1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * xhci-debugfs.c - xHCI debugfs interface 4 * 5 * Copyright (C) 2017 Intel Corporation 6 * 7 * Author: Lu Baolu <baolu.lu@linux.intel.com> 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/uaccess.h> 12 13 #include "xhci.h" 14 #include "xhci-debugfs.h" 15 16 static const struct debugfs_reg32 xhci_cap_regs[] = { 17 dump_register(CAPLENGTH), 18 dump_register(HCSPARAMS1), 19 dump_register(HCSPARAMS2), 20 dump_register(HCSPARAMS3), 21 dump_register(HCCPARAMS1), 22 dump_register(DOORBELLOFF), 23 dump_register(RUNTIMEOFF), 24 dump_register(HCCPARAMS2), 25 }; 26 27 static const struct debugfs_reg32 xhci_op_regs[] = { 28 dump_register(USBCMD), 29 dump_register(USBSTS), 30 dump_register(PAGESIZE), 31 dump_register(DNCTRL), 32 dump_register(CRCR), 33 dump_register(DCBAAP_LOW), 34 dump_register(DCBAAP_HIGH), 35 dump_register(CONFIG), 36 }; 37 38 static const struct debugfs_reg32 xhci_runtime_regs[] = { 39 dump_register(MFINDEX), 40 dump_register(IR0_IMAN), 41 dump_register(IR0_IMOD), 42 dump_register(IR0_ERSTSZ), 43 dump_register(IR0_ERSTBA_LOW), 44 dump_register(IR0_ERSTBA_HIGH), 45 dump_register(IR0_ERDP_LOW), 46 dump_register(IR0_ERDP_HIGH), 47 }; 48 49 static const struct debugfs_reg32 xhci_extcap_legsup[] = { 50 dump_register(EXTCAP_USBLEGSUP), 51 dump_register(EXTCAP_USBLEGCTLSTS), 52 }; 53 54 static const struct debugfs_reg32 xhci_extcap_protocol[] = { 55 dump_register(EXTCAP_REVISION), 56 dump_register(EXTCAP_NAME), 57 dump_register(EXTCAP_PORTINFO), 58 dump_register(EXTCAP_PORTTYPE), 59 dump_register(EXTCAP_MANTISSA1), 60 dump_register(EXTCAP_MANTISSA2), 61 dump_register(EXTCAP_MANTISSA3), 62 dump_register(EXTCAP_MANTISSA4), 63 dump_register(EXTCAP_MANTISSA5), 64 dump_register(EXTCAP_MANTISSA6), 65 }; 66 67 static const struct debugfs_reg32 xhci_extcap_dbc[] = { 68 dump_register(EXTCAP_DBC_CAPABILITY), 69 dump_register(EXTCAP_DBC_DOORBELL), 70 dump_register(EXTCAP_DBC_ERSTSIZE), 71 dump_register(EXTCAP_DBC_ERST_LOW), 72 dump_register(EXTCAP_DBC_ERST_HIGH), 73 dump_register(EXTCAP_DBC_ERDP_LOW), 74 dump_register(EXTCAP_DBC_ERDP_HIGH), 75 dump_register(EXTCAP_DBC_CONTROL), 76 dump_register(EXTCAP_DBC_STATUS), 77 dump_register(EXTCAP_DBC_PORTSC), 78 dump_register(EXTCAP_DBC_CONT_LOW), 79 dump_register(EXTCAP_DBC_CONT_HIGH), 80 dump_register(EXTCAP_DBC_DEVINFO1), 81 dump_register(EXTCAP_DBC_DEVINFO2), 82 }; 83 84 static struct dentry *xhci_debugfs_root; 85 86 static struct xhci_regset *xhci_debugfs_alloc_regset(struct xhci_hcd *xhci) 87 { 88 struct xhci_regset *regset; 89 90 regset = kzalloc(sizeof(*regset), GFP_KERNEL); 91 if (!regset) 92 return NULL; 93 94 /* 95 * The allocation and free of regset are executed in order. 96 * We needn't a lock here. 97 */ 98 INIT_LIST_HEAD(®set->list); 99 list_add_tail(®set->list, &xhci->regset_list); 100 101 return regset; 102 } 103 104 static void xhci_debugfs_free_regset(struct xhci_regset *regset) 105 { 106 if (!regset) 107 return; 108 109 list_del(®set->list); 110 kfree(regset); 111 } 112 113 __printf(6, 7) 114 static void xhci_debugfs_regset(struct xhci_hcd *xhci, u32 base, 115 const struct debugfs_reg32 *regs, 116 size_t nregs, struct dentry *parent, 117 const char *fmt, ...) 