| 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 | 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 | seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC); |
| 632 | if (!seen) |
| 633 | return 0; |
| 634 | seen_count = 0; |
| 635 | |
| 636 | hcd = bus_to_hcd(buf->bus); |
| 637 | ehci = hcd_to_ehci (hcd); |
| 638 | next = buf->output_buf; |
| 639 | size = buf->alloc_size; |
| 640 | |
| 641 | temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); |
| 642 | size -= temp; |
| 643 | next += temp; |
| 644 | |
| 645 | /* dump a snapshot of the periodic schedule. |
| 646 | * iso changes, interrupt usually doesn't. |
| 647 | */ |
| 648 | spin_lock_irqsave (&ehci->lock, flags); |
| 649 | for (i = 0; i < ehci->periodic_size; i++) { |
| 650 | p = ehci->pshadow [i]; |
| 651 | if (likely (!p.ptr)) |
| 652 | continue; |
| 653 | tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); |
| 654 | |
| 655 | temp = scnprintf (next, size, "%4d: ", i); |
| 656 | size -= temp; |
| 657 | next += temp; |
| 658 | |
| 659 | do { |
| 660 | struct ehci_qh_hw *hw; |
| 661 | |
| 662 | switch (hc32_to_cpu(ehci, tag)) { |
| 663 | case Q_TYPE_QH: |
| 664 | hw = p.qh->hw; |
| 665 | temp = scnprintf (next, size, " qh%d-%04x/%p", |
| 666 | p.qh->ps.period, |
| 667 | hc32_to_cpup(ehci, |
| 668 | &hw->hw_info2) |
| 669 | /* uframe masks */ |
| 670 | & (QH_CMASK | QH_SMASK), |
| 671 | p.qh); |
| 672 | size -= temp; |
| 673 | next += temp; |
| 674 | /* don't repeat what follows this qh */ |
| 675 | for (temp = 0; temp < seen_count; temp++) { |
| 676 | if (seen [temp].ptr != p.ptr) |
| 677 | continue; |
| 678 | if (p.qh->qh_next.ptr) { |
| 679 | temp = scnprintf (next, size, |
| 680 | " ..."); |
| 681 | size -= temp; |
| 682 | next += temp; |
| 683 | } |
| 684 | break; |
| 685 | } |
| 686 | /* show more info the first time around */ |
| 687 | if (temp == seen_count) { |
| 688 | u32 scratch = hc32_to_cpup(ehci, |
| 689 | &hw->hw_info1); |
| 690 | struct ehci_qtd *qtd; |
| 691 | char *type = ""; |
| 692 | |
| 693 | /* count tds, get ep direction */ |
| 694 | temp = 0; |
| 695 | list_for_each_entry (qtd, |
| 696 | &p.qh->qtd_list, |
| 697 | qtd_list) { |
| 698 | temp++; |
| 699 | switch (0x03 & (hc32_to_cpu( |
| 700 | ehci, |
| 701 | qtd->hw_token) >> 8)) { |
| 702 | case 0: type = "out"; continue; |
| 703 | case 1: type = "in"; continue; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | temp = scnprintf (next, size, |
| 708 | " (%c%d ep%d%s " |
| 709 | "[%d/%d] q%d p%d)", |
| 710 | speed_char (scratch), |
| 711 | scratch & 0x007f, |
| 712 | (scratch >> 8) & 0x000f, type, |
| 713 | p.qh->ps.usecs, |
| 714 | p.qh->ps.c_usecs, |
| 715 | temp, |
| 716 | 0x7ff & (scratch >> 16)); |
| 717 | |
| 718 | if (seen_count < DBG_SCHED_LIMIT) |
| 719 | seen [seen_count++].qh = p.qh; |
| 720 | } else |
| 721 | temp = 0; |
| 722 | tag = Q_NEXT_TYPE(ehci, hw->hw_next); |
| 723 | p = p.qh->qh_next; |
| 724 | break; |
| 725 | case Q_TYPE_FSTN: |
| 726 | temp = scnprintf (next, size, |
| 727 | " fstn-%8x/%p", p.fstn->hw_prev, |
| 728 | p.fstn); |
| 729 | tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); |
| 730 | p = p.fstn->fstn_next; |
| 731 | break; |
| 732 | case Q_TYPE_ITD: |
| 733 | temp = scnprintf (next, size, |
| 734 | " itd/%p", p.itd); |
| 735 | tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); |
| 736 | p = p.itd->itd_next; |
| 737 | break; |
| 738 | case Q_TYPE_SITD: |
| 739 | temp = scnprintf (next, size, |
| 740 | " sitd%d-%04x/%p", |
| 741 | p.sitd->stream->ps.period, |
| 742 | hc32_to_cpup(ehci, &p.sitd->hw_uframe) |
