3 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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>
35 #include <sys/module.h>
37 #include <sys/mutex.h>
38 #include <sys/condvar.h>
39 #include <sys/sysctl.h>
41 #include <sys/unistd.h>
42 #include <sys/callout.h>
43 #include <sys/malloc.h>
47 #include <dev/usb/usb.h>
48 #include <dev/usb/usbdi.h>
49 #include <dev/usb/usbdi_util.h>
51 #define USB_DEBUG_VAR usb_debug
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>
61 #include <dev/usb/usb_controller.h>
62 #include <dev/usb/usb_bus.h>
63 #include <dev/usb/usb_pf.h>
65 struct usb_std_packet_size {
67 uint16_t min; /* inclusive */
68 uint16_t max; /* inclusive */
74 static usb_callback_t usb_request_callback;
76 static const struct usb_config usb_control_ep_cfg[USB_CTRL_XFER_MAX] = {
78 /* This transfer is used for generic control endpoint transfers */
82 .endpoint = 0x00, /* Control endpoint */
83 .direction = UE_DIR_ANY,
84 .bufsize = USB_EP0_BUFSIZE, /* bytes */
85 .flags = {.proxy_buffer = 1,},
86 .callback = &usb_request_callback,
87 .usb_mode = USB_MODE_DUAL, /* both modes */
90 /* This transfer is used for generic clear stall only */
94 .endpoint = 0x00, /* Control pipe */
95 .direction = UE_DIR_ANY,
96 .bufsize = sizeof(struct usb_device_request),
97 .callback = &usb_do_clear_stall_callback,
98 .timeout = 1000, /* 1 second */
99 .interval = 50, /* 50ms */
100 .usb_mode = USB_MODE_HOST,
104 /* function prototypes */
106 static void usbd_update_max_frame_size(struct usb_xfer *);
107 static void usbd_transfer_unsetup_sub(struct usb_xfer_root *, uint8_t);
108 static void usbd_control_transfer_init(struct usb_xfer *);
109 static int usbd_setup_ctrl_transfer(struct usb_xfer *);
110 static void usb_callback_proc(struct usb_proc_msg *);
111 static void usbd_callback_ss_done_defer(struct usb_xfer *);
112 static void usbd_callback_wrapper(struct usb_xfer_queue *);
113 static void usbd_transfer_start_cb(void *);
114 static uint8_t usbd_callback_wrapper_sub(struct usb_xfer *);
115 static void usbd_get_std_packet_size(struct usb_std_packet_size *ptr,
116 uint8_t type, enum usb_dev_speed speed);
118 /*------------------------------------------------------------------------*
119 * usb_request_callback
120 *------------------------------------------------------------------------*/
122 usb_request_callback(struct usb_xfer *xfer, usb_error_t error)
124 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE)
125 usb_handle_request_callback(xfer, error);
127 usbd_do_request_callback(xfer, error);
130 /*------------------------------------------------------------------------*
131 * usbd_update_max_frame_size
133 * This function updates the maximum frame size, hence high speed USB
134 * can transfer multiple consecutive packets.
135 *------------------------------------------------------------------------*/
137 usbd_update_max_frame_size(struct usb_xfer *xfer)
139 /* compute maximum frame size */
140 /* this computation should not overflow 16-bit */
141 /* max = 15 * 1024 */
143 xfer->max_frame_size = xfer->max_packet_size * xfer->max_packet_count;
146 /*------------------------------------------------------------------------*
149 * The following function is called when we need to
150 * synchronize with DMA hardware.
153 * 0: no DMA delay required
154 * Else: milliseconds of DMA delay
155 *------------------------------------------------------------------------*/
157 usbd_get_dma_delay(struct usb_device *udev)
159 struct usb_bus_methods *mtod;
162 mtod = udev->bus->methods;
165 if (mtod->get_dma_delay) {
166 (mtod->get_dma_delay) (udev, &temp);
168 * Round up and convert to milliseconds. Note that we use
169 * 1024 milliseconds per second. to save a division.
177 /*------------------------------------------------------------------------*
178 * usbd_transfer_setup_sub_malloc
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.
187 *------------------------------------------------------------------------*/
190 usbd_transfer_setup_sub_malloc(struct usb_setup_params *parm,
191 struct usb_page_cache **ppc, usb_size_t size, usb_size_t align,
194 struct usb_page_cache *pc;
204 USB_ASSERT(align > 1, ("Invalid alignment, 0x%08x\n",
206 USB_ASSERT(size > 0, ("Invalid size = 0\n"));
209 return (0); /* nothing to allocate */
212 * Make sure that the size is aligned properly.
214 size = -((-size) & (-align));
217 * Try multi-allocation chunks to reduce the number of DMA
218 * allocations, hence DMA allocations are slow.
220 if (size >= USB_PAGE_SIZE) {
224 /* compute number of objects per page */
225 n_obj = (USB_PAGE_SIZE / size);
227 * Compute number of DMA chunks, rounded up
230 n_dma_pc = ((count + n_obj - 1) / n_obj);
233 if (parm->buf == NULL) {
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;
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;
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;
253 *ppc = parm->xfer_page_cache_ptr;
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;
260 for (x = 0; x != n_dma_pc; x++) {
263 /* compute last remainder */
267 if (usb_pc_alloc_mem(parm->dma_page_cache_ptr,
269 return (1); /* failure */
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++;
277 for (y = 0; (y != n_obj); y++, r--, pc++, pg++) {
279 /* Load sub-chunk into DMA */
280 if (usb_pc_dmamap_create(pc, size)) {
281 return (1); /* failure */
283 pc->buffer = USB_ADD_BYTES(buf, y * size);
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 */
291 mtx_unlock(pc->tag_parent->mtx);
295 parm->xfer_page_cache_ptr = pc;
296 parm->dma_page_ptr = pg;
301 /*------------------------------------------------------------------------*
302 * usbd_transfer_setup_sub - transfer setup subroutine
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"
309 *------------------------------------------------------------------------*/
311 usbd_transfer_setup_sub(struct usb_setup_params *parm)
317 struct usb_xfer *xfer = parm->curr_xfer;
318 const struct usb_config *setup = parm->curr_setup;
319 struct usb_endpoint_ss_comp_descriptor *ecomp;
320 struct usb_endpoint_descriptor *edesc;
321 struct usb_std_packet_size std_size;
322 usb_frcount_t n_frlengths;
323 usb_frcount_t n_frbuffers;
329 * Sanity check. The following parameters must be initialized before
330 * calling this function.
332 if ((parm->hc_max_packet_size == 0) ||
333 (parm->hc_max_packet_count == 0) ||
334 (parm->hc_max_frame_size == 0)) {
335 parm->err = USB_ERR_INVAL;
338 edesc = xfer->endpoint->edesc;
339 ecomp = xfer->endpoint->ecomp;
341 type = (edesc->bmAttributes & UE_XFERTYPE);
343 xfer->flags = setup->flags;
344 xfer->nframes = setup->frames;
345 xfer->timeout = setup->timeout;
346 xfer->callback = setup->callback;
347 xfer->interval = setup->interval;
348 xfer->endpointno = edesc->bEndpointAddress;
349 xfer->max_packet_size = UGETW(edesc->wMaxPacketSize);
350 xfer->max_packet_count = 1;
351 /* make a shadow copy: */
352 xfer->flags_int.usb_mode = parm->udev->flags.usb_mode;
354 parm->bufsize = setup->bufsize;
356 switch (parm->speed) {
361 xfer->max_packet_count += (xfer->max_packet_size >> 11) & 3;
363 /* check for invalid max packet count */
364 if (xfer->max_packet_count > 3)
365 xfer->max_packet_count = 3;
370 xfer->max_packet_size &= 0x7FF;
372 case USB_SPEED_SUPER:
373 xfer->max_packet_count += (xfer->max_packet_size >> 11) & 3;
376 xfer->max_packet_count += ecomp->bMaxBurst;
378 if ((xfer->max_packet_count == 0) ||
379 (xfer->max_packet_count > 16))
380 xfer->max_packet_count = 16;
384 xfer->max_packet_count = 1;
390 mult = (ecomp->bmAttributes & 3) + 1;
394 xfer->max_packet_count *= mult;
400 xfer->max_packet_size &= 0x7FF;
405 /* range check "max_packet_count" */
407 if (xfer->max_packet_count > parm->hc_max_packet_count) {
408 xfer->max_packet_count = parm->hc_max_packet_count;
410 /* filter "wMaxPacketSize" according to HC capabilities */
412 if ((xfer->max_packet_size > parm->hc_max_packet_size) ||
413 (xfer->max_packet_size == 0)) {
414 xfer->max_packet_size = parm->hc_max_packet_size;
416 /* filter "wMaxPacketSize" according to standard sizes */
418 usbd_get_std_packet_size(&std_size, type, parm->speed);
420 if (std_size.range.min || std_size.range.max) {
422 if (xfer->max_packet_size < std_size.range.min) {
423 xfer->max_packet_size = std_size.range.min;
425 if (xfer->max_packet_size > std_size.range.max) {
426 xfer->max_packet_size = std_size.range.max;
430 if (xfer->max_packet_size >= std_size.fixed[3]) {
431 xfer->max_packet_size = std_size.fixed[3];
432 } else if (xfer->max_packet_size >= std_size.fixed[2]) {
433 xfer->max_packet_size = std_size.fixed[2];
434 } else if (xfer->max_packet_size >= std_size.fixed[1]) {
435 xfer->max_packet_size = std_size.fixed[1];
437 /* only one possibility left */
438 xfer->max_packet_size = std_size.fixed[0];
442 /* compute "max_frame_size" */
444 usbd_update_max_frame_size(xfer);
446 /* check interrupt interval and transfer pre-delay */
448 if (type == UE_ISOCHRONOUS) {
450 uint16_t frame_limit;
452 xfer->interval = 0; /* not used, must be zero */
453 xfer->flags_int.isochronous_xfr = 1; /* set flag */
455 if (xfer->timeout == 0) {
457 * set a default timeout in
458 * case something goes wrong!
460 xfer->timeout = 1000 / 4;
462 switch (parm->speed) {
465 frame_limit = USB_MAX_FS_ISOC_FRAMES_PER_XFER;
469 frame_limit = USB_MAX_HS_ISOC_FRAMES_PER_XFER;
470 xfer->fps_shift = edesc->bInterval;
471 if (xfer->fps_shift > 0)
473 if (xfer->fps_shift > 3)
475 if (xfer->flags.pre_scale_frames != 0)
476 xfer->nframes <<= (3 - xfer->fps_shift);
480 if (xfer->nframes > frame_limit) {
482 * this is not going to work
485 parm->err = USB_ERR_INVAL;
488 if (xfer->nframes == 0) {
490 * this is not a valid value
492 parm->err = USB_ERR_ZERO_NFRAMES;
498 * If a value is specified use that else check the
499 * endpoint descriptor!
