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 = xhci_portsc_readl(port); 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 (!(xhci->hcc_params2 & HCC2_CTC)) 359 return count; 360 spin_lock_irqsave(&xhci->lock, flags); 361 /* compliance mode can only be enabled on ports in RxDetect */ 362 portsc = xhci_portsc_readl(port); 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 xhci_portsc_writel(port, portsc); 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 int xhci_portli_show(struct seq_file *s, void *unused) 387 { 388 struct xhci_port *port = s->private; 389 struct xhci_hcd *xhci = hcd_to_xhci(port->rhub->hcd); 390 u32 portli; 391 392 portli = readl(&port->port_reg->portli); 393 394 /* PORTLI fields are valid if port is a USB3 or eUSB2V2 port */ 395 if (port->rhub == &xhci->usb3_rhub) 396 seq_printf(s, "0x%08x LEC=%u RLC=%u TLC=%u\n", portli, 397 PORT_LEC(portli), PORT_RX_LANES(portli), PORT_TX_LANES(portli)); 398 else if (xhci->hcc_params2 & HCC2_E2V2C) 399 seq_printf(s, "0x%08x RDR=%u TDR=%u\n", portli, 400 PORTLI_RDR(portli), PORTLI_TDR(portli)); 401 else 402 seq_printf(s, "0x%08x RsvdP\n", portli); 403 404 return 0; 405 } 406 407 static int xhci_portli_open(struct inode *inode, struct file *file) 408 { 409 return single_open(file, xhci_portli_show, inode->i_private); 410 } 411 412 static const struct file_operations portli_fops = { 413 .open = xhci_portli_open, 414 .read = seq_read, 415 .llseek = seq_lseek, 416 .release = single_release, 417 }; 418 419 static void xhci_debugfs_create_files(struct xhci_hcd *xhci, 420 struct xhci_file_map *files, 421 size_t nentries, void *data, 422 struct dentry *parent, 423 const struct file_operations *fops) 424 { 425 int i; 426 427 for (i = 0; i < nentries; i++) 428 debugfs_create_file_aux(files[i].name, 0444, parent, 429 data, &files[i], fops); 430 } 431 432 static struct dentry *xhci_debugfs_create_ring_dir(struct xhci_hcd *xhci, 433 struct xhci_ring **ring, 434 const char *name, 435 struct dentry *parent) 436 { 437 struct dentry *dir; 438 439 dir = debugfs_create_dir(name, parent); 440 xhci_debugfs_create_files(xhci, ring_files, ARRAY_SIZE(ring_files), 441 ring, dir, &xhci_ring_fops); 442 443 return dir; 444 } 445 446 static void xhci_debugfs_create_context_files(struct xhci_hcd *xhci, 447 struct dentry *parent, 448 int slot_id) 449 { 450 struct xhci_virt_device *dev = xhci->devs[slot_id]; 451 452 xhci_debugfs_create_files(xhci, context_files, 453 ARRAY_SIZE(context_files), 454 dev->debugfs_private, 455 parent, &xhci_context_fops); 456 } 457 458 void xhci_debugfs_create_endpoint(struct xhci_hcd *xhci, 459 struct xhci_virt_device *dev, 460 int ep_index) 461 { 462 struct xhci_ep_priv *epriv; 463 struct xhci_slot_priv *spriv = dev->debugfs_private; 464 465 if (!spriv) 466 return; 467 468 if (spriv->eps[ep_index]) 469 return; 470 471 epriv = kzalloc(sizeof(*epriv), GFP_KERNEL); 472 if (!epriv) 473 return; 474 475 epriv->show_ring = dev->eps[ep_index].ring; 476 477 snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index); 478 epriv->root = xhci_debugfs_create_ring_dir(xhci, 479 &epriv->show_ring, 480 epriv->name, 481 spriv->root); 482 spriv->eps[ep_index] = epriv; 483 } 484 485 void xhci_debugfs_remove_endpoint(struct xhci_hcd *xhci, 486 struct xhci_virt_device *dev, 487 int