118 { 119 struct xhci_regset *rgs; 120 va_list args; 121 struct debugfs_regset32 *regset; 122 struct usb_hcd *hcd = xhci_to_hcd(xhci); 123 124 rgs = xhci_debugfs_alloc_regset(xhci); 125 if (!rgs) 126 return; 127 128 va_start(args, fmt); 129 vsnprintf(rgs->name, sizeof(rgs->name), fmt, args); 130 va_end(args); 131 132 regset = &rgs->regset; 133 regset->regs = regs; 134 regset->nregs = nregs; 135 regset->base = hcd->regs + base; 136 137 debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); 138 } 139 140 static void xhci_debugfs_extcap_regset(struct xhci_hcd *xhci, int cap_id, 141 const struct debugfs_reg32 *regs, 142 size_t n, const char *cap_name) 143 { 144 u32 offset; 145 int index = 0; 146 size_t psic, nregs = n; 147 void __iomem *base = &xhci->cap_regs->hc_capbase; 148 149 offset = xhci_find_next_ext_cap(base, 0, cap_id); 150 while (offset) { 151 if (cap_id == XHCI_EXT_CAPS_PROTOCOL) { 152 psic = XHCI_EXT_PORT_PSIC(readl(base + offset + 8)); 153 nregs = min(4 + psic, n); 154 } 155 156 xhci_debugfs_regset(xhci, offset, regs, nregs, 157 xhci->debugfs_root, "%s:%02d", 158 cap_name, index); 159 offset = xhci_find_next_ext_cap(base, offset, cap_id); 160 index++; 161 } 162 } 163 164 static int xhci_ring_enqueue_show(struct seq_file *s, void *unused) 165 { 166 dma_addr_t dma; 167 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 168 169 dma = xhci_trb_virt_to_dma(ring->enq_seg, ring->enqueue); 170 seq_printf(s, "%pad\n", &dma); 171 172 return 0; 173 } 174 175 static int xhci_ring_dequeue_show(struct seq_file *s, void *unused) 176 { 177 dma_addr_t dma; 178 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 179 180 dma = xhci_trb_virt_to_dma(ring->deq_seg, ring->dequeue); 181 seq_printf(s, "%pad\n", &dma); 182 183 return 0; 184 } 185 186 static int xhci_ring_cycle_show(struct seq_file *s, void *unused) 187 { 188 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 189 190 seq_printf(s, "%d\n", ring->cycle_state); 191 192 return 0; 193 } 194 195 static void xhci_ring_dump_segment(struct seq_file *s, 196 struct xhci_segment *seg) 197 { 198 int i; 199 dma_addr_t dma; 200 union xhci_trb *trb; 201 char str[XHCI_MSG_MAX]; 202 203 for (i = 0; i < TRBS_PER_SEGMENT; i++) { 204 trb = &seg->trbs[i]; 205 dma = seg->dma + i * sizeof(*trb); 206 seq_printf(s, "%pad: %s\n", &dma, 207 xhci_decode_trb(str, XHCI_MSG_MAX, le32_to_cpu(trb->generic.field[0]), 208 le32_to_cpu(trb->generic.field[1]), 209 le32_to_cpu(trb->generic.field[2]), 210 le32_to_cpu(trb->generic.field[3]))); 211 } 212 } 213 214 static int xhci_ring_trb_show(struct seq_file *s, void *unused) 215 { 216 int i; 217 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 218 struct xhci_segment *seg = ring->first_seg; 219 220 for (i = 0; i < ring->num_segs; i++) { 221 xhci_ring_dump_segment(s, seg); 222 seg = seg->next; 223 } 224 225 return 0; 226 } 227 228 static struct xhci_file_map ring_files[] = { 229 {"enqueue", xhci_ring_enqueue_show, }, 230 {"dequeue", xhci_ring_dequeue_show, }, 231 {"cycle", xhci_ring_cycle_show, }, 232 {"trbs", xhci_ring_trb_show, }, 233 }; 234 235 static int xhci_ring_open(struct inode *inode, struct file *file) 236 { 237 int i; 238 struct xhci_file_map *f_map; 239 const char *file_name = file_dentry(file)->d_iname; 240 241 for (i = 0; i < ARRAY_SIZE(ring_files); i++) { 242 f_map = &ring_files[i]; 243 244 if (strcmp(f_map->name, file_name) == 0) 245 break; 246 } 247 248 return single_open(file, f_map->show, inode->i_private); 249 } 250 251 