usb_transfer.c revision 199059
1/* $FreeBSD: head/sys/dev/usb/usb_transfer.c 199059 2009-11-08 20:54:03Z thompsa $ */ 2/*- 3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/stdint.h> 28#include <sys/stddef.h> 29#include <sys/param.h> 30#include <sys/queue.h> 31#include <sys/types.h> 32#include <sys/systm.h> 33#include <sys/kernel.h> 34#include <sys/bus.h> 35#include <sys/linker_set.h> 36#include <sys/module.h> 37#include <sys/lock.h> 38#include <sys/mutex.h> 39#include <sys/condvar.h> 40#include <sys/sysctl.h> 41#include <sys/sx.h> 42#include <sys/unistd.h> 43#include <sys/callout.h> 44#include <sys/malloc.h> 45#include <sys/priv.h> 46 47#include <dev/usb/usb.h> 48#include <dev/usb/usbdi.h> 49#include <dev/usb/usbdi_util.h> 50 51#define USB_DEBUG_VAR usb_debug 52 53#include <dev/usb/usb_core.h> 54#include <dev/usb/usb_busdma.h> 55#include <dev/usb/usb_process.h> 56#include <dev/usb/usb_transfer.h> 57#include <dev/usb/usb_device.h> 58#include <dev/usb/usb_debug.h> 59#include <dev/usb/usb_util.h> 60 61#include <dev/usb/usb_controller.h> 62#include <dev/usb/usb_bus.h> 63 64struct usb_std_packet_size { 65 struct { 66 uint16_t min; /* inclusive */ 67 uint16_t max; /* inclusive */ 68 } range; 69 70 uint16_t fixed[4]; 71}; 72 73static usb_callback_t usb_request_callback; 74 75static const struct usb_config usb_control_ep_cfg[USB_DEFAULT_XFER_MAX] = { 76 77 /* This transfer is used for generic control endpoint transfers */ 78 79 [0] = { 80 .type = UE_CONTROL, 81 .endpoint = 0x00, /* Control endpoint */ 82 .direction = UE_DIR_ANY, 83 .bufsize = USB_EP0_BUFSIZE, /* bytes */ 84 .flags = {.proxy_buffer = 1,}, 85 .callback = &usb_request_callback, 86 .usb_mode = USB_MODE_DUAL, /* both modes */ 87 }, 88 89 /* This transfer is used for generic clear stall only */ 90 91 [1] = { 92 .type = UE_CONTROL, 93 .endpoint = 0x00, /* Control pipe */ 94 .direction = UE_DIR_ANY, 95 .bufsize = sizeof(struct usb_device_request), 96 .callback = &usb_do_clear_stall_callback, 97 .timeout = 1000, /* 1 second */ 98 .interval = 50, /* 50ms */ 99 .usb_mode = USB_MODE_HOST, 100 }, 101}; 102 103/* function prototypes */ 104 105static void usbd_update_max_frame_size(struct usb_xfer *); 106static void usbd_transfer_unsetup_sub(struct usb_xfer_root *, uint8_t); 107static void usbd_control_transfer_init(struct usb_xfer *); 108static int usbd_setup_ctrl_transfer(struct usb_xfer *); 109static void usb_callback_proc(struct usb_proc_msg *); 110static void usbd_callback_ss_done_defer(struct usb_xfer *); 111static void usbd_callback_wrapper(struct usb_xfer_queue *); 112static void usb_dma_delay_done_cb(void *); 113static void usbd_transfer_start_cb(void *); 114static uint8_t usbd_callback_wrapper_sub(struct usb_xfer *); 115static void usbd_get_std_packet_size(struct usb_std_packet_size *ptr, 116 uint8_t type, enum usb_dev_speed speed); 117 118/*------------------------------------------------------------------------* 119 * usb_request_callback 120 *------------------------------------------------------------------------*/ 121static void 122usb_request_callback(struct usb_xfer *xfer, usb_error_t error) 123{ 124 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) 125 usb_handle_request_callback(xfer, error); 126 else 127 usbd_do_request_callback(xfer, error); 128} 129 130/*------------------------------------------------------------------------* 131 * usbd_update_max_frame_size 132 * 133 * This function updates the maximum frame size, hence high speed USB 134 * can transfer multiple consecutive packets. 135 *------------------------------------------------------------------------*/ 136static void 137usbd_update_max_frame_size(struct usb_xfer *xfer) 138{ 139 /* compute maximum frame size */ 140 141 if (xfer->max_packet_count == 2) { 142 xfer->max_frame_size = 2 * xfer->max_packet_size; 143 } else if (xfer->max_packet_count == 3) { 144 xfer->max_frame_size = 3 * xfer->max_packet_size; 145 } else { 146 xfer->max_frame_size = xfer->max_packet_size; 147 } 148} 149 150/*------------------------------------------------------------------------* 151 * usbd_get_dma_delay 152 * 153 * The following function is called when we need to 154 * synchronize with DMA hardware. 155 * 156 * Returns: 157 * 0: no DMA delay required 158 * Else: milliseconds of DMA delay 159 *------------------------------------------------------------------------*/ 160usb_timeout_t 161usbd_get_dma_delay(struct usb_bus *bus) 162{ 163 uint32_t temp = 0; 164 165 if (bus->methods->get_dma_delay) { 166 (bus->methods->get_dma_delay) (bus, &temp); 167 /* 168 * Round up and convert to milliseconds. Note that we use 169 * 1024 milliseconds per second. to save a division. 170 */ 171 temp += 0x3FF; 172 temp /= 0x400; 173 } 174 return (temp); 175} 176 177/*------------------------------------------------------------------------* 178 * usbd_transfer_setup_sub_malloc 179 * 180 * This function will allocate one or more DMA'able memory chunks 181 * according to "size", "align" and "count" arguments. "ppc" is 182 * pointed to a linear array of USB page caches afterwards. 183 * 184 * Returns: 185 * 0: Success 186 * Else: Failure 187 *------------------------------------------------------------------------*/ 188#if USB_HAVE_BUSDMA 189uint8_t 190usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm, 191 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align, 192 usb_size_t count) 193{ 194 struct usb_page_cache *pc; 195 struct usb_page *pg; 196 void *buf; 197 usb_size_t n_dma_pc; 198 usb_size_t n_obj; 199 usb_size_t x; 200 usb_size_t y; 201 usb_size_t r; 202 usb_size_t z; 203 204 USB_ASSERT(align > 1, ("Invalid alignment, 0x%08x!\n", 205 align)); 206 USB_ASSERT(size > 0, ("Invalid size = 0!\n")); 207 208 if (count == 0) { 209 return (0); /* nothing to allocate */ 210 } 211 /* 212 * Make sure that the size is aligned properly. 213 */ 214 size = -((-size) & (-align)); 215 216 /* 217 * Try multi-allocation chunks to reduce the number of DMA 218 * allocations, hence DMA allocations are slow. 219 */ 220 if (size >= PAGE_SIZE) { 221 n_dma_pc = count; 222 n_obj = 1; 223 } else { 224 /* compute number of objects per page */ 225 n_obj = (PAGE_SIZE / size); 226 /* 227 * Compute number of DMA chunks, rounded up 228 * to nearest one: 229 */ 230 n_dma_pc = ((count + n_obj - 1) / n_obj); 231 } 232 233 if (parm->buf == NULL) { 234 /* for the future */ 235 parm->dma_page_ptr += n_dma_pc; 236 parm->dma_page_cache_ptr += n_dma_pc; 237 parm->dma_page_ptr += count; 238 parm->xfer_page_cache_ptr += count; 239 return (0); 240 } 241 for (x = 0; x != n_dma_pc; x++) { 242 /* need to initialize the page cache */ 243 parm->dma_page_cache_ptr[x].tag_parent = 244 &parm->curr_xfer->xroot->dma_parent_tag; 245 } 246 for (x = 0; x != count; x++) { 247 /* need to initialize the page cache */ 248 parm->xfer_page_cache_ptr[x].tag_parent = 249 &parm->curr_xfer->xroot->dma_parent_tag; 250 } 251 252 if (ppc) { 253 *ppc = parm->xfer_page_cache_ptr; 254 } 255 r = count; /* set remainder count */ 256 z = n_obj * size; /* set allocation size */ 257 pc = parm->xfer_page_cache_ptr; 258 pg = parm->dma_page_ptr; 259 260 for (x = 0; x != n_dma_pc; x++) { 261 262 if (r < n_obj) { 263 /* compute last remainder */ 264 z = r * size; 265 n_obj = r; 266 } 267 if (usb_pc_alloc_mem(parm->dma_page_cache_ptr, 268 pg, z, align)) { 269 return (1); /* failure */ 270 } 271 /* Set beginning of current buffer */ 272 buf = parm->dma_page_cache_ptr->buffer; 273 /* Make room for one DMA page cache and one page */ 274 parm->dma_page_cache_ptr++; 275 pg++; 276 277 for (y = 0; (y != n_obj); y++, r--, pc++, pg++) { 278 279 /* Load sub-chunk into DMA */ 280 if (usb_pc_dmamap_create(pc, size)) { 281 return (1); /* failure */ 282 } 283 pc->buffer = USB_ADD_BYTES(buf, y * size); 284 pc->page_start = pg; 285 286 mtx_lock(pc->tag_parent->mtx); 287 if (usb_pc_load_mem(pc, size, 1 /* synchronous */ )) { 288 mtx_unlock(pc->tag_parent->mtx); 289 return (1); /* failure */ 290 } 291 mtx_unlock(pc->tag_parent->mtx); 292 } 293 } 294 295 parm->xfer_page_cache_ptr = pc; 296 parm->dma_page_ptr = pg; 297 return (0); 298} 299#endif 300 301/*------------------------------------------------------------------------* 302 * usbd_transfer_setup_sub - transfer setup subroutine 303 * 304 * This function must be called from the "xfer_setup" callback of the 305 * USB Host or Device controller driver when setting up an USB 306 * transfer. This function will setup correct packet sizes, buffer 307 * sizes, flags and more, that are stored in the "usb_xfer" 308 * structure. 309 *------------------------------------------------------------------------*/ 310void 311usbd_transfer_setup_sub(struct usb_setup_params *parm) 312{ 313 enum { 314 REQ_SIZE = 8, 315 MIN_PKT = 8, 316 }; 317 struct usb_xfer *xfer = parm->curr_xfer; 318 const struct usb_config *setup = parm->curr_setup; 319 struct usb_endpoint_descriptor *edesc; 320 struct usb_std_packet_size std_size; 321 usb_frcount_t n_frlengths; 322 usb_frcount_t n_frbuffers; 323 usb_frcount_t x; 324 uint8_t type; 325 uint8_t zmps; 326 327 /* 328 * Sanity check. The following parameters must be initialized before 329 * calling this function. 330 */ 331 if ((parm->hc_max_packet_size == 0) || 332 (parm->hc_max_packet_count == 0) || 333 (parm->hc_max_frame_size == 0)) { 334 parm->err = USB_ERR_INVAL; 335 goto done; 336 } 337 edesc = xfer->endpoint->edesc; 338 339 type = (edesc->bmAttributes & UE_XFERTYPE); 340 341 xfer->flags = setup->flags; 342 xfer->nframes = setup->frames; 343 xfer->timeout = setup->timeout; 344 xfer->callback = setup->callback; 345 xfer->interval = setup->interval; 346 xfer->endpointno = edesc->bEndpointAddress; 347 xfer->max_packet_size = UGETW(edesc->wMaxPacketSize); 348 xfer->max_packet_count = 1; 349 /* make a shadow copy: */ 350 xfer->flags_int.usb_mode = parm->udev->flags.usb_mode; 351 352 parm->bufsize = setup->bufsize; 353 354 if (parm->speed == USB_SPEED_HIGH) { 355 xfer->max_packet_count += (xfer->max_packet_size >> 11) & 3; 356 xfer->max_packet_size &= 0x7FF; 357 } 358 /* range check "max_packet_count" */ 359 360 if (xfer->max_packet_count > parm->hc_max_packet_count) { 361 xfer->max_packet_count = parm->hc_max_packet_count; 362 } 363 /* filter "wMaxPacketSize" according to HC capabilities */ 364 365 if ((xfer->max_packet_size > parm->hc_max_packet_size) || 366 (xfer->max_packet_size == 0)) { 367 xfer->max_packet_size = parm->hc_max_packet_size; 368 } 369 /* filter "wMaxPacketSize" according to standard sizes */ 370 371 usbd_get_std_packet_size(&std_size, type, parm->speed); 372 373 if (std_size.range.min || std_size.range.max) { 374 375 if (xfer->max_packet_size < std_size.range.min) { 376 xfer->max_packet_size = std_size.range.min; 377 } 378 if (xfer->max_packet_size > std_size.range.max) { 379 xfer->max_packet_size = std_size.range.max; 380 } 381 } else { 382 383 if (xfer->max_packet_size >= std_size.fixed[3]) { 384 xfer->max_packet_size = std_size.fixed[3]; 385 } else if (xfer->max_packet_size >= std_size.fixed[2]) { 386 xfer->max_packet_size = std_size.fixed[2]; 387 } else if (xfer->max_packet_size >= std_size.fixed[1]) { 388 xfer->max_packet_size = std_size.fixed[1]; 389 } else { 390 /* only one possibility left */ 391 xfer->max_packet_size = std_size.fixed[0]; 392 } 393 } 394 395 /* compute "max_frame_size" */ 396 397 usbd_update_max_frame_size(xfer); 398 399 /* check interrupt interval and transfer pre-delay */ 400 401 if (type == UE_ISOCHRONOUS) { 402 403 uint16_t frame_limit; 404 405 xfer->interval = 0; /* not used, must be zero */ 406 xfer->flags_int.isochronous_xfr = 1; /* set flag */ 407 408 if (xfer->timeout == 0) { 409 /* 410 * set a default timeout in 411 * case something goes wrong! 