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usb: make "nousb" a clear module parameter
[deliverable/linux.git] / drivers / usb / host / ehci-dbg.c
1 /*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 #ifdef CONFIG_DYNAMIC_DEBUG
22
23 /* check the values in the HCSPARAMS register
24 * (host controller _Structural_ parameters)
25 * see EHCI spec, Table 2-4 for each value
26 */
27 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
28 {
29 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
30
31 ehci_dbg (ehci,
32 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
33 label, params,
34 HCS_DEBUG_PORT (params),
35 HCS_INDICATOR (params) ? " ind" : "",
36 HCS_N_CC (params),
37 HCS_N_PCC (params),
38 HCS_PORTROUTED (params) ? "" : " ordered",
39 HCS_PPC (params) ? "" : " !ppc",
40 HCS_N_PORTS (params)
41 );
42 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
43 if (HCS_PORTROUTED (params)) {
44 int i;
45 char buf [46], tmp [7], byte;
46
47 buf[0] = 0;
48 for (i = 0; i < HCS_N_PORTS (params); i++) {
49 // FIXME MIPS won't readb() ...
50 byte = readb (&ehci->caps->portroute[(i>>1)]);
51 sprintf(tmp, "%d ",
52 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
53 strcat(buf, tmp);
54 }
55 ehci_dbg (ehci, "%s portroute %s\n",
56 label, buf);
57 }
58 }
59 #else
60
61 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
62
63 #endif
64
65 #ifdef CONFIG_DYNAMIC_DEBUG
66
67 /* check the values in the HCCPARAMS register
68 * (host controller _Capability_ parameters)
69 * see EHCI Spec, Table 2-5 for each value
70 * */
71 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
72 {
73 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
74
75 if (HCC_ISOC_CACHE (params)) {
76 ehci_dbg (ehci,
77 "%s hcc_params %04x caching frame %s%s%s\n",
78 label, params,
79 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
80 HCC_CANPARK(params) ? " park" : "",
81 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
82 } else {
83 ehci_dbg (ehci,
84 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
85 label,
86 params,
87 HCC_ISOC_THRES(params),
88 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
89 HCC_CANPARK(params) ? " park" : "",
90 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
91 HCC_LPM(params) ? " LPM" : "",
92 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
93 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
94 HCC_32FRAME_PERIODIC_LIST(params) ?
95 " 32 periodic list" : "");
96 }
97 }
98 #else
99
100 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
101
102 #endif
103
104 #ifdef CONFIG_DYNAMIC_DEBUG
105
106 static void __maybe_unused
107 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
108 {
109 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
110 hc32_to_cpup(ehci, &qtd->hw_next),
111 hc32_to_cpup(ehci, &qtd->hw_alt_next),
112 hc32_to_cpup(ehci, &qtd->hw_token),
113 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
114 if (qtd->hw_buf [1])
115 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
116 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
117 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
118 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
119 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
120 }
121
122 static void __maybe_unused
123 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
124 {
125 struct ehci_qh_hw *hw = qh->hw;
126
127 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
128 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
129 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
130 }
131
132 static void __maybe_unused
133 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
134 {
135 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
136 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
137 itd->urb);
138 ehci_dbg (ehci,
139 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
140 hc32_to_cpu(ehci, itd->hw_transaction[0]),
141 hc32_to_cpu(ehci, itd->hw_transaction[1]),