501 if (type == UE_INTERRUPT) {
505 if (xfer->interval == 0) {
507 xfer->interval = edesc->bInterval;
509 switch (parm->speed) {
515 if (xfer->interval < 4)
517 else if (xfer->interval > 16)
518 xfer->interval = (1 << (16 - 4));
521 (1 << (xfer->interval - 4));
526 if (xfer->interval == 0) {
528 * One millisecond is the smallest
529 * interval we support:
537 while ((temp != 0) && (temp < xfer->interval)) {
542 switch (parm->speed) {
547 xfer->fps_shift += 3;
554 * NOTE: we do not allow "max_packet_size" or "max_frame_size"
555 * to be equal to zero when setting up USB transfers, hence
556 * this leads to alot of extra code in the USB kernel.
559 if ((xfer->max_frame_size == 0) ||
560 (xfer->max_packet_size == 0)) {
564 if ((parm->bufsize <= MIN_PKT) &&
565 (type != UE_CONTROL) &&
569 xfer->max_packet_size = MIN_PKT;
570 xfer->max_packet_count = 1;
571 parm->bufsize = 0; /* automatic setup length */
572 usbd_update_max_frame_size(xfer);
575 parm->err = USB_ERR_ZERO_MAXP;
584 * check if we should setup a default
588 if (parm->bufsize == 0) {
590 parm->bufsize = xfer->max_frame_size;
592 if (type == UE_ISOCHRONOUS) {
593 parm->bufsize *= xfer->nframes;
597 * check if we are about to setup a proxy
601 if (xfer->flags.proxy_buffer) {
603 /* round bufsize up */
605 parm->bufsize += (xfer->max_frame_size - 1);
607 if (parm->bufsize < xfer->max_frame_size) {
608 /* length wrapped around */
609 parm->err = USB_ERR_INVAL;
612 /* subtract remainder */
614 parm->bufsize -= (parm->bufsize % xfer->max_frame_size);
616 /* add length of USB device request structure, if any */
618 if (type == UE_CONTROL) {
619 parm->bufsize += REQ_SIZE; /* SETUP message */
622 xfer->max_data_length = parm->bufsize;
624 /* Setup "n_frlengths" and "n_frbuffers" */
626 if (type == UE_ISOCHRONOUS) {
627 n_frlengths = xfer->nframes;
631 if (type == UE_CONTROL) {
632 xfer->flags_int.control_xfr = 1;
633 if (xfer->nframes == 0) {
634 if (parm->bufsize <= REQ_SIZE) {
636 * there will never be any data
645 if (xfer->nframes == 0) {
650 n_frlengths = xfer->nframes;
651 n_frbuffers = xfer->nframes;
655 * check if we have room for the
656 * USB device request structure:
659 if (type == UE_CONTROL) {
661 if (xfer->max_data_length < REQ_SIZE) {
662 /* length wrapped around or too small bufsize */
663 parm->err = USB_ERR_INVAL;
666 xfer->max_data_length -= REQ_SIZE;
669 * Setup "frlengths" and shadow "frlengths" for keeping the
670 * initial frame lengths when a USB transfer is complete. This
671 * information is useful when computing isochronous offsets.
673 xfer->frlengths = parm->xfer_length_ptr;
674 parm->xfer_length_ptr += 2 * n_frlengths;
676 /* setup "frbuffers" */
677 xfer->frbuffers = parm->xfer_page_cache_ptr;
678 parm->xfer_page_cache_ptr += n_frbuffers;
680 /* initialize max frame count */
681 xfer->max_frame_count = xfer->nframes;
684 * check if we need to setup
688 if (!xfer->flags.ext_buffer) {
691 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
696 USB_ADD_BYTES(parm->buf, parm->size[0]);
698 usbd_xfer_set_frame_offset(xfer, 0, 0);
700 if ((type == UE_CONTROL) && (n_frbuffers > 1)) {
701 usbd_xfer_set_frame_offset(xfer, REQ_SIZE, 1);
704 parm->size[0] += parm->bufsize;
706 /* align data again */
707 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
710 * Compute maximum buffer size
713 if (parm->bufsize_max < parm->bufsize) {
714 parm->bufsize_max = parm->bufsize;
717 if (xfer->flags_int.bdma_enable) {
719 * Setup "dma_page_ptr".
721 * Proof for formula below:
723 * Assume there are three USB frames having length "a", "b" and
724 * "c". These USB frames will at maximum need "z"
725 * "usb_page" structures. "z" is given by:
727 * z = ((a / USB_PAGE_SIZE) + 2) + ((b / USB_PAGE_SIZE) + 2) +
728 * ((c / USB_PAGE_SIZE) + 2);
730 * Constraining "a", "b" and "c" like this:
732 * (a + b + c) <= parm->bufsize
736 * z <= ((parm->bufsize / USB_PAGE_SIZE) + (3*2));
738 * Here is the general formula:
740 xfer->dma_page_ptr = parm->dma_page_ptr;
741 parm->dma_page_ptr += (2 * n_frbuffers);
742 parm->dma_page_ptr += (parm->bufsize / USB_PAGE_SIZE);
746 /* correct maximum data length */
747 xfer->max_data_length = 0;
749 /* subtract USB frame remainder from "hc_max_frame_size" */
751 xfer->max_hc_frame_size =
752 (parm->hc_max_frame_size -
753 (parm->hc_max_frame_size % xfer->max_frame_size));
755 if (xfer->max_hc_frame_size == 0) {
756 parm->err = USB_ERR_INVAL;
760 /* initialize frame buffers */
763 for (x = 0; x != n_frbuffers; x++) {
764 xfer->frbuffers[x].tag_parent =
765 &xfer->xroot->dma_parent_tag;
767 if (xfer->flags_int.bdma_enable &&
768 (parm->bufsize_max > 0)) {
770 if (usb_pc_dmamap_create(
772 parm->bufsize_max)) {
773 parm->err = USB_ERR_NOMEM;
783 * Set some dummy values so that we avoid division by zero:
785 xfer->max_hc_frame_size = 1;
786 xfer->max_frame_size = 1;
787 xfer->max_packet_size = 1;
788 xfer->max_data_length = 0;
790 xfer->max_frame_count = 0;
794 /*------------------------------------------------------------------------*
795 * usbd_transfer_setup - setup an array of USB transfers
797 * NOTE: You must always call "usbd_transfer_unsetup" after calling
798 * "usbd_transfer_setup" if success was returned.
800 * The idea is that the USB device driver should pre-allocate all its
801 * transfers by one call to this function.
806 *------------------------------------------------------------------------*/
808 usbd_transfer_setup(struct usb_device *udev,
809 const uint8_t *ifaces, struct usb_xfer **ppxfer,
810 const struct usb_config *setup_start, uint16_t n_setup,
811 void *priv_sc, struct mtx *xfer_mtx)
813 const struct usb_config *setup_end = setup_start + n_setup;
814 const struct usb_config *setup;
815 struct usb_setup_params *parm;
816 struct usb_endpoint *ep;
817 struct usb_xfer_root *info;
818 struct usb_xfer *xfer;
820 usb_error_t error = 0;
825 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
826 "usbd_transfer_setup can sleep!");
828 /* do some checking first */
831 DPRINTFN(6, "setup array has zero length!\n");
832 return (USB_ERR_INVAL);
835 DPRINTFN(6, "ifaces array is NULL!\n");
836 return (USB_ERR_INVAL);
838 if (xfer_mtx == NULL) {
839 DPRINTFN(6, "using global lock\n");
843 /* more sanity checks */
845 for (setup = setup_start, n = 0;
846 setup != setup_end; setup++, n++) {
847 if (setup->bufsize == (usb_frlength_t)-1) {
848 error = USB_ERR_BAD_BUFSIZE;
849 DPRINTF("invalid bufsize\n");
851 if (setup->callback == NULL) {
852 error = USB_ERR_NO_CALLBACK;
853 DPRINTF("no callback\n");
861 /* Protect scratch area */
862 do_unlock = usbd_enum_lock(udev);
867 parm = &udev->scratch.xfer_setup[0].parm;
868 memset(parm, 0, sizeof(*parm));
871 parm->speed = usbd_get_speed(udev);
872 parm->hc_max_packet_count = 1;
874 if (parm->speed >= USB_SPEED_MAX) {
875 parm->err = USB_ERR_INVAL;
878 /* setup all transfers */
884 * Initialize the "usb_xfer_root" structure,
885 * which is common for all our USB transfers.
887 info = USB_ADD_BYTES(buf, 0);
889 info->memory_base = buf;
890 info->memory_size = parm->size[0];
893 info->dma_page_cache_start = USB_ADD_BYTES(buf, parm->size[4]);
894 info->dma_page_cache_end = USB_ADD_BYTES(buf, parm->size[5]);
896 info->xfer_page_cache_start = USB_ADD_BYTES(buf, parm->size[5]);
897 info->xfer_page_cache_end = USB_ADD_BYTES(buf, parm->size[2]);
899 cv_init(&info->cv_drain, "WDRAIN");
901 info->xfer_mtx = xfer_mtx;
903 usb_dma_tag_setup(&info->dma_parent_tag,
904 parm->dma_tag_p, udev->bus->dma_parent_tag[0].tag,
905 xfer_mtx, &usb_bdma_done_event, 32, parm->dma_tag_max);
908 info->bus = udev->bus;
911 TAILQ_INIT(&info->done_q.head);
912 info->done_q.command = &usbd_callback_wrapper;
914 TAILQ_INIT(&info->dma_q.head);
915 info->dma_q.command = &usb_bdma_work_loop;
917 info->done_m[0].hdr.pm_callback = &usb_callback_proc;
918 info->done_m[0].xroot = info;
919 info->done_m[1].hdr.pm_callback = &usb_callback_proc;
920 info->done_m[1].xroot = info;
923 * In device side mode control endpoint
924 * requests need to run from a separate
925 * context, else there is a chance of
928 if (setup_start == usb_control_ep_cfg)
930 &udev->bus->control_xfer_proc;
931 else if (xfer_mtx == &Giant)
933 &udev->bus->giant_callback_proc;
936 &udev->bus->non_giant_callback_proc;
942 parm->size[0] += sizeof(info[0]);
944 for (setup = setup_start, n = 0;
945 setup != setup_end; setup++, n++) {
947 /* skip USB transfers without callbacks: */
948 if (setup->callback == NULL) {
951 /* see if there is a matching endpoint */
952 ep = usbd_get_endpoint(udev,
953 ifaces[setup->if_index], setup);
955 if ((ep == NULL) || (ep->methods == NULL)) {
956 if (setup->flags.no_pipe_ok)
958 if ((setup->usb_mode != USB_MODE_DUAL) &&
959 (setup->usb_mode != udev->flags.usb_mode))
961 parm->err = USB_ERR_NO_PIPE;
965 /* align data properly */
966 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
968 /* store current setup pointer */
969 parm->curr_setup = setup;
973 * Common initialization of the
974 * "usb_xfer" structure.
