From patchwork Fri Jun 10 07:26:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 12876586 X-Patchwork-Delegate: kvalo@adurom.com 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 CDDEBC43334 for ; Fri, 10 Jun 2022 07:27:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346450AbiFJH12 (ORCPT ); Fri, 10 Jun 2022 03:27:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346826AbiFJH1B (ORCPT ); Fri, 10 Jun 2022 03:27:01 -0400 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFC421451E1 for ; Fri, 10 Jun 2022 00:26:59 -0700 (PDT) Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 25A7QspvE010180, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36504.realtek.com.tw[172.21.6.27]) by rtits2.realtek.com.tw (8.15.2/2.71/5.88) with ESMTPS id 25A7QspvE010180 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 10 Jun 2022 15:26:54 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36504.realtek.com.tw (172.21.6.27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27; Fri, 10 Jun 2022 15:26:54 +0800 Received: from localhost (172.21.69.188) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Fri, 10 Jun 2022 15:26:54 +0800 From: Ping-Ke Shih To: CC: , , Subject: [PATCH 09/11] rtw89: fix long RX latency in low power mode Date: Fri, 10 Jun 2022 15:26:08 +0800 Message-ID: <20220610072610.27095-10-pkshih@realtek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220610072610.27095-1-pkshih@realtek.com> References: <20220610072610.27095-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.188] X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: trusted connection X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 06/10/2022 07:06:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIyLzYvMTAgpFekyCAwNjow?= =?big5_tw?b?MDowMA==?= X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-ServerInfo: RTEXH36504.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: fallback X-KSE-Antivirus-Interceptor-Info: fallback X-KSE-AntiSpam-Interceptor-Info: fallback Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org In low power mode, regular IO is power off, so we don't schedule napi to poll RX and TX completion. Therefore, calling ieee80211_rx_napi() with napi instance causes long RX latency. To fix this, use NULL as argument, and then it can use netif_receive_skb_list() to receive. Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw89/core.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c index b296c39329292..0da20723889e1 100644 --- a/drivers/net/wireless/realtek/rtw89/core.c +++ b/drivers/net/wireless/realtek/rtw89/core.c @@ -1437,11 +1437,17 @@ static void rtw89_core_rx_to_mac80211(struct rtw89_dev *rtwdev, struct sk_buff *skb_ppdu, struct ieee80211_rx_status *rx_status) { + struct napi_struct *napi = &rtwdev->napi; + + /* In low power mode, napi isn't scheduled. Receive it to netif. */ + if (unlikely(!test_bit(NAPI_STATE_SCHED, &napi->state))) + napi = NULL; + rtw89_core_hw_to_sband_rate(rx_status); rtw89_core_rx_stats(rtwdev, phy_ppdu, desc_info, skb_ppdu); /* In low power mode, it does RX in thread context. */ local_bh_disable(); - ieee80211_rx_napi(rtwdev->hw, NULL, skb_ppdu, &rtwdev->napi); + ieee80211_rx_napi(rtwdev->hw, NULL, skb_ppdu, napi); local_bh_enable(); rtwdev->napi_budget_countdown--; }