static const struct file_operations xhci_ring_fops = { 252 .open = xhci_ring_open, 253 .read = seq_read, 254 .llseek = seq_lseek, 255 .release = single_release, 256 }; 257 258 static int xhci_slot_context_show(struct seq_file *s, void *unused) 259 { 260 struct xhci_hcd *xhci; 261 struct xhci_slot_ctx *slot_ctx; 262 struct xhci_slot_priv *priv = s->private; 263 struct xhci_virt_device *dev = priv->dev; 264 char str[XHCI_MSG_MAX]; 265 266 xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); 267 slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); 268 seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma, 269 xhci_decode_slot_context(str, 270 le32_to_cpu(slot_ctx->dev_info), 271 le32_to_cpu(slot_ctx->dev_info2), 272 le32_to_cpu(slot_ctx->tt_info), 273 le32_to_cpu(slot_ctx->dev_state))); 274 275 return 0; 276 } 277 278 static int xhci_endpoint_context_show(struct seq_file *s, void *unused) 279 { 280 int ep_index; 281 dma_addr_t dma; 282 struct xhci_hcd *xhci; 283 struct xhci_ep_ctx *ep_ctx; 284 struct xhci_slot_priv *priv = s->private; 285 struct xhci_virt_device *dev = priv->dev; 286 char str[XHCI_MSG_MAX]; 287 288 xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); 289 290 for (ep_index = 0; ep_index < 31; ep_index++) { 291 ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); 292 dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params); 293 seq_printf(s, "%pad: %s\n", &dma, 294 xhci_decode_ep_context(str, 295 le32_to_cpu(ep_ctx->ep_info), 296 le32_to_cpu(ep_ctx->ep_info2), 297 le64_to_cpu(ep_ctx->deq), 298 le32_to_cpu(ep_ctx->tx_info))); 299 } 300 301 return 0; 302 } 303 304 static int xhci_device_name_show(struct seq_file *s, void *unused) 305 { 306 struct xhci_slot_priv *priv = s->private; 307 struct xhci_virt_device *dev = priv->dev; 308 309 seq_printf(s, "%s\n", dev_name(&dev->udev->dev)); 310 311 return 0; 312 } 313 314 static struct xhci_file_map context_files[] = { 315 {"name", xhci_device_name_show, }, 316 {"slot-context", xhci_slot_context_show, }, 317 {"ep-context", xhci_endpoint_context_show, }, 318 }; 319 320 static int xhci_context_open(struct inode *inode, struct file *file) 321 { 322 int i; 323 struct xhci_file_map *f_map; 324 const char *file_name = file_dentry(file)->d_iname; 325 326 for (i = 0; i < ARRAY_SIZE(context_files); i++) { 327 f_map = &context_files[i]; 328 329 if (strcmp(f_map->name, file_name) == 0) 330 break; 331 } 332 333 return single_open(file, f_map->show, inode->i_private); 334 } 335 336 static const struct file_operations xhci_context_fops = { 337 .open = xhci_context_open, 338 .read = seq_read, 339 .llseek = seq_lseek, 340 .release = single_release, 341 }; 342 343 344 345 static int xhci_portsc_show(struct seq_file *s, void *unused) 346 { 347 struct xhci_port *port = s->private; 348 u32 portsc; 349 char str[XHCI_MSG_MAX]; 350 351 portsc = readl(port->addr); 352 seq_printf(s, "%s\n", xhci_decode_portsc(str, portsc)); 353 354 return 0; 355 } 356 357 static int xhci_port_open(struct inode *inode, struct file *file) 358 { 359 return single_open(file, xhci_portsc_show, inode->i_private); 360 } 361 362 static ssize_t xhci_port_write(struct file *file, const char __user *ubuf, 363 size_t count, loff_t *ppos) 364 { 365 struct seq_file *s = file->private_data; 366 struct xhci_port *port = s->private; 367 struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); 