976 xfer = USB_ADD_BYTES(buf, parm->size[0]);
977 xfer->address = udev->address;
978 xfer->priv_sc = priv_sc;
981 usb_callout_init_mtx(&xfer->timeout_handle,
982 &udev->bus->bus_mtx, 0);
985 * Setup a dummy xfer, hence we are
986 * writing to the "usb_xfer"
987 * structure pointed to by "xfer"
988 * before we have allocated any
991 xfer = &udev->scratch.xfer_setup[0].dummy;
992 memset(xfer, 0, sizeof(*xfer));
996 /* set transfer endpoint pointer */
999 parm->size[0] += sizeof(xfer[0]);
1000 parm->methods = xfer->endpoint->methods;
1001 parm->curr_xfer = xfer;
1004 * Call the Host or Device controller transfer
1007 (udev->bus->methods->xfer_setup) (parm);
1009 /* check for error */
1015 * Increment the endpoint refcount. This
1016 * basically prevents setting a new
1017 * configuration and alternate setting
1018 * when USB transfers are in use on
1019 * the given interface. Search the USB
1020 * code for "endpoint->refcount_alloc" if you
1021 * want more information.
1023 USB_BUS_LOCK(info->bus);
1024 if (xfer->endpoint->refcount_alloc >= USB_EP_REF_MAX)
1025 parm->err = USB_ERR_INVAL;
1027 xfer->endpoint->refcount_alloc++;
1029 if (xfer->endpoint->refcount_alloc == 0)
1030 panic("usbd_transfer_setup(): Refcount wrapped to zero\n");
1031 USB_BUS_UNLOCK(info->bus);
1034 * Whenever we set ppxfer[] then we
1035 * also need to increment the
1038 info->setup_refcount++;
1041 * Transfer is successfully setup and
1047 /* check for error */
1052 if (buf != NULL || parm->err != 0)
1055 /* if no transfers, nothing to do */
1059 /* align data properly */
1060 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1062 /* store offset temporarily */
1063 parm->size[1] = parm->size[0];
1066 * The number of DMA tags required depends on
1067 * the number of endpoints. The current estimate
1068 * for maximum number of DMA tags per endpoint
1071 parm->dma_tag_max += 2 * MIN(n_setup, USB_EP_MAX);
1074 * DMA tags for QH, TD, Data and more.
1076 parm->dma_tag_max += 8;
1078 parm->dma_tag_p += parm->dma_tag_max;
1080 parm->size[0] += ((uint8_t *)parm->dma_tag_p) -
1083 /* align data properly */
1084 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1086 /* store offset temporarily */
1087 parm->size[3] = parm->size[0];
1089 parm->size[0] += ((uint8_t *)parm->dma_page_ptr) -
1092 /* align data properly */
1093 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1095 /* store offset temporarily */
1096 parm->size[4] = parm->size[0];
1098 parm->size[0] += ((uint8_t *)parm->dma_page_cache_ptr) -
1101 /* store end offset temporarily */
1102 parm->size[5] = parm->size[0];
1104 parm->size[0] += ((uint8_t *)parm->xfer_page_cache_ptr) -
1107 /* store end offset temporarily */
1109 parm->size[2] = parm->size[0];
1111 /* align data properly */
1112 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1114 parm->size[6] = parm->size[0];
1116 parm->size[0] += ((uint8_t *)parm->xfer_length_ptr) -
1119 /* align data properly */
1120 parm->size[0] += ((-parm->size[0]) & (USB_HOST_ALIGN - 1));
1122 /* allocate zeroed memory */
1123 buf = malloc(parm->size[0], M_USB, M_WAITOK | M_ZERO);
1126 parm->err = USB_ERR_NOMEM;
1127 DPRINTFN(0, "cannot allocate memory block for "
1128 "configuration (%d bytes)\n",
1132 parm->dma_tag_p = USB_ADD_BYTES(buf, parm->size[1]);
1133 parm->dma_page_ptr = USB_ADD_BYTES(buf, parm->size[3]);
1134 parm->dma_page_cache_ptr = USB_ADD_BYTES(buf, parm->size[4]);
1135 parm->xfer_page_cache_ptr = USB_ADD_BYTES(buf, parm->size[5]);
1136 parm->xfer_length_ptr = USB_ADD_BYTES(buf, parm->size[6]);
1141 if (info->setup_refcount == 0) {
1143 * "usbd_transfer_unsetup_sub" will unlock
1144 * the bus mutex before returning !
1146 USB_BUS_LOCK(info->bus);
1148 /* something went wrong */
1149 usbd_transfer_unsetup_sub(info, 0);
1153 /* check if any errors happened */
1155 usbd_transfer_unsetup(ppxfer, n_setup);
1160 usbd_enum_unlock(udev);
1165 /*------------------------------------------------------------------------*
1166 * usbd_transfer_unsetup_sub - factored out code
1167 *------------------------------------------------------------------------*/
1169 usbd_transfer_unsetup_sub(struct usb_xfer_root *info, uint8_t needs_delay)
1172 struct usb_page_cache *pc;
1175 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED);
1177 /* wait for any outstanding DMA operations */
1181 temp = usbd_get_dma_delay(info->udev);
1183 usb_pause_mtx(&info->bus->bus_mtx,
1184 USB_MS_TO_TICKS(temp));
1188 /* make sure that our done messages are not queued anywhere */
1189 usb_proc_mwait(info->done_p, &info->done_m[0], &info->done_m[1]);
1191 USB_BUS_UNLOCK(info->bus);
1194 /* free DMA'able memory, if any */
1195 pc = info->dma_page_cache_start;
1196 while (pc != info->dma_page_cache_end) {
1197 usb_pc_free_mem(pc);
1201 /* free DMA maps in all "xfer->frbuffers" */
1202 pc = info->xfer_page_cache_start;
1203 while (pc != info->xfer_page_cache_end) {
1204 usb_pc_dmamap_destroy(pc);
1208 /* free all DMA tags */
1209 usb_dma_tag_unsetup(&info->dma_parent_tag);
1212 cv_destroy(&info->cv_drain);
1215 * free the "memory_base" last, hence the "info" structure is
1216 * contained within the "memory_base"!
1218 free(info->memory_base, M_USB);
1221 /*------------------------------------------------------------------------*
1222 * usbd_transfer_unsetup - unsetup/free an array of USB transfers
1224 * NOTE: All USB transfers in progress will get called back passing
1225 * the error code "USB_ERR_CANCELLED" before this function
1227 *------------------------------------------------------------------------*/
1229 usbd_transfer_unsetup(struct usb_xfer **pxfer, uint16_t n_setup)
1231 struct usb_xfer *xfer;
1232 struct usb_xfer_root *info;
1233 uint8_t needs_delay = 0;
1235 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1236 "usbd_transfer_unsetup can sleep!");
1239 xfer = pxfer[n_setup];
1246 USB_XFER_LOCK(xfer);
1247 USB_BUS_LOCK(info->bus);
1250 * HINT: when you start/stop a transfer, it might be a
1251 * good idea to directly use the "pxfer[]" structure:
1253 * usbd_transfer_start(sc->pxfer[0]);
1254 * usbd_transfer_stop(sc->pxfer[0]);
1256 * That way, if your code has many parts that will not
1257 * stop running under the same lock, in other words
1258 * "xfer_mtx", the usbd_transfer_start and
1259 * usbd_transfer_stop functions will simply return
1260 * when they detect a NULL pointer argument.
1262 * To avoid any races we clear the "pxfer[]" pointer
1263 * while holding the private mutex of the driver:
1265 pxfer[n_setup] = NULL;
1267 USB_BUS_UNLOCK(info->bus);
1268 USB_XFER_UNLOCK(xfer);
1270 usbd_transfer_drain(xfer);
1273 if (xfer->flags_int.bdma_enable)
1277 * NOTE: default endpoint does not have an
1278 * interface, even if endpoint->iface_index == 0
1280 USB_BUS_LOCK(info->bus);
1281 xfer->endpoint->refcount_alloc--;
1282 USB_BUS_UNLOCK(info->bus);
1284 usb_callout_drain(&xfer->timeout_handle);
1286 USB_BUS_LOCK(info->bus);
1288 USB_ASSERT(info->setup_refcount != 0, ("Invalid setup "
1289 "reference count\n"));
1291 info->setup_refcount--;
1293 if (info->setup_refcount == 0) {
1294 usbd_transfer_unsetup_sub(info,
1297 USB_BUS_UNLOCK(info->bus);
1302 /*------------------------------------------------------------------------*
1303 * usbd_control_transfer_init - factored out code
1305 * In USB Device Mode we have to wait for the SETUP packet which
1306 * containst the "struct usb_device_request" structure, before we can
1307 * transfer any data. In USB Host Mode we already have the SETUP
1308 * packet at the moment the USB transfer is started. This leads us to
1309 * having to setup the USB transfer at two different places in
1310 * time. This function just contains factored out control transfer
1311 * initialisation code, so that we don't duplicate the code.
1312 *------------------------------------------------------------------------*/
1314 usbd_control_transfer_init(struct usb_xfer *xfer)
1316 struct usb_device_request req;
1318 /* copy out the USB request header */
1320 usbd_copy_out(xfer->frbuffers, 0, &req, sizeof(req));
1322 /* setup remainder */
1324 xfer->flags_int.control_rem = UGETW(req.wLength);
1326 /* copy direction to endpoint variable */
1328 xfer->endpointno &= ~(UE_DIR_IN | UE_DIR_OUT);
1330 (req.bmRequestType & UT_READ) ? UE_DIR_IN : UE_DIR_OUT;
1333 /*------------------------------------------------------------------------*
1334 * usbd_setup_ctrl_transfer
1336 * This function handles initialisation of control transfers. Control
1337 * transfers are special in that regard that they can both transmit
1343 *------------------------------------------------------------------------*/
1345 usbd_setup_ctrl_transfer(struct usb_xfer *xfer)
1349 /* Check for control endpoint stall */
1350 if (xfer->flags.stall_pipe && xfer->flags_int.control_act) {
1351 /* the control transfer is no longer active */
1352 xfer->flags_int.control_stall = 1;
1353 xfer->flags_int.control_act = 0;
1355 /* don't stall control transfer by default */
1356 xfer->flags_int.control_stall = 0;
1359 /* Check for invalid number of frames */
1360 if (xfer->nframes > 2) {
1362 * If you need to split a control transfer, you
1363 * have to do one part at a time. Only with
1364 * non-control transfers you can do multiple
1367 DPRINTFN(0, "Too many frames: %u\n",
1368 (unsigned int)xfer->nframes);
1373 * Check if there is a control
1374 * transfer in progress:
1376 if (xfer->flags_int.control_act) {
1378 if (xfer->flags_int.control_hdr) {
1380 /* clear send header flag */
1382 xfer->flags_int.control_hdr = 0;
1384 /* setup control transfer */
1385 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
1386 usbd_control_transfer_init(xfer);
1389 /* get data length */
1395 /* the size of the SETUP structure is hardcoded ! */
1397 if (xfer->frlengths[0] != sizeof(struct usb_device_request)) {
1398 DPRINTFN(0, "Wrong framelength %u != %zu\n",
1399 xfer->frlengths[0], sizeof(struct
1400 usb_device_request));
1403 /* check USB mode */
1404 if (xfer->flags_int.usb_mode == USB_MODE_DEVICE) {
1406 /* check number of frames */
1407 if (xfer->nframes != 1) {
1409 * We need to receive the setup
1410 * message first so that we know the
1413 DPRINTF("Misconfigured transfer\n");
1417 * Set a dummy "control_rem" value. This
1418 * variable will be overwritten later by a
1419 * call to "usbd_control_transfer_init()" !
