From patchwork Mon Dec 20 15:48:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 526299 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30E74C433FE for ; Mon, 20 Dec 2021 15:48:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235147AbhLTPsx (ORCPT ); Mon, 20 Dec 2021 10:48:53 -0500 Received: from dfw.source.kernel.org ([139.178.84.217]:43340 "EHLO dfw.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234859AbhLTPsx (ORCPT ); Mon, 20 Dec 2021 10:48:53 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DFA6260F67 for ; Mon, 20 Dec 2021 15:48:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AAF1EC36AE7; Mon, 20 Dec 2021 15:48:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1640015332; bh=GPLEmeAU8jLsi4WiN6AAPu6SgCbTrRhGYryhtYPRf+w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=crrINkDTeaEJ4XPstrcXauLRDfZHR5ientf3YFq2g6Hryx+L/x8IqTcAGlG57e122 IpcJAen8jyefdazMe1jGibAkyRvgDPshtKr3Bs9Qaicvb3n0YU6TUYgIHQe08utDpt oD3vb1Kzbs/RQVhGfdkOicmNlKVXrwnW6O9ytT34GJ/orC6yxDo+Cy/c54GFwY8j+O yQs8JdmlgumjE+GH2FNkTEN6VNsg9bi3ecK+5W9cggCBkwkqHpvGH2Rl84OMjUtQOg lVlwlWcYueQhzg9hcf/piOZXCbo9EURQGtzpfyBVZAQzrooMGvDshriTa7TOKKxUAw TNqIMsxlxcT/g== From: Lorenzo Bianconi To: j@w1.fi Cc: hostap@lists.infradead.org, linux-wireless@vger.kernel.org, nbd@nbd.name, ryder.lee@mediatek.com, evelyn.tsai@mediatek.com, lorenzo.bianconi@redhat.com Subject: [PATCH 6/9] DFS: introduce hostapd_dfs_request_channel_switch routine Date: Mon, 20 Dec 2021 16:48:21 +0100 Message-Id: X-Mailer: git-send-email 2.33.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org This is a preliminary patch to add Channel Switch Announcement for background radar detection. Tested-by: Owen Peng Signed-off-by: Lorenzo Bianconi --- src/ap/dfs.c | 159 +++++++++++++++++++++++++++------------------------ 1 file changed, 84 insertions(+), 75 deletions(-) diff --git a/src/ap/dfs.c b/src/ap/dfs.c index 94ef87d87..bd8a2484d 100644 --- a/src/ap/dfs.c +++ b/src/ap/dfs.c @@ -940,6 +940,85 @@ int hostapd_is_dfs_chan_available(struct hostapd_iface *iface) return dfs_check_chans_available(iface, start_chan_idx, n_chans); } +static int hostapd_dfs_request_channel_switch(struct hostapd_iface *iface, + int channel, int freq, + int secondary_channel, + u8 oper_centr_freq_seg0_idx, + u8 oper_centr_freq_seg1_idx) +{ + struct hostapd_hw_modes *cmode = iface->current_mode; + int ieee80211_mode = IEEE80211_MODE_AP, err, i; + struct csa_settings csa_settings; + u8 new_vht_oper_chwidth; + + wpa_printf(MSG_DEBUG, "DFS will switch to a new channel %d", channel); + wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, DFS_EVENT_NEW_CHANNEL + "freq=%d chan=%d sec_chan=%d", freq, channel, + secondary_channel); + + new_vht_oper_chwidth = hostapd_get_oper_chwidth(iface->conf); + hostapd_set_oper_chwidth(iface->conf, + hostapd_get_oper_chwidth(iface->conf)); + + /* Setup CSA request */ + os_memset(&csa_settings, 0, sizeof(csa_settings)); + csa_settings.cs_count = 5; + csa_settings.block_tx = 1; +#ifdef CONFIG_MESH + if (iface->mconf) + ieee80211_mode = IEEE80211_MODE_MESH; +#endif /* CONFIG_MESH */ + err = hostapd_set_freq_params(&csa_settings.freq_params, + iface->conf->hw_mode, + freq, channel, + iface->conf->enable_edmg, + iface->conf->edmg_channel, + iface->conf->ieee80211n, + iface->conf->ieee80211ac, + iface->conf->ieee80211ax, + secondary_channel, + new_vht_oper_chwidth, + oper_centr_freq_seg0_idx, + oper_centr_freq_seg1_idx, + cmode->vht_capab, + &cmode->he_capab[ieee80211_mode]); + + if (err) { + wpa_printf(MSG_ERROR, "DFS failed to calculate CSA freq params"); + hostapd_disable_iface(iface); + return err; + } + + for (i = 0; i < iface->num_bss; i++) { + err = hostapd_switch_channel(iface->bss[i], &csa_settings); + if (err) + break; + } + + if (err) { + wpa_printf(MSG_WARNING, "DFS failed to schedule CSA (%d) - trying fallback", + err); + iface->freq = freq; + iface->conf->channel = channel; + iface->conf->secondary_channel = secondary_channel; + hostapd_set_oper_chwidth(iface->conf, new_vht_oper_chwidth); + hostapd_set_oper_centr_freq_seg0_idx(iface->conf, + oper_centr_freq_seg0_idx); + hostapd_set_oper_centr_freq_seg1_idx(iface->conf, + oper_centr_freq_seg1_idx); + + hostapd_disable_iface(iface); + hostapd_enable_iface(iface); + + return 0; + } + + /* Channel configuration will be updated once CSA completes and + * ch_switch_notify event is received */ + wpa_printf(MSG_DEBUG, "DFS waiting channel switch event"); + + return 0; +} static struct hostapd_channel_data * dfs_downgrade_bandwidth(struct hostapd_iface *iface, int *secondary_channel, @@ -1179,21 +1258,13 @@ static int hostapd_dfs_start_channel_switch_cac(struct hostapd_iface *iface) return err; } - static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface) { struct hostapd_channel_data *channel; int secondary_channel; u8 oper_centr_freq_seg0_idx; u8 oper_centr_freq_seg1_idx; - u8 new_vht_oper_chwidth; int skip_radar = 1; - struct csa_settings csa_settings; - unsigned int i; - int err = 1; - struct hostapd_hw_modes *cmode = iface->current_mode; - u8 current_vht_oper_chwidth = hostapd_get_oper_chwidth(iface->conf); - int ieee80211_mode = IEEE80211_MODE_AP; wpa_printf(MSG_DEBUG, "%s called (CAC active: %s, CSA active: %s)", __func__, iface->cac_started ? "yes" : "no", @@ -1256,73 +1327,11 @@ static int hostapd_dfs_start_channel_switch(struct hostapd_iface *iface) } } - wpa_printf(MSG_DEBUG, "DFS will switch to a new channel %d", - channel->chan); - wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, DFS_EVENT_NEW_CHANNEL - "freq=%d chan=%d sec_chan=%d", channel->freq, - channel->chan, secondary_channel); - - new_vht_oper_chwidth = hostapd_get_oper_chwidth(iface->conf); - hostapd_set_oper_chwidth(iface->conf, current_vht_oper_chwidth); - - /* Setup CSA request */ - os_memset(&csa_settings, 0, sizeof(csa_settings)); - csa_settings.cs_count = 5; - csa_settings.block_tx = 1; -#ifdef CONFIG_MESH - if (iface->mconf) - ieee80211_mode = IEEE80211_MODE_MESH; -#endif /* CONFIG_MESH */ - err = hostapd_set_freq_params(&csa_settings.freq_params, - iface->conf->hw_mode, - channel->freq, - channel->chan, - iface->conf->enable_edmg, - iface->conf->edmg_channel, - iface->conf->ieee80211n, - iface->conf->ieee80211ac, - iface->conf->ieee80211ax, - secondary_channel, - new_vht_oper_chwidth, - oper_centr_freq_seg0_idx, - oper_centr_freq_seg1_idx, - cmode->vht_capab, - &cmode->he_capab[ieee80211_mode]); - - if (err) { - wpa_printf(MSG_ERROR, "DFS failed to calculate CSA freq params"); - hostapd_disable_iface(iface); - return err; - } - - for (i = 0; i < iface->num_bss; i++) { - err = hostapd_switch_channel(iface->bss[i], &csa_settings); - if (err) - break; - } - - if (err) { - wpa_printf(MSG_WARNING, "DFS failed to schedule CSA (%d) - trying fallback", - err); - iface->freq = channel->freq; - iface->conf->channel = channel->chan; - iface->conf->secondary_channel = secondary_channel; - hostapd_set_oper_chwidth(iface->conf, new_vht_oper_chwidth); - hostapd_set_oper_centr_freq_seg0_idx(iface->conf, - oper_centr_freq_seg0_idx); - hostapd_set_oper_centr_freq_seg1_idx(iface->conf, - oper_centr_freq_seg1_idx); - - hostapd_disable_iface(iface); - hostapd_enable_iface(iface); - return 0; - } - - /* Channel configuration will be updated once CSA completes and - * ch_switch_notify event is received */ - - wpa_printf(MSG_DEBUG, "DFS waiting channel switch event"); - return 0; + return hostapd_dfs_request_channel_switch(iface, channel->chan, + channel->freq, + secondary_channel, + oper_centr_freq_seg0_idx, + oper_centr_freq_seg1_idx); }