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 <dev/usb/usb_core.h>
28 #include <dev/usb/usb_mbuf.h>
30 /*------------------------------------------------------------------------*
31 * usb2_alloc_mbufs - allocate mbufs to an usbd interface queue
34 * A pointer that should be passed to "free()" when the buffer(s)
36 *------------------------------------------------------------------------*/
38 usb2_alloc_mbufs(struct malloc_type *type, struct usb2_ifqueue *ifq,
39 uint32_t block_size, uint16_t nblocks)
41 struct usb2_mbuf *m_ptr;
43 void *free_ptr = NULL;
47 block_size += ((-block_size) & (USB_HOST_ALIGN - 1));
49 if (nblocks && block_size) {
51 alloc_size = (block_size + sizeof(struct usb2_mbuf)) * nblocks;
53 free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO);
55 if (free_ptr == NULL) {
59 data_ptr = (void *)(m_ptr + nblocks);
64 m_ptr->min_data_ptr = data_ptr;
67 m_ptr->max_data_len = block_size;
69 USB_IF_ENQUEUE(ifq, m_ptr);
72 data_ptr += block_size;