1421 xfer->flags_int.control_rem = 0xFFFF;
1424 /* setup "endpoint" and "control_rem" */
1426 usbd_control_transfer_init(xfer);
1429 /* set transfer-header flag */
1431 xfer->flags_int.control_hdr = 1;
1433 /* get data length */
1435 len = (xfer->sumlen - sizeof(struct usb_device_request));
1438 /* check if there is a length mismatch */
1440 if (len > xfer->flags_int.control_rem) {
1441 DPRINTFN(0, "Length (%d) greater than "
1442 "remaining length (%d)\n", len,
1443 xfer->flags_int.control_rem);
1446 /* check if we are doing a short transfer */
1448 if (xfer->flags.force_short_xfer) {
1449 xfer->flags_int.control_rem = 0;
1451 if ((len != xfer->max_data_length) &&
1452 (len != xfer->flags_int.control_rem) &&
1453 (xfer->nframes != 1)) {
1454 DPRINTFN(0, "Short control transfer without "
1455 "force_short_xfer set\n");
1458 xfer->flags_int.control_rem -= len;
1461 /* the status part is executed when "control_act" is 0 */
1463 if ((xfer->flags_int.control_rem > 0) ||
1464 (xfer->flags.manual_status)) {
1465 /* don't execute the STATUS stage yet */
1466 xfer->flags_int.control_act = 1;
1469 if ((!xfer->flags_int.control_hdr) &&
1470 (xfer->nframes == 1)) {
1472 * This is not a valid operation!
1474 DPRINTFN(0, "Invalid parameter "
1479 /* time to execute the STATUS stage */
1480 xfer->flags_int.control_act = 0;
1482 return (0); /* success */
1485 return (1); /* failure */
1488 /*------------------------------------------------------------------------*
1489 * usbd_transfer_submit - start USB hardware for the given transfer
1491 * This function should only be called from the USB callback.
1492 *------------------------------------------------------------------------*/
1494 usbd_transfer_submit(struct usb_xfer *xfer)
1496 struct usb_xfer_root *info;
1497 struct usb_bus *bus;
1503 DPRINTF("xfer=%p, endpoint=%p, nframes=%d, dir=%s\n",
1504 xfer, xfer->endpoint, xfer->nframes, USB_GET_DATA_ISREAD(xfer) ?
1508 if (USB_DEBUG_VAR > 0) {
1511 usb_dump_endpoint(xfer->endpoint);
1513 USB_BUS_UNLOCK(bus);
1517 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1518 USB_BUS_LOCK_ASSERT(bus, MA_NOTOWNED);
1520 /* Only open the USB transfer once! */
1521 if (!xfer->flags_int.open) {
1522 xfer->flags_int.open = 1;
1527 (xfer->endpoint->methods->open) (xfer);
1528 USB_BUS_UNLOCK(bus);
1530 /* set "transferring" flag */
1531 xfer->flags_int.transferring = 1;
1534 /* increment power reference */
1535 usbd_transfer_power_ref(xfer, 1);
1538 * Check if the transfer is waiting on a queue, most
1539 * frequently the "done_q":
1541 if (xfer->wait_queue) {
1543 usbd_transfer_dequeue(xfer);
1544 USB_BUS_UNLOCK(bus);
1546 /* clear "did_dma_delay" flag */
1547 xfer->flags_int.did_dma_delay = 0;
1549 /* clear "did_close" flag */
1550 xfer->flags_int.did_close = 0;
1553 /* clear "bdma_setup" flag */
1554 xfer->flags_int.bdma_setup = 0;
1556 /* by default we cannot cancel any USB transfer immediately */
1557 xfer->flags_int.can_cancel_immed = 0;
1559 /* clear lengths and frame counts by default */
1564 /* clear any previous errors */
1567 /* Check if the device is still alive */
1568 if (info->udev->state < USB_STATE_POWERED) {
1571 * Must return cancelled error code else
1572 * device drivers can hang.
1574 usbd_transfer_done(xfer, USB_ERR_CANCELLED);
1575 USB_BUS_UNLOCK(bus);
1580 if (xfer->nframes == 0) {
1581 if (xfer->flags.stall_pipe) {
1583 * Special case - want to stall without transferring
1586 DPRINTF("xfer=%p nframes=0: stall "
1587 "or clear stall!\n", xfer);
1589 xfer->flags_int.can_cancel_immed = 1;
1590 /* start the transfer */
1591 usb_command_wrapper(&xfer->endpoint->endpoint_q, xfer);
1592 USB_BUS_UNLOCK(bus);
1596 usbd_transfer_done(xfer, USB_ERR_INVAL);
1597 USB_BUS_UNLOCK(bus);
1600 /* compute some variables */
1602 for (x = 0; x != xfer->nframes; x++) {
1603 /* make a copy of the frlenghts[] */
1604 xfer->frlengths[x + xfer->max_frame_count] = xfer->frlengths[x];
1605 /* compute total transfer length */
1606 xfer->sumlen += xfer->frlengths[x];
1607 if (xfer->sumlen < xfer->frlengths[x]) {
1608 /* length wrapped around */
1610 usbd_transfer_done(xfer, USB_ERR_INVAL);
1611 USB_BUS_UNLOCK(bus);
1616 /* clear some internal flags */
1618 xfer->flags_int.short_xfer_ok = 0;
1619 xfer->flags_int.short_frames_ok = 0;
1621 /* check if this is a control transfer */
1623 if (xfer->flags_int.control_xfr) {
1625 if (usbd_setup_ctrl_transfer(xfer)) {
1627 usbd_transfer_done(xfer, USB_ERR_STALLED);
1628 USB_BUS_UNLOCK(bus);
1633 * Setup filtered version of some transfer flags,
1634 * in case of data read direction
1636 if (USB_GET_DATA_ISREAD(xfer)) {
1638 if (xfer->flags.short_frames_ok) {
1639 xfer->flags_int.short_xfer_ok = 1;
1640 xfer->flags_int.short_frames_ok = 1;
1641 } else if (xfer->flags.short_xfer_ok) {
1642 xfer->flags_int.short_xfer_ok = 1;
1644 /* check for control transfer */
1645 if (xfer->flags_int.control_xfr) {
1647 * 1) Control transfers do not support
1648 * reception of multiple short USB
1649 * frames in host mode and device side
1650 * mode, with exception of:
1652 * 2) Due to sometimes buggy device
1653 * side firmware we need to do a
1654 * STATUS stage in case of short
1655 * control transfers in USB host mode.
1656 * The STATUS stage then becomes the
1657 * "alt_next" to the DATA stage.
1659 xfer->flags_int.short_frames_ok = 1;
1664 * Check if BUS-DMA support is enabled and try to load virtual
1665 * buffers into DMA, if any:
1668 if (xfer->flags_int.bdma_enable) {
1669 /* insert the USB transfer last in the BUS-DMA queue */
1670 usb_command_wrapper(&xfer->xroot->dma_q, xfer);
1675 * Enter the USB transfer into the Host Controller or
1676 * Device Controller schedule:
1678 usbd_pipe_enter(xfer);
1681 /*------------------------------------------------------------------------*
1682 * usbd_pipe_enter - factored out code
1683 *------------------------------------------------------------------------*/
1685 usbd_pipe_enter(struct usb_xfer *xfer)
1687 struct usb_endpoint *ep;
1689 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1691 USB_BUS_LOCK(xfer->xroot->bus);
1693 ep = xfer->endpoint;
1697 /* the transfer can now be cancelled */
1698 xfer->flags_int.can_cancel_immed = 1;
1700 /* enter the transfer */
1701 (ep->methods->enter) (xfer);
1703 /* check for transfer error */
1705 /* some error has happened */
1706 usbd_transfer_done(xfer, 0);
1707 USB_BUS_UNLOCK(xfer->xroot->bus);
1711 /* start the transfer */
1712 usb_command_wrapper(&ep->endpoint_q, xfer);
1713 USB_BUS_UNLOCK(xfer->xroot->bus);
1716 /*------------------------------------------------------------------------*
1717 * usbd_transfer_start - start an USB transfer
1719 * NOTE: Calling this function more than one time will only
1720 * result in a single transfer start, until the USB transfer
1722 *------------------------------------------------------------------------*/
1724 usbd_transfer_start(struct usb_xfer *xfer)
1727 /* transfer is gone */
1730 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1732 /* mark the USB transfer started */
1734 if (!xfer->flags_int.started) {
1735 /* lock the BUS lock to avoid races updating flags_int */
1736 USB_BUS_LOCK(xfer->xroot->bus);
1737 xfer->flags_int.started = 1;
1738 USB_BUS_UNLOCK(xfer->xroot->bus);
1740 /* check if the USB transfer callback is already transferring */
1742 if (xfer->flags_int.transferring) {
1745 USB_BUS_LOCK(xfer->xroot->bus);
1746 /* call the USB transfer callback */
1747 usbd_callback_ss_done_defer(xfer);
1748 USB_BUS_UNLOCK(xfer->xroot->bus);
1751 /*------------------------------------------------------------------------*
1752 * usbd_transfer_stop - stop an USB transfer
1754 * NOTE: Calling this function more than one time will only
1755 * result in a single transfer stop.
1756 * NOTE: When this function returns it is not safe to free nor
1757 * reuse any DMA buffers. See "usbd_transfer_drain()".
