usb_mbuf.h

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: releng/11.2/sys/dev/usb/usb_mbuf.h 331722 2018-03-29 02:50:57Z eadler $ */
    2 /*-
    3  * Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #ifndef _USB_MBUF_H_
   28 #define _USB_MBUF_H_
   29 
   30 /*
   31  * The following structure defines a minimum re-implementation of the
   32  * mbuf system in the kernel.
   33  */
   34 struct usb_mbuf {
   35         uint8_t *cur_data_ptr;
   36         uint8_t *min_data_ptr;
   37         struct usb_mbuf *usb_nextpkt;
   38         struct usb_mbuf *usb_next;
   39 
   40         usb_size_t cur_data_len;
   41         usb_size_t max_data_len;
   42         uint8_t last_packet:1;
   43         uint8_t unused:7;
   44 };
   45 
   46 #define USB_IF_ENQUEUE(ifq, m) do {             \
   47     (m)->usb_nextpkt = NULL;                    \
   48     if ((ifq)->ifq_tail == NULL)                \
   49         (ifq)->ifq_head = (m);                  \
   50     else                                        \
   51         (ifq)->ifq_tail->usb_nextpkt = (m);     \
   52     (ifq)->ifq_tail = (m);                      \
   53     (ifq)->ifq_len++;                           \
   54   } while (0)
   55 
   56 #define USB_IF_DEQUEUE(ifq, m) do {                             \
   57     (m) = (ifq)->ifq_head;                                      \
   58     if (m) {                                                    \
   59         if (((ifq)->ifq_head = (m)->usb_nextpkt) == NULL) {     \
   60              (ifq)->ifq_tail = NULL;                            \
   61         }                                                       \
   62         (m)->usb_nextpkt = NULL;                                \
   63         (ifq)->ifq_len--;                                       \
   64     }                                                           \
   65   } while (0)
   66 
   67 #define USB_IF_PREPEND(ifq, m) do {             \
   68       (m)->usb_nextpkt = (ifq)->ifq_head;       \
   69       if ((ifq)->ifq_tail == NULL) {            \
   70           (ifq)->ifq_tail = (m);                \
   71       }                                         \
   72       (ifq)->ifq_head = (m);                    \
   73       (ifq)->ifq_len++;                         \
   74   } while (0)
   75 
   76 #define USB_IF_QFULL(ifq)   ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
   77 #define USB_IF_QLEN(ifq)    ((ifq)->ifq_len)
   78 #define USB_IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
   79 
   80 #define USB_MBUF_RESET(m) do {                  \
   81     (m)->cur_data_ptr = (m)->min_data_ptr;      \
   82     (m)->cur_data_len = (m)->max_data_len;      \
   83     (m)->last_packet = 0;                       \
   84   } while (0)
   85 
   86 /* prototypes */
   87 void   *usb_alloc_mbufs(struct malloc_type *type, struct usb_ifqueue *ifq,
   88             usb_size_t block_size, uint16_t nblocks);
   89 
   90 #endif                                  /* _USB_MBUF_H_ */

Cache object: 54c1fa898270f88ee726bc7ceea4f29d

[ 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.h

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