142 hc32_to_cpu(ehci, itd->hw_transaction[2]),
143 hc32_to_cpu(ehci, itd->hw_transaction[3]),
144 hc32_to_cpu(ehci, itd->hw_transaction[4]),
145 hc32_to_cpu(ehci, itd->hw_transaction[5]),
146 hc32_to_cpu(ehci, itd->hw_transaction[6]),
147 hc32_to_cpu(ehci, itd->hw_transaction[7]));
148 ehci_dbg (ehci,
149 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
150 hc32_to_cpu(ehci, itd->hw_bufp[0]),
151 hc32_to_cpu(ehci, itd->hw_bufp[1]),
152 hc32_to_cpu(ehci, itd->hw_bufp[2]),
153 hc32_to_cpu(ehci, itd->hw_bufp[3]),
154 hc32_to_cpu(ehci, itd->hw_bufp[4]),
155 hc32_to_cpu(ehci, itd->hw_bufp[5]),
156 hc32_to_cpu(ehci, itd->hw_bufp[6]));
157 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
158 itd->index[0], itd->index[1], itd->index[2],
159 itd->index[3], itd->index[4], itd->index[5],
160 itd->index[6], itd->index[7]);
161 }
162
163 static void __maybe_unused
164 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
165 {
166 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
167 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
168 sitd->urb);
169 ehci_dbg (ehci,
170 " addr %08x sched %04x result %08x buf %08x %08x\n",
171 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
172 hc32_to_cpu(ehci, sitd->hw_uframe),
173 hc32_to_cpu(ehci, sitd->hw_results),
174 hc32_to_cpu(ehci, sitd->hw_buf[0]),
175 hc32_to_cpu(ehci, sitd->hw_buf[1]));
176 }
177
178 static int __maybe_unused
179 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
180 {
181 return scnprintf (buf, len,
182 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
183 label, label [0] ? " " : "", status,
184 (status & STS_PPCE_MASK) ? " PPCE" : "",
185 (status & STS_ASS) ? " Async" : "",
186 (status & STS_PSS) ? " Periodic" : "",
187 (status & STS_RECL) ? " Recl" : "",
188 (status & STS_HALT) ? " Halt" : "",
189 (status & STS_IAA) ? " IAA" : "",
190 (status & STS_FATAL) ? " FATAL" : "",
191 (status & STS_FLR) ? " FLR" : "",
192 (status & STS_PCD) ? " PCD" : "",
193 (status & STS_ERR) ? " ERR" : "",
194 (status & STS_INT) ? " INT" : ""
195 );
196 }
197
198 static int __maybe_unused
199 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
200 {
201 return scnprintf (buf, len,
202 "%s%sintrenable %02x%s%s%s%s%s%s%s",
203 label, label [0] ? " " : "", enable,
204 (enable & STS_PPCE_MASK) ? " PPCE" : "",
205 (enable & STS_IAA) ? " IAA" : "",
206 (enable & STS_FATAL) ? " FATAL" : "",
207 (enable & STS_FLR) ? " FLR" : "",
208 (enable & STS_PCD) ? " PCD" : "",
209 (enable & STS_ERR) ? " ERR" : "",
210 (enable & STS_INT) ? " INT" : ""
211 );
212 }
213
214 static const char *const fls_strings [] =
215 { "1024", "512", "256", "??" };
216
217 static int
218 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
219 {
220 return scnprintf (buf, len,
221 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
222 "period=%s%s %s",
223 label, label [0] ? " " : "", command,
224 (command & CMD_HIRD) ? " HIRD" : "",
225 (command & CMD_PPCEE) ? " PPCEE" : "",
226 (command & CMD_FSP) ? " FSP" : "",
227 (command & CMD_ASPE) ? " ASPE" : "",
228 (command & CMD_PSPE) ? " PSPE" : "",
229 (command & CMD_PARK) ? " park" : "(park)",
230 CMD_PARK_CNT (command),
231 (command >> 16) & 0x3f,
232 (command & CMD_LRESET) ? " LReset" : "",
233 (command & CMD_IAAD) ? " IAAD" : "",
234 (command & CMD_ASE) ? " Async" : "",
235 (command & CMD_PSE) ? " Periodic" : "",
236 fls_strings [(command >> 2) & 0x3],
237 (command & CMD_RESET) ? " Reset" : "",
238 (command & CMD_RUN) ? "RUN" : "HALT"
239 );
240 }
241
242 static int
243 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
244 {
245 char *sig;
246
247 /* signaling state */
248 switch (status & (3 << 10)) {
249 case 0 << 10: sig = "se0"; break;
250 case 1 << 10: sig = "k"; break; /* low speed */
251 case 2 << 10: sig = "j"; break;
252 default: sig = "?"; break;
253 }
254
255 return scnprintf (buf, len,
256 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