412 */ 413 xfer->timeout = 1000 / 4; 414 } 415 switch (parm->speed) { 416 case USB_SPEED_LOW: 417 case USB_SPEED_FULL: 418 frame_limit = USB_MAX_FS_ISOC_FRAMES_PER_XFER; 419 xfer->fps_shift = 0; 420 break; 421 default: 422 frame_limit = USB_MAX_HS_ISOC_FRAMES_PER_XFER; 423 xfer->fps_shift = edesc->bInterval; 424 if (xfer->fps_shift > 0) 425 xfer->fps_shift--; 426 if (xfer->fps_shift > 3) 427 xfer->fps_shift = 3; 428 break; 429 } 430 431 if (xfer->nframes > frame_limit) { 432 /* 433 * this is not going to work 434 * cross hardware 435 */ 436 parm->err = USB_ERR_INVAL; 437 goto done; 438 } 439 if (xfer->nframes == 0) { 440 /* 441 * this is not a valid value 442 */ 443 parm->err = USB_ERR_ZERO_NFRAMES; 444 goto done; 445 } 446 } else { 447 448 /* 449 * if a value is specified use that else check the endpoint 450 * descriptor 451 */ 452 if (xfer->interval == 0) { 453 454 if (type == UE_INTERRUPT) { 455 456 xfer->interval = edesc->bInterval; 457 458 switch (parm->speed) { 459 case USB_SPEED_SUPER: 460 case USB_SPEED_VARIABLE: 461 /* 125us -> 1ms */ 462 if (xfer->interval < 4) 463 xfer->interval = 1; 464 else if (xfer->interval > 16) 465 xfer->interval = (1<<(16-4)); 466 else 467 xfer->interval = 468 (1 << (xfer->interval-4)); 469 break; 470 case USB_SPEED_HIGH: 471 /* 125us -> 1ms */ 472 xfer->interval /= 8; 473 break; 474 default: 475 break; 476 } 477 if (xfer->interval == 0) { 478 /* 479 * One millisecond is the smallest 480 * interval we support: 481 */ 482 xfer->interval = 1; 483 } 484 } 485 } 486 } 487 488 /* 489 * NOTE: we do not allow "max_packet_size" or "max_frame_size" 490 * to be equal to zero when setting up USB transfers, hence 491 * this leads to alot of extra code in the USB kernel. 492 */ 493 494 if ((xfer->max_frame_size == 0) || 495 (xfer->max_packet_size == 0)) { 496 497 zmps = 1; 498 499 if ((parm->bufsize <= MIN_PKT) && 500 (type != UE_CONTROL) && 501 (type != UE_BULK)) { 502 503 /* workaround */ 504 xfer->max_packet_size = MIN_PKT; 505 xfer->max_packet_count = 1; 506 parm->bufsize = 0; /* automatic setup length */ 507 usbd_update_max_frame_size(xfer); 508 509 } else { 510 parm->err = USB_ERR_ZERO_MAXP; 511 goto done; 512 } 513 514 } else { 515 zmps = 0; 516 } 517 518 /* 519 * check if we should setup a default 520 * length: 521 */ 522 523 if (parm->bufsize == 0) { 524 525 parm->bufsize = xfer->max_frame_size; 526 527 if (type == UE_ISOCHRONOUS) { 528 parm->bufsize *= xfer->nframes; 529 } 530 } 531 /* 532 * check if we are about to setup a proxy 533 * type of buffer: 534 */ 535 536 if (xfer->flags.proxy_buffer) { 537 538 /* round bufsize up */ 539 540 parm->bufsize += (xfer->max_frame_size - 1); 541 542 if (parm->bufsize < xfer->max_frame_size) { 543 /* length wrapped around */ 544 parm->err = USB_ERR_INVAL; 545 goto done; 546 } 547 /* subtract remainder */ 548 549 parm->bufsize -= (parm->bufsize % xfer->max_frame_size); 550 551 /* add length of USB device request structure, if any */ 552 553 if (type == UE_CONTROL) { 554 parm->bufsize += REQ_SIZE; /* SETUP message */ 555 } 556 } 557 xfer->max_data_length = parm->bufsize; 558 559 /* Setup "n_frlengths" and "n_frbuffers" */ 560 561 if (type == UE_ISOCHRONOUS) { 562 n_frlengths = xfer->nframes; 563 n_frbuffers = 1; 564 } else { 565 566 if (type == UE_CONTROL) { 567 xfer->flags_int.control_xfr = 1; 568 if (xfer->nframes == 0) { 569 if (parm->bufsize <= REQ_SIZE) { 570 /* 571 * there will never be any data 572 * stage 573 */ 574 xfer->nframes = 1; 575 } else { 576 xfer->nframes = 2; 577 } 578 } 579 } else { 580 if (xfer->nframes == 0) { 581 xfer->nframes = 1; 582 } 583 } 584 585 n_frlengths = xfer->nframes; 586 n_frbuffers = xfer->nframes; 587 } 588 589 /* 590 * check if we have room for the 591 * USB device request structure: 592 */ 593 594 if (type == UE_CONTROL) { 595 596 if (xfer->max_data_length < REQ_SIZE) { 597 /* length wrapped around or too small bufsize */ 598 parm->err = USB_ERR_INVAL; 599 goto done; 600 } 601 xfer->max_data_length -= REQ_SIZE; 602 } 603 /* setup "frlengths" */ 604 xfer->frlengths = parm->xfer_length_ptr; 605 parm->xfer_length_ptr += n_frlengths; 606 607 /* setup "frbuffers" */ 608 xfer->frbuffers = parm->xfer_page_cache_ptr; 609 parm->xfer_page_cache_ptr += n_frbuffers; 610 611 /* initialize max frame count */ 612 xfer->max_frame_count = xfer->nframes; 613 614 /* 615 * check if we need to setup 616 * a local buffer: 617 */ 618 619 if (!xfer->flags.ext_buffer) { 620 621 /* align data */ 622 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1)); 623 624 if (parm->buf) { 625 626 xfer->local_buffer = 627 USB_ADD_BYTES(parm->buf, parm->size[0]); 628 629 usbd_xfer_set_frame_offset(xfer, 0, 0); 630 631 if ((type == UE_CONTROL) && (n_frbuffers > 1)) { 632 usbd_xfer_set_frame_offset(xfer, REQ_SIZE, 1); 633 } 634 } 635 parm->size[0] += parm->bufsize; 636 637 /* align data again */ 638 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1)); 639 } 640 /* 641 * Compute maximum buffer size 642 */ 643 644 if (parm->bufsize_max < parm->bufsize) { 645 parm->bufsize_max = parm->bufsize; 646 } 647#if USB_HAVE_BUSDMA 648 if (xfer->flags_int.bdma_enable) { 649 /* 650 * Setup "dma_page_ptr". 651 * 652 * Proof for formula below: 653 * 654 * Assume there are three USB frames having length "a", "b" and 655 * "c". These USB frames will at maximum need "z" 656 * "usb_page" structures. "z" is given by: 657 * 658 * z = ((a / USB_PAGE_SIZE) + 2) + ((b / USB_PAGE_SIZE) + 2) + 659 * ((c / USB_PAGE_SIZE) + 2); 660 * 661 * Constraining "a", "b" and "c" like this: 662 * 663 * (a + b + c) <= parm->bufsize 664 * 665 * We know that: 666 * 667 * z <= ((parm->bufsize / USB_PAGE_SIZE) + (3*2)); 668 * 669 * Here is the general formula: 670 */ 671 xfer->dma_page_ptr = parm->dma_page_ptr; 672 parm->dma_page_ptr += (2 * n_frbuffers); 673 parm->dma_page_ptr += (parm->bufsize / USB_PAGE_SIZE); 674 } 675#endif 676 if (zmps) { 677 /* correct maximum data length */ 678 xfer->max_data_length = 0; 679 } 680 /* subtract USB frame remainder from "hc_max_frame_size" */ 681 682 xfer->max_hc_frame_size = 683 (parm->hc_max_frame_size - 684 (parm->hc_max_frame_size % xfer->max_frame_size)); 685 686 if (xfer->max_hc_frame_size == 0) { 687 parm->err = USB_ERR_INVAL; 688 goto done; 689 } 690 691 /* initialize frame buffers */ 692 693 if (parm->buf) { 694 for (x = 0; x != n_frbuffers; x++) { 695 xfer->frbuffers[x].tag_parent = 696 &xfer->xroot->dma_parent_tag; 697#if USB_HAVE_BUSDMA 698 if (xfer->flags_int.bdma_enable && 699 (parm->bufsize_max > 0)) { 700 701 if (usb_pc_dmamap_create( 702 xfer->frbuffers + x, 703 parm->bufsize_max)) { 704 parm->err = USB_ERR_NOMEM; 705 goto done; 706 } 707 } 708#endif 709 } 710 } 711done: 712 if (parm->err) { 713 /* 714 * Set some dummy values so that we avoid division by zero: 715 */ 716 xfer->max_hc_frame_size = 1; 717 xfer->max_frame_size = 1; 718 xfer->max_packet_size = 1; 719 xfer->max_data_length = 0; 720 xfer->nframes = 0; 721 xfer->max_frame_count = 0; 722 } 723} 724 725/*------------------------------------------------------------------------* 726 * usbd_transfer_setup - setup an array of USB transfers 727 * 728 * NOTE: You must always call "usbd_transfer_unsetup" after calling 729 * "usbd_transfer_setup" if success was returned. 730 * 731 * The idea is that the USB device driver should pre-allocate all its 732 * transfers by one call to this function. 733 * 734 * Return values: 735 * 0: Success 736 * Else: Failure 737 *------------------------------------------------------------------------*/ 738usb_error_t 739usbd_transfer_setup(struct usb_device *udev, 740 const uint8_t *ifaces, struct usb_xfer **ppxfer, 741 const struct usb_config *setup_start, uint16_t n_setup, 742 void *priv_sc, struct mtx *xfer_mtx) 743{ 744 struct usb_xfer dummy; 745 struct usb_setup_params parm; 746 const struct usb_config *setup_end = setup_start + n_setup; 747 const struct usb_config *setup; 748 struct usb_endpoint *ep; 749 struct usb_xfer_root *info; 750 struct usb_xfer *xfer; 751 void *buf = NULL; 752 uint16_t n; 753 uint16_t refcount; 754 755 parm.err = 0; 756 refcount = 0; 757 info = NULL; 758 759 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 760 "usbd_transfer_setup can sleep!"); 761 762 /* do some checking first */ 763 764 if (n_setup == 0) { 765 DPRINTFN(6, "setup array has zero length!\n"); 766 return (USB_ERR_INVAL); 767 } 768 if (ifaces == 0) { 769 DPRINTFN(6, "ifaces array is NULL!\n"); 770 return (USB_ERR_INVAL); 771 } 772 if (xfer_mtx == NULL) { 773 DPRINTFN(6, "using global lock\n"); 774 xfer_mtx = &Giant; 775 } 776 /* sanity checks */ 777 for (setup = setup_start, n = 0; 778 setup != setup_end; setup++, n++) { 779 if (setup->bufsize == (usb_frlength_t)-1) { 780 parm.err = USB_ERR_BAD_BUFSIZE; 781 DPRINTF("invalid bufsize\n"); 782 } 783 if (setup->callback == NULL) { 784 parm.err = USB_ERR_NO_CALLBACK; 785 DPRINTF("no callback\n"); 786 } 787 ppxfer[n] = NULL; 788 } 789 790 if (parm.err) { 791 goto done; 792 } 793 bzero(&parm, sizeof(parm)); 794 795 parm.udev = udev; 796 parm.speed = usbd_get_speed(udev); 797 parm.hc_max_packet_count = 1; 798 799 if (parm.speed >= USB_SPEED_MAX) { 800 parm.err = USB_ERR_INVAL; 801 goto done; 802 } 803 /* setup all transfers */ 804 805 while (1) { 806 807 if (buf) { 808 /* 809 * Initialize the "usb_xfer_root" structure, 810 * which is common for all our USB transfers. 811 */ 812 info = USB_ADD_BYTES(buf, 0); 813 814 info->memory_base = buf; 815 info->memory_size = parm.size[0]; 816 817#if USB_HAVE_BUSDMA 818 info->dma_page_cache_start = USB_ADD_BYTES(buf, parm.size[4]); 819 info->dma_page_cache_end = USB_ADD_BYTES(buf, parm.size[5]); 820#endif 821 info->xfer_page_cache_start = USB_ADD_BYTES(buf, parm.size[5]); 822 info->xfer_page_cache_end = USB_ADD_BYTES(buf, parm.size[2]); 823 824 cv_init(&info->cv_drain, "WDRAIN"); 825 826 info->xfer_mtx = xfer_mtx; 827#if USB_HAVE_BUSDMA 828 usb_dma_tag_setup(&info->dma_parent_tag, 829 parm.dma_tag_p, udev->bus->dma_parent_tag[0].tag, 830 xfer_mtx, &usb_bdma_done_event, 32, parm.dma_tag_max); 831#endif 832 833 info->bus = udev->bus; 834 info->udev = udev; 835 836 TAILQ_INIT(&info->done_q.head); 837 info->done_q.command = &usbd_callback_wrapper; 838#if USB_HAVE_BUSDMA 839 TAILQ_INIT(&info->dma_q.head); 840 info->dma_q.command = &usb_bdma_work_loop; 841#endif 842 info->done_m[0].hdr.pm_callback = &usb_callback_proc; 843 info->done_m[0].xroot = info; 844 info->done_m[1].hdr.pm_callback = &usb_callback_proc; 845 info->done_m[1].xroot = info; 846 847 /* 848 * In device side mode control endpoint 849 * requests need to run from a separate 850 * context, else there is a chance of 851 * deadlock! 