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authorLorenzo Bianconi <lorenzo@kernel.org>2022-03-25 11:42:41 +0100
committerJohannes Berg <johannes.berg@intel.com>2022-04-11 15:24:15 +0200
commit6d945a33f2b0aa24fc210dadaa0af3e8218e7002 (patch)
tree1e012ab0f0c33c62ce8b76a5e7f7799cf3cd33d3 /net/mac80211
parente5c95ca094cfe59a4013d711f87ff034cba30f80 (diff)
downloadlinux-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')
-rw-r--r--net/mac80211/debugfs.c1
-rw-r--r--net/mac80211/rx.c46
2 files changed, 47 insertions, 0 deletions
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index f4c9a92f50f9..1fe43b264d75 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -504,6 +504,7 @@ static const char *hw_flag_names[] = {
FLAG(SUPPORTS_TX_ENCAP_OFFLOAD),
FLAG(SUPPORTS_RX_DECAP_OFFLOAD),
FLAG(SUPPORTS_CONC_MON_RX_DECAP),
+ FLAG(DETECTS_COLOR_COLLISION),
#undef FLAG
};
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;