257 "sig=%s%s%s%s%s%s%s%s%s%s%s",
258 label, label [0] ? " " : "", port, status,
259 status>>25,/*device address */
260 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
261 " ACK" : "",
262 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
263 " NYET" : "",
264 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
265 " STALL" : "",
266 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
267 " ERR" : "",
268 (status & PORT_POWER) ? " POWER" : "",
269 (status & PORT_OWNER) ? " OWNER" : "",
270 sig,
271 (status & PORT_LPM) ? " LPM" : "",
272 (status & PORT_RESET) ? " RESET" : "",
273 (status & PORT_SUSPEND) ? " SUSPEND" : "",
274 (status & PORT_RESUME) ? " RESUME" : "",
275 (status & PORT_OCC) ? " OCC" : "",
276 (status & PORT_OC) ? " OC" : "",
277 (status & PORT_PEC) ? " PEC" : "",
278 (status & PORT_PE) ? " PE" : "",
279 (status & PORT_CSC) ? " CSC" : "",
280 (status & PORT_CONNECT) ? " CONNECT" : "");
281 }
282
283 #else
284 static inline void __maybe_unused
285 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
286 {}
287
288 static inline int __maybe_unused
289 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
290 { return 0; }
291
292 static inline int __maybe_unused
293 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
294 { return 0; }
295
296 static inline int __maybe_unused
297 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
298 { return 0; }
299
300 static inline int __maybe_unused
301 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
302 { return 0; }
303
304 #endif /* CONFIG_DYNAMIC_DEBUG */
305
306 /* functions have the "wrong" filename when they're output... */
307 #define dbg_status(ehci, label, status) { \
308 char _buf [80]; \
309 dbg_status_buf (_buf, sizeof _buf, label, status); \
310 ehci_dbg (ehci, "%s\n", _buf); \
311 }
312
313 #define dbg_cmd(ehci, label, command) { \
314 char _buf [80]; \
315 dbg_command_buf (_buf, sizeof _buf, label, command); \
316 ehci_dbg (ehci, "%s\n", _buf); \
317 }
318
319 #define dbg_port(ehci, label, port, status) { \
320 char _buf [80]; \
321 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
322 ehci_dbg (ehci, "%s\n", _buf); \
323 }
324
325 /*-------------------------------------------------------------------------*/
326
327 #ifdef STUB_DEBUG_FILES
328
329 static inline void create_debug_files (struct ehci_hcd *bus) { }
330 static inline void remove_debug_files (struct ehci_hcd *bus) { }
331
332 #else
333
334 /* troubleshooting help: expose state in debugfs */
335
336 static int debug_async_open(struct inode *, struct file *);
337 static int debug_bandwidth_open(struct inode *, struct file *);
338 static int debug_periodic_open(struct inode *, struct file *);
339 static int debug_registers_open(struct inode *, struct file *);
340
341 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
342 static int debug_close(struct inode *, struct file *);
343
344 static const struct file_operations debug_async_fops = {
345 .owner = THIS_MODULE,
346 .open = debug_async_open,
347 .read = debug_output,
348 .release = debug_close,
349 .llseek = default_llseek,
350 };
351 static const struct file_operations debug_bandwidth_fops = {
352 .owner = THIS_MODULE,
353 .open = debug_bandwidth_open,
354 .read = debug_output,
355 .release = debug_close,
356 .llseek = default_llseek,
357 };
358 static const struct file_operations debug_periodic_fops = {
359 .owner = THIS_MODULE,
360 .open = debug_periodic_open,
361 .read = debug_output,
362 .release = debug_close,
363 .llseek = default_llseek,
364 };
365 static const struct file_operations debug_registers_fops = {
366 .owner = THIS_MODULE,
367 .open = debug_registers_open,
368 .read = debug_output,
369 .release = debug_close,
370 .llseek = default_llseek,
371 };
372
373 static struct dentry *ehci_debug_root;
374
375 struct debug_buffer {
376 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
377 struct usb_bus *bus;
378 struct mutex mutex; /* protect filling of buffer */
