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AP: Add initial support for 6 GHz band
Add support for new hardware mode for 6 GHz band. 6 GHz operation is defined in IEEE P802.11ax/D4.3. 6 GHz band adds global operating classes 131-135 that define channels in frequency range from 5940 MHz to 7105 MHz. Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com> - Remove HOSTAPD_MODE_IEEE80211AX mode - Replace check for HOSTAPD_MODE_IEEE80211AX with is_6ghz_freq() - Move center_idx_to_bw_6ghz() to ieee802_11_common.c file Signed-off-by: Vamsi Krishna <vamsin@codeaurora.org>
This commit is contained in:
Andrei Otcheretianski
Jouni Malinen
parent
a5b2faa714
commit
d7c2c5c98c
@ -146,7 +146,8 @@ ssid=test
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# Operation mode (a = IEEE 802.11a (5 GHz), b = IEEE 802.11b (2.4 GHz),
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# g = IEEE 802.11g (2.4 GHz), ad = IEEE 802.11ad (60 GHz); a/g options are used
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# with IEEE 802.11n (HT), too, to specify band). For IEEE 802.11ac (VHT), this
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# needs to be set to hw_mode=a. When using ACS (see channel parameter), a
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# needs to be set to hw_mode=a. For IEEE 802.11ax (HE) on 6 GHz this needs
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# to be set to hw_mode=a. When using ACS (see channel parameter), a
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# special value "any" can be used to indicate that any support band can be used.
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# This special case is currently supported only with drivers with which
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# offloaded ACS is used.
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@ -805,6 +806,11 @@ wmm_ac_vo_acm=0
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#he_rts_threshold=0
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# HE operating channel information; see matching vht_* parameters for details.
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# On the 6 GHz band the center freq calculation starts from 5.940 GHz offset.
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# For example idx=3 would result in 5955 MHz center frequency. In addition,
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# he_oper_chwidth is ignored, and the channel width is derived from the
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# configured operating class or center frequency indexes (see
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# IEEE P802.11ax/D4.3 Annex E, Table E-4).
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#he_oper_chwidth
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#he_oper_centr_freq_seg0_idx
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#he_oper_centr_freq_seg1_idx
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@ -385,6 +385,71 @@ int hostapd_set_freq_params(struct hostapd_freq_params *data,
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hostapd_encode_edmg_chan(enable_edmg, edmg_channel, channel,
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&data->edmg);
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if (is_6ghz_freq(freq)) {
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if (!data->he_enabled) {
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wpa_printf(MSG_ERROR,
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"Can't set 6 GHz mode - HE isn't enabled");
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return -1;
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}
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if (center_idx_to_bw_6ghz(channel) != 0) {
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wpa_printf(MSG_ERROR,
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"Invalid control channel for 6 GHz band");
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return -1;
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}
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if (!center_segment0) {
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if (center_segment1) {
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wpa_printf(MSG_ERROR,
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"Segment 0 center frequency isn't set");
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return -1;
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}
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data->center_freq1 = data->freq;
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data->bandwidth = 20;
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} else {
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int freq1, freq2 = 0;
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int bw = center_idx_to_bw_6ghz(center_segment0);
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if (bw < 0) {
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wpa_printf(MSG_ERROR,
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"Invalid center frequency index for 6 GHz");
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return -1;
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}
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freq1 = ieee80211_chan_to_freq(NULL, 131,
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center_segment0);
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if (freq1 < 0) {
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wpa_printf(MSG_ERROR,
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"Invalid segment 0 center frequency for 6 GHz");
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return -1;
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}
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if (center_segment1) {
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if (center_idx_to_bw_6ghz(center_segment1) != 2 ||
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bw != 2) {
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wpa_printf(MSG_ERROR,
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"6 GHz 80+80 MHz configuration doesn't use valid 80 MHz channels");
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return -1;
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}
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freq2 = ieee80211_chan_to_freq(NULL, 131,
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center_segment1);
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if (freq2 < 0) {
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wpa_printf(MSG_ERROR,
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"Invalid segment 1 center frequency for UHB");
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return -1;
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}
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}
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data->bandwidth = (1 << (u8) bw) * 20;
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data->center_freq1 = freq1;
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data->center_freq2 = freq2;
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}
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return 0;
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}
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if (data->vht_enabled) switch (oper_chwidth) {
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case CHANWIDTH_USE_HT:
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if (center_segment1 ||
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@ -882,6 +882,19 @@ enum hostapd_hw_mode ieee80211_freq_to_channel_ext(unsigned int freq,
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return HOSTAPD_MODE_IEEE80211AD;
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}
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if (freq > 5940 && freq <= 7105) {
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int bw;
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u8 idx = (freq - 5940) / 5;
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bw = center_idx_to_bw_6ghz(idx);
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if (bw < 0)
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return NUM_HOSTAPD_MODES;
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*channel = idx;
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*op_class = 131 + bw;
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return HOSTAPD_MODE_IEEE80211A;
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}
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return NUM_HOSTAPD_MODES;
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}
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@ -1161,6 +1174,14 @@ static int ieee80211_chan_to_freq_global(u8 op_class, u8 chan)
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if (chan < 36 || chan > 128)
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return -1;
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return 5000 + 5 * chan;
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case 131: /* UHB channels, 20 MHz: 1, 5, 9.. */
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case 132: /* UHB channels, 40 MHz: 3, 11, 19.. */
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case 133: /* UHB channels, 80 MHz: 7, 23, 39.. */
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case 134: /* UHB channels, 160 MHz: 15, 47, 79.. */
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case 135: /* UHB channels, 80+80 MHz: 7, 23, 39.. */
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if (chan < 1 || chan > 233)
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return -1;
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return 5940 + chan * 5;
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case 180: /* 60 GHz band, channels 1..6 */
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if (chan < 1 || chan > 6)
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return -1;
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@ -1591,6 +1612,7 @@ const struct oper_class_map global_op_class[] = {
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{ HOSTAPD_MODE_IEEE80211A, 128, 36, 161, 4, BW80, P2P_SUPP },
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{ HOSTAPD_MODE_IEEE80211A, 129, 50, 114, 16, BW160, P2P_SUPP },
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{ HOSTAPD_MODE_IEEE80211A, 130, 36, 161, 4, BW80P80, P2P_SUPP },
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{ HOSTAPD_MODE_IEEE80211A, 131, 1, 233, 4, BW20, P2P_SUPP },
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{ HOSTAPD_MODE_IEEE80211AD, 180, 1, 4, 1, BW2160, P2P_SUPP },
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{ -1, 0, 0, 0, 0, BW20, NO_P2P_SUPP }
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};
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@ -1905,6 +1927,37 @@ int oper_class_bw_to_int(const struct oper_class_map *map)
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}
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int center_idx_to_bw_6ghz(u8 idx)
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{
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/* channels: 1, 5, 9, 13... */
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if ((idx & 0x3) == 0x1)
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return 0; /* 20 MHz */
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/* channels 3, 11, 19... */
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if ((idx & 0x7) == 0x3)
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return 1; /* 40 MHz */
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/* channels 7, 23, 39.. */
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if ((idx & 0xf) == 0x7)
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return 2; /* 80 MHz */
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/* channels 15, 47, 79...*/
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if ((idx & 0x1f) == 0xf)
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return 3; /* 160 MHz */
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return -1;
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}
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int is_6ghz_freq(int freq)
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{
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if (freq < 5940 || freq > 7105)
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return 0;
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if (center_idx_to_bw_6ghz((freq - 5940) / 5) < 0)
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return 0;
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return 1;
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}
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int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
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size_t nei_rep_len)
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{
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@ -220,6 +220,8 @@ u8 country_to_global_op_class(const char *country, u8 op_class);
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const struct oper_class_map * get_oper_class(const char *country, u8 op_class);
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int oper_class_bw_to_int(const struct oper_class_map *map);
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int center_idx_to_bw_6ghz(u8 idx);
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int is_6ghz_freq(int freq);
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int ieee802_11_parse_candidate_list(const char *pos, u8 *nei_rep,
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size_t nei_rep_len);
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