[net80211] initial, somewhat incomplete VHT channel setup code and attach path.
This sets up: * vht capabilities in vaps; * calls vht_announce to announce VHT capabilities if any; * sets up vht20, vht40 and vht80 channels, assuming the regulatory code does the right thing with 80MHz available ranges; * adds support to the ieee80211_add_channel_list_5ghz() code to populate VHT channels, as this is the API my ath10k driver is using; * add support for the freq1/freq2 field population and lookup that VHT channels require. The VHT80 code assumes that the regulatory domain already has limited VHT80 bands to, well, 80MHz wide chunks.
This commit is contained in:
Adrian Chadd
parent
1296e1b0b7
commit
67f4aa3878
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=312014
@ -54,6 +54,7 @@ __FBSDID("$FreeBSD$");
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#include <net80211/ieee80211_superg.h>
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#endif
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#include <net80211/ieee80211_ratectl.h>
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#include <net80211/ieee80211_vht.h>
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#include <net/bpf.h>
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@ -119,6 +120,8 @@ static const struct ieee80211_rateset ieee80211_rateset_11g =
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{ 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
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#undef B
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static int set_vht_extchan(struct ieee80211_channel *c);
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/*
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* Fill in 802.11 available channel set, mark
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* all available channels as active, and pick
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@ -150,10 +153,23 @@ ieee80211_chan_init(struct ieee80211com *ic)
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*/
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if (c->ic_ieee == 0)
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c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
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/*
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* Setup the HT40/VHT40 upper/lower bits.
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* The VHT80 math is done elsewhere.
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*/
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if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
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c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
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(IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
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c->ic_flags);
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/* Update VHT math */
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/*
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* XXX VHT again, note that this assumes VHT80 channels
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* are legit already
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*/
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set_vht_extchan(c);
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/* default max tx power to max regulatory */
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if (c->ic_maxpower == 0)
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c->ic_maxpower = 2*c->ic_maxregpower;
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@ -343,6 +359,7 @@ ieee80211_ifattach(struct ieee80211com *ic)
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ieee80211_superg_attach(ic);
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#endif
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ieee80211_ht_attach(ic);
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ieee80211_vht_attach(ic);
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ieee80211_scan_attach(ic);
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ieee80211_regdomain_attach(ic);
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ieee80211_dfs_attach(ic);
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@ -386,6 +403,7 @@ ieee80211_ifdetach(struct ieee80211com *ic)
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#ifdef IEEE80211_SUPPORT_SUPERG
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ieee80211_superg_detach(ic);
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#endif
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ieee80211_vht_detach(ic);
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ieee80211_ht_detach(ic);
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/* NB: must be called before ieee80211_node_detach */
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ieee80211_proto_detach(ic);
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@ -515,8 +533,15 @@ ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
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vap->iv_flags_ext = ic->ic_flags_ext;
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vap->iv_flags_ven = ic->ic_flags_ven;
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vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
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/* 11n capabilities - XXX methodize */
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vap->iv_htcaps = ic->ic_htcaps;
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vap->iv_htextcaps = ic->ic_htextcaps;
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/* 11ac capabilities - XXX methodize */
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vap->iv_vhtcaps = ic->ic_vhtcaps;
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vap->iv_vhtextcaps = ic->ic_vhtextcaps;
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vap->iv_opmode = opmode;
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vap->iv_caps |= ieee80211_opcap[opmode];
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IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
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@ -601,6 +626,7 @@ ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
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ieee80211_superg_vattach(vap);
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#endif
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ieee80211_ht_vattach(vap);
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ieee80211_vht_vattach(vap);
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ieee80211_scan_vattach(vap);
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ieee80211_regdomain_vattach(vap);
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ieee80211_radiotap_vattach(vap);
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@ -737,6 +763,7 @@ ieee80211_vap_detach(struct ieee80211vap *vap)
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#ifdef IEEE80211_SUPPORT_SUPERG
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ieee80211_superg_vdetach(vap);
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#endif
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ieee80211_vht_vdetach(vap);
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ieee80211_ht_vdetach(vap);
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/* NB: must be before ieee80211_node_vdetach */
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ieee80211_proto_vdetach(vap);
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@ -1081,6 +1108,110 @@ set_extchan(struct ieee80211_channel *c)
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c->ic_extieee = 0;
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}
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/*
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* Populate the freq1/freq2 fields as appropriate for VHT channels.