379 size_t count; /* number of characters filled into buffer */
380 char *output_buf;
381 size_t alloc_size;
382 };
383
384 #define speed_char(info1) ({ char tmp; \
385 switch (info1 & (3 << 12)) { \
386 case QH_FULL_SPEED: tmp = 'f'; break; \
387 case QH_LOW_SPEED: tmp = 'l'; break; \
388 case QH_HIGH_SPEED: tmp = 'h'; break; \
389 default: tmp = '?'; break; \
390 } tmp; })
391
392 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
393 {
394 __u32 v = hc32_to_cpu(ehci, token);
395
396 if (v & QTD_STS_ACTIVE)
397 return '*';
398 if (v & QTD_STS_HALT)
399 return '-';
400 if (!IS_SHORT_READ (v))
401 return ' ';
402 /* tries to advance through hw_alt_next */
403 return '/';
404 }
405
406 static void qh_lines (
407 struct ehci_hcd *ehci,
408 struct ehci_qh *qh,
409 char **nextp,
410 unsigned *sizep
411 )
412 {
413 u32 scratch;
414 u32 hw_curr;
415 struct list_head *entry;
416 struct ehci_qtd *td;
417 unsigned temp;
418 unsigned size = *sizep;
419 char *next = *nextp;
420 char mark;
421 __le32 list_end = EHCI_LIST_END(ehci);
422 struct ehci_qh_hw *hw = qh->hw;
423
424 if (hw->hw_qtd_next == list_end) /* NEC does this */
425 mark = '@';
426 else
427 mark = token_mark(ehci, hw->hw_token);
428 if (mark == '/') { /* qh_alt_next controls qh advance? */
429 if ((hw->hw_alt_next & QTD_MASK(ehci))
430 == ehci->async->hw->hw_alt_next)
431 mark = '#'; /* blocked */
432 else if (hw->hw_alt_next == list_end)
433 mark = '.'; /* use hw_qtd_next */
434 /* else alt_next points to some other qtd */
435 }
436 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
437 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
438 temp = scnprintf (next, size,
439 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)"
440 " [cur %08x next %08x buf[0] %08x]",
441 qh, scratch & 0x007f,
442 speed_char (scratch),
443 (scratch >> 8) & 0x000f,
444 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
445 hc32_to_cpup(ehci, &hw->hw_token), mark,
446 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
447 ? "data1" : "data0",
448 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f,
449 hc32_to_cpup(ehci, &hw->hw_current),
450 hc32_to_cpup(ehci, &hw->hw_qtd_next),
451 hc32_to_cpup(ehci, &hw->hw_buf[0]));
452 size -= temp;
453 next += temp;
454
455 /* hc may be modifying the list as we read it ... */
456 list_for_each (entry, &qh->qtd_list) {
457 td = list_entry (entry, struct ehci_qtd, qtd_list);
458 scratch = hc32_to_cpup(ehci, &td->hw_token);
459 mark = ' ';
460 if (hw_curr == td->qtd_dma)
461 mark = '*';
462 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
463 mark = '+';
464 else if (QTD_LENGTH (scratch)) {
465 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
466 mark = '#';
467 else if (td->hw_alt_next != list_end)
468 mark = '/';
469 }
470 temp = snprintf (next, size,
471 "\n\t%p%c%s len=%d %08x urb %p"
472 " [td %08x buf[0] %08x]",
473 td, mark, ({ char *tmp;
474 switch ((scratch>>8)&0x03) {
475 case 0: tmp = "out"; break;
476 case 1: tmp = "in"; break;
477 case 2: tmp = "setup"; break;
478 default: tmp = "?"; break;
479 } tmp;}),
480 (scratch >> 16) & 0x7fff,
481 scratch,
482 td->urb,
483 (u32) td->qtd_dma,
484 hc32_to_cpup(ehci, &td->hw_buf[0]));
485 if (size < temp)
486 temp = size;
487 size -= temp;
488 next += temp;
489 if (temp == size)
490 goto done;
491 }
492
493 temp = snprintf (next, size, "\n");
494 if (size < temp)
495 temp = size;
496 size -= temp;
497 next += temp;
498
499 done:
500 *sizep = size;
501 *nextp = next;
502 }
503
504 static ssize_t fill_async_buffer(struct debug_buffer *buf)
505 {
506 struct usb_hcd *hcd;
507 struct ehci_hcd *ehci;
508 unsigned long flags;
509 unsigned temp, size;
510 char *next;
511 struct ehci_qh *qh;
512
513 hcd = bus_to_hcd(buf->bus);
514 ehci = hcd_to_ehci (hcd);
515 next = buf->output_buf;
516 size = buf->alloc_size;
517
518 *next = 0;
519
520 /* dumps a snapshot of the async schedule.
521 * usually empty except for long-term bulk reads, or head.