852 */ 853 if (setup_start == usb_control_ep_cfg) 854 info->done_p = 855 &udev->bus->control_xfer_proc; 856 else if (xfer_mtx == &Giant) 857 info->done_p = 858 &udev->bus->giant_callback_proc; 859 else 860 info->done_p = 861 &udev->bus->non_giant_callback_proc; 862 } 863 /* reset sizes */ 864 865 parm.size[0] = 0; 866 parm.buf = buf; 867 parm.size[0] += sizeof(info[0]); 868 869 for (setup = setup_start, n = 0; 870 setup != setup_end; setup++, n++) { 871 872 /* skip USB transfers without callbacks: */ 873 if (setup->callback == NULL) { 874 continue; 875 } 876 /* see if there is a matching endpoint */ 877 ep = usbd_get_endpoint(udev, 878 ifaces[setup->if_index], setup); 879 880 if ((ep == NULL) || (ep->methods == NULL)) { 881 if (setup->flags.no_pipe_ok) 882 continue; 883 if ((setup->usb_mode != USB_MODE_DUAL) && 884 (setup->usb_mode != udev->flags.usb_mode)) 885 continue; 886 parm.err = USB_ERR_NO_PIPE; 887 goto done; 888 } 889 890 /* align data properly */ 891 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 892 893 /* store current setup pointer */ 894 parm.curr_setup = setup; 895 896 if (buf) { 897 /* 898 * Common initialization of the 899 * "usb_xfer" structure. 900 */ 901 xfer = USB_ADD_BYTES(buf, parm.size[0]); 902 xfer->address = udev->address; 903 xfer->priv_sc = priv_sc; 904 xfer->xroot = info; 905 906 usb_callout_init_mtx(&xfer->timeout_handle, 907 &udev->bus->bus_mtx, 0); 908 } else { 909 /* 910 * Setup a dummy xfer, hence we are 911 * writing to the "usb_xfer" 912 * structure pointed to by "xfer" 913 * before we have allocated any 914 * memory: 915 */ 916 xfer = &dummy; 917 bzero(&dummy, sizeof(dummy)); 918 refcount++; 919 } 920 921 /* set transfer endpoint pointer */ 922 xfer->endpoint = ep; 923 924 parm.size[0] += sizeof(xfer[0]); 925 parm.methods = xfer->endpoint->methods; 926 parm.curr_xfer = xfer; 927 928 /* 929 * Call the Host or Device controller transfer 930 * setup routine: 931 */ 932 (udev->bus->methods->xfer_setup) (&parm); 933 934 /* check for error */ 935 if (parm.err) 936 goto done; 937 938 if (buf) { 939 /* 940 * Increment the endpoint refcount. This 941 * basically prevents setting a new 942 * configuration and alternate setting 943 * when USB transfers are in use on 944 * the given interface. Search the USB 945 * code for "endpoint->refcount" if you 946 * want more information. 947 */ 948 xfer->endpoint->refcount++; 949 950 /* 951 * Whenever we set ppxfer[] then we 952 * also need to increment the 953 * "setup_refcount": 954 */ 955 info->setup_refcount++; 956 957 /* 958 * Transfer is successfully setup and 959 * can be used: 960 */ 961 ppxfer[n] = xfer; 962 } 963 } 964 965 if (buf || parm.err) { 966 goto done; 967 } 968 if (refcount == 0) { 969 /* no transfers - nothing to do ! */ 970 goto done; 971 } 972 /* align data properly */ 973 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 974 975 /* store offset temporarily */ 976 parm.size[1] = parm.size[0]; 977 978 /* 979 * The number of DMA tags required depends on 980 * the number of endpoints. The current estimate 981 * for maximum number of DMA tags per endpoint 982 * is two. 983 */ 984 parm.dma_tag_max += 2 * MIN(n_setup, USB_EP_MAX); 985 986 /* 987 * DMA tags for QH, TD, Data and more. 988 */ 989 parm.dma_tag_max += 8; 990 991 parm.dma_tag_p += parm.dma_tag_max; 992 993 parm.size[0] += ((uint8_t *)parm.dma_tag_p) - 994 ((uint8_t *)0); 995 996 /* align data properly */ 997 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 998 999 /* store offset temporarily */ 1000 parm.size[3] = parm.size[0]; 1001 1002 parm.size[0] += ((uint8_t *)parm.dma_page_ptr) - 1003 ((uint8_t *)0); 1004 1005 /* align data properly */ 1006 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 1007 1008 /* store offset temporarily */ 1009 parm.size[4] = parm.size[0]; 1010 1011 parm.size[0] += ((uint8_t *)parm.dma_page_cache_ptr) - 1012 ((uint8_t *)0); 1013 1014 /* store end offset temporarily */ 1015 parm.size[5] = parm.size[0]; 1016 1017 parm.size[0] += ((uint8_t *)parm.xfer_page_cache_ptr) - 1018 ((uint8_t *)0); 1019 1020 /* store end offset temporarily */ 1021 1022 parm.size[2] = parm.size[0]; 1023 1024 /* align data properly */ 1025 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 1026 1027 parm.size[6] = parm.size[0]; 1028 1029 parm.size[0] += ((uint8_t *)parm.xfer_length_ptr) - 1030 ((uint8_t *)0); 1031 1032 /* align data properly */ 1033 parm.size[0] += ((-parm.size[0]) & (USB_HOST_ALIGN - 1)); 1034 1035 /* allocate zeroed memory */ 1036 buf = malloc(parm.size[0], M_USB, M_WAITOK | M_ZERO); 1037 1038 if (buf == NULL) { 1039 parm.err = USB_ERR_NOMEM; 1040 DPRINTFN(0, "cannot allocate memory block for " 1041 "configuration (%d bytes)\n", 1042 parm.size[0]); 1043 goto done; 1044 } 1045 parm.dma_tag_p = USB_ADD_BYTES(buf, parm.size[1]); 1046 parm.dma_page_ptr = USB_ADD_BYTES(buf, parm.size[3]); 1047 parm.dma_page_cache_ptr = USB_ADD_BYTES(buf, parm.size[4]); 1048 parm.xfer_page_cache_ptr = USB_ADD_BYTES(buf, parm.size[5]); 1049 parm.xfer_length_ptr = USB_ADD_BYTES(buf, parm.size[6]); 1050 } 1051 1052done: 1053 if (buf) { 1054 if (info->setup_refcount == 0) { 1055 /* 1056 * "usbd_transfer_unsetup_sub" will unlock 1057 * the bus mutex before returning ! 1058 */ 1059 USB_BUS_LOCK(info->bus); 1060 1061 /* something went wrong */ 1062 usbd_transfer_unsetup_sub(info, 0); 1063 } 1064 } 1065 if (parm.err) { 1066 usbd_transfer_unsetup(ppxfer, n_setup); 1067 } 1068 return (parm.err); 1069} 1070 1071/*------------------------------------------------------------------------* 1072 * usbd_transfer_unsetup_sub - factored out code 1073 *------------------------------------------------------------------------*/ 1074static void 1075usbd_transfer_unsetup_sub(struct usb_xfer_root *info, uint8_t needs_delay) 1076{ 1077 struct usb_page_cache *pc; 1078 1079 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED); 1080 1081 /* wait for any outstanding DMA operations */ 1082 1083 if (needs_delay) { 1084 usb_timeout_t temp; 1085 temp = usbd_get_dma_delay(info->bus); 1086 usb_pause_mtx(&info->bus->bus_mtx, 1087 USB_MS_TO_TICKS(temp)); 1088 } 1089 1090 /* make sure that our done messages are not queued anywhere */ 1091 usb_proc_mwait(info->done_p, &info->done_m[0], &info->done_m[1]); 1092 1093 USB_BUS_UNLOCK(info->bus); 1094 1095#if USB_HAVE_BUSDMA 1096 /* free DMA'able memory, if any */ 1097 pc = info->dma_page_cache_start; 1098 while (pc != info->dma_page_cache_end) { 1099 usb_pc_free_mem(pc); 1100 pc++; 1101 } 1102 1103 /* free DMA maps in all "xfer->frbuffers" */ 1104 pc = info->xfer_page_cache_start; 1105 while (pc != info->xfer_page_cache_end) { 1106 usb_pc_dmamap_destroy(pc); 1107 pc++; 1108 } 1109 1110 /* free all DMA tags */ 1111 usb_dma_tag_unsetup(&info->dma_parent_tag); 1112#endif 1113 1114 cv_destroy(&info->cv_drain); 1115 1116 /* 1117 * free the "memory_base" last, hence the "info" structure is 1118 * contained within the "memory_base"! 1119 */ 1120 free(info->memory_base, M_USB); 1121} 1122 1123/*------------------------------------------------------------------------* 1124 * usbd_transfer_unsetup - unsetup/free an array of USB transfers 1125 * 1126 * NOTE: All USB transfers in progress will get called back passing 1127 * the error code "USB_ERR_CANCELLED" before this function 1128 * returns. 1129 *------------------------------------------------------------------------*/ 1130void 1131usbd_transfer_unsetup(struct usb_xfer **pxfer, uint16_t n_setup) 1132{ 1133 struct usb_xfer *xfer; 1134 struct usb_xfer_root *info; 1135 uint8_t needs_delay = 0; 1136 1137 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1138 "usbd_transfer_unsetup can sleep!"); 1139 1140 while (n_setup--) { 1141 xfer = pxfer[n_setup]; 1142 1143 if (xfer == NULL) 1144 continue; 1145 1146 info = xfer->xroot; 1147 1148 USB_XFER_LOCK(xfer); 1149 USB_BUS_LOCK(info->bus); 1150 1151 /* 1152 * HINT: when you start/stop a transfer, it might be a 1153 * good idea to directly use the "pxfer[]" structure: 1154 * 1155 * usbd_transfer_start(sc->pxfer[0]); 1156 * usbd_transfer_stop(sc->pxfer[0]); 1157 * 1158 * That way, if your code has many parts that will not 1159 * stop running under the same lock, in other words 1160 * "xfer_mtx", the usbd_transfer_start and 1161 * usbd_transfer_stop functions will simply return 1162 * when they detect a NULL pointer argument. 1163 * 1164 * To avoid any races we clear the "pxfer[]" pointer 1165 * while holding the private mutex of the driver: 1166 */ 1167 pxfer[n_setup] = NULL; 1168 1169 USB_BUS_UNLOCK(info->bus); 1170 USB_XFER_UNLOCK(xfer); 1171 1172 usbd_transfer_drain(xfer); 1173 1174#if USB_HAVE_BUSDMA 1175 if (xfer->flags_int.bdma_enable) 1176 needs_delay = 1; 1177#endif 1178 /* 1179 * NOTE: default endpoint does not have an 1180 * interface, even if endpoint->iface_index == 0 1181 */ 1182 xfer->endpoint->refcount--; 1183 1184 usb_callout_drain(&xfer->timeout_handle); 1185 1186 USB_BUS_LOCK(info->bus); 1187 1188 USB_ASSERT(info->setup_refcount != 0, ("Invalid setup " 1189 "reference count!