drivers/usb/host/xhci-debugfs.c

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