1 /*- 2 * Copyright (c) 2010 Rui Paulo <rpaulo@FreeBSD.org> 3 * 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 ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/systm.h> 32 #include <sys/socket.h> 33 34 #include <net/if.h> 35 #include <net/if_media.h> 36 37 #include <net80211/ieee80211_var.h> 38 #include <net80211/ieee80211_ratectl.h> 39 40 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX]; 41 42 static const char *ratectl_modnames[IEEE80211_RATECTL_MAX] = { 43 [IEEE80211_RATECTL_AMRR] = "wlan_amrr", 44 [IEEE80211_RATECTL_RSSADAPT] = "wlan_rssadapt", 45 [IEEE80211_RATECTL_ONOE] = "wlan_onoe", 46 [IEEE80211_RATECTL_SAMPLE] = "wlan_sample", 47 [IEEE80211_RATECTL_NONE] = "wlan_none", 48 }; 49 50 MALLOC_DEFINE(M_80211_RATECTL, "80211ratectl", "802.11 rate control"); 51 52 53 #if defined(__HAIKU__) 54 /* 55 * Setup ratectl support for a device/shared instance. 56 */ 57 void 58 ieee80211_ratectl_attach(struct ieee80211com *ic) 59 { 60 ieee80211_ratectl_none_load(); 61 ieee80211_ratectl_amrr_load(); 62 ieee80211_ratectl_rssadapt_load(); 63 } 64 65 /* 66 * Teardown ratectl support. 67 */ 68 void 69 ieee80211_ratectl_detach(struct ieee80211com *ic) 70 { 71 ieee80211_ratectl_none_unload(); 72 ieee80211_ratectl_amrr_unload(); 73 ieee80211_ratectl_rssadapt_unload(); 74 } 75 #endif 76 77 void 78 ieee80211_ratectl_register(int type, const struct ieee80211_ratectl *ratectl) 79 { 80 if (type >= IEEE80211_RATECTL_MAX) 81 return; 82 ratectls[type] = ratectl; 83 } 84 85 void 86 ieee80211_ratectl_unregister(int type) 87 { 88 if (type >= IEEE80211_RATECTL_MAX) 89 return; 90 ratectls[type] = NULL; 91 } 92 93 void 94 ieee80211_ratectl_init(struct ieee80211vap *vap) 95 { 96 if (vap->iv_rate == ratectls[IEEE80211_RATECTL_NONE]) 97 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_AMRR); 98 vap->iv_rate->ir_init(vap); 99 } 100 101 void 102 ieee80211_ratectl_set(struct ieee80211vap *vap, int type) 103 { 104 if (type >= IEEE80211_RATECTL_MAX) 105 return; 106 if (ratectls[type] == NULL) { 107 ieee80211_load_module(ratectl_modnames[type]); 108 if (ratectls[type] == NULL) { 109 IEEE80211_DPRINTF(vap, IEEE80211_MSG_RATECTL, 110 "%s: unable to load algo %u, module %s\n", 111 __func__, type, ratectl_modnames[type]); 112 vap->iv_rate = ratectls[IEEE80211_RATECTL_NONE]; 113 return; 114 } 115 } 116 vap->iv_rate = ratectls[type]; 117 } 118