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[net80211] Add initial VHT support routines.
This is a skeleton set based on ieee80211_ht.c. It implements some IE parsing, some basic unfinished negotiation, and channel promotion/demotion. However, by itself it's not enough to do VHT - notably, the actual channel promotion for STA mode at least is done in ieee80211_ht.c as part of htinfo_update_chw(). I was .. quite amused when I found that out. I'm checking this in so others can see progress rather than one huge commit when VHT is "done" (which will likely be quite a while.)
This commit is contained in:
Adrian Chadd
parent
cb4319e3b4
commit
b6fec8d603
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=311662
469
sys/net80211/ieee80211_vht.c
Normal file
469
sys/net80211/ieee80211_vht.c
Normal file
@ -0,0 +1,469 @@
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/*-
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* Copyright (c) 2017 Adrian Chadd <adrian@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD$");
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#endif
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/*
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* IEEE 802.11ac-2013 protocol support.
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*/
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#include "opt_inet.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/endian.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_media.h>
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#include <net/ethernet.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_action.h>
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#include <net80211/ieee80211_input.h>
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#include <net80211/ieee80211_vht.h>
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/* define here, used throughout file */
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#define MS(_v, _f) (((_v) & _f) >> _f##_S)
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#define SM(_v, _f) (((_v) << _f##_S) & _f)
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#define ADDSHORT(frm, v) do { \
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frm[0] = (v) & 0xff; \
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frm[1] = (v) >> 8; \
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frm += 2; \
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} while (0)
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#define ADDWORD(frm, v) do { \
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frm[0] = (v) & 0xff; \
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frm[1] = ((v) >> 8) & 0xff; \
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frm[2] = ((v) >> 16) & 0xff; \
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frm[3] = ((v) >> 24) & 0xff; \
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frm += 4; \
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} while (0)
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/*
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* XXX TODO: handle WLAN_ACTION_VHT_OPMODE_NOTIF
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*
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* Look at mac80211/vht.c:ieee80211_vht_handle_opmode() for further details.
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*/
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static void
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ieee80211_vht_init(void)
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{
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}
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SYSINIT(wlan_vht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_vht_init, NULL);
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void
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ieee80211_vht_attach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_vht_detach(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_vht_vattach(struct ieee80211vap *vap)
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{
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struct ieee80211com *ic = vap->iv_ic;
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if (! IEEE80211_CONF_VHT(ic))
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return;
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vap->iv_vhtcaps = ic->ic_vhtcaps;
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vap->iv_vhtextcaps = ic->ic_vhtextcaps;
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/* XXX assume VHT80 support; should really check vhtcaps */
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vap->iv_flags_vht =
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IEEE80211_FVHT_VHT
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| IEEE80211_FVHT_USEVHT40
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| IEEE80211_FVHT_USEVHT80;
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/* XXX TODO: enable VHT80+80, VHT160 capabilities */
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memcpy(&vap->iv_vht_mcsinfo, &ic->ic_vht_mcsinfo,
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sizeof(struct ieee80211_vht_mcs_info));
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}
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void
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ieee80211_vht_vdetach(struct ieee80211vap *vap)
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{
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}
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#if 0
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static void
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vht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
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{
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}
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#endif
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static int
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vht_mcs_to_num(int m)
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{
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switch (m) {
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case IEEE80211_VHT_MCS_SUPPORT_0_7:
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return (7);
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case IEEE80211_VHT_MCS_SUPPORT_0_8:
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return (8);
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case IEEE80211_VHT_MCS_SUPPORT_0_9:
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return (9);
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default:
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return (0);
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}
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}
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void
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ieee80211_vht_announce(struct ieee80211com *ic)
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{
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int i, tx, rx;
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if (! IEEE80211_CONF_VHT(ic))
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return;
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/* Channel width */
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ic_printf(ic, "[VHT] Channel Widths: 20MHz, 40MHz, 80MHz");
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if (ic->ic_vhtcaps & IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
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printf(" 80+80MHz");
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if (ic->ic_vhtcaps & IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_160MHZ)
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printf(" 160MHz");
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printf("\n");
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/* Features */
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ic_printf(ic, "[VHT] Features: %b\n", ic->ic_vhtcaps,
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IEEE80211_VHTCAP_BITS);