1758 *------------------------------------------------------------------------*/
1760 usbd_transfer_stop(struct usb_xfer *xfer)
1762 struct usb_endpoint *ep;
1765 /* transfer is gone */
1768 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1770 /* check if the USB transfer was ever opened */
1772 if (!xfer->flags_int.open) {
1773 if (xfer->flags_int.started) {
1774 /* nothing to do except clearing the "started" flag */
1775 /* lock the BUS lock to avoid races updating flags_int */
1776 USB_BUS_LOCK(xfer->xroot->bus);
1777 xfer->flags_int.started = 0;
1778 USB_BUS_UNLOCK(xfer->xroot->bus);
1782 /* try to stop the current USB transfer */
1784 USB_BUS_LOCK(xfer->xroot->bus);
1785 /* override any previous error */
1786 xfer->error = USB_ERR_CANCELLED;
1789 * Clear "open" and "started" when both private and USB lock
1790 * is locked so that we don't get a race updating "flags_int"
1792 xfer->flags_int.open = 0;
1793 xfer->flags_int.started = 0;
1796 * Check if we can cancel the USB transfer immediately.
1798 if (xfer->flags_int.transferring) {
1799 if (xfer->flags_int.can_cancel_immed &&
1800 (!xfer->flags_int.did_close)) {
1803 * The following will lead to an USB_ERR_CANCELLED
1804 * error code being passed to the USB callback.
1806 (xfer->endpoint->methods->close) (xfer);
1807 /* only close once */
1808 xfer->flags_int.did_close = 1;
1810 /* need to wait for the next done callback */
1815 /* close here and now */
1816 (xfer->endpoint->methods->close) (xfer);
1819 * Any additional DMA delay is done by
1820 * "usbd_transfer_unsetup()".
1824 * Special case. Check if we need to restart a blocked
1827 ep = xfer->endpoint;
1830 * If the current USB transfer is completing we need
1831 * to start the next one:
1833 if (ep->endpoint_q.curr == xfer) {
1834 usb_command_wrapper(&ep->endpoint_q, NULL);
1838 USB_BUS_UNLOCK(xfer->xroot->bus);
1841 /*------------------------------------------------------------------------*
1842 * usbd_transfer_pending
1844 * This function will check if an USB transfer is pending which is a
1845 * little bit complicated!
1848 * 1: Pending: The USB transfer will receive a callback in the future.
1849 *------------------------------------------------------------------------*/
1851 usbd_transfer_pending(struct usb_xfer *xfer)
1853 struct usb_xfer_root *info;
1854 struct usb_xfer_queue *pq;
1857 /* transfer is gone */
1860 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
1862 if (xfer->flags_int.transferring) {
1866 USB_BUS_LOCK(xfer->xroot->bus);
1867 if (xfer->wait_queue) {
1868 /* we are waiting on a queue somewhere */
1869 USB_BUS_UNLOCK(xfer->xroot->bus);
1875 if (pq->curr == xfer) {
1876 /* we are currently scheduled for callback */
1877 USB_BUS_UNLOCK(xfer->xroot->bus);
1880 /* we are not pending */
1881 USB_BUS_UNLOCK(xfer->xroot->bus);
1885 /*------------------------------------------------------------------------*
1886 * usbd_transfer_drain
1888 * This function will stop the USB transfer and wait for any
1889 * additional BUS-DMA and HW-DMA operations to complete. Buffers that
1890 * are loaded into DMA can safely be freed or reused after that this
1891 * function has returned.
1892 *------------------------------------------------------------------------*/
1894 usbd_transfer_drain(struct usb_xfer *xfer)
1896 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
1897 "usbd_transfer_drain can sleep!");
1900 /* transfer is gone */
1903 if (xfer->xroot->xfer_mtx != &Giant) {
1904 USB_XFER_LOCK_ASSERT(xfer, MA_NOTOWNED);
1906 USB_XFER_LOCK(xfer);
1908 usbd_transfer_stop(xfer);
1910 while (usbd_transfer_pending(xfer) ||
1911 xfer->flags_int.doing_callback) {
1914 * It is allowed that the callback can drop its
1915 * transfer mutex. In that case checking only
1916 * "usbd_transfer_pending()" is not enough to tell if
1917 * the USB transfer is fully drained. We also need to
1918 * check the internal "doing_callback" flag.
1920 xfer->flags_int.draining = 1;
1923 * Wait until the current outstanding USB
1924 * transfer is complete !
1926 cv_wait(&xfer->xroot->cv_drain, xfer->xroot->xfer_mtx);
1928 USB_XFER_UNLOCK(xfer);
1931 struct usb_page_cache *
1932 usbd_xfer_get_frame(struct usb_xfer *xfer, usb_frcount_t frindex)
1934 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
1936 return (&xfer->frbuffers[frindex]);
1940 usbd_xfer_get_frame_buffer(struct usb_xfer *xfer, usb_frcount_t frindex)
1942 struct usb_page_search page_info;
1944 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
1946 usbd_get_page(&xfer->frbuffers[frindex], 0, &page_info);
1947 return (page_info.buffer);
1950 /*------------------------------------------------------------------------*
1951 * usbd_xfer_get_fps_shift
1953 * The following function is only useful for isochronous transfers. It
1954 * returns how many times the frame execution rate has been shifted
1960 *------------------------------------------------------------------------*/
1962 usbd_xfer_get_fps_shift(struct usb_xfer *xfer)
1964 return (xfer->fps_shift);
1968 usbd_xfer_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex)
1970 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
1972 return (xfer->frlengths[frindex]);
1975 /*------------------------------------------------------------------------*
1976 * usbd_xfer_set_frame_data
1978 * This function sets the pointer of the buffer that should
1979 * loaded directly into DMA for the given USB frame. Passing "ptr"
1980 * equal to NULL while the corresponding "frlength" is greater
1981 * than zero gives undefined results!
1982 *------------------------------------------------------------------------*/
1984 usbd_xfer_set_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex,
1985 void *ptr, usb_frlength_t len)
1987 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
1989 /* set virtual address to load and length */
1990 xfer->frbuffers[frindex].buffer = ptr;
1991 usbd_xfer_set_frame_len(xfer, frindex, len);
1995 usbd_xfer_frame_data(struct usb_xfer *xfer, usb_frcount_t frindex,
1996 void **ptr, int *len)
1998 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2001 *ptr = xfer->frbuffers[frindex].buffer;
2003 *len = xfer->frlengths[frindex];
2006 /*------------------------------------------------------------------------*
2007 * usbd_xfer_old_frame_length
2009 * This function returns the framelength of the given frame at the
2010 * time the transfer was submitted. This function can be used to
2011 * compute the starting data pointer of the next isochronous frame
2012 * when an isochronous transfer has completed.
2013 *------------------------------------------------------------------------*/
2015 usbd_xfer_old_frame_length(struct usb_xfer *xfer, usb_frcount_t frindex)
2017 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2019 return (xfer->frlengths[frindex + xfer->max_frame_count]);
2023 usbd_xfer_status(struct usb_xfer *xfer, int *actlen, int *sumlen, int *aframes,
2027 *actlen = xfer->actlen;
2029 *sumlen = xfer->sumlen;
2030 if (aframes != NULL)
2031 *aframes = xfer->aframes;
2032 if (nframes != NULL)
2033 *nframes = xfer->nframes;
2036 /*------------------------------------------------------------------------*
2037 * usbd_xfer_set_frame_offset
2039 * This function sets the frame data buffer offset relative to the beginning
2040 * of the USB DMA buffer allocated for this USB transfer.
2041 *------------------------------------------------------------------------*/
2043 usbd_xfer_set_frame_offset(struct usb_xfer *xfer, usb_frlength_t offset,
2044 usb_frcount_t frindex)
2046 KASSERT(!xfer->flags.ext_buffer, ("Cannot offset data frame "
2047 "when the USB buffer is external\n"));
2048 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2050 /* set virtual address to load */
2051 xfer->frbuffers[frindex].buffer =
2052 USB_ADD_BYTES(xfer->local_buffer, offset);
2056 usbd_xfer_set_interval(struct usb_xfer *xfer, int i)
2062 usbd_xfer_set_timeout(struct usb_xfer *xfer, int t)
2068 usbd_xfer_set_frames(struct usb_xfer *xfer, usb_frcount_t n)
2074 usbd_xfer_max_frames(struct usb_xfer *xfer)
2076 return (xfer->max_frame_count);
2080 usbd_xfer_max_len(struct usb_xfer *xfer)
2082 return (xfer->max_data_length);
2086 usbd_xfer_max_framelen(struct usb_xfer *xfer)
2088 return (xfer->max_frame_size);
2092 usbd_xfer_set_frame_len(struct usb_xfer *xfer, usb_frcount_t frindex,
2095 KASSERT(frindex < xfer->max_frame_count, ("frame index overflow"));
2097 xfer->frlengths[frindex] = len;
2100 /*------------------------------------------------------------------------*
2101 * usb_callback_proc - factored out code
2103 * This function performs USB callbacks.
2104 *------------------------------------------------------------------------*/
2106 usb_callback_proc(struct usb_proc_msg *_pm)
2108 struct usb_done_msg *pm = (void *)_pm;
2109 struct usb_xfer_root *info = pm->xroot;
2111 /* Change locking order */
2112 USB_BUS_UNLOCK(info->bus);
2115 * We exploit the fact that the mutex is the same for all
2116 * callbacks that will be called from this thread:
2118 mtx_lock(info->xfer_mtx);
2119 USB_BUS_LOCK(info->bus);
2121 /* Continue where we lost track */
2122 usb_command_wrapper(&info->done_q,
2125 mtx_unlock(info->xfer_mtx);
2128 /*------------------------------------------------------------------------*
2129 * usbd_callback_ss_done_defer
2131 * This function will defer the start, stop and done callback to the
2133 *------------------------------------------------------------------------*/
2135 usbd_callback_ss_done_defer(struct usb_xfer *xfer)
2137 struct usb_xfer_root *info = xfer->xroot;
2138 struct usb_xfer_queue *pq = &info->done_q;
2140 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2142 if (pq->curr != xfer) {
2143 usbd_transfer_enqueue(pq, xfer);
2145 if (!pq->recurse_1) {
2148 * We have to postpone the callback due to the fact we
2149 * will have a Lock Order Reversal, LOR, if we try to
2152 if (usb_proc_msignal(info->done_p,
2153 &info->done_m[0], &info->done_m[1])) {
2157 /* clear second recurse flag */
2164 /*------------------------------------------------------------------------*
2165 * usbd_callback_wrapper
2167 * This is a wrapper for USB callbacks. This wrapper does some
2168 * auto-magic things like figuring out if we can call the callback
2169 * directly from the current context or if we need to wakeup the
2170 * interrupt process.
2171 *------------------------------------------------------------------------*/
2173 usbd_callback_wrapper(struct usb_xfer_queue *pq)
2175 struct usb_xfer *xfer = pq->curr;
2176 struct usb_xfer_root *info = xfer->xroot;
2178 USB_BUS_LOCK_ASSERT(info->bus, MA_OWNED);
2179 if (!mtx_owned(info->xfer_mtx) && !SCHEDULER_STOPPED()) {
2181 * Cases that end up here:
2183 * 5) HW interrupt done callback or other source.
