEOL)
141 sc->debug.stats.istats.rxeol++;
142 if (status & ATH9K_INT_RXORN)
143 sc->debug.stats.istats.rxorn++;
144 if (status & ATH9K_INT_TX)
145 sc->debug.stats.istats.txok++;
146 if (status & ATH9K_INT_TXURN)
147 sc->debug.stats.istats.txurn++;
148 if (status & ATH9K_INT_MIB)
149 sc->debug.stats.istats.mib++;
150 if (status & ATH9K_INT_RXPHY)
151 sc->debug.stats.istats.rxphyerr++;
152 if (status & ATH9K_INT_RXKCM)
153 sc->debug.stats.istats.rx_keycache_miss++;
154 if (status & ATH9K_INT_SWBA)
155 sc->debug.stats.istats.swba++;
156 if (status & ATH9K_INT_BMISS)
157 sc->debug.stats.istats.bmiss++;
158 if (status & ATH9K_INT_BNR)
159 sc->debug.stats.istats.bnr++;
160 if (status & ATH9K_INT_CST)
161 sc->debug.stats.istats.cst++;
162 if (status & ATH9K_INT_GTT)
163 sc->debug.stats.istats.gtt++;
164 if (status & ATH9K_INT_TIM)
165 sc->debug.stats.istats.tim++;
166 if (status & ATH9K_INT_CABEND)
167 sc->debug.stats.istats.cabend++;
168 if (status & ATH9K_INT_DTIMSYNC)
169 sc->debug.stats.istats.dtimsync++;
170 if (status & ATH9K_INT_DTIM)
171 sc->debug.stats.istats.dtim++;
172}
173
174static ssize_t read_file_interrupt(struct file *file, char __user *user_buf,
175 size_t count, loff_t *ppos)
176{
177 struct ath_softc *sc = file->private_data;
178 char buf[512];
179 unsigned int len = 0;
180
181 len += snprintf(buf + len, sizeof(buf) - len,
182 "%8s: %10u\n", "RX", sc->debug.stats.istats.rxok);
183 len += snprintf(buf + len, sizeof(buf) - len,
184 "%8s: %10u\n", "RXEOL", sc->debug.stats.istats.rxeol);
185 len += snprintf(buf + len, sizeof(buf) - len,
186 "%8s: %10u\n", "RXORN", sc->debug.stats.istats.rxorn);
187 len += snprintf(buf + len, sizeof(buf) - len,
188 "%8s: %10u\n", "TX", sc->debug.stats.istats.txok);
189 len += snprintf(buf + len, sizeof(buf) - len,
190 "%8s: %10u\n", "TXURN", sc->debug.stats.istats.txurn);
191 len += snprintf(buf + len, sizeof(buf) - len,
192 "%8s: %10u\n", "MIB", sc->debug.stats.istats.mib);
193 len += snprintf(buf + len, sizeof(buf) - len,
194 "%8s: %10u\n", "RXPHY", sc->debug.stats.istats.rxphyerr);
195 len += snprintf(buf + len, sizeof(buf) - len,
196 "%8s: %10u\n", "RXKCM", sc->debug.stats.istats.rx_keycache_miss);
197 len += snprintf(buf + len, sizeof(buf) - len,
198 "%8s: %10u\n", "SWBA", sc->debug.stats.istats.swba);
199 len += snprintf(buf + len, sizeof(buf) - len,
200 "%8s: %10u\n", "BMISS", sc->debug.stats.istats.bmiss);
201 len += snprintf(buf + len, sizeof(buf) - len,
202 "%8s: %10u\n", "BNR", sc->debug.stats.istats.bnr);
203 len += snprintf(buf + len, sizeof(buf) - len,
204 "%8s: %10u\n", "CST", sc->debug.stats.istats.cst);
205 len += snprintf(buf + len, sizeof(buf) - len,
206 "%8s: %10u\n", "GTT", sc->debug.stats.istats.gtt);
207 len += snprintf(buf + len, sizeof(buf) - len,
208 "%8s: %10u\n", "TIM", sc->debug.stats.istats.tim);
209 len += snprintf(buf + len, sizeof(buf) - len,
210 "%8s: %10u\n", "CABEND", sc->debug.stats.istats.cabend);
211 len += snprintf(buf + len, sizeof(buf) - len,
212 "%8s: %10u\n", "DTIMSYNC", sc->debug.stats.istats.dtimsync);
213 len += snprintf(buf + len, sizeof(buf) - len,
214 "%8s: %10u\n", "DTIM", sc->debug.stats.istats.dtim);
215 len += snprintf(buf + len, sizeof(buf) - len,
216 "%8s: %10u\n", "TOTAL", sc->debug.stats.istats.total);