\n")); 1190 1191 info->setup_refcount--; 1192 1193 if (info->setup_refcount == 0) { 1194 usbd_transfer_unsetup_sub(info, 1195 needs_delay); 1196 } else { 1197 USB_BUS_UNLOCK(info->bus); 1198 } 1199 } 1200} 1201 1202/*------------------------------------------------------------------------* 1203 * usbd_control_transfer_init - factored out code 1204 * 1205 * In USB Device Mode we have to wait for the SETUP packet which 1206 * containst the "struct usb_device_request" structure, before we can 1207 * transfer any data. In USB Host Mode we already have the SETUP 1208 * packet at the moment the USB transfer is started. This leads us to 1209 * having to setup the USB transfer at two different places in 1210 * time. This function just contains factored out control transfer 1211 * initialisation code, so that we don't duplicate the code. 1212 *------------------------------------------------------------------------*/ 1213static void 1214usbd_control_transfer_init(struct usb_xfer *xfer) 1215{ 1216 struct usb_device_request req; 1217 1218 /* copy out the USB request header */ 1219 1220 usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req)); 1221 1222 /* setup remainder */ 1223 1224 xfer->flags_int.control_rem = UGETW(req.wLength); 1225 1226 /* copy direction to endpoint variable */ 1227 1228 xfer->endpointno &= ~(UE_DIR_IN | UE_DIR_OUT); 1229 xfer->endpointno |= 1230 (req.bmRequestType & UT_READ) ? UE_DIR_IN : UE_DIR_OUT; 1231} 1232 1233/*------------------------------------------------------------------------* 1234 * usbd_setup_ctrl_transfer 1235 * 1236 * This function handles initialisation of control transfers. Control 1237 * transfers are special in that regard that they can both transmit 1238 * and receive data. 1239 * 1240 * Return values: 1241 * 0: Success 1242 * Else: Failure 1243 *------------------------------------------------------------------------*/ 1244static int 1245usbd_setup_ctrl_transfer(struct usb_xfer *xfer) 1246{ 1247 usb_frlength_t len; 1248 1249 /* Check for control endpoint stall */ 1250 if (xfer->flags.stall_pipe && xfer->flags_int.control_act) { 1251 /* the control transfer is no longer active */ 1252 xfer->flags_int.control_stall = 1; 1253 xfer->flags_int.control_act = 0; 1254 } else { 1255 /* don't stall control transfer by default */ 1256 xfer->flags_int.control_stall = 0; 1257 } 1258 1259 /* Check for invalid number of frames */ 1260 if (xfer->nframes > 2) { 1261 /* 1262 * If you need to split a control transfer, you 1263 * have to do one part at a time. Only with 1264 * non-control transfers you can do multiple 1265 * parts a time. 1266 */ 1267 DPRINTFN(0, "Too many frames: %u\n", 1268 (unsigned int)xfer->nframes); 1269 goto error; 1270 } 1271 1272 /* 1273 * Check if there is a control 1274 * transfer in progress: 1275 */ 1276 if (xfer->flags_int.control_act) { 1277 1278 if (xfer->flags_int.control_hdr) { 1279 1280 /* clear send header flag */ 1281 1282 xfer->flags_int.control_hdr = 0; 1283 1284 /* setup control transfer */ 1285 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) { 1286 usbd_control_transfer_init(xfer); 1287 } 1288 } 1289 /* get data length */ 1290 1291 len = xfer->sumlen; 1292 1293 } else { 1294 1295 /* the size of the SETUP structure is hardcoded ! */ 1296 1297 if (xfer->frlengths[0] != sizeof(struct usb_device_request)) { 1298 DPRINTFN(0, "Wrong framelength %u != %zu\n", 1299 xfer->frlengths[0], sizeof(struct 1300 usb_device_request)); 1301 goto error; 1302 } 1303 /* check USB mode */ 1304 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) { 1305 1306 /* check number of frames */ 1307 if (xfer->nframes != 1) { 1308 /* 1309 * We need to receive the setup 1310 * message first so that we know the 1311 * data direction! 1312 */ 1313 DPRINTF("Misconfigured transfer\n"); 1314 goto error; 1315 } 1316 /* 1317 * Set a dummy "control_rem" value. This 1318 * variable will be overwritten later by a 1319 * call to "usbd_control_transfer_init()" ! 1320 */ 1321 xfer->flags_int.control_rem = 0xFFFF; 1322 } else { 1323 1324 /* setup "endpoint" and "control_rem" */ 1325 1326 usbd_control_transfer_init(xfer); 1327 } 1328 1329 /* set transfer-header flag */ 1330 1331 xfer->flags_int.control_hdr = 1; 1332 1333 /* get data length */ 1334 1335 len = (xfer->sumlen - sizeof(struct usb_device_request)); 1336 } 1337 1338 /* check if there is a length mismatch */ 1339 1340 if (len > xfer->flags_int.control_rem) { 1341 DPRINTFN(0, "Length (%d) greater than " 1342 "remaining length (%d)!\n", len, 1343 xfer->flags_int.control_rem); 1344 goto error; 1345 } 1346 /* check if we are doing a short transfer */ 1347 1348 if (xfer->flags.force_short_xfer) { 1349 xfer->flags_int.control_rem = 0; 1350 } else { 1351 if ((len != xfer->max_data_length) && 1352 (len != xfer->flags_int.control_rem) && 1353 (xfer->nframes != 1)) { 1354 DPRINTFN(0, "Short control transfer without " 1355 "force_short_xfer set!\n"); 1356 goto error; 1357 } 1358 xfer->flags_int.control_rem -= len; 1359 } 1360 1361 /* the status part is executed when "control_act" is 0 */ 1362 1363 if ((xfer->flags_int.control_rem > 0) || 1364 (xfer->flags.manual_status)) { 1365 /* don't execute the STATUS stage yet */ 1366 xfer->flags_int.control_act = 1; 1367 1368 /* sanity check */ 1369 if ((!xfer->flags_int.control_hdr) && 1370 (xfer->nframes == 1)) { 1371 /* 1372 * This is not a valid operation! 1373 */ 1374 DPRINTFN(0, "Invalid parameter " 1375 "combination\n"); 1376 goto error; 1377 } 1378 } else { 1379 /* time to execute the STATUS stage */ 1380 xfer->flags_int.control_act = 0; 1381 } 1382 return (0); /* success */ 1383 1384error: 1385 return (1); /* failure */ 1386} 1387 1388/*------------------------------------------------------------------------* 1389 * usbd_transfer_submit - start USB hardware for the given transfer 1390 * 1391 * This function should only be called from the USB callback. 1392 *------------------------------------------------------------------------*/ 1393void 1394usbd_transfer_submit(struct usb_xfer *xfer) 1395{ 1396 struct usb_xfer_root *info; 1397 struct usb_bus *bus; 1398 usb_frcount_t x; 1399 1400 info = xfer->xroot; 1401 bus = info->bus; 1402 1403 DPRINTF("xfer=%p, endpoint=%p, nframes=%d, dir=%s\n", 1404 xfer, xfer->endpoint, xfer->nframes, USB_GET_DATA_ISREAD(xfer) ? 1405 "read" : "write"); 1406 1407#if USB_DEBUG 1408 if (USB_DEBUG_VAR > 0) { 1409 USB_BUS_LOCK(bus); 1410 1411 usb_dump_endpoint(xfer->endpoint); 1412 1413 USB_BUS_UNLOCK(bus); 1414 } 1415#endif 1416 1417 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 1418 USB_BUS_LOCK_ASSERT(bus, MA_NOTOWNED); 1419 1420 /* Only open the USB transfer once! */ 1421 if (!xfer->flags_int.open) { 1422 xfer->flags_int.open = 1; 1423 1424 DPRINTF("open\n"); 1425 1426 USB_BUS_LOCK(bus); 1427 (xfer->endpoint->methods->open) (xfer); 1428 USB_BUS_UNLOCK(bus); 1429 } 1430 /* set "transferring" flag */ 1431 xfer->flags_int.transferring = 1; 1432 1433#if USB_HAVE_POWERD 1434 /* increment power reference */ 1435 usbd_transfer_power_ref(xfer, 1); 1436#endif 1437 /* 1438 * Check if the transfer is waiting on a queue, most 1439 * frequently the "done_q": 1440 */ 1441 if (xfer->wait_queue) { 1442 USB_BUS_LOCK(bus); 1443 usbd_transfer_dequeue(xfer); 1444 USB_BUS_UNLOCK(bus); 1445 } 1446 /* clear "did_dma_delay" flag */ 1447 xfer->flags_int.did_dma_delay = 0; 1448 1449 /* clear "did_close" flag */ 1450 xfer->flags_int.did_close = 0; 1451 1452#if USB_HAVE_BUSDMA 1453 /* clear "bdma_setup" flag */ 1454 xfer->flags_int.bdma_setup = 0; 1455#endif 1456 /* by default we cannot cancel any USB transfer immediately */ 1457 xfer->flags_int.can_cancel_immed = 0; 1458 1459 /* clear lengths and frame counts by default */ 1460 xfer->sumlen = 0; 1461 xfer->actlen = 0; 1462 xfer->aframes = 0; 1463 1464 /* clear any previous errors */ 1465 xfer->error = 0; 1466 1467 /* Check if the device is still alive */ 1468 if (info->udev->state < USB_STATE_POWERED) { 1469 USB_BUS_LOCK(bus); 1470 /* 1471 * Must return cancelled error code else 1472 * device drivers can hang. 1473 */ 1474 usbd_transfer_done(xfer, USB_ERR_CANCELLED); 1475 USB_BUS_UNLOCK(bus); 1476 return; 1477 } 1478 1479 /* sanity check */ 1480 if (xfer->nframes == 0) { 1481 if (xfer->flags.stall_pipe) { 1482 /* 1483 * Special case - want to stall without transferring 1484 * any data: 1485 */ 1486 DPRINTF("xfer=%p nframes=0: stall " 1487 "or clear stall!\n", xfer); 1488 USB_BUS_LOCK(bus); 1489 xfer->flags_int.can_cancel_immed = 1; 1490 /* start the transfer */ 1491 usb_command_wrapper(&xfer->endpoint->endpoint_q, xfer); 1492 USB_BUS_UNLOCK(bus); 1493 return; 1494 } 1495 USB_BUS_LOCK(bus); 1496 usbd_transfer_done(xfer, USB_ERR_INVAL); 1497 USB_BUS_UNLOCK(bus); 1498 return; 1499 } 1500 /* compute total transfer length */ 1501 1502 for (x = 0; x != xfer->nframes; x++) { 1503 xfer->sumlen += xfer->frlengths[x]; 1504 if (xfer->sumlen < xfer->frlengths[x]) { 1505 /* length wrapped around */ 1506 USB_BUS_LOCK(bus); 1507 usbd_transfer_done(xfer, USB_ERR_INVAL); 1508 USB_BUS_UNLOCK(bus); 1509 return; 1510 } 1511 } 1512 1513 /* clear some internal flags */ 1514 1515 xfer->flags_int.short_xfer_ok = 0; 1516 xfer->flags_int.short_frames_ok = 0; 1517 1518 /* check if this is a control transfer */ 1519 1520 if (xfer->flags_int.control_xfr) { 1521 1522 if (usbd_setup_ctrl_transfer(xfer)) { 1523 USB_BUS_LOCK(bus); 1524 usbd_transfer_done(xfer, USB_ERR_STALLED); 1525 USB_BUS_UNLOCK(bus); 1526 return; 1527 } 1528 } 1529 /* 1530 * Setup filtered version of some transfer flags, 1531 * in case of data read direction 1532 */ 1533 if (USB_GET_DATA_ISREAD(xfer)) { 1534 1535 if (xfer->flags.short_frames_ok) { 1536 xfer->flags_int.short_xfer_ok = 1; 1537 xfer->flags_int.short_frames_ok = 1; 1538 } else if (xfer->flags.short_xfer_ok) { 1539 xfer->flags_int.short_xfer_ok = 1; 1540 1541 /* check for control transfer */ 1542 if (xfer->flags_int.control_xfr) { 1543 /* 1544 * 1) Control transfers do not support 1545 * reception of multiple short USB 1546 * frames in host mode and device side 1547 * mode, with exception of: 1548 * 1549 * 2) Due to sometimes buggy device 1550 * side firmware we need to do a 1551 * STATUS stage in case of short 1552 * control transfers in USB host mode. 1553 * The STATUS stage then becomes the 1554 * "alt_next" to the DATA stage. 1555 */ 1556 xfer->flags_int.short_frames_ok = 1; 1557 } 1558 } 1559 } 1560 /* 1561 * Check if BUS-DMA support is enabled and try to load virtual 1562 * buffers into DMA, if any: 1563 */ 1564#if USB_HAVE_BUSDMA 1565 if (xfer->flags_int.bdma_enable) { 1566 /* insert the USB transfer last in the BUS-DMA queue */ 1567 usb_command_wrapper(&xfer->xroot->dma_q, xfer); 1568 return; 1569 } 1570#endif 1571 /* 1572 * Enter the USB transfer into the Host Controller or 1573 * Device Controller schedule: 1574 */ 1575 usbd_pipe_enter(xfer); 1576} 1577 1578/*------------------------------------------------------------------------* 1579 * usbd_pipe_enter - factored out code 1580 *------------------------------------------------------------------------*/ 1581void 1582usbd_pipe_enter(struct usb_xfer *xfer) 1583{ 1584 struct usb_endpoint *ep; 1585 1586 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 1587 1588 USB_BUS_LOCK(xfer->xroot->bus); 1589 1590 ep = xfer->endpoint; 1591 1592 DPRINTF("enter\n"); 1593 1594 /* enter the transfer */ 1595 (ep->methods->enter) (xfer); 1596 1597 xfer->flags_int.can_cancel_immed = 1; 1598 1599 /* check for transfer error */ 1600 if (xfer->error) { 1601 /* some error has happened */ 1602 usbd_transfer_done(xfer, 0); 1603 USB_BUS_UNLOCK(xfer->xroot->bus); 1604 return; 1605 } 1606 1607 /* start the transfer */ 1608 usb_command_wrapper(&ep->endpoint_q, xfer); 1609 USB_BUS_UNLOCK(xfer->xroot->bus); 1610} 1611 1612/*------------------------------------------------------------------------* 1613 * usbd_transfer_start - start an USB transfer 1614 * 1615 * NOTE: Calling this function more than one time will only 1616 * result in a single transfer start, until the USB transfer 1617 * completes. 