diff options
Diffstat (limited to 'net/wireless/chan.c')
| -rw-r--r-- | net/wireless/chan.c | 830 |
1 files changed, 399 insertions, 431 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c index ceb9174c5c3d..9f918b77b40e 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -6,7 +6,7 @@ * * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014 Intel Mobile Communications GmbH - * Copyright 2018-2023 Intel Corporation + * Copyright 2018-2024 Intel Corporation */ #include <linux/export.h> @@ -27,11 +27,10 @@ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, if (WARN_ON(!chan)) return; - chandef->chan = chan; - chandef->freq1_offset = chan->freq_offset; - chandef->center_freq2 = 0; - chandef->edmg.bw_config = 0; - chandef->edmg.channels = 0; + *chandef = (struct cfg80211_chan_def) { + .chan = chan, + .freq1_offset = chan->freq_offset, + }; switch (chan_type) { case NL80211_CHAN_NO_HT: @@ -56,6 +55,123 @@ void cfg80211_chandef_create(struct cfg80211_chan_def *chandef, } EXPORT_SYMBOL(cfg80211_chandef_create); +static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) +{ + return nl80211_chan_width_to_mhz(c->width); +} + +static u32 cfg80211_get_start_freq(const struct cfg80211_chan_def *chandef, + u32 cf) +{ + u32 start_freq, center_freq, bandwidth; + + center_freq = MHZ_TO_KHZ((cf == 1) ? + chandef->center_freq1 : chandef->center_freq2); + bandwidth = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef)); + + if (bandwidth <= MHZ_TO_KHZ(20)) + start_freq = center_freq; + else + start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); + + return start_freq; +} + +static u32 cfg80211_get_end_freq(const struct cfg80211_chan_def *chandef, + u32 cf) +{ + u32 end_freq, center_freq, bandwidth; + + center_freq = MHZ_TO_KHZ((cf == 1) ? + chandef->center_freq1 : chandef->center_freq2); + bandwidth = MHZ_TO_KHZ(cfg80211_chandef_get_width(chandef)); + + if (bandwidth <= MHZ_TO_KHZ(20)) + end_freq = center_freq; + else + end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); + + return end_freq; +} + +#define for_each_subchan(chandef, freq, cf) \ + for (u32 punctured = chandef->punctured, \ + cf = 1, freq = cfg80211_get_start_freq(chandef, cf); \ + freq <= cfg80211_get_end_freq(chandef, cf); \ + freq += MHZ_TO_KHZ(20), \ + ((cf == 1 && chandef->center_freq2 != 0 && \ + freq > cfg80211_get_end_freq(chandef, cf)) ? \ + (cf++, freq = cfg80211_get_start_freq(chandef, cf), \ + punctured = 0) : (punctured >>= 1))) \ + if (!(punctured & 1)) + +struct cfg80211_per_bw_puncturing_values { + u8 len; + const u16 *valid_values; +}; + +static const u16 puncturing_values_80mhz[] = { + 0x8, 0x4, 0x2, 0x1 +}; + +static const u16 puncturing_values_160mhz[] = { + 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3 +}; + +static const u16 puncturing_values_320mhz[] = { + 0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00, + 0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f, + 0x300f, 0xc0f, 0x30f, 0xcf, 0x3f +}; + +#define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \ + { \ + .len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \ + .valid_values = puncturing_values_ ## _bw ## mhz \ + } + +static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = { + CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80), + CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160), + CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320) +}; + +static bool valid_puncturing_bitmap(const struct cfg80211_chan_def *chandef) +{ + u32 idx, i, start_freq, primary_center = chandef->chan->center_freq; + + switch (chandef->width) { + case NL80211_CHAN_WIDTH_80: + idx = 0; + start_freq = chandef->center_freq1 - 40; + break; + case NL80211_CHAN_WIDTH_160: + idx = 1; + start_freq = chandef->center_freq1 - 80; + break; + case NL80211_CHAN_WIDTH_320: + idx = 2; + start_freq = chandef->center_freq1 - 160; + break; + default: + return chandef->punctured == 0; + } + + if (!chandef->punctured) + return true; + + /* check if primary channel is punctured */ + if (chandef->punctured & (u16)BIT((primary_center - start_freq) / 20)) + return false; + + for (i = 0; i < per_bw_puncturing[idx].len; i++) { + if (per_bw_puncturing[idx].valid_values[i] == chandef->punctured) + return true; + } + + return false; +} + static bool cfg80211_edmg_chandef_valid(const struct cfg80211_chan_def *chandef) { int max_contiguous = 0; @@ -192,9 +308,35 @@ int nl80211_chan_width_to_mhz(enum nl80211_chan_width chan_width) } EXPORT_SYMBOL(nl80211_chan_width_to_mhz); -static int cfg80211_chandef_get_width(const struct cfg80211_chan_def *c) +static bool cfg80211_valid_center_freq(u32 center, + enum nl80211_chan_width width) { - return nl80211_chan_width_to_mhz(c->width); + int bw; + int step; + + /* We only do strict verification on 6 GHz */ + if (center < 5955 || center > 7115) + return true; + + bw = nl80211_chan_width_to_mhz(width); + if (bw < 0) + return false; + + /* Validate that the channels bw is entirely within the 6 GHz band */ + if (center - bw / 2 < 5945 || center + bw / 2 > 7125) + return false; + + /* With 320 MHz the permitted channels overlap */ + if (bw == 320) + step = 160; + else + step = bw; + + /* + * Valid channels are packed from lowest frequency towards higher ones. + * So test that the lower frequency aligns with one of these steps. + */ + return (center - bw / 2 - 5945) % step == 0; } bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) @@ -308,6 +450,13 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) return false; } + if (!cfg80211_valid_center_freq(chandef->center_freq1, chandef->width)) + return false; + + if (chandef->width == NL80211_CHAN_WIDTH_80P80 && + !cfg80211_valid_center_freq(chandef->center_freq2, chandef->width)) + return false; + /* channel 14 is only for IEEE 802.11b */ if (chandef->center_freq1 == 2484 && chandef->width != NL80211_CHAN_WIDTH_20_NOHT) @@ -317,72 +466,81 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef) !cfg80211_edmg_chandef_valid(chandef)) return false; - return true; + return valid_puncturing_bitmap(chandef); } EXPORT_SYMBOL(cfg80211_chandef_valid); -static void chandef_primary_freqs(const struct cfg80211_chan_def *c, - u32 *pri40, u32 *pri80, u32 *pri160) +int cfg80211_chandef_primary(const struct cfg80211_chan_def *c, + enum nl80211_chan_width primary_chan_width, + u16 *punctured) { - int tmp; + int pri_width = nl80211_chan_width_to_mhz(primary_chan_width); + int width = cfg80211_chandef_get_width(c); + u32 control = c->chan->center_freq; + u32 center = c->center_freq1; + u16 _punct = 0; - switch (c->width) { - case NL80211_CHAN_WIDTH_40: - *pri40 = c->center_freq1; - *pri80 = 0; - *pri160 = 0; - break; - case NL80211_CHAN_WIDTH_80: - case NL80211_CHAN_WIDTH_80P80: - *pri160 = 0; - *pri80 = c->center_freq1; - /* n_P20 */ - tmp = (30 + c->chan->center_freq - c->center_freq1)/20; - /* n_P40 */ - tmp /= 2; - /* freq_P40 */ - *pri40 = c->center_freq1 - 20 + 40 * tmp; - break; - case NL80211_CHAN_WIDTH_160: - *pri160 = c->center_freq1; - /* n_P20 */ - tmp = (70 + c->chan->center_freq - c->center_freq1)/20; - /* n_P40 */ - tmp /= 2; - /* freq_P40 */ - *pri40 = c->center_freq1 - 60 + 40 * tmp; - /* n_P80 */ - tmp /= 2; - *pri80 = c->center_freq1 - 40 + 80 * tmp; - break; - case NL80211_CHAN_WIDTH_320: - /* n_P20 */ - tmp = (150 + c->chan->center_freq - c->center_freq1) / 