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 regset->dev = hcd->self.controller; 137 138 debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset); 139 } 140 141 static void xhci_debugfs_extcap_regset(struct xhci_hcd *xhci, int cap_id, 142 const struct debugfs_reg32 *regs, 143 size_t n, const char *cap_name) 144 { 145 u32 offset; 146 int index = 0; 147 size_t psic, nregs = n; 148 void __iomem *base = &xhci->cap_regs->hc_capbase; 149 150 offset = xhci_find_next_ext_cap(base, 0, cap_id); 151 while (offset) { 152 if (cap_id == XHCI_EXT_CAPS_PROTOCOL) { 153 psic = XHCI_EXT_PORT_PSIC(readl(base + offset + 8)); 154 nregs = min(4 + psic, n); 155 } 156 157 xhci_debugfs_regset(xhci, offset, regs, nregs, 158 xhci->debugfs_root, "%s:%02d", 159 cap_name, index); 160 offset = xhci_find_next_ext_cap(base, offset, cap_id); 161 index++; 162 } 163 } 164 165 static int xhci_ring_enqueue_show(struct seq_file *s, void *unused) 166 { 167 dma_addr_t dma; 168 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 169 170 dma = xhci_trb_virt_to_dma(ring->enq_seg, ring->enqueue); 171 seq_printf(s, "%pad\n", &dma); 172 173 return 0; 174 } 175 176 static int xhci_ring_dequeue_show(struct seq_file *s, void *unused) 177 { 178 dma_addr_t dma; 179 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 180 181 dma = xhci_trb_virt_to_dma(ring->deq_seg, ring->dequeue); 182 seq_printf(s, "%pad\n", &dma); 183 184 return 0; 185 } 186 187 static int xhci_ring_cycle_show(struct seq_file *s, void *unused) 188 { 189 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 190 191 seq_printf(s, "%d\n", ring->cycle_state); 192 193 return 0; 194 } 195 196 static void xhci_ring_dump_segment(struct seq_file *s, 197 struct xhci_segment *seg) 198 { 199 int i; 200 dma_addr_t dma; 201 union xhci_trb *trb; 202 char str[XHCI_MSG_MAX]; 203 204 for (i = 0; i < TRBS_PER_SEGMENT; i++) { 205 trb = &seg->trbs[i]; 206 dma = seg->dma + i * sizeof(*trb); 207 seq_printf(s, "%2u %pad: %s\n", seg->num, &dma, 208 xhci_decode_trb(str, XHCI_MSG_MAX, le32_to_cpu(trb->generic.field[0]), 209 le32_to_cpu(trb->generic.field[1]), 210 le32_to_cpu(trb->generic.field[2]), 211 le32_to_cpu(trb->generic.field[3]))); 212 } 213 } 214 215 static int xhci_ring_trb_show(struct seq_file *s, void *unused) 216 { 217 struct xhci_ring *ring = *(struct xhci_ring **)s->private; 218 struct xhci_segment *seg = ring->first_seg; 219 220 xhci_for_each_ring_seg(ring->first_seg, seg) 221 xhci_ring_dump_segment(s, seg); 222 223 return 0; 224 } 225 226 static struct xhci_file_map ring_files[] = { 227 {"enqueue", xhci_ring_enqueue_show, }, 228 {"dequeue", xhci_ring_dequeue_show, }, 229 {"cycle", xhci_ring_cycle_show, }, 230 {"trbs", xhci_ring_trb_show, }, 231 }; 232 233 static int xhci_ring_open(struct inode *inode, struct file *file) 234 { 235 int i; 236 struct xhci_file_map *f_map; 237 const char *file_name = file_dentry(file)->d_iname; 238 239 for (i = 0; i < ARRAY_SIZE(ring_files); i++) { 240 f_map = &ring_files[i]; 241 242 if (strcmp(f_map->name, file_name) == 0) 243 break; 244 } 245 246 return single_open(file, f_map->show, inode->i_private); 247 } 248 249 static const struct file_operations xhci_ring_fops = { 250 .open = xhci_ring_open, 251 .read = seq_read, 252 .llseek = seq_lseek, 253 .release = single_release, 254 }; 255 256 static int