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/* For now, just 5GHz VHT. Worry about 2GHz VHT later */
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for (i = 0; i < 7; i++) {
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/* Each stream is 2 bits */
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tx = (ic->ic_vht_mcsinfo.tx_mcs_map >> (2*i)) & 0x3;
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rx = (ic->ic_vht_mcsinfo.rx_mcs_map >> (2*i)) & 0x3;
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if (tx == 3 && rx == 3)
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continue;
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ic_printf(ic, "[VHT] NSS %d: TX MCS 0..%d, RX MCS 0..%d\n",
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i + 1,
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vht_mcs_to_num(tx),
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vht_mcs_to_num(rx));
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}
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}
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void
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ieee80211_vht_node_init(struct ieee80211_node *ni)
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{
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IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
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"%s: called", __func__);
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ni->ni_flags |= IEEE80211_NODE_VHT;
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}
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void
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ieee80211_vht_node_cleanup(struct ieee80211_node *ni)
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{
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IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
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"%s: called", __func__);
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ni->ni_flags &= ~IEEE80211_NODE_VHT;
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ni->ni_vhtcap = 0;
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bzero(&ni->ni_vht_mcsinfo, sizeof(struct ieee80211_vht_mcs_info));
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}
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/*
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* Parse an 802.11ac VHT operation IE.
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*/
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void
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ieee80211_parse_vhtopmode(struct ieee80211_node *ni, const uint8_t *ie)
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{
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/* vht operation */
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ni->ni_vht_chanwidth = ie[2];
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ni->ni_vht_chan1 = ie[3];
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ni->ni_vht_chan2 = ie[4];
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ni->ni_vht_basicmcs = le16dec(ie + 5);
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#if 0
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printf("%s: chan1=%d, chan2=%d, chanwidth=%d, basicmcs=0x%04x\n",
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__func__,
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ni->ni_vht_chan1,
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ni->ni_vht_chan2,
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ni->ni_vht_chanwidth,
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ni->ni_vht_basicmcs);
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#endif
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}
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/*
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* Parse an 802.11ac VHT capability IE.
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*/
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void
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ieee80211_parse_vhtcap(struct ieee80211_node *ni, const uint8_t *ie)
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{
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/* vht capability */
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ni->ni_vhtcap = le32dec(ie + 2);
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/* suppmcs */
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ni->ni_vht_mcsinfo.rx_mcs_map = le16dec(ie + 6);
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ni->ni_vht_mcsinfo.rx_highest = le16dec(ie + 8);
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ni->ni_vht_mcsinfo.tx_mcs_map = le16dec(ie + 10);
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ni->ni_vht_mcsinfo.tx_highest = le16dec(ie + 12);
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}
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int
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ieee80211_vht_updateparams(struct ieee80211_node *ni,
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const uint8_t *vhtcap_ie,
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const uint8_t *vhtop_ie)
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{
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//printf("%s: called\n", __func__);
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ieee80211_parse_vhtcap(ni, vhtcap_ie);
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ieee80211_parse_vhtopmode(ni, vhtop_ie);
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return (0);
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}
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void
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ieee80211_setup_vht_rates(struct ieee80211_node *ni,
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const uint8_t *vhtcap_ie,
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const uint8_t *vhtop_ie)
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{
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//printf("%s: called\n", __func__);
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/* XXX TODO */
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}
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void
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ieee80211_vht_timeout(struct ieee80211com *ic)
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{
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}
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void
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ieee80211_vht_node_join(struct ieee80211_node *ni)
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{
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IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
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"%s: called", __func__);
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}
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void
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ieee80211_vht_node_leave(struct ieee80211_node *ni)
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{
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IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
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"%s: called", __func__);
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}
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uint8_t *
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ieee80211_add_vhtcap(uint8_t *frm, struct ieee80211_node *ni)
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{
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uint32_t cap;
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memset(frm, '\0', sizeof(struct ieee80211_ie_vhtcap));
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frm[0] = IEEE80211_ELEMID_VHT_CAP;
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frm[1] = sizeof(struct ieee80211_ie_vhtcap) - 2;
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frm += 2;
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/*
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* For now, don't do any configuration.
