RU preamble puncturing is allowed for bandwidths more that 80 MHz except 80+80. Drivers may not support puncturing at all or have restrictions for a minimum bandwidth. Add new attribute NL80211_ATTR_RU_PUNCT_SUPP_BW to advertise the driver support to the userspace. Default value (0) will indicate that RU puncturing is not supported. Signed-off-by: Aloka Dixit <quic_alokad@xxxxxxxxxxx> --- v2: Moved boundary check for ru_punct_supp_bw to wiphy_register(). include/net/cfg80211.h | 6 ++++++ include/uapi/linux/nl80211.h | 22 ++++++++++++++++++++++ net/wireless/core.c | 4 ++++ net/wireless/nl80211.c | 19 +++++++++++++++++++ 4 files changed, 51 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 68713388b617..46630a125e8e 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -5129,6 +5129,10 @@ struct wiphy_iftype_akm_suites { * @ema_max_profile_periodicity: maximum profile periodicity supported by * the driver. Setting this field to a non-zero value indicates that the * driver supports enhanced multi-BSSID advertisements (EMA AP). + * + * @ru_punct_supp_bw: Whether the driver supports RU puncturing, and if so, + * for which bandwidths. See &enum nl80211_ru_punct_supp_bw for the + * possible values for this field. */ struct wiphy { struct mutex mtx; @@ -5276,6 +5280,8 @@ struct wiphy { u8 mbssid_max_interfaces; u8 ema_max_profile_periodicity; + enum nl80211_ru_punct_supp_bw ru_punct_supp_bw; + char priv[] __aligned(NETDEV_ALIGN); }; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 0568a79097b8..bdd2cb22b5a0 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -2663,6 +2663,10 @@ enum nl80211_commands { * association request when used with NL80211_CMD_NEW_STATION). Can be set * only if %NL80211_STA_FLAG_WME is set. * + * @NL80211_ATTR_RU_PUNCT_SUPP_BW: (u8) Minimum bandwidth for which + * the driver supports preamble puncturing, value should be of type + * &enum nl80211_ru_punct_supp_bw + * * @NUM_NL80211_ATTR: total number of nl80211_attrs available * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use @@ -3175,6 +3179,8 @@ enum nl80211_attrs { NL80211_ATTR_EHT_CAPABILITY, + NL80211_ATTR_RU_PUNCT_SUPP_BW, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -7600,4 +7606,20 @@ enum nl80211_ap_settings_flags { NL80211_AP_SETTINGS_SA_QUERY_OFFLOAD_SUPPORT = 1 << 1, }; +/** + * enum nl80211_ru_punct_supp_bw - Bandwidths supporting preamble puncturing + * + * @NL80211_RU_PUNCT_NOT_SUPP: preamble puncturing is not supported + * @NL80211_RU_PUNCT_SUPP_BW_80: puncturing supported within channels of at + * least 80 MHz bandwidth + * @NL80211_RU_PUNCT_SUPP_BW_160: puncturing supported within channels of at + * least 160 MHz bandwidth + * @NL80211_RU_PUNCT_SUPP_BW_320: puncturing supported within 320 MHz. + */ +enum nl80211_ru_punct_supp_bw { + NL80211_RU_PUNCT_NOT_SUPP, + NL80211_RU_PUNCT_SUPP_BW_80, + NL80211_RU_PUNCT_SUPP_BW_160, + NL80211_RU_PUNCT_SUPP_BW_320, +}; #endif /* __LINUX_NL80211_H */ diff --git a/net/wireless/core.c b/net/wireless/core.c index f08d4b3bb148..795f2400373d 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -892,6 +892,10 @@ int wiphy_register(struct wiphy *wiphy) return -EINVAL; } + if (WARN_ON(rdev->wiphy.ru_punct_supp_bw > + NL80211_RU_PUNCT_SUPP_BW_320)) + return -EINVAL; + for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { /* * Validate we have a policy (can be explicitly set to diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index ee1c2b6b6971..1fbfda2b3b14 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -790,6 +790,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { NLA_POLICY_RANGE(NLA_BINARY, NL80211_EHT_MIN_CAPABILITY_LEN, NL80211_EHT_MAX_CAPABILITY_LEN), + [NL80211_ATTR_RU_PUNCT_SUPP_BW] = + NLA_POLICY_MAX(NLA_U8, NL80211_RU_PUNCT_SUPP_BW_320), }; /* policy for the key attributes */ @@ -2301,6 +2303,20 @@ static int nl80211_put_mbssid_support(struct wiphy *wiphy, struct sk_buff *msg) return -ENOBUFS; } +static int +nl80211_put_ru_punct_supp_bw(struct cfg80211_registered_device *rdev, + struct sk_buff *msg) +{ + if (!rdev->wiphy.ru_punct_supp_bw) + return 0; + + if (nla_put_u8(msg, NL80211_ATTR_RU_PUNCT_SUPP_BW, + rdev->wiphy.ru_punct_supp_bw)) + return -ENOBUFS; + + return 0; +} + struct nl80211_dump_wiphy_state { s64 filter_wiphy; long start; @@ -2889,6 +2905,9 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev, if (nl80211_put_mbssid_support(&rdev->wiphy, msg)) goto nla_put_failure; + if (nl80211_put_ru_punct_supp_bw(rdev, msg)) + goto nla_put_failure; + /* done */ state->split_start = 0; break; base-commit: f5ba9781dde28f87d1e6db580ab63b308b5b5e1b -- 2.31.1