| 743 | & 0x0000ffff, |
| 744 | p.sitd); |
| 745 | tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); |
| 746 | p = p.sitd->sitd_next; |
| 747 | break; |
| 748 | } |
| 749 | size -= temp; |
| 750 | next += temp; |
| 751 | } while (p.ptr); |
| 752 | |
| 753 | temp = scnprintf (next, size, "\n"); |
| 754 | size -= temp; |
| 755 | next += temp; |
| 756 | } |
| 757 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 758 | kfree (seen); |
| 759 | |
| 760 | return buf->alloc_size - size; |
| 761 | } |
| 762 | #undef DBG_SCHED_LIMIT |
| 763 | |
| 764 | static const char *rh_state_string(struct ehci_hcd *ehci) |
| 765 | { |
| 766 | switch (ehci->rh_state) { |
| 767 | case EHCI_RH_HALTED: |
| 768 | return "halted"; |
| 769 | case EHCI_RH_SUSPENDED: |
| 770 | return "suspended"; |
| 771 | case EHCI_RH_RUNNING: |
| 772 | return "running"; |
| 773 | case EHCI_RH_STOPPING: |
| 774 | return "stopping"; |
| 775 | } |
| 776 | return "?"; |
| 777 | } |
| 778 | |
| 779 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
| 780 | { |
| 781 | struct usb_hcd *hcd; |
| 782 | struct ehci_hcd *ehci; |
| 783 | unsigned long flags; |
| 784 | unsigned temp, size, i; |
| 785 | char *next, scratch [80]; |
| 786 | static char fmt [] = "%*s\n"; |
| 787 | static char label [] = ""; |
| 788 | |
| 789 | hcd = bus_to_hcd(buf->bus); |
| 790 | ehci = hcd_to_ehci (hcd); |
| 791 | next = buf->output_buf; |
| 792 | size = buf->alloc_size; |
| 793 | |
| 794 | spin_lock_irqsave (&ehci->lock, flags); |
| 795 | |
| 796 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
| 797 | size = scnprintf (next, size, |
| 798 | "bus %s, device %s\n" |
| 799 | "%s\n" |
| 800 | "SUSPENDED (no register access)\n", |
| 801 | hcd->self.controller->bus->name, |
| 802 | dev_name(hcd->self.controller), |
| 803 | hcd->product_desc); |
| 804 | goto done; |
| 805 | } |
| 806 | |
| 807 | /* Capability Registers */ |
| 808 | i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
| 809 | temp = scnprintf (next, size, |
| 810 | "bus %s, device %s\n" |
| 811 | "%s\n" |
| 812 | "EHCI %x.%02x, rh state %s\n", |
| 813 | hcd->self.controller->bus->name, |
| 814 | dev_name(hcd->self.controller), |
| 815 | hcd->product_desc, |
| 816 | i >> 8, i & 0x0ff, rh_state_string(ehci)); |
| 817 | size -= temp; |
| 818 | next += temp; |
| 819 | |
| 820 | #ifdef CONFIG_PCI |
| 821 | /* EHCI 0.96 and later may have "extended capabilities" */ |
| 822 | if (dev_is_pci(hcd->self.controller)) { |
| 823 | struct pci_dev *pdev; |
| 824 | u32 offset, cap, cap2; |
| 825 | unsigned count = 256/4; |
| 826 | |
| 827 | pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); |
| 828 | offset = HCC_EXT_CAPS(ehci_readl(ehci, |
| 829 | &ehci->caps->hcc_params)); |
| 830 | while (offset && count--) { |
| 831 | pci_read_config_dword (pdev, offset, &cap); |
| 832 | switch (cap & 0xff) { |
| 833 | case 1: |
| 834 | temp = scnprintf (next, size, |
| 835 | "ownership %08x%s%s\n", cap, |
| 836 | (cap & (1 << 24)) ? " linux" : "", |
| 837 | (cap & (1 << 16)) ? " firmware" : ""); |
| 838 | size -= temp; |
| 839 | next += temp; |
| 840 | |
| 841 | offset += 4; |
| 842 | pci_read_config_dword (pdev, offset, &cap2); |
| 843 | temp = scnprintf (next, size, |
| 844 | "SMI sts/enable 0x%08x\n", cap2); |
| 845 | size -= temp; |
| 846 | next += temp; |
| 847 | break; |
| 848 | case 0: /* illegal reserved capability */ |
| 849 | cap = 0; |
| 850 | /* FALLTHROUGH */ |
| 851 | default: /* unknown */ |
| 852 | break; |
| 853 | } |
| 854 | temp = (cap >> 8) & 0xff; |
| 855 | } |
| 856 | } |
| 857 | #endif |
| 858 | |