217
218 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
219}
220
221static const struct file_operations fops_interrupt = {
222 .read = read_file_interrupt,
223 .open = ath9k_debugfs_open,
224 .owner = THIS_MODULE
225};
226
227static void ath_debug_stat_11n_rc(struct ath_softc *sc, struct sk_buff *skb)
228{
229 struct ath_tx_info_priv *tx_info_priv = NULL;
230 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
231 struct ieee80211_tx_rate *rates = tx_info->status.rates;
232 int final_ts_idx, idx;
233
234 tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
235 final_ts_idx = tx_info_priv->tx.ts_rateindex;
236 idx = sc->cur_rate_table->info[rates[final_ts_idx].idx].dot11rate;
237
238 sc->debug.stats.n_rcstats[idx].success++;
239}
240
241static void ath_debug_stat_legacy_rc(struct ath_softc *sc, struct sk_buff *skb)
242{
243 struct ath_tx_info_priv *tx_info_priv = NULL;
244 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
245 struct ieee80211_tx_rate *rates = tx_info->status.rates;
246 int final_ts_idx, idx;
247
248 tx_info_priv = ATH_TX_INFO_PRIV(tx_info);
249 final_ts_idx = tx_info_priv->tx.ts_rateindex;
250 idx = rates[final_ts_idx].idx;
251
252 sc->debug.stats.legacy_rcstats[idx].success++;
253}
254
255void ath_debug_stat_rc(struct ath_softc *sc, struct sk_buff *skb)
256{
257 if (conf_is_ht(&sc->hw->conf))
258 ath_debug_stat_11n_rc(sc, skb);
259 else
260 ath_debug_stat_legacy_rc(sc, skb);
261}
262
263/* FIXME: legacy rates, later on .. */
264void ath_debug_stat_retries(struct ath_softc *sc, int rix,
265 int xretries, int retries, u8 per)
266{
267 if (conf_is_ht(&sc->hw->conf)) {
268 int idx = sc->cur_rate_table->info[rix].dot11rate;
269
270 sc->debug.stats.n_rcstats[idx].xretries += xretries;
271 sc->debug.stats.n_rcstats[idx].retries += retries;
272 sc->debug.stats.n_rcstats[idx].per = per;
273 }
274}
275
276static ssize_t ath_read_file_stat_11n_rc(struct file *file,
277 char __user *user_buf,
278 size_t count, loff_t *ppos)
279{
280 struct ath_softc *sc = file->private_data;
281 char buf[1024];
282 unsigned int len = 0;
283 int i = 0;
284
285 len += sprintf(buf, "%7s %13s %8s %8s %6s\n\n", "Rate", "Success",
286 "Retries", "XRetries", "PER");
287
288 for (i = 0; i <= 15; i++) {
289 len += snprintf(buf + len, sizeof(buf) - len,
290 "%5s%3d: %8u %8u %8u %8u\n", "MCS", i,
291 sc->debug.stats.n_rcstats[i].success,
292 sc->debug.stats.n_rcstats[i].retries,
293 sc->debug.stats.n_rcstats[i].xretries,
294 sc->debug.stats.n_rcstats[i].per);
295 }
296
297 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
298}
299
300static ssize_t ath_read_file_stat_legacy_rc(struct file *file,
301 char __user *user_buf,
302 size_t count, loff_t *ppos)
303{
304 struct ath_softc *sc = file->private_data;
305 char buf[512];
306 unsigned int len = 0;
307 int i = 0;
308
309 len += sprintf(buf, "%7s %13s\n\n", "Rate", "Success");
310
311 for (i = 0; i < sc->cur_rate_table->rate_cnt; i++) {
312 len += snprintf(buf + len, sizeof(buf) - len, "%5u: %12u\n",
313 sc->cur_rate_table->info[i].ratekbps / 1000,
314 sc->debug.stats.legacy_rcstats[i].success);
315 }
316
317 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
318}
319
320static ssize_t read_file_rcstat(struct file *file, char __user *user_buf,