2185 DPRINTFN(3, "case 5\n");
2188 * We have to postpone the callback due to the fact we
2189 * will have a Lock Order Reversal, LOR, if we try to
2192 if (usb_proc_msignal(info->done_p,
2193 &info->done_m[0], &info->done_m[1])) {
2199 * Cases that end up here:
2201 * 1) We are starting a transfer
2202 * 2) We are prematurely calling back a transfer
2203 * 3) We are stopping a transfer
2204 * 4) We are doing an ordinary callback
2206 DPRINTFN(3, "case 1-4\n");
2207 /* get next USB transfer in the queue */
2208 info->done_q.curr = NULL;
2210 /* set flag in case of drain */
2211 xfer->flags_int.doing_callback = 1;
2213 USB_BUS_UNLOCK(info->bus);
2214 USB_BUS_LOCK_ASSERT(info->bus, MA_NOTOWNED);
2216 /* set correct USB state for callback */
2217 if (!xfer->flags_int.transferring) {
2218 xfer->usb_state = USB_ST_SETUP;
2219 if (!xfer->flags_int.started) {
2220 /* we got stopped before we even got started */
2221 USB_BUS_LOCK(info->bus);
2226 if (usbd_callback_wrapper_sub(xfer)) {
2227 /* the callback has been deferred */
2228 USB_BUS_LOCK(info->bus);
2232 /* decrement power reference */
2233 usbd_transfer_power_ref(xfer, -1);
2235 xfer->flags_int.transferring = 0;
2238 xfer->usb_state = USB_ST_ERROR;
2240 /* set transferred state */
2241 xfer->usb_state = USB_ST_TRANSFERRED;
2243 /* sync DMA memory, if any */
2244 if (xfer->flags_int.bdma_enable &&
2245 (!xfer->flags_int.bdma_no_post_sync)) {
2246 usb_bdma_post_sync(xfer);
2253 if (xfer->usb_state != USB_ST_SETUP)
2254 usbpf_xfertap(xfer, USBPF_XFERTAP_DONE);
2256 /* call processing routine */
2257 (xfer->callback) (xfer, xfer->error);
2259 /* pickup the USB mutex again */
2260 USB_BUS_LOCK(info->bus);
2263 * Check if we got started after that we got cancelled, but
2264 * before we managed to do the callback.
2266 if ((!xfer->flags_int.open) &&
2267 (xfer->flags_int.started) &&
2268 (xfer->usb_state == USB_ST_ERROR)) {
2269 /* clear flag in case of drain */
2270 xfer->flags_int.doing_callback = 0;
2271 /* try to loop, but not recursivly */
2272 usb_command_wrapper(&info->done_q, xfer);
2277 /* clear flag in case of drain */
2278 xfer->flags_int.doing_callback = 0;
2281 * Check if we are draining.
2283 if (xfer->flags_int.draining &&
2284 (!xfer->flags_int.transferring)) {
2285 /* "usbd_transfer_drain()" is waiting for end of transfer */
2286 xfer->flags_int.draining = 0;
2287 cv_broadcast(&info->cv_drain);
2290 /* do the next callback, if any */
2291 usb_command_wrapper(&info->done_q,
2295 /*------------------------------------------------------------------------*
2296 * usb_dma_delay_done_cb
2298 * This function is called when the DMA delay has been exectuded, and
2299 * will make sure that the callback is called to complete the USB
2300 * transfer. This code path is ususally only used when there is an USB
2301 * error like USB_ERR_CANCELLED.
2302 *------------------------------------------------------------------------*/
2304 usb_dma_delay_done_cb(struct usb_xfer *xfer)
2306 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2308 DPRINTFN(3, "Completed %p\n", xfer);
2310 /* queue callback for execution, again */
2311 usbd_transfer_done(xfer, 0);
2314 /*------------------------------------------------------------------------*
2315 * usbd_transfer_dequeue
2317 * - This function is used to remove an USB transfer from a USB
2320 * - This function can be called multiple times in a row.
2321 *------------------------------------------------------------------------*/
2323 usbd_transfer_dequeue(struct usb_xfer *xfer)
2325 struct usb_xfer_queue *pq;
2327 pq = xfer->wait_queue;
2329 TAILQ_REMOVE(&pq->head, xfer, wait_entry);
2330 xfer->wait_queue = NULL;
2334 /*------------------------------------------------------------------------*
2335 * usbd_transfer_enqueue
2337 * - This function is used to insert an USB transfer into a USB *
2340 * - This function can be called multiple times in a row.
2341 *------------------------------------------------------------------------*/
2343 usbd_transfer_enqueue(struct usb_xfer_queue *pq, struct usb_xfer *xfer)
2346 * Insert the USB transfer into the queue, if it is not
2347 * already on a USB transfer queue:
2349 if (xfer->wait_queue == NULL) {
2350 xfer->wait_queue = pq;
2351 TAILQ_INSERT_TAIL(&pq->head, xfer, wait_entry);
2355 /*------------------------------------------------------------------------*
2356 * usbd_transfer_done
2358 * - This function is used to remove an USB transfer from the busdma,
2359 * pipe or interrupt queue.
2361 * - This function is used to queue the USB transfer on the done
2364 * - This function is used to stop any USB transfer timeouts.
2365 *------------------------------------------------------------------------*/
2367 usbd_transfer_done(struct usb_xfer *xfer, usb_error_t error)
2369 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2371 DPRINTF("err=%s\n", usbd_errstr(error));
2374 * If we are not transferring then just return.
2375 * This can happen during transfer cancel.
2377 if (!xfer->flags_int.transferring) {
2378 DPRINTF("not transferring\n");
2379 /* end of control transfer, if any */
2380 xfer->flags_int.control_act = 0;
2383 /* only set transfer error if not already set */
2385 xfer->error = error;
2387 /* stop any callouts */
2388 usb_callout_stop(&xfer->timeout_handle);
2391 * If we are waiting on a queue, just remove the USB transfer
2392 * from the queue, if any. We should have the required locks
2393 * locked to do the remove when this function is called.
2395 usbd_transfer_dequeue(xfer);
2398 if (mtx_owned(xfer->xroot->xfer_mtx)) {
2399 struct usb_xfer_queue *pq;
2402 * If the private USB lock is not locked, then we assume
2403 * that the BUS-DMA load stage has been passed:
2405 pq = &xfer->xroot->dma_q;
2407 if (pq->curr == xfer) {
2408 /* start the next BUS-DMA load, if any */
2409 usb_command_wrapper(pq, NULL);
2413 /* keep some statistics */
2415 xfer->xroot->bus->stats_err.uds_requests
2416 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++;
2418 xfer->xroot->bus->stats_ok.uds_requests
2419 [xfer->endpoint->edesc->bmAttributes & UE_XFERTYPE]++;
2422 /* call the USB transfer callback */
2423 usbd_callback_ss_done_defer(xfer);
2426 /*------------------------------------------------------------------------*
2427 * usbd_transfer_start_cb
2429 * This function is called to start the USB transfer when
2430 * "xfer->interval" is greater than zero, and and the endpoint type is
2432 *------------------------------------------------------------------------*/
2434 usbd_transfer_start_cb(void *arg)
2436 struct usb_xfer *xfer = arg;
2437 struct usb_endpoint *ep = xfer->endpoint;
2439 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2444 usbpf_xfertap(xfer, USBPF_XFERTAP_SUBMIT);
2447 /* the transfer can now be cancelled */
2448 xfer->flags_int.can_cancel_immed = 1;
2450 /* start USB transfer, if no error */
2451 if (xfer->error == 0)
2452 (ep->methods->start) (xfer);
2454 /* check for transfer error */
2456 /* some error has happened */
2457 usbd_transfer_done(xfer, 0);
2461 /*------------------------------------------------------------------------*
2462 * usbd_xfer_set_stall
2464 * This function is used to set the stall flag outside the
2465 * callback. This function is NULL safe.
2466 *------------------------------------------------------------------------*/
2468 usbd_xfer_set_stall(struct usb_xfer *xfer)
2474 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2476 /* avoid any races by locking the USB mutex */
2477 USB_BUS_LOCK(xfer->xroot->bus);
2478 xfer->flags.stall_pipe = 1;
2479 USB_BUS_UNLOCK(xfer->xroot->bus);
2483 usbd_xfer_is_stalled(struct usb_xfer *xfer)
2485 return (xfer->endpoint->is_stalled);
2488 /*------------------------------------------------------------------------*
2489 * usbd_transfer_clear_stall
2491 * This function is used to clear the stall flag outside the
2492 * callback. This function is NULL safe.
2493 *------------------------------------------------------------------------*/
2495 usbd_transfer_clear_stall(struct usb_xfer *xfer)
2501 USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
2503 /* avoid any races by locking the USB mutex */
2504 USB_BUS_LOCK(xfer->xroot->bus);
2506 xfer->flags.stall_pipe = 0;
2508 USB_BUS_UNLOCK(xfer->xroot->bus);
2511 /*------------------------------------------------------------------------*
2514 * This function is used to add an USB transfer to the pipe transfer list.
2515 *------------------------------------------------------------------------*/
2517 usbd_pipe_start(struct usb_xfer_queue *pq)
2519 struct usb_endpoint *ep;
2520 struct usb_xfer *xfer;
2524 ep = xfer->endpoint;
2526 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2529 * If the endpoint is already stalled we do nothing !
2531 if (ep->is_stalled) {
2535 * Check if we are supposed to stall the endpoint:
2537 if (xfer->flags.stall_pipe) {
2538 struct usb_device *udev;
2539 struct usb_xfer_root *info;
2541 /* clear stall command */
2542 xfer->flags.stall_pipe = 0;
2544 /* get pointer to USB device */
2549 * Only stall BULK and INTERRUPT endpoints.
2551 type = (ep->edesc->bmAttributes & UE_XFERTYPE);
2552 if ((type == UE_BULK) ||
2553 (type == UE_INTERRUPT)) {
2558 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2559 (udev->bus->methods->set_stall) (
2560 udev, NULL, ep, &did_stall);
2561 } else if (udev->ctrl_xfer[1]) {
2562 info = udev->ctrl_xfer[1]->xroot;
2564 &info->bus->non_giant_callback_proc,
2565 &udev->cs_msg[0], &udev->cs_msg[1]);
2567 /* should not happen */
2568 DPRINTFN(0, "No stall handler\n");
2571 * Check if we should stall. Some USB hardware
2572 * handles set- and clear-stall in hardware.
2576 * The transfer will be continued when
2577 * the clear-stall control endpoint
2578 * message is received.