522 * one QH per line, and TDs we know about
523 */
524 spin_lock_irqsave (&ehci->lock, flags);
525 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
526 qh_lines (ehci, qh, &next, &size);
527 if (!list_empty(&ehci->async_unlink) && size > 0) {
528 temp = scnprintf(next, size, "\nunlink =\n");
529 size -= temp;
530 next += temp;
531
532 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
533 if (size <= 0)
534 break;
535 qh_lines(ehci, qh, &next, &size);
536 }
537 }
538 spin_unlock_irqrestore (&ehci->lock, flags);
539
540 return strlen(buf->output_buf);
541 }
542
543 static ssize_t fill_bandwidth_buffer(struct debug_buffer *buf)
544 {
545 struct ehci_hcd *ehci;
546 struct ehci_tt *tt;
547 struct ehci_per_sched *ps;
548 unsigned temp, size;
549 char *next;
550 unsigned i;
551 u8 *bw;
552 u16 *bf;
553 u8 budget[EHCI_BANDWIDTH_SIZE];
554
555 ehci = hcd_to_ehci(bus_to_hcd(buf->bus));
556 next = buf->output_buf;
557 size = buf->alloc_size;
558
559 *next = 0;
560
561 spin_lock_irq(&ehci->lock);
562
563 /* Dump the HS bandwidth table */
564 temp = scnprintf(next, size,
565 "HS bandwidth allocation (us per microframe)\n");
566 size -= temp;
567 next += temp;
568 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
569 bw = &ehci->bandwidth[i];
570 temp = scnprintf(next, size,
571 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
572 i, bw[0], bw[1], bw[2], bw[3],
573 bw[4], bw[5], bw[6], bw[7]);
574 size -= temp;
575 next += temp;
576 }
577
578 /* Dump all the FS/LS tables */
579 list_for_each_entry(tt, &ehci->tt_list, tt_list) {
580 temp = scnprintf(next, size,
581 "\nTT %s port %d FS/LS bandwidth allocation (us per frame)\n",
582 dev_name(&tt->usb_tt->hub->dev),
583 tt->tt_port + !!tt->usb_tt->multi);
584 size -= temp;
585 next += temp;
586
587 bf = tt->bandwidth;
588 temp = scnprintf(next, size,
589 " %5u%5u%5u%5u%5u%5u%5u%5u\n",
590 bf[0], bf[1], bf[2], bf[3],
591 bf[4], bf[5], bf[6], bf[7]);
592 size -= temp;
593 next += temp;
594
595 temp = scnprintf(next, size,
596 "FS/LS budget (us per microframe)\n");
597 size -= temp;
598 next += temp;
599 compute_tt_budget(budget, tt);
600 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
601 bw = &budget[i];
602 temp = scnprintf(next, size,
603 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
604 i, bw[0], bw[1], bw[2], bw[3],
605 bw[4], bw[5], bw[6], bw[7]);
606 size -= temp;
607 next += temp;
608 }
609 list_for_each_entry(ps, &tt->ps_list, ps_list) {
610 temp = scnprintf(next, size,
611 "%s ep %02x: %4u @ %2u.%u+%u mask %04x\n",
612 dev_name(&ps->udev->dev),
613 ps->ep->desc.bEndpointAddress,
614 ps->tt_usecs,
615 ps->bw_phase, ps->phase_uf,
616 ps->bw_period, ps->cs_mask);
617 size -= temp;
618 next += temp;
619 }
620 }
621 spin_unlock_irq(&ehci->lock);
622
623 return next - buf->output_buf;
624 }
625
626 #define DBG_SCHED_LIMIT 64
627 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
628 {
629 struct usb_hcd *hcd;
630 struct ehci_hcd *ehci;
631 unsigned long flags;
632 union ehci_shadow p, *seen;
633 unsigned temp, size, seen_count;
634 char *next;
635 unsigned i;
636 __hc32 tag;
637
638 seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC);
639 if (!seen)
640 return 0;
641 seen_count = 0;
642
643 hcd = bus_to_hcd(buf->bus);
644 ehci = hcd_to_ehci (hcd);
645 next = buf->output_buf;
646 size = buf->alloc_size;
647
648 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
649 size -= temp;
650 next += temp;
651
652 /* dump a snapshot of the periodic schedule.
653 * iso changes, interrupt usually doesn't.
