From patchwork Sat Oct 14 09:29:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Marangi X-Patchwork-Id: 152919 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:2908:b0:403:3b70:6f57 with SMTP id ib8csp2386126vqb; Sat, 14 Oct 2023 02:31:49 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF2jnIkjtk63suqekN+NtLHzKh0VAPD5S3vpON1h7jOORflzLs6o0iWDd/pe5cjLP/2Vx+z X-Received: by 2002:a05:6870:509:b0:1bf:9fa2:bfa3 with SMTP id j9-20020a056870050900b001bf9fa2bfa3mr31121161oao.1.1697275908793; Sat, 14 Oct 2023 02:31:48 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1697275908; cv=none; d=google.com; s=arc-20160816; b=zWx9ntd4q66MvQz5FH64/9pvPrUk4hBBm5ipik5hVhRJWozM/W20LGfh4y6TsBaSbG 0HePlwDEqpUCiJuxrhSDh5QlmPB20lqUTYOfTtg7qMft962HOkLsVtGWOkEWzCkKlZkq CL/Wk8xGHmA8AEs5NpCiB4RJsQugT/d4+hiH4533gpehnfe+uptcssmPyA1roc1S3T2c SdXpn7EvD9QvgMjquiAKZA2nNRbENNWegLJT/ssTqcZ7UMdBdksjFdLE9TNY9CBA38Q/ vpvj5B/gyw7DEgKIn3eFNiAjavhg03oUMDXje4Q70cZ4OKn8mf7TVjprpGw3bMNXnmpV CIsA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=0v0ZmldTmEHElH0nzfPoImpxhHxc/jfxnYXGlHkEaSw=; fh=jvZ7yAidasmFREPdFLzcn6X72yjJtrVlKHskOtM6Gso=; b=nGW59oWDrsdgsMwQLB1q8oHmpmET/c2/RtoPG83mJnFhV6FICFiUmU63PzQKNf7Cel Bs5pQbmmg41hJ2xe/z2AfxPPUGHKdpEHAPR+5G5+LNO9jeputEIWB0QWrIivuxwumj82 777+p+frziilkFNsNkTHDvg63X1w6DjEMEnBYdHZTIReIavgfamJKoaX6hZz51oJLxea N09Bo3SF2ABHcXnn4UbTqUwMA0LESH4VS/Lyy6v894gJ3adyAzBMTuqRy7C22LeGl/ik 8UjInHgAQPJJ/Gz/Z9X92x90C7chiBzxEMYP+82Tz7H7HC+0Oeb9TpgWYRHDPem1j9/K 6tYQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=UNYtVvW7; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from snail.vger.email (snail.vger.email. [2620:137:e000::3:7]) by mx.google.com with ESMTPS id i1-20020a63cd01000000b0057877ee7d78si6688292pgg.575.2023.10.14.02.31.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Oct 2023 02:31:48 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=UNYtVvW7; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 3902A807C852; Sat, 14 Oct 2023 02:30:44 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233066AbjJNJae (ORCPT + 20 others); Sat, 14 Oct 2023 05:30:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232957AbjJNJab (ORCPT ); Sat, 14 Oct 2023 05:30:31 -0400 Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3F18C2; Sat, 14 Oct 2023 02:30:29 -0700 (PDT) Received: by mail-wr1-x435.google.com with SMTP id ffacd0b85a97d-32157c8e4c7so2695601f8f.1; Sat, 14 Oct 2023 02:30:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697275828; x=1697880628; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=0v0ZmldTmEHElH0nzfPoImpxhHxc/jfxnYXGlHkEaSw=; b=UNYtVvW7ajFRMVa8Ax/KWADzDep8JWaqPRqepQHo1K+9Exmkx3oFp1WnCMFIeOOyVO 1drxG5n/EtyrZCNuILM4ToLaOFQ+lIzzfMK7mGhRVubQ2wlozH9vAxR2jdjfgxwOtemU 6+CW8XM4JgXiAb3sWUmSXX9XbL5JUaKYfvB4FH2tvq3VdbwG48L+wgPIm2NqWFOpndWi 3MYXRP6y6q3KvNPLRLV7MS23FleV/Tra2i15KPuH3KRjWfdDXxDb0fIrzMk37POzcuMr 6CXrIvjdJ8Cssyk0H1073kFuxnWvKuhEB66ywSWdlscpwnzGLsAkLa8NH+hVPFEPeqKU QjHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697275828; x=1697880628; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=0v0ZmldTmEHElH0nzfPoImpxhHxc/jfxnYXGlHkEaSw=; b=nySpxlYndndIOteA4iN4jCmCKCvBLiqafXCe5/ZNFJIOHyVTJSZIfefTS8sfd2TSd+ nCyseuBHt6VfCMtL4fh5e1eU1o5rYsPprikmJIBE59c6snLwOuxocUGLSAUPmgiASMQF jwTkK2NEgbaI5luYB2hUPvCs4jm3PkzuJ4HWFQL+phSBAe4aQP5T0jfVhoYSIF60lm4p 898Td2xOsWD1JCJi4/3RzjBxRQDpIRuU+3wgzJVg1lfyVIPAwQc9ntQy6V2xMa8DbKCz RMAahIZCxzlKEcBqOe9LJ9NbUkG7WODqvtFWsTZcl3RAPWbieVH7TjNmXonpCz8tqZAJ HMzA== X-Gm-Message-State: AOJu0YzX3R3uDpRnV9DOQeHBvoLp01DrC4a9mxYqdbDkE8eTDHMLc4iy 6AvoA5KCodAXAJAy76+kcDHLPhQYP8c= X-Received: by 2002:adf:f48e:0:b0:324:8239:2873 with SMTP id l14-20020adff48e000000b0032482392873mr27747535wro.37.1697275827698; Sat, 14 Oct 2023 02:30:27 -0700 (PDT) Received: from localhost.localdomain (93-34-89-13.ip49.fastwebnet.it. [93.34.89.13]) by smtp.googlemail.com with ESMTPSA id u12-20020adff88c000000b0032d9a1f2ec3sm3691564wrp.27.2023.10.14.02.30.