xhci_slot_context_show(struct seq_file *s, void *unused) 257 { 258 struct xhci_hcd *xhci; 259 struct xhci_slot_ctx *slot_ctx; 260 struct xhci_slot_priv *priv = s->private; 261 struct xhci_virt_device *dev = priv->dev; 262 char str[XHCI_MSG_MAX]; 263 264 xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); 265 slot_ctx = xhci_get_slot_ctx(xhci, dev->out_ctx); 266 seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma, 267 xhci_decode_slot_context(str, 268 le32_to_cpu(slot_ctx->dev_info), 269 le32_to_cpu(slot_ctx->dev_info2), 270 le32_to_cpu(slot_ctx->tt_info), 271 le32_to_cpu(slot_ctx->dev_state))); 272 273 return 0; 274 } 275 276 static int xhci_endpoint_context_show(struct seq_file *s, void *unused) 277 { 278 int ep_index; 279 dma_addr_t dma; 280 struct xhci_hcd *xhci; 281 struct xhci_ep_ctx *ep_ctx; 282 struct xhci_slot_priv *priv = s->private; 283 struct xhci_virt_device *dev = priv->dev; 284 char str[XHCI_MSG_MAX]; 285 286 xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus)); 287 288 for (ep_index = 0; ep_index < 31; ep_index++) { 289 ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index); 290 dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params); 291 seq_printf(s, "%pad: %s, virt_state:%#x\n", &dma, 292 xhci_decode_ep_context(str, 293 le32_to_cpu(ep_ctx->ep_info), 294 le32_to_cpu(ep_ctx->ep_info2), 295 le64_to_cpu(ep_ctx->deq), 296 le32_to_cpu(ep_ctx->tx_info)), 297 dev->eps[ep_index].ep_state); 298 } 299 300 return 0; 301 } 302 303 static int xhci_device_name_show(struct seq_file *s, void *unused) 304 { 305 struct xhci_slot_priv *priv = s->private; 306 struct xhci_virt_device *dev = priv->dev; 307 308 seq_printf(s, "%s\n", dev_name(&dev->udev->dev)); 309 310 return 0; 311 } 312 313 static struct xhci_file_map context_files[] = { 314 {"name", xhci_device_name_show, }, 315 {"slot-context", xhci_slot_context_show, }, 316 {"ep-context", xhci_endpoint_context_show, }, 317 }; 318 319 static int xhci_context_open(struct inode *inode, struct file *file) 320 { 321 int i; 322 struct xhci_file_map *f_map; 323 const char *file_name = file_dentry(file)->d_iname; 324 325 for (i = 0; i < ARRAY_SIZE(context_files); i++) { 326 f_map = &context_files[i]; 327 328 if (strcmp(f_map->name, file_name) == 0) 329 break; 330 } 331 332 return single_open(file, f_map->show, inode->i_private); 333 } 334 335 static const struct file_operations xhci_context_fops = { 336 .open = xhci_context_open, 337 .read = seq_read, 338 .llseek = seq_lseek, 339 .release = single_release, 340 }; 341 342 343 344 static int xhci_portsc_show(struct seq_file *s, void *unused) 345 { 346 struct xhci_port *port = s->private; 347 u32 portsc; 348 char str[XHCI_MSG_MAX]; 349 350 portsc = readl(port->addr); 351 seq_printf(s, "%s\n", xhci_decode_portsc(str, portsc)); 352 353 return 0; 354 } 355 356 static int xhci_port_open(struct inode *inode, struct file *file) 357 { 358 return single_open(file, xhci_portsc_show, inode->i_private); 359 } 360 361 static ssize_t xhci_port_write(struct file *file, const char __user *ubuf, 362 size_t count, loff_t *ppos) 363 { 364 struct seq_file *s = file->private_data; 365 struct xhci_port *port = s->private; 366 struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); 367 char buf[32]; 368 u32 portsc; 369 unsigned long flags; 370 371 