20; - /* n_P40 */ - tmp /= 2; - /* freq_P40 */ - *pri40 = c->center_freq1 - 140 + 40 * tmp; - /* n_P80 */ - tmp /= 2; - *pri80 = c->center_freq1 - 120 + 80 * tmp; - /* n_P160 */ - tmp /= 2; - *pri160 = c->center_freq1 - 80 + 160 * tmp; - break; - default: - WARN_ON_ONCE(1); + if (WARN_ON_ONCE(pri_width < 0 || width < 0)) + return -1; + + /* not intended to be called this way, can't determine */ + if (WARN_ON_ONCE(pri_width > width)) + return -1; + + if (!punctured) + punctured = &_punct; + + *punctured = c->punctured; + + while (width > pri_width) { + unsigned int bits_to_drop = width / 20 / 2; + + if (control > center) { + center += width / 4; + *punctured >>= bits_to_drop; + } else { + center -= width / 4; + *punctured &= (1 << bits_to_drop) - 1; + } + width /= 2; } + + return center; } +EXPORT_SYMBOL(cfg80211_chandef_primary); -const struct cfg80211_chan_def * -cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, - const struct cfg80211_chan_def *c2) +static const struct cfg80211_chan_def * +check_chandef_primary_compat(const struct cfg80211_chan_def *c1, + const struct cfg80211_chan_def *c2, + enum nl80211_chan_width primary_chan_width) { - u32 c1_pri40, c1_pri80, c2_pri40, c2_pri80, c1_pri160, c2_pri160; + u16 punct_c1 = 0, punct_c2 = 0; + + /* check primary is compatible -> error if not */ + if (cfg80211_chandef_primary(c1, primary_chan_width, &punct_c1) != + cfg80211_chandef_primary(c2, primary_chan_width, &punct_c2)) + return ERR_PTR(-EINVAL); + + if (punct_c1 != punct_c2) + return ERR_PTR(-EINVAL); + + /* assumes c1 is smaller width, if that was just checked -> done */ + if (c1->width == primary_chan_width) + return c2; + + /* otherwise continue checking the next width */ + return NULL; +} + +static const struct cfg80211_chan_def * +_cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, + const struct cfg80211_chan_def *c2) +{ + const struct cfg80211_chan_def *ret; /* If they are identical, return */ if (cfg80211_chandef_identical(c1, c2)) - return c1; + return c2; /* otherwise, must have same control channel */ if (c1->chan != c2->chan) @@ -396,79 +554,84 @@ cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, return NULL; /* - * can't be compatible if one of them is 5 or 10 MHz, + * can't be compatible if one of them is 5/10 MHz or S1G * but they don't have the same width. */ - if (c1->width == NL80211_CHAN_WIDTH_5 || - c1->width == NL80211_CHAN_WIDTH_10 || - c2->width == NL80211_CHAN_WIDTH_5 || - c2->width == NL80211_CHAN_WIDTH_10) +#define NARROW_OR_S1G(width) ((width) == NL80211_CHAN_WIDTH_5 || \ + (width) == NL80211_CHAN_WIDTH_10 || \ + (width) == NL80211_CHAN_WIDTH_1 || \ + (width) == NL80211_CHAN_WIDTH_2 || \ + (width) == NL80211_CHAN_WIDTH_4 || \ + (width) == NL80211_CHAN_WIDTH_8 || \ + (width) == NL80211_CHAN_WIDTH_16) + + if (NARROW_OR_S1G(c1->width) || NARROW_OR_S1G(c2->width)) return NULL; - if (c1->width == NL80211_CHAN_WIDTH_20_NOHT || - c1->width == NL80211_CHAN_WIDTH_20) - return c2; - - if (c2->width == NL80211_CHAN_WIDTH_20_NOHT || - c2->width == NL80211_CHAN_WIDTH_20) - return c1; - - chandef_primary_freqs(c1, &c1_pri40, &c1_pri80, &c1_pri160); - chandef_primary_freqs(c2, &c2_pri40, &c2_pri80, &c2_pri160); - - if (c1_pri40 != c2_pri40) - return NULL; + /* + * Make sure that c1 is always the narrower one, so that later + * we either return NULL or c2 and don't have to check both + * directions. + */ + if (c1->width > c2->width) + swap(c1, c2); - if (c1->width == NL80211_CHAN_WIDTH_40) + /* + * No further checks needed if the "narrower" one is only 20 MHz. + * Here "narrower" includes being a 20 MHz non-HT channel vs. a + * 20 MHz HT (or later) one. + */ + if (c1->width <= NL80211_CHAN_WIDTH_20) return c2; - if (c2->width == NL80211_CHAN_WIDTH_40) - return c1; + ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_40); + if (ret) + return ret; - if (c1_pri80 != c2_pri80) - return NULL; + ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_80); + if (ret) + return ret; - if (c1->width == NL80211_CHAN_WIDTH_80 && - c2->width > NL80211_CHAN_WIDTH_80) - return c2; + /* + * If c1 is 80+80, then c2 is 160 or higher, but that cannot + * match. If c2 was also 80+80 it was already either accepted + * or rejected above (identical or not, respectively.) + */ + if (c1->width == NL80211_CHAN_WIDTH_80P80) + return NULL; - if (c2->width == NL80211_CHAN_WIDTH_80 && - c1->width > NL80211_CHAN_WIDTH_80) - return c1; + ret = check_chandef_primary_compat(c1, c2, NL80211_CHAN_WIDTH_160); + if (ret) + return ret; - WARN_ON(!c1_pri160 && !c2_pri160); - if (c1_pri160 && c2_pri160 && c1_pri160 != c2_pri160) - return NULL; + /* + * Getting here would mean they're both wider than 160, have the + * same primary 160, but are not identical - this cannot happen + * since they must be 320 (no wider chandefs exist, at least yet.) + */ + WARN_ON_ONCE(1); - if (c1->width > c2->width) - return c1; - return c2; + return NULL; } -EXPORT_SYMBOL(cfg80211_chandef_compatible); -static void cfg80211_set_chans_dfs_state(struct wiphy *wiphy, u32 center_freq, - u32 bandwidth, - enum nl80211_dfs_state dfs_state) +const struct cfg80211_chan_def * +cfg80211_chandef_compatible(const struct cfg80211_chan_def *c1, + const struct cfg80211_chan_def *c2) { - struct ieee80211_channel *c; - u32 freq; + const struct cfg80211_chan_def *ret; - for (freq = center_freq - bandwidth/2 + 10; - freq <= center_freq + bandwidth/2 - 10; - freq += 20) { - c = ieee80211_get_channel(wiphy, freq); - if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) - continue; - - c->dfs_state = dfs_state; - c->dfs_state_entered = jiffies; - } + ret = _cfg80211_chandef_compatible(c1, c2); + if (IS_ERR(ret)) + return NULL; + return ret; } +EXPORT_SYMBOL(cfg80211_chandef_compatible); void cfg80211_set_dfs_state(struct wiphy *wiphy, const struct cfg80211_chan_def *chandef, enum nl80211_dfs_state dfs_state) { + struct ieee80211_channel *c; int width; if (WARN_ON(!cfg80211_chandef_valid(chandef))) @@ -478,41 +641,14 @@ void cfg80211_set_dfs_state(struct wiphy *wiphy, if (width < 0) return; - cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq1, - width, dfs_state); - - if (!chandef->center_freq2) - return; - cfg80211_set_chans_dfs_state(wiphy, chandef->center_freq2, - width, dfs_state); -} - -static u32 cfg80211_get_start_freq(u32 center_freq, - u32 bandwidth) -{ - u32 start_freq; - - bandwidth = MHZ_TO_KHZ(bandwidth); - if (bandwidth <= MHZ_TO_KHZ(20)) - start_freq = center_freq; - else - start_freq = center_freq - bandwidth / 2 + MHZ_TO_KHZ(10); - - return start_freq; -} - -static u32 cfg80211_get_end_freq(u32 center_freq, - u32 bandwidth) -{ - u32 end_freq; - - bandwidth = MHZ_TO_KHZ(bandwidth); - if (bandwidth <= MHZ_TO_KHZ(20)) - end_freq = center_freq; - else - end_freq = center_freq + bandwidth / 2 - MHZ_TO_KHZ(10); + for_each_subchan(chandef, freq, cf) { + c = ieee80211_get_channel_khz(wiphy, freq); + if (!c || !