368 char buf[32]; 369 u32 portsc; 370 unsigned long flags; 371 372 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 373 return -EFAULT; 374 375 if (!strncmp(buf, "compliance", 10)) { 376 /* If CTC is clear, compliance is enabled by default */ 377 if (!HCC2_CTC(xhci->hcc_params2)) 378 return count; 379 spin_lock_irqsave(&xhci->lock, flags); 380 /* compliance mode can only be enabled on ports in RxDetect */ 381 portsc = readl(port->addr); 382 if ((portsc & PORT_PLS_MASK) != XDEV_RXDETECT) { 383 spin_unlock_irqrestore(&xhci->lock, flags); 384 return -EPERM; 385 } 386 portsc = xhci_port_state_to_neutral(portsc); 387 portsc &= ~PORT_PLS_MASK; 388 portsc |= PORT_LINK_STROBE | XDEV_COMP_MODE; 389 writel(portsc, port->addr); 390 spin_unlock_irqrestore(&xhci->lock, flags); 391 } else { 392 return -EINVAL; 393 } 394 return count; 395 } 396 397 static const struct file_operations port_fops = { 398 .open = xhci_port_open, 399 .write = xhci_port_write, 400 .read = seq_read, 401 .llseek = seq_lseek, 402 .release = single_release, 403 }; 404 405 static void xhci_debugfs_create_files(struct xhci_hcd *xhci, 406 struct xhci_file_map *files, 407 size_t nentries, void *data, 408 struct dentry *parent, 409 const struct file_operations *fops) 410 { 411 int i; 412 413 for (i = 0; i < nentries; i++) 414 debugfs_create_file(files[i].name, 0444, parent, data, fops); 415 } 416 417 static struct dentry *xhci_debugfs_create_ring_dir(struct xhci_hcd *xhci, 418 struct xhci_ring **ring, 419 const char *name, 420 struct dentry *parent) 421 { 422 struct dentry *dir; 423 424 dir = debugfs_create_dir(name, parent); 425 xhci_debugfs_create_files(xhci, ring_files, ARRAY_SIZE(ring_files), 426 ring, dir, &xhci_ring_fops); 427 428 return dir; 429 } 430 431 static void xhci_debugfs_create_context_files(struct xhci_hcd *xhci, 432 struct dentry *parent, 433 int slot_id) 434 { 435 struct xhci_virt_device *dev = xhci->devs[slot_id]; 436 437 xhci_debugfs_create_files(xhci, context_files, 438 ARRAY_SIZE(context_files), 439 dev->debugfs_private, 440 parent, &xhci_context_fops); 441 } 442 443 void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci, 444 struct xhci_virt_device *dev, 445 int ep_index) 446 { 447 struct xhci_ep_priv *epriv; 448 struct xhci_slot_priv *spriv = dev->debugfs_private; 449 450 if (!spriv) 451 return; 452 453 if (spriv->eps[ep_index]) 454 return; 455 456 epriv = kzalloc(sizeof(*epriv), GFP_KERNEL); 457 if (!epriv) 458 return; 459 460 epriv->show_ring = dev->eps[ep_index].ring; 461 462 snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index); 463 epriv->root = xhci_debugfs_create_ring_dir(xhci, 464 &epriv->show_ring, 465 epriv->name, 466 spriv->root); 467 spriv->eps[ep_index] = epriv; 468 } 469 470 void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci, 471 struct xhci_virt_device *dev, 472 int ep_index) 473 { 474 struct xhci_ep_priv *epriv; 475 struct xhci_slot_priv *spriv = dev->debugfs_private; 476 477 if (!spriv || !spriv->eps[ep_index]) 478 return; 479 480 epriv = spriv->eps[ep_index]; 481 debugfs_remove_recursive(epriv->root); 482 spriv->eps[ep_index] = NULL; 483 kfree(epriv); 484 } 485 486 static int xhci_stream_id_show(struct seq_file *s, void *unused) 487 { 488 struct xhci_ep_priv *epriv = s->private; 489 490 if (!epriv->stream_info) 491 return -EPERM; 492 493 