1618 *------------------------------------------------------------------------*/ 1619void 1620usbd_transfer_start(struct usb_xfer *xfer) 1621{ 1622 if (xfer == NULL) { 1623 /* transfer is gone */ 1624 return; 1625 } 1626 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 1627 1628 /* mark the USB transfer started */ 1629 1630 if (!xfer->flags_int.started) { 1631 /* lock the BUS lock to avoid races updating flags_int */ 1632 USB_BUS_LOCK(xfer->xroot->bus); 1633 xfer->flags_int.started = 1; 1634 USB_BUS_UNLOCK(xfer->xroot->bus); 1635 } 1636 /* check if the USB transfer callback is already transferring */ 1637 1638 if (xfer->flags_int.transferring) { 1639 return; 1640 } 1641 USB_BUS_LOCK(xfer->xroot->bus); 1642 /* call the USB transfer callback */ 1643 usbd_callback_ss_done_defer(xfer); 1644 USB_BUS_UNLOCK(xfer->xroot->bus); 1645} 1646 1647/*------------------------------------------------------------------------* 1648 * usbd_transfer_stop - stop an USB transfer 1649 * 1650 * NOTE: Calling this function more than one time will only 1651 * result in a single transfer stop. 1652 * NOTE: When this function returns it is not safe to free nor 1653 * reuse any DMA buffers. See "usbd_transfer_drain()". 1654 *------------------------------------------------------------------------*/ 1655void 1656usbd_transfer_stop(struct usb_xfer *xfer) 1657{ 1658 struct usb_endpoint *ep; 1659 1660 if (xfer == NULL) { 1661 /* transfer is gone */ 1662 return; 1663 } 1664 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 1665 1666 /* check if the USB transfer was ever opened */ 1667 1668 if (!xfer->flags_int.open) { 1669 if (xfer->flags_int.started) { 1670 /* nothing to do except clearing the "started" flag */ 1671 /* lock the BUS lock to avoid races updating flags_int */ 1672 USB_BUS_LOCK(xfer->xroot->bus); 1673 xfer->flags_int.started = 0; 1674 USB_BUS_UNLOCK(xfer->xroot->bus); 1675 } 1676 return; 1677 } 1678 /* try to stop the current USB transfer */ 1679 1680 USB_BUS_LOCK(xfer->xroot->bus); 1681 /* override any previous error */ 1682 xfer->error = USB_ERR_CANCELLED; 1683 1684 /* 1685 * Clear "open" and "started" when both private and USB lock 1686 * is locked so that we don't get a race updating "flags_int" 1687 */ 1688 xfer->flags_int.open = 0; 1689 xfer->flags_int.started = 0; 1690 1691 /* 1692 * Check if we can cancel the USB transfer immediately. 1693 */ 1694 if (xfer->flags_int.transferring) { 1695 if (xfer->flags_int.can_cancel_immed && 1696 (!xfer->flags_int.did_close)) { 1697 DPRINTF("close\n"); 1698 /* 1699 * The following will lead to an USB_ERR_CANCELLED 1700 * error code being passed to the USB callback. 1701 */ 1702 (xfer->endpoint->methods->close) (xfer); 1703 /* only close once */ 1704 xfer->flags_int.did_close = 1; 1705 } else { 1706 /* need to wait for the next done callback */ 1707 } 1708 } else { 1709 DPRINTF("close\n"); 1710 1711 /* close here and now */ 1712 (xfer->endpoint->methods->close) (xfer); 1713 1714 /* 1715 * Any additional DMA delay is done by 1716 * "usbd_transfer_unsetup()". 1717 */ 1718 1719 /* 1720 * Special case. Check if we need to restart a blocked 1721 * endpoint. 1722 */ 1723 ep = xfer->endpoint; 1724 1725 /* 1726 * If the current USB transfer is completing we need 1727 * to start the next one: 1728 */ 1729 if (ep->endpoint_q.curr == xfer) { 1730 usb_command_wrapper(&ep->endpoint_q, NULL); 1731 } 1732 } 1733 1734 USB_BUS_UNLOCK(xfer->xroot->bus); 1735} 1736 1737/*------------------------------------------------------------------------* 1738 * usbd_transfer_pending 1739 * 1740 * This function will check if an USB transfer is pending which is a 1741 * little bit complicated! 1742 * Return values: 1743 * 0: Not pending 1744 * 1: Pending: The USB transfer will receive a callback in the future. 1745 *------------------------------------------------------------------------*/ 1746uint8_t 1747usbd_transfer_pending(struct usb_xfer *xfer) 1748{ 1749 struct usb_xfer_root *info; 1750 struct usb_xfer_queue *pq; 1751 1752 if (xfer == NULL) { 1753 /* transfer is gone */ 1754 return (0); 1755 } 1756 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 1757 1758 if (xfer->flags_int.transferring) { 1759 /* trivial case */ 1760 return (1); 1761 } 1762 USB_BUS_LOCK(xfer->xroot->bus); 1763 if (xfer->wait_queue) { 1764 /* we are waiting on a queue somewhere */ 1765 USB_BUS_UNLOCK(xfer->xroot->bus); 1766 return (1); 1767 } 1768 info = xfer->xroot; 1769 pq = &info->done_q; 1770 1771 if (pq->curr == xfer) { 1772 /* we are currently scheduled for callback */ 1773 USB_BUS_UNLOCK(xfer->xroot->bus); 1774 return (1); 1775 } 1776 /* we are not pending */ 1777 USB_BUS_UNLOCK(xfer->xroot->bus); 1778 return (0); 1779} 1780 1781/*------------------------------------------------------------------------* 1782 * usbd_transfer_drain 1783 * 1784 * This function will stop the USB transfer and wait for any 1785 * additional BUS-DMA and HW-DMA operations to complete. Buffers that 1786 * are loaded into DMA can safely be freed or reused after that this 1787 * function has returned. 1788 *------------------------------------------------------------------------*/ 1789void 1790usbd_transfer_drain(struct usb_xfer *xfer) 1791{ 1792 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, 1793 "usbd_transfer_drain can sleep!"); 1794 1795 if (xfer == NULL) { 1796 /* transfer is gone */ 1797 return; 1798 } 1799 if (xfer->xroot->xfer_mtx != &Giant) { 1800 USB_XFER_LOCK_ASSERT(xfer, MA_NOTOWNED); 1801 } 1802 USB_XFER_LOCK(xfer); 1803 1804 usbd_transfer_stop(xfer); 1805 1806 while (usbd_transfer_pending(xfer) || 1807 xfer->flags_int.doing_callback) { 1808 1809 /* 1810 * It is allowed that the callback can drop its 1811 * transfer mutex. In that case checking only 1812 * "usbd_transfer_pending()" is not enough to tell if 1813 * the USB transfer is fully drained. We also need to 1814 * check the internal "doing_callback" flag. 1815 */ 1816 xfer->flags_int.draining = 1; 1817 1818 /* 1819 * Wait until the current outstanding USB 1820 * transfer is complete ! 1821 */ 1822 cv_wait(&xfer->xroot->cv_drain, xfer->xroot->xfer_mtx); 1823 } 1824 USB_XFER_UNLOCK(xfer); 1825} 1826 1827struct usb_page_cache * 1828usbd_xfer_get_frame(struct usb_xfer *xfer, usb_frcount_t frindex) 1829{ 1830 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1831 1832 return (&xfer->frbuffers[frindex]); 1833} 1834 1835/*------------------------------------------------------------------------* 1836 * usbd_xfer_get_fps_shift 1837 * 1838 * The following function is only useful for isochronous transfers. It 1839 * returns how many times the frame execution rate has been shifted 1840 * down. 1841 * 1842 * Return value: 1843 * Success: 0..3 1844 * Failure: 0 1845 *------------------------------------------------------------------------*/ 1846uint8_t 1847usbd_xfer_get_fps_shift(struct usb_xfer *xfer) 1848{ 1849 return (xfer->fps_shift); 1850} 1851 1852usb_frlength_t 1853usbd_xfer_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex) 1854{ 1855 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1856 1857 return (xfer->frlengths[frindex]); 1858} 1859 1860/*------------------------------------------------------------------------* 1861 * usbd_xfer_set_frame_data 1862 * 1863 * This function sets the pointer of the buffer that should 1864 * loaded directly into DMA for the given USB frame. Passing "ptr" 1865 * equal to NULL while the corresponding "frlength" is greater 1866 * than zero gives undefined results! 1867 *------------------------------------------------------------------------*/ 1868void 1869usbd_xfer_set_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex, 1870 void *ptr, usb_frlength_t len) 1871{ 1872 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1873 1874 /* set virtual address to load and length */ 1875 xfer->frbuffers[frindex].buffer = ptr; 1876 usbd_xfer_set_frame_len(xfer, frindex, len); 1877} 1878 1879void 1880usbd_xfer_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex, 1881 void **ptr, int *len) 1882{ 1883 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1884 1885 if (ptr != NULL) 1886 *ptr = xfer->frbuffers[frindex].buffer; 1887 if (len != NULL) 1888 *len = xfer->frlengths[frindex]; 1889} 1890 1891void 1892usbd_xfer_status(struct usb_xfer *xfer, int *actlen, int *sumlen, int *aframes, 1893 int *nframes) 1894{ 1895 if (actlen != NULL) 1896 *actlen = xfer->actlen; 1897 if (sumlen != NULL) 1898 *sumlen = xfer->sumlen; 1899 if (aframes != NULL) 1900 *aframes = xfer->aframes; 1901 if (nframes != NULL) 1902 *nframes = xfer->nframes; 1903} 1904 1905/*------------------------------------------------------------------------* 1906 * usbd_xfer_set_frame_offset 1907 * 1908 * This function sets the frame data buffer offset relative to the beginning 1909 * of the USB DMA buffer allocated for this USB transfer. 1910 *------------------------------------------------------------------------*/ 1911void 1912usbd_xfer_set_frame_offset(struct usb_xfer *xfer, usb_frlength_t offset, 1913 usb_frcount_t frindex) 1914{ 1915 KASSERT(!xfer->flags.ext_buffer, ("Cannot offset data frame " 1916 "when the USB buffer is external!\n")); 1917 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1918 1919 /* set virtual address to load */ 1920 xfer->frbuffers[frindex].buffer = 1921 USB_ADD_BYTES(xfer->local_buffer, offset); 1922} 1923 1924void 1925usbd_xfer_set_interval(struct usb_xfer *xfer, int i) 1926{ 1927 xfer->interval = i; 1928} 1929 1930void 1931usbd_xfer_set_timeout(struct usb_xfer *xfer, int t) 1932{ 1933 xfer->timeout = t; 1934} 1935 1936void 1937usbd_xfer_set_frames(struct usb_xfer *xfer, usb_frcount_t n) 1938{ 1939 xfer->nframes = n; 1940} 1941 1942usb_frcount_t 1943usbd_xfer_max_frames(struct usb_xfer *xfer) 1944{ 1945 return (xfer->max_frame_count); 1946} 1947 1948usb_frlength_t 1949usbd_xfer_max_len(struct usb_xfer *xfer) 1950{ 1951 return (xfer->max_data_length); 1952} 1953 1954usb_frlength_t 1955usbd_xfer_max_framelen(struct usb_xfer *xfer) 1956{ 1957 return (xfer->max_frame_size); 1958} 1959 1960void 1961usbd_xfer_set_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex, 1962 usb_frlength_t len) 1963{ 1964 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow")); 1965 1966 xfer->frlengths[frindex] = len; 1967} 1968 1969/*------------------------------------------------------------------------* 1970 * usb_callback_proc - factored out code 1971 * 1972 * This function performs USB callbacks. 1973 *------------------------------------------------------------------------*/ 1974static void 1975usb_callback_proc(struct usb_proc_msg *_pm) 1976{ 1977 struct usb_done_msg *pm = (void *)_pm; 1978 struct usb_xfer_root *info = pm->xroot; 1979 1980 /* Change locking order */ 1981 USB_BUS_UNLOCK(info->bus); 1982 1983 /* 1984 * We exploit the fact that the mutex is the same for all 1985 * callbacks that will be called from this thread: 1986 */ 1987 mtx_lock(info->xfer_mtx); 1988 USB_BUS_LOCK(info->bus); 1989 1990 /* Continue where we lost track */ 1991 usb_command_wrapper(&info->done_q, 1992 info->done_q.curr); 1993 1994 mtx_unlock(info->xfer_mtx); 1995} 1996 1997/*------------------------------------------------------------------------* 1998 * usbd_callback_ss_done_defer 1999 * 2000 * This function will defer the start, stop and done callback to the 2001 * correct thread. 