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 372 return -EFAULT; 373 374 if (!strncmp(buf, "compliance", 10)) { 375 /* If CTC is clear, compliance is enabled by default */ 376 if (!HCC2_CTC(xhci->hcc_params2)) 377 return count; 378 spin_lock_irqsave(&xhci->lock, flags); 379 /* compliance mode can only be enabled on ports in RxDetect */ 380 portsc = readl(port->addr); 381 if ((portsc & PORT_PLS_MASK) != XDEV_RXDETECT) { 382 spin_unlock_irqrestore(&xhci->lock, flags); 383 return -EPERM; 384 } 385 portsc = xhci_port_state_to_neutral(portsc); 386 portsc &= ~PORT_PLS_MASK; 387 portsc |= PORT_LINK_STROBE | XDEV_COMP_MODE; 388 writel(portsc, port->addr); 389 spin_unlock_irqrestore(&xhci->lock, flags); 390 } else { 391 return -EINVAL; 392 } 393 return count; 394 } 395 396 static const struct file_operations port_fops = { 397 .open = xhci_port_open, 398 .write = xhci_port_write, 399 .read = seq_read, 400 .llseek = seq_lseek, 401 .release = single_release, 402 }; 403 404 static void xhci_debugfs_create_files(struct xhci_hcd *xhci, 405 struct xhci_file_map *files, 406 size_t nentries, void *data, 407 struct dentry *parent, 408 const struct file_operations *fops) 409 { 410 int i; 411 412 for (i = 0; i < nentries; i++) 413 debugfs_create_file(files[i].name, 0444, parent, data, fops); 414 } 415 416 static struct dentry *xhci_debugfs_create_ring_dir(struct xhci_hcd *xhci, 417 struct xhci_ring **ring, 418 const char *name, 419 struct dentry *parent) 420 { 421 struct dentry *dir; 422 423 dir = debugfs_create_dir(name, parent); 424 xhci_debugfs_create_files(xhci, ring_files, ARRAY_SIZE(ring_files), 425 ring, dir, &xhci_ring_fops); 426 427 return dir; 428 } 429 430 static void xhci_debugfs_create_context_files(struct xhci_hcd *xhci, 431 struct dentry *parent, 432 int slot_id) 433 { 434 struct xhci_virt_device *dev = xhci->devs[slot_id]; 435 436 xhci_debugfs_create_files(xhci, context_files, 437 ARRAY_SIZE(context_files), 438 dev->debugfs_private, 439 parent, &xhci_context_fops); 440 } 441 442 void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci, 443 struct xhci_virt_device *dev, 444 int ep_index) 445 { 446 struct xhci_ep_priv *epriv; 447 struct xhci_slot_priv *spriv = dev->debugfs_private; 448 449 if (!spriv) 450 return; 451 452 if (spriv->eps[ep_index]) 453 return; 454 455 epriv = kzalloc(sizeof(*epriv), GFP_KERNEL); 456 if (!epriv) 457 return; 458 459 epriv->show_ring = dev->eps[ep_index].ring; 460 461 snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index); 462 epriv->root = xhci_debugfs_create_ring_dir(xhci, 463 &epriv->show_ring, 464 epriv->name, 465 spriv->root); 466 spriv->eps[ep_index] = epriv; 467 } 468 469 void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci, 470 struct xhci_virt_device *dev, 471 int ep_index) 472 { 473 struct xhci_ep_priv *epriv; 474 struct xhci_slot_priv *spriv = dev->debugfs_private; 475 476 if (!spriv || !spriv->eps[ep_index]) 477 return; 478 479 epriv = spriv->eps[ep_index]; 480 debugfs_remove_recursive(epriv->root); 481 spriv->eps[ep_index] = NULL; 482 kfree(epriv); 483 } 484 485 static int xhci_stream_id_show(struct seq_file *s, void *unused) 486 { 487 struct xhci_ep_priv *epriv = s->private; 488 489 if (!epriv->stream_info) 490 return -EPERM; 491 492 seq_printf(s, "Show stream ID %d trb ring, supported [1 - %d]\n", 493 