seq_printf(s, "Show stream ID %d trb ring, supported [1 - %d]\n", 494 epriv->stream_id, epriv->stream_info->num_streams - 1); 495 496 return 0; 497 } 498 499 static int xhci_stream_id_open(struct inode *inode, struct file *file) 500 { 501 return single_open(file, xhci_stream_id_show, inode->i_private); 502 } 503 504 static ssize_t xhci_stream_id_write(struct file *file, const char __user *ubuf, 505 size_t count, loff_t *ppos) 506 { 507 struct seq_file *s = file->private_data; 508 struct xhci_ep_priv *epriv = s->private; 509 int ret; 510 u16 stream_id; /* MaxPStreams + 1 <= 16 */ 511 512 if (!epriv->stream_info) 513 return -EPERM; 514 515 /* Decimal number */ 516 ret = kstrtou16_from_user(ubuf, count, 10, &stream_id); 517 if (ret) 518 return ret; 519 520 if (stream_id == 0 || stream_id >= epriv->stream_info->num_streams) 521 return -EINVAL; 522 523 epriv->stream_id = stream_id; 524 epriv->show_ring = epriv->stream_info->stream_rings[stream_id]; 525 526 return count; 527 } 528 529 static const struct file_operations stream_id_fops = { 530 .open = xhci_stream_id_open, 531 .write = xhci_stream_id_write, 532 .read = seq_read, 533 .llseek = seq_lseek, 534 .release = single_release, 535 }; 536 537 static int xhci_stream_context_array_show(struct seq_file *s, void *unused) 538 { 539 struct xhci_ep_priv *epriv = s->private; 540 struct xhci_stream_ctx *stream_ctx; 541 dma_addr_t dma; 542 int id; 543 544 if (!epriv->stream_info) 545 return -EPERM; 546 547 seq_printf(s, "Allocated %d streams and %d stream context array entries\n", 548 epriv->stream_info->num_streams, 549 epriv->stream_info->num_stream_ctxs); 550 551 for (id = 0; id < epriv->stream_info->num_stream_ctxs; id++) { 552 stream_ctx = epriv->stream_info->stream_ctx_array + id; 553 dma = epriv->stream_info->ctx_array_dma + id * 16; 554 if (id < epriv->stream_info->num_streams) 555 seq_printf(s, "%pad stream id %d deq %016llx\n", &dma, 556 id, le64_to_cpu(stream_ctx->stream_ring)); 557 else 558 seq_printf(s, "%pad stream context entry not used deq %016llx\n", 559 &dma, le64_to_cpu(stream_ctx->stream_ring)); 560 } 561 562 return 0; 563 } 564 DEFINE_SHOW_ATTRIBUTE(xhci_stream_context_array); 565 566 void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci, 567 struct xhci_virt_device *dev, 568 int ep_index) 569 { 570 struct xhci_slot_priv *spriv = dev->debugfs_private; 571 struct xhci_ep_priv *epriv; 572 573 if (!spriv || !spriv->eps[ep_index] || 574 !dev->eps[ep_index].stream_info) 575 return; 576 577 epriv = spriv->eps[ep_index]; 578 epriv->stream_info = dev->eps[ep_index].stream_info; 579 580 /* Show trb ring of stream ID 1 by default */ 581 epriv->stream_id = 1; 582 epriv->show_ring = epriv->stream_info->stream_rings[1]; 583 debugfs_create_file("stream_id", 0644, 584 epriv->root, epriv, 585 &stream_id_fops); 586 debugfs_create_file("stream_context_array", 0444, 587 epriv->root, epriv, 588 &xhci_stream_context_array_fops); 589 } 590 591 void xhci_debugfs_create_slot(struct xhci_hcd *xhci, int slot_id) 592 { 593 struct xhci_slot_priv *priv; 594 struct xhci_virt_device *dev = xhci->devs[slot_id]; 595 596 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 597 if (!priv) 598 return; 599 600 snprintf(priv->name, sizeof(priv->name), "%02d", slot_id); 601 priv->root = debugfs_create_dir(priv->name, xhci->debugfs_slots); 602 priv->dev = dev; 603 