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 #if defined(DEBUG) || defined(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 #if defined(DEBUG) || defined(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 #if defined(DEBUG) || defined(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 /* DEBUG || 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 qh, scratch & 0x007f, 441 speed_char (scratch), 442 (scratch >> 8) & 0x000f, 443 scratch, hc32_to_cpup(ehci, &hw->hw_info2), 444 hc32_to_cpup(ehci, &hw->hw_token), mark, 445 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) 446 ? "data1" : "data0", 447 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); 448 size -= temp; 449 next += temp; 450 451 /* hc may be modifying the list as we read it ... */ 452 list_for_each (entry, &qh->qtd_list) { 453 td = list_entry (entry, struct ehci_qtd, qtd_list); 454 scratch = hc32_to_cpup(ehci, &td->hw_token); 455 mark = ' '; 456 if (hw_curr == td->qtd_dma) 457 mark = '*'; 458 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) 459 mark = '+'; 460 else if (QTD_LENGTH (scratch)) { 461 if (td->hw_alt_next == ehci->async->hw->hw_alt_next) 462 mark = '#'; 463 else if (td->hw_alt_next != list_end) 464 mark = '/'; 465 } 466 temp = snprintf (next, size, 467 "\n\t%p%c%s len=%d %08x urb %p", 468 td, mark, ({ char *tmp; 469 switch ((scratch>>8)&0x03) { 470 case 0: tmp = "out"; break; 471 case 1: tmp = "in"; break; 472 case 2: tmp = "setup"; break; 473 default: tmp = "?"; break; 474 } tmp;}), 475 (scratch >> 16) & 0x7fff, 476 scratch, 477 td->urb); 478 if (size < temp) 479 temp = size; 480 size -= temp; 481 next += temp; 482 if (temp == size) 483 goto done; 484 } 485 486 temp = snprintf (next, size, "\n"); 487 if (size < temp) 488 temp = size; 489 size -= temp; 490 next += temp; 491 492 done: 493 *sizep = size; 494 *nextp = next; 495 } 496 497 static ssize_t fill_async_buffer(struct debug_buffer *buf) 498 { 499 struct usb_hcd *hcd; 500 struct ehci_hcd *ehci; 501 unsigned long flags; 502 unsigned temp, size; 503 char *next; 504 struct ehci_qh *qh; 505 506 hcd = bus_to_hcd(buf->bus); 507 ehci = hcd_to_ehci (hcd); 508 next = buf->output_buf; 509 size = buf->alloc_size; 510 511 *next = 0; 512 513 /* dumps a snapshot of the async schedule. 514 * usually empty except for long-term bulk reads, or head. 515 * one QH per line, and TDs we know about 516 */ 517 spin_lock_irqsave (&ehci->lock, flags); 518 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) 519 qh_lines (ehci, qh, &next, &size); 520 if (!list_empty(&ehci->async_unlink) && size > 0) { 521 temp = scnprintf(next, size, "\nunlink =\n"); 522 size -= temp; 523 next += temp; 524 525 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) { 526 if (size <= 0) 527 break; 528 qh_lines(ehci, qh, &next, &size); 529 } 530 } 531 spin_unlock_irqrestore (&ehci->lock, flags); 532 533 return strlen(buf->output_buf); 534 } 535 536 static ssize_t fill_bandwidth_buffer(struct debug_buffer *buf) 537 { 538 struct ehci_hcd *ehci; 539 struct ehci_tt *tt; 540 struct ehci_per_sched *ps; 541 unsigned temp, size; 542 char *next; 543 unsigned i; 544 u8 *bw; 545 u16 *bf; 546 u8 budget[EHCI_BANDWIDTH_SIZE]; 547 548 ehci = hcd_to_ehci(bus_to_hcd(buf->bus)); 549 next = buf->output_buf; 550 size = buf->alloc_size; 551 552 *next = 0; 553 554 spin_lock_irq(&ehci->lock); 555 556 /* Dump the HS bandwidth