xref: /freebsd/usr.sbin/bhyve/usb_emul.c (revision a4e5e0106ac7145f56eb39a691e302cabb4635be)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2014 Nahanni Systems Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/types.h>
30 #include <sys/queue.h>
31 
32 #include <assert.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <pthread.h>
37 
38 #include "usb_emul.h"
39 
40 SET_DECLARE(usb_emu_set, struct usb_devemu);
41 
42 struct usb_devemu *
43 usb_emu_finddev(const char *name)
44 {
45 	struct usb_devemu **udpp, *udp;
46 
47 	SET_FOREACH(udpp, usb_emu_set) {
48 		udp = *udpp;
49 		if (!strcmp(udp->ue_emu, name))
50 			return (udp);
51 	}
52 
53 	return (NULL);
54 }
55 
56 struct usb_data_xfer_block *
57 usb_data_xfer_append(struct usb_data_xfer *xfer, void *buf, int blen,
58                      void *hci_data, int ccs)
59 {
60 	struct usb_data_xfer_block *xb;
61 
62 	if (xfer->ndata >= USB_MAX_XFER_BLOCKS)
63 		return (NULL);
64 
65 	xb = &xfer->data[xfer->tail];
66 	xb->buf = buf;
67 	xb->blen = blen;
68 	xb->hci_data = hci_data;
69 	xb->ccs = ccs;
70 	xb->processed = 0;
71 	xb->bdone = 0;
72 	xfer->ndata++;
73 	xfer->tail = (xfer->tail + 1) % USB_MAX_XFER_BLOCKS;
74 	return (xb);
75 }
76