2583 } else if (type == UE_ISOCHRONOUS) {
2586 * Make sure any FIFO overflow or other FIFO
2587 * error conditions go away by resetting the
2588 * endpoint FIFO through the clear stall
2591 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2592 (udev->bus->methods->clear_stall) (udev, ep);
2596 /* Set or clear stall complete - special case */
2597 if (xfer->nframes == 0) {
2598 /* we are complete */
2600 usbd_transfer_done(xfer, 0);
2606 * 1) Start the first transfer queued.
2608 * 2) Re-start the current USB transfer.
2611 * Check if there should be any
2612 * pre transfer start delay:
2614 if (xfer->interval > 0) {
2615 type = (ep->edesc->bmAttributes & UE_XFERTYPE);
2616 if ((type == UE_BULK) ||
2617 (type == UE_CONTROL)) {
2618 usbd_transfer_timeout_ms(xfer,
2619 &usbd_transfer_start_cb,
2627 usbpf_xfertap(xfer, USBPF_XFERTAP_SUBMIT);
2629 /* the transfer can now be cancelled */
2630 xfer->flags_int.can_cancel_immed = 1;
2632 /* start USB transfer, if no error */
2633 if (xfer->error == 0)
2634 (ep->methods->start) (xfer);
2636 /* check for transfer error */
2638 /* some error has happened */
2639 usbd_transfer_done(xfer, 0);
2643 /*------------------------------------------------------------------------*
2644 * usbd_transfer_timeout_ms
2646 * This function is used to setup a timeout on the given USB
2647 * transfer. If the timeout has been deferred the callback given by
2648 * "cb" will get called after "ms" milliseconds.
2649 *------------------------------------------------------------------------*/
2651 usbd_transfer_timeout_ms(struct usb_xfer *xfer,
2652 void (*cb) (void *arg), usb_timeout_t ms)
2654 USB_BUS_LOCK_ASSERT(xfer->xroot->bus, MA_OWNED);
2657 usb_callout_reset(&xfer->timeout_handle,
2658 USB_MS_TO_TICKS(ms), cb, xfer);
2661 /*------------------------------------------------------------------------*
2662 * usbd_callback_wrapper_sub
2664 * - This function will update variables in an USB transfer after
2665 * that the USB transfer is complete.
2667 * - This function is used to start the next USB transfer on the
2668 * ep transfer queue, if any.
2670 * NOTE: In some special cases the USB transfer will not be removed from
2671 * the pipe queue, but remain first. To enforce USB transfer removal call
2672 * this function passing the error code "USB_ERR_CANCELLED".
2676 * Else: The callback has been deferred.
2677 *------------------------------------------------------------------------*/
2679 usbd_callback_wrapper_sub(struct usb_xfer *xfer)
2681 struct usb_endpoint *ep;
2682 struct usb_bus *bus;
2685 bus = xfer->xroot->bus;
2687 if ((!xfer->flags_int.open) &&
2688 (!xfer->flags_int.did_close)) {
2691 (xfer->endpoint->methods->close) (xfer);
2692 USB_BUS_UNLOCK(bus);
2693 /* only close once */
2694 xfer->flags_int.did_close = 1;
2695 return (1); /* wait for new callback */
2698 * If we have a non-hardware induced error we
2699 * need to do the DMA delay!
2701 if (xfer->error != 0 && !xfer->flags_int.did_dma_delay &&
2702 (xfer->error == USB_ERR_CANCELLED ||
2703 xfer->error == USB_ERR_TIMEOUT ||
2704 bus->methods->start_dma_delay != NULL)) {
2708 /* only delay once */
2709 xfer->flags_int.did_dma_delay = 1;
2711 /* we can not cancel this delay */
2712 xfer->flags_int.can_cancel_immed = 0;
2714 temp = usbd_get_dma_delay(xfer->xroot->udev);
2716 DPRINTFN(3, "DMA delay, %u ms, "
2717 "on %p\n", temp, xfer);
2722 * Some hardware solutions have dedicated
2723 * events when it is safe to free DMA'ed
2724 * memory. For the other hardware platforms we
2725 * use a static delay.
2727 if (bus->methods->start_dma_delay != NULL) {
2728 (bus->methods->start_dma_delay) (xfer);
2730 usbd_transfer_timeout_ms(xfer,
2731 (void (*)(void *))&usb_dma_delay_done_cb,
2734 USB_BUS_UNLOCK(bus);
2735 return (1); /* wait for new callback */
2738 /* check actual number of frames */
2739 if (xfer->aframes > xfer->nframes) {
2740 if (xfer->error == 0) {
2741 panic("%s: actual number of frames, %d, is "
2742 "greater than initial number of frames, %d\n",
2743 __FUNCTION__, xfer->aframes, xfer->nframes);
2745 /* just set some valid value */
2746 xfer->aframes = xfer->nframes;
2749 /* compute actual length */
2752 for (x = 0; x != xfer->aframes; x++) {
2753 xfer->actlen += xfer->frlengths[x];
2757 * Frames that were not transferred get zero actual length in
2758 * case the USB device driver does not check the actual number
2759 * of frames transferred, "xfer->aframes":
2761 for (; x < xfer->nframes; x++) {
2762 usbd_xfer_set_frame_len(xfer, x, 0);
2765 /* check actual length */
2766 if (xfer->actlen > xfer->sumlen) {
2767 if (xfer->error == 0) {
2768 panic("%s: actual length, %d, is greater than "
2769 "initial length, %d\n",
2770 __FUNCTION__, xfer->actlen, xfer->sumlen);
2772 /* just set some valid value */
2773 xfer->actlen = xfer->sumlen;
2776 DPRINTFN(1, "xfer=%p endpoint=%p sts=%d alen=%d, slen=%d, afrm=%d, nfrm=%d\n",
2777 xfer, xfer->endpoint, xfer->error, xfer->actlen, xfer->sumlen,
2778 xfer->aframes, xfer->nframes);
2781 /* end of control transfer, if any */
2782 xfer->flags_int.control_act = 0;
2784 /* check if we should block the execution queue */
2785 if ((xfer->error != USB_ERR_CANCELLED) &&
2786 (xfer->flags.pipe_bof)) {
2787 DPRINTFN(2, "xfer=%p: Block On Failure "
2788 "on endpoint=%p\n", xfer, xfer->endpoint);
2792 /* check for short transfers */
2793 if (xfer->actlen < xfer->sumlen) {
2795 /* end of control transfer, if any */
2796 xfer->flags_int.control_act = 0;
2798 if (!xfer->flags_int.short_xfer_ok) {
2799 xfer->error = USB_ERR_SHORT_XFER;
2800 if (xfer->flags.pipe_bof) {
2801 DPRINTFN(2, "xfer=%p: Block On Failure on "
2802 "Short Transfer on endpoint %p.\n",
2803 xfer, xfer->endpoint);
2809 * Check if we are in the middle of a
2812 if (xfer->flags_int.control_act) {
2813 DPRINTFN(5, "xfer=%p: Control transfer "
2814 "active on endpoint=%p\n", xfer, xfer->endpoint);
2820 ep = xfer->endpoint;
2823 * If the current USB transfer is completing we need to start the
2827 if (ep->endpoint_q.curr == xfer) {
2828 usb_command_wrapper(&ep->endpoint_q, NULL);
2830 if (ep->endpoint_q.curr || TAILQ_FIRST(&ep->endpoint_q.head)) {
2831 /* there is another USB transfer waiting */
2833 /* this is the last USB transfer */
2834 /* clear isochronous sync flag */
2835 xfer->endpoint->is_synced = 0;
2838 USB_BUS_UNLOCK(bus);
2843 /*------------------------------------------------------------------------*
2844 * usb_command_wrapper
2846 * This function is used to execute commands non-recursivly on an USB
2848 *------------------------------------------------------------------------*/
2850 usb_command_wrapper(struct usb_xfer_queue *pq, struct usb_xfer *xfer)
2854 * If the transfer is not already processing,
2857 if (pq->curr != xfer) {
2858 usbd_transfer_enqueue(pq, xfer);
2859 if (pq->curr != NULL) {
2860 /* something is already processing */
2861 DPRINTFN(6, "busy %p\n", pq->curr);
2866 /* Get next element in queue */
2870 if (!pq->recurse_1) {
2874 /* set both recurse flags */
2878 if (pq->curr == NULL) {
2879 xfer = TAILQ_FIRST(&pq->head);
2881 TAILQ_REMOVE(&pq->head, xfer,
2883 xfer->wait_queue = NULL;
2889 DPRINTFN(6, "cb %p (enter)\n", pq->curr);
2891 DPRINTFN(6, "cb %p (leave)\n", pq->curr);
2893 } while (!pq->recurse_2);
2895 /* clear first recurse flag */
2899 /* clear second recurse flag */
2904 /*------------------------------------------------------------------------*
2905 * usbd_ctrl_transfer_setup
2907 * This function is used to setup the default USB control endpoint
2909 *------------------------------------------------------------------------*/
2911 usbd_ctrl_transfer_setup(struct usb_device *udev)
2913 struct usb_xfer *xfer;
2915 uint8_t iface_index;
2917 /* check for root HUB */
2918 if (udev->parent_hub == NULL)
2922 xfer = udev->ctrl_xfer[0];
2924 USB_XFER_LOCK(xfer);
2926 ((xfer->address == udev->address) &&
2927 (udev->ctrl_ep_desc.wMaxPacketSize[0] ==
2928 udev->ddesc.bMaxPacketSize));
2929 if (udev->flags.usb_mode == USB_MODE_DEVICE) {
2932 * NOTE: checking "xfer->address" and
2933 * starting the USB transfer must be
2936 usbd_transfer_start(xfer);
2939 USB_XFER_UNLOCK(xfer);
2946 * All parameters are exactly the same like before.
2952 * Update wMaxPacketSize for the default control endpoint:
2954 udev->ctrl_ep_desc.wMaxPacketSize[0] =
2955 udev->ddesc.bMaxPacketSize;
2958 * Unsetup any existing USB transfer:
2960 usbd_transfer_unsetup(udev->ctrl_xfer, USB_CTRL_XFER_MAX);
2963 * Reset clear stall error counter.
2965 udev->clear_stall_errors = 0;
2968 * Try to setup a new USB transfer for the
2969 * default control endpoint:
2972 if (usbd_transfer_setup(udev, &iface_index,
2973 udev->ctrl_xfer, usb_control_ep_cfg, USB_CTRL_XFER_MAX, NULL,
2974 &udev->device_mtx)) {
2975 DPRINTFN(0, "could not setup default "
2982 /*------------------------------------------------------------------------*
2983 * usbd_clear_data_toggle - factored out code
2985 * NOTE: the intention of this function is not to reset the hardware
2987 *------------------------------------------------------------------------*/
2989 usbd_clear_stall_locked(struct usb_device *udev, struct usb_endpoint *ep)
2991 USB_BUS_LOCK_ASSERT(udev->bus, MA_OWNED);
2993 /* check that we have a valid case */
2994 if (udev->flags.usb_mode == USB_MODE_HOST &&
2995 udev->parent_hub != NULL &&
2996 udev->bus->methods->clear_stall != NULL &&
2997 ep->methods != NULL) {
2998 (udev->bus->methods->clear_stall) (udev, ep);
3002 /*------------------------------------------------------------------------*
3003 * usbd_clear_data_toggle - factored out code
3005 * NOTE: the intention of this function is not to reset the hardware
3006 * data toggle on the USB device side.