(c->flags & IEEE80211_CHAN_RADAR)) + continue; - return end_freq; + c->dfs_state = dfs_state; + c->dfs_state_entered = jiffies; + } } static bool @@ -589,17 +725,12 @@ static bool cfg80211_dfs_permissive_chan(struct wiphy *wiphy, } static int cfg80211_get_chans_dfs_required(struct wiphy *wiphy, - u32 center_freq, - u32 bandwidth, - enum nl80211_iftype iftype) + const struct cfg80211_chan_def *chandef, + enum nl80211_iftype iftype) { struct ieee80211_channel *c; - u32 freq, start_freq, end_freq; - - start_freq = cfg80211_get_start_freq(center_freq, bandwidth); - end_freq = cfg80211_get_end_freq(center_freq, bandwidth); - for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { + for_each_subchan(chandef, freq, cf) { c = ieee80211_get_channel_khz(wiphy, freq); if (!c) return -EINVAL; @@ -632,25 +763,9 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, if (width < 0) return -EINVAL; - ret = cfg80211_get_chans_dfs_required(wiphy, - ieee80211_chandef_to_khz(chandef), - width, iftype); - if (ret < 0) - return ret; - else if (ret > 0) - return BIT(chandef->width); - - if (!chandef->center_freq2) - return 0; - - ret = cfg80211_get_chans_dfs_required(wiphy, - MHZ_TO_KHZ(chandef->center_freq2), - width, iftype); - if (ret < 0) - return ret; - else if (ret > 0) - return BIT(chandef->width); + ret = cfg80211_get_chans_dfs_required(wiphy, chandef, iftype); + return (ret > 0) ? BIT(chandef->width) : ret; break; case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_OCB: @@ -670,16 +785,18 @@ int cfg80211_chandef_dfs_required(struct wiphy *wiphy, } EXPORT_SYMBOL(cfg80211_chandef_dfs_required); -static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, - u32 center_freq, - u32 bandwidth) +bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef) { struct ieee80211_channel *c; - u32 freq, start_freq, end_freq; - int count = 0; + int width, count = 0; - start_freq = cfg80211_get_start_freq(center_freq, bandwidth); - end_freq = cfg80211_get_end_freq(center_freq, bandwidth); + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return false; + + width = cfg80211_chandef_get_width(chandef); + if (width < 0) + return false; /* * Check entire range of channels for the bandwidth. @@ -687,61 +804,24 @@ static int cfg80211_get_chans_dfs_usable(struct wiphy *wiphy, * DFS_AVAILABLE). Return number of usable channels * (require CAC). Allow DFS and non-DFS channel mix. */ - for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { + for_each_subchan(chandef, freq, cf) { c = ieee80211_get_channel_khz(wiphy, freq); if (!c) - return -EINVAL; + return false; if (c->flags & IEEE80211_CHAN_DISABLED) - return -EINVAL; + return false; if (c->flags & IEEE80211_CHAN_RADAR) { if (c->dfs_state == NL80211_DFS_UNAVAILABLE) - return -EINVAL; + return false; if (c->dfs_state == NL80211_DFS_USABLE) count++; } } - return count; -} - -bool cfg80211_chandef_dfs_usable(struct wiphy *wiphy, - const struct cfg80211_chan_def *chandef) -{ - int width; - int r1, r2 = 0; - - if (WARN_ON(!cfg80211_chandef_valid(chandef))) - return false; - - width = cfg80211_chandef_get_width(chandef); - if (width < 0) - return false; - - r1 = cfg80211_get_chans_dfs_usable(wiphy, - MHZ_TO_KHZ(chandef->center_freq1), - width); - - if (r1 < 0) - return false; - - switch (chandef->width) { - case NL80211_CHAN_WIDTH_80P80: - WARN_ON(!chandef->center_freq2); - r2 = cfg80211_get_chans_dfs_usable(wiphy, - MHZ_TO_KHZ(chandef->center_freq2), - width); - if (r2 < 0) - return false; - break; - default: - WARN_ON(chandef->center_freq2); - break; - } - - return (r1 + r2 > 0); + return count > 0; } EXPORT_SYMBOL(cfg80211_chandef_dfs_usable); @@ -903,10 +983,10 @@ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) continue; - wiphy_lock(&rdev->wiphy); + guard(wiphy)(&rdev->wiphy); + found = cfg80211_is_wiphy_oper_chan(&rdev->wiphy, chan) || cfg80211_offchan_chain_is_active(rdev, chan); - wiphy_unlock(&rdev->wiphy); if (found) return true; @@ -915,26 +995,29 @@ bool cfg80211_any_wiphy_oper_chan(struct wiphy *wiphy, return false; } -static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, - u32 center_freq, - u32 