654 */
655 spin_lock_irqsave (&ehci->lock, flags);
656 for (i = 0; i < ehci->periodic_size; i++) {
657 p = ehci->pshadow [i];
658 if (likely (!p.ptr))
659 continue;
660 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
661
662 temp = scnprintf (next, size, "%4d: ", i);
663 size -= temp;
664 next += temp;
665
666 do {
667 struct ehci_qh_hw *hw;
668
669 switch (hc32_to_cpu(ehci, tag)) {
670 case Q_TYPE_QH:
671 hw = p.qh->hw;
672 temp = scnprintf (next, size, " qh%d-%04x/%p",
673 p.qh->ps.period,
674 hc32_to_cpup(ehci,
675 &hw->hw_info2)
676 /* uframe masks */
677 & (QH_CMASK | QH_SMASK),
678 p.qh);
679 size -= temp;
680 next += temp;
681 /* don't repeat what follows this qh */
682 for (temp = 0; temp < seen_count; temp++) {
683 if (seen [temp].ptr != p.ptr)
684 continue;
685 if (p.qh->qh_next.ptr) {
686 temp = scnprintf (next, size,
687 " ...");
688 size -= temp;
689 next += temp;
690 }
691 break;
692 }
693 /* show more info the first time around */
694 if (temp == seen_count) {
695 u32 scratch = hc32_to_cpup(ehci,
696 &hw->hw_info1);
697 struct ehci_qtd *qtd;
698 char *type = "";
699
700 /* count tds, get ep direction */
701 temp = 0;
702 list_for_each_entry (qtd,
703 &p.qh->qtd_list,
704 qtd_list) {
705 temp++;
706 switch (0x03 & (hc32_to_cpu(
707 ehci,
708 qtd->hw_token) >> 8)) {
709 case 0: type = "out"; continue;
710 case 1: type = "in"; continue;
711 }
712 }
713
714 temp = scnprintf (next, size,
715 " (%c%d ep%d%s "
716 "[%d/%d] q%d p%d)",
717 speed_char (scratch),
718 scratch & 0x007f,
719 (scratch >> 8) & 0x000f, type,
720 p.qh->ps.usecs,
721 p.qh->ps.c_usecs,
722 temp,
723 0x7ff & (scratch >> 16));
724
725 if (seen_count < DBG_SCHED_LIMIT)
726 seen [seen_count++].qh = p.qh;
727 } else
728 temp = 0;
729 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
730 p = p.qh->qh_next;
731 break;
732 case Q_TYPE_FSTN:
733 temp = scnprintf (next, size,
734 " fstn-%8x/%p", p.fstn->hw_prev,
735 p.fstn);
736 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
737 p = p.fstn->fstn_next;
738 break;
739 case Q_TYPE_ITD:
740 temp = scnprintf (next, size,
741 " itd/%p", p.itd);
742 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
743 p = p.itd->itd_next;
744 break;
745 case Q_TYPE_SITD:
746 temp = scnprintf (next, size,
747 " sitd%d-%04x/%p",
748 p.sitd->stream->ps.period,
749 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
750 & 0x0000ffff,
751 p.sitd);
752 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
753 p = p.sitd->sitd_next;
754 break;
755 }
756 size -= temp;
757 next += temp;
758 } while (p.ptr);
759
760 temp = scnprintf (next, size, "\n");
761 size -= temp;
762 next += temp;
763 }
764 spin_unlock_irqrestore (&ehci->lock, flags);
765 kfree (seen);
766
767 return buf->alloc_size - size;
768 }
769 #undef DBG_SCHED_LIMIT
770
771 static const char *rh_state_string(struct ehci_hcd *ehci)
772 {
773 switch (ehci->rh_state) {
774 case EHCI_RH_HALTED:
775 return "halted";
776 case EHCI_RH_SUSPENDED:
777 return "suspended";
778 case EHCI_RH_RUNNING:
779 return "running";
780 case EHCI_RH_STOPPING:
781 return "stopping";
782 }
783 return "?";
784 }
785
786 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
787 {
788 struct usb_hcd *hcd;
789 struct ehci_hcd *ehci;
790 unsigned long flags;
791 unsigned temp, size, i;
792 char *next, scratch [80];
793 static char fmt [] = "%*s\n";
794 static char label [] = "";
795
796 hcd = bus_to_hcd(buf->bus);
797 ehci = hcd_to_ehci (hcd);
798 next = buf->output_buf;
799 size = buf->alloc_size;
800
801 spin_lock_irqsave (&ehci->lock, flags);
802
803 if (!HCD_HW_ACCESSIBLE(hcd)) {
804 size = scnprintf (next, size,
805 "bus %s, device %s\n"
806 "%s\n"
807 "SUSPENDED (no register access)\n",