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* Just populate the node configuration.
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* We can worry about making it configurable later.
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*/
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cap = ni->ni_vhtcap;
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/*
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* XXX TODO: any capability changes required by
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* configuration.
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*/
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/* 32-bit VHT capability */
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ADDWORD(frm, cap);
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/* suppmcs */
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ADDSHORT(frm, ni->ni_vht_mcsinfo.rx_mcs_map);
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ADDSHORT(frm, ni->ni_vht_mcsinfo.rx_highest);
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ADDSHORT(frm, ni->ni_vht_mcsinfo.tx_mcs_map);
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ADDSHORT(frm, ni->ni_vht_mcsinfo.tx_highest);
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return (frm);
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}
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static uint8_t
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ieee80211_vht_get_chwidth_ie(struct ieee80211_channel *c)
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{
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/*
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* XXX TODO: look at the node configuration as
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* well?
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*/
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if (IEEE80211_IS_CHAN_VHT160(c)) {
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return IEEE80211_VHT_CHANWIDTH_160MHZ;
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}
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if (IEEE80211_IS_CHAN_VHT80_80(c)) {
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return IEEE80211_VHT_CHANWIDTH_80P80MHZ;
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}
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if (IEEE80211_IS_CHAN_VHT80(c)) {
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return IEEE80211_VHT_CHANWIDTH_80MHZ;
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}
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if (IEEE80211_IS_CHAN_VHT40(c)) {
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return IEEE80211_VHT_CHANWIDTH_USE_HT;
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}
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if (IEEE80211_IS_CHAN_VHT20(c)) {
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return IEEE80211_VHT_CHANWIDTH_USE_HT;
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}
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/* We shouldn't get here */
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printf("%s: called on a non-VHT channel (freq=%d, flags=0x%08x\n",
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__func__,
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(int) c->ic_freq,
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c->ic_flags);
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return IEEE80211_VHT_CHANWIDTH_USE_HT;
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}
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/*
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* Note: this just uses the current channel information;
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* it doesn't use the node info after parsing.
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*/
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uint8_t *
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ieee80211_add_vhtinfo(uint8_t *frm, struct ieee80211_node *ni)
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{
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memset(frm, '\0', sizeof(struct ieee80211_ie_vht_operation));
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frm[0] = IEEE80211_ELEMID_VHT_OPMODE;
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frm[1] = sizeof(struct ieee80211_ie_vht_operation) - 2;
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frm += 2;
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/*
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* XXX if it's a station, then see if we have a node
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* channel or ANYC. If it's ANYC then assume we're
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* scanning, and announce our capabilities.
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*
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* This should set the "20/40/80/160MHz wide config";
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* the 80/80 or 160MHz wide config is done in VHTCAP.
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*
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* Other modes - just limit it to the channel.
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*/
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/* 8-bit chanwidth */
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*frm++ = ieee80211_vht_get_chwidth_ie(ni->ni_chan);
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/* 8-bit freq1 */
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*frm++ = ni->ni_chan->ic_vht_ch_freq1;
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/* 8-bit freq2 */
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*frm++ = ni->ni_chan->ic_vht_ch_freq1;
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/* 16-bit basic MCS set - just MCS0..7 for NSS=1 for now */
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ADDSHORT(frm, 0xfffc);
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return (frm);
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}
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void
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ieee80211_vht_update_cap(struct ieee80211_node *ni, const uint8_t *vhtcap_ie,
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const uint8_t *vhtop_ie)
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{
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ieee80211_parse_vhtcap(ni, vhtcap_ie);
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ieee80211_parse_vhtopmode(ni, vhtop_ie);
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}
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static struct ieee80211_channel *
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findvhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int vhtflags)
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{
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return (ieee80211_find_channel(ic, c->ic_freq,
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(c->ic_flags & ~IEEE80211_CHAN_VHT) | vhtflags));
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}
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/*
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* Handle channel promotion to VHT, similar to ieee80211_ht_adjust_channel().