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*
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* This for now uses a hard-coded list of 80MHz wide channels.
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*
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* For HT20/HT40, freq1 just is the centre frequency of the 40MHz
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* wide channel we've already decided upon.
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*
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* For VHT80 and VHT160, there are only a small number of fixed
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* 80/160MHz wide channels, so we just use those.
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*
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* This is all likely very very wrong - both the regulatory code
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* and this code needs to ensure that all four channels are
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* available and valid before the VHT80 (and eight for VHT160) channel
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* is created.
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*/
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struct vht_chan_range {
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uint16_t freq_start;
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uint16_t freq_end;
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};
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struct vht_chan_range vht80_chan_ranges[] = {
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{ 5170, 5250 },
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{ 5250, 5330 },
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{ 5490, 5570 },
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{ 5570, 5650 },
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{ 5650, 5730 },
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{ 5735, 5815 },
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{ 0, 0, }
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};
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static int
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set_vht_extchan(struct ieee80211_channel *c)
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{
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int i;
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if (! IEEE80211_IS_CHAN_VHT(c)) {
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return (0);
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}
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if (IEEE80211_IS_CHAN_VHT20(c)) {
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c->ic_vht_ch_freq1 = c->ic_ieee;
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return (1);
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}
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if (IEEE80211_IS_CHAN_VHT40(c)) {
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if (IEEE80211_IS_CHAN_HT40U(c))
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c->ic_vht_ch_freq1 = c->ic_ieee + 2;
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else if (IEEE80211_IS_CHAN_HT40D(c))
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c->ic_vht_ch_freq1 = c->ic_ieee - 2;
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else
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return (0);
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return (1);
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}
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if (IEEE80211_IS_CHAN_VHT80(c)) {
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for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
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if (c->ic_freq >= vht80_chan_ranges[i].freq_start &&
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c->ic_freq < vht80_chan_ranges[i].freq_end) {
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int midpoint;
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midpoint = vht80_chan_ranges[i].freq_start + 40;
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c->ic_vht_ch_freq1 =
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ieee80211_mhz2ieee(midpoint, c->ic_flags);
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c->ic_vht_ch_freq2 = 0;
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#if 0
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printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
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__func__, c->ic_ieee, c->ic_freq, midpoint,
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c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
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#endif
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return (1);
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}
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}
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return (0);
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}
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printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n",
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__func__,
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c->ic_ieee,
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c->ic_flags);
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return (0);
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}
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/*
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* Return whether the current channel could possibly be a part of
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* a VHT80 channel.
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*
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* This doesn't check that the whole range is in the allowed list
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* according to regulatory.
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*/
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static int
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is_vht80_valid_freq(uint16_t freq)
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{
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int i;
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for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
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if (freq >= vht80_chan_ranges[i].freq_start &&
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freq < vht80_chan_ranges[i].freq_end)
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return (1);
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}
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return (0);
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}
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static int
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addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
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uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
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@ -1090,13 +1221,25 @@ addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
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if (*nchans >= maxchans)
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return (ENOBUFS);
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#if 0
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printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n",
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__func__,
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*nchans,
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ieee,
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freq,
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flags);
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#endif
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c = &chans[(*nchans)++];
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c->ic_ieee = ieee;
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c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
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c->ic_maxregpower = maxregpower;
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c->ic_maxpower = 2 * maxregpower;
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c->ic_flags = flags;
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c->ic_vht_ch_freq1 = 0;
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c->ic_vht_ch_freq2 = 0;
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set_extchan(c);
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set_vht_extchan(c);
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return (0);
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}
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@ -1112,14 +1255,27 @@ copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
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if (*nchans >= maxchans)
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return (ENOBUFS);
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#if 0
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printf("%s: %d: flags=0x%08x\n",
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__func__,
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*nchans,
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flags);
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#endif
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c = &chans[(*nchans)++];
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c[0] = c[-1];
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c->ic_flags = flags;
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c->ic_vht_ch_freq1 = 0;
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c->ic_vht_ch_freq2 = 0;
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set_extchan(c);
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set_vht_extchan(c);
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return (0);
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}
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/*
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* XXX VHT-2GHz
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*/
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static void
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getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40)
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{
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@ -1140,35 +1296,73 @@ getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40)
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}
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static void
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getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40)
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getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
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{
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int nmodes;
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/*
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* the addchan_list function seems to expect the flags array to
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* be in channel width order, so the VHT bits are interspersed
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* as appropriate to maintain said order.