ep_index) 488 { 489 struct xhci_ep_priv *epriv; 490 struct xhci_slot_priv *spriv = dev->debugfs_private; 491 492 if (!spriv || !spriv->eps[ep_index]) 493 return; 494 495 epriv = spriv->eps[ep_index]; 496 debugfs_remove_recursive(epriv->root); 497 spriv->eps[ep_index] = NULL; 498 kfree(epriv); 499 } 500 501 static int xhci_stream_id_show(struct seq_file *s, void *unused) 502 { 503 struct xhci_ep_priv *epriv = s->private; 504 505 if (!epriv->stream_info) 506 return -EPERM; 507 508 seq_printf(s, "Show stream ID %d trb ring, supported [1 - %d]\n", 509 epriv->stream_id, epriv->stream_info->num_streams - 1); 510 511 return 0; 512 } 513 514 static int xhci_stream_id_open(struct inode *inode, struct file *file) 515 { 516 return single_open(file, xhci_stream_id_show, inode->i_private); 517 } 518 519 static ssize_t xhci_stream_id_write(struct file *file, const char __user *ubuf, 520 size_t count, loff_t *ppos) 521 { 522 struct seq_file *s = file->private_data; 523 struct xhci_ep_priv *epriv = s->private; 524 int ret; 525 u16 stream_id; /* MaxPStreams + 1 <= 16 */ 526 527 if (!epriv->stream_info) 528 return -EPERM; 529 530 /* Decimal number */ 531 ret = kstrtou16_from_user(ubuf, count, 10, &stream_id); 532 if (ret) 533 return ret; 534 535 if (stream_id == 0 || stream_id >= epriv->stream_info->num_streams) 536 return -EINVAL; 537 538 epriv->stream_id = stream_id; 539 epriv->show_ring = epriv->stream_info->stream_rings[stream_id]; 540 541 return count; 542 } 543 544 static const struct file_operations stream_id_fops = { 545 .open = xhci_stream_id_open, 546 .write = xhci_stream_id_write, 547 .read = seq_read, 548 .llseek = seq_lseek, 549 .release = single_release, 550 }; 551 552 static int xhci_stream_context_array_show(struct seq_file *s, void *unused) 553 { 554 struct xhci_ep_priv *epriv = s->private; 555 struct xhci_stream_ctx *stream_ctx; 556 dma_addr_t dma; 557 int id; 558 559 if (!epriv->stream_info) 560 return -EPERM; 561 562 seq_printf(s, "Allocated %d streams and %d stream context array entries\n", 563 epriv->stream_info->num_streams, 564 epriv->stream_info->num_stream_ctxs); 565 566 for (id = 0; id < epriv->stream_info->num_stream_ctxs; id++) { 567 stream_ctx = epriv->stream_info->stream_ctx_array + id; 568 dma = epriv->stream_info->ctx_array_dma + id * 16; 569 if (id < epriv->stream_info->num_streams) 570 seq_printf(s, "%pad stream id %d deq %016llx\n", &dma, 571 id, le64_to_cpu(stream_ctx->stream_ring)); 572 else 573 seq_printf(s, "%pad stream context entry not used deq %016llx\n", 574 &dma, le64_to_cpu(stream_ctx->stream_ring)); 575 } 576 577 return 0; 578 } 579 DEFINE_SHOW_ATTRIBUTE(xhci_stream_context_array); 580 581 void xhci_debugfs_create_stream_files(struct xhci_hcd *xhci, 582 struct xhci_virt_device *dev, 583 int ep_index) 584 { 585 struct xhci_slot_priv *spriv = dev->debugfs_private; 586 struct xhci_ep_priv *epriv; 587 588 if (!spriv || !spriv->eps[ep_index] || 589 !dev->eps[ep_index].stream_info) 590 return; 591 592 epriv = spriv->eps[ep_index]; 593 epriv->stream_info = dev->eps[ep_index].stream_info; 594 595 /* Show trb ring of stream ID 1 by default */ 596 epriv->stream_id = 1; 597 epriv->show_ring = epriv->stream_info->stream_rings[1]; 598 debugfs_create_file("stream_id", 0644, 599 epriv->root, epriv, 600 &stream_id_fops); 601 