Current Path : /sys/dev/usb/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/usb/usb_mbuf.c |
/* $FreeBSD: release/9.1.0/sys/dev/usb/usb_mbuf.c 217265 2011-01-11 13:59:06Z jhb $ */ /*- * Copyright (c) 2008 Hans Petter Selasky. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/stdint.h> #include <sys/stddef.h> #include <sys/param.h> #include <sys/queue.h> #include <sys/types.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/bus.h> #include <sys/module.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/condvar.h> #include <sys/sysctl.h> #include <sys/sx.h> #include <sys/unistd.h> #include <sys/callout.h> #include <sys/malloc.h> #include <sys/priv.h> #include <dev/usb/usb.h> #include <dev/usb/usbdi.h> #include <dev/usb/usb_dev.h> #include <dev/usb/usb_mbuf.h> /*------------------------------------------------------------------------* * usb_alloc_mbufs - allocate mbufs to an usbd interface queue * * Returns: * A pointer that should be passed to "free()" when the buffer(s) * should be released. *------------------------------------------------------------------------*/ void * usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq, usb_size_t block_size, uint16_t nblocks) { struct usb_mbuf *m_ptr; uint8_t *data_ptr; void *free_ptr = NULL; usb_size_t alloc_size; /* align data */ block_size += ((-block_size) & (USB_HOST_ALIGN - 1)); if (nblocks && block_size) { alloc_size = (block_size + sizeof(struct usb_mbuf)) * nblocks; free_ptr = malloc(alloc_size, type, M_WAITOK | M_ZERO); if (free_ptr == NULL) { goto done; } m_ptr = free_ptr; data_ptr = (void *)(m_ptr + nblocks); while (nblocks--) { m_ptr->cur_data_ptr = m_ptr->min_data_ptr = data_ptr; m_ptr->cur_data_len = m_ptr->max_data_len = block_size; USB_IF_ENQUEUE(ifq, m_ptr); m_ptr++; data_ptr += block_size; } } done: return (free_ptr); }