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*
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* It also assumes HT40U is before HT40D.
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*/
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nmodes = 0;
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/* 20MHz */
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if (isset(bands, IEEE80211_MODE_11A))
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flags[nmodes++] = IEEE80211_CHAN_A;
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if (isset(bands, IEEE80211_MODE_11NA))
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
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if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 |
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IEEE80211_CHAN_VHT20;
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/* 40MHz */
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if (ht40) {
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
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}
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if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U
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| IEEE80211_CHAN_VHT40U;
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}
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if (ht40) {
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
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}
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if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
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flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D
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| IEEE80211_CHAN_VHT40D;
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}
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/* 80MHz */
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if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
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flags[nmodes++] = IEEE80211_CHAN_A |
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IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80;
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flags[nmodes++] = IEEE80211_CHAN_A |
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IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80;
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}
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}
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/* XXX VHT80+80 */
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/* XXX VHT160 */
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flags[nmodes] = 0;
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}
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static void
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getflags(const uint8_t bands[], uint32_t flags[], int ht40)
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getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
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{
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flags[0] = 0;
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if (isset(bands, IEEE80211_MODE_11A) ||
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isset(bands, IEEE80211_MODE_11NA)) {
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isset(bands, IEEE80211_MODE_11NA) ||
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isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
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if (isset(bands, IEEE80211_MODE_11B) ||
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isset(bands, IEEE80211_MODE_11G) ||
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isset(bands, IEEE80211_MODE_11NG))
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isset(bands, IEEE80211_MODE_11NG) ||
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isset(bands, IEEE80211_MODE_VHT_2GHZ))
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return;
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getflags_5ghz(bands, flags, ht40);
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getflags_5ghz(bands, flags, ht40, vht80);
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} else
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getflags_2ghz(bands, flags, ht40);
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}
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@ -1176,6 +1370,7 @@ getflags(const uint8_t bands[], uint32_t flags[], int ht40)
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/*
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* Add one 20 MHz channel into specified channel list.
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*/
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/* XXX VHT */
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int
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ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
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int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
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@ -1184,7 +1379,7 @@ ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
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uint32_t flags[IEEE80211_MODE_MAX];
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int i, error;
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getflags(bands, flags, 0);
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getflags(bands, flags, 0, 0);
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KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
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error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
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@ -1218,6 +1413,7 @@ findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
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/*
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* Add 40 MHz channel pair into specified channel list.
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*/
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/* XXX VHT */
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int
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ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
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int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
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@ -1275,11 +1471,17 @@ ieee80211_get_channel_center_freq(const struct ieee80211_channel *c)
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* For 80+80MHz channels this will be the centre of the primary
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* 80MHz channel; the secondary 80MHz channel will be center_freq2().
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*/
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uint32_t
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ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
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{
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/*
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* VHT - use the pre-calculated centre frequency
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* of the given channel.
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*/
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if (IEEE80211_IS_CHAN_VHT(c))
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return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags));
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if (IEEE80211_IS_CHAN_HT40U(c)) {
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return (c->ic_freq + 10);
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}
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@ -1291,12 +1493,15 @@ ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
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}
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/*
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* For now, no 80+80 support; this is zero.
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* For now, no 80+80 support; it will likely always return 0.
