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_ */ 62