3007 *------------------------------------------------------------------------*/
3009 usbd_clear_data_toggle(struct usb_device *udev, struct usb_endpoint *ep)
3011 DPRINTFN(5, "udev=%p endpoint=%p\n", udev, ep);
3013 USB_BUS_LOCK(udev->bus);
3014 ep->toggle_next = 0;
3015 /* some hardware needs a callback to clear the data toggle */
3016 usbd_clear_stall_locked(udev, ep);
3017 USB_BUS_UNLOCK(udev->bus);
3020 /*------------------------------------------------------------------------*
3021 * usbd_clear_stall_callback - factored out clear stall callback
3024 * xfer1: Clear Stall Control Transfer
3025 * xfer2: Stalled USB Transfer
3027 * This function is NULL safe.
3033 * Clear stall config example:
3035 * static const struct usb_config my_clearstall = {
3036 * .type = UE_CONTROL,
3038 * .direction = UE_DIR_ANY,
3039 * .interval = 50, //50 milliseconds
3040 * .bufsize = sizeof(struct usb_device_request),
3041 * .timeout = 1000, //1.000 seconds
3042 * .callback = &my_clear_stall_callback, // **
3043 * .usb_mode = USB_MODE_HOST,
3046 * ** "my_clear_stall_callback" calls "usbd_clear_stall_callback"
3047 * passing the correct parameters.
3048 *------------------------------------------------------------------------*/
3050 usbd_clear_stall_callback(struct usb_xfer *xfer1,
3051 struct usb_xfer *xfer2)
3053 struct usb_device_request req;
3055 if (xfer2 == NULL) {
3056 /* looks like we are tearing down */
3057 DPRINTF("NULL input parameter\n");
3060 USB_XFER_LOCK_ASSERT(xfer1, MA_OWNED);
3061 USB_XFER_LOCK_ASSERT(xfer2, MA_OWNED);
3063 switch (USB_GET_STATE(xfer1)) {
3067 * pre-clear the data toggle to DATA0 ("umass.c" and
3068 * "ata-usb.c" depends on this)
3071 usbd_clear_data_toggle(xfer2->xroot->udev, xfer2->endpoint);
3073 /* setup a clear-stall packet */
3075 req.bmRequestType = UT_WRITE_ENDPOINT;
3076 req.bRequest = UR_CLEAR_FEATURE;
3077 USETW(req.wValue, UF_ENDPOINT_HALT);
3078 req.wIndex[0] = xfer2->endpoint->edesc->bEndpointAddress;
3080 USETW(req.wLength, 0);
3083 * "usbd_transfer_setup_sub()" will ensure that
3084 * we have sufficient room in the buffer for
3085 * the request structure!
3088 /* copy in the transfer */
3090 usbd_copy_in(xfer1->frbuffers, 0, &req, sizeof(req));
3093 xfer1->frlengths[0] = sizeof(req);
3096 usbd_transfer_submit(xfer1);
3099 case USB_ST_TRANSFERRED:
3102 default: /* Error */
3103 if (xfer1->error == USB_ERR_CANCELLED) {
3108 return (1); /* Clear Stall Finished */
3111 /*------------------------------------------------------------------------*
3112 * usbd_transfer_poll
3114 * The following function gets called from the USB keyboard driver and
3115 * UMASS when the system has paniced.
3117 * NOTE: It is currently not possible to resume normal operation on
3118 * the USB controller which has been polled, due to clearing of the
3119 * "up_dsleep" and "up_msleep" flags.
3120 *------------------------------------------------------------------------*/
3122 usbd_transfer_poll(struct usb_xfer **ppxfer, uint16_t max)
3124 struct usb_xfer *xfer;
3125 struct usb_xfer_root *xroot;
3126 struct usb_device *udev;
3127 struct usb_proc_msg *pm;
3132 for (n = 0; n != max; n++) {
3133 /* Extra checks to avoid panic */
3136 continue; /* no USB transfer */
3137 xroot = xfer->xroot;
3139 continue; /* no USB root */
3142 continue; /* no USB device */
3143 if (udev->bus == NULL)
3144 continue; /* no BUS structure */
3145 if (udev->bus->methods == NULL)
3146 continue; /* no BUS methods */
3147 if (udev->bus->methods->xfer_poll == NULL)
3148 continue; /* no poll method */
3150 /* make sure that the BUS mutex is not locked */
3152 while (mtx_owned(&xroot->udev->bus->bus_mtx) && !SCHEDULER_STOPPED()) {
3153 mtx_unlock(&xroot->udev->bus->bus_mtx);
3157 /* make sure that the transfer mutex is not locked */
3159 while (mtx_owned(xroot->xfer_mtx) && !SCHEDULER_STOPPED()) {
3160 mtx_unlock(xroot->xfer_mtx);
3164 /* Make sure cv_signal() and cv_broadcast() is not called */
3165 udev->bus->control_xfer_proc.up_msleep = 0;
3166 udev->bus->explore_proc.up_msleep = 0;
3167 udev->bus->giant_callback_proc.up_msleep = 0;
3168 udev->bus->non_giant_callback_proc.up_msleep = 0;
3170 /* poll USB hardware */
3171 (udev->bus->methods->xfer_poll) (udev->bus);
3173 USB_BUS_LOCK(xroot->bus);
3175 /* check for clear stall */
3176 if (udev->ctrl_xfer[1] != NULL) {
3178 /* poll clear stall start */
3179 pm = &udev->cs_msg[0].hdr;
3180 (pm->pm_callback) (pm);
3181 /* poll clear stall done thread */
3182 pm = &udev->ctrl_xfer[1]->
3183 xroot->done_m[0].hdr;
3184 (pm->pm_callback) (pm);
3187 /* poll done thread */
3188 pm = &xroot->done_m[0].hdr;
3189 (pm->pm_callback) (pm);
3191 USB_BUS_UNLOCK(xroot->bus);
3193 /* restore transfer mutex */
3195 mtx_lock(xroot->xfer_mtx);
3197 /* restore BUS mutex */
3199 mtx_lock(&xroot->udev->bus->bus_mtx);
3204 usbd_get_std_packet_size(struct usb_std_packet_size *ptr,
3205 uint8_t type, enum usb_dev_speed speed)
3207 static const uint16_t intr_range_max[USB_SPEED_MAX] = {
3208 [USB_SPEED_LOW] = 8,
3209 [USB_SPEED_FULL] = 64,
3210 [USB_SPEED_HIGH] = 1024,
3211 [USB_SPEED_VARIABLE] = 1024,
3212 [USB_SPEED_SUPER] = 1024,
3215 static const uint16_t isoc_range_max[USB_SPEED_MAX] = {
3216 [USB_SPEED_LOW] = 0, /* invalid */
3217 [USB_SPEED_FULL] = 1023,
3218 [USB_SPEED_HIGH] = 1024,
3219 [USB_SPEED_VARIABLE] = 3584,
3220 [USB_SPEED_SUPER] = 1024,
3223 static const uint16_t control_min[USB_SPEED_MAX] = {
3224 [USB_SPEED_LOW] = 8,
3225 [USB_SPEED_FULL] = 8,
3226 [USB_SPEED_HIGH] = 64,
3227 [USB_SPEED_VARIABLE] = 512,
3228 [USB_SPEED_SUPER] = 512,
3231 static const uint16_t bulk_min[USB_SPEED_MAX] = {
3232 [USB_SPEED_LOW] = 8,
3233 [USB_SPEED_FULL] = 8,
3234 [USB_SPEED_HIGH] = 512,
3235 [USB_SPEED_VARIABLE] = 512,
3236 [USB_SPEED_SUPER] = 1024,
3241 memset(ptr, 0, sizeof(*ptr));
3245 ptr->range.max = intr_range_max[speed];
3247 case UE_ISOCHRONOUS:
3248 ptr->range.max = isoc_range_max[speed];
3251 if (type == UE_BULK)
3252 temp = bulk_min[speed];
3253 else /* UE_CONTROL */
3254 temp = control_min[speed];
3256 /* default is fixed */
3257 ptr->fixed[0] = temp;
3258 ptr->fixed[1] = temp;
3259 ptr->fixed[2] = temp;
3260 ptr->fixed[3] = temp;
3262 if (speed == USB_SPEED_FULL) {
3263 /* multiple sizes */
3268 if ((speed == USB_SPEED_VARIABLE) &&
3269 (type == UE_BULK)) {
3270 /* multiple sizes */
3271 ptr->fixed[2] = 1024;
3272 ptr->fixed[3] = 1536;
3279 usbd_xfer_softc(struct usb_xfer *xfer)
3281 return (xfer->priv_sc);
3285 usbd_xfer_get_priv(struct usb_xfer *xfer)
3287 return (xfer->priv_fifo);
3291 usbd_xfer_set_priv(struct usb_xfer *xfer, void *ptr)
3293 xfer->priv_fifo = ptr;
3297 usbd_xfer_state(struct usb_xfer *xfer)
3299 return (xfer->usb_state);
3303 usbd_xfer_set_flag(struct usb_xfer *xfer, int flag)
3306 case USB_FORCE_SHORT_XFER:
3307 xfer->flags.force_short_xfer = 1;
3309 case USB_SHORT_XFER_OK:
3310 xfer->flags.short_xfer_ok = 1;
3312 case USB_MULTI_SHORT_OK:
3313 xfer->flags.short_frames_ok = 1;
3315 case USB_MANUAL_STATUS:
3316 xfer->flags.manual_status = 1;
3322 usbd_xfer_clr_flag(struct usb_xfer *xfer, int flag)
3325 case USB_FORCE_SHORT_XFER:
3326 xfer->flags.force_short_xfer = 0;
3328 case USB_SHORT_XFER_OK:
3329 xfer->flags.short_xfer_ok = 0;
3331 case USB_MULTI_SHORT_OK:
3332 xfer->flags.short_frames_ok = 0;
3334 case USB_MANUAL_STATUS:
3335 xfer->flags.manual_status = 0;
3341 * The following function returns in milliseconds when the isochronous
3342 * transfer was completed by the hardware. The returned value wraps
3343 * around 65536 milliseconds.
3346 usbd_xfer_get_timestamp(struct usb_xfer *xfer)
3348 return (xfer->isoc_time_complete);