321 size_t count, loff_t *ppos)
322{
323 struct ath_softc *sc = file->private_data;
324
325 if (sc->cur_rate_table == NULL)
326 return 0;
327
328 if (conf_is_ht(&sc->hw->conf))
329 return ath_read_file_stat_11n_rc(file, user_buf, count, ppos);
330 else
331 return ath_read_file_stat_legacy_rc(file, user_buf, count ,ppos);
332}
333
334static const struct file_operations fops_rcstat = {
335 .read = read_file_rcstat,
336 .open = ath9k_debugfs_open,
337 .owner = THIS_MODULE
338};
339
340static const char * ath_wiphy_state_str(enum ath_wiphy_state state)
341{
342 switch (state) {
343 case ATH_WIPHY_INACTIVE:
344 return "INACTIVE";
345 case ATH_WIPHY_ACTIVE:
346 return "ACTIVE";
347 case ATH_WIPHY_PAUSING:
348 return "PAUSING";
349 case ATH_WIPHY_PAUSED:
350 return "PAUSED";
351 case ATH_WIPHY_SCAN:
352 return "SCAN";
353 }
354 return "?";
355}
356
357static ssize_t read_file_wiphy(struct file *file, char __user *user_buf,
358 size_t count, loff_t *ppos)
359{
360 struct ath_softc *sc = file->private_data;
361 char buf[512];
362 unsigned int len = 0;
363 int i;
364 u8 addr[ETH_ALEN];
365
366 len += snprintf(buf + len, sizeof(buf) - len,
367 "primary: %s (%s chan=%d ht=%d)\n",
368 wiphy_name(sc->pri_wiphy->hw->wiphy),
369 ath_wiphy_state_str(sc->pri_wiphy->state),
370 sc->pri_wiphy->chan_idx, sc->pri_wiphy->chan_is_ht);
371 for (i = 0; i < sc->num_sec_wiphy; i++) {
372 struct ath_wiphy *aphy = sc->sec_wiphy[i];
373 if (aphy == NULL)
374 continue;
375 len += snprintf(buf + len, sizeof(buf) - len,
376 "secondary: %s (%s chan=%d ht=%d)\n",
377 wiphy_name(aphy->hw->wiphy),
378 ath_wiphy_state_str(aphy->state),
379 aphy->chan_idx, aphy->chan_is_ht);
380 }
381
382 put_unaligned_le32(REG_READ(sc->sc_ah, AR_STA_ID0), addr);
383 put_unaligned_le16(REG_READ(sc->sc_ah, AR_STA_ID1) & 0xffff, addr + 4);
384 len += snprintf(buf + len, sizeof(buf) - len,
385 "addr: %pM\n", addr);
386 put_unaligned_le32(REG_READ(sc->sc_ah, AR_BSSMSKL), addr);
387 put_unaligned_le16(REG_READ(sc->sc_ah, AR_BSSMSKU) & 0xffff, addr + 4);
388 len += snprintf(buf + len, sizeof(buf) - len,
389 "addrmask: %pM\n", addr);
390
391 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
392}
393
394static struct ath_wiphy * get_wiphy(struct ath_softc *sc, const char *name)
395{
396 int i;
397 if (strcmp(name, wiphy_name(sc->pri_wiphy->hw->wiphy)) == 0)
398 return sc->pri_wiphy;
399 for (i = 0; i < sc->num_sec_wiphy; i++) {
400 struct ath_wiphy *aphy = sc->sec_wiphy[i];
401 if (aphy && strcmp(name, wiphy_name(aphy->hw->wiphy)) == 0)
402 return aphy;
403 }
404 return NULL;
405}
406
407static int del_wiphy(struct ath_softc *sc, const char *name)
408{
409 struct ath_wiphy *aphy = get_wiphy(sc, name);
410 if (!aphy)
411 return -ENOENT;
412 return ath9k_wiphy_del(aphy);
413}
414
415static int pause_wiphy(struct ath_softc *sc, const char *name)
416{
417 struct ath_wiphy *aphy = get_wiphy(sc, name);
418 if (!aphy)
419 return -ENOENT;
420 return ath9k_wiphy_pause(aphy);
421}
422
423static int unpause_wiphy(struct ath_softc *sc, const char *name)
424{
425 struct ath_wiphy *aphy = get_wiphy(sc, name);
426 if (!aphy)
427 return -ENOENT;
428 return ath9k_wiphy_unpause(aphy);
429}
430
431static int select_wiphy(struct ath_softc *sc, const char *name)
432{