table */ 557 temp = scnprintf(next, size, 558 "HS bandwidth allocation (us per microframe)\n"); 559 size -= temp; 560 next += temp; 561 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) { 562 bw = &ehci->bandwidth[i]; 563 temp = scnprintf(next, size, 564 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n", 565 i, bw[0], bw[1], bw[2], bw[3], 566 bw[4], bw[5], bw[6], bw[7]); 567 size -= temp; 568 next += temp; 569 } 570 571 /* Dump all the FS/LS tables */ 572 list_for_each_entry(tt, &ehci->tt_list, tt_list) { 573 temp = scnprintf(next, size, 574 "\nTT %s port %d FS/LS bandwidth allocation (us per frame)\n", 575 dev_name(&tt->usb_tt->hub->dev), 576 tt->tt_port + !!tt->usb_tt->multi); 577 size -= temp; 578 next += temp; 579 580 bf = tt->bandwidth; 581 temp = scnprintf(next, size, 582 " %5u%5u%5u%5u%5u%5u%5u%5u\n", 583 bf[0], bf[1], bf[2], bf[3], 584 bf[4], bf[5], bf[6], bf[7]); 585 size -= temp; 586 next += temp; 587 588 temp = scnprintf(next, size, 589 "FS/LS budget (us per microframe)\n"); 590 size -= temp; 591 next += temp; 592 compute_tt_budget(budget, tt); 593 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) { 594 bw = &budget[i]; 595 temp = scnprintf(next, size, 596 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n", 597 i, bw[0], bw[1], bw[2], bw[3], 598 bw[4], bw[5], bw[6], bw[7]); 599 size -= temp; 600 next += temp; 601 } 602 list_for_each_entry(ps, &tt->ps_list, ps_list) { 603 temp = scnprintf(next, size, 604 "%s ep %02x: %4u @ %2u.%u+%u mask %04x\n", 605 dev_name(&ps->udev->dev), 606 ps->ep->desc.bEndpointAddress, 607 ps->tt_usecs, 608 ps->bw_phase, ps->phase_uf, 609 ps->bw_period, ps->cs_mask); 610 size -= temp; 611 next += temp; 612 } 613 } 614 spin_unlock_irq(&ehci->lock); 615 616 return next - buf->output_buf; 617 } 618 619 #define DBG_SCHED_LIMIT 64 620 static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 621 { 622 struct usb_hcd *hcd; 623 struct ehci_hcd *ehci; 624 unsigned long flags; 625 union ehci_shadow p, *seen; 626 unsigned temp, size, seen_count; 627 char *next; 628 unsigned i; 629 __hc32 tag; 630 631 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 632 return 0; 633 seen_count = 0; 634 635 hcd = bus_to_hcd(buf->bus); 636 ehci = hcd_to_ehci (hcd); 637 next = buf->output_buf; 638 size = buf->alloc_size; 639 640 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); 641 size -= temp; 642 next += temp; 643 644 /* dump a snapshot of the periodic schedule. 645 * iso changes, interrupt usually doesn't. 646 */ 647 spin_lock_irqsave (&ehci->lock, flags); 648 for (i = 0; i < ehci->periodic_size; i++) { 649 p = ehci->pshadow [i]; 650 if (likely (!p.ptr)) 651 continue; 652 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); 653 654 temp = scnprintf (next, size, "%4d: ", i); 655 size -= temp; 656 next += temp; 657 658 do { 659 struct ehci_qh_hw *hw; 660 661 switch (hc32_to_cpu(ehci, tag)) { 662 case Q_TYPE_QH: 663 hw = p.qh->hw; 664 temp = scnprintf (next, size, " qh%d-%04x/%p", 665 p.qh->ps.period, 666 hc32_to_cpup(ehci, 667 &hw->hw_info2) 668 /* uframe masks */ 669 & (QH_CMASK | QH_SMASK), 670 p.qh); 671 size -= temp; 672 next += temp; 673 /* don't repeat what follows this qh */ 674 for (temp = 0; temp < seen_count; temp++) { 675 if (seen [temp].ptr != p.ptr) 676 continue; 677 if (p.qh->qh_next.ptr) { 678 temp = scnprintf (next, size, 679 " ..."); 680 size -= temp; 681 next += temp; 682 } 683 break; 684 } 685 /* show more info the first time around */ 686 if (temp == seen_count) { 687 u32 scratch = hc32_to_cpup(ehci, 688 &hw->hw_info1); 689 struct ehci_qtd *qtd; 690 char *type = ""; 691 692 /* count tds, get ep direction */ 693 temp = 0; 694 list_for_each_entry (qtd, 695 &p.qh->qtd_list, 696 qtd_list) { 697 temp++; 698 switch (0x03 & (hc32_to_cpu( 699 ehci, 700 qtd->hw_token) >> 8)) { 701 case 0: type = "out"; continue; 702 case 1: type = "in"; continue; 703 } 704 } 705 706 temp = scnprintf (next, size, 707 " (%c%d ep%d%s " 708 "[%d/%d] q%d p%d)", 709 speed_char (scratch), 710 scratch & 0x007f, 711 (scratch >> 8) & 0x000f, type, 712 p.qh->ps.usecs, 713 p.qh->ps.c_usecs, 714 temp, 715 0x7ff & (scratch >> 16)); 716 717 if (seen_count < DBG_SCHED_LIMIT) 718 seen [seen_count++].qh = p.qh; 719 } else 720 temp = 0; 721 tag = Q_NEXT_TYPE(ehci, hw->hw_next); 722 p = p.qh->qh_next; 723 break; 724 case Q_TYPE_FSTN: 725 temp = scnprintf (next, size, 726 " fstn-%8x/%p", p.fstn->hw_prev, 727 p.fstn); 728 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); 729 p = p.fstn->fstn_next; 730 break; 731 case Q_TYPE_ITD: 732 temp = scnprintf (next, size, 733 " itd/%p", p.itd); 734 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); 735 p = p.itd->itd_next; 736 break; 737 case Q_TYPE_SITD: 738 temp = scnprintf (next, size, 739 " sitd%d-%04x/%p", 740 p.sitd->stream->ps.period, 741 hc32_to_cpup(ehci, &p.sitd->hw_uframe) 742 & 0x0000ffff, 743 p.sitd); 744 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); 745 p = p.sitd->sitd_next; 746 break; 747 } 748 size -= temp; 749 next += temp; 750 } while (p.ptr); 751 752 temp = scnprintf (next, size, "\n"); 753 size -= temp; 754 next += temp; 755 } 756 spin_unlock_irqrestore (&ehci->lock, flags); 757 kfree (seen); 758 759 return buf->alloc_size - size; 760 } 761 #undef DBG_SCHED_LIMIT 762 763 static const char *rh_state_string(struct ehci_hcd *ehci) 764 { 765 switch (ehci->rh_state) { 766 case EHCI_RH_HALTED: 767 return "halted"; 768 case EHCI_RH_SUSPENDED: 769 return "suspended"; 770 case EHCI_RH_RUNNING: 771 return "running"; 772 case EHCI_RH_STOPPING: 773 return "stopping"; 774 } 775 return "?"; 776 } 777 778 static ssize_t fill_registers_buffer(struct debug_buffer *buf) 779 { 780 struct usb_hcd *hcd; 781 struct ehci_hcd *ehci; 782 unsigned long flags; 783 unsigned temp, size, i; 784 char *next, scratch [80]; 785 static char fmt [] = "%*s\n"; 786 static char label [] = ""; 787 788 hcd = bus_to_hcd(buf->bus); 789 ehci = hcd_to_ehci (hcd); 790 next = buf->output_buf; 791 size = buf->alloc_size; 792 793 spin_lock_irqsave (&ehci->lock, flags); 794 795 if (!HCD_HW_ACCESSIBLE(hcd)) { 796 size = scnprintf (next, size, 797 "bus %s, device %s\n" 798 "%s\n" 799 "SUSPENDED (no register access)\n", 800 hcd->self.controller->bus->name, 801 dev_name(hcd->self.controller), 802 hcd->product_desc); 803 goto done; 804 } 805 806 /* Capability Registers */ 807 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); 808 temp = scnprintf (next, size, 809 "bus %s, device %s\n" 810 "%s\n" 811 "EHCI %x.