debugfs_create_file("stream_context_array", 0444, 602 epriv->root, epriv, 603 &xhci_stream_context_array_fops); 604 } 605 606 void xhci_debugfs_create_slot(struct xhci_hcd *xhci, int slot_id) 607 { 608 struct xhci_slot_priv *priv; 609 struct xhci_virt_device *dev = xhci->devs[slot_id]; 610 611 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 612 if (!priv) 613 return; 614 615 snprintf(priv->name, sizeof(priv->name), "%02d", slot_id); 616 priv->root = debugfs_create_dir(priv->name, xhci->debugfs_slots); 617 priv->dev = dev; 618 dev->debugfs_private = priv; 619 620 xhci_debugfs_create_ring_dir(xhci, &dev->eps[0].ring, 621 "ep00", priv->root); 622 623 xhci_debugfs_create_context_files(xhci, priv->root, slot_id); 624 } 625 626 void xhci_debugfs_remove_slot(struct xhci_hcd *xhci, int slot_id) 627 { 628 int i; 629 struct xhci_slot_priv *priv; 630 struct xhci_virt_device *dev = xhci->devs[slot_id]; 631 632 if (!dev || !dev->debugfs_private) 633 return; 634 635 priv = dev->debugfs_private; 636 637 debugfs_remove_recursive(priv->root); 638 639 for (i = 0; i < 31; i++) 640 kfree(priv->eps[i]); 641 642 kfree(priv); 643 dev->debugfs_private = NULL; 644 } 645 646 static void xhci_debugfs_create_ports(struct xhci_hcd *xhci, 647 struct dentry *parent) 648 { 649 char port_name[8]; 650 struct xhci_port *port; 651 struct dentry *dir; 652 653 parent = debugfs_create_dir("ports", parent); 654 655 for (int i = 0; i < xhci->max_ports; i++) { 656 scnprintf(port_name, sizeof(port_name), "port%02d", i + 1); 657 dir = debugfs_create_dir(port_name, parent); 658 port = &xhci->hw_ports[i]; 659 debugfs_create_file("portsc", 0644, dir, port, &port_fops); 660 debugfs_create_file("portli", 0444, dir, port, &portli_fops); 661 } 662 } 663 664 static int xhci_port_bw_show(struct xhci_hcd *xhci, u8 dev_speed, 665 struct seq_file *s) 666 { 667 unsigned int i; 668 int ret; 669 struct xhci_container_ctx *ctx; 670 struct usb_hcd *hcd = xhci_to_hcd(xhci); 671 struct device *dev = hcd->self.controller; 672 673 ret = pm_runtime_get_sync(dev); 674 if (ret < 0) 675 return ret; 676 677 ctx = xhci_alloc_port_bw_ctx(xhci, 0); 678 if (!ctx) { 679 pm_runtime_put_sync(dev); 680 return -ENOMEM; 681 } 682 683 /* get roothub port bandwidth */ 684 ret = xhci_get_port_bandwidth(xhci, ctx, dev_speed); 685 if (ret) 686 goto err_out; 687 688 /* print all roothub ports available bandwidth 689 * refer to xhci rev1_2 protocol 6.2.6 , byte 0 is reserved 690 */ 691 for (i = 1; i <= xhci->max_ports; i++) 692 seq_printf(s, "port[%d] available bw: %d%%.\n", i, 693 ctx->bytes[i]); 694 err_out: 695 pm_runtime_put_sync(dev); 696 xhci_free_port_bw_ctx(xhci, ctx); 697 return ret; 698 } 699 700 static int xhci_ss_bw_show(struct seq_file *s, void *unused) 701 { 702 int ret; 703 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 704 705 ret = xhci_port_bw_show(xhci, USB_SPEED_SUPER, s); 706 return ret; 707 } 708 709 static int xhci_hs_bw_show(struct seq_file *s, void *unused) 710 { 711 int ret; 712 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 713 714 ret = xhci_port_bw_show(xhci, USB_SPEED_HIGH, s); 715 return ret; 716 } 717 718 static int xhci_fs_bw_show(struct seq_file *s, void *unused) 719 { 720 int ret; 721 struct xhci_hcd *xhci = (struct xhci_hcd *)s->private; 722 723 ret = xhci_port_bw_show(xhci, USB_SPEED_FULL, s); 