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#include "implementation/global_implementation.h" 29 30/*------------------------------------------------------------------------* 31 * usb_alloc_mbufs - allocate mbufs to an usbd interface queue 32 * 33 * Returns: 34 * A pointer that should be passed to "free()" when the buffer(s) 35 * should be released. 36 *------------------------------------------------------------------------*/ 37void * 38usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq, 39 usb_size_t block_size, uint16_t nblocks) 40{ 41 struct usb_mbuf *m_ptr; 42 uint8_t *data_ptr; 43 void *free_ptr = NULL; 44 usb_size_t alloc_size; 45 46 /* align data */ 47 block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); 48 49 if (nblocks && block_size) { 50 alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks; 51 52 free_ptr = zalloc(alloc_size); 53 54 if (free_ptr == NULL) { 55 goto done; 56 } 57 m_ptr = free_ptr; 58 data_ptr = (void *)(m_ptr + nblocks); 59 60 while (nblocks--) { 61 62 m_ptr->cur_data_ptr = 63 m_ptr->min_data_ptr = data_ptr; 64 65 m_ptr->cur_data_len = 66 m_ptr->max_data_len = block_size; 67 68 USB_IF_ENQUEUE(ifq, m_ptr); 69 70 m_ptr++; 71 data_ptr += block_size; 72 } 73 } 74done: 75 return (free_ptr); 76} 77