bandwidth) +static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef) { struct ieee80211_channel *c; - u32 freq, start_freq, end_freq; + int width; bool dfs_offload; + if (WARN_ON(!cfg80211_chandef_valid(chandef))) + return false; + + width = cfg80211_chandef_get_width(chandef); + if (width < 0) + return false; + dfs_offload = wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD); - start_freq = cfg80211_get_start_freq(center_freq, bandwidth); - end_freq = cfg80211_get_end_freq(center_freq, bandwidth); - /* * Check entire range of channels for the bandwidth. * If any channel in between is disabled or has not * had gone through CAC return false */ - for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { + for_each_subchan(chandef, freq, cf) { c = ieee80211_get_channel_khz(wiphy, freq); if (!c) return false; @@ -951,119 +1034,54 @@ static bool cfg80211_get_chans_dfs_available(struct wiphy *wiphy, return true; } -static bool cfg80211_chandef_dfs_available(struct wiphy *wiphy, - const struct cfg80211_chan_def *chandef) +unsigned int +cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef) { + struct ieee80211_channel *c; int width; - int r; + unsigned int t1 = 0, t2 = 0; if (WARN_ON(!cfg80211_chandef_valid(chandef))) - return false; + return 0; width = cfg80211_chandef_get_width(chandef); if (width < 0) - return false; - - r = cfg80211_get_chans_dfs_available(wiphy, - MHZ_TO_KHZ(chandef->center_freq1), - width); - - /* If any of channels unavailable for cf1 just return */ - if (!r) - return r; - - switch (chandef->width) { - case NL80211_CHAN_WIDTH_80P80: - WARN_ON(!chandef->center_freq2); - r = cfg80211_get_chans_dfs_available(wiphy, - MHZ_TO_KHZ(chandef->center_freq2), - width); - break; - default: - WARN_ON(chandef->center_freq2); - break; - } - - return r; -} - -static unsigned int cfg80211_get_chans_dfs_cac_time(struct wiphy *wiphy, - u32 center_freq, - u32 bandwidth) -{ - struct ieee80211_channel *c; - u32 start_freq, end_freq, freq; - unsigned int dfs_cac_ms = 0; - - start_freq = cfg80211_get_start_freq(center_freq, bandwidth); - end_freq = cfg80211_get_end_freq(center_freq, bandwidth); + return 0; - for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { + for_each_subchan(chandef, freq, cf) { c = ieee80211_get_channel_khz(wiphy, freq); - if (!c) - return 0; - - if (c->flags & IEEE80211_CHAN_DISABLED) - return 0; + if (!c || (c->flags & IEEE80211_CHAN_DISABLED)) { + if (cf == 1) + t1 = INT_MAX; + else + t2 = INT_MAX; + continue; + } if (!(c->flags & IEEE80211_CHAN_RADAR)) continue; - if (c->dfs_cac_ms > dfs_cac_ms) - dfs_cac_ms = c->dfs_cac_ms; - } - - return dfs_cac_ms; -} + if (cf == 1 && c->dfs_cac_ms > t1) + t1 = c->dfs_cac_ms; -unsigned int -cfg80211_chandef_dfs_cac_time(struct wiphy *wiphy, - const struct cfg80211_chan_def *chandef) -{ - int width; - unsigned int t1 = 0, t2 = 0; - - if (WARN_ON(!cfg80211_chandef_valid(chandef))) - return 0; + if (cf == 2 && c->dfs_cac_ms > t2) + t2 = c->dfs_cac_ms; + } - width = cfg80211_chandef_get_width(chandef); - if (width < 0) + if (t1 == INT_MAX && t2 == INT_MAX) return 0; - t1 = cfg80211_get_chans_dfs_cac_time(wiphy, - MHZ_TO_KHZ(chandef->center_freq1), - width); + if (t1 == INT_MAX) + return t2; - if (!chandef->center_freq2) + if (t2 == INT_MAX) return t1; - t2 = cfg80211_get_chans_dfs_cac_time(wiphy, - MHZ_TO_KHZ(chandef->center_freq2), - width); - return max(t1, t2); } EXPORT_SYMBOL(cfg80211_chandef_dfs_cac_time); -static bool cfg80211_secondary_chans_ok(struct wiphy *wiphy, - u32 center_freq, u32 bandwidth, - u32 prohibited_flags) -{ - struct ieee80211_channel *c; - u32 freq, start_freq, end_freq; - - start_freq = cfg80211_get_start_freq(center_freq, bandwidth); - end_freq = cfg80211_get_end_freq(center_freq, bandwidth); - - for (freq = start_freq; freq <= end_freq; freq += MHZ_TO_KHZ(20)) { - c = ieee80211_get_channel_khz(wiphy, freq); - if (!c || c->flags & prohibited_flags) - return false; - } - - return true; -} - /* check if the operating channels are valid and supported */ static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, enum ieee80211_edmg_bw_config edmg_bw_config, @@ -1117,9 +1135,10 @@ static bool cfg80211_edmg_usable(struct wiphy *wiphy, u8 edmg_channels, return true; } -bool cfg80211_chandef_usable(struct wiphy *wiphy, - const struct cfg80211_chan_def *chandef, - u32 prohibited_flags) +bool _cfg80211_chandef_usable(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef, + u32 prohibited_flags, + u32 permitting_flags) { struct ieee80211_sta_ht_cap *ht_cap; struct ieee80211_sta_vht_cap *vht_cap; @@ -1128,6 +1147,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, bool ext_nss_cap, support_80_80 = false, support_320 = false; const struct ieee80211_sband_iftype_data *iftd; struct ieee80211_supported_band *sband; + struct ieee80211_channel *c; int i; if (WARN_ON(!cfg80211_chandef_valid(chandef))) @@ -1278,17 +1298,24 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy, if (width < 20) prohibited_flags |= IEEE80211_CHAN_NO_OFDM; + for_each_subchan(chandef, freq, cf) { + c = ieee80211_get_channel_khz(wiphy, freq); + if (!c) + return false; + if (c->flags & permitting_flags) + continue; + if (c->flags & prohibited_flags) + return false; + } - if (!cfg80211_secondary_chans_ok(wiphy, - ieee80211_chandef_to_khz(chandef), - width, prohibited_flags)) - return false; + return true; +} - if (!chandef->center_freq2) - return true; - return cfg80211_secondary_chans_ok(wiphy, - MHZ_TO_KHZ(chandef->center_freq2), - width, prohibited_flags); +bool cfg80211_chandef_usable(struct wiphy *wiphy, + const struct cfg80211_chan_def *chandef, + u32 prohibited_flags) +{ + return _cfg80211_chandef_usable(wiphy, chandef, prohibited_flags, 0); } EXPORT_SYMBOL(cfg80211_chandef_usable); @@ -1410,49 +1437,50 @@ static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, struct cfg80211_chan_def *chandef, enum nl80211_iftype iftype, - bool check_no_ir) + u32 prohibited_flags, + u32 permitting_flags) { - bool res; - u32 prohibited_flags = IEEE80211_CHAN_DISABLED; + bool res, check_radar; int dfs_required; - trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); + trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, + prohibited_flags, + permitting_flags); - if (check_no_ir) - prohibited_flags |= IEEE80211_CHAN_NO_IR; + if (!_cfg80211_chandef_usable(wiphy, chandef, + IEEE80211_CHAN_DISABLED, 0)) + return false; dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype); - if (dfs_required != 0) - prohibited_flags |= IEEE80211_CHAN_RADAR; + check_radar = dfs_required != 0; if (dfs_required > 0 && cfg80211_chandef_dfs_available(wiphy, chandef)) { /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ - prohibited_flags = IEEE80211_CHAN_DISABLED; + prohibited_flags &= ~IEEE80211_CHAN_NO_IR; + check_radar = false; } - res = cfg80211_chandef_usable(wiphy, chandef, prohibited_flags); + if (check_radar && + !