1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #ifdef USB_GLOBAL_INCLUDE_FILE
29 #include USB_GLOBAL_INCLUDE_FILE
30 #else
31 #include <sys/stdint.h>
32 #include <sys/stddef.h>
33 #include <sys/param.h>
34 #include <sys/queue.h>
35 #include <sys/types.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/bus.h>
39 #include <sys/module.h>
40 #include <sys/lock.h>
41 #include <sys/mutex.h>
42 #include <sys/condvar.h>
43 #include <sys/sysctl.h>
44 #include <sys/sx.h>
45 #include <sys/unistd.h>
46 #include <sys/callout.h>
47 #include <sys/malloc.h>
48 #include <sys/priv.h>
49
50 #include <dev/usb/usb.h>
51 #include <dev/usb/usbdi.h>
52 #include <dev/usb/usb_dev.h>
53 #include <dev/usb/usb_mbuf.h>
54 #endif /* USB_GLOBAL_INCLUDE_FILE */
55
56 /*------------------------------------------------------------------------*
57 * usb_alloc_mbufs - allocate mbufs to an usbd interface queue
58 *
59 * Returns:
60 * A pointer that should be passed to "free()" when the buffer(s)
61 * should be released.
62 *------------------------------------------------------------------------*/
63 void *
usb_alloc_mbufs(struct malloc_type * type,struct usb_ifqueue * ifq,usb_size_t block_size,uint16_t nblocks)64 usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq,
65 usb_size_t block_size, uint16_t nblocks)
66 {
67 struct usb_mbuf *m_ptr;
68 uint8_t *data_ptr;
69 void *free_ptr = NULL;
70 usb_size_t alloc_size;
71
72 /* align data */
73 block_size += ((-block_size) & (USB_HOST_ALIGN - 1));
74
75 if (nblocks && block_size) {
76 alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks;
77
78 free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO);
79 m_ptr = free_ptr;
80 data_ptr = (void *)(m_ptr + nblocks);
81
82 while (nblocks--) {
83 m_ptr->cur_data_ptr =
84 m_ptr->min_data_ptr = data_ptr;
85
86 m_ptr->cur_data_len =
87 m_ptr->max_data_len = block_size;
88
89 USB_IF_ENQUEUE(ifq, m_ptr);
90
91 m_ptr++;
92 data_ptr += block_size;
93 }
94 }
95 return (free_ptr);
96 }
97