diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2022-03-25 11:42:41 +0100 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2022-04-11 15:24:15 +0200 |
| commit | 6d945a33f2b0aa24fc210dadaa0af3e8218e7002 (patch) | |
| tree | 1e012ab0f0c33c62ce8b76a5e7f7799cf3cd33d3 /net/mac80211/rx.c | |
| parent | e5c95ca094cfe59a4013d711f87ff034cba30f80 (diff) | |
| download | linux-6d945a33f2b0aa24fc210dadaa0af3e8218e7002.tar.bz2 | |
mac80211: introduce BSS color collision detection
Add ieee80211_rx_check_bss_color_collision routine in order to introduce
BSS color collision detection in mac80211 if it is not supported in HW/FW
(e.g. for mt7915 chipset).
Add IEEE80211_HW_DETECTS_COLOR_COLLISION flag to let the driver notify
BSS color collision detection is supported in HW/FW. Set this for ath11k
which apparently didn't need this code.
Tested-by: Peter Chiu <Chui-Hao.Chiu@mediatek.com>
Co-developed-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/a05eeeb1841a84560dc5aaec77894fcb69a54f27.1648204871.git.lorenzo@kernel.org
[clarify commit message a bit, move flag to mac80211]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rx.c')
| -rw-r--r-- | net/mac80211/rx.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index beb6b92eb780..03ee1d9b6d08 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3178,6 +3178,49 @@ static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, ieee80211_tx_skb(sdata, skb); } +static void +ieee80211_rx_check_bss_color_collision(struct ieee80211_rx_data *rx) +{ + struct ieee80211_mgmt *mgmt = (void *)rx->skb->data; + const struct element *ie; + size_t baselen; + + if (!wiphy_ext_feature_isset(rx->local->hw.wiphy, + NL80211_EXT_FEATURE_BSS_COLOR)) + return; + + if (ieee80211_hw_check(&rx->local->hw, DETECTS_COLOR_COLLISION)) + return; + + if (rx->sdata->vif.csa_active) + return; + + baselen = mgmt->u.beacon.variable - rx->skb->data; + if (baselen > rx->skb->len) + return; + + ie = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, + mgmt->u.beacon.variable, + rx->skb->len - baselen); + if (ie && ie->datalen >= sizeof(struct ieee80211_he_operation) && + ie->datalen >= ieee80211_he_oper_size(ie->data + 1)) { + struct ieee80211_bss_conf *bss_conf = &rx->sdata->vif.bss_conf; + const struct ieee80211_he_operation *he_oper; + u8 color; + + he_oper = (void *)(ie->data + 1); + if (le32_get_bits(he_oper->he_oper_params, + IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED)) + return; + + color = le32_get_bits(he_oper->he_oper_params, + IEEE80211_HE_OPERATION_BSS_COLOR_MASK); + if (color == bss_conf->he_bss_color.color) + ieeee80211_obss_color_collision_notify(&rx->sdata->vif, + BIT_ULL(color)); + } +} + static ieee80211_rx_result debug_noinline ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) { @@ -3203,6 +3246,9 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { int sig = 0; + /* sw bss color collision detection */ + ieee80211_rx_check_bss_color_collision(rx); + if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) && !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) sig = status->signal; |