usb_mbuf.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    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  *------------------------------------------------------------------------*/
   64 void   *
   65 usb_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 }

Cache object: 8782b52123d0efbff2e1dfb5de4edce7

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/dev/usb/usb_mbuf.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/usb_mbuf.c