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Oct 2023 02:30:27 -0700 (PDT) From: Christian Marangi To: Raju Rangoju , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexandre Torgue , Jose Abreu , Maxime Coquelin , Ping-Ke Shih , Kalle Valo , Simon Horman , Daniel Borkmann , Jiri Pirko , Hangbin Liu , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-wireless@vger.kernel.org Cc: Christian Marangi Subject: [net-next PATCH v3 1/4] net: introduce napi_is_scheduled helper Date: Sat, 14 Oct 2023 11:29:51 +0200 Message-Id: <20231014092954.1850-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231014092954.1850-1-ansuelsmth@gmail.com> References: <20231014092954.1850-1-ansuelsmth@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Sat, 14 Oct 2023 02:30:44 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1779722783559203836 X-GMAIL-MSGID: 1779722783559203836 We currently have napi_if_scheduled_mark_missed that can be used to check if napi is scheduled but that does more thing than simply checking it and return a bool. Some driver already implement custom function to check if napi is scheduled. Drop these custom function and introduce napi_is_scheduled that simply check if napi is scheduled atomically. Update any driver and code that implement a similar check and instead use this new helper. Signed-off-by: Christian Marangi --- drivers/net/ethernet/chelsio/cxgb3/sge.c | 8 -------- drivers/net/wireless/realtek/rtw89/core.c | 2 +- include/linux/netdevice.h | 23 +++++++++++++++++++++++ net/core/dev.c | 2 +- 4 files changed, 25 insertions(+), 10 deletions(-) diff --git a/drivers/net/ethernet/chelsio/cxgb3/sge.c b/drivers/net/ethernet/chelsio/cxgb3/sge.c index 2e9a74fe0970..71fa2dc19034 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb3/sge.c @@ -2501,14 +2501,6 @@ static int napi_rx_handler(struct napi_struct *napi, int budget) return work_done; } -/* - * Returns true if the device is already scheduled for polling. - */ -static inline int napi_is_scheduled(struct napi_struct *napi) -{ - return test_bit(NAPI_STATE_SCHED, &napi->state); -} - /** * process_pure_responses - process pure responses from a response queue * @adap: the adapter diff --git a/drivers/net/wireless/realtek/rtw89/core.c b/drivers/net/wireless/realtek/rtw89/core.c index cca18d7ea1dd..6faf4dcf007c 100644 --- a/drivers/net/wireless/realtek/rtw89/core.c +++ b/drivers/net/wireless/realtek/rtw89/core.c @@ -1919,7 +1919,7 @@ static void rtw89_core_rx_to_mac80211(struct rtw89_dev *rtwdev, 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))) + if (unlikely(!napi_is_scheduled(napi))) napi = NULL; rtw89_core_hw_to_sband_rate(rx_status); diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 1c7681263d30..b8bf669212cc 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -482,6 +482,29 @@ static inline bool napi_prefer_busy_poll(struct napi_struct *n) return test_bit(NAPI_STATE_PREFER_BUSY_POLL, &n->state); } +/** + * napi_is_scheduled - test if NAPI is scheduled + * @n: NAPI context + * + * This check is "best-effort". With no locking implemented, + * a NAPI can be scheduled or terminate right after this check + * and produce not precise results. + * + * NAPI_STATE_SCHED is an internal state, napi_is_scheduled + * should not be used normally and napi_schedule should be + * used instead. + * + * Use only if the driver really needs to check if a NAPI + * is scheduled for example in the context of delayed timer + * that can be skipped if a NAPI is already scheduled. + * + * Return True if NAPI is scheduled, False otherwise. + */ +static inline bool napi_is_scheduled(struct napi_struct *n) +{ + return test_bit(NAPI_STATE_SCHED, &n->state); +} + bool napi_schedule_prep(struct napi_struct *n); /** diff --git a/net/core/dev.c b/net/core/dev.c index 3ca746a5f0ad..8d267fc0b988 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6527,7 +6527,7 @@ static int __napi_poll(struct napi_struct *n, bool *repoll) * accidentally calling ->poll() when NAPI is not scheduled. */ work = 0; - if (test_bit(NAPI_STATE_SCHED, &n->state)) { + if (napi_is_scheduled(n)) { work = n->poll(n, weight); trace_napi_poll(n, work, weight); }