epriv->stream_id, epriv->stream_info->num_streams - 1); 494 495 return 0; 496 } 497 498 static int xhci_stream_id_open(struct inode *inode, struct file *file) 499 { 500 return single_open(file, xhci_stream_id_show, inode->i_private); 501 } 502 503 static ssize_t xhci_stream_id_write(struct file *file, const char __user *ubuf, 504 size_t count, loff_t *ppos) 505 { 506 struct seq_file *s = file->private_data; 507 struct xhci_ep_priv *epriv = s->private; 508 int ret; 509 u16 stream_id; /* MaxPStreams + 1 <= 16 */ 510 511 if (!epriv->stream_info) 512 return -EPERM; 513 514 /* Decimal number */ 515 ret = kstrtou16_from_user(ubuf, count, 10, &stream_id); 516 if (ret) 517 return ret; 518 519 if (stream_id == 0 || stream_id >= epriv->stream_info->num_streams) 520 return -EINVAL; 521 522 epriv->stream_id = stream_id; 523 epriv->show_ring = epriv->stream_info->stream_rings[stream_id]; 524 525 return count; 526 } 527 528 static const struct file_operations stream_id_fops = { 529 .open = xhci_stream_id_open, 530 .write = xhci_stream_id_write, 531 .read = seq_read, 532 .llseek = seq_lseek, 533 .release = single_release, 534 }; 535 536 static int xhci_stream_context_array_show(struct seq_file *s, void *unused) 537 { 538 struct xhci_ep_priv *epriv = s->private; 539 struct xhci_stream_ctx *stream_ctx; 540 dma_addr_t dma; 541 int id; 542 543 if (!epriv->stream_info) 544 return -EPERM; 545 546 seq_printf(s, "Allocated %d streams and %d stream context array entries\n", 547 epriv->stream_info->num_streams, 548 epriv->stream_info->num_stream_ctxs); 549 550 for (id = 0; id < epriv->stream_info->num_stream_ctxs; id++) { 551 stream_ctx = epriv->stream_info->stream_ctx_array + id; 552 dma = epriv->stream_info->ctx_array_dma + id * 16; 553 if (id < epriv->stream_info->num_streams) 554 seq_printf(s, "%pad stream id %d deq %016llx\n", &dma, 555 id, le64_to_cpu(stream_ctx->stream_ring)); 556 else 557 seq_printf(s, "%pad stream context entry not used deq %016llx\n", 558 &dma, le64_to_cpu(stream_ctx->stream_ring)); 559 } 560 561 return 0; 562 } 563 DEFINE_SHOW_ATTRIBUTE(xhci_stream_context_array); 564 565 void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci, 566 struct xhci_virt_device *dev, 567 int ep_index) 568 { 569 struct xhci_slot_priv *spriv = dev->debugfs_private; 570 struct xhci_ep_priv *epriv; 571 572 if (!spriv || !spriv->eps[ep_index] || 573 !dev->eps[ep_index].stream_info) 574 return; 575 576 epriv = spriv->eps[ep_index]; 577 epriv->stream_info = dev->eps[ep_index].stream_info; 578 579 /* Show trb ring of stream ID 1 by default */ 580 epriv->stream_id = 1; 581 epriv->show_ring = epriv->stream_info->stream_rings[1]; 582 debugfs_create_file("stream_id", 0644, 583 epriv->root, epriv, 584 &stream_id_fops); 585 debugfs_create_file("stream_context_array", 0444, 586 epriv->root, epriv, 587 &xhci_stream_context_array_fops); 588 } 589 590 void xhci_debugfs_create_slot(struct xhci_hcd *xhci, int slot_id) 591 { 592 struct xhci_slot_priv *priv; 593 struct xhci_virt_device *dev = xhci->devs[slot_id]; 594 595 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 596 if (!priv) 597 return; 598 599 snprintf(priv->name, sizeof(priv->name), "%02d", slot_id); 600 priv->root = debugfs_create_dir(priv->name, xhci->debugfs_slots); 601 priv->dev = dev; 602 dev->debugfs_private = priv; 603 604 