%02x, rh state %s\n", 812 hcd->self.controller->bus->name, 813 dev_name(hcd->self.controller), 814 hcd->product_desc, 815 i >> 8, i & 0x0ff, rh_state_string(ehci)); 816 size -= temp; 817 next += temp; 818 819 #ifdef CONFIG_PCI 820 /* EHCI 0.96 and later may have "extended capabilities" */ 821 if (hcd->self.controller->bus == &pci_bus_type) { 822 struct pci_dev *pdev; 823 u32 offset, cap, cap2; 824 unsigned count = 256/4; 825 826 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); 827 offset = HCC_EXT_CAPS(ehci_readl(ehci, 828 &ehci->caps->hcc_params)); 829 while (offset && count--) { 830 pci_read_config_dword (pdev, offset, &cap); 831 switch (cap & 0xff) { 832 case 1: 833 temp = scnprintf (next, size, 834 "ownership %08x%s%s\n", cap, 835 (cap & (1 << 24)) ? " linux" : "", 836 (cap & (1 << 16)) ? " firmware" : ""); 837 size -= temp; 838 next += temp; 839 840 offset += 4; 841 pci_read_config_dword (pdev, offset, &cap2); 842 temp = scnprintf (next, size, 843 "SMI sts/enable 0x%08x\n", cap2); 844 size -= temp; 845 next += temp; 846 break; 847 case 0: /* illegal reserved capability */ 848 cap = 0; 849 /* FALLTHROUGH */ 850 default: /* unknown */ 851 break; 852 } 853 temp = (cap >> 8) & 0xff; 854 } 855 } 856 #endif 857 858 // FIXME interpret both types of params 859 i = ehci_readl(ehci, &ehci->caps->hcs_params); 860 temp = scnprintf (next, size, "structural params 0x%08x\n", i); 861 size -= temp; 862 next += temp; 863 864 i = ehci_readl(ehci, &ehci->caps->hcc_params); 865 temp = scnprintf (next, size, "capability params 0x%08x\n", i); 866 size -= temp; 867 next += temp; 868 869 /* Operational Registers */ 870 temp = dbg_status_buf (scratch, sizeof scratch, label, 871 ehci_readl(ehci, &ehci->regs->status)); 872 temp = scnprintf (next, size, fmt, temp, scratch); 873 size -= temp; 874 next += temp; 875 876 temp = dbg_command_buf (scratch, sizeof scratch, label, 877 ehci_readl(ehci, &ehci->regs->command)); 878 temp = scnprintf (next, size, fmt, temp, scratch); 879 size -= temp; 880 next += temp; 881 882 temp = dbg_intr_buf (scratch, sizeof scratch, label, 883 ehci_readl(ehci, &ehci->regs->intr_enable)); 884 temp = scnprintf (next, size, fmt, temp, scratch); 885 size -= temp; 886 next += temp; 887 888 temp = scnprintf (next, size, "uframe %04x\n", 889 ehci_read_frame_index(ehci)); 890 size -= temp; 891 next += temp; 892 893 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { 894 temp = dbg_port_buf (scratch, sizeof scratch, label, i, 895 ehci_readl(ehci, 896 &ehci->regs->port_status[i - 1])); 897 temp = scnprintf (next, size, fmt, temp, scratch); 898 size -= temp; 899 next += temp; 900 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { 901 temp = scnprintf (next, size, 902 " debug control %08x\n", 903 ehci_readl(ehci, 904 &ehci->debug->control)); 905 size -= temp; 906 next += temp; 907 } 908 } 909 910 if (!list_empty(&ehci->async_unlink)) { 911 temp = scnprintf(next, size, "async unlink qh %p\n", 912 list_first_entry(&ehci->async_unlink, 913 struct ehci_qh, unlink_node)); 914 size -= temp; 915 next += temp; 916 } 917 918 #ifdef EHCI_STATS 919 temp = scnprintf (next, size, 920 "irq normal %ld err %ld iaa %ld (lost %ld)\n", 921 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, 922 ehci->stats.lost_iaa); 923 size -= temp; 924 next += temp; 925 926 temp = scnprintf (next, size, "complete %ld unlink %ld\n", 927 ehci->stats.complete, ehci->stats.unlink); 928 size -= temp; 929 next += temp; 930 #endif 931 932 done: 933 spin_unlock_irqrestore (&ehci->lock, flags); 934 935 return buf->alloc_size - size; 936 } 937 938 static struct debug_buffer *alloc_buffer(struct usb_bus *bus, 939 ssize_t (*fill_func)(struct