2002 *------------------------------------------------------------------------*/ 2003static void 2004usbd_callback_ss_done_defer(struct usb_xfer *xfer) 2005{ 2006 struct usb_xfer_root *info = xfer->xroot; 2007 struct usb_xfer_queue *pq = &info->done_q; 2008 2009 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2010 2011 if (pq->curr != xfer) { 2012 usbd_transfer_enqueue(pq, xfer); 2013 } 2014 if (!pq->recurse_1) { 2015 2016 /* 2017 * We have to postpone the callback due to the fact we 2018 * will have a Lock Order Reversal, LOR, if we try to 2019 * proceed ! 2020 */ 2021 if (usb_proc_msignal(info->done_p, 2022 &info->done_m[0], &info->done_m[1])) { 2023 /* ignore */ 2024 } 2025 } else { 2026 /* clear second recurse flag */ 2027 pq->recurse_2 = 0; 2028 } 2029 return; 2030 2031} 2032 2033/*------------------------------------------------------------------------* 2034 * usbd_callback_wrapper 2035 * 2036 * This is a wrapper for USB callbacks. This wrapper does some 2037 * auto-magic things like figuring out if we can call the callback 2038 * directly from the current context or if we need to wakeup the 2039 * interrupt process. 2040 *------------------------------------------------------------------------*/ 2041static void 2042usbd_callback_wrapper(struct usb_xfer_queue *pq) 2043{ 2044 struct usb_xfer *xfer = pq->curr; 2045 struct usb_xfer_root *info = xfer->xroot; 2046 2047 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED); 2048 if (!mtx_owned(info->xfer_mtx)) { 2049 /* 2050 * Cases that end up here: 2051 * 2052 * 5) HW interrupt done callback or other source. 2053 */ 2054 DPRINTFN(3, "case 5\n"); 2055 2056 /* 2057 * We have to postpone the callback due to the fact we 2058 * will have a Lock Order Reversal, LOR, if we try to 2059 * proceed ! 2060 */ 2061 if (usb_proc_msignal(info->done_p, 2062 &info->done_m[0], &info->done_m[1])) { 2063 /* ignore */ 2064 } 2065 return; 2066 } 2067 /* 2068 * Cases that end up here: 2069 * 2070 * 1) We are starting a transfer 2071 * 2) We are prematurely calling back a transfer 2072 * 3) We are stopping a transfer 2073 * 4) We are doing an ordinary callback 2074 */ 2075 DPRINTFN(3, "case 1-4\n"); 2076 /* get next USB transfer in the queue */ 2077 info->done_q.curr = NULL; 2078 2079 /* set flag in case of drain */ 2080 xfer->flags_int.doing_callback = 1; 2081 2082 USB_BUS_UNLOCK(info->bus); 2083 USB_BUS_LOCK_ASSERT(info->bus, MA_NOTOWNED); 2084 2085 /* set correct USB state for callback */ 2086 if (!xfer->flags_int.transferring) { 2087 xfer->usb_state = USB_ST_SETUP; 2088 if (!xfer->flags_int.started) { 2089 /* we got stopped before we even got started */ 2090 USB_BUS_LOCK(info->bus); 2091 goto done; 2092 } 2093 } else { 2094 2095 if (usbd_callback_wrapper_sub(xfer)) { 2096 /* the callback has been deferred */ 2097 USB_BUS_LOCK(info->bus); 2098 goto done; 2099 } 2100#if USB_HAVE_POWERD 2101 /* decrement power reference */ 2102 usbd_transfer_power_ref(xfer, -1); 2103#endif 2104 xfer->flags_int.transferring = 0; 2105 2106 if (xfer->error) { 2107 xfer->usb_state = USB_ST_ERROR; 2108 } else { 2109 /* set transferred state */ 2110 xfer->usb_state = USB_ST_TRANSFERRED; 2111#if USB_HAVE_BUSDMA 2112 /* sync DMA memory, if any */ 2113 if (xfer->flags_int.bdma_enable && 2114 (!xfer->flags_int.bdma_no_post_sync)) { 2115 usb_bdma_post_sync(xfer); 2116 } 2117#endif 2118 } 2119 } 2120 2121 /* call processing routine */ 2122 (xfer->callback) (xfer, xfer->error); 2123 2124 /* pickup the USB mutex again */ 2125 USB_BUS_LOCK(info->bus); 2126 2127 /* 2128 * Check if we got started after that we got cancelled, but 2129 * before we managed to do the callback. 2130 */ 2131 if ((!xfer->flags_int.open) && 2132 (xfer->flags_int.started) && 2133 (xfer->usb_state == USB_ST_ERROR)) { 2134 /* clear flag in case of drain */ 2135 xfer->flags_int.doing_callback = 0; 2136 /* try to loop, but not recursivly */ 2137 usb_command_wrapper(&info->done_q, xfer); 2138 return; 2139 } 2140 2141done: 2142 /* clear flag in case of drain */ 2143 xfer->flags_int.doing_callback = 0; 2144 2145 /* 2146 * Check if we are draining. 2147 */ 2148 if (xfer->flags_int.draining && 2149 (!xfer->flags_int.transferring)) { 2150 /* "usbd_transfer_drain()" is waiting for end of transfer */ 2151 xfer->flags_int.draining = 0; 2152 cv_broadcast(&info->cv_drain); 2153 } 2154 2155 /* do the next callback, if any */ 2156 usb_command_wrapper(&info->done_q, 2157 info->done_q.curr); 2158} 2159 2160/*------------------------------------------------------------------------* 2161 * usb_dma_delay_done_cb 2162 * 2163 * This function is called when the DMA delay has been exectuded, and 2164 * will make sure that the callback is called to complete the USB 2165 * transfer. This code path is ususally only used when there is an USB 2166 * error like USB_ERR_CANCELLED. 2167 *------------------------------------------------------------------------*/ 2168static void 2169usb_dma_delay_done_cb(void *arg) 2170{ 2171 struct usb_xfer *xfer = arg; 2172 2173 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2174 2175 DPRINTFN(3, "Completed %p\n", xfer); 2176 2177 /* queue callback for execution, again */ 2178 usbd_transfer_done(xfer, 0); 2179} 2180 2181/*------------------------------------------------------------------------* 2182 * usbd_transfer_dequeue 2183 * 2184 * - This function is used to remove an USB transfer from a USB 2185 * transfer queue. 2186 * 2187 * - This function can be called multiple times in a row. 2188 *------------------------------------------------------------------------*/ 2189void 2190usbd_transfer_dequeue(struct usb_xfer *xfer) 2191{ 2192 struct usb_xfer_queue *pq; 2193 2194 pq = xfer->wait_queue; 2195 if (pq) { 2196 TAILQ_REMOVE(&pq->head, xfer, wait_entry); 2197 xfer->wait_queue = NULL; 2198 } 2199} 2200 2201/*------------------------------------------------------------------------* 2202 * usbd_transfer_enqueue 2203 * 2204 * - This function is used to insert an USB transfer into a USB * 2205 * transfer queue. 2206 * 2207 * - This function can be called multiple times in a row. 2208 *------------------------------------------------------------------------*/ 2209void 2210usbd_transfer_enqueue(struct usb_xfer_queue *pq, struct usb_xfer *xfer) 2211{ 2212 /* 2213 * Insert the USB transfer into the queue, if it is not 2214 * already on a USB transfer queue: 2215 */ 2216 if (xfer->wait_queue == NULL) { 2217 xfer->wait_queue = pq; 2218 TAILQ_INSERT_TAIL(&pq->head, xfer, wait_entry); 2219 } 2220} 2221 2222/*------------------------------------------------------------------------* 2223 * usbd_transfer_done 2224 * 2225 * - This function is used to remove an USB transfer from the busdma, 2226 * pipe or interrupt queue. 2227 * 2228 * - This function is used to queue the USB transfer on the done 2229 * queue. 2230 * 2231 * - This function is used to stop any USB transfer timeouts. 2232 *------------------------------------------------------------------------*/ 2233void 2234usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error) 2235{ 2236 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2237 2238 DPRINTF("err=%s\n", usbd_errstr(error)); 2239 2240 /* 2241 * If we are not transferring then just return. 2242 * This can happen during transfer cancel. 2243 */ 2244 if (!xfer->flags_int.transferring) { 2245 DPRINTF("not transferring\n"); 2246 /* end of control transfer, if any */ 2247 xfer->flags_int.control_act = 0; 2248 return; 2249 } 2250 /* only set transfer error if not already set */ 2251 if (!xfer->error) { 2252 xfer->error = error; 2253 } 2254 /* stop any callouts */ 2255 usb_callout_stop(&xfer->timeout_handle); 2256 2257 /* 2258 * If we are waiting on a queue, just remove the USB transfer 2259 * from the queue, if any. We should have the required locks 2260 * locked to do the remove when this function is called. 2261 */ 2262 usbd_transfer_dequeue(xfer); 2263 2264#if USB_HAVE_BUSDMA 2265 if (mtx_owned(xfer->xroot->xfer_mtx)) { 2266 struct usb_xfer_queue *pq; 2267 2268 /* 2269 * If the private USB lock is not locked, then we assume 2270 * that the BUS-DMA load stage has been passed: 2271 */ 2272 pq = &xfer->xroot->dma_q; 2273 2274 if (pq->curr == xfer) { 2275 /* start the next BUS-DMA load, if any */ 2276 usb_command_wrapper(pq, NULL); 2277 } 2278 } 2279#endif 2280 /* keep some statistics */ 2281 if (xfer->error) { 2282 xfer->xroot->bus->stats_err.uds_requests 2283 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++; 2284 } else { 2285 xfer->xroot->bus->stats_ok.uds_requests 2286 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++; 2287 } 2288 2289 /* call the USB transfer callback */ 2290 usbd_callback_ss_done_defer(xfer); 2291} 2292 2293/*------------------------------------------------------------------------* 2294 * usbd_transfer_start_cb 2295 * 2296 * This function is called to start the USB transfer when 2297 * "xfer->interval" is greater than zero, and and the endpoint type is 2298 * BULK or CONTROL. 2299 *------------------------------------------------------------------------*/ 2300static void 2301usbd_transfer_start_cb(void *arg) 2302{ 2303 struct usb_xfer *xfer = arg; 2304 struct usb_endpoint *ep = xfer->endpoint; 2305 2306 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2307 2308 DPRINTF("start\n"); 2309 2310 /* start the transfer */ 2311 (ep->methods->start) (xfer); 2312 2313 xfer->flags_int.can_cancel_immed = 1; 2314 2315 /* check for error */ 2316 if (xfer->error) { 2317 /* some error has happened */ 2318 usbd_transfer_done(xfer, 0); 2319 } 2320} 2321 2322/*------------------------------------------------------------------------* 2323 * usbd_xfer_set_stall 2324 * 2325 * This function is used to set the stall flag outside the 2326 * callback. This function is NULL safe. 2327 *------------------------------------------------------------------------*/ 2328void 2329usbd_xfer_set_stall(struct usb_xfer *xfer) 2330{ 2331 if (xfer == NULL) { 2332 /* tearing down */ 2333 return; 2334 } 2335 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 2336 2337 /* avoid any races by locking the USB mutex */ 2338 USB_BUS_LOCK(xfer->xroot->bus); 2339 xfer->flags.stall_pipe = 1; 2340 USB_BUS_UNLOCK(xfer->xroot->bus); 2341} 2342 2343int 2344usbd_xfer_is_stalled(struct usb_xfer *xfer) 2345{ 2346 return (xfer->endpoint->is_stalled); 2347} 2348 2349/*------------------------------------------------------------------------* 2350 * usbd_transfer_clear_stall 2351 * 2352 * This function is used to clear the stall flag outside the 2353 * callback. This function is NULL safe. 2354 *------------------------------------------------------------------------*/ 2355void 2356usbd_transfer_clear_stall(struct usb_xfer *xfer) 2357{ 2358 if (xfer == NULL) { 2359 /* tearing down */ 2360 return; 2361 } 2362 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED); 2363 2364 /* avoid any races by locking the USB mutex */ 2365 USB_BUS_LOCK(xfer->xroot->bus); 2366 2367 xfer->flags.stall_pipe = 0; 2368 2369 USB_BUS_UNLOCK(xfer->xroot->bus); 2370} 2371 2372/*------------------------------------------------------------------------* 2373 * usbd_pipe_start 2374 * 2375 * This function is used to add an USB transfer to the pipe transfer list. 2376 *------------------------------------------------------------------------*/ 2377void 2378usbd_pipe_start(struct usb_xfer_queue *pq) 2379{ 2380 struct usb_endpoint *ep; 2381 struct usb_xfer *xfer; 2382 uint8_t type; 2383 2384 xfer = pq->curr; 2385 ep = xfer->endpoint; 2386 2387 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2388 2389 /* 2390 * If the endpoint is already stalled we do nothing ! 