dev->debugfs_private = priv; 604 605 xhci_debugfs_create_ring_dir(xhci, &dev->eps[0].ring, 606 "ep00", priv->root); 607 608 xhci_debugfs_create_context_files(xhci, priv->root, slot_id); 609 } 610 611 void xhci_debugfs_remove_slot(struct xhci_hcd *xhci, int slot_id) 612 { 613 int i; 614 struct xhci_slot_priv *priv; 615 struct xhci_virt_device *dev = xhci->devs[slot_id]; 616 617 if (!dev || !dev->debugfs_private) 618 return; 619 620 priv = dev->debugfs_private; 621 622 debugfs_remove_recursive(priv->root); 623 624 for (i = 0; i < 31; i++) 625 kfree(priv->eps[i]); 626 627 kfree(priv); 628 dev->debugfs_private = NULL; 629 } 630 631 static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, 632 struct dentry *parent) 633 { 634 unsigned int num_ports; 635 char port_name[8]; 636 struct xhci_port *port; 637 struct dentry *dir; 638 639 num_ports = HCS_MAX_PORTS(xhci->hcs_params1); 640 641 parent = debugfs_create_dir("ports", parent); 642 643 while (num_ports--) { 644 scnprintf(port_name, sizeof(port_name), "port%02d", 645 num_ports + 1); 646 dir = debugfs_create_dir(port_name, parent); 647 port = &xhci->hw_ports[num_ports]; 648 debugfs_create_file("portsc", 0644, dir, port, &port_fops); 649 } 650 } 651 652 void xhci_debugfs_init(struct xhci_hcd *xhci) 653 { 654 struct device *dev = xhci_to_hcd(xhci)->self.controller; 655 656 xhci->debugfs_root = debugfs_create_dir(dev_name(dev), 657 xhci_debugfs_root); 658 659 INIT_LIST_HEAD(&xhci->regset_list); 660 661 xhci_debugfs_regset(xhci, 662 0, 663 xhci_cap_regs, ARRAY_SIZE(xhci_cap_regs), 664 xhci->debugfs_root, "reg-cap"); 665 666 xhci_debugfs_regset(xhci, 667 HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)), 668 xhci_op_regs, ARRAY_SIZE(xhci_op_regs), 669 xhci->debugfs_root, "reg-op"); 670 671 xhci_debugfs_regset(xhci, 672 readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK, 673 xhci_runtime_regs, ARRAY_SIZE(xhci_runtime_regs), 674 xhci->debugfs_root, "reg-runtime"); 675 676 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY, 677 xhci_extcap_legsup, 678 ARRAY_SIZE(xhci_extcap_legsup), 679 "reg-ext-legsup"); 680 681 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_PROTOCOL, 682 xhci_extcap_protocol, 683 ARRAY_SIZE(xhci_extcap_protocol), 684 "reg-ext-protocol"); 685 686 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_DEBUG, 687 xhci_extcap_dbc, 688 ARRAY_SIZE(xhci_extcap_dbc), 689 "reg-ext-dbc"); 690 691 xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, 692 "command-ring", 693 xhci->debugfs_root); 694 695 xhci_debugfs_create_ring_dir(xhci, &xhci->interrupter->event_ring, 696 "event-ring", 697 xhci->debugfs_root); 698 699 xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); 700 701 xhci_debugfs_create_ports(xhci, xhci->debugfs_root); 702 } 703 704 void xhci_debugfs_exit(struct xhci_hcd *xhci) 705 { 706 struct xhci_regset *rgs, *tmp; 707 708 debugfs_remove_recursive(xhci->debugfs_root); 709 xhci->debugfs_root = NULL; 710 xhci->debugfs_slots = NULL; 711 712 list_for_each_entry_safe(rgs, tmp, &xhci->regset_list, list) 713 xhci_debugfs_free_regset(rgs); 714 } 715 716 void __init xhci_debugfs_create_root(void) 717 { 718 xhci_debugfs_root = debugfs_create_dir("xhci", usb_debug_root); 719 } 720 721 void __exit xhci_debugfs_remove_root(void) 722 { 723 debugfs_remove_recursive(xhci_debugfs_root); 724 xhci_debugfs_root = NULL; 725 } 726