| 859 | // FIXME interpret both types of params |
| 860 | i = ehci_readl(ehci, &ehci->caps->hcs_params); |
| 861 | temp = scnprintf (next, size, "structural params 0x%08x\n", i); |
| 862 | size -= temp; |
| 863 | next += temp; |
| 864 | |
| 865 | i = ehci_readl(ehci, &ehci->caps->hcc_params); |
| 866 | temp = scnprintf (next, size, "capability params 0x%08x\n", i); |
| 867 | size -= temp; |
| 868 | next += temp; |
| 869 | |
| 870 | /* Operational Registers */ |
| 871 | temp = dbg_status_buf (scratch, sizeof scratch, label, |
| 872 | ehci_readl(ehci, &ehci->regs->status)); |
| 873 | temp = scnprintf (next, size, fmt, temp, scratch); |
| 874 | size -= temp; |
| 875 | next += temp; |
| 876 | |
| 877 | temp = dbg_command_buf (scratch, sizeof scratch, label, |
| 878 | ehci_readl(ehci, &ehci->regs->command)); |
| 879 | temp = scnprintf (next, size, fmt, temp, scratch); |
| 880 | size -= temp; |
| 881 | next += temp; |
| 882 | |
| 883 | temp = dbg_intr_buf (scratch, sizeof scratch, label, |
| 884 | ehci_readl(ehci, &ehci->regs->intr_enable)); |
| 885 | temp = scnprintf (next, size, fmt, temp, scratch); |
| 886 | size -= temp; |
| 887 | next += temp; |
| 888 | |
| 889 | temp = scnprintf (next, size, "uframe %04x\n", |
| 890 | ehci_read_frame_index(ehci)); |
| 891 | size -= temp; |
| 892 | next += temp; |
| 893 | |
| 894 | for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { |
| 895 | temp = dbg_port_buf (scratch, sizeof scratch, label, i, |
| 896 | ehci_readl(ehci, |
| 897 | &ehci->regs->port_status[i - 1])); |
| 898 | temp = scnprintf (next, size, fmt, temp, scratch); |
| 899 | size -= temp; |
| 900 | next += temp; |
| 901 | if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { |
| 902 | temp = scnprintf (next, size, |
| 903 | " debug control %08x\n", |
| 904 | ehci_readl(ehci, |
| 905 | &ehci->debug->control)); |
| 906 | size -= temp; |
| 907 | next += temp; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | if (!list_empty(&ehci->async_unlink)) { |
| 912 | temp = scnprintf(next, size, "async unlink qh %p\n", |
| 913 | list_first_entry(&ehci->async_unlink, |
| 914 | struct ehci_qh, unlink_node)); |
| 915 | size -= temp; |
| 916 | next += temp; |
| 917 | } |
| 918 | |
| 919 | #ifdef EHCI_STATS |
| 920 | temp = scnprintf (next, size, |
| 921 | "irq normal %ld err %ld iaa %ld (lost %ld)\n", |
| 922 | ehci->stats.normal, ehci->stats.error, ehci->stats.iaa, |
| 923 | ehci->stats.lost_iaa); |
| 924 | size -= temp; |
| 925 | next += temp; |
| 926 | |
| 927 | temp = scnprintf (next, size, "complete %ld unlink %ld\n", |
| 928 | ehci->stats.complete, ehci->stats.unlink); |
| 929 | size -= temp; |
| 930 | next += temp; |
| 931 | #endif |
| 932 | |
| 933 | done: |
| 934 | spin_unlock_irqrestore (&ehci->lock, flags); |
| 935 | |
| 936 | return buf->alloc_size - size; |
| 937 | } |
| 938 | |
| 939 | static struct debug_buffer *alloc_buffer(struct usb_bus *bus, |
| 940 | ssize_t (*fill_func)(struct debug_buffer *)) |
| 941 | { |
| 942 | struct debug_buffer *buf; |
| 943 | |
| 944 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); |
| 945 | |
| 946 | if (buf) { |
| 947 | buf->bus = bus; |
| 948 | buf->fill_func = fill_func; |
| 949 | mutex_init(&buf->mutex); |
| 950 | buf->alloc_size = PAGE_SIZE; |
| 951 | } |
| 952 | |
| 953 | return buf; |
| 954 | } |
| 955 | |
| 956 | static int fill_buffer(struct debug_buffer *buf) |
| 957 | { |
| 958 | int ret = 0; |
| 959 | |
| 960 | if (!buf->output_buf) |
| 961 | buf->output_buf = vmalloc(buf->alloc_size); |
| 962 | |
| 963 | if (!buf->output_buf) { |
| 964 | ret = -ENOMEM; |
| 965 | goto out; |