debug_buffer *)) 940 { 941 struct debug_buffer *buf; 942 943 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 944 945 if (buf) { 946 buf->bus = bus; 947 buf->fill_func = fill_func; 948 mutex_init(&buf->mutex); 949 buf->alloc_size = PAGE_SIZE; 950 } 951 952 return buf; 953 } 954 955 static int fill_buffer(struct debug_buffer *buf) 956 { 957 int ret = 0; 958 959 if (!buf->output_buf) 960 buf->output_buf = vmalloc(buf->alloc_size); 961 962 if (!buf->output_buf) { 963 ret = -ENOMEM; 964 goto out; 965 } 966 967 ret = buf->fill_func(buf); 968 969 if (ret >= 0) { 970 buf->count = ret; 971 ret = 0; 972 } 973 974 out: 975 return ret; 976 } 977 978 static ssize_t debug_output(struct file *file, char __user *user_buf, 979 size_t len, loff_t *offset) 980 { 981 struct debug_buffer *buf = file->private_data; 982 int ret = 0; 983 984 mutex_lock(&buf->mutex); 985 if (buf->count == 0) { 986 ret = fill_buffer(buf); 987 if (ret != 0) { 988 mutex_unlock(&buf->mutex); 989 goto out; 990 } 991 } 992 mutex_unlock(&buf->mutex); 993 994 ret = simple_read_from_buffer(user_buf, len, offset, 995 buf->output_buf, buf->count); 996 997 out: 998 return ret; 999 1000 } 1001 1002 static int debug_close(struct inode *inode, struct file *file) 1003 { 1004 struct debug_buffer *buf = file->private_data; 1005 1006 if (buf) { 1007 vfree(buf->output_buf); 1008 kfree(buf); 1009 } 1010 1011 return 0; 1012 } 1013 1014 static int debug_async_open(struct inode *inode, struct file *file) 1015 { 1016 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 1017 1018 return file->private_data ? 0 : -ENOMEM; 1019 } 1020 1021 static int debug_bandwidth_open(struct inode *inode, struct file *file) 1022 { 1023 file->private_data = alloc_buffer(inode->i_private, 1024 fill_bandwidth_buffer); 1025 1026 return file->private_data ? 0 : -ENOMEM; 1027 } 1028 1029 static int debug_periodic_open(struct inode *inode, struct file *file) 1030 { 1031 struct debug_buffer *buf; 1032 buf = alloc_buffer(inode->i_private, fill_periodic_buffer); 1033 if (!buf) 1034 return -ENOMEM; 1035 1036 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; 1037 file->private_data = buf; 1038 return 0; 1039 } 1040 1041 static int debug_registers_open(struct inode *inode, struct file *file) 1042 { 1043 file->private_data = alloc_buffer(inode->i_private, 1044 fill_registers_buffer); 1045 1046 return file->private_data ? 0 : -ENOMEM; 1047 } 1048 1049 static inline void create_debug_files (struct ehci_hcd *ehci) 1050 { 1051 struct usb_bus *bus = &ehci_to_hcd(ehci)->self; 1052 1053 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); 1054 if (!ehci->debug_dir) 1055 return; 1056 1057 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, 1058 &debug_async_fops)) 1059 goto file_error; 1060 1061 if (!debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus, 1062 &debug_bandwidth_fops)) 1063 goto file_error; 1064 1065 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, 1066 &debug_periodic_fops)) 1067 goto file_error; 1068 1069 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, 1070 &debug_registers_fops)) 1071 goto file_error; 1072 1073 return; 1074 1075 file_error: 1076 debugfs_remove_recursive(ehci->debug_dir); 1077 } 1078 1079 static inline void remove_debug_files (struct ehci_hcd *ehci) 1080 { 1081 debugfs_remove_recursive(ehci->debug_dir); 1082 } 1083 1084 #endif /* STUB_DEBUG_FILES */ 1085