808 hcd->self.controller->bus->name,
809 dev_name(hcd->self.controller),
810 hcd->product_desc);
811 goto done;
812 }
813
814 /* Capability Registers */
815 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
816 temp = scnprintf (next, size,
817 "bus %s, device %s\n"
818 "%s\n"
819 "EHCI %x.%02x, rh state %s\n",
820 hcd->self.controller->bus->name,
821 dev_name(hcd->self.controller),
822 hcd->product_desc,
823 i >> 8, i & 0x0ff, rh_state_string(ehci));
824 size -= temp;
825 next += temp;
826
827 #ifdef CONFIG_PCI
828 /* EHCI 0.96 and later may have "extended capabilities" */
829 if (dev_is_pci(hcd->self.controller)) {
830 struct pci_dev *pdev;
831 u32 offset, cap, cap2;
832 unsigned count = 256/4;
833
834 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
835 offset = HCC_EXT_CAPS(ehci_readl(ehci,
836 &ehci->caps->hcc_params));
837 while (offset && count--) {
838 pci_read_config_dword (pdev, offset, &cap);
839 switch (cap & 0xff) {
840 case 1:
841 temp = scnprintf (next, size,
842 "ownership %08x%s%s\n", cap,
843 (cap & (1 << 24)) ? " linux" : "",
844 (cap & (1 << 16)) ? " firmware" : "");
845 size -= temp;
846 next += temp;
847
848 offset += 4;
849 pci_read_config_dword (pdev, offset, &cap2);
850 temp = scnprintf (next, size,
851 "SMI sts/enable 0x%08x\n", cap2);
852 size -= temp;
853 next += temp;
854 break;
855 case 0: /* illegal reserved capability */
856 cap = 0;
857 /* FALLTHROUGH */
858 default: /* unknown */
859 break;
860 }
861 temp = (cap >> 8) & 0xff;
862 }
863 }
864 #endif
865
866 // FIXME interpret both types of params
867 i = ehci_readl(ehci, &ehci->caps->hcs_params);
868 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
869 size -= temp;
870 next += temp;
871
872 i = ehci_readl(ehci, &ehci->caps->hcc_params);
873 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
874 size -= temp;
875 next += temp;
876
877 /* Operational Registers */
878 temp = dbg_status_buf (scratch, sizeof scratch, label,
879 ehci_readl(ehci, &ehci->regs->status));
880 temp = scnprintf (next, size, fmt, temp, scratch);
881 size -= temp;
882 next += temp;
883
884 temp = dbg_command_buf (scratch, sizeof scratch, label,
885 ehci_readl(ehci, &ehci->regs->command));
886 temp = scnprintf (next, size, fmt, temp, scratch);
887 size -= temp;
888 next += temp;
889
890 temp = dbg_intr_buf (scratch, sizeof scratch, label,
891 ehci_readl(ehci, &ehci->regs->intr_enable));
892 temp = scnprintf (next, size, fmt, temp, scratch);
893 size -= temp;
894 next += temp;
895
896 temp = scnprintf (next, size, "uframe %04x\n",
897 ehci_read_frame_index(ehci));
898 size -= temp;
899 next += temp;
900
901 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
902 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
903 ehci_readl(ehci,
904 &ehci->regs->port_status[i - 1]));
905 temp = scnprintf (next, size, fmt, temp, scratch);
906 size -= temp;
907 next += temp;
908 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
909 temp = scnprintf (next, size,
910 " debug control %08x\n",
911 ehci_readl(ehci,
912 &ehci->debug->control));
913 size -= temp;
914 next += temp;
915 }
916 }
917
918 if (!list_empty(&ehci->async_unlink)) {
919 temp = scnprintf(next, size, "async unlink qh %p\n",
920 list_first_entry(&ehci->async_unlink,
921 struct ehci_qh, unlink_node));
922 size -= temp;
923 next += temp;
924 }
925
926 #ifdef EHCI_STATS
927 temp = scnprintf (next, size,
928 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
929 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
930 ehci->stats.lost_iaa);
931 size -= temp;
932 next += temp;
933
934 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
935 ehci->stats.complete, ehci->stats.unlink);