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*/
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uint32_t
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ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c)
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{
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if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0))
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return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags));
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return (0);
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}
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@ -1310,16 +1515,70 @@ add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
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{
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uint16_t freq;
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int i, j, error;
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int is_vht;
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for (i = 0; i < nieee; i++) {
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freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
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for (j = 0; flags[j] != 0; j++) {
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/*
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* Notes:
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* + HT40 and VHT40 channels occur together, so
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* we need to be careful that we actually allow that.
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* + VHT80, VHT160 will coexist with HT40/VHT40, so
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* make sure it's not skipped because of the overlap
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* check used for (V)HT40.
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*/
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is_vht = !! (flags[j] & IEEE80211_CHAN_VHT);
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/*
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* Test for VHT80.
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* XXX This is all very broken right now.
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* What we /should/ do is:
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*
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* + check that the frequency is in the list of
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* allowed VHT80 ranges; and
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* + the other 3 channels in the list are actually
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* also available.
|
||||
*/
|
||||
if (is_vht && flags[j] & IEEE80211_CHAN_VHT80)
|
||||
if (! is_vht80_valid_freq(freq))
|
||||
continue;
|
||||
|
||||
/*
|
||||
* Test for (V)HT40.
|
||||
*
|
||||
* This is also a fall through from VHT80; as we only
|
||||
* allow a VHT80 channel if the VHT40 combination is
|
||||
* also valid. If the VHT40 form is not valid then
|
||||
* we certainly can't do VHT80..
|
||||
*/
|
||||
if (flags[j] & IEEE80211_CHAN_HT40D)
|
||||
/*
|
||||
* Can't have a "lower" channel if we are the
|
||||
* first channel.
|
||||
*
|
||||
* Can't have a "lower" channel if it's below/
|
||||
* within 20MHz of the first channel.
|
||||
*
|
||||
* Can't have a "lower" channel if the channel
|
||||
* below it is not 20MHz away.
|
||||
*/
|
||||
if (i == 0 || ieee[i] < ieee[0] + 4 ||
|
||||
freq - 20 !=
|
||||
ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
|
||||
continue;
|
||||
if (flags[j] & IEEE80211_CHAN_HT40U)
|
||||
/*
|
||||
* Can't have an "upper" channel if we are
|
||||
* the last channel.
|
||||
*
|
||||
* Can't have an "upper" channel be above the
|
||||
* last channel in the list.
|
||||
*
|
||||
* Can't have an "upper" channel if the next
|
||||
* channel according to the math isn't 20MHz
|
||||
* away. (Likely for channel 13/14.)
|
||||
*/
|
||||
if (i == nieee - 1 ||
|
||||
ieee[i] + 4 > ieee[nieee - 1] ||
|
||||
freq + 20 !=
|
||||
@ -1348,6 +1607,7 @@ ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
|
||||
{
|
||||
uint32_t flags[IEEE80211_MODE_MAX];
|
||||
|
||||
/* XXX no VHT for now */
|
||||
getflags_2ghz(bands, flags, ht40);
|
||||
KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
|
||||
|
||||
@ -1360,8 +1620,15 @@ ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
|
||||
int ht40)
|
||||
{
|
||||
uint32_t flags[IEEE80211_MODE_MAX];
|
||||
int vht80 = 0;
|
||||
|
||||
getflags_5ghz(bands, flags, ht40);
|
||||
/*
|
||||
* For now, assume VHT == VHT80 support as a minimum.
|
||||
*/
|
||||
if (isset(bands, IEEE80211_MODE_VHT_5GHZ))
|
||||
vht80 = 1;
|
||||
|
||||
getflags_5ghz(bands, flags, ht40, vht80);
|
||||
KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
|
||||
|
||||
return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
|
||||
@ -1662,6 +1929,7 @@ ieee80211_announce(struct ieee80211com *ic)
|
||||
printf("\n");
|
||||
}
|
||||
ieee80211_ht_announce(ic);
|
||||
ieee80211_vht_announce(ic);
|
||||
}
|
||||
|
||||
void
|
||||
|
||||
Loading…
Reference in New Issue
Block a user