724 return ret; 725 } 726 727 static struct xhci_file_map bw_context_files[] = { 728 {"SS_BW", xhci_ss_bw_show, }, 729 {"HS_BW", xhci_hs_bw_show, }, 730 {"FS_BW", xhci_fs_bw_show, }, 731 }; 732 733 static int bw_context_open(struct inode *inode, struct file *file) 734 { 735 int i; 736 struct xhci_file_map *f_map; 737 const char *file_name = file_dentry(file)->d_iname; 738 739 for (i = 0; i < ARRAY_SIZE(bw_context_files); i++) { 740 f_map = &bw_context_files[i]; 741 742 if (strcmp(f_map->name, file_name) == 0) 743 break; 744 } 745 746 return single_open(file, f_map->show, inode->i_private); 747 } 748 749 static const struct file_operations bw_fops = { 750 .open = bw_context_open, 751 .read = seq_read, 752 .llseek = seq_lseek, 753 .release = single_release, 754 }; 755 756 static void xhci_debugfs_create_bandwidth(struct xhci_hcd *xhci, 757 struct dentry *parent) 758 { 759 parent = debugfs_create_dir("port_bandwidth", parent); 760 761 xhci_debugfs_create_files(xhci, bw_context_files, 762 ARRAY_SIZE(bw_context_files), 763 xhci, 764 parent, &bw_fops); 765 } 766 767 void xhci_debugfs_init(struct xhci_hcd *xhci) 768 { 769 struct device *dev = xhci_to_hcd(xhci)->self.controller; 770 771 xhci->debugfs_root = debugfs_create_dir(dev_name(dev), 772 xhci_debugfs_root); 773 774 INIT_LIST_HEAD(&xhci->regset_list); 775 776 xhci_debugfs_regset(xhci, 777 0, 778 xhci_cap_regs, ARRAY_SIZE(xhci_cap_regs), 779 xhci->debugfs_root, "reg-cap"); 780 781 xhci_debugfs_regset(xhci, 782 HC_LENGTH(readl(&xhci->cap_regs->hc_capbase)), 783 xhci_op_regs, ARRAY_SIZE(xhci_op_regs), 784 xhci->debugfs_root, "reg-op"); 785 786 xhci_debugfs_regset(xhci, 787 readl(&xhci->cap_regs->run_regs_off) & RTSOFF_MASK, 788 xhci_runtime_regs, ARRAY_SIZE(xhci_runtime_regs), 789 xhci->debugfs_root, "reg-runtime"); 790 791 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_LEGACY, 792 xhci_extcap_legsup, 793 ARRAY_SIZE(xhci_extcap_legsup), 794 "reg-ext-legsup"); 795 796 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_PROTOCOL, 797 xhci_extcap_protocol, 798 ARRAY_SIZE(xhci_extcap_protocol), 799 "reg-ext-protocol"); 800 801 xhci_debugfs_extcap_regset(xhci, XHCI_EXT_CAPS_DEBUG, 802 xhci_extcap_dbc, 803 ARRAY_SIZE(xhci_extcap_dbc), 804 "reg-ext-dbc"); 805 806 xhci_debugfs_create_ring_dir(xhci, &xhci->cmd_ring, 807 "command-ring", 808 xhci->debugfs_root); 809 810 xhci_debugfs_create_ring_dir(xhci, &xhci->interrupters[0]->event_ring, 811 "event-ring", 812 xhci->debugfs_root); 813 814 xhci->debugfs_slots = debugfs_create_dir("devices", xhci->debugfs_root); 815 816 xhci_debugfs_create_ports(xhci, xhci->debugfs_root); 817 818 xhci_debugfs_create_bandwidth(xhci, xhci->debugfs_root); 819 } 820 821 void xhci_debugfs_exit(struct xhci_hcd *xhci) 822 { 823 struct xhci_regset *rgs, *tmp; 824 825 debugfs_remove_recursive(xhci->debugfs_root); 826 xhci->debugfs_root = NULL; 827 xhci->debugfs_slots = NULL; 828 829 list_for_each_entry_safe(rgs, tmp, &xhci->regset_list, list) 830 xhci_debugfs_free_regset(rgs); 831 } 832 833 void __init xhci_debugfs_create_root(void) 834 { 835 xhci_debugfs_root = debugfs_create_dir("xhci", usb_debug_root); 836 } 837 838 void __exit xhci_debugfs_remove_root(void) 839 { 840 debugfs_remove_recursive(xhci_debugfs_root); 841 xhci_debugfs_root = NULL; 842 } 843