1184610Salfred/* $FreeBSD: releng/10.2/sys/dev/usb/usb_mbuf.c 246122 2013-01-30 15:26:04Z hselasky $ */ 2184610Salfred/*- 3184610Salfred * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. 4184610Salfred * 5184610Salfred * Redistribution and use in source and binary forms, with or without 6184610Salfred * modification, are permitted provided that the following conditions 7184610Salfred * are met: 8184610Salfred * 1. Redistributions of source code must retain the above copyright 9184610Salfred * notice, this list of conditions and the following disclaimer. 10184610Salfred * 2. Redistributions in binary form must reproduce the above copyright 11184610Salfred * notice, this list of conditions and the following disclaimer in the 12184610Salfred * documentation and/or other materials provided with the distribution. 13184610Salfred * 14184610Salfred * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15184610Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16184610Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17184610Salfred * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18184610Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19184610Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20184610Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21184610Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22184610Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23184610Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24184610Salfred * SUCH DAMAGE. 25184610Salfred */ 26184610Salfred 27246122Shselasky#ifdef USB_GLOBAL_INCLUDE_FILE 28246122Shselasky#include USB_GLOBAL_INCLUDE_FILE 29246122Shselasky#else 30194677Sthompsa#include <sys/stdint.h> 31194677Sthompsa#include <sys/stddef.h> 32194677Sthompsa#include <sys/param.h> 33194677Sthompsa#include <sys/queue.h> 34194677Sthompsa#include <sys/types.h> 35194677Sthompsa#include <sys/systm.h> 36194677Sthompsa#include <sys/kernel.h> 37194677Sthompsa#include <sys/bus.h> 38194677Sthompsa#include <sys/module.h> 39194677Sthompsa#include <sys/lock.h> 40194677Sthompsa#include <sys/mutex.h> 41194677Sthompsa#include <sys/condvar.h> 42194677Sthompsa#include <sys/sysctl.h> 43194677Sthompsa#include <sys/sx.h> 44194677Sthompsa#include <sys/unistd.h> 45194677Sthompsa#include <sys/callout.h> 46194677Sthompsa#include <sys/malloc.h> 47194677Sthompsa#include <sys/priv.h> 48194677Sthompsa 49194677Sthompsa#include <dev/usb/usb.h> 50194677Sthompsa#include <dev/usb/usbdi.h> 51194677Sthompsa#include <dev/usb/usb_dev.h> 52188942Sthompsa#include <dev/usb/usb_mbuf.h> 53246122Shselasky#endif /* USB_GLOBAL_INCLUDE_FILE */ 54184610Salfred 55184610Salfred/*------------------------------------------------------------------------* 56194228Sthompsa * usb_alloc_mbufs - allocate mbufs to an usbd interface queue 57184610Salfred * 58184610Salfred * Returns: 59184610Salfred * A pointer that should be passed to "free()" when the buffer(s) 60184610Salfred * should be released. 61184610Salfred *------------------------------------------------------------------------*/ 62184610Salfredvoid * 63194228Sthompsausb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq, 64193074Sthompsa usb_size_t block_size, uint16_t nblocks) 65184610Salfred{ 66192984Sthompsa struct usb_mbuf *m_ptr; 67184610Salfred uint8_t *data_ptr; 68184610Salfred void *free_ptr = NULL; 69193074Sthompsa usb_size_t alloc_size; 70184610Salfred 71184610Salfred /* align data */ 72184610Salfred block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); 73184610Salfred 74184610Salfred if (nblocks && block_size) { 75184610Salfred 76192984Sthompsa alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks; 77184610Salfred 78184610Salfred free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO); 79184610Salfred 80184610Salfred if (free_ptr == NULL) { 81184610Salfred goto done; 82184610Salfred } 83184610Salfred m_ptr = free_ptr; 84184610Salfred data_ptr = (void *)(m_ptr + nblocks); 85184610Salfred 86184610Salfred while (nblocks--) { 87184610Salfred 88184610Salfred m_ptr->cur_data_ptr = 89184610Salfred m_ptr->min_data_ptr = data_ptr; 90184610Salfred 91184610Salfred m_ptr->cur_data_len = 92184610Salfred m_ptr->max_data_len = block_size; 93184610Salfred 94184610Salfred USB_IF_ENQUEUE(ifq, m_ptr); 95184610Salfred 96184610Salfred m_ptr++; 97184610Salfred data_ptr += block_size; 98184610Salfred } 99184610Salfred } 100184610Salfreddone: 101184610Salfred return (free_ptr); 102184610Salfred} 103