2391 */ 2392 if (ep->is_stalled) { 2393 return; 2394 } 2395 /* 2396 * Check if we are supposed to stall the endpoint: 2397 */ 2398 if (xfer->flags.stall_pipe) { 2399 /* clear stall command */ 2400 xfer->flags.stall_pipe = 0; 2401 2402 /* 2403 * Only stall BULK and INTERRUPT endpoints. 2404 */ 2405 type = (ep->edesc->bmAttributes & UE_XFERTYPE); 2406 if ((type == UE_BULK) || 2407 (type == UE_INTERRUPT)) { 2408 struct usb_device *udev; 2409 struct usb_xfer_root *info; 2410 uint8_t did_stall; 2411 2412 info = xfer->xroot; 2413 udev = info->udev; 2414 did_stall = 1; 2415 2416 if (udev->flags.usb_mode == USB_MODE_DEVICE) { 2417 (udev->bus->methods->set_stall) ( 2418 udev, NULL, ep, &did_stall); 2419 } else if (udev->default_xfer[1]) { 2420 info = udev->default_xfer[1]->xroot; 2421 usb_proc_msignal( 2422 &info->bus->non_giant_callback_proc, 2423 &udev->cs_msg[0], &udev->cs_msg[1]); 2424 } else { 2425 /* should not happen */ 2426 DPRINTFN(0, "No stall handler!\n"); 2427 } 2428 /* 2429 * Check if we should stall. Some USB hardware 2430 * handles set- and clear-stall in hardware. 2431 */ 2432 if (did_stall) { 2433 /* 2434 * The transfer will be continued when 2435 * the clear-stall control endpoint 2436 * message is received. 2437 */ 2438 ep->is_stalled = 1; 2439 return; 2440 } 2441 } 2442 } 2443 /* Set or clear stall complete - special case */ 2444 if (xfer->nframes == 0) { 2445 /* we are complete */ 2446 xfer->aframes = 0; 2447 usbd_transfer_done(xfer, 0); 2448 return; 2449 } 2450 /* 2451 * Handled cases: 2452 * 2453 * 1) Start the first transfer queued. 2454 * 2455 * 2) Re-start the current USB transfer. 2456 */ 2457 /* 2458 * Check if there should be any 2459 * pre transfer start delay: 2460 */ 2461 if (xfer->interval > 0) { 2462 type = (ep->edesc->bmAttributes & UE_XFERTYPE); 2463 if ((type == UE_BULK) || 2464 (type == UE_CONTROL)) { 2465 usbd_transfer_timeout_ms(xfer, 2466 &usbd_transfer_start_cb, 2467 xfer->interval); 2468 return; 2469 } 2470 } 2471 DPRINTF("start\n"); 2472 2473 /* start USB transfer */ 2474 (ep->methods->start) (xfer); 2475 2476 xfer->flags_int.can_cancel_immed = 1; 2477 2478 /* check for error */ 2479 if (xfer->error) { 2480 /* some error has happened */ 2481 usbd_transfer_done(xfer, 0); 2482 } 2483} 2484 2485/*------------------------------------------------------------------------* 2486 * usbd_transfer_timeout_ms 2487 * 2488 * This function is used to setup a timeout on the given USB 2489 * transfer. If the timeout has been deferred the callback given by 2490 * "cb" will get called after "ms" milliseconds. 2491 *------------------------------------------------------------------------*/ 2492void 2493usbd_transfer_timeout_ms(struct usb_xfer *xfer, 2494 void (*cb) (void *arg), usb_timeout_t ms) 2495{ 2496 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED); 2497 2498 /* defer delay */ 2499 usb_callout_reset(&xfer->timeout_handle, 2500 USB_MS_TO_TICKS(ms), cb, xfer); 2501} 2502 2503/*------------------------------------------------------------------------* 2504 * usbd_callback_wrapper_sub 2505 * 2506 * - This function will update variables in an USB transfer after 2507 * that the USB transfer is complete. 2508 * 2509 * - This function is used to start the next USB transfer on the 2510 * ep transfer queue, if any. 2511 * 2512 * NOTE: In some special cases the USB transfer will not be removed from 2513 * the pipe queue, but remain first. To enforce USB transfer removal call 2514 * this function passing the error code "USB_ERR_CANCELLED". 2515 * 2516 * Return values: 2517 * 0: Success. 2518 * Else: The callback has been deferred. 2519 *------------------------------------------------------------------------*/ 2520static uint8_t 2521usbd_callback_wrapper_sub(struct usb_xfer *xfer) 2522{ 2523 struct usb_endpoint *ep; 2524 usb_frcount_t x; 2525 2526 if ((!xfer->flags_int.open) && 2527 (!xfer->flags_int.did_close)) { 2528 DPRINTF("close\n"); 2529 USB_BUS_LOCK(xfer->xroot->bus); 2530 (xfer->endpoint->methods->close) (xfer); 2531 USB_BUS_UNLOCK(xfer->xroot->bus); 2532 /* only close once */ 2533 xfer->flags_int.did_close = 1; 2534 return (1); /* wait for new callback */ 2535 } 2536 /* 2537 * If we have a non-hardware induced error we 2538 * need to do the DMA delay! 2539 */ 2540 if (((xfer->error == USB_ERR_CANCELLED) || 2541 (xfer->error == USB_ERR_TIMEOUT)) && 2542 (!xfer->flags_int.did_dma_delay)) { 2543 2544 usb_timeout_t temp; 2545 2546 /* only delay once */ 2547 xfer->flags_int.did_dma_delay = 1; 2548 2549 /* we can not cancel this delay */ 2550 xfer->flags_int.can_cancel_immed = 0; 2551 2552 temp = usbd_get_dma_delay(xfer->xroot->bus); 2553 2554 DPRINTFN(3, "DMA delay, %u ms, " 2555 "on %p\n", temp, xfer); 2556 2557 if (temp != 0) { 2558 USB_BUS_LOCK(xfer->xroot->bus); 2559 usbd_transfer_timeout_ms(xfer, 2560 &usb_dma_delay_done_cb, temp); 2561 USB_BUS_UNLOCK(xfer->xroot->bus); 2562 return (1); /* wait for new callback */ 2563 } 2564 } 2565 /* check actual number of frames */ 2566 if (xfer->aframes > xfer->nframes) { 2567 if (xfer->error == 0) { 2568 panic("%s: actual number of frames, %d, is " 2569 "greater than initial number of frames, %d!\n", 2570 __FUNCTION__, xfer->aframes, xfer->nframes); 2571 } else { 2572 /* just set some valid value */ 2573 xfer->aframes = xfer->nframes; 2574 } 2575 } 2576 /* compute actual length */ 2577 xfer->actlen = 0; 2578 2579 for (x = 0; x != xfer->aframes; x++) { 2580 xfer->actlen += xfer->frlengths[x]; 2581 } 2582 2583 /* 2584 * Frames that were not transferred get zero actual length in 2585 * case the USB device driver does not check the actual number 2586 * of frames transferred, "xfer->aframes": 2587 */ 2588 for (; x < xfer->nframes; x++) { 2589 usbd_xfer_set_frame_len(xfer, x, 0); 2590 } 2591 2592 /* check actual length */ 2593 if (xfer->actlen > xfer->sumlen) { 2594 if (xfer->error == 0) { 2595 panic("%s: actual length, %d, is greater than " 2596 "initial length, %d!\n", 2597 __FUNCTION__, xfer->actlen, xfer->sumlen); 2598 } else { 2599 /* just set some valid value */ 2600 xfer->actlen = xfer->sumlen; 2601 } 2602 } 2603 DPRINTFN(1, "xfer=%p endpoint=%p sts=%d alen=%d, slen=%d, afrm=%d, nfrm=%d\n", 2604 xfer, xfer->endpoint, xfer->error, xfer->actlen, xfer->sumlen, 2605 xfer->aframes, xfer->nframes); 2606 2607 if (xfer->error) { 2608 /* end of control transfer, if any */ 2609 xfer->flags_int.control_act = 0; 2610 2611 /* check if we should block the execution queue */ 2612 if ((xfer->error != USB_ERR_CANCELLED) && 2613 (xfer->flags.pipe_bof)) { 2614 DPRINTFN(2, "xfer=%p: Block On Failure " 2615 "on endpoint=%p\n", xfer, xfer->endpoint); 2616 goto done; 2617 } 2618 } else { 2619 /* check for short transfers */ 2620 if (xfer->actlen < xfer->sumlen) { 2621 2622 /* end of control transfer, if any */ 2623 xfer->flags_int.control_act = 0; 2624 2625 if (!xfer->flags_int.short_xfer_ok) { 2626 xfer->error = USB_ERR_SHORT_XFER; 2627 if (xfer->flags.pipe_bof) { 2628 DPRINTFN(2, "xfer=%p: Block On Failure on " 2629 "Short Transfer on endpoint %p.\n", 2630 xfer, xfer->endpoint); 2631 goto done; 2632 } 2633 } 2634 } else { 2635 /* 2636 * Check if we are in the middle of a 2637 * control transfer: 2638 */ 2639 if (xfer->flags_int.control_act) { 2640 DPRINTFN(5, "xfer=%p: Control transfer " 2641 "active on endpoint=%p\n", xfer, xfer->endpoint); 2642 goto done; 2643 } 2644 } 2645 } 2646 2647 ep = xfer->endpoint; 2648 2649 /* 2650 * If the current USB transfer is completing we need to start the 2651 * next one: 2652 */ 2653 USB_BUS_LOCK(xfer->xroot->bus); 2654 if (ep->endpoint_q.curr == xfer) { 2655 usb_command_wrapper(&ep->endpoint_q, NULL); 2656 2657 if (ep->endpoint_q.curr || TAILQ_FIRST(&ep->endpoint_q.head)) { 2658 /* there is another USB transfer waiting */ 2659 } else { 2660 /* this is the last USB transfer */ 2661 /* clear isochronous sync flag */ 2662 xfer->endpoint->is_synced = 0; 2663 } 2664 } 2665 USB_BUS_UNLOCK(xfer->xroot->bus); 2666done: 2667 return (0); 2668} 2669 2670/*------------------------------------------------------------------------* 2671 * usb_command_wrapper 2672 * 2673 * This function is used to execute commands non-recursivly on an USB 2674 * transfer. 2675 *------------------------------------------------------------------------*/ 2676void 2677usb_command_wrapper(struct usb_xfer_queue *pq, struct usb_xfer *xfer) 2678{ 2679 if (xfer) { 2680 /* 2681 * If the transfer is not already processing, 2682 * queue it! 2683 */ 2684 if (pq->curr != xfer) { 2685 usbd_transfer_enqueue(pq, xfer); 2686 if (pq->curr != NULL) { 2687 /* something is already processing */ 2688 DPRINTFN(6, "busy %p\n", pq->curr); 2689 return; 2690 } 2691 } 2692 } else { 2693 /* Get next element in queue */ 2694 pq->curr = NULL; 2695 } 2696 2697 if (!pq->recurse_1) { 2698 2699 do { 2700 2701 /* set both recurse flags */ 2702 pq->recurse_1 = 1; 2703 pq->recurse_2 = 1; 2704 2705 if (pq->curr == NULL) { 2706 xfer = TAILQ_FIRST(&pq->head); 2707 if (xfer) { 2708 TAILQ_REMOVE(&pq->head, xfer, 2709 wait_entry); 2710 xfer->wait_queue = NULL; 2711 pq->curr = xfer; 2712 } else { 2713 break; 2714 } 2715 } 2716 DPRINTFN(6, "cb %p (enter)\n", pq->curr); 2717 (pq->command) (pq); 2718 DPRINTFN(6, "cb %p (leave)\n", pq->curr); 2719 2720 } while (!pq->recurse_2); 2721 2722 /* clear first recurse flag */ 2723 pq->recurse_1 = 0; 2724 2725 } else { 2726 /* clear second recurse flag */ 2727 pq->recurse_2 = 0; 2728 } 2729} 2730 2731/*------------------------------------------------------------------------* 2732 * usbd_default_transfer_setup 2733 * 2734 * This function is used to setup the default USB control endpoint 2735 * transfer. 