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*/
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struct ieee80211_channel *
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ieee80211_vht_adjust_channel(struct ieee80211com *ic,
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struct ieee80211_channel *chan, int flags)
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{
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struct ieee80211_channel *c;
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/* First case - handle channel demotion - if VHT isn't set */
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if ((flags & IEEE80211_FVHT_VHT) == 0) {
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#if 0
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printf("%s: demoting channel %d/0x%08x\n", __func__,
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chan->ic_ieee, chan->ic_flags);
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#endif
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c = ieee80211_find_channel(ic, chan->ic_freq,
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chan->ic_flags & ~IEEE80211_CHAN_VHT);
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if (c == NULL)
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c = chan;
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#if 0
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printf("%s: .. to %d/0x%08x\n", __func__,
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c->ic_ieee, c->ic_flags);
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#endif
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return (c);
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}
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/*
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* We can upgrade to VHT - attempt to do so
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*
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* Note: we don't clear the HT flags, these are the hints
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* for HT40U/HT40D when selecting VHT40 or larger channels.
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*/
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/* Start with VHT80 */
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c = NULL;
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if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT160))
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c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80);
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if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80P80))
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c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80_80);
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if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT80))
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c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT80);
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if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
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c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40U);
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if ((c == NULL) && (flags & IEEE80211_FVHT_USEVHT40))
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c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT40D);
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/*
|
||||
* If we get here, VHT20 is always possible because we checked
|
||||
* for IEEE80211_FVHT_VHT above.
|
||||
*/
|
||||
if (c == NULL)
|
||||
c = findvhtchan(ic, chan, IEEE80211_CHAN_VHT20);
|
||||
|
||||
if (c != NULL)
|
||||
chan = c;
|
||||
|
||||
#if 0
|
||||
printf("%s: selected %d/0x%08x\n", __func__, c->ic_ieee, c->ic_flags);
|
||||
#endif
|
||||
return (chan);
|
||||
}
|
||||
63
sys/net80211/ieee80211_vht.h
Normal file
63
sys/net80211/ieee80211_vht.h
Normal file
@ -0,0 +1,63 @@
|
||||
/*-
|
||||
* Copyright (c) 2016 Adrian Chadd <adrian@FreeBSD.org>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
#ifndef _NET80211_IEEE80211_VHT_H_
|
||||
#define _NET80211_IEEE80211_VHT_H_
|
||||
|
||||
void ieee80211_vht_attach(struct ieee80211com *);
|
||||
void ieee80211_vht_detach(struct ieee80211com *);
|
||||
void ieee80211_vht_vattach(struct ieee80211vap *);
|
||||
void ieee80211_vht_vdetach(struct ieee80211vap *);
|
||||
|
||||
void ieee80211_vht_announce(struct ieee80211com *);
|
||||
|
||||
void ieee80211_vht_node_init(struct ieee80211_node *);
|
||||
void ieee80211_vht_node_cleanup(struct ieee80211_node *);
|
||||
|
||||
void ieee80211_parse_vhtopmode(struct ieee80211_node *, const uint8_t *);
|
||||
void ieee80211_parse_vhtcap(struct ieee80211_node *, const uint8_t *);
|
||||
|
||||
int ieee80211_vht_updateparams(struct ieee80211_node *,
|
||||
const uint8_t *, const uint8_t *);
|
||||
void ieee80211_setup_vht_rates(struct ieee80211_node *,
|
||||
const uint8_t *, const uint8_t *);
|
||||
|
||||
void ieee80211_vht_timeout(struct ieee80211com *ic);
|
||||
|
||||
void ieee80211_vht_node_join(struct ieee80211_node *ni);
|
||||
void ieee80211_vht_node_leave(struct ieee80211_node *ni);
|
||||
|
||||
uint8_t * ieee80211_add_vhtcap(uint8_t *frm, struct ieee80211_node *);
|
||||
uint8_t * ieee80211_add_vhtinfo(uint8_t *frm, struct ieee80211_node *);
|
||||
|
||||
void ieee80211_vht_update_cap(struct ieee80211_node *,
|
||||
const uint8_t *, const uint8_t *);
|
||||
|
||||
struct ieee80211_channel *
|
||||
ieee80211_vht_adjust_channel(struct ieee80211com *,
|
||||
struct ieee80211_channel *, int);
|
||||
|
||||
#endif /* _NET80211_IEEE80211_VHT_H_ */
|
||||
Loading…
Reference in New Issue
Block a user