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 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 static int xhci_port_bw_show(struct xhci_hcd *xhci, u8 dev_speed, 635 struct seq_file *s) 636 { 637 unsigned int num_ports; 638 unsigned int i; 639 int ret; 640 struct xhci_container_ctx *ctx; 641 struct usb_hcd *hcd = xhci_to_hcd(xhci); 642 struct device *dev = hcd->self.controller; 643 644 ret = pm_runtime_get_sync(dev); 645 if (ret < 0) 646 return ret; 647 648 num_ports = HCS_MAX_PORTS(xhci->hcs_params1); 649 650 ctx = xhci_alloc_port_bw_ctx(xhci, 0); 651 if (!ctx) { 652 pm_runtime_put_sync(dev); 653 return -ENOMEM; 654 } 655 656 /* get roothub port bandwidth */ 657 ret = xhci_get_port_bandwidth(xhci, ctx, dev_speed); 658 if (ret) 659 goto err_out; 660 661 /* print all roothub ports available bandwidth 662 * refer to xhci rev1_2 protocol 6.2.6 , byte 0 is reserved 663 */ 664 for (i = 1; i < num_ports+1; i++) 665 seq_printf(s, "port[%d] available bw: %d%%.\n", i, 666 ctx->bytes[i]); 667 err_out: 668 pm_runtime_put_sync(dev); 669 xhci_free_port_bw_ctx(xhci, ctx); 670 return ret; 671 } 672 673 static int xhci_ss_bw_show(struct seq_file *s, void *unused) 674 { 675 int ret; 676 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 677 678 ret = xhci_port_bw_show(xhci, USB_SPEED_SUPER, s); 679 return ret; 680 } 681 682 static int xhci_hs_bw_show(struct seq_file *s, void *unused) 683 { 684 int ret; 685 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 686 687 ret = xhci_port_bw_show(xhci, USB_SPEED_HIGH, s); 688 return ret; 689 } 690 691 static int xhci_fs_bw_show(struct seq_file *s, void *unused) 692 { 693 int ret; 694 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 695 696 ret = xhci_port_bw_show(xhci, USB_SPEED_FULL, s); 697 return ret; 698 } 699 700 static struct xhci_file_map bw_context_files[] = { 701 {"SS_BW", xhci_ss_bw_show, }, 702 {"HS_BW", xhci_hs_bw_show, }, 703 {"FS_BW", xhci_fs_bw_show, }, 704 }; 705 706 static int bw_context_open(struct inode *inode, struct file *file) 707 { 708 int i; 709 struct xhci_file_map *f_map; 710 const char *file_name = file_dentry(file)->d_iname; 711 712 for (i = 0; i < ARRAY_SIZE(bw_context_files); i++) { 713 f_map = &bw_context_files[i]; 714 715 if (strcmp(f_map->name, file_name) == 0) 716 break; 717 } 718 719 return single_open(file, f_map->show, inode->i_private); 720 } 721 722 static const struct file_operations bw_fops = { 723 .open = bw_context_open, 724 .read = seq_read, 725 .llseek = seq_lseek, 726 .release = single_release, 727 }; 728 729 static void xhci_debugfs_create_bandwidth(struct xhci_hcd *xhci, 730 struct dentry *parent) 731 { 732 parent = debugfs_create_dir("port_bandwidth", parent); 733 734 xhci_debugfs_create_files(xhci, bw_context_files, 735 ARRAY_SIZE(bw_context_files), 736 xhci, 737 parent, &bw_fops); 738 } 739 740 void xhci_debugfs_init(struct xhci_hcd *xhci) 741 { 742 struct device *dev = xhci_to_hcd(xhci)->self.controller; 743 744 xhci->debugfs_root = debugfs_create_dir(dev_name(dev), 745 xhci_debugfs_root); 746 747 INIT_LIST_HEAD(&xhci->regset_list); 748 749 xhci_debugfs_regset(xhci, 750 0, 751 xhci_cap_regs, ARRAY_SIZE(xhci_cap_regs), 752 xhci->debugfs_root, "reg-cap"); 753 754 xhci_debugfs_regset(xhci, 755 HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)), 756 xhci_op_regs, ARRAY_SIZE(xhci_op_regs), 757 xhci->debugfs_root, "reg-op"); 758 759 xhci_debugfs_regset(xhci, 760 readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK, 761 xhci_runtime_regs, ARRAY_SIZE(xhci_runtime_regs), 762 xhci->debugfs_root, "reg-runtime"); 763 764 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY, 765 xhci_extcap_legsup, 766 ARRAY_SIZE(xhci_extcap_legsup), 767 "reg-ext-legsup"); 768 769 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_PROTOCOL, 770 xhci_extcap_protocol, 771 ARRAY_SIZE(xhci_extcap_protocol), 772 "reg-ext-protocol"); 773 774 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_DEBUG, 775 xhci_extcap_dbc, 776 ARRAY_SIZE(xhci_extcap_dbc), 777 "reg-ext-dbc"); 778 779 xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, 780 "command-ring", 781 xhci->debugfs_root); 782 783 xhci_debugfs_create_ring_dir(xhci, &xhci->interrupters[0]->event_ring, 784 "event-ring", 785 xhci->debugfs_root); 786 787 xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); 788 789 xhci_debugfs_create_ports(xhci, xhci->debugfs_root); 790 791 xhci_debugfs_create_bandwidth(xhci, xhci->debugfs_root); 792 } 793 794 void xhci_debugfs_exit(struct xhci_hcd *xhci) 795 { 796 struct xhci_regset *rgs, *tmp; 797 798 debugfs_remove_recursive(xhci->debugfs_root); 799 xhci->debugfs_root = NULL; 800 xhci->debugfs_slots = NULL; 801 802 list_for_each_entry_safe(rgs, tmp, &xhci->regset_list, list) 803 xhci_debugfs_free_regset(rgs); 804 } 805 806 void __init xhci_debugfs_create_root(void) 807 { 808 xhci_debugfs_root = debugfs_create_dir("xhci", usb_debug_root); 809 } 810 811 void __exit xhci_debugfs_remove_root(void) 812 { 813 debugfs_remove_recursive(xhci_debugfs_root); 814 xhci_debugfs_root = NULL; 815 } 816