From patchwork Thu Aug 27 22:32:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Pedersen X-Patchwork-Id: 11741937 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 01F53739 for ; Thu, 27 Aug 2020 22:33:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E88EA20872 for ; Thu, 27 Aug 2020 22:33:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728053AbgH0Wdl (ORCPT ); Thu, 27 Aug 2020 18:33:41 -0400 Received: from mail.adapt-ip.com ([173.164.178.19]:50522 "EHLO web.adapt-ip.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728012AbgH0Wdc (ORCPT ); Thu, 27 Aug 2020 18:33:32 -0400 Received: from localhost (localhost [127.0.0.1]) by web.adapt-ip.com (Postfix) with ESMTP id F2C094F81CE; Thu, 27 Aug 2020 22:33:31 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at web.adapt-ip.com Received: from web.adapt-ip.com ([127.0.0.1]) by localhost (web.adapt-ip.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id oZxcRD6rjuwJ; Thu, 27 Aug 2020 22:33:29 +0000 (UTC) Received: from atlas.campbell.adapt-ip.com (gateway.adapt-ip.com [173.164.178.20]) (Authenticated sender: thomas@adapt-ip.com) by web.adapt-ip.com (Postfix) with ESMTPSA id BD5E34F81D1; Thu, 27 Aug 2020 22:33:11 +0000 (UTC) From: Thomas Pedersen To: Johannes Berg Cc: linux-wireless , Thomas Pedersen Subject: [PATCH 14/22] mac80211: encode listen interval for S1G Date: Thu, 27 Aug 2020 15:32:56 -0700 Message-Id: <20200827223304.16155-15-thomas@adapt-ip.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200827223304.16155-1-thomas@adapt-ip.com> References: <20200827223304.16155-1-thomas@adapt-ip.com> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org S1G allows listen interval up to 2^14 * 10000 beacon intervals. In order to do this listen interval needs a scaling factor applied to the lower 14 bits. Calculate this and properly encode the listen interval for S1G STAs. See IEEE802.11ah-2016 Table 9-44a for reference. Signed-off-by: Thomas Pedersen --- include/linux/ieee80211.h | 8 ++++++++ net/mac80211/ieee80211_i.h | 1 + net/mac80211/mlme.c | 11 +++++++---- net/mac80211/util.c | 20 ++++++++++++++++++++ 4 files changed, 36 insertions(+), 4 deletions(-) diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h index 9307b60cef97..93c1496af8f2 100644 --- a/include/linux/ieee80211.h +++ b/include/linux/ieee80211.h @@ -2446,6 +2446,14 @@ ieee80211_he_spr_size(const u8 *he_spr_ie) #define S1G_CAPAB_B9_LINK_ADAPT_PER_CONTROL_RESPONSE BIT(0) +#define LISTEN_INT_USF_MASK (BIT(14) | BIT(15)) +#define LISTEN_INT_USF_SHIFT 14 + +#define IEEE80211_MAX_USF 3 +#define IEEE80211_MAX_UI ((1 << 14) - 1) + +static const int listen_int_usf[] = { 1, 10, 1000, 10000 }; + /* Authentication algorithms */ #define WLAN_AUTH_OPEN 0 #define WLAN_AUTH_SHARED_KEY 1 diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 378945b0f3a0..8b779ad363c5 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2293,6 +2293,7 @@ void ieee80211_tdls_chsw_work(struct work_struct *wk); void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata, const u8 *peer, u16 reason); const char *ieee80211_get_reason_code_string(u16 reason_code); +__le16 ieee80211_encode_usf(int val); extern const struct ethtool_ops ieee80211_ethtool_ops; diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index b69889563457..6a62a221b89e 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -686,6 +686,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) struct ieee80211_local *local = sdata->local; struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; + struct ieee80211_bss *bss = (void *)assoc_data->bss->priv; struct sk_buff *skb; struct ieee80211_mgmt *mgmt; u8 *pos, qos_info, *ie_start; @@ -696,6 +697,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) struct ieee80211_chanctx_conf *chanctx_conf; struct ieee80211_channel *chan; u32 rates = 0; + __le16 listen_int; struct element *ext_capa = NULL; /* we know it's writable, cast away the const */ @@ -784,13 +786,15 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN); + listen_int = cpu_to_le16(bss->s1g ? + ieee80211_encode_usf(local->hw.conf.listen_interval) : + local->hw.conf.listen_interval); if (!is_zero_ether_addr(assoc_data->prev_bssid)) { skb_put(skb, 10); mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ); mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab); - mgmt->u.reassoc_req.listen_interval = - cpu_to_le16(local->hw.conf.listen_interval); + mgmt->u.reassoc_req.listen_interval = listen_int; memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid, ETH_ALEN); } else { @@ -798,8 +802,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ); mgmt->u.assoc_req.capab_info = cpu_to_le16(capab); - mgmt->u.assoc_req.listen_interval = - cpu_to_le16(local->hw.conf.listen_interval); + mgmt->u.assoc_req.listen_interval = listen_int; } /* SSID */ diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 0fa57349c4e5..caf4098deeda 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -4393,3 +4393,23 @@ const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = { IEEE80211_WMM_IE_STA_QOSINFO_AC_BE, IEEE80211_WMM_IE_STA_QOSINFO_AC_BK }; + +__le16 ieee80211_encode_usf(int listen_interval) +{ + u16 ui, usf = 0; + + /* find greatest USF */ + while (usf < IEEE80211_MAX_USF) { + if (listen_interval % listen_int_usf[usf + 1]) + break; + usf += 1; + } + ui = listen_interval / listen_int_usf[usf]; + + /* error if there is a remainder. Should've been checked by user */ + if (WARN_ON_ONCE(ui > IEEE80211_MAX_UI)) + ui &= (1 << LISTEN_INT_USF_SHIFT) - 1; + listen_interval = usf << LISTEN_INT_USF_SHIFT | ui; + + return listen_interval; +}