From patchwork Thu Feb 7 13:47:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felix Fietkau X-Patchwork-Id: 10801277 X-Patchwork-Delegate: kvalo@adurom.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 208A713A4 for ; Thu, 7 Feb 2019 13:47:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 101662B9FF for ; Thu, 7 Feb 2019 13:47:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0408D2BDDD; Thu, 7 Feb 2019 13:47:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A49D92B9FF for ; Thu, 7 Feb 2019 13:47:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727124AbfBGNr1 (ORCPT ); Thu, 7 Feb 2019 08:47:27 -0500 Received: from nbd.name ([46.4.11.11]:47504 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727073AbfBGNr0 (ORCPT ); Thu, 7 Feb 2019 08:47:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=nbd.name; s=20160729; h=References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender: Reply-To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=9W3SwsCyYWjEVlTXbTnPQbNZSTcDNVwMrAiKAexAZmQ=; b=A5qnjv9roY04E9VtmwmmEM+pPZ wMsI6MI9I38hJpnO3fo3JkOMgNJ0a6GTq08N6JPA34+1zm2kvpEKZmVG25sRQCaz4y06LaofEtFVe 88bk7+OgWAqKruaeUbikxwAECxUX7Aom3VPwV7Ccyrn4V8ul2uhzEPKPnKXYw+MIf1j0=; Received: by maeck.lan (Postfix, from userid 501) id 84E704F0BF9A; Thu, 7 Feb 2019 14:47:23 +0100 (CET) From: Felix Fietkau To: linux-wireless@vger.kernel.org Subject: [PATCH 6/7] mt76: measure the time between mt76x02_edcca_check runs Date: Thu, 7 Feb 2019 14:47:22 +0100 Message-Id: <20190207134723.59163-6-nbd@nbd.name> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20190207134723.59163-1-nbd@nbd.name> References: <20190207134723.59163-1-nbd@nbd.name> Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Based on system load and time needed by other calibration runs, the time between dev->mac_work runs can vary quite a bit. Calculate busy time based on the actual time difference in order to avoid potentially over-estimating busy time, which could lead to unnecessary tx blocking. Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt76x02.h | 1 + drivers/net/wireless/mediatek/mt76/mt76x02_mac.c | 11 +++++++++-- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02.h b/drivers/net/wireless/mediatek/mt76/mt76x02.h index 7e405297028f..3464b4ca2ea8 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02.h +++ b/drivers/net/wireless/mediatek/mt76/mt76x02.h @@ -117,6 +117,7 @@ struct mt76x02_dev { bool ed_monitor; u8 ed_trigger; u8 ed_silent; + ktime_t ed_time; }; extern struct ieee80211_rate mt76x02_rates[12]; diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c index aecf514bb89b..462ac030c08a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.c @@ -922,6 +922,7 @@ void mt76x02_edcca_init(struct mt76x02_dev *dev, bool enable) /* clear previous CCA timer value */ mt76_rr(dev, MT_ED_CCA_TIMER); + dev->ed_time = ktime_get_boottime(); } EXPORT_SYMBOL_GPL(mt76x02_edcca_init); @@ -929,10 +930,16 @@ EXPORT_SYMBOL_GPL(mt76x02_edcca_init); #define MT_EDCCA_BLOCK_TH 2 static void mt76x02_edcca_check(struct mt76x02_dev *dev) { - u32 val, busy; + ktime_t cur_time; + u32 active, val, busy; + cur_time = ktime_get_boottime(); val = mt76_rr(dev, MT_ED_CCA_TIMER); - busy = (val * 100) / jiffies_to_usecs(MT_MAC_WORK_INTERVAL); + + active = ktime_to_us(ktime_sub(cur_time, dev->ed_time)); + dev->ed_time = cur_time; + + busy = (val * 100) / active; busy = min_t(u32, busy, 100); if (busy > MT_EDCCA_TH) {