1/* $FreeBSD$ */
2/*-
3 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 *
5 * Copyright (c) 2008 Hans Petter Selasky. 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#ifdef USB_GLOBAL_INCLUDE_FILE
30#include USB_GLOBAL_INCLUDE_FILE
31#else
32#include <sys/stdint.h>
33#include <sys/stddef.h>
34#include <sys/param.h>
35#include <sys/queue.h>
36#include <sys/types.h>
37#include <sys/systm.h>
38#include <sys/kernel.h>
39#include <sys/bus.h>
40#include <sys/module.h>
41#include <sys/lock.h>
42#include <sys/mutex.h>
43#include <sys/condvar.h>
44#include <sys/sysctl.h>
45#include <sys/sx.h>
46#include <sys/unistd.h>
47#include <sys/callout.h>
48#include <sys/malloc.h>
49#include <sys/priv.h>
50
51#include <dev/usb/usb.h>
52#include <dev/usb/usbdi.h>
53#include <dev/usb/usb_dev.h>
54#include <dev/usb/usb_mbuf.h>
55#endif			/* USB_GLOBAL_INCLUDE_FILE */
56
57/*------------------------------------------------------------------------*
58 *      usb_alloc_mbufs - allocate mbufs to an usbd interface queue
59 *
60 * Returns:
61 *   A pointer that should be passed to "free()" when the buffer(s)
62 *   should be released.
63 *------------------------------------------------------------------------*/
64void   *
65usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq,
66    usb_size_t block_size, uint16_t nblocks)
67{
68	struct usb_mbuf *m_ptr;
69	uint8_t *data_ptr;
70	void *free_ptr = NULL;
71	usb_size_t alloc_size;
72
73	/* align data */
74	block_size += ((-block_size) & (USB_HOST_ALIGN - 1));
75
76	if (nblocks && block_size) {
77		alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks;
78
79		free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO);
80		m_ptr = free_ptr;
81		data_ptr = (void *)(m_ptr + nblocks);
82
83		while (nblocks--) {
84			m_ptr->cur_data_ptr =
85			    m_ptr->min_data_ptr = data_ptr;
86
87			m_ptr->cur_data_len =
88			    m_ptr->max_data_len = block_size;
89
90			USB_IF_ENQUEUE(ifq, m_ptr);
91
92			m_ptr++;
93			data_ptr += block_size;
94		}
95	}
96	return (free_ptr);
97}
98