433 struct ath_wiphy *aphy = get_wiphy(sc, name);
434 if (!aphy)
435 return -ENOENT;
436 return ath9k_wiphy_select(aphy);
437}
438
439static int schedule_wiphy(struct ath_softc *sc, const char *msec)
440{
441 ath9k_wiphy_set_scheduler(sc, simple_strtoul(msec, NULL, 0));
442 return 0;
443}
444
445static ssize_t write_file_wiphy(struct file *file, const char __user *user_buf,
446 size_t count, loff_t *ppos)
447{
448 struct ath_softc *sc = file->private_data;
449 char buf[50];
450 size_t len;
451
452 len = min(count, sizeof(buf) - 1);
453 if (copy_from_user(buf, user_buf, len))
454 return -EFAULT;
455 buf[len] = '\0';
456 if (len > 0 && buf[len - 1] == '\n')
457 buf[len - 1] = '\0';
458
459 if (strncmp(buf, "add", 3) == 0) {
460 int res = ath9k_wiphy_add(sc);
461 if (res < 0)
462 return res;
463 } else if (strncmp(buf, "del=", 4) == 0) {
464 int res = del_wiphy(sc, buf + 4);
465 if (res < 0)
466 return res;
467 } else if (strncmp(buf, "pause=", 6) == 0) {
468 int res = pause_wiphy(sc, buf + 6);
469 if (res < 0)
470 return res;
471 } else if (strncmp(buf, "unpause=", 8) == 0) {
472 int res = unpause_wiphy(sc, buf + 8);
473 if (res < 0)
474 return res;
475 } else if (strncmp(buf, "select=", 7) == 0) {
476 int res = select_wiphy(sc, buf + 7);
477 if (res < 0)
478 return res;
479 } else if (strncmp(buf, "schedule=", 9) == 0) {
480 int res = schedule_wiphy(sc, buf + 9);
481 if (res < 0)
482 return res;
483 } else
484 return -EOPNOTSUPP;
485
486 return count;
487}
488
489static const struct file_operations fops_wiphy = {
490 .read = read_file_wiphy,
491 .write = write_file_wiphy,
492 .open = ath9k_debugfs_open,
493 .owner = THIS_MODULE
494};
495
496
497int ath9k_init_debug(struct ath_softc *sc)
498{
499 sc->debug.debug_mask = ath9k_debug;
500
501 sc->debug.debugfs_phy = debugfs_create_dir(wiphy_name(sc->hw->wiphy),
502 ath9k_debugfs_root);
503 if (!sc->debug.debugfs_phy)
504 goto err;
505
506 sc->debug.debugfs_dma = debugfs_create_file("dma", S_IRUGO,
507 sc->debug.debugfs_phy, sc, &fops_dma);
508 if (!sc->debug.debugfs_dma)
509 goto err;
510
511 sc->debug.debugfs_interrupt = debugfs_create_file("interrupt",
512 S_IRUGO,
513 sc->debug.debugfs_phy,
514 sc, &fops_interrupt);
515 if (!sc->debug.debugfs_interrupt)
516 goto err;
517
518 sc->debug.debugfs_rcstat = debugfs_create_file("rcstat",
519 S_IRUGO,
520 sc->debug.debugfs_phy,
521 sc, &fops_rcstat);
522 if (!sc->debug.debugfs_rcstat)
523 goto err;
524
525 sc->debug.debugfs_wiphy = debugfs_create_file(
526 "wiphy", S_IRUGO | S_IWUSR, sc->debug.debugfs_phy, sc,
527 &fops_wiphy);
528 if (!sc->debug.debugfs_wiphy)
529 goto err;
530
531 return 0;
532err:
533 ath9k_exit_debug(sc);
534 return -ENOMEM;
535}
536
537void ath9k_exit_debug(struct ath_softc *sc)
538{
539 debugfs_remove(sc->debug.debugfs_wiphy);
540 debugfs_remove(sc->debug.debugfs_rcstat);
541 debugfs_remove(sc->debug.debugfs_interrupt);
542 debugfs_remove(sc->debug.debugfs_dma);
543 debugfs_remove(sc->debug.debugfs_phy);
544}
545
546int ath9k_debug_create_root(void)
547{
548 ath9k_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
549 if (!ath9k_debugfs_root)
550 return -ENOENT;
551
552 return 0;
553}
554
555void ath9k_debug_remove_root(void)
556{
557 debugfs_remove(ath9k_debugfs_root);
558 ath9k_debugfs_root = NULL;
559}