2736 *------------------------------------------------------------------------*/ 2737void 2738usbd_default_transfer_setup(struct usb_device *udev) 2739{ 2740 struct usb_xfer *xfer; 2741 uint8_t no_resetup; 2742 uint8_t iface_index; 2743 2744 /* check for root HUB */ 2745 if (udev->parent_hub == NULL) 2746 return; 2747repeat: 2748 2749 xfer = udev->default_xfer[0]; 2750 if (xfer) { 2751 USB_XFER_LOCK(xfer); 2752 no_resetup = 2753 ((xfer->address == udev->address) && 2754 (udev->default_ep_desc.wMaxPacketSize[0] == 2755 udev->ddesc.bMaxPacketSize)); 2756 if (udev->flags.usb_mode == USB_MODE_DEVICE) { 2757 if (no_resetup) { 2758 /* 2759 * NOTE: checking "xfer->address" and 2760 * starting the USB transfer must be 2761 * atomic! 2762 */ 2763 usbd_transfer_start(xfer); 2764 } 2765 } 2766 USB_XFER_UNLOCK(xfer); 2767 } else { 2768 no_resetup = 0; 2769 } 2770 2771 if (no_resetup) { 2772 /* 2773 * All parameters are exactly the same like before. 2774 * Just return. 2775 */ 2776 return; 2777 } 2778 /* 2779 * Update wMaxPacketSize for the default control endpoint: 2780 */ 2781 udev->default_ep_desc.wMaxPacketSize[0] = 2782 udev->ddesc.bMaxPacketSize; 2783 2784 /* 2785 * Unsetup any existing USB transfer: 2786 */ 2787 usbd_transfer_unsetup(udev->default_xfer, USB_DEFAULT_XFER_MAX); 2788 2789 /* 2790 * Try to setup a new USB transfer for the 2791 * default control endpoint: 2792 */ 2793 iface_index = 0; 2794 if (usbd_transfer_setup(udev, &iface_index, 2795 udev->default_xfer, usb_control_ep_cfg, USB_DEFAULT_XFER_MAX, NULL, 2796 udev->default_mtx)) { 2797 DPRINTFN(0, "could not setup default " 2798 "USB transfer!\n"); 2799 } else { 2800 goto repeat; 2801 } 2802} 2803 2804/*------------------------------------------------------------------------* 2805 * usbd_clear_data_toggle - factored out code 2806 * 2807 * NOTE: the intention of this function is not to reset the hardware 2808 * data toggle. 2809 *------------------------------------------------------------------------*/ 2810void 2811usbd_clear_data_toggle(struct usb_device *udev, struct usb_endpoint *ep) 2812{ 2813 DPRINTFN(5, "udev=%p endpoint=%p\n", udev, ep); 2814 2815 USB_BUS_LOCK(udev->bus); 2816 ep->toggle_next = 0; 2817 USB_BUS_UNLOCK(udev->bus); 2818} 2819 2820/*------------------------------------------------------------------------* 2821 * usbd_clear_stall_callback - factored out clear stall callback 2822 * 2823 * Input parameters: 2824 * xfer1: Clear Stall Control Transfer 2825 * xfer2: Stalled USB Transfer 2826 * 2827 * This function is NULL safe. 2828 * 2829 * Return values: 2830 * 0: In progress 2831 * Else: Finished 2832 * 2833 * Clear stall config example: 2834 * 2835 * static const struct usb_config my_clearstall = { 2836 * .type = UE_CONTROL, 2837 * .endpoint = 0, 2838 * .direction = UE_DIR_ANY, 2839 * .interval = 50, //50 milliseconds 2840 * .bufsize = sizeof(struct usb_device_request), 2841 * .timeout = 1000, //1.000 seconds 2842 * .callback = &my_clear_stall_callback, // ** 2843 * .usb_mode = USB_MODE_HOST, 2844 * }; 2845 * 2846 * ** "my_clear_stall_callback" calls "usbd_clear_stall_callback" 2847 * passing the correct parameters. 2848 *------------------------------------------------------------------------*/ 2849uint8_t 2850usbd_clear_stall_callback(struct usb_xfer *xfer1, 2851 struct usb_xfer *xfer2) 2852{ 2853 struct usb_device_request req; 2854 2855 if (xfer2 == NULL) { 2856 /* looks like we are tearing down */ 2857 DPRINTF("NULL input parameter\n"); 2858 return (0); 2859 } 2860 USB_XFER_LOCK_ASSERT(xfer1, MA_OWNED); 2861 USB_XFER_LOCK_ASSERT(xfer2, MA_OWNED); 2862 2863 switch (USB_GET_STATE(xfer1)) { 2864 case USB_ST_SETUP: 2865 2866 /* 2867 * pre-clear the data toggle to DATA0 ("umass.c" and 2868 * "ata-usb.c" depends on this) 2869 */ 2870 2871 usbd_clear_data_toggle(xfer2->xroot->udev, xfer2->endpoint); 2872 2873 /* setup a clear-stall packet */ 2874 2875 req.bmRequestType = UT_WRITE_ENDPOINT; 2876 req.bRequest = UR_CLEAR_FEATURE; 2877 USETW(req.wValue, UF_ENDPOINT_HALT); 2878 req.wIndex[0] = xfer2->endpoint->edesc->bEndpointAddress; 2879 req.wIndex[1] = 0; 2880 USETW(req.wLength, 0); 2881 2882 /* 2883 * "usbd_transfer_setup_sub()" will ensure that 2884 * we have sufficient room in the buffer for 2885 * the request structure! 2886 */ 2887 2888 /* copy in the transfer */ 2889 2890 usbd_copy_in(xfer1->frbuffers, 0, &req, sizeof(req)); 2891 2892 /* set length */ 2893 xfer1->frlengths[0] = sizeof(req); 2894 xfer1->nframes = 1; 2895 2896 usbd_transfer_submit(xfer1); 2897 return (0); 2898 2899 case USB_ST_TRANSFERRED: 2900 break; 2901 2902 default: /* Error */ 2903 if (xfer1->error == USB_ERR_CANCELLED) { 2904 return (0); 2905 } 2906 break; 2907 } 2908 return (1); /* Clear Stall Finished */ 2909} 2910 2911/*------------------------------------------------------------------------* 2912 * usbd_transfer_poll 2913 * 2914 * The following function gets called from the USB keyboard driver and 2915 * UMASS when the system has paniced. 2916 * 2917 * NOTE: It is currently not possible to resume normal operation on 2918 * the USB controller which has been polled, due to clearing of the 2919 * "up_dsleep" and "up_msleep" flags. 2920 *------------------------------------------------------------------------*/ 2921void 2922usbd_transfer_poll(struct usb_xfer **ppxfer, uint16_t max) 2923{ 2924 struct usb_xfer *xfer; 2925 struct usb_xfer_root *xroot; 2926 struct usb_device *udev; 2927 struct usb_proc_msg *pm; 2928 uint16_t n; 2929 uint16_t drop_bus; 2930 uint16_t drop_xfer; 2931 2932 for (n = 0; n != max; n++) { 2933 /* Extra checks to avoid panic */ 2934 xfer = ppxfer[n]; 2935 if (xfer == NULL) 2936 continue; /* no USB transfer */ 2937 xroot = xfer->xroot; 2938 if (xroot == NULL) 2939 continue; /* no USB root */ 2940 udev = xroot->udev; 2941 if (udev == NULL) 2942 continue; /* no USB device */ 2943 if (udev->bus == NULL) 2944 continue; /* no BUS structure */ 2945 if (udev->bus->methods == NULL) 2946 continue; /* no BUS methods */ 2947 if (udev->bus->methods->xfer_poll == NULL) 2948 continue; /* no poll method */ 2949 2950 /* make sure that the BUS mutex is not locked */ 2951 drop_bus = 0; 2952 while (mtx_owned(&xroot->udev->bus->bus_mtx)) { 2953 mtx_unlock(&xroot->udev->bus->bus_mtx); 2954 drop_bus++; 2955 } 2956 2957 /* make sure that the transfer mutex is not locked */ 2958 drop_xfer = 0; 2959 while (mtx_owned(xroot->xfer_mtx)) { 2960 mtx_unlock(xroot->xfer_mtx); 2961 drop_xfer++; 2962 } 2963 2964 /* Make sure cv_signal() and cv_broadcast() is not called */ 2965 udev->bus->control_xfer_proc.up_msleep = 0; 2966 udev->bus->explore_proc.up_msleep = 0; 2967 udev->bus->giant_callback_proc.up_msleep = 0; 2968 udev->bus->non_giant_callback_proc.up_msleep = 0; 2969 2970 /* poll USB hardware */ 2971 (udev->bus->methods->xfer_poll) (udev->bus); 2972 2973 USB_BUS_LOCK(xroot->bus); 2974 2975 /* check for clear stall */ 2976 if (udev->default_xfer[1] != NULL) { 2977 2978 /* poll clear stall start */ 2979 pm = &udev->cs_msg[0].hdr; 2980 (pm->pm_callback) (pm); 2981 /* poll clear stall done thread */ 2982 pm = &udev->default_xfer[1]-> 2983 xroot->done_m[0].hdr; 2984 (pm->pm_callback) (pm); 2985 } 2986 2987 /* poll done thread */ 2988 pm = &xroot->done_m[0].hdr; 2989 (pm->pm_callback) (pm); 2990 2991 USB_BUS_UNLOCK(xroot->bus); 2992 2993 /* restore transfer mutex */ 2994 while (drop_xfer--) 2995 mtx_lock(xroot->xfer_mtx); 2996 2997 /* restore BUS mutex */ 2998 while (drop_bus--) 2999 mtx_lock(&xroot->udev->bus->bus_mtx); 3000 } 3001} 3002 3003static void 3004usbd_get_std_packet_size(struct usb_std_packet_size *ptr, 3005 uint8_t type, enum usb_dev_speed speed) 3006{ 3007 static const uint16_t intr_range_max[USB_SPEED_MAX] = { 3008 [USB_SPEED_LOW] = 8, 3009 [USB_SPEED_FULL] = 64, 3010 [USB_SPEED_HIGH] = 1024, 3011 [USB_SPEED_VARIABLE] = 1024, 3012 [USB_SPEED_SUPER] = 1024, 3013 }; 3014 3015 static const uint16_t isoc_range_max[USB_SPEED_MAX] = { 3016 [USB_SPEED_LOW] = 0, /* invalid */ 3017 [USB_SPEED_FULL] = 1023, 3018 [USB_SPEED_HIGH] = 1024, 3019 [USB_SPEED_VARIABLE] = 3584, 3020 [USB_SPEED_SUPER] = 1024, 3021 }; 3022 3023 static const uint16_t control_min[USB_SPEED_MAX] = { 3024 [USB_SPEED_LOW] = 8, 3025 [USB_SPEED_FULL] = 8, 3026 [USB_SPEED_HIGH] = 64, 3027 [USB_SPEED_VARIABLE] = 512, 3028 [USB_SPEED_SUPER] = 512, 3029 }; 3030 3031 static const uint16_t bulk_min[USB_SPEED_MAX] = { 3032 [USB_SPEED_LOW] = 0, /* not supported */ 3033 [USB_SPEED_FULL] = 8, 3034 [USB_SPEED_HIGH] = 512, 3035 [USB_SPEED_VARIABLE] = 512, 3036 [USB_SPEED_SUPER] = 1024, 3037 }; 3038 3039 uint16_t temp; 3040 3041 memset(ptr, 0, sizeof(*ptr)); 3042 3043 switch (type) { 3044 case UE_INTERRUPT: 3045 ptr->range.max = intr_range_max[speed]; 3046 break; 3047 case UE_ISOCHRONOUS: 3048 ptr->range.max = isoc_range_max[speed]; 3049 break; 3050 default: 3051 if (type == UE_BULK) 3052 temp = bulk_min[speed]; 3053 else /* UE_CONTROL */ 3054 temp = control_min[speed]; 3055 3056 /* default is fixed */ 3057 ptr->fixed[0] = temp; 3058 ptr->fixed[1] = temp; 3059 ptr->fixed[2] = temp; 3060 ptr->fixed[3] = temp; 3061 3062 if (speed == USB_SPEED_FULL) { 3063 /* multiple sizes */ 3064 ptr->fixed[1] = 16; 3065 ptr->fixed[2] = 32; 3066 ptr->fixed[3] = 64; 3067 } 3068 if ((speed == USB_SPEED_VARIABLE) && 3069 (type == UE_BULK)) { 3070 /* multiple sizes */ 3071 ptr->fixed[2] = 1024; 3072 ptr->fixed[3] = 1536; 3073 } 3074 break; 3075 } 3076} 3077 3078void * 3079usbd_xfer_softc(struct usb_xfer *xfer) 3080{ 3081 return (xfer->priv_sc); 3082} 3083 3084void * 3085usbd_xfer_get_priv(struct usb_xfer *xfer) 3086{ 3087 return (xfer->priv_fifo); 3088} 3089 3090void 3091usbd_xfer_set_priv(struct usb_xfer *xfer, void *ptr) 3092{ 3093 xfer->priv_fifo = ptr; 3094} 3095 3096uint8_t 3097usbd_xfer_state(struct usb_xfer *xfer) 3098{ 3099 return (xfer->usb_state); 3100} 3101 3102void 3103usbd_xfer_set_flag(struct usb_xfer *xfer, int flag) 3104{ 3105 switch (flag) { 3106 case USB_FORCE_SHORT_XFER: 3107 xfer->flags.force_short_xfer = 1; 3108 break; 3109 case USB_SHORT_XFER_OK: 3110 xfer->flags.short_xfer_ok = 1; 3111 break; 3112 case USB_MULTI_SHORT_OK: 3113 xfer->flags.short_frames_ok = 1; 3114 break; 3115 case USB_MANUAL_STATUS: 3116 xfer->flags.manual_status = 1; 3117 break; 3118 } 3119} 3120 3121void 3122usbd_xfer_clr_flag(struct usb_xfer *xfer, int flag) 3123{ 3124 switch (flag) { 3125 case USB_FORCE_SHORT_XFER: 3126 xfer->flags.force_short_xfer = 0; 3127 break; 3128 case USB_SHORT_XFER_OK: 3129 xfer->flags.short_xfer_ok = 0; 3130 break; 3131 case USB_MULTI_SHORT_OK: 3132 xfer->flags.short_frames_ok = 0; 3133 break; 3134 case USB_MANUAL_STATUS: 3135 xfer->flags.manual_status = 0; 3136 break; 3137 } 3138} 3139 3140/* 3141 * The following function returns in milliseconds when the isochronous 3142 * transfer was completed by the hardware. The returned value wraps 3143 * around 65536 milliseconds. 3144 */ 3145uint16_t 3146usbd_xfer_get_timestamp(struct usb_xfer *xfer) 3147{ 3148 return (xfer->isoc_time_complete); 3149} 3150