2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/netproto/802_11/wlan/ieee80211_ratectl.c,v 1.5 2008/01/15 09:01:13 sephe Exp $
37 #include <sys/param.h>
38 #include <sys/kernel.h>
41 #include <net/if_media.h>
42 #include <net/if_arp.h>
44 #include <netproto/802_11/ieee80211_var.h>
46 static const struct ieee80211_ratectl *ratectls[IEEE80211_RATECTL_MAX] = {
47 [IEEE80211_RATECTL_NONE] = &ieee80211_ratectl_none
50 static const char *ratectl_modname[IEEE80211_RATECTL_MAX] = {
51 [IEEE80211_RATECTL_ONOE] = "wlan_ratectl_onoe",
52 [IEEE80211_RATECTL_AMRR] = "wlan_ratectl_amrr",
53 [IEEE80211_RATECTL_SAMPLE] = "wlan_ratectl_sample"
57 ieee80211_ratectl_attach(struct ieee80211com *ic)
59 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
60 u_int cur_ratectl = rc_st->rc_st_ratectl;
62 rc_st->rc_st_ratectl_cap |= IEEE80211_RATECTL_CAP_NONE;
63 rc_st->rc_st_ratectl = IEEE80211_RATECTL_NONE;
65 ieee80211_ratectl_change(ic, cur_ratectl);
69 ieee80211_ratectl_detach(struct ieee80211com *ic)
71 ieee80211_ratectl_change(ic, IEEE80211_RATECTL_NONE);
75 ieee80211_ratectl_register(const struct ieee80211_ratectl *rc)
80 if (rc->rc_ratectl >= IEEE80211_RATECTL_MAX) {
81 kprintf("%s: rate control %s has an invalid index %d\n",
82 __func__, rc->rc_name, rc->rc_ratectl);
85 if (ratectls[rc->rc_ratectl] != NULL &&
86 ratectls[rc->rc_ratectl] != rc) {
87 kprintf("%s: rate control index %d is registered by %s\n",
88 __func__, rc->rc_ratectl,
89 ratectls[rc->rc_ratectl]->rc_name);
93 ratectls[rc->rc_ratectl] = rc;
97 ieee80211_ratectl_unregister(const struct ieee80211_ratectl *rc)
102 if (rc->rc_ratectl >= IEEE80211_RATECTL_MAX) {
103 kprintf("%s: rate control %s has an invalid index %d\n",
104 __func__, rc->rc_name, rc->rc_ratectl);
107 if (ratectls[rc->rc_ratectl] != NULL &&
108 ratectls[rc->rc_ratectl] != rc) {
109 kprintf("%s: rate control index %d is registered by %s\n",
110 __func__, rc->rc_ratectl,
111 ratectls[rc->rc_ratectl]->rc_name);
116 * Indiviual rate control module MUST maintain reference count itself.
118 ratectls[rc->rc_ratectl] = NULL;
122 ieee80211_ratectl_change(struct ieee80211com *ic, u_int rc_idx)
124 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
125 const struct ieee80211_ratectl *rc, *rc_old;
127 if (rc_idx == rc_st->rc_st_ratectl) {
128 /* Nothing need to be changed */
132 if ((IEEE80211_RATECTL_CAP(rc_idx) & rc_st->rc_st_ratectl_cap) == 0) {
133 /* We are not capable to do requested rate control */
137 rc = ratectls[rc_idx];
139 /* Try load the rate control module */
140 ieee80211_load_module(ratectl_modname[rc_idx]);
143 * If rate control module loaded it should immediately
144 * call ieee80211_ratectl_register() which will fill in
145 * the entry in the 'ratectls' array.
147 rc = ratectls[rc_idx];
149 kprintf("%s: can't load requested rate control module",
155 /* Detach old rate control */
156 rc_old = ratectls[rc_st->rc_st_ratectl];
157 rc_old->rc_detach(rc_st->rc_st_ctx);
159 /* Attach new rate control */
160 rc_st->rc_st_ratectl = rc_idx;
161 rc_st->rc_st_ctx = rc->rc_attach(ic);
167 ieee80211_ratectl_data_alloc(struct ieee80211_node *ni)
169 struct ieee80211com *ic = ni->ni_ic;
170 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
171 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
173 rc->rc_data_alloc(ni);
177 ieee80211_ratectl_data_dup(const struct ieee80211_node *oni,
178 struct ieee80211_node *nni)
180 struct ieee80211com *ic = oni->ni_ic;
181 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
182 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
184 rc->rc_data_dup(oni, nni);
188 ieee80211_ratectl_data_free(struct ieee80211_node *ni)
190 struct ieee80211com *ic = ni->ni_ic;
191 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
192 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
194 rc->rc_data_free(ni);
198 ieee80211_ratectl_newstate(struct ieee80211com *ic, enum ieee80211_state state)
200 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
201 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
203 rc->rc_newstate(rc_st->rc_st_ctx, state);
207 ieee80211_ratectl_tx_complete(struct ieee80211_node *ni, int frame_len,
208 const struct ieee80211_ratectl_res res[],
209 int res_len, int data_retries, int rts_retries,
212 struct ieee80211com *ic = ni->ni_ic;
213 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
214 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
216 rc->rc_tx_complete(rc_st->rc_st_ctx, ni, frame_len, res, res_len,
217 data_retries, rts_retries, is_fail);
221 ieee80211_ratectl_newassoc(struct ieee80211_node *ni, int is_new)
223 struct ieee80211com *ic = ni->ni_ic;
224 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
225 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
227 rc->rc_newassoc(rc_st->rc_st_ctx, ni, is_new);
231 ieee80211_ratectl_findrate(struct ieee80211_node *ni, int frame_len,
232 int rateidx[], int rateidx_len)
234 struct ieee80211com *ic = ni->ni_ic;
235 struct ieee80211_ratectl_state *rc_st = &ic->ic_ratectl;
236 const struct ieee80211_ratectl *rc = ratectls[rc_st->rc_st_ratectl];
238 KKASSERT(rateidx_len > 0);
240 return rc->rc_findrate(rc_st->rc_st_ctx, ni, frame_len,
241 rateidx, rateidx_len);