936 size -= temp;
937 next += temp;
938 #endif
939
940 done:
941 spin_unlock_irqrestore (&ehci->lock, flags);
942
943 return buf->alloc_size - size;
944 }
945
946 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
947 ssize_t (*fill_func)(struct debug_buffer *))
948 {
949 struct debug_buffer *buf;
950
951 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
952
953 if (buf) {
954 buf->bus = bus;
955 buf->fill_func = fill_func;
956 mutex_init(&buf->mutex);
957 buf->alloc_size = PAGE_SIZE;
958 }
959
960 return buf;
961 }
962
963 static int fill_buffer(struct debug_buffer *buf)
964 {
965 int ret = 0;
966
967 if (!buf->output_buf)
968 buf->output_buf = vmalloc(buf->alloc_size);
969
970 if (!buf->output_buf) {
971 ret = -ENOMEM;
972 goto out;
973 }
974
975 ret = buf->fill_func(buf);
976
977 if (ret >= 0) {
978 buf->count = ret;
979 ret = 0;
980 }
981
982 out:
983 return ret;
984 }
985
986 static ssize_t debug_output(struct file *file, char __user *user_buf,
987 size_t len, loff_t *offset)
988 {
989 struct debug_buffer *buf = file->private_data;
990 int ret = 0;
991
992 mutex_lock(&buf->mutex);
993 if (buf->count == 0) {
994 ret = fill_buffer(buf);
995 if (ret != 0) {
996 mutex_unlock(&buf->mutex);
997 goto out;
998 }
999 }
1000 mutex_unlock(&buf->mutex);
1001
1002 ret = simple_read_from_buffer(user_buf, len, offset,
1003 buf->output_buf, buf->count);
1004
1005 out:
1006 return ret;
1007
1008 }
1009
1010 static int debug_close(struct inode *inode, struct file *file)
1011 {
1012 struct debug_buffer *buf = file->private_data;
1013
1014 if (buf) {
1015 vfree(buf->output_buf);
1016 kfree(buf);
1017 }
1018
1019 return 0;
1020 }
1021
1022 static int debug_async_open(struct inode *inode, struct file *file)
1023 {
1024 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
1025
1026 return file->private_data ? 0 : -ENOMEM;
1027 }
1028
1029 static int debug_bandwidth_open(struct inode *inode, struct file *file)
1030 {
1031 file->private_data = alloc_buffer(inode->i_private,
1032 fill_bandwidth_buffer);
1033
1034 return file->private_data ? 0 : -ENOMEM;
1035 }
1036
1037 static int debug_periodic_open(struct inode *inode, struct file *file)
1038 {
1039 struct debug_buffer *buf;
1040 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
1041 if (!buf)
1042 return -ENOMEM;
1043
1044 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
1045 file->private_data = buf;
1046 return 0;
1047 }
1048
1049 static int debug_registers_open(struct inode *inode, struct file *file)
1050 {
1051 file->private_data = alloc_buffer(inode->i_private,
1052 fill_registers_buffer);
1053
1054 return file->private_data ? 0 : -ENOMEM;
1055 }
1056
1057 static inline void create_debug_files (struct ehci_hcd *ehci)
1058 {
1059 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1060
1061 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1062 if (!ehci->debug_dir)
1063 return;
1064
1065 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1066 &debug_async_fops))
1067 goto file_error;
1068
1069 if (!debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus,
1070 &debug_bandwidth_fops))
1071 goto file_error;
1072
1073 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1074 &debug_periodic_fops))
1075 goto file_error;
1076
1077 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1078 &debug_registers_fops))
1079 goto file_error;
1080
1081 return;
1082
1083 file_error:
1084 debugfs_remove_recursive(ehci->debug_dir);
1085 }
1086
1087 static inline void remove_debug_files (struct ehci_hcd *ehci)
1088 {
1089 debugfs_remove_recursive(ehci->debug_dir);
1090 }
1091
1092 #endif /* STUB_DEBUG_FILES */
Linux kernel - Deliverables
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