| 966 | } |
| 967 | |
| 968 | ret = buf->fill_func(buf); |
| 969 | |
| 970 | if (ret >= 0) { |
| 971 | buf->count = ret; |
| 972 | ret = 0; |
| 973 | } |
| 974 | |
| 975 | out: |
| 976 | return ret; |
| 977 | } |
| 978 | |
| 979 | static ssize_t debug_output(struct file *file, char __user *user_buf, |
| 980 | size_t len, loff_t *offset) |
| 981 | { |
| 982 | struct debug_buffer *buf = file->private_data; |
| 983 | int ret = 0; |
| 984 | |
| 985 | mutex_lock(&buf->mutex); |
| 986 | if (buf->count == 0) { |
| 987 | ret = fill_buffer(buf); |
| 988 | if (ret != 0) { |
| 989 | mutex_unlock(&buf->mutex); |
| 990 | goto out; |
| 991 | } |
| 992 | } |
| 993 | mutex_unlock(&buf->mutex); |
| 994 | |
| 995 | ret = simple_read_from_buffer(user_buf, len, offset, |
| 996 | buf->output_buf, buf->count); |
| 997 | |
| 998 | out: |
| 999 | return ret; |
| 1000 | |
| 1001 | } |
| 1002 | |
| 1003 | static int debug_close(struct inode *inode, struct file *file) |
| 1004 | { |
| 1005 | struct debug_buffer *buf = file->private_data; |
| 1006 | |
| 1007 | if (buf) { |
| 1008 | vfree(buf->output_buf); |
| 1009 | kfree(buf); |
| 1010 | } |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | static int debug_async_open(struct inode *inode, struct file *file) |
| 1016 | { |
| 1017 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); |
| 1018 | |
| 1019 | return file->private_data ? 0 : -ENOMEM; |
| 1020 | } |
| 1021 | |
| 1022 | static int debug_bandwidth_open(struct inode *inode, struct file *file) |
| 1023 | { |
| 1024 | file->private_data = alloc_buffer(inode->i_private, |
| 1025 | fill_bandwidth_buffer); |
| 1026 | |
| 1027 | return file->private_data ? 0 : -ENOMEM; |
| 1028 | } |
| 1029 | |
| 1030 | static int debug_periodic_open(struct inode *inode, struct file *file) |
| 1031 | { |
| 1032 | struct debug_buffer *buf; |
| 1033 | buf = alloc_buffer(inode->i_private, fill_periodic_buffer); |
| 1034 | if (!buf) |
| 1035 | return -ENOMEM; |
| 1036 | |
| 1037 | buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; |
| 1038 | file->private_data = buf; |
| 1039 | return 0; |
| 1040 | } |
| 1041 | |
| 1042 | static int debug_registers_open(struct inode *inode, struct file *file) |
| 1043 | { |
| 1044 | file->private_data = alloc_buffer(inode->i_private, |
| 1045 | fill_registers_buffer); |
| 1046 | |
| 1047 | return file->private_data ? 0 : -ENOMEM; |
| 1048 | } |
| 1049 | |
| 1050 | static inline void create_debug_files (struct ehci_hcd *ehci) |
| 1051 | { |
| 1052 | struct usb_bus *bus = &ehci_to_hcd(ehci)->self; |
| 1053 | |
| 1054 | ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); |
| 1055 | if (!ehci->debug_dir) |
| 1056 | return; |
| 1057 | |
| 1058 | if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, |
| 1059 | &debug_async_fops)) |
| 1060 | goto file_error; |
| 1061 | |
| 1062 | if (!debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus, |
| 1063 | &debug_bandwidth_fops)) |
| 1064 | goto file_error; |
| 1065 | |
| 1066 | if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, |
| 1067 | &debug_periodic_fops)) |
| 1068 | goto file_error; |
| 1069 | |
| 1070 | if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, |
| 1071 | &debug_registers_fops)) |
| 1072 | goto file_error; |
| 1073 | |
| 1074 | return; |
| 1075 | |
| 1076 | file_error: |
| 1077 | debugfs_remove_recursive(ehci->debug_dir); |
| 1078 | } |
| 1079 | |
| 1080 | static inline void remove_debug_files (struct ehci_hcd *ehci) |
| 1081 | { |
| 1082 | debugfs_remove_recursive(ehci->debug_dir); |
| 1083 | } |
| 1084 | |
| 1085 | #endif /* STUB_DEBUG_FILES */ |