xhci_debugfs_create_ring_dir(xhci, &dev->eps[0].ring, 605 "ep00", priv->root); 606 607 xhci_debugfs_create_context_files(xhci, priv->root, slot_id); 608 } 609 610 void xhci_debugfs_remove_slot(struct xhci_hcd *xhci, int slot_id) 611 { 612 int i; 613 struct xhci_slot_priv *priv; 614 struct xhci_virt_device *dev = xhci->devs[slot_id]; 615 616 if (!dev || !dev->debugfs_private) 617 return; 618 619 priv = dev->debugfs_private; 620 621 debugfs_remove_recursive(priv->root); 622 623 for (i = 0; i < 31; i++) 624 kfree(priv->eps[i]); 625 626 kfree(priv); 627 dev->debugfs_private = NULL; 628 } 629 630 static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, 631 struct dentry *parent) 632 { 633 unsigned int num_ports; 634 char port_name[8]; 635 struct xhci_port *port; 636 struct dentry *dir; 637 638 num_ports = HCS_MAX_PORTS(xhci->hcs_params1); 639 640 parent = debugfs_create_dir("ports", parent); 641 642 while (num_ports--) { 643 scnprintf(port_name, sizeof(port_name), "port%02d", 644 num_ports + 1); 645 dir = debugfs_create_dir(port_name, parent); 646 port = &xhci->hw_ports[num_ports]; 647 debugfs_create_file("portsc", 0644, dir, port, &port_fops); 648 } 649 } 650 651 void xhci_debugfs_init(struct xhci_hcd *xhci) 652 { 653 struct device *dev = xhci_to_hcd(xhci)->self.controller; 654 655 xhci->debugfs_root = debugfs_create_dir(dev_name(dev), 656 xhci_debugfs_root); 657 658 INIT_LIST_HEAD(&xhci->regset_list); 659 660 xhci_debugfs_regset(xhci, 661 0, 662 xhci_cap_regs, ARRAY_SIZE(xhci_cap_regs), 663 xhci->debugfs_root, "reg-cap"); 664 665 xhci_debugfs_regset(xhci, 666 HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)), 667 xhci_op_regs, ARRAY_SIZE(xhci_op_regs), 668 xhci->debugfs_root, "reg-op"); 669 670 xhci_debugfs_regset(xhci, 671 readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK, 672 xhci_runtime_regs, ARRAY_SIZE(xhci_runtime_regs), 673 xhci->debugfs_root, "reg-runtime"); 674 675 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY, 676 xhci_extcap_legsup, 677 ARRAY_SIZE(xhci_extcap_legsup), 678 "reg-ext-legsup"); 679 680 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_PROTOCOL, 681 xhci_extcap_protocol, 682 ARRAY_SIZE(xhci_extcap_protocol), 683 "reg-ext-protocol"); 684 685 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_DEBUG, 686 xhci_extcap_dbc, 687 ARRAY_SIZE(xhci_extcap_dbc), 688 "reg-ext-dbc"); 689 690 xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, 691 "command-ring", 692 xhci->debugfs_root); 693 694 xhci_debugfs_create_ring_dir(xhci, &xhci->interrupters[0]->event_ring, 695 "event-ring", 696 xhci->debugfs_root); 697 698 xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); 699 700 xhci_debugfs_create_ports(xhci, xhci->debugfs_root); 701 } 702 703 void xhci_debugfs_exit(struct xhci_hcd *xhci) 704 { 705 struct xhci_regset *rgs, *tmp; 706 707 debugfs_remove_recursive(xhci->debugfs_root); 708 xhci->debugfs_root = NULL; 709 xhci->debugfs_slots = NULL; 710 711 list_for_each_entry_safe(rgs, tmp, &xhci->regset_list, list) 712 xhci_debugfs_free_regset(rgs); 713 } 714 715 void __init xhci_debugfs_create_root(void) 716 { 717 xhci_debugfs_root = debugfs_create_dir("xhci", usb_debug_root); 718 } 719 720 void __exit xhci_debugfs_remove_root(void) 721 { 722 debugfs_remove_recursive(xhci_debugfs_root); 723 xhci_debugfs_root = NULL; 724 } 725