_cfg80211_chandef_usable(wiphy, chandef, + IEEE80211_CHAN_RADAR, 0)) + return false; + + res = _cfg80211_chandef_usable(wiphy, chandef, + prohibited_flags, + permitting_flags); trace_cfg80211_return_bool(res); return res; } -bool cfg80211_reg_can_beacon(struct wiphy *wiphy, - struct cfg80211_chan_def *chandef, - enum nl80211_iftype iftype) -{ - return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, true); -} -EXPORT_SYMBOL(cfg80211_reg_can_beacon); - -bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, - struct cfg80211_chan_def *chandef, - enum nl80211_iftype iftype) +bool cfg80211_reg_check_beaconing(struct wiphy *wiphy, + struct cfg80211_chan_def *chandef, + struct cfg80211_beaconing_check_config *cfg) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); - bool check_no_ir; - - lockdep_assert_held(&rdev->wiphy.mtx); + u32 permitting_flags = 0; + bool check_no_ir = true; /* * Under certain conditions suggested by some regulatory bodies a @@ -1460,14 +1488,23 @@ bool cfg80211_reg_can_beacon_relax(struct wiphy *wiphy, * only if such relaxations are not enabled and the conditions are not * met. */ - check_no_ir = !cfg80211_ir_permissive_chan(wiphy, iftype, - chandef->chan); + if (cfg->relax) { + lockdep_assert_held(&rdev->wiphy.mtx); + check_no_ir = !cfg80211_ir_permissive_chan(wiphy, cfg->iftype, + chandef->chan); + } + + if (cfg->reg_power == IEEE80211_REG_VLP_AP) + permitting_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP; - return _cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); + return _cfg80211_reg_can_beacon(wiphy, chandef, cfg->iftype, + check_no_ir ? IEEE80211_CHAN_NO_IR : 0, + permitting_flags); } -EXPORT_SYMBOL(cfg80211_reg_can_beacon_relax); +EXPORT_SYMBOL(cfg80211_reg_check_beaconing); int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, + struct net_device *dev, struct cfg80211_chan_def *chandef) { if (!rdev->ops->set_monitor_channel) @@ -1475,7 +1512,7 @@ int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev, if (!cfg80211_has_monitors_only(rdev)) return -EBUSY; - return rdev_set_monitor_channel(rdev, chandef); + return rdev_set_monitor_channel(rdev, dev, chandef); } bool cfg80211_any_usable_channels(struct wiphy *wiphy, @@ -1532,72 +1569,3 @@ struct cfg80211_chan_def *wdev_chandef(struct wireless_dev *wdev, } } EXPORT_SYMBOL(wdev_chandef); - -struct cfg80211_per_bw_puncturing_values { - u8 len; - const u16 *valid_values; -}; - -static const u16 puncturing_values_80mhz[] = { - 0x8, 0x4, 0x2, 0x1 -}; - -static const u16 puncturing_values_160mhz[] = { - 0x80, 0x40, 0x20, 0x10, 0x8, 0x4, 0x2, 0x1, 0xc0, 0x30, 0xc, 0x3 -}; - -static const u16 puncturing_values_320mhz[] = { - 0xc000, 0x3000, 0xc00, 0x300, 0xc0, 0x30, 0xc, 0x3, 0xf000, 0xf00, - 0xf0, 0xf, 0xfc00, 0xf300, 0xf0c0, 0xf030, 0xf00c, 0xf003, 0xc00f, - 0x300f, 0xc0f, 0x30f, 0xcf, 0x3f -}; - -#define CFG80211_PER_BW_VALID_PUNCTURING_VALUES(_bw) \ - { \ - .len = ARRAY_SIZE(puncturing_values_ ## _bw ## mhz), \ - .valid_values = puncturing_values_ ## _bw ## mhz \ - } - -static const struct cfg80211_per_bw_puncturing_values per_bw_puncturing[] = { - CFG80211_PER_BW_VALID_PUNCTURING_VALUES(80), - CFG80211_PER_BW_VALID_PUNCTURING_VALUES(160), - CFG80211_PER_BW_VALID_PUNCTURING_VALUES(320) -}; - -bool cfg80211_valid_disable_subchannel_bitmap(u16 *bitmap, - const struct cfg80211_chan_def *chandef) -{ - u32 idx, i, start_freq; - - switch (chandef->width) { - case NL80211_CHAN_WIDTH_80: - idx = 0; - start_freq = chandef->center_freq1 - 40; - break; - case NL80211_CHAN_WIDTH_160: - idx = 1; - start_freq = chandef->center_freq1 - 80; - break; - case NL80211_CHAN_WIDTH_320: - idx = 2; - start_freq = chandef->center_freq1 - 160; - break; - default: - *bitmap = 0; - break; - } - - if (!*bitmap) - return true; - - /* check if primary channel is punctured */ - if (*bitmap & (u16)BIT((chandef->chan->center_freq - start_freq) / 20)) - return false; - - for (i = 0; i < per_bw_puncturing[idx].len; i++) - if (per_bw_puncturing[idx].valid_values[i] == *bitmap) - return true; - - return false; -} -EXPORT_SYMBOL(cfg80211_valid_disable_subchannel_bitmap); |