sys/net/if_ringmap.h

   1 /*
   2  * Copyright (c) 2017 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Sepherosa Ziehau <sepherosa@gmail.com>
   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  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #ifndef _NET_IF_RINGMAP_H_
  36 #define _NET_IF_RINGMAP_H_
  37
  38 #ifndef _KERNEL
  39 #error "kernel only header file"
  40 #endif
  41
  42 #include <sys/bus.h>
  43 #include <sys/sysctl.h>
  44
  45 struct if_ringmap;
  46
  47 struct if_ringmap *if_ringmap_alloc(device_t dev, int cnt, int cnt_max);
  48 /* power-of-2 ring count */
  49 struct if_ringmap *if_ringmap_alloc2(device_t dev, int cnt, int cnt_max);
  50 void    if_ringmap_free(struct if_ringmap *rm);
  51 void    if_ringmap_match(device_t dev, struct if_ringmap *rm0,
  52             struct if_ringmap *rm1);
  53 void    if_ringmap_align(device_t dev, struct if_ringmap *rm0,
  54             struct if_ringmap *rm1);
  55 int     if_ringmap_count(const struct if_ringmap *rm);
  56 int     if_ringmap_cpumap(const struct if_ringmap *rm, int ring);
  57 void    if_ringmap_rdrtable(const struct if_ringmap *rm, int table[],
  58             int table_nent);
  59 int     if_ringmap_cpumap_sysctl(SYSCTL_HANDLER_